Wireless conference unit battery activation management device

Abstract

The utility model relates to a wireless conference unit battery activation management device, which comprises a power switch, a mains supply interface module, a power conversion module and a plurality of battery activation control circuits, each path of battery activation control circuit comprises a charging / discharging change-over switch, a charging module, a discharging module and a charging and discharging protection module; the charging / discharging change-over switch performs switching control on the charging module and the discharging module; the charging module performs standard charging on the wireless conference unit battery; the discharging module is used for performing constant-current discharging on the wireless conference unit battery; the charging and discharging protection module carries out charging and discharging protection on the wireless conference unit when the charging module or the discharging module works. According to the utility model, on the premise of simple circuit structure and low manufacturing cost, the charging and discharging activation management requirement of the conference unit battery is met, the activation management of a plurality of batteries can be simultaneously carried out, and the working efficiency is obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery management, and more specifically to a battery activation management device for a wireless conference unit. Background Art

[0002] In the wireless digital conference system, multi-channel U-segment wireless conference system and its derivative products, the conference units are all powered by 3.7V polymer lithium-ion batteries. However, due to the self-discharge characteristics of lithium polymer batteries, long-term idle storage will cause them to gradually enter a discharge state, which will lead to a decline in battery performance. In order to ensure that the battery can maintain optimal performance and extend its service life when it is officially installed, the general practice in the industry is to perform a standard charge and discharge activation process on the battery every three months. The process usually includes charging to 4.2V at a current of 0.2C, then discharging to 3.0V at the same current, and finally charging to 3.9V at a current of 0.2C again.

[0003] Although there are battery activation devices such as large-scale capacity test cabinets on the market, such devices are often expensive and have a limited number of channels. Therefore, the existing activation processing methods are not applicable to terminal product manufacturers, which in turn makes it impossible for terminal product manufacturers to effectively manage the activation of conference units. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a battery activation management device for a wireless conference unit in view of the problems existing in the prior art.

[0005] The technical solution adopted by the utility model to solve the technical problem is: construct a wireless conference unit battery activation management device, including: a power switch, a mains interface module connected to the power switch, a power conversion module connected to the mains interface module, and a multi-channel battery activation control circuit connected to the power conversion module;

[0006] Each of the battery activation control circuits comprises: a charge / discharge switch, a charging module, a discharging module and a charge / discharge protection module;

[0007] The power switch is used to control the power on and off of the wireless conference unit battery activation management device;

[0008] The mains interface module is used to access AC power to input a power signal to the wireless conference unit battery activation management device;

[0009] The power conversion module is used to convert the power signal into a DC signal;

[0010] The charge / discharge switch is used to perform switching control on the charging module and the discharging module, so as to control the wireless conference unit battery activation management device to perform charging or discharging of the wireless conference unit battery;

[0011] The charging module is used to perform standard charging on the battery of the wireless conference unit according to the switching of the charge / discharge switch;

[0012] The discharge module is used to perform constant current discharge on the battery of the wireless conference unit according to the switching of the charge / discharge switch;

[0013] The charge and discharge protection module performs charge and discharge protection on the battery of the wireless conference unit when the charging module or the discharging module is working.

[0014] In the wireless conference unit battery activation management device described in the utility model, each of the battery activation control circuits further includes: a power protection module, a charge / discharge status indication module;

[0015] The power protection module is disposed between the charge / discharge switch and the charging module, and is used to perform power protection on the wireless conference unit battery activation management device;

[0016] The charge / discharge status indication module is connected to the charge / discharge switching switch and is used to perform charge status indication or discharge status indication according to the switching of the charge / discharge switching switch.

[0017] In the wireless conference unit battery activation management device described in the utility model, each of the battery activation control circuits further includes: a charge / discharge power indication module;

[0018] The charge / discharge quantity indication module is connected to the charge module and the discharge module, and is used for indicating the charge / discharge quantity when the charge module or the discharge module is working.

[0019] In the wireless conference unit battery activation management device described in the utility model, each of the battery activation control circuits further includes: a battery interface, a discharge information display module and a heat dissipation module;

[0020] The battery interface is respectively connected to the charging module, the discharging module and the charging and discharging protection module, and is used to connect the charging module, the discharging module and the charging and discharging module to the battery of the wireless conference unit;

[0021] The discharge information display module is connected to the discharge module and is used to display the discharge information when the discharge module is working;

[0022] The heat dissipation module is connected to the discharge module and is used for dissipating heat for the power tube in the discharge module when the discharge module is working.

[0023] In the wireless conference unit battery activation management device described in the utility model, the power conversion module includes: a step-down circuit, a transformer and a power output port; the power output port is the output end of the power conversion module;

[0024] The input end of the step-down circuit is connected to the mains interface module, the output end of the step-down circuit is connected to the input end of the transformer, and the output end of the transformer is connected to the power output interface.

[0025] In the wireless conference unit battery activation management device described in the utility model, the charge / discharge status indication module includes: a twelfth resistor, a seventh light-emitting diode, a fifth resistor and a sixth light-emitting diode; the power protection module includes: a fuse, an ESD electrostatic tube and a rectifier tube;

[0026] The first pin, the third pin and the sixth pin of the charge / discharge switch are suspended, the second pin and the fourth pin of the charge / discharge switch are respectively connected to the discharge module, the eighth pin of the charge / discharge switch is connected to the input end of the fuse, the seventh pin of the charge / discharge switch is connected to the output end of the power conversion module, the fifth pin of the charge / discharge switch is connected to the input end of the fifth resistor, and the output end of the fifth resistor is grounded through the sixth light-emitting diode; the eighth pin of the charge / discharge switch is also connected to the input end of the twelfth resistor, and the output end of the twelfth resistor is grounded through the seventh light-emitting diode;

[0027] The output end of the fuse is connected to the input end of the ESD electrostatic tube, the output end of the ESD electrostatic tube is grounded, the input end of the rectifier tube is connected to the output end of the fuse, and the output end of the rectifier tube is connected to the charging module.

[0028] In the wireless conference unit battery activation management device described in the utility model, the charging module includes: a first resistor, a first capacitor, a fifth capacitor, a charging chip, a second capacitor, a third capacitor, a fourth resistor, a first inductor, a third resistor, an eighth capacitor and a seventh capacitor;

[0029] The first end of the first resistor and the first end of the first capacitor are connected to the output end of the power protection module, the second end of the first resistor is grounded through the fifth capacitor, and the second end of the first capacitor is grounded;

[0030] The first pin of the charging chip is connected to the output end of the power protection module, the eighth pin of the charging chip is connected to the discharge module, the first end of the second capacitor is connected to the eighth pin of the charging chip, and the third capacitor and the fourth capacitor are sequentially connected in parallel with the second capacitor;

[0031] The seventh pin of the charging chip is connected to the battery interface through the first inductor, the first end of the third resistor is connected to the second end of the first inductor, the second end of the third resistor is respectively connected to the sixth pin of the charging chip and the first end of the eighth capacitor, the second end of the eighth capacitor is grounded, and the seventh capacitor is connected in parallel to the series circuit composed of the third resistor and the eighth capacitor.

[0032] In the wireless conference unit battery activation management device described in the utility model, the discharge module includes: a seventh resistor, a sixth resistor, a tenth resistor, a second operational amplifier, an eighth resistor, a ninth resistor, a tenth resistor, a third operational amplifier, a first triode, a second triode, a thirteenth resistor, a reference device and an adjustable resistor;

[0033] The negative input terminal of the second operational amplifier is grounded through the tenth resistor, the positive input terminal of the second operational amplifier is connected to the connection terminal of the seventh resistor and the reference device, the input terminal of the seventh resistor is connected to the charge / discharge switch, the sixth resistor is connected between the negative input terminal and the output terminal of the second operational amplifier, the output terminal of the second operational amplifier is connected to the positive input terminal of the third operational amplifier through the eighth resistor and the ninth resistor in sequence, the power supply terminal of the third operational amplifier is connected to the charge / discharge switch, and the third pin of the reference device is also connected to the connection terminal of the eighth resistor and the ninth resistor;

[0034] The first end of the adjustable resistor is connected to the positive input end of the third operational amplifier, and the third end of the adjustable resistor is grounded; the negative input end of the third operational amplifier is connected to the emitter of the second transistor, the ground end of the third operational amplifier is grounded, the output end of the third operational amplifier is connected to the base of the first transistor, the collector of the first transistor is connected to the charging module, the emitter of the first transistor is connected to the base of the second transistor, the collector of the second transistor is connected to the collector of the first transistor, and the emitter of the second transistor is grounded through the thirteenth resistor.

[0035] In the wireless conference unit battery activation management device described in the utility model, the charge and discharge protection module includes: a battery protection chip, a first MOS tube, a second MOS tube, a ninety-fourth resistor, a ninety-fifth resistor and a fifty-fifth capacitor;

[0036] The fifth pin of the battery protection chip is connected to the battery interface through the ninety-fifth resistor, the fifth pin of the battery protection chip is also grounded through the fifty-fifth capacitor, the second pin of the battery protection chip is grounded through the ninety-fourth resistor, the third pin of the battery protection chip is connected to the fourth pin of the first MOS tube and the sixth pin of the second MOS tube, the first pin of the battery protection chip is connected to the sixth pin of the first MOS tube and the fourth pin of the second MOS tube; the third pin of the first MOS tube and the first pin of the second MOS tube are grounded.

[0037] In the wireless conference unit battery activation management device described in the utility model, the charge / discharge power indication module includes: a second light-emitting tube, a third light-emitting tube, a fourth light-emitting tube and a fifth light-emitting tube;

[0038] The positive electrode of the second light-emitting tube is connected to the second pin of the charging chip, the negative electrode of the second light-emitting tube is connected to the fourth pin of the charging chip, the negative electrode of the third light-emitting tube is connected to the second pin of the charging chip, the positive electrode of the third light-emitting tube is connected to the fourth pin of the charging chip, the positive electrode of the fourth light-emitting tube is connected to the third pin of the charging chip, the negative electrode of the fourth light-emitting tube is connected to the fourth pin of the charging chip, the negative electrode of the fifth light-emitting tube is connected to the third pin of the charging chip, and the positive electrode of the fifth light-emitting tube is connected to the fourth pin of the charging chip.

[0039] The implementation of the wireless conference unit battery activation management device of the utility model has the following beneficial effects: including: a power switch, a mains interface module, a power conversion module and a multi-way battery activation control circuit; each battery activation control circuit includes: a charge / discharge switch, a charging module, a discharge module and a charge / discharge protection module; the charge / discharge switch controls the switching of the charging module and the discharge module; the charging module performs standard charging on the wireless conference unit battery; the discharge module performs constant current discharge on the wireless conference unit battery; the charge / discharge protection module performs charge and discharge protection on the wireless conference unit when the charging module or the discharge module is working. The utility model meets the charge and discharge activation management requirements for conference unit batteries with a simple circuit structure and low manufacturing cost, and can perform activation management on multiple batteries at the same time, significantly improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0041] Figure 1 It is a structural schematic diagram of the battery activation management device for the wireless conference unit provided by the utility model;

[0042] Figure 2It is a functional block diagram of the battery activation control circuit provided by the utility model;

[0043] Figure 3 This is a circuit schematic diagram of the power conversion module provided by the utility model;

[0044] Figure 4 It is a circuit schematic diagram of the charge / discharge switching switch and the charge / discharge status indication module provided by the utility model;

[0045] Figure 5 It is a circuit schematic diagram of the power protection module, charging module and battery interface provided by the utility model;

[0046] Figure 6 It is a circuit schematic diagram of the discharge module provided by the utility model;

[0047] Figure 7 This is a circuit schematic diagram of the charge and discharge protection module provided by the utility model;

[0048] Figure 8 It is a circuit principle diagram of the functional interface provided by the utility model. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0050] In view of the fact that battery activation equipment such as large-scale capacity test cabinets on the market are expensive and have limited channel data, and are not suitable for terminal manufacturers to store and manage inventory batteries, the utility model provides a wireless conference unit battery activation management device. The wireless conference unit battery activation management device has the characteristics of low cost and a large number of channels, and also has high reliability, and can realize regular activation management of polymer lithium-ion batteries in the inventory of terminal manufacturers.

[0051] refer to Figure 1 , Figure 1 This is a structural schematic diagram of a preferred embodiment of a wireless conference unit battery activation management device provided by the utility model.

[0052] Specifically, Figure 1As shown in FIG. 1 , the wireless conference unit battery activation management device comprises: a power switch 10, a mains interface module 20 connected to the power switch 10, a power conversion module 30 connected to the mains interface module 20, and a multi-way battery activation control circuit 200 connected to the power conversion module 30. In a preferred embodiment, the wireless conference unit battery activation management device can be provided with 10-way battery activation control circuits 200 on one board, that is, Figure 1 As shown, a #1 battery activation control circuit, a #2 battery activation control circuit, a #3 battery activation control circuit, ..., a #N battery activation control circuit may be provided, with a total of N battery activation control circuits. N is an integer greater than or equal to, and N may be 10.

[0053] In this embodiment, the power switch 10 is used to control the power on and off of the wireless conference unit battery activation management device. Specifically, the power switch 10 is the main power switch of the wireless conference unit battery activation management device, which can control the power on and off of the entire device, thereby facilitating user operation and safety control.

[0054] In this embodiment, the mains interface module 20 is used to access AC power to input a power signal to the wireless conference unit battery activation management device. Specifically, the mains interface module 20 can be an AC 220V mains interface, which is a universal interface that can be used to connect to the power source of the device to input power to the device.

[0055] In this embodiment, the power conversion module 30 is used to convert the power signal into a DC signal. Specifically, the power conversion module 30 can convert the 220V AC power connected to the mains interface module 20 into a stable DC signal (i.e., a stable 5V DC) required inside the device to ensure the normal operation of each functional module in the device.

[0056] In this embodiment, by connecting the multiple battery activation control circuits 200 to the power conversion module 30, it is possible to realize that multiple activation control circuits in one device share one DC signal, without the need to set up multiple channels separately. Each battery activation control circuit 200 is used to perform activation management on the battery of the wireless conference unit, that is, each battery activation control circuit 200 can be used to perform standard charging and constant current discharge on the connected wireless conference unit battery, thereby realizing activation management of the battery, and at the same time, it can also perform charging and discharging protection on the battery, ensuring the safety of battery charging and discharging.

[0057] refer to Figure 2 , Figure 2 This is a functional block diagram of a preferred embodiment of each battery activation control circuit 200 provided by the present invention.

[0058] Specifically, Figure 2As shown, each battery activation control circuit 200 includes: a charge / discharge switch 201 , a charging module 204 , a discharging module 206 , a charge / discharge protection module 209 , a power protection module 203 and a charge / discharge state indication module 202 .

[0059] Among them, the input end of the charge / discharge switching switch 201 is connected to the output end of the power conversion module 30, the output end of the charge / discharge switching switch 201 is respectively connected to the charging module 204 and the discharging module 206, and the power protection module 203 is arranged between the charge / discharge switching switch 201 and the charging module 204, and the charge and discharge protection module 209 is connected to the battery interface 208.

[0060] In this embodiment, the power protection module 203 is used to perform power protection on the wireless conference unit battery activation management device. Specifically, the power protection module 203 can protect the weak power supply entering the device to prevent abnormal situations such as short circuit, reverse connection, and electrostatic surge from causing damage to the device's rear circuit.

[0061] In this embodiment, the charge / discharge switch 201 is used to perform switching control on the charging module 204 and the discharging module 206 to control the wireless conference unit battery activation management device to perform charging or discharging of the wireless conference unit battery. Specifically, when the charge / discharge switch 201 is switched to the charging mode, the charging module 204 performs charging of the wireless conference unit battery; when the charge / discharge switch 201 is switched to the discharging mode, the discharging module 206 performs discharging of the wireless conference unit battery.

[0062] In this embodiment, the charging module 204 is used to perform standard charging on the battery of the wireless conference unit according to the switching of the charge / discharge switch 201. Specifically, the charging module 204 can work when entering the charging mode and charge the battery in a standard manner, that is, constant current charging to 4.2V, and then constant voltage trickle charging to a charging current of approximately 0A.

[0063] In this embodiment, the discharge module 206 is used to perform constant current discharge on the battery of the wireless conference unit according to the switching of the charge / discharge switch 201. Specifically, the discharge module 206 can work when entering the discharge mode and perform constant current discharge on the battery. Among them, the discharge module 206 can flexibly adjust the set discharge current according to different battery specifications to meet different discharge needs.

[0064] In this embodiment, the charge / discharge state indication module 202 is connected to the charge / discharge switch 201, and is used to indicate the charge state or the discharge state according to the switching of the charge / discharge switch 201. Specifically, the charge / discharge state indicator module may include a charge state indication circuit and a discharge state indication circuit. When entering the charge mode, the charge state indication circuit works to indicate that it is currently in the charge mode; when entering the discharge mode, the discharge state indication circuit works to indicate that it is currently in the discharge mode.

[0065] In this embodiment, the charge and discharge protection module 209 protects the battery of the wireless conference unit from charge and discharge when the charging module 204 or the discharge module 206 is working. Specifically, by setting the charge and discharge protection module 209, the battery can be protected from overcharge, overdischarge, and overcurrent when the charging module 204 or the discharge module 206 is working, so as to prevent abnormal conditions from causing damage to the battery.

[0066] Furthermore, if Figure 2 As shown, each battery activation control circuit 200 further includes: a charge / discharge power indication module 205; the charge / discharge power indication module 205 is connected to the charging module 204 and the discharging module 206, and is used to indicate the charge / discharge power when the charging module 204 or the discharging module 206 is working. Specifically, by setting the charge / discharge power indication module 205, the charging power indication can be performed during charging, and the discharging power indication can be performed during discharging.

[0067] Furthermore, if Figure 2 As shown, each battery activation control circuit 200 also includes: a charge and discharge cascade interface 211. By setting the charge and discharge cascade interface 211, the user can cascade connect multiple wireless conference unit battery activation management devices, thereby flexibly expanding the number of batteries activated at the same time and further improving work efficiency.

[0068] Furthermore, if Figure 2 As shown, each battery activation control circuit 200 further includes: a battery interface 208 , a discharge information display module 207 and a heat dissipation module 210 .

[0069] In this embodiment, the battery interface 208 is connected to the charging module 204, the discharging module 206 and the charging and discharging protection module 209 respectively, and is used to connect the charging module 204, the discharging module 206 and the charging and discharging module 209 to the battery of the wireless conference unit. Specifically, in this embodiment, the charging module 204, the discharging module 206, and the charging and discharging protection module 209 need to be connected to the battery interface 208 to access the battery of the wireless conference unit (the battery is a rechargeable battery) through the battery interface 208.

[0070] In this embodiment, the discharge information display module 207 is connected to the discharge module 206 to display the discharge information when the discharge module 206 is working. Optionally, the discharge information display module 207 can be a digital voltage and current meter, which can monitor and display the discharge voltage and current in real time, and is convenient for setting and adjusting the constant current.

[0071] In this embodiment, the heat dissipation module 210 is connected to the discharge module 206, and is used to dissipate heat for the power tube in the discharge module 206 when the discharge module 206 is working. Optionally, the heat dissipation module 210 can be a heat dissipation fan, which can dissipate heat for the discharge power tube to prevent the high heat generated during discharge from damaging the device.

[0072] refer to Figure 3 to Figure 8 , which is a circuit schematic diagram of a part of the circuit provided by the utility model.

[0073] Specifically, Figure 3 , which is a circuit schematic diagram of the power conversion module 30 provided by the utility model.

[0074] In this embodiment, the power conversion module 30 includes: a step-down circuit, a transformer and a power output port; the power output port is the output end of the power conversion module 30; the input end of the step-down circuit is connected to the AC interface module 20, the output end of the step-down circuit is connected to the input end of the transformer, and the output end of the transformer is connected to the power output interface.

[0075] Specifically, Figure 3As shown, EE13 is a transformer. J7 is an AC220 mains interface, and the AC signal is connected through J7 and transmitted to the step-down circuit through the chip U5. The step-down circuit includes: step-down chip U4, the fourteenth resistor R14, the fifteenth resistor R15, the ninth capacitor C9 and the tenth capacitor C10. The sixth pin of the step-down chip U4 is connected to the first pin of the chip U5, the fifth pin of the step-down chip U4 is connected to the first pin of the chip U5, the first end of the ninth capacitor C9 is connected to the first pin of the chip U5, the second end of the ninth capacitor C9 is connected to the second pin of the chip U5 and is connected to the ground, the second pin of the step-down chip U4 is grounded through the sixteenth resistor, the fourteenth resistor R14 and the fifteenth resistor R15 are connected in series and connected between the fifth pin and the first pin of the step-down chip U4, the fifth pin of the step-down chip U4 is also connected to the second end of the transformer through the tenth capacitor C10, the sixth end of the transformer is connected to the fifth pin of the step-down chip U4, the first end of the transformer is grounded, the fourth end of the transformer is connected to the positive input end of the power output interface J9 through D10, the third end of the transformer is connected to the negative input end of the power output interface J9, the power output interface J9 is the output port of the power conversion module 30, and the converted stable 5V DC signal can be transmitted to other functional modules in the device through the power output interface J9 to provide electrical energy to other functional modules.

[0076] like Figure 4 Shown and Figure 5 The charge / discharge state indication module 202 includes: a twelfth resistor R12, a seventh light emitting diode D7, a fifth resistor R5 and a sixth light emitting diode D6; the power protection module 203 includes: a fuse F1, an ESD electrostatic tube ESD1 and a rectifier tube D1. The twelfth resistor R12 and the seventh light emitting diode D7 form a charge state indication circuit, and the fifth resistor R5 and the sixth light emitting diode D6 form a discharge state indication circuit.

[0077] Specifically, Figure 4As shown, the first pin, the third pin and the sixth pin of the charge / discharge switch 201 are suspended, the second pin and the fourth pin of the charge / discharge switch 201 are respectively connected to the discharge module 206, the eighth pin of the charge / discharge switch 201 is connected to the input end of the fuse F1, the seventh pin of the charge / discharge switch 201 is connected to the output end of the power conversion module 30, the fifth pin of the charge / discharge switch 201 is connected to the input end of the fifth resistor R5, and the output end of the fifth resistor R5 is grounded through the sixth light-emitting diode D6; the eighth pin of the charge / discharge switch 201 is also connected to the input end of the twelfth resistor R12, and the output end of the twelfth resistor R12 is grounded through the seventh light-emitting diode D7; the output end of the fuse F1 is connected to the input end of the ESD electrostatic tube ESD1, the output end of the ESD electrostatic tube ESD1 is grounded, the input end of the rectifier tube D1 is connected to the output end of the fuse F1, and the output end of the rectifier tube D1 is connected to the charging module 204.

[0078] like Figure 4 As shown, the charge / discharge switch 201 is a dip switch. When it is placed in the middle, neither charging nor discharging occurs, and the charging module 204 and the discharging module 206 do not work; when it is dialed down, it enters the charging mode, and the 5V DC connected to the seventh pin of the charge / discharge switch 201 enters its eighth pin and is transmitted to the power protection module 203 and the charging module 204, and the charging module 204 starts to work; when it is dialed up, it enters the discharging mode, and the fourth pin of the charge / discharge switch 201 outputs a signal to the discharging module 206, and the discharging mode starts to work.

[0079] Specifically, Figure 5 As shown, the charging module 204 includes: a first resistor R1, a first capacitor C1, a fifth capacitor C5, a charging chip U1, a second capacitor C2, a third capacitor C3, a first inductor L1, a third resistor R3, an eighth capacitor C8 and a seventh capacitor C7.

[0080] The first end of the first resistor R1 and the first end of the first capacitor C1 are connected to the output end of the power protection module 203, the second end of the first resistor R1 is grounded through the fifth capacitor C5, and the second end of the first capacitor C1 is grounded; the first pin of the charging chip U1 is connected to the output end of the power protection module 203, the eighth pin of the charging chip U1 is connected to the discharge module 206, the first end of the second capacitor C2 is connected to the eighth pin of the charging chip U1, and the third capacitor C3 and the fourth capacitor C4 are connected in parallel with the second capacitor C2 in sequence; the seventh pin of the charging chip U1 is connected to the battery interface 208 through the first inductor L1, the first end of the third resistor R3 is connected to the second end of the first inductor L1, the second end of the third resistor R3 is respectively connected to the sixth pin of the charging chip U1 and the first end of the eighth capacitor C8, the second end of the eighth capacitor C8 is grounded, and the seventh capacitor C7 is connected in parallel with the series circuit composed of the third resistor R3 and the eighth capacitor C8.

[0081] like Figure 5 As shown, J2 is the battery interface 208 , and VBAT_1 of the charging module 204 is connected to the positive terminal of the battery interface 208 .

[0082] like Figure 6 As shown, the discharge module 206 includes: a seventh resistor R7, a sixth resistor R6, a tenth resistor R10, a second operational amplifier U2B, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a third operational amplifier U3A, a first transistor V1, a second transistor V2, a thirteenth resistor R13, a reference device Z1 and an adjustable resistor R11.

[0083] The negative input terminal of the second operational amplifier U2B is grounded through the tenth resistor R10, the positive input terminal of the second operational amplifier U2B is connected to the connection terminal of the seventh resistor R7 and the reference device Z1, the input terminal of the seventh resistor R7 is connected to the charge / discharge switching switch 201, the sixth resistor R6 is connected between the negative input terminal and the output terminal of the second operational amplifier U2B, the output terminal of the second operational amplifier U2B is connected to the positive input terminal of the third operational amplifier U3A through the eighth resistor R8 and the ninth resistor R9 in sequence, the power supply terminal of the third operational amplifier U3A is connected to the charge / discharge switching switch 201, and the third pin of the reference device Z1 is also connected to the connection terminal of the eighth resistor R8 and the ninth resistor R9.

[0084] A first end of the adjustable resistor R11 is connected to the positive input end of the third operational amplifier U3A, and a third end of the adjustable resistor R11 is grounded; a negative input end of the third operational amplifier U3A is connected to the emitter of the second transistor V2, a ground end of the third operational amplifier U3A is grounded, an output end of the third operational amplifier U3A is connected to the base of the first transistor V1, a collector of the first transistor V1 is connected to the charging module 204, an emitter of the first transistor V1 is connected to the base of the second transistor V2, a collector of the second transistor V2 is connected to the collector of the first transistor V1, and an emitter of the second transistor V2 is grounded via a thirteenth resistor R13.

[0085] like Figure 6 As shown, pin 8 (VLOAD1) of the second operational amplifier U2B is connected to the fourth pin of the charge / discharge switch 201, and the connection end (VOUT_5V_1) between the collector of the first transistor V1 and the collector of the second transistor V2 is connected to the eighth pin of the charging chip U1 in the charging module 204.

[0086] like Figure 7 As shown, the charge and discharge protection module 209 includes: a battery protection chip U21, a first MOS tube U22, a second MOS tube U23, a ninety-fourth resistor R94, a ninety-fifth resistor R95 and a fifty-fifth capacitor.

[0087] The fifth pin of the battery protection chip U21 is connected to the battery interface 208 through the ninety-fifth resistor R95, and the fifth pin of the battery protection chip U21 is also grounded through the fifty-fifth capacitor. The second pin of the battery protection chip U21 is grounded through the ninety-fourth resistor R94. The third pin of the battery protection chip U21 is connected to the fourth pin of the first MOS tube U22 and the sixth pin of the second MOS tube U23. The first pin of the battery protection chip U21 is connected to the sixth pin of the first MOS tube U22 and the fourth pin of the second MOS tube U23; the third pin of the first MOS tube U22 and the first pin of the second MOS tube U23 are grounded.

[0088] The utility model realizes overcharge, over-discharge and over-current protection of the battery by using the battery protection chip HY2116 (i.e. U21) and two groups of NMOS tubes to prevent abnormal conditions from affecting the battery performance and life.

[0089] Furthermore, if Figure 5 As shown, the charge / discharge quantity indicating module 205 includes: a second light-emitting tube D2, a third light-emitting tube D3, a fourth light-emitting tube D4 and a fifth light-emitting tube D5.

[0090] The positive electrode of the second light-emitting tube D2 is connected to the second pin of the charging chip U1, the negative electrode of the second light-emitting tube D2 is connected to the fourth pin of the charging chip U1, the negative electrode of the third light-emitting tube D3 is connected to the second pin of the charging chip U1, the positive electrode of the third light-emitting tube D3 is connected to the fourth pin of the charging chip U1, the positive electrode of the fourth light-emitting tube D4 is connected to the third pin of the charging chip U1, the negative electrode of the fourth light-emitting tube D4 is connected to the fourth pin of the charging chip U1, the negative electrode of the fifth light-emitting tube D5 is connected to the third pin of the charging chip U1, and the positive electrode of the fifth light-emitting tube D5 is connected to the fourth pin of the charging chip U1.

[0091] like Figure 8 As shown, it is a circuit schematic diagram of the functional interface provided by the utility model.

[0092] like Figure 8 As shown in the figure, J1 is the 5V power input port. By connecting J1 to the power output port J9, the 5V signal can be connected. J3 and J4 are expansion ports. Through these two cascade ports, multiple devices can be cascaded. J5 is the cooling fan port. The cooling fan can be connected through J5. J6 is the digital voltage and current meter port. Through J6, the digital voltage and current meter can be connected, so that the discharge voltage and current can be monitored and displayed in real time during discharge, which is convenient for setting and adjusting the constant current.

[0093] Specifically, Figures 3 to 8As shown in the figure, the AC 220V is connected to the device through the mains interface, and then the power conversion module 30 converts the incoming AC 220V high voltage into the stable 5V DC required inside the device. After passing through the charge / discharge switch 201, the weak current power supply entering the device is protected by the power protection module 203 to prevent abnormal conditions such as short circuit, reverse connection, and electrostatic surge impact from damaging the subsequent stages of the device.

[0094] Specifically, when the charge / discharge switch 201 is switched to the charging mode, the charging module 204 starts to work and charges the battery in a standard manner. At this time, the seventh light-emitting diode D7 lights up, and the current charging state is indicated by the red light. At the same time, the second light-emitting diode D2, the third light-emitting diode D3, the fourth light-emitting diode D4, and the fifth light-emitting diode D5 light up in sequence, indicating that the charging power state is C < 25%, 25% ≤ C < 50%, 50% ≤ C < 75%, and C = 100% respectively. When the charge / discharge switch 201 is switched to the discharging mode, the discharging module 206 starts to work and discharges the battery at a constant current. At this time, the sixth light-emitting diode D6 lights up, and the current discharging state is indicated by the white light. At the same time, the fifth light-emitting diode D5, the fourth light-emitting diode D4, the third light-emitting diode D3, and the second light-emitting diode D2 turn off in sequence, indicating that the remaining battery power is 75% ≤ C, 50% ≤ C < 75%, 25% ≤ C < 50%, and 0% < C < 3% respectively. Moreover, during the discharging process, the digital display voltage and ammeter also monitors and displays the discharging voltage and current at the same time to facilitate setting and adjusting the constant current. At the same time, the cooling fan also dissipates heat from the power transistor in the discharging module 206 to prevent damage to the device caused by the high heat generated during discharging.

[0095] The wireless conference unit battery activation management device of the utility model is powered by 5V DC. After the power protection circuit (composed of fuse F1, ESD electrostatic tube ESD1, and rectifier tube D1), it can effectively prevent the damage to the device's rear stage caused by abnormal conditions such as short circuit, reverse connection, and electrostatic surge impact. The charging circuit is powered by 5V, and after the SM5308 (step-down chip U4) step-down process, the stable VBAT_1 is output to charge the battery, which can realize 4.2V constant voltage trickle charging to effectively protect the battery performance. Among them, D2, D3, D4, and D5 are used for charge / discharge power indication, indicating different power states respectively. When the charge / discharge switching switch 201 is switched to the discharge mode, the discharge module 206, the digital voltage and current meter, and the cooling fan start working to realize constant current discharge of the battery. When switched to discharge mode, SM5308 (charging chip U1) starts the internal boost circuit, processes the battery voltage connected to VBAT_1 and outputs it to the discharge module 206 through VOUT_5V_1. The discharge module 206 is composed of an operational amplifier to form a current series negative feedback circuit, which drives the power tube with a constant small current to achieve the function of electronic load discharge. Among them, R11 is an adjustable resistor R11, which can set the size of constant current discharge to meet the discharge requirements of batteries of different specifications.

[0096] The wireless conference unit battery activation management device of the utility model has the following advantages:

[0097] 1. Efficient and concise circuit design: Under the premise of meeting the normal battery charging and discharging activation management requirements, the circuit design is efficient and concise, reducing manufacturing costs.

[0098] 2. Low-cost function realization: The device can realize its function with only low hardware equipment cost, which is conducive to large-scale application and promotion.

[0099] 3. Activate multiple batteries at the same time: The device can activate and manage 10 batteries at the same time, improving work efficiency.

[0100] 4. Strong scalability: Through the cascade expansion interface, users can connect multiple devices as needed, thereby expanding the number of batteries activated at the same time and further saving factory time costs.

[0101] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot limit the protection scope of the utility model. All equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A wireless conference unit battery activation management device, characterized in that: include: A power switch, a mains interface module connected to the power switch, a power conversion module connected to the mains interface module, and a multi-channel battery activation control circuit connected to the power conversion module; Each of the battery activation control circuits comprises: a charge / discharge switch, a charging module, a discharging module and a charge / discharge protection module; The power switch is used to control the power on and off of the wireless conference unit battery activation management device; The mains interface module is used to access AC power to input a power signal to the wireless conference unit battery activation management device; The power conversion module is used to convert the power signal into a DC signal; The charge / discharge switch is used to perform switching control on the charging module and the discharging module, so as to control the wireless conference unit battery activation management device to perform charging or discharging of the wireless conference unit battery; The charging module is used to perform standard charging on the battery of the wireless conference unit according to the switching of the charge / discharge switch; The discharge module is used to perform constant current discharge on the battery of the wireless conference unit according to the switching of the charge / discharge switch; The charge and discharge protection module performs charge and discharge protection on the battery of the wireless conference unit when the charging module or the discharging module is working.

2. The wireless conference unit battery activation management device according to claim 1, characterized in that: Each of the battery activation control circuits further includes: a power protection module and a charge / discharge status indication module; The power protection module is disposed between the charge / discharge switch and the charging module, and is used to perform power protection on the wireless conference unit battery activation management device; The charge / discharge status indication module is connected to the charge / discharge switching switch and is used to perform charge status indication or discharge status indication according to the switching of the charge / discharge switching switch.

3. The wireless conference unit battery activation management device according to claim 2, characterized in that: Each of the battery activation control circuits further includes: a charge / discharge capacity indication module; The charge / discharge quantity indication module is connected to the charge module and the discharge module, and is used for indicating the charge / discharge quantity when the charge module or the discharge module is working.

4. The wireless conference unit battery activation management device according to claim 3, characterized in that: Each of the battery activation control circuits further includes: a battery interface, a discharge information display module and a heat dissipation module; The battery interface is respectively connected to the charging module, the discharging module and the charging and discharging protection module, and is used to connect the charging module, the discharging module and the charging and discharging protection module to the battery of the wireless conference unit; The discharge information display module is connected to the discharge module and is used to display the discharge information when the discharge module is working; The heat dissipation module is connected to the discharge module and is used for dissipating heat for the power tube in the discharge module when the discharge module is working.

5. The wireless conference unit battery activation management device according to claim 1, characterized in that: The power conversion module includes: a step-down circuit, a transformer and a power output port; the power output port is the output end of the power conversion module; The input end of the step-down circuit is connected to the mains interface module, the output end of the step-down circuit is connected to the input end of the transformer, and the output end of the transformer is connected to the power output port.

6. The wireless conference unit battery activation management device according to claim 2, characterized in that: The charge / discharge state indication module includes: a twelfth resistor, a seventh light emitting diode, a fifth resistor and a sixth light emitting diode; the power protection module includes: a fuse, an ESD electrostatic tube and a rectifier tube; The first pin, the third pin and the sixth pin of the charge / discharge switch are suspended, the second pin and the fourth pin of the charge / discharge switch are respectively connected to the discharge module, the eighth pin of the charge / discharge switch is connected to the input end of the fuse, the seventh pin of the charge / discharge switch is connected to the output end of the power conversion module, the fifth pin of the charge / discharge switch is connected to the input end of the fifth resistor, and the output end of the fifth resistor is grounded through the sixth light-emitting diode; the eighth pin of the charge / discharge switch is also connected to the input end of the twelfth resistor, and the output end of the twelfth resistor is grounded through the seventh light-emitting diode; The output end of the fuse is connected to the input end of the ESD electrostatic tube, the output end of the ESD electrostatic tube is grounded, the input end of the rectifier tube is connected to the output end of the fuse, and the output end of the rectifier tube is connected to the charging module.

7. The wireless conference unit battery activation management device according to claim 4, characterized in that: The charging module includes: a first resistor, a first capacitor, a fifth capacitor, a charging chip, a second capacitor, a third capacitor, a fourth capacitor, a first inductor, a third resistor, an eighth capacitor and a seventh capacitor; The first end of the first resistor and the first end of the first capacitor are connected to the output end of the power protection module, the second end of the first resistor is grounded through the fifth capacitor, and the second end of the first capacitor is grounded; The first pin of the charging chip is connected to the output end of the power protection module, the eighth pin of the charging chip is connected to the discharge module, the first end of the second capacitor is connected to the eighth pin of the charging chip, and the third capacitor and the fourth capacitor are sequentially connected in parallel with the second capacitor; The seventh pin of the charging chip is connected to the battery interface through the first inductor, the first end of the third resistor is connected to the second end of the first inductor, the second end of the third resistor is respectively connected to the sixth pin of the charging chip and the first end of the eighth capacitor, the second end of the eighth capacitor is grounded, and the seventh capacitor is connected in parallel to the series circuit composed of the third resistor and the eighth capacitor.

8. The wireless conference unit battery activation management device according to claim 1, characterized in that: The discharge module includes: a seventh resistor, a sixth resistor, a tenth resistor, a second operational amplifier, an eighth resistor, a ninth resistor, a third operational amplifier, a first triode, a second triode, a thirteenth resistor, a reference device and an adjustable resistor; The negative input terminal of the second operational amplifier is grounded through the tenth resistor, the positive input terminal of the second operational amplifier is connected to the connection terminal of the seventh resistor and the reference device, the input terminal of the seventh resistor is connected to the charge / discharge switch, the sixth resistor is connected between the negative input terminal and the output terminal of the second operational amplifier, the output terminal of the second operational amplifier is connected to the positive input terminal of the third operational amplifier through the eighth resistor and the ninth resistor in sequence, the power supply terminal of the third operational amplifier is connected to the charge / discharge switch, and the third pin of the reference device is also connected to the connection terminal of the eighth resistor and the ninth resistor; The first end of the adjustable resistor is connected to the positive input end of the third operational amplifier, and the third end of the adjustable resistor is grounded; the negative input end of the third operational amplifier is connected to the emitter of the second transistor, the ground end of the third operational amplifier is grounded, the output end of the third operational amplifier is connected to the base of the first transistor, the collector of the first transistor is connected to the charging module, the emitter of the first transistor is connected to the base of the second transistor, the collector of the second transistor is connected to the collector of the first transistor, and the emitter of the second transistor is grounded through the thirteenth resistor.

9. The wireless conference unit battery activation management device according to claim 4, characterized in that: The charge and discharge protection module includes: a battery protection chip, a first MOS tube, a second MOS tube, a ninety-fourth resistor, a ninety-fifth resistor and a fifty-fifth capacitor; The fifth pin of the battery protection chip is connected to the battery interface through the ninety-fifth resistor, the fifth pin of the battery protection chip is also grounded through the fifty-fifth capacitor, the second pin of the battery protection chip is grounded through the ninety-fourth resistor, the third pin of the battery protection chip is connected to the fourth pin of the first MOS tube and the sixth pin of the second MOS tube, the first pin of the battery protection chip is connected to the sixth pin of the first MOS tube and the fourth pin of the second MOS tube; the third pin of the first MOS tube and the first pin of the second MOS tube are grounded.

10. The wireless conference unit battery activation management device according to claim 7, characterized in that: The charge / discharge quantity indication module comprises: a second light emitting tube, a third light emitting tube, a fourth light emitting tube and a fifth light emitting tube; The positive electrode of the second light-emitting tube is connected to the second pin of the charging chip, the negative electrode of the second light-emitting tube is connected to the fourth pin of the charging chip, the negative electrode of the third light-emitting tube is connected to the second pin of the charging chip, the positive electrode of the third light-emitting tube is connected to the fourth pin of the charging chip, the positive electrode of the fourth light-emitting tube is connected to the third pin of the charging chip, the negative electrode of the fourth light-emitting tube is connected to the fourth pin of the charging chip, the negative electrode of the fifth light-emitting tube is connected to the third pin of the charging chip, and the positive electrode of the fifth light-emitting tube is connected to the fourth pin of the charging chip.

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