CN104242385A - Battery pack, charger, charging system, discharging device and discharging system - Google Patents

Abstract

The invention provides a battery pack, a charger, a charging system, a discharging device and a discharging system. The battery pack comprises a battery cell group with a battery positive end and a battery negative end, a battery pack microprocessor connected between the battery positive end and the battery negative end, and a voltage detection circuit used for collecting the voltage of each battery cell; the temperature detection circuit is used for acquiring the temperature of the electric core group; the balance circuit is used for balancing the pressure difference between the battery cores under the control of the battery pack microprocessor; an indicator for displaying the current capacity and/or the current operating state of the battery pack; the battery pack microprocessor controls the bidirectional communication control circuit to perform information interaction with an external charger or a discharging device through the bidirectional communication interface; the voltage detection circuit, the balance circuit and the temperature detection circuit are respectively and electrically connected with the electric core group and the battery pack microprocessor, and the bidirectional communication control circuit and the indicator are respectively and electrically connected with the battery pack microprocessor. When the battery pack is charged or discharged, the battery pack can be well matched with a charger or a discharging device.

Description

A battery pack, a charger, a charging system, a discharging device, and a discharging system

technical field

The invention relates to the field of battery charging and discharging, in particular to a battery pack, a charger, a charging system, a discharging device and a discharging system.

Background technique

At present, the structure of the existing battery pack charging and discharging system is shown in Figure 1 and Figure 2. When charging, the discharge control FET (Field Effect Transistor, Field Effect Transistor) of the battery pack is turned on, and the battery detection and control circuit detects each cell in the battery pack. The cell voltage and the resistance value of NTC (Negative Temperature Coefficient Thermistor) are used to calculate the temperature of the battery pack, the charging current, etc. When the temperature of the battery pack exceeds the allowable setting range of the charging temperature or any cell exceeds the maximum limit When the charging voltage is low, or when the charging current exceeds the maximum allowable charging current set by the battery pack, the charging control FET is turned off, otherwise the charger will turn on the charging control FET.

The charge control FET of the battery pack is turned on during discharge. The battery detection and control circuit detects the voltage of each cell and the resistance of NTC to calculate the temperature of the battery pack, charging current, etc. When the cell temperature exceeds the allowable setting range of the discharge temperature or the voltage of any cell is lower than the limit discharge voltage, or the discharge current exceeds the maximum allowable discharge current set by the battery pack, the discharge control FET is turned off, otherwise the discharge control is turned on FET.

With the above existing battery pack charge and discharge system structure, the charger or discharge device cannot know the characteristics of the battery pack, such as the maximum limit voltage, current, allowable range of charging temperature and the voltage of each battery cell during charging, so different types of The battery cells, the charging characteristics of the charger and the discharge characteristics of the discharge device are consistent, so it is impossible to achieve a good match between the battery pack and the charger or discharge device, so the maximum service life of the battery pack cannot be guaranteed. At the same time, the existing battery packs are equipped with charge and discharge protection devices such as charge and discharge control FETs, which lead to high design costs and complex circuit design of the battery pack, and poor overall thermal design of the battery pack and the system.

Contents of the invention

The present invention aims to solve the technical problem of good matching between the battery pack and the charger or discharge device in the prior art and the design cost of the battery pack is high and the circuit design is complicated, and provides a battery pack that can be well matched with the charger or discharge device, And the battery pack with low design cost.

The present invention provides a battery pack, including a cell pack with a positive terminal and a negative terminal of the battery, a battery pack microprocessor connected between the positive terminal and the negative terminal of the battery, and a voltage detection circuit for collecting each Save the voltage of the battery cell, and send the collected cell voltage to the battery pack microprocessor;

The temperature detection circuit is used to collect the temperature of the battery pack, and send the collected temperature of the battery pack to the battery pack microprocessor;

A balancing circuit to balance the voltage difference between the cells under the control of the battery pack microprocessor;

Indicators for displaying the current capacity and/or current working status of the battery pack;

The two-way communication control circuit has a two-way communication interface, and the battery pack microprocessor controls the two-way communication control circuit to perform information interaction with an external charger or discharge device through the two-way communication interface;

The voltage detection circuit, the balance circuit, and the temperature detection circuit are respectively electrically connected to the battery pack microprocessor and the battery pack microprocessor, and the two-way communication control circuit and the indicator are respectively electrically connected to the battery pack microprocessor.

Further, the battery pack microprocessor also stores the information of the battery pack, including battery brand, battery capacity, number of battery cells in series and parallel, maximum charging limit voltage, constant voltage charging voltage point information, quantity of battery indicator lights, Maximum charge current, maximum discharge current and time conditions, termination discharge current and voltage conditions, battery voltage conditions, temperature limit conditions, charging times information, product production information, product application and protection information, and software protocols.

The embodiment of the present invention also provides a charger, including the positive terminal of the charger, the negative terminal of the charger and the microprocessor of the charger, and also includes,

The switching power supply has an AC input terminal for inputting AC power;

The charging control circuit is used to control the charging work of the charger under the control of the charger microprocessor;

A voltage control device for controlling the charging output voltage of the charger under the control of the charger microprocessor;

A current control device for controlling the charging output current of the charger under the control of the charger microprocessor;

The voltage acquisition device is used to acquire the current output voltage of the charger and send it to the charger microprocessor;

The current acquisition device is used to acquire the current output current of the charger and send it to the charger microprocessor;

An indicator for displaying the working status of the charger under the control of the charger microprocessor;

The two-way communication control circuit has a single terminal interface for two-way communication, and the charger microprocessor controls the two-way communication control circuit to perform information interaction with the external battery pack through the two-way communication interface;

The switching power supply, the charging control circuit and the current acquisition device are connected in series between the positive terminal and the negative terminal of the charger, the microprocessor of the charger is connected between the positive terminal and the negative terminal of the charger, and the voltage control The device and the current control device are respectively electrically connected to the switching power supply and the charger microprocessor, the charging control circuit, the current acquisition device, the indicator, the two-way communication control circuit and the switching power supply are respectively electrically connected to the charger microprocessor, and the voltage acquisition device is respectively Electrically connected to the charger microprocessor and the positive terminal of the charger;

Among them, the microprocessor of the charger controls the two-way communication control circuit to perform information interaction with the external battery pack through the communication interface, and controls the charging output voltage of the charger in real time according to the information of the battery pack, the current output voltage of the charger, and the current output current. Current size.

An embodiment of the present invention also provides a charging system, including a battery pack and a charger connected to the battery pack, the battery pack includes a battery pack with a positive terminal and a negative terminal of the battery, and the battery is connected between the positive terminal and the negative terminal of the battery. The battery detection and control circuit between the negative terminals, and the two-way communication interface connected to the battery detection and control circuit, the charger includes a positive terminal of the charger, a negative terminal of the charger and a battery connected between the positive terminal and the negative terminal of the charger. A charging detection and control circuit capable of inputting alternating current, a communication interface electrically connected to the charging detection and control circuit, the positive terminal of the charger is electrically connected to the positive terminal of the battery pack, and the negative terminal of the charger is connected to the negative terminal of the battery pack electrical connection, the communication interface of the charger is electrically connected with the two-way communication interface of the battery pack;

The battery detection and control circuit performs information interaction with the charging detection and control circuit, and according to the cell capacity of the battery pack, the number of cells connected in series and parallel, the maximum charging limit voltage, the constant voltage charging voltage point information, the number of power indicator lights, the maximum Charging current information, current battery temperature, current cell charging voltage information, output current information, temperature limit conditions and software protocol to control the charging output voltage and current of the charger in real time. Further, the battery detection and control circuit includes a voltage detection circuit, a temperature detection circuit, a balance circuit, a battery pack microprocessor, a two-way communication control circuit and an indicator;

The voltage detection circuit, the balance circuit, and the temperature detection circuit are electrically connected to the battery pack microprocessor and the battery pack microprocessor respectively, and the two-way communication control circuit and the indicator of the battery detection and control circuit are respectively connected to the battery pack microprocessor. The two-way communication control circuit is also connected to the two-way communication interface of the battery pack.

Further, the charging detection and control circuit includes a switching power supply for inputting alternating current, a charger microprocessor, a charging control circuit, a voltage control device, a current control device, a voltage collection device, a current collection device, an indicator, a two-way communication Control circuit;

The switching power supply, the charging control circuit and the current acquisition device are connected in series between the positive terminal and the negative terminal of the charger, the charger microprocessor is connected to the positive terminal and the negative terminal of the charger, the voltage control device, The current control device is electrically connected with the switching power supply and the charger microprocessor, the charging control circuit, the current acquisition device, the indicator, the two-way communication control circuit and the switching power supply are respectively electrically connected with the charger microprocessor, and the voltage acquisition device is respectively connected with the charging The microprocessor and the positive terminal of the charger are electrically connected, and the two-way communication control circuit of the charging detection and control circuit is also electrically connected with the communication interface of the charger.

An embodiment of the present invention also provides a discharge device, including a DC motor, a microprocessor for the discharge device, and the DC motor is connected to the positive and negative poles of the external battery pack through a reversing switch. The discharge device also includes:

The voltage detection device is used to collect the voltage of the battery pack under the control of the discharge device microprocessor;

The speed detection device is used to collect the position information of the current speed sensor of the DC motor under the control of the microprocessor of the discharge device;

The current detection device is used to collect the current operating current of the DC motor under the control of the microprocessor of the discharge device;

The speed control FET is used to control the operating current of the DC motor under the control of the microprocessor of the discharge device;

An indicator for displaying the working status of the discharge device under the control of the discharge device microprocessor;

The two-way communication control circuit has a single terminal interface for two-way communication, and the microprocessor of the discharge device controls the two-way communication control circuit to perform information interaction with the external battery pack through the two-way communication interface;

The circuit formed by the DC motor and the external battery pack is also connected in series with the source and drain of the speed regulation control FET, a current detection device and a controllable switch, and one end of the microprocessor of the discharge device is connected to the connection of the speed regulation control FET. The grid is electrically connected, the other end is electrically connected to the positive end of the battery pack through a controllable switch, one end of the voltage detection device is electrically connected to the microprocessor of the discharge device, and the other end is electrically connected to the positive end of the battery pack through the controllable switch , the speed detection device, the current detection device and the indicator are respectively electrically connected to the microprocessor of the discharge device, and the microprocessor of the discharge device also communicates with the battery pack through a two-way communication control device;

Among them, the microprocessor of the discharge device controls the two-way communication control circuit to exchange information with the battery pack, and according to the voltage of the battery pack, the temperature of the battery pack, the current speed of the DC motor, the current operating current of the DC motor, the maximum discharge current and time conditions , End discharge current and voltage conditions, temperature limit conditions and the position control of the controllable switch The speed control FET controls the working current of the DC motor in real time.

Embodiments of the present invention also provide a discharge system, including a battery pack and a discharge device electrically connected to the battery pack, the battery pack includes a battery pack with a positive terminal and a negative terminal of the battery, and the battery pack is connected between the positive terminal and the negative terminal of the battery. The battery detection and control circuit between the extremes, and the two-way communication interface connected with the battery detection and control circuit, the discharge device includes a DC motor, a discharge detection and control circuit, a speed control FET, and the DC motor communicates with the battery through a reversing switch. The battery positive and negative terminals of the battery pack are electrically connected, the circuit formed by the DC motor and the battery pack is also connected in series with the source and drain of the speed control FET, and the discharge detection and control circuit is connected to Between the positive terminal of the battery and the negative terminal of the battery, the discharge detection and control circuit is also connected to the gate of the speed control FET and the bidirectional communication interface of the battery pack;

The battery detection and control circuit performs information interaction with the discharge detection and control circuit, and controls speed regulation, maximum discharge current and time according to the voltage of the battery pack, the temperature of the battery pack, the current speed of the DC motor, and the current operating current of the DC motor Conditions, termination discharge current and voltage conditions, temperature limit conditions and controllable switch position control FET to control the working current of the DC motor in real time. Further, the battery detection and control circuit includes a voltage detection circuit, a temperature detection circuit, a balance circuit, a battery pack microprocessor, a two-way communication control circuit and an indicator;

The voltage detection circuit, the balance circuit, and the temperature detection circuit are electrically connected to the battery pack microprocessor and the battery pack microprocessor respectively, and the two-way communication control circuit and the indicator of the battery detection and control circuit are respectively connected to the battery pack microprocessor. The two-way communication control circuit is also connected to the two-way communication interface of the battery pack.

Further, the discharge detection and control circuit includes a discharge device microprocessor, a controllable switch, a voltage detection device, a speed detection device, a two-way communication control device, a current detection device and an indicator;

The DC motor is electrically connected to the positive terminal and the negative terminal of the battery pack through a reversing switch, and the circuit formed by the DC motor and the battery pack is also connected in series with the source and drain of the speed control FET, and the current detection device and a controllable switch, one end of the microprocessor of the discharge device is connected to the gate of the speed control FET, the other end is electrically connected to the positive terminal of the battery pack through a controllable switch, one end of the voltage detection device is connected to the microprocessor of the discharge device The other end is electrically connected to the positive terminal of the battery pack through a controllable switch. The speed detection device, current detection device and indicator are respectively electrically connected to the microprocessor, and the microprocessor is also connected through two-way communication. The control device is electrically connected with the bidirectional communication interface of the battery pack.

In the above technical solution, by setting a two-way communication interface in the battery pack, the charger or discharge device can communicate with the battery pack of the battery pack in real time when the battery pack is charging or discharging, and understand the characteristics of the battery pack in real time, so that The battery pack can be well matched with the charger or discharge device, thus effectively ensuring the maximum service life of the battery pack. At the same time, the battery pack of the present invention does not use the structure of charge and discharge protection devices such as charge and discharge control FETs, which effectively reduces the complexity of the internal circuit design of the battery pack, and the performance of the battery pack and the overall thermal design of the system is better.

Description of drawings

Fig. 1 is a structural schematic diagram of a charging system with a battery pack in the prior art;

Fig. 2 is a structural schematic diagram of a discharge system with a battery pack in the prior art;

Fig. 3 is a structural block diagram of a battery pack according to an embodiment of the present invention;

Fig. 4 is a structural block diagram of a charger according to an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a charging system according to an embodiment of the present invention;

Fig. 6 is a structural block diagram of a discharge device according to an embodiment of the present invention;

Fig. 7 is a schematic structural diagram of a discharge system according to an embodiment of the present invention.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

As shown in FIG. 3 , an embodiment of the present invention provides a battery pack 10, including a cell pack 11 having a positive terminal 13 and a negative terminal 14 of the battery, and a battery connected between the positive terminal 13 and the negative terminal 14 of the battery Package microprocessor 121;

It also includes a voltage detection circuit 122 for collecting the voltage of each cell, and sending the collected cell voltage to the battery pack microprocessor 121;

The temperature detection circuit 124 is used to collect the temperature of the battery pack 11, and send the collected temperature of the battery pack to the battery pack microprocessor 121;

The balance circuit 123 is used to balance the voltage difference between the cells under the control of the battery pack microprocessor 121;

Indicator 126, used to display the current capacity and/or current working state of the battery pack 10;

The two-way communication control circuit 125 has a two-way communication interface 14, and the battery pack microprocessor 121 controls the two-way communication control circuit 125 to exchange information with an external charger or discharge device through the two-way communication interface 14.

The voltage detection circuit 122, the balance circuit 123, and the temperature detection circuit 124 are electrically connected to the battery pack 11 and the battery pack microprocessor 121 respectively, and the two-way communication control circuit 125 and the indicator 126 are respectively connected to the battery pack microprocessor. device 121 is electrically connected.

Further, when the battery pack 10 leaves the factory, a large amount of characteristic information and application information of the battery pack have been written in the battery pack microprocessor 121. The characteristic information includes the battery brand, battery capacity, number of batteries in series and parallel, maximum Charging limit voltage, constant voltage charging voltage point information, number of battery indicator lights, maximum charging current, maximum discharge current and time conditions, termination discharge current and voltage conditions, power voltage conditions, temperature limit conditions, charging times information, product production information, Product application and protection information and software protocols, etc. The application information mainly includes the temperature of the battery cells collected when the battery pack is working, the voltage of each battery cell, and the information received from the charger or discharge device, etc.

When the two-way communication control circuit 125 of the battery pack 10 detects one or more specific pulse signals, the battery pack microprocessor 121 is woken up, the battery pack microprocessor 121 starts and controls the voltage detection circuit 122 to collect the voltage of each cell, The temperature detection circuit 124 is controlled to collect the temperature of the battery core.

If the battery pack microprocessor 121 receives the order or information of the charger or discharge device through the two-way communication control circuit 125, the battery pack microprocessor 121 feeds back the corresponding information to the charger or discharge device, while the battery pack microprocessor 121 Calculate the voltage difference of the battery cells, and start the cell balancing device to balance the voltage difference between the cells when the pressure difference reaches the balance voltage point set by the battery pack microprocessor 121, if the battery pack is receiving the signal of the external charger or discharge device When timeout occurs, all devices in the battery pack 10 automatically enter a dormant state.

Further, the battery pack can also wake up the battery pack microprocessor 121 through the button in the indicator 126. After the battery pack microprocessor 121 is woken up, the voltage detection circuit 122 is started to collect the voltage of each cell, and the temperature detection circuit 124 is started to collect the voltage of each cell. core temperature, and display the current battery capacity or indicate the status of the battery pack 10 in the indicator 126.

As shown in FIG. 4 , an embodiment of the present invention also provides a charger 20, including a charger positive terminal, a charger negative terminal and a charger microprocessor 221, and also includes:

The switching power supply 229 has an AC input terminal 23 for inputting AC power;

The charging control circuit 226 is used to control the charging operation of the charger 20 under the control of the charger microprocessor 221;

A voltage control device 227, configured to control the charging output voltage of the charger 20 under the control of the charger microprocessor 221;

The current control device 228 is used to control the charging output current of the charger 20 under the control of the charger microprocessor 221;

The voltage collecting device 222 is used to collect the current output voltage of the charger 20 and send it to the charger microprocessor 221;

The current collecting device 225 is used to collect the current output current of the charger 20 and send it to the charger microprocessor 221;

The indicator 224 is used to display the working state of the charger 20 under the control of the charger microprocessor 221;

A two-way communication control circuit 223, which is provided with a communication interface, and the charger microprocessor 221 controls the two-way communication control circuit 223 to perform information interaction with the external battery pack through the two-way communication interface;

The switching power supply 229, the charging control circuit 226 and the current acquisition device 225 are connected in series between the positive terminal and the negative terminal of the charger 20, while the switching power supply 229 is also connected to the AC input terminal 23, and the charger microprocessor 221 is connected to Between the positive terminal and the negative terminal of the charger, the voltage control device 227 and the current control device 228 are electrically connected to the switching power supply 229 and the charger microprocessor 221 respectively, and the charging control circuit 226 is connected to the switching power supply 229 and the charger respectively. The microprocessor 221 is electrically connected to the positive terminal of the charger, the current acquisition device 225, the indicator 224, the two-way communication control circuit 223 and the switching power supply 229 are respectively electrically connected to the charger microprocessor 221, and the voltage acquisition device 222 is respectively connected to the charger microprocessor. The processor 221 is electrically connected to the positive terminal of the charger;

Wherein, the charger microprocessor 221 controls the two-way communication control circuit 223 to perform information interaction with the external battery pack 10 through the communication interface, and controls the charger in real time according to the information of the battery pack 10, the current output voltage of the charger 20, and the current output current. 20 charging output voltage and current.

The charger 20 can be connected to an AC working voltage of 110V-240V. When the charger microprocessor 221 is powered on, all external devices are initialized to work in the default state, and then the charger microprocessor 221 detects the battery pack 10 through the two-way communication control circuit 223. Whether it is plugged in or not, the voltage acquisition device 222 is controlled to collect the output voltage of the positive terminal of the charger 20 , and the current collection device 225 is controlled to collect the charging current output by the charger 20 . The charger microprocessor 221 performs calculations to control the voltage control device 227, the current control device 228, and the charging control circuit based on the information exchanged by the two-way communication control circuit 223, the voltage information collected by the voltage collection device 222, and the current information collected by the current collection device 225. 226 and indicator 224 work.

As shown in FIG. 3 , FIG. 4 and FIG. 5 , an embodiment of the present invention also provides a charging system, including a battery pack 10 and a charger 20 connected to the battery pack 10 , the battery pack 10 includes a battery positive terminal 13 and the battery pack 11 of the negative terminal 15, the battery detection and control circuit 12 connected between the positive terminal 13 and the negative terminal 15 of the battery, the bidirectional communication interface 14 connected with the battery detection and control circuit 12, the charging The charger 20 includes a positive terminal of the charger, a negative terminal of the charger, a charging detection and control circuit 22 connected between the positive terminal and the negative terminal of the charger, which can input alternating current, and a communication interface electrically connected to the charging detection and control circuit 22, so The positive end of the charger is electrically connected to the positive end 13 of the battery pack, the negative end of the charger is electrically connected to the negative end 15 of the battery pack, and the communication interface of the charger is electrically connected to the two-way communication interface 14 of the battery pack;

The battery detection and control circuit 12 performs information interaction with the charging detection and control circuit 22, and according to the cell capacity of the battery pack 10, the number of cells connected in series and parallel, the maximum charging limit voltage, software protocol, the number of power indicator lights, and the current charging The temperature, the maximum charging current information, the current charging voltage information of the cell, the current output voltage information of the charger, the output current information, the temperature limit condition and the software protocol control the charging output voltage and current of the charger 20 in real time.

Specifically, the battery detection and control circuit 12 includes a voltage detection circuit 122, a temperature detection circuit 124, a balance circuit 123, a battery pack microprocessor 121, a two-way communication control circuit 125 and an indicator 126; the voltage detection circuit 122, The balance circuit 123 and the temperature detection circuit 124 are electrically connected to the battery pack 11 and the battery pack microprocessor 121 respectively, and the two-way communication control circuit 125 and the indicator 126 of the battery detection and control circuit 12 are respectively connected to the battery pack microprocessor. The device 121 is electrically connected, and the bidirectional communication control circuit 125 is also connected to the bidirectional communication interface 14 of the battery pack 10 .

The charging detection and control circuit 22 includes a switching power supply 229 for inputting alternating current, a charger microprocessor 221, a charging control circuit 226, a voltage control device 227, a current control device 228, a voltage acquisition device 222, a current acquisition device 225, Indicator 224, two-way communication control circuit 223. The switching power supply 229, the charging control circuit 226 and the current acquisition device 225 are connected in series between the positive terminal and the negative terminal of the charger 20, while the switching power supply 229 is also connected to the AC input terminal 23, and the charger microprocessor 221 is connected to At the positive terminal and the negative terminal of the charger, the voltage control device 227 and the current control device 228 are electrically connected to the switching power supply 229 and the charger microprocessor 221 respectively, and the charging control circuit 226 is connected to the switching power supply 229 and the charger microprocessor respectively. The device 221 is electrically connected to the positive terminal of the charger, the current acquisition device 225, the indicator 224, the two-way communication control circuit 223 and the switching power supply 229 are respectively electrically connected to the charger microprocessor 221, and the voltage acquisition device 222 is respectively connected to the charger microprocessor. 221 is electrically connected to the positive terminal of the charger, and the two-way communication control circuit 223 of the charging detection and control circuit 22 is also electrically connected to the communication interface of the charger 20 .

The specific working process of the charging system according to an embodiment of the present invention is as follows:

When the charger 20 detects that the battery pack 10 is inserted, the microprocessor 221 of the charger 20 will send one or more specific pulse signals to wake up the microprocessor 121 of the battery pack 10, and when the battery pack microprocessor 121 detects the specific pulse signal, the microprocessor 121 is woken up, the microprocessor 121 starts and controls the voltage detection circuit 122 to collect the voltage of each cell, controls the temperature detection circuit 124 to collect the temperature of the cell, and feeds back relevant information to the charger 20, Specifically:

The charger microprocessor 221 sends a battery characteristic command to the battery pack 10 through the two-way communication control circuit 223 of the charger, and the battery pack 10 feeds back the capacity information of the battery cell and the series and parallel connection information of the battery cell to the battery pack 10 according to the battery characteristic command. The two-way communication control circuit 223 of the charger 20 is described above.

The charger microprocessor 221 sends the battery characteristic command 2 to the battery pack 10 through the two-way communication control circuit 223 of the charger, and the battery pack 10 feeds back the maximum charging limit voltage information of the battery pack 10 according to the battery characteristic command two, and the two-way communication control circuit 223 receives The battery pack 10 feeds back the maximum charging limit voltage information.

The charger microprocessor 221 sends the battery characteristic command 3 to the battery pack 10 through the two-way communication control circuit 223 of the charger, and the battery pack 10 feeds back the software protocol information of the battery pack 10 according to the battery characteristic command 3, and the two-way communication control circuit 223 receives the battery pack 10 Feedback software protocol information.

The charger microprocessor 221 sends the battery characteristic command 223 to the battery pack 10 through the two-way communication control circuit 223 of the charger, and the battery pack 10 feeds back the number of indicator lights of the battery pack 10 according to the battery characteristic command 223, and the two-way communication control circuit 223 receives The number of battery pack indicators fed back by the battery pack 10.

The charger microprocessor 221 sends the battery characteristic command 5 to the battery pack 10 through the two-way communication control circuit 223 of the charger. 223 receives the threshold voltage for turning on of each indicator light fed back by the battery pack 10 .

The charger microprocessor 221 sends the battery characteristic command 6 to the battery pack 10 through the two-way communication control circuit 223 of the charger. For charging current information, the two-way communication control circuit 223 receives the charging operating temperature of the battery cell fed back by the battery pack and the maximum allowable charging current information at different temperatures.

The charger microprocessor 221 sends the battery application command 7 to the battery pack 10 through the two-way communication control circuit 223 of the charger, and the two-way communication control circuit 223 receives the current temperature information of the battery pack and the voltage information of each cell fed back by the battery pack 10 .

The charger microprocessor 221 also collects voltage information and charging current information of the battery pack 10 through its voltage acquisition device 222 and current acquisition device 225 . The charger microprocessor 221 performs calculations according to the collected information, and then controls the charging control circuit 226 , the voltage control device 227 , the current control device 228 and the indicator 224 to perform corresponding operations. The charger microprocessor 221 continuously and repeatedly sends the application command and receives the real-time temperature information of the battery pack 10, the voltage information of each cell, and the voltage information and current information collected by the charger itself to intelligently control the charging control circuit 226, the voltage control device 227, the current Operation of control device 228 and indicator 224 .

The charger 20 sends various commands or information to the battery pack 10, and the battery pack 10 feeds back corresponding information to the charger 20 after receiving the command, and the charger 20 can control the charging current according to the characteristic information and application information of the battery pack 10, Charging voltage and indicator 224 . If the charger 20 does not get feedback or receives wrong data after the charger 20 sends the corresponding command to the battery pack 10, the charger will actively test whether the voltage of the battery pack 10 is within the normal operating range of the battery. Based on the normal working voltage set by the battery pack, the charger uses a specific charging current to force the battery pack to charge, and starts the recovery charging timer of the charger 20; when the battery pack voltage is higher than the battery pack communication set by the charger 20 When the voltage is restored and the recharging timer does not reach the set value, the charger will send one or more specific pulse signals to wake up the battery pack 10 again, and the charger 20 and the battery pack 10 will enter the communication and intelligent charging mode. On the contrary, the charger 20 cuts off the charging current and the charging voltage, and at the same time, the indicator on the charger 20 indicates the current working stop state.

As shown in Figure 6, the embodiment of the present invention also provides a discharge device 30, including a DC motor 34, a discharge device microprocessor 321, the DC motor 34 is connected to the positive and negative poles of the external battery pack through a reversing switch 33, The discharge device also includes a voltage detection device 326 for collecting the voltage of the battery pack 10 under the control of the discharge device microprocessor 321; a speed detection device 325 for collecting the voltage of the DC motor under the control of the discharge device microprocessor 321 The position information of the current speed sensor of 34; Current detection device 323, is used for collecting the current operating current of DC motor 34 under the control of discharge device microprocessor 321; Speed regulation control FET 31, is used for in discharge device microprocessor Control the working current of the DC motor 34 under control; the indicator 322 is used to display the working status of the discharge device 30 and the two-way communication control device 324 under the control of the microprocessor 321 of the discharge device.

The circuit formed by the DC motor 34 and the external battery pack is also connected in series with the source and the drain of the speed control FET 31, a current detection device 323 and a controllable switch, and one end of the microprocessor 321 of the discharge device is connected to the regulator. The gate of the speed control FET 31 is electrically connected, the other end is electrically connected to the positive terminal of the battery pack through a controllable switch, one end of the voltage detection device 326 is electrically connected to the discharge device microprocessor 321, and the other end is connected to the discharge device microprocessor 321 through the controllable switch. The positive terminal of the battery pack is electrically connected, and the speed detection device 325, the current detection device 323 and the indicator 322 are respectively electrically connected to the discharge device microprocessor 321, and the discharge device microprocessor 321 is also controlled by two-way communication. 324 communicates with the battery pack;

Among them, the discharge device microprocessor 321 controls the two-way communication control device 324 to exchange information with the battery pack, and controls the speed control FET according to the voltage of the battery pack, the temperature of the battery pack, the current speed of the DC motor, and the current operating current of the DC motor. 31 controls the working current of the DC motor 34 in real time.

As shown in FIG. 7 , an embodiment of the present invention also provides a discharge system, including a battery pack 10 and a discharge device 30 electrically connected to the battery pack 10. The battery pack 10 includes a battery pack with a positive terminal and a negative terminal of the battery. 11, the battery detection and control circuit 12 connected between the positive terminal and the negative terminal of the battery, the bidirectional communication interface 14 connected with the battery detection and control circuit 12, the discharge device 30 includes a DC motor 34, the discharge detection and Control circuit 32, speed control FET 31, DC motor 34 is electrically connected to the battery positive terminal and negative terminal of the battery pack 10 through a reversing switch 33, and the circuit formed by the DC motor 34 and the battery pack 10 is also The source and drain of the speed regulation control FET 31 are connected in series, the discharge detection and control circuit 32 is connected between the battery positive terminal and the battery negative terminal, and the discharge detection and control circuit 32 is also connected with the speed regulation control FET 31 The two-way communication interface 14 of grid, battery pack 10 is connected;

The battery detection and control circuit 12 performs information interaction with the discharge detection and control circuit 32, and controls the speed regulation according to the voltage of the battery pack 10, the temperature of the battery pack 10, the current speed of the DC motor 34, and the current operating current of the DC motor 34 The control FET 31 controls the working current size of the DC motor 34 in real time.

Further, the discharge detection and control circuit 32 includes a discharge device microprocessor 321, a controllable switch, a voltage detection device 326, a speed detection device 325, a two-way communication control device 324, a current detection device 323 and an indicator 322;

The DC motor 34 is electrically connected to the positive terminal 13 and the negative terminal 14 of the battery pack 10 through a reversing switch 33, and the circuit formed by the DC motor 34 and the battery pack 10 is also connected in series with a speed control FET 31. Source and drain, current detection device 323 and controllable switch, discharge device microprocessor 321 one end is connected with the gate of described speed regulation control FET 31, and the other end is connected with the positive terminal electrode of battery pack 10 through controllable switch. Connection, one end of the voltage detection device 326 is electrically connected to the microprocessor 321 of the discharge device, and the other end is electrically connected to the positive terminal 13 of the battery pack 10 through a controllable switch. The speed detection device 325, the current detection device 323 and the indicator 322 They are respectively electrically connected to the microprocessor 321 , and the microprocessor 321 is also electrically connected to the bidirectional communication interface 14 of the battery pack 10 through a bidirectional communication control device 324 .

The working principle of the above discharge system is as follows:

The discharge device 30 is powered on, the discharge device microprocessor 321, the voltage detection device 326, the speed detection device 325, the two-way communication control device 324, the current detection device 323 and the indicator 322 are initialized to a standby working state, and the speed control FET 31 is closed. DC motor 34 has no operating current. The discharge device microprocessor 321 sends one or more specific pulse signals to wake up the battery pack 10 through the two-way communication control device 324 , and the voltage detection device 326 collects the voltage of the battery pack at the same time. If the battery pack voltage is lower than the protection voltage set by the discharge device, the discharge device microprocessor 321, the voltage detection device 326, the speed detection device 325, the two-way communication control device 324, the current detection device 323 and the indicator 322 enter into low power consumption. state. On the contrary, the discharge device microprocessor 321 sends a discharge control command to the battery pack 10 through the two-way communication control device 324, and the battery pack 10 sends the battery pack temperature information and the voltage information of the battery cell to the discharge device 30 after receiving the discharge control command, and the discharge device 30 The two-way communication control device 324 of the battery pack 10 receives the battery pack temperature information and the battery cell voltage information (including each cell information, maximum cell voltage information, minimum cell voltage information, and discharge enable information) fed back by the battery pack 10 .

Then, the discharge device microprocessor 321 sends the battery authentication command and information to the battery pack 10 through the two-way communication control device 324, and the two-way communication control device 324 receives the battery pack encrypted authentication information fed back by the battery pack 10, and the discharge device microprocessor 321 Check whether the battery pack 10 is a legal battery pack by receiving and decrypting the encrypted authentication information of the battery pack 10, if the verification fails, the discharge device 30 stops working (the speed control FET 31 is closed, and all peripheral devices are in low power consumption state), otherwise the discharge device microprocessor 321 continuously collects the position information of the speed sensor through the speed detection device 325, collects the operating current information of the DC motor 34 through the current detection device 323, and collects the voltage information of the battery pack through the voltage detection device 326 And receive the real-time battery pack temperature information and cell voltage information fed back by the battery pack 10 through the two-way communication control device 324, and then generate a PWM (pulse width modulation) signal based on the above information and output it to the input terminal of the speed control FET 31, thereby controlling The current on the DC motor 34 also controls the speed of the DC motor 34 . If the operating current of the DC motor 34 exceeds the maximum operating current set by the microprocessor 321 of the discharge device or the voltage of the battery pack 10 is lower than the undervoltage protection point set by the microprocessor 321 of the discharge device or receives the stop signal sent by the battery pack 10 Discharge information, or do not receive feedback information, or receive error information, then the discharge device 30 stops working, the discharge device microprocessor 321 controls the speed regulation control FET 31 to close, and all peripheral devices are in a low power consumption state.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (10)

1. a power brick, comprises the battery core group with anode end and negative pole end, is connected to the power brick microprocessor between described anode end and negative pole end, characterized by further comprising:

Voltage detecting circuit, for gathering the voltage of the core that often economizes on electricity, and sends to power brick microprocessor by the battery core voltage of collection;

Temperature sensing circuit, for gathering the temperature of battery core group, and sends to power brick microprocessor by the battery core group temperature of collection;

Balancing circuitry, for balancing the pressure reduction between battery core under power brick microprocessor-based control;

Indicating device, for showing current capacities and/or the current operating state of power brick;

Two-way communication control circuit, has bi-directional communication interface, and described power brick Microprocessor S3C44B0X two-way communication control circuit carries out information interaction by described bi-directional communication interface and extraneous charger or electric discharge device;

Described voltage detecting circuit, balancing circuitry, temperature sensing circuit are electrically connected with described battery core group and power brick microprocessor respectively, and described two-way communication control circuit and indicating device are electrically connected with power brick microprocessor respectively.

2. power brick according to claim 1; it is characterized in that: described power brick microprocessor also stores the information of power brick, comprise battery core brand, battery core capacity, battery core connection in series-parallel quantity, maximum charge deboost, constant voltage charge electrical voltage point information, battery capacity indication lamp quantity, maximum charging current, maximum discharge current and time conditions, termination discharging current and voltage conditions, electricity voltage conditions, temperature limited condition, charging times information, production information, products application and protection information and software protocol.

3. a charger, comprises charger positive terminal, charger negative pole end and charger microprocessor, characterized by further comprising:

Switching Power Supply, has an alternating current input, for input AC electricity;

Charging control circuit, for controlling the charging work of charger under charger microprocessor-based control;

Voltage-operated device, for controlling the charging output voltage of charger under charger microprocessor-based control;

Current control device, for controlling the charging output current of charger under charger microprocessor-based control;

Voltage collecting device, for gathering the current output voltage of charger and sending to charger microprocessor;

Current collecting device, for gathering the current output current of charger and sending to charger microprocessor;

Indicating device, for showing the operating state of charger under charger microprocessor-based control;

Two-way communication control circuit, it is provided with communication interface;

Described Switching Power Supply, charging control circuit and current collecting device are serially connected between the positive terminal of charger and negative pole end, described charger microprocessor is connected between the positive terminal of charger and negative pole end, described voltage-operated device, current control device are electrically connected with Switching Power Supply and charger microprocessor respectively, charging control circuit, current collecting device, indicating device, two-way communication control circuit and Switching Power Supply are electrically connected with charger microprocessor respectively, and voltage collecting device is electrically connected with charger microprocessor and charger positive terminal respectively;

Wherein, charger Microprocessor S3C44B0X two-way communication control circuit carries out information interaction by communication interface and external connection battery bag, and controls according to the information of power brick, the current output voltage of charger, current output current the charging output voltage and the size of current that control charger in real time.

4. a charging system, the charger comprising power brick and be connected with power brick, it is characterized in that: described power brick comprises the battery core group with anode end and negative pole end, be connected to the battery detecting between described anode end and negative pole end and control circuit, the bi-directional communication interface be connected with control circuit with battery detecting, described charger comprises charger positive terminal, charger negative pole end and be connected between charger positive terminal and negative pole end can the charging Detection & Controling circuit of input AC electricity, the bi-directional communication interface be electrically connected with charging Detection & Controling circuit, the positive terminal of described charger is electrically connected with the positive terminal of power brick, the negative pole end of charger is electrically connected with the negative pole end of power brick, the bi-directional communication interface of charger is electrically connected with the bi-directional communication interface of power brick,

Described battery detecting and control circuit and charging Detection & Controling circuit carry out information interaction, and control charging output voltage and the size of current of charger in real time according to the battery core capacity of power brick, battery core connection in series-parallel quantity, maximum charge deboost, constant voltage charge electrical voltage point information, battery capacity indication lamp quantity, maximum charging current information, current battery temperature, current battery core charging voltage information, output current information, temperature limited condition and software protocol.

5. charging system according to claim 4, is characterized in that: described battery detecting and control circuit comprise voltage detecting circuit, temperature sensing circuit, balancing circuitry, power brick microprocessor, two-way communication control circuit and indicating device;

Described voltage detecting circuit, balancing circuitry, temperature sensing circuit are electrically connected with described battery core group and power brick microprocessor respectively, two-way communication control circuit, the indicating device of described battery detecting and control circuit are electrically connected with power brick microprocessor respectively, and described two-way communication control circuit is also connected with the bi-directional communication interface of power brick.

6. charging system according to claim 4, is characterized in that: described charging Detection & Controling circuit comprises Switching Power Supply, charger microprocessor, charging control circuit, voltage-operated device, current control device, voltage collecting device, current collecting device, indicating device, two-way communication control circuit for input AC electricity;

Described Switching Power Supply, charging control circuit and current collecting device are serially connected between the positive terminal of charger and negative pole end, described charger microprocessor is connected to positive terminal and the negative pole end of charger, described voltage-operated device, current control device is electrically connected with Switching Power Supply and charger microprocessor respectively, charging control circuit, current collecting device, indicating device, two-way communication control circuit and Switching Power Supply are electrically connected with charger microprocessor respectively, voltage collecting device is electrically connected with charger microprocessor and charger positive terminal respectively, the two-way communication control circuit of charging Detection & Controling circuit is also electrically connected with the communication interface of charger.

7. an electric discharge device, comprises direct current machine, electric discharge device microprocessor, and direct current machine is connected by the both positive and negative polarity of reversing switch with extraneous power brick, it is characterized in that described electric discharge device also comprises:

Voltage check device, for gathering the voltage of power brick under electric discharge device microprocessor-based control;

Speed detector, for gathering the positional information of the present speed transducer of direct current machine under electric discharge device microprocessor-based control;

Current sensing means, for gathering the current working current of direct current machine under electric discharge device microprocessor-based control;

Speed regulating control FET, for controlling operating current or the operating voltage of direct current machine under electric discharge device microprocessor-based control;

Indicating device, for showing the operating state of electric discharge device under electric discharge device microprocessor-based control;

Two-way communication control circuit, has the single terminal interface of two-way communication, and described electric discharge device Microprocessor S3C44B0X two-way communication control circuit carries out information interaction by described bi-directional communication interface and extraneous power brick;

Source electrode and the drain electrode of speed regulating control FET is also serially connected with in the loop that described direct current machine and extraneous power brick are formed, current sensing means and a gate-controlled switch, electric discharge device microprocessor one end is electrically connected with the grid of described speed regulating control FET, the other end is electrically connected with the positive terminal of power brick by gate-controlled switch, one end of voltage check device is electrically connected with electric discharge device microprocessor, the other end is electrically connected with the positive terminal of power brick by described gate-controlled switch, described speed detector, current sensing means and indicating device are electrically connected with described electric discharge device microprocessor respectively, described electric discharge device microprocessor is also communicated with power brick by bidirectional communication control device,

Wherein, electric discharge device Microprocessor S3C44B0X two-way communication control circuit and power brick carry out information interaction, and control the operating current size of direct current machine in real time according to the Position Control speed regulating control FET of the current working current of the present speed of the temperature of the voltage of power brick, power brick, direct current machine, direct current machine, maximum discharge current and time conditions, termination discharging current and voltage conditions, temperature limited condition and gate-controlled switch.

8. a discharge system, comprise power brick and be electrically connected electric discharge device with power brick, it is characterized in that: described power brick comprises the battery core group with anode end and negative pole end, be connected to the battery detecting between described anode end and negative pole end and control circuit, the bi-directional communication interface be connected with control circuit with battery detecting, described electric discharge device comprises direct current machine, discharge examination and control circuit, speed regulating control FET, direct current machine is electrically connected by the anode end of reversing switch and described power brick and negative pole end, source electrode and the drain electrode of speed regulating control FET is also serially connected with in the loop that described direct current machine and described power brick are formed, described discharge examination and control circuit are connected between anode end and battery cathode end, described discharge examination and control circuit also with the grid of speed regulating control FET, the bi-directional communication interface of power brick is connected,

Described battery detecting and control circuit and discharge examination and control circuit carry out information interaction, and control according to the voltage of power brick, the temperature of power brick, the present speed of direct current machine, the current working current of direct current machine the operating current size that speed governing, maximum discharge current and time conditions, termination discharging current and voltage conditions, temperature limited condition and gate-controlled switch Position Control FET control direct current machine in real time.

9. discharge system according to claim 8, is characterized in that: described battery detecting and control circuit comprise voltage detecting circuit, temperature sensing circuit, balancing circuitry, power brick microprocessor, two-way communication control circuit and indicating device;

Described voltage detecting circuit, balancing circuitry, temperature sensing circuit are electrically connected with described battery core group and power brick microprocessor respectively, two-way communication control circuit, the indicating device of described battery detecting and control circuit are electrically connected with power brick microprocessor respectively, and described two-way communication control circuit is also connected with the bi-directional communication interface of power brick.

10. discharge system according to claim 8, it is characterized in that: described discharge examination and control circuit comprise electric discharge device microprocessor, gate-controlled switch, voltage check device, speed detector, bidirectional communication control device, current sensing means and indicating device;

Direct current machine is electrically connected by the positive terminal of reversing switch and described power brick and negative pole end, source electrode and the drain electrode of speed regulating control FET is also serially connected with in the loop that described direct current machine and described power brick are formed, current sensing means and gate-controlled switch, electric discharge device microprocessor one end is connected with the grid of described speed regulating control FET, the other end is electrically connected with the positive terminal of power brick by gate-controlled switch, one end of voltage check device is electrically connected with electric discharge device microprocessor, the other end is electrically connected with the positive terminal of power brick by gate-controlled switch, described speed detector, current sensing means and indicating device are electrically connected with described microprocessor respectively, described microprocessor is also electrically connected with the bi-directional communication interface of power brick by bidirectional communication control device.