CN217656434U - Battery charging and discharging conversion device - Google Patents

Abstract

The utility model provides a battery charging and discharging conversion device, the signal circuit of which is respectively connected with a charging/discharging circuit and a control circuit and is connected with at least one of a charger and a charged device, the charger is the charger of a mobile terminal; the control circuit controls the charging/discharging circuit to convert the voltage and the current output by the charger into the voltage and the current matched with the battery according to the charging information provided by the signal circuit, so as to charge the battery, or controls the charging/discharging circuit to convert the electric energy of the battery into the voltage and the current matched with the charged equipment according to the charged equipment information provided by the signal circuit, so as to supply power to the equipment. The utility model discloses avoided abandoning of charger to use, reduced pollution and waste to reduce the heating capacity of battery, thereby reduced the volume of equipment, practiced thrift the cost, guaranteed user's safety.

Description

Battery charging and discharging conversion device

Technical Field

The utility model relates to an equipment field of charging especially relates to a battery charge-discharge conversion equipment.

Background

Along with the rapid development of informatization in recent years, the development of the continuously upgraded quick charging technology of the mobile terminal equipment is realized, the power of the charger of the mobile terminal equipment is also increased, along with the popularization of the mobile terminal equipment, almost every family has a large number of chargers to be idle, and along with the replacement of the equipment, most of the chargers are discarded by people and become electronic waste, so that a large amount of waste and pollution are caused.

And, at present, the equipment of a lot of external batteries on the market all adopts the form of charging seat to charge external battery, there is the contact in battery and power during the charging, power during operation can produce a large amount of power losses and generate heat, and because the battery is more sensitive to the temperature in charging process, overheated charging can have certain potential safety hazard, at present in order to reduce the charger of charging in-process equipment to the heat transfer of battery and equipment heat dissipation, the size design of most chargers and equipment is huge and need increase the trompil heat dissipation, this kind of design has solved some problems, but cause the cost extravagant, and because the trompil form has also increased electric shock safety risk, certain potential safety hazard has been caused to user's use.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a battery charging and discharging conversion device, which can utilize the existing charger to charge the battery through the device and can also use the battery to discharge and control to supply power to terminal equipment, and meanwhile, the device and the charger adopt the data line connection to structurally avoid the contact between the charger power supply and the battery, so that the influence of the heat quantity of the battery in the charging process is less; the charger is prevented from being discarded, the utilization rate is improved, pollution and waste are reduced, the heating capacity of the battery is reduced, the size of equipment is reduced, the cost is saved, and the safety of a user is ensured.

In order to solve the above problem, the utility model discloses a technical scheme do: a battery charge-discharge conversion device, comprising: a charge/discharge circuit, a control circuit, a battery and a signal circuit; the signal circuit is respectively connected with the charging/discharging circuit and the control circuit, is connected with at least one of a charger and a charged device, and is used for identifying a charging signal of the charger and sending the charging signal to the charger, and transmitting electric energy output by the charger to the charging/discharging circuit, or is used for reading charging information of the charged device and sending the charging information to the control circuit, the control circuit controls the charging/discharging circuit to work, and the charger is a charger of a mobile terminal and is connected with the charging signal circuit through a data line; the control circuit is respectively connected with the charging/discharging circuit and the battery; the control circuit comprises a charge-discharge control circuit and a battery identification circuit; the charge-discharge control circuit is used for triggering and generating a charge control signal corresponding to the battery identification signal after receiving the battery identification signal and the charge information sent by the battery identification circuit, and controlling the charge/discharge circuit to work, or triggering and generating a discharge control signal corresponding to the discharge information after receiving the discharge information, and controlling the charge/discharge circuit to work; and the charging/discharging circuit converts the voltage and the current corresponding to the electric energy into the voltage and the current matched with the battery according to the charging control signal, or converts the electric energy of the battery into the voltage and the current matched with the charged equipment according to the discharging control signal.

Furthermore, the battery charge-discharge conversion device also comprises a charging interface, a discharging interface and a charge-discharge interface, wherein the charging interface, the discharging interface and the charge-discharge interface are all connected with the charge/discharge circuit.

Further, the signal circuit comprises at least one of a charging signal circuit and a discharging signal circuit, wherein the charging signal circuit is respectively connected with the charging/discharging circuit, the control circuit and the charger, and the discharging signal circuit is respectively connected with the charging/discharging circuit, the control circuit and the charged device.

The battery charging and discharging conversion device further comprises a power management chip, the charging signal circuit and the discharging signal circuit share the power management chip, the charging signal circuit comprises a fourth field effect transistor, a fifth field effect transistor, a sixth field effect transistor, a fifth resistor, a sixth resistor, a seventh resistor and an eighth resistor, a drain electrode of the fourth field effect transistor is connected with a power pin of the charging interface, a grid electrode of the fourth field effect transistor is connected with first ends of the fifth resistor and the sixth resistor and a grid electrode of the fifth field effect transistor, a source electrode of the fifth field effect transistor is connected with the other end of the fifth resistor, a drain electrode of the fifth field effect transistor is connected with the charging/discharging circuit, a drain electrode of the sixth field effect transistor is connected with a second end of the sixth resistor, a grid electrode of the sixth resistor is connected with a first end of the seventh resistor, a first end of the eighth resistor is connected with a second end of the seventh resistor, a second end of the sixth field effect transistor is connected with the source electrode of the sixth field effect transistor and grounded, and a first input/output interface of the power management chip is connected with a second end of the eighth resistor.

The charging signal circuit and the discharging signal circuit respectively comprise a seventh field effect transistor, an eighth field effect transistor, a ninth resistor, a tenth resistor, an eleventh resistor and a twelfth resistor, a drain electrode of the seventh field effect transistor is connected with a power pin of the charging interface, a gate electrode of the seventh field effect transistor is connected with first ends of the ninth resistor and the tenth resistor and a gate electrode of the eighth field effect transistor, a source electrode of the eighth field effect transistor is connected with the other end of the ninth resistor, a drain electrode of the eighth field effect transistor is connected with the charging/discharging circuit, a drain electrode of the ninth field effect transistor is connected with a second end of the tenth resistor, a gate electrode of the ninth field effect transistor is connected with a first end of the eleventh resistor, a first end of the twelfth resistor is connected with a second end of the eleventh resistor, a second end of the eighth field effect transistor is connected with the source electrode of the ninth field effect transistor and grounded, and a second input/output interface of the power management chip is connected with a first end of the twelfth field effect transistor.

Furthermore, the charging/discharging circuit further comprises a current detection circuit, the current detection circuit is connected with the charging/discharging circuit, the power management chip and the battery charging interface, and the power management chip detects the charging current through the current detection circuit.

Furthermore, one end of the charging/discharging circuit is connected with the current detection circuit, the other end of the charging/discharging circuit is connected with the charging signal circuit and the discharging signal circuit, and the power management chip controls the charging/discharging circuit.

Furthermore, the battery identification circuit comprises at least one of a battery voltage detection circuit, a battery signal detection circuit and a communication/fixed resistance detection circuit, and the battery voltage detection circuit, the battery pack signal detection circuit and the communication/fixed resistance detection circuit are respectively connected with the power management chip and the battery.

Further, the charge-discharge control circuit comprises a driving power supply circuit and an IC power supply circuit, the IC power supply circuit is connected with the power management chip and supplies power to the power management chip, and the driving power supply circuit is respectively connected with the charging circuit, the discharging circuit and the IC power supply circuit and supplies working voltage to the charge/discharge circuit and the power management chip.

Further, the IC power supply circuit includes a sixth chip, a fourth diode, a fifth diode, a sixth diode, a fifteenth capacitor, and a sixteenth capacitor, a voltage output pin of the sixth chip is connected to a first end of the fifteenth capacitor and a voltage input pin of the power management chip, a common terminal is grounded and connected to second ends of the fifteenth capacitor and the sixteenth capacitor, a first end of the sixteenth capacitor is connected to a cathode of the sixth diode, the fifth diode, and the sixth diode, an anode of the fourth diode is connected to an anode of the battery, an anode of the fifth diode is connected to a power pin of the charging interface, and an anode of the sixth diode is connected to a power pin of the charging/discharging interface.

Furthermore, the discharge signal circuit comprises a first field effect transistor, a second field effect transistor, a third field effect transistor, a first resistor, a second resistor, a third resistor and a fourth resistor, wherein the drain electrode of the first field effect transistor is connected with the power pin of the discharge interface, the grid electrode of the first field effect transistor is connected with the first ends of the first resistor and the second resistor and the grid electrode of the second field effect transistor, the source electrode of the first field effect transistor is connected with the source electrode of the second field effect transistor and the other end of the first resistor, the drain electrode of the second field effect transistor is connected with the charging/discharging circuit, the drain electrode of the third field effect transistor is connected with the second end of the second resistor, the grid electrode of the third field effect transistor is connected with the first end of the third resistor, the first end of the fourth resistor is connected with the second end of the third resistor, the second end of the fourth resistor is connected with the source electrode of the third field effect transistor and grounded, and the third input/output interface of the power management chip is connected with the first end of the fourth resistor.

Compared with the prior art, the beneficial effects of the utility model reside in that: the device can be used for charging the battery by utilizing the existing charger, and can also be used for supplying power to the terminal equipment by using the battery for discharge control, and meanwhile, the device and the charger are connected by adopting a data line, so that the contact between the power supply of the charger and the battery is structurally avoided, and the influence of heat on the battery in the charging process is smaller; the charger is prevented from being discarded, the utilization rate is improved, pollution and waste are reduced, the heating capacity of the battery is reduced, the size of equipment is reduced, the cost is saved, and the safety of a user is ensured.

Drawings

Fig. 1 is a structural diagram of an embodiment of the battery charging and discharging conversion device of the present invention;

fig. 2 is a structural diagram of another embodiment of the battery charging/discharging switching device of the present invention;

fig. 3 is a circuit diagram of an embodiment of a charging/discharging circuit in the battery charging/discharging switching device of the present invention;

fig. 4 is a circuit diagram of an embodiment of a current amplification detection module and a battery charging interface in the battery charging/discharging conversion device of the present invention;

fig. 5 is a circuit diagram of an embodiment of a driving power supply module in the battery charging/discharging switching device of the present invention;

fig. 6 is a circuit diagram of an embodiment of an IC power supply module in the battery charging/discharging conversion device of the present invention;

fig. 7 is a circuit diagram of an embodiment of the charging signal circuit, the discharging signal circuit, the power management chip and the battery identification circuit in the battery charging/discharging switching device of the present invention.

In the figure: q4, a fourth field effect transistor; r6 and a sixth resistor; q6, a sixth field effect transistor; r7 and a seventh resistor; r8 and an eighth resistor; u1, a power management chip; q5, a fifth field effect transistor; r5 and a fifth resistor; q7, seventh field effect transistor; r10, tenth resistance; q9 and a ninth field effect transistor; r11 and an eleventh resistor; r12 and a twelfth resistor; q8, an eighth field effect transistor; r9 and a ninth resistor; l1, a first inductor; u2 and a second chip; d1, a first diode; q17, seventeenth field effect transistor; q18 and an eighteenth field effect transistor; c3, a third capacitor; u3, a third chip; q19 and a nineteenth field effect transistor; q20 and a twentieth field effect transistor; c4, a fourth capacitor; d2, a second diode; R45A, a voltage sampling resistor; r43, a forty-third resistor; r44, a forty-fourth resistor; c5, a fifth capacitor; c6, a sixth capacitor; c7, a seventh capacitor; r15, a fifteenth resistor; r17, seventeenth resistor; r16, sixteenth resistor; c8, an eighth capacitor; c9, ninth capacitor; u4 and a fourth chip; r34, thirty-fourth resistor; r36, thirty-sixth resistor; r35, thirty-fifth resistor; c14, a fourteenth capacitance; r20, twentieth resistor; r21 and a twenty-first resistor; c12, a twelfth capacitor; r24 and a twenty-fourth resistor; q14, a fourteenth field effect transistor; r25 and a twenty-fifth resistor;

q13, a thirteenth field effect transistor; r22 and a twenty-second resistor; r23 and a twenty-third resistor; r33, thirty-third resistor; q15, a fifteenth field effect transistor; r31, a thirty-first resistance; r32, thirty-second resistor;

r30, thirtieth resistor; c13, a thirteenth capacitor; r28, twenty-eighth resistor; r26 and a twenty-sixth resistor; r27 and a twenty-seventh resistor; r29 and a twenty-ninth resistor; q16, sixteenth field effect transistor; u6 and a sixth chip; d4, a fourth diode; d5, a fifth diode; d6, a sixth diode; c15, a fifteenth capacitor; c16, a sixteenth capacitor; u5 and a fifth chip; c11, an eleventh capacitor; d3, a third diode; l2 and a second inductor; r18, eighteenth resistor; c10, tenth capacitance; r19, nineteenth resistor; q1, a first field effect transistor; r2 and a second resistor; q3, a third field effect transistor; r3 and a third resistor; r4 and a fourth resistor; q2, a second field effect transistor; r1 and a first resistor; an LED1, a first light emitting diode; LED2, second light emitting diode; r13 and a thirteenth resistor; r14, fourteenth resistance; R45B, a voltage detection resistor;

u4 and a fourth chip; q11 and an eleventh field effect transistor; q12 and a twelfth field effect transistor; r37, thirty-seventh resistor; r38, thirty-eighth resistor; r39, thirty-ninth resistor; r40, the fortieth resistor.

Detailed Description

The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application. It should be noted that the various embodiments of the present disclosure, described and illustrated in the figures herein generally, may be combined with each other without conflict, and that the structural members or functional modules therein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the disclosure, provided in the accompanying drawings, is not intended to limit the scope of the disclosure, as claimed, but is merely representative of selected embodiments of the disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

The terminology used in the description of the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

Referring to fig. 1-7, fig. 1 is a structural diagram of an embodiment of a battery charging/discharging switching device according to the present invention; fig. 2 is a structural diagram of another embodiment of the battery charging/discharging switching device of the present invention; fig. 3 is a circuit diagram of an embodiment of a charging/discharging circuit in the battery charging/discharging switching device of the present invention; fig. 4 is a circuit diagram of an embodiment of a current amplification detection module and a battery charging interface in the battery charging/discharging conversion device of the present invention; fig. 5 is a circuit diagram of an embodiment of a driving power supply module in the battery charging/discharging switching device of the present invention;

fig. 6 is a circuit diagram of an embodiment of an IC power supply module in the battery charging/discharging conversion device of the present invention; fig. 7 is a circuit diagram of an embodiment of the charging signal circuit, the discharging signal circuit, the power management chip and the battery identification circuit in the battery charging/discharging switching device of the present invention. The battery charging/discharging switching device of the present invention will be described in detail with reference to fig. 1 to 7.

In this embodiment, the battery charge-discharge conversion device includes: a charge/discharge circuit, a control circuit, a battery and a signal circuit; the signal circuit is respectively connected with the charging/discharging circuit and the control circuit, is connected with at least one of a charger and a charged device, and is used for identifying a charging signal of the charger and sending the charging signal to the charger when being connected with the charger, and transmitting electric energy output by the charger to the charging/discharging circuit, or is used for reading charging information of the charged device and sending the charging information to the control circuit when being connected with the charged device, the control circuit controls the charging/discharging circuit to work, and the charger is a charger of a mobile terminal and is connected with the charging signal circuit through a data line; the control circuit is respectively connected with the charging/discharging circuit and the battery; the control circuit comprises a charge-discharge control circuit and a battery identification circuit; the charging and discharging control circuit is used for triggering and generating a charging control signal corresponding to the battery identification signal after receiving the battery identification signal and the charging information sent by the battery identification circuit and controlling the charging/discharging circuit to work, or triggering and generating a discharging control signal corresponding to the discharging information after receiving the discharging information and controlling the charging/discharging circuit to work; the charging/discharging circuit converts the voltage and the current corresponding to the electric energy into the voltage and the current matched with the battery according to the charging control signal, or converts the electric energy of the battery into the voltage and the current matched with the charged equipment according to the discharging control signal.

The signal circuit comprises at least one of a charging signal circuit and a discharging signal circuit, wherein the charging signal circuit is respectively connected with the charging/discharging circuit, the control circuit and the charger, and the discharging signal circuit is respectively connected with the charging/discharging circuit, the control circuit and the charged equipment.

In this embodiment, the charged device is a mobile terminal device or other products that need power supply, the battery is an external battery pack of all devices visible on the market, and power is supplied to other mobile terminal devices through a battery charging and discharging conversion device, where the battery may be a battery pack formed by combining a plurality of batteries.

The battery charging and discharging conversion device further comprises a charging interface, a discharging interface and a charging and discharging interface, wherein the charging and discharging interfaces are connected with the charging/discharging circuit and the power management chip U1.

In this embodiment, the charging interface, the discharging interface, and the charging/discharging interface are different types of USB interfaces, and in other embodiments, the discharging interface and the charging/discharging interface may also be a 24Pin main power supply interface, an ATX12V4Pin interface, an ATX12V/EPS12V4+4/8Pin interface, a serial interface, a parallel interface, and other interfaces capable of performing power transmission.

In ase:Sub>A specific embodiment, the discharging interface is ase:Sub>A USB-A interface, the charging interface is ase:Sub>A Micro-B charging interface, and the charging and discharging interface is ase:Sub>A USB-C/TYPE-C interface. The charging and discharging interface is a two-in-one interface, namely, the charging interface and the discharging interface can be used for charging and discharging, and the charging interface and the discharging interface are in two input/output terminal forms, and can independently exist in one or simultaneously exist in the two input/output terminal forms.

The battery charging and discharging conversion device further comprises a power management chip U1, the charging signal circuit and the discharging signal circuit share the power management chip U1, the charging signal circuit comprises a fourth field-effect tube Q4, a fifth field-effect tube Q5, a sixth field-effect tube Q6, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8 and the power management chip U1, the drain electrode of the fourth field-effect tube Q4 is connected with a power pin of a charging interface, the grid electrode is connected with the first ends of the fifth resistor R5 and the sixth resistor R6 and the grid electrode of the fifth field-effect tube Q5, the source electrode is connected with the source electrode of the fifth field-effect tube Q5 and the other end of the fifth resistor R5, the drain electrode of the fifth field-effect tube Q5 is connected with the charging/discharging circuit, the drain electrode of the sixth resistor Q6 is connected with the second end of the sixth resistor R6, the grid electrode is connected with the first end of the seventh resistor R7, the first end of the eighth resistor R8 is connected with the second end of the seventh resistor R7, the second end of the sixth resistor Q6 is connected with the ground, and the input and the output interface of the eighth field-effect tube U8 is connected with the first end of the first input/output interface.

In this embodiment, the data pin of the charging interface is connected to the data pins DP2 and DM2 of the power management chip U1.

The charging signal circuit and the discharging signal circuit connected with the USB-C/TYPE-C interface respectively comprise a seventh field effect transistor Q7, a tenth resistor R10, a ninth field effect transistor Q9, an eleventh resistor R11 and a twelfth resistor R12, the drain electrode of the seventh field effect transistor Q7 is connected with a power pin of the charging and discharging interface, the source electrode is connected with the charging circuit, the grid electrode is connected with the first end of the tenth resistor R10, the drain electrode of the ninth field effect transistor Q9 is connected with the second end of the tenth resistor R10, the grid electrode is connected with the first end of the eleventh resistor R11, the first end of the twelfth resistor R12 is grounded and connected with the source electrode of the ninth field effect transistor Q9, and the second end is connected with the second end of the eleventh resistor R11 and the second input and output interface of the power management chip U1.

In this embodiment, the charging signal circuit and the discharging signal circuit in the USB-C/TYPE-C interface further include an eighth fet Q8 and a ninth resistor R9, a drain of the eighth fet Q8 is connected to a first end of the ninth resistor R9 and a source of the seventh fet Q7, and a gate of the eighth fet Q8 is connected to a second end of the ninth resistor R9 and a first end of the tenth resistor R10.

In this embodiment, the charging/discharging circuit further includes a current detection circuit, the current detection circuit is connected to the charging/discharging circuit, the power management chip U1, and the battery charging interface, and the power management chip U1 detects the charging current through the current detection circuit. If the charging current in the charging circuit is smaller or smaller than the preset value during daily charging, the current detection circuit can be omitted in consideration of cost factors, and the power management chip U1 is used for directly sampling the voltage of the voltage detection resistor R45B to detect the charging current.

One end of the charging/discharging circuit is connected with the current detection circuit, the other end of the charging/discharging circuit is connected with the charging signal circuit and the discharging signal circuit, and the power management chip U1 controls the charging/discharging circuit.

In this embodiment, the charge/discharge circuit includes a second chip U2, a first diode D1, a seventeenth fet Q17, an eighteenth fet Q18, and a third capacitor C3, wherein a fourth pin of the second chip U2 is connected to an anode of the first diode D1, a cathode of the first diode D1 is connected to a first pin of the second chip U2 and a first end of the third capacitor C3, an eighth pin of the second chip U2 is connected to a gate of the seventeenth fet Q17, a seventh pin is connected to a first end of the first inductor L1, a source of the seventeenth fet Q17, and a drain of the eighteenth fet Q18, a fifth pin is connected to a second end of the third capacitor C3 and a gate of the eighteenth fet Q18, a sixth pin of the second chip U2 is connected to the ninth pin and to ground, and a source of the eighteenth fet Q18 is grounded.

The charging/discharging circuit further comprises a third chip U3, a nineteenth field effect transistor Q19, a twentieth field effect transistor Q20, a fourth capacitor C4 and a second diode D2, a drain electrode of the nineteenth field effect transistor Q19 is connected with a battery charging interface, a source electrode is connected with a second end of the first inductor L1 and a drain electrode of the twentieth field effect transistor Q20, a grid electrode is connected with an eighth pin of the second chip U2, a source electrode of the twentieth field effect transistor Q20 is grounded, and the grid electrode is connected with a first end of the fourth capacitor C4 and a fifth pin of the third chip U3. A second end of the fourth capacitor C4 is connected to the first pin of the third chip U3 and the cathode of the second diode D2, and an anode of the second diode D2 is connected to the fourth pin of the third chip U3.

The voltage rising module and the voltage dropping module in the charging/discharging circuit can be simultaneously or independently applied, and can be divided into the following states mainly depending on the setting mode of the practical application of the battery charging/discharging switching device:

in the first state: only the charging function is used, when the input voltage is always greater than the voltage of the battery, only the voltage reduction function of the charging/discharging circuit can be used for charging the battery, and the voltage boosting device can not be used;

in the second state: only the charging function is used, when the input voltage is always less than the voltage of the charged battery, only the boosting function of the charging/discharging circuit can be applied to charge the battery, and the voltage reduction device can not be used;

the third state: only the charging function is used, when the input voltage is lower than the voltage of the battery pack, the charging boosting function is used for charging the battery, when the input voltage is higher than the voltage of the battery, the charging voltage reduction function is used for charging the battery, the mode has no hard requirement on the voltage provided by the input power plug, and the charging boosting and voltage reduction can be freely adjusted to meet the charging requirement;

the fourth state: only the discharging function is used, when the voltage required by the charged equipment is always lower than the voltage of the battery, the voltage reduction function of the charging/discharging circuit can be only applied to supply power to the charged equipment, and the boosting device can not be used;

in a fifth state: only the discharging function is used, when the required voltage of the charged equipment is always higher than the voltage of the battery, the boosting function of the charging/discharging circuit can be only applied to supply power to the charged equipment, and the voltage reducing device can not be used;

the sixth state: only the discharging function is used, when the battery voltage is greater than the required voltage of the charged equipment, the discharging voltage-reducing function is used for supplying power to the charged equipment, when the battery voltage is less than the required voltage of the charged equipment, the discharging voltage-boosting function is used for supplying power to the charged equipment, the mode has no hard requirement on the battery voltage, and discharging voltage-boosting and voltage-reducing adjustment can be freely carried out to meet the power supply requirement of the charged equipment

In the seventh state: the battery pack can be charged by using the electric energy provided by the charger, and the charged equipment can be powered by using the electric energy of the battery pack; in the mode, the charging/discharging circuit performs voltage rising and voltage falling regulation control according to actual charging or discharging requirements and by combining the battery voltage and the voltage required by the charged equipment so as to meet the requirements of charging the battery or supplying power to the charged equipment.

In a specific embodiment, the current detection circuit includes a voltage sampling resistor R45A, a forty-third resistor R43, a forty-fourth resistor R44, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, a fifteenth resistor R15, a seventeenth resistor R17, a sixteenth resistor R16, an eighth capacitor C8, and a ninth capacitor C9, a first end of the voltage sampling resistor R45A is connected to the drain of the nineteenth fet Q19 and a first end of the forty-third resistor R43, a second end of the voltage sampling resistor R45A is connected to a first end of the forty-fourth resistor R44 and the positive electrode of the battery voltage in the battery charging interface, and a second end of the forty-fourth resistor is connected to a second end of the sixth capacitor C6, a first end of the seventh capacitor C7, and a fifth pin of the fourth chip U4. A second end of the forty-third resistor R43 is connected to the second end of the fifth capacitor C5, the first end of the sixth capacitor C6, and the fourth pin of the fourth chip U4, and a first end of the fifth capacitor C5 is grounded. A first end of the fifteenth resistor R15 is connected to the sixth pin of the fourth chip U4, a second end of the fifteenth resistor R15 is connected to the first end of the seventeenth resistor R17 and the first end of the sixteenth resistor R16, and a second end of the seventeenth resistor R17 is connected to the first end of the ninth capacitor C9. A second end of the sixteenth resistor R16 is connected to the second end of the ninth capacitor C9 and the second end of the eighth capacitor C8, and is grounded, and a first end of the eighth capacitor C8 is connected to the third pin of the fourth chip U4.

The battery identification circuit comprises at least one of a battery voltage detection circuit, a battery pack signal detection circuit and a communication/fixed resistance detection circuit, and the battery identification circuit is increased or decreased according to the set state of the battery. The battery voltage detection circuit, the battery pack signal detection circuit and the communication/fixed resistance detection circuit are respectively connected with the power management chip U1 and the battery.

The battery voltage detection circuit comprises a thirty-fourth resistor R34, a thirty-sixth resistor R36, a thirty-fifth resistor R35 and a fourteenth capacitor C14, wherein a first end of the thirty-fourth resistor R34 is connected with a battery positive electrode signal, a second end of the thirty-fifth resistor R35 is connected with a first end of the thirty-sixth resistor R36, a first end of the fourteenth capacitor C14 is connected with an analog signal input pin Vsense of the power management chip U1, a second end of the thirty-sixth resistor R36 is connected, and a second end of the fourteenth capacitor C14 is connected with a second end of the thirty-fifth resistor R35 and is grounded.

The battery signal detection circuit comprises a twentieth resistor R20, a twenty-first resistor R21 and a twelfth capacitor C12, wherein the first end of the twentieth resistor R20 is connected with a reference voltage source, the second end of the twentieth resistor R20 is connected with a battery signal interface in a battery charging interface and the second end of the twenty-first resistor R21, the first end of the twentieth resistor R20 is connected with the first end of the twelfth capacitor C12 and an analog signal input pin of the power management chip U1, and the second end of the twelfth capacitor C12 is grounded.

The communication/fixed resistance detection circuit comprises a twenty-fourth resistor R24, a fourteenth field-effect tube Q14, a twenty-fifth resistor R25, a thirteenth field-effect tube Q13, a twenty-second resistor R22, a twenty-third resistor R23, a thirty-third resistor R33, a fifteenth field-effect tube Q15, a thirty-first resistor R31, a thirty-second resistor R32, a thirtieth resistor R30, a thirteenth capacitor C13, a twenty-eighth resistor R28, a sixteenth resistor R16, a twenty-sixth resistor R26, a twenty-seventh resistor R27, a twenty-ninth resistor R29 and a sixteenth field-effect tube Q16, wherein a first end of the twenty-fourth resistor R24 is connected with a reference voltage source, a second end is connected with a gate of the fourteenth field-effect tube Q14, a first end of the thirty-third resistor R33, a drain of the sixteenth field-effect tube Q16, a first end of the twenty-fifth resistor R25 and a first end of the thirteenth field-effect tube Q13, a source of the fourteenth field-effect tube Q14 is connected with a second end of the fifth field-effect tube R25, a source of the thirteenth field-effect tube Q13, a second end of the TXR resistor R23 and a second end of the TXR chip are connected with a gate of the power source of the twenty-first end of the twenty-fourth field-effect tube Q13, a second end of the chip. A first end of the twenty-sixth resistor R26 is connected to the RXD pin of the power management chip U1, a first end of the twenty-seventh resistor R27, and a first end of the twenty-ninth resistor R29, a second end of the twenty-sixth resistor R26 is connected to a source of the sixteenth fet Q16, a drain of the sixteenth fet Q16 is connected to a COM interface in the power charging interface, a gate of the sixteenth fet Q16 is connected to a first end of the twenty-eighth resistor R28 and a first end of the twenty-seventh resistor R27, and a second end of the twenty-eighth resistor R28 is connected to a second end of the twenty-ninth resistor R29, and is connected to a reference voltage source. A first end of the thirtieth resistor R30 is connected to the ADC2 pin of the power management chip U1 and a first end of the thirteenth capacitor C13, a second end of the third resistor R3 is connected to the drain of the sixteenth fet Q16, and a second end of the thirteenth capacitor C13 is grounded. A first end of the thirty-third resistor R33 is connected to the COM interface of the power charging interface, and a second end is connected to the drain of the fifteenth fet Q15. The gate of the fifteenth field effect transistor Q15 is connected to the second end of the thirty-second resistor R32 and the first end of the thirty-first resistor R31, the source is connected to the reference voltage source and the second end of the thirty-first resistor R31, and the first end of the thirty-second resistor R32 is connected to the EN5 pin of the power management chip U1.

The control circuit comprises a driving power supply circuit and an IC power supply circuit, the IC power supply circuit is connected with the power management chip U1 and supplies power to the power management chip U1, and the driving power supply circuit is respectively connected with the charging/discharging circuit and the IC power supply circuit and supplies working voltage to the charging/discharging circuit and the power management chip U1.

The IC power supply circuit comprises a sixth chip U6, a fourth diode D4, a fifth diode D5, a sixth diode D6, a fifteenth capacitor C15 and a sixteenth capacitor C16, wherein a voltage output pin of the sixth chip U6 is connected with a first end of the fifteenth capacitor C15 and a voltage input pin of the power management chip U1, a common end of the sixth chip U6 is grounded and is connected with second ends of the fifteenth capacitor C15 and the sixteenth capacitor C16, the first end of the sixteenth capacitor C16 is connected with an input end of the sixth chip U6, the fourth diode D4, the fifth diode D5 and a cathode of the sixth diode D6, an anode of the fourth diode D4 is connected with the driving power supply circuit, an anode of the fifth diode D5 is used as a reference voltage source and is connected with a power supply pin of the charging interface, and an anode of the sixth diode D6 is connected with a power supply pin of the charging and discharging interface. The IC power supply circuit is a voltage reduction circuit and outputs the voltage reduced to proper voltage to the power management chip U1.

The driving power supply circuit comprises a boosting circuit and a switch circuit, wherein the boosting circuit comprises a fifth chip U5, an eleventh capacitor C11, a third diode, a second inductor L2, an eighteenth resistor R18, a tenth capacitor C10 and a nineteenth resistor R19, the second end of the eleventh capacitor C11 is grounded, the first end of the eleventh capacitor C11 is connected with the second end of the second inductor L2, the fifth pin and the sixth pin of the fifth chip U5, the first end of the second inductor L2 is connected with the anode of the third diode and the first pin of the fifth chip U5, the cathode of the third diode is connected with the first end of the eighteenth resistor R18 and the first end of the tenth capacitor C10, the second end of the eighteenth resistor R18 is connected with the second end of the nineteenth resistor R19 and the third pin of the fifth chip U5, the first end of the nineteenth resistor R19 is grounded and is connected with the second end of the tenth capacitor C10.

The discharging signal circuit comprises a first field effect transistor Q1, a second resistor R2, a third field effect transistor Q3, a third resistor R3 and a fourth resistor R4, the drain electrode of the first field effect transistor Q1 is connected with a power supply lead of the discharging interface, the drain electrode is connected with the discharging circuit, the grid electrode is connected with the first end of the second resistor R2, the drain electrode of the third field effect transistor Q3 is connected with the second end of the second resistor R2, the source electrode is connected with the first end of the fourth resistor R4, the first end of the third resistor R3 is connected with the grid electrode of the third field effect transistor Q3, and the second end is connected with the second end of the fourth resistor R4 and a third input and output interface of the power supply management chip U1.

In this embodiment, the discharge signal circuit further includes a second field effect transistor Q2 and a first resistor R1, a source of the second field effect transistor Q2 is connected to a source of the first field effect transistor Q1 and a first end of the first resistor R1, a drain of the second field effect transistor Q2 is connected to a drain of the seventeenth field effect transistor Q17, and a second end of the first resistor R1 is connected to a first end of the second resistor R2.

In this embodiment, the battery charging and discharging conversion device further includes an indicator light circuit, the indicator light circuit includes a first light emitting diode LED1, a second light emitting diode LED2, a thirteenth resistor R13, and a fourteenth resistor R14, first ends of the thirteenth resistor R13 and the fourteenth resistor R14 are connected to the reference voltage source, an anode of the first light emitting diode LED1 is connected to a second end of the thirteenth resistor R13, a cathode of the first light emitting diode LED1 is connected to the first input/output interface of the power management chip U1, an anode of the second light emitting diode LED2 is connected to the second end of the fourteenth resistor R14, and a cathode of the second light emitting diode LED2 is connected to the second input/output interface of the power management chip U1.

The ground pin of power management chip U1 is connected with voltage detection resistance R45B's first end, the ground pin of charge-discharge interface to ground, voltage detection resistance R45B's second end is connected with the battery voltage negative pole in the battery charging interface.

The following describes the battery charge/discharge conversion device through a specific operation flow of the battery charge/discharge conversion device.

When the device is in a charging state, after a charger is inserted into the conversion device through a charging and discharging interface or a charging interface, the power management chip U1 communicates with the charger through pins DP2, DM2, CC1 and CC2 to transfer the charger to a maximum power state, the state of the battery is detected through the battery identification circuit, when the battery is judged to need to be charged, the battery management chip outputs a high level through a pin EN3 to open the driving power supply circuit, opens the second chip U2 and the third chip U3 through the pins EN1 and EN2, and outputs PWM1 and PWM2 signals to the second chip U2 and the third chip U3 to carry out voltage rising and falling control to charge the battery;

when the device is in a discharging state, the device is connected with terminal equipment through a charging and discharging interface or a discharging interface, the power management chip U1 sends out signals through pins DP2, DM2, CC1 and CC2 or pins DP1 and DM1 and communicates with the terminal equipment to read the required voltage value of the terminal equipment, the second chip U2 and the third chip U3 are opened through the pins EN1 and EN2, and PWM1 and PWM2 signals are output to the second chip U2 and the third chip U3 to carry out voltage rising and reducing control to supply power to the terminal equipment.

Has the beneficial effects that: the battery charging and discharging conversion device of the utility model is provided with the charging signal circuit and the discharging signal circuit in the circuit of the device, the battery can be charged by the existing charger through the device, and the battery can also be used for discharging control to supply power to the terminal equipment; the charger is prevented from being abandoned, the utilization rate is improved, the pollution and the waste are reduced, the heating capacity of the battery is reduced, the size of equipment is reduced, the cost is saved, and the safety of a user is ensured.

Claims (11)

1. A battery charge-discharge conversion device, comprising: a charge/discharge circuit, a control circuit, a battery and a signal circuit;

the signal circuit is respectively connected with the charging/discharging circuit and the control circuit, is connected with at least one of a charger and a charged device, and is used for identifying a charging signal of the charger and sending the charging signal to the charger, and transmitting electric energy output by the charger to the charging/discharging circuit, or is used for reading charging information of the charged device and sending the charging information to the control circuit, the control circuit controls the charging/discharging circuit to work, and the charger is a charger of a mobile terminal and is connected with the charging signal circuit through a data line;

the control circuit is respectively connected with the charging/discharging circuit and the battery; the control circuit comprises a charge-discharge control circuit and a battery identification circuit; the charging and discharging control circuit is used for triggering and generating a charging control signal corresponding to the battery identification signal after receiving the battery identification signal and the charging information sent by the battery identification circuit and controlling the charging/discharging circuit to work, or triggering and generating a discharging control signal corresponding to the discharging information after receiving the discharging information and controlling the charging/discharging circuit to work;

and the charging/discharging circuit converts the voltage and the current corresponding to the electric energy into the voltage and the current matched with the battery according to the charging control signal, or converts the electric energy of the battery into the voltage and the current matched with the charged equipment according to the discharging control signal.

2. The battery charge-discharge conversion device according to claim 1, further comprising a charging interface, a discharging interface, and a charge-discharge interface, wherein the charging interface, the discharging interface, and the charge-discharge interface are connected to the charge/discharge circuit.

3. The battery charge-discharge conversion device according to claim 2, wherein the signal circuit comprises at least one of a charge signal circuit and a discharge signal circuit, wherein the charge signal circuit is connected to the charge/discharge circuit, the control circuit and the charger, and the discharge signal circuit is connected to the charge/discharge circuit, the control circuit and the charged device.

4. The battery charge-discharge conversion device according to claim 3, further comprising a power management chip, wherein the charge signal circuit and the discharge signal circuit share the power management chip, the charge signal circuit comprises a fourth fet, a fifth fet, a sixth fet, a fifth resistor, a sixth resistor, a seventh resistor, and an eighth resistor, a drain of the fourth fet is connected to the power pin of the charging interface, a gate of the fourth fet is connected to the first terminals of the fifth resistor and the sixth resistor, and a gate of the fifth fet is connected to the gate of the fifth fet, a source of the fifth fet is connected to the other terminal of the fifth resistor, a drain of the fifth fet is connected to the charge/discharge circuit, a drain of the sixth fet is connected to the second terminal of the sixth resistor, a gate of the sixth resistor is connected to the first terminal of the seventh resistor, a first terminal of the eighth resistor is connected to the second terminal of the seventh resistor, a second terminal of the eighth resistor is connected to the source of the sixth fet and to the ground, and a first input/output interface of the power management chip is connected to the eighth terminal of the eighth resistor.

5. The battery charge-discharge conversion device according to claim 4, wherein the charge signal circuit and the discharge signal circuit each include a seventh fet, an eighth fet, a ninth resistor, a tenth resistor, an eleventh resistor, and a twelfth resistor, a drain of the seventh fet is connected to the power pin of the charge interface, a gate of the seventh fet is connected to the first ends of the ninth resistor and the tenth resistor, and a gate of the eighth fet, a source of the eighth fet is connected to the other end of the ninth resistor, a drain of the eighth fet is connected to the charge/discharge circuit, a drain of the ninth fet is connected to the second end of the tenth resistor, a gate of the ninth fet is connected to the first end of the eleventh resistor, a first end of the twelfth resistor is connected to the second end of the eleventh resistor, a second end of the twelfth resistor is connected to the source of the ninth fet and grounded, and a second input/output interface of the power management chip is connected to the first end of the twelfth resistor.

6. The battery charge-discharge conversion device according to claim 4, wherein the charge/discharge circuit further comprises a current detection circuit, the current detection circuit is connected to the charge/discharge circuit, the power management chip and the battery charging interface, and the power management chip detects the charging current through the current detection circuit.

7. The battery charge-discharge conversion device according to claim 6, wherein one end of said charge/discharge circuit is connected to a current detection circuit, and the other end is connected to said charge signal circuit and said discharge signal circuit, said power management chip controlling the charge/discharge circuit.

8. The battery charge-discharge conversion device according to claim 4, wherein the battery identification circuit comprises at least one of a battery voltage detection circuit, a battery signal detection circuit, and a communication/fixed resistance detection circuit, and the battery voltage detection circuit, the battery pack signal detection circuit, and the communication/fixed resistance detection circuit are respectively connected to the power management chip and the battery.

9. The battery charging and discharging switching device according to claim 4, wherein the charging and discharging control circuit comprises a driving power supply circuit and an IC power supply circuit, the IC power supply circuit is connected with the power management chip to supply power to the power management chip, and the driving power supply circuit is respectively connected with the charging circuit, the discharging circuit and the IC power supply circuit to supply working voltage to the charging/discharging circuit and the power management chip.

10. The battery charging/discharging switching device of claim 9, wherein the IC power supply circuit comprises a sixth chip, a fourth diode, a fifth diode, a sixth diode, a fifteenth capacitor, and a sixteenth capacitor, a voltage output pin of the sixth chip is connected to a first end of the fifteenth capacitor and a voltage input pin of the power management chip, a common terminal is grounded and connected to second ends of the fifteenth capacitor and the sixteenth capacitor, a first end of the sixteenth capacitor is connected to the input terminal of the sixth chip, the fourth diode, the fifth diode, and a cathode of the sixth diode, an anode of the fourth diode is connected to the positive electrode of the battery, an anode of the fifth diode is connected to the power pin of the charging interface, and an anode of the sixth diode is connected to the power pin of the charging/discharging interface.

11. The battery charging and discharging switching device according to claim 4, wherein the discharging signal circuit comprises a first field effect transistor, a second field effect transistor, a third field effect transistor, a first resistor, a second resistor, a third resistor, and a fourth resistor, the drain of the first field effect transistor is connected to the power pin of the discharging interface, the gate is connected to the first ends of the first resistor and the second resistor, and the gate of the second field effect transistor, the source is connected to the other end of the first resistor, the drain of the second field effect transistor is connected to the charging/discharging circuit, the drain of the third field effect transistor is connected to the second end of the second resistor, the gate is connected to the first end of the third resistor, the first end of the fourth resistor is connected to the second end of the third resistor, the second end is connected to the source of the third field effect transistor and is grounded, and the third input/output interface of the power management chip is connected to the first end of the fourth resistor.

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