WO2018119798A1

WO2018119798A1 - Battery charging method, charging system and charger and battery

Info

Publication number: WO2018119798A1
Application number: PCT/CN2016/112773
Authority: WO
Inventors: 王文韬; 郑大阳; 田杰
Original assignee: 深圳市大疆创新科技有限公司
Priority date: 2016-12-28
Filing date: 2016-12-28
Publication date: 2018-07-05
Also published as: CN106797132B; CN106797132A

Abstract

A battery charging method, charging system (60) and charger (80), and a battery (90). Charging stages of the battery (90) comprise a first stage (31), a second stage (32), a third stage (33) and a fourth stage (34) that are sequentially performed. The method comprises: in the first stage (31), controlling a charging circuit (61) to charge the battery (90) by an output power greater than a rated power (S101); in the second stage (32), controlling the charging circuit (61) to charge the battery (90) by the rated power (S102); in the third stage (33), controlling the charging circuit (61) to charge the battery (90) by a pulse current (S103); and in the fourth stage (34), controlling the charging circuit (61) to charge the battery (90) by a constant voltage (S104). The method effectively shortens the charging time of the first stage (31) and the charging time of the fourth stage (34) for the battery (90), and does not require a charger of a larger output power for charging the battery (90), reducing costs of a charger as well as achieving fast charging of the battery (90).

Description

Battery charging method, charging system, charger and battery

Technical field

The embodiments of the present invention relate to the field of drones, and in particular, to a battery charging method, a charging system, a charger, and a battery.

Background technique

In the prior art, an unmanned aerial vehicle is usually equipped with a lithium battery as a power source. At present, the charging process of the lithium battery is divided into a constant current charging phase and a constant voltage charging phase. Specifically, after the lithium battery is connected to the charger, the lithium battery first enters a constant current charging phase, that is, the charger charges the lithium battery with a constant current until the lithium battery When the voltage of the battery rises to a voltage turning point between the constant current charging phase and the constant voltage charging phase, the lithium battery enters a constant voltage charging phase, that is, the charger charges the lithium battery at a constant voltage until the current of the lithium battery decreases to a threshold To complete the charge.

The charging time of the lithium battery in the constant current charging phase is related to the output power of the charger. If the output power of the charger is larger, the output current of the charger is larger, and the charging time of the lithium battery in the constant current charging phase is shorter; The charging time of the battery during the constant voltage charging phase is independent of the output power of the charger, but is related to the electrochemical behavior of the lithium battery.

In order to shorten the charging time of the lithium battery, the prior art generally uses a charger with a large output power to charge the lithium battery, but the charging time of the lithium battery in the constant voltage charging phase is not effectively shortened due to the large output power of the charger. At the same time, using a charger with a large output power will also increase the cost of the charger.

Summary of the invention

Embodiments of the present invention provide a battery charging method, a charging system, a charger, and a battery to improve a charging speed of the battery.

An aspect of an embodiment of the present invention provides a battery charging method, wherein a charging phase of the battery includes a first phase, a second phase, a third phase, and a fourth phase, which are sequentially performed, the method comprising:

In the first stage, the charging circuit is controlled to charge the battery with an output power greater than the rated power. Electricity;

In the second phase, controlling the charging circuit to charge the battery at the rated power;

In the third stage, controlling the charging circuit to charge the battery with a pulse current;

In the fourth phase, the charging circuit is controlled to charge the battery at a constant voltage.

Another aspect of the embodiments of the present invention provides a charging system for a battery, the charging system comprising:

a charging circuit for charging the battery;

One or more processors electrically coupled to the charging circuit for controlling the charging circuit to perform charging of the battery in a plurality of charging phases, the plurality of charging phases including a first phase and a second phase sequentially performed , the third phase and the fourth phase, the processor is used to:

In the first phase, controlling the charging circuit to charge the battery with an output power greater than the rated power;

Another aspect of an embodiment of the present invention is to provide a charger, including:

case;

And the charging system described is mounted within the housing.

Another aspect of the embodiments of the present invention provides a battery, including:

case;

The charging system is mounted within the housing;

A plurality of cells are electrically connected to the charging system.

The battery charging method, the charging system, the charger and the battery provided in this embodiment charge the battery in a plurality of charging phases by controlling the charging circuit, and the plurality of charging phases include the first phase, the second phase, and the third phase, which are sequentially performed. And the fourth stage, in the first stage, the charging circuit is controlled to charge the battery with an output power exceeding the rated power of the charger, which can effectively reduce the charging time of the battery in the first stage; in the second stage, the charging circuit is controlled to the rated power. The battery is charged to ensure the safety of the charging circuit; in the third stage, the charging circuit is controlled to charge the battery with a pulse current. The polarization effect of the lithium battery can be reduced; in the fourth stage, the charging circuit is controlled to charge the battery at a constant voltage. Since the charging time of the battery in the fourth stage is related to the polarization effect of the battery, the polarization effect of the battery is smaller, and the charging time of the battery in the fourth stage is shorter. Therefore, in the third stage, the charging circuit is controlled to pulse current. Charging the battery can effectively shorten the charging time of the battery in the fourth stage. Compared with the prior art, it is not necessary to use a charger with a large output power to charge the battery, thereby saving the cost of the charger and effectively shortening the battery. The charging time in the constant voltage charging phase achieves the effect of fast battery charging.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in view of the drawings.

1 is a schematic diagram of a charging phase of a battery in the prior art;

2 is a flowchart of a battery charging method according to an embodiment of the present invention;

3 is a schematic diagram of a battery charging phase according to an embodiment of the present invention;

4 is a flowchart of a battery charging method according to another embodiment of the present invention;

FIG. 5 is a flowchart of a battery charging method according to another embodiment of the present invention; FIG.

6 is a structural diagram of a charging system of a battery according to an embodiment of the present invention;

FIG. 7 is a structural diagram of a charging system of a battery according to another embodiment of the present invention; FIG.

FIG. 8 is a structural diagram of a charger according to an embodiment of the present invention; FIG.

FIG. 9 is a structural diagram of a battery according to an embodiment of the present invention.

Reference mark:

10-CC charging phase 11-CV charging phase 31-DP charging phase

32-CP charging phase 33-PC charging phase 34-CV charging phase

60-Charging System 61-Charging Circuit 62-Processor

63-electric parameter detection circuit 80-charger 81-shell

90-battery 91-housing 92-cell

detailed description

The technical solutions in the embodiments of the present invention will be clearly described with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or the component can be present. When a component is considered to "connect" another component, it can be directly connected to another component or possibly a central component.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. The terminology used in the description of the present invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and/or" used herein includes any and all combinations of one or more of the associated listed items.

Some embodiments of the present invention are described in detail below with reference to the accompanying drawings. The features of the embodiments and examples described below can be combined with each other without conflict.

At present, the charging process of a lithium battery is divided into a constant current (CC) charging phase and a constant voltage (CV) charging phase. As shown in FIG. 1, 10 indicates a CC charging phase, and 11 indicates a CV charging phase. Specifically, after the lithium battery is connected to the charger, the lithium battery first enters the CC charging phase 10, that is, the charger charges the lithium battery with a constant current I until the voltage of the lithium battery rises to between the CC charging phase 10 and the CV charging phase 11 At the voltage turning point O, the lithium battery enters the CV charging phase 11, that is, the charger charges the lithium battery at a constant voltage V until the current I of the lithium battery decreases to a threshold to complete charging.

The charging time of the lithium battery in the CC charging phase 10 is related to the output power P of the charger. If the output power P of the charger is larger, the output current I of the charger is larger, and the charging time of the lithium battery in the CC charging phase 10 is higher. Short; the charging time of the lithium battery in the CV charging phase 11 is independent of the charger's output power P, but is related to the electrochemical behavior of the lithium battery.

In order to shorten the charging time of the lithium battery, the prior art generally uses a charger with a large output power P to charge the lithium battery, but the charging time of the lithium battery in the CV charging phase 11 is not effective due to the large output power P of the charger. Shortened, while using a charger with a large output power P It will also increase the cost of the charger. In order to solve this problem, the present disclosure provides a battery charging method, and a battery charging system, which will be described in detail below.

Embodiments of the present invention provide a battery charging method. FIG. 2 is a flowchart of a battery charging method according to an embodiment of the present invention. As shown in FIG. 3, the charging phase of the battery includes a first phase 31, a second phase 32, a third phase 33, and a fourth phase 34, which are sequentially performed. Specifically, the first phase 31 is dynamic power (Dynamic Power, Referring to the DP) charging phase, the second phase 32 is a constant power (CP) charging phase, the third phase 33 is a pulse current (PC) charging phase, and the fourth phase 34 is a constant voltage (Constant Voltage). , referred to as CV) charging phase. In the first phase 31, the output power P of the charger is greater than the rated power of the charger; in the second phase 32, the output power P of the charger is the rated power of the charger; in the third phase 33, the charger outputs the pulse current I In the fourth stage 34, the output voltage V of the charger is constant.

In this embodiment, the performance of the charger in the above four charging stages is different, so as to achieve the purpose of quickly charging the battery by the charger, which will be described below with reference to FIG. 2, as shown in FIG. 2, the method in this embodiment may include :

Step S101: In the first stage, the charging circuit is controlled to charge the battery with an output power greater than the rated power.

In this embodiment, the core component for charging the battery in the charger may be a charging circuit, and the execution body of the embodiment may be a control circuit, a control chip, a processor or a control component, etc. in the charger capable of controlling the charging circuit. Optionally, in this embodiment, the processor is used as the execution subject.

In addition, the battery may specifically be a lithium battery, and the lithium battery includes a plurality of cells connected in series or/and in parallel. After the charger is electrically connected to the battery, the charging circuit charges the battery cells.

In addition, in other embodiments, the lithium battery may specifically be a battery on an unmanned aerial vehicle or a movable robot for providing power to the unmanned aerial vehicle or the movable robot.

As shown in FIG. 3, the first stage 31 is the initial stage of charging the battery by the charging circuit of the charger. In the initial stage of charging, the starting temperature of the charger is low. In a short time, the charger outputs power exceeding the rated power. The heat generated by charging the battery is not much, the temperature of charging accumulation is not high, and there is no safety and reliability effect on the power components in the charger. Therefore, in the first stage of charging, the processor can control the charging circuit. Output power P exceeding the rated power of the charger Charge the lithium battery. Since the charging time of the lithium battery in the DP charging phase, that is, the first phase 31 is related to the output power P of the charger, that is, the larger the output power P of the charger, the shorter the charging time of the lithium battery in the DP charging phase, therefore, In a stage 31, when the charging circuit charges the lithium battery with the output power P exceeding the rated power, the charging time of the lithium battery in the DP charging phase can be effectively reduced.

In the first stage 31, as the charging time continues, the heat generated by the charger gradually increases and the temperature gradually rises. If the charger exceeds the tolerance range, the charger will be damaged. Therefore, when the heat generated by the charger reaches When the heat threshold or the temperature of the charger reaches the temperature threshold, the charging phase of the lithium battery enters the second phase 32, the CP charging phase 32, from the first phase 31, the DP charging phase 31.

Step S102: In the second phase, controlling the charging circuit to charge the battery at the rated power.

As shown in FIG. 3, in the second stage 32, the processor controls the charging circuit to charge the lithium battery with the rated power, that is, the output power P of the charger is maintained at the rated power of the charger. At this time, the voltage across the lithium battery is less than The rated output voltage of the charger, the processor can also control the charging circuit to increase the charging current, which can be higher than the rated output current of the charger to increase the voltage across the lithium battery.

In the second stage 32, when the charging circuit charges the lithium battery at the rated power, the processor increases the charging current by controlling the charging circuit, thereby improving the output efficiency of the charger.

As shown in FIG. 3, in the second stage 32, as the charging time continues, the voltage V across the lithium battery or the output voltage V of the charger gradually rises, when the voltage V across the lithium battery or the output voltage of the charger V Upon reaching the voltage turning point a between the CP charging phase 32 and the PC charging phase 33, the lithium battery enters the PC charging phase 33, the third phase 33.

Step S103, in the third stage, controlling the charging circuit to charge the battery with a pulse current.

In the third stage 33, the processor controls the charging circuit to charge the lithium battery with the pulse current I, and the voltage V across the lithium battery or the output voltage V of the charger slowly rises, and the pulse current I can reduce the polarization effect of the lithium battery. Alternatively, in the third phase 33, the high level duration of the pulse current I is on the order of milliseconds.

As shown in FIG. 3, in the third stage 33, as the charging time continues, the power at both ends of the lithium battery The output voltage V of the voltage V or the charger rises slowly. When the voltage V across the lithium battery or the output voltage V of the charger reaches the voltage turning point b between the PC charging phase 33 and the CV charging phase 34, the lithium battery enters the CV charging phase. 34 is the fourth stage 34.

Step S104, in the fourth stage, controlling the charging circuit to charge the battery at a constant voltage.

In the fourth stage 34, the processor controls the charging circuit to charge the lithium battery with a voltage corresponding to the constant voltage V, that is, the voltage turning point b, while controlling the output current of the charging circuit to gradually decrease until the current I of the lithium battery decreases to a threshold to complete the charging. .

Since the charging time of the lithium battery in the CV charging phase 34 is independent of the output power P of the charger, it is related to the polarization effect of the lithium battery, that is, the smaller the polarization effect of the lithium battery, and the charging time of the lithium battery in the CV charging phase 34. The shorter, therefore, in the third stage 33, the processor controls the charging circuit to charge the lithium battery with the pulse current I, reducing the polarization effect of the lithium battery, and effectively shortening the charging time of the lithium battery in the CV charging phase 34.

In this embodiment, the battery is charged in a plurality of charging phases by controlling the charging circuit, and the plurality of charging phases include a first phase, a second phase, a third phase, and a fourth phase, which are sequentially performed, and the charging circuit is controlled to exceed in the first phase. The rated power output of the charger charges the battery, which can effectively reduce the charging time of the battery in the first stage; in the second stage, the charging circuit is controlled to charge the battery with the rated power to ensure the safety of the charging circuit; In the stage, the charging circuit is controlled to charge the battery with a pulse current, which can reduce the polarization effect of the lithium battery; in the fourth stage, the charging circuit is controlled to charge the battery with a constant voltage. Since the charging time of the battery in the fourth stage is related to the polarization effect of the battery, the polarization effect of the battery is smaller, and the charging time of the battery in the fourth stage is shorter. Therefore, in the third stage, the charging circuit is controlled to pulse current. Charging the battery can effectively shorten the charging time of the battery in the fourth stage. Compared with the prior art, it is not necessary to use a charger with a large output power to charge the battery, thereby saving the cost of the charger and effectively shortening the battery. The charging time in the constant voltage charging phase achieves the effect of fast battery charging.

Embodiments of the present invention provide a battery charging method. FIG. 4 is a flowchart of a battery charging method according to another embodiment of the present invention. As shown in FIG. 4, on the basis of the embodiment shown in FIG. 1, the method in this embodiment may include:

Step S201, in the first stage, controlling the charging circuit to output work with a power greater than the rated power. Rate the battery.

In this embodiment, the battery may be a lithium battery, and the lithium battery includes a plurality of cells connected in series or/and in parallel. After the charger is electrically connected to the battery, the charging circuit charges the battery cells.

Step S202: In the first stage, detecting heat generated by the charging circuit.

Based on the above embodiment, the charger further includes an electrical parameter detecting circuit capable of detecting an electrical parameter of the charging circuit. Specifically, the electrical parameter detecting circuit detects the electrical parameter of the charging circuit in the first phase 31, and the electrical parameter detecting circuit Specifically, the electrical parameter detecting circuit includes at least one of the following: a voltage detecting circuit, a current detecting circuit, and a resistance detecting circuit, wherein the voltage detecting circuit is configured to detect an output voltage V of the charging circuit, and the current detecting circuit is configured to: The output current I of the charging circuit is detected, and the resistance detecting circuit is used to detect the resistance R of the charging circuit.

In the first stage 31, the processor may determine the heat generated by the charging circuit according to the electrical parameter of the charging circuit detected by the electrical parameter detecting circuit, for example, calculate the charging circuit according to the output voltage V and the output current I of the charging circuit. The relationship between the output power P, the output power P, the output voltage V, and the output current I can be determined according to formula (1):

P=V*I (1)

Then, according to the output power P of the charging circuit and the charging time t of the charging circuit to the lithium battery, the heat quantity Q generated by the charging circuit is calculated, and the relationship between the heat quantity Q, the output power P and the charging time t can be determined according to the formula (2):

Q=P*t (2)

In the first phase 31, when the heat generated by the charging circuit reaches the thermal threshold, the charging phase of the lithium battery enters the second phase 32, the CP charging phase 32, from the first phase 31, the DP charging phase 31.

In addition, the electrical parameter detecting circuit may further include a temperature sensor, and the temperature sensor may be used to detect the temperature of the charging circuit in real time. Specifically, the temperature sensor may be used to monitor the temperature of the power component in the charging circuit, and the charging may be adopted in this embodiment. The current temperature of the power component in the circuit indicates the current temperature of the charging circuit. Since the heat generated by the charging circuit is proportional to the temperature of the charging circuit, if the current temperature of the charging circuit is higher, the heat generated by the charging circuit is increased. Therefore, in this embodiment, the current temperature of the power component in the charging circuit can also be monitored by a temperature sensor. In the first phase 31, when the temperature of the power component in the charging circuit reaches a temperature threshold, the charging phase of the lithium battery enters from the first phase 31, ie, the DP charging phase 31. The second phase 32 is the CP charging phase 32.

Step S203, in the second phase, controlling the charging circuit to charge the battery at the rated power.

Step S203 is the same as step S102. The specific method is not described here.

Step S204, in the third stage, controlling the charging circuit to charge the battery with a pulse current.

Step S204 is consistent with step S103, and the specific method is not described herein again.

Step S205, in the fourth stage, controlling the charging circuit to charge the battery at a constant voltage.

Step S205 is the same as step S104, and the specific method is not described herein again.

In this embodiment, when the heat generated by the charging circuit is detected in the first stage, and the charging circuit is prevented from charging the battery with the output power exceeding the rated power in the first stage, the generated heat exceeds the receiving range of the charging circuit, and the charging circuit is burned. Bad, specifically, the temperature of the power component in the charging circuit is monitored by a temperature sensor. When the temperature of the power component in the charging circuit reaches a temperature threshold, the output power of the charging circuit is immediately restored to the rated power, which improves the The control of the charging circuit is accurate, and the battery is shortened based on the charging time of the first stage, thereby ensuring the safety of the charging circuit.

Embodiments of the present invention provide a battery charging method. FIG. 5 is a flowchart of a battery charging method according to another embodiment of the present invention. As shown in FIG. 5, on the basis of the embodiment shown in FIG. 1, the method in this embodiment may include:

Step S301, in the first stage, controlling the charging circuit to charge the battery with an output power greater than the rated power.

Step S302: In the first stage, detecting heat generated by the charging circuit.

Step S302 is consistent with step S202, and the specific method is not described herein again.

Step S303, in the second phase, controlling the output current of the charging circuit to gradually decrease, and gradually increasing the output voltage, so that the output power of the charging circuit is the rated power of the charging circuit.

In the second stage 32, the processor controls the charging circuit to charge the lithium battery at the rated power. The relationship between the output current I of the charging circuit, the output voltage V of the charging circuit, and the output power P of the charging circuit can be according to the above embodiment. The formula (1) determines, therefore, an implementation manner in which the processor controls the output power of the charging circuit to be maintained at the rated power is: controlling the output current I of the charging circuit to gradually decrease, and controlling the output voltage V of the charging circuit to gradually increase, such as In the second phase 32 shown in FIG. 3, the output current I of the charging circuit gradually decreases, and the output voltage V of the charging circuit gradually rises.

As shown in FIG. 3, in the second stage 32, as the charging time continues, the voltage V across the lithium battery or the output voltage V of the charger gradually rises, when the voltage V across the lithium battery or the output voltage of the charger V When the first voltage threshold is reached, the lithium battery enters the PC charging phase 33, that is, the third phase 33, which is specifically the voltage corresponding to the voltage turning point a between the CP charging phase 32 and the PC charging phase 33.

Step S304, in the third stage, controlling the charging circuit to charge the battery with a pulse current.

In the third stage 33, the processor controls the charging circuit to charge the lithium battery with the pulse current I, while in the third stage 33, the output power P of the charging circuit is the pulse power.

As shown in FIG. 3, in the third stage 33, the output voltage V of the charger is greater than the first voltage threshold, and the output voltage V of the charger rises slowly, but the rate of rise of the output voltage of the charging circuit in the second stage 32 is Greater than the rate of rise of the output voltage of the charging circuit in the third phase 33, i.e., the rate of increase of the output voltage of the charging circuit in the second phase 32, the output voltage of the charging circuit is slower in the third phase 33.

Step S305, in the third stage, adjusting the duty ratio of the pulse current to adjust the average charging current.

In this embodiment, in the third stage 33, the processor can also be used to adjust the duty cycle of the pulse current I to adjust the average charging current of the charging circuit in the third stage 33, specifically, the duty ratio of the pulse current I. The larger the charging circuit, the larger the average charging current in the third phase 33.

As shown in FIG. 3, in the third stage 33, as the charging time continues, the voltage V across the lithium battery or the output voltage V of the charger slowly rises, when the voltage V across the lithium battery or the output voltage V of the charger reaches At the second voltage threshold, the lithium battery enters the CV charging phase 34, which is the fourth phase 34, which is specifically between the PC charging phase 33 and the CV charging phase 34. The voltage turns to a voltage corresponding to point b, and the second voltage threshold is greater than the first voltage threshold.

Step S306, in the fourth stage, controlling the charging circuit to charge the battery at a constant voltage.

Step S306 is the same as step S205. The specific method is not described here.

In the second embodiment, by controlling the output current of the charging circuit to gradually decrease and controlling the output voltage of the charging circuit to gradually increase, the charging circuit ensures that the charging circuit charges the lithium battery at the rated power in the second stage.

Embodiments of the present invention provide a charging system for a battery. 6 is a structural diagram of a charging system for a battery according to an embodiment of the present invention. As shown in FIG. 6, the charging system 60 includes a charging circuit 61 and one or more processors 62 for charging the battery 90. The processor 62 is electrically connected to the charging circuit 61 for controlling the charging circuit 61 to perform charging of the battery in a plurality of charging phases, where the plurality of charging phases include the first phase, the second phase, the third phase, and the In four stages, the processor 62 is configured to: in the first phase, control the charging circuit 61 to charge the battery 90 with an output power greater than the rated power; in the second phase, control the charging circuit 61 to supply the battery with the rated power At the third stage, the charging circuit 61 is controlled to charge the battery 90 with a pulse current; in the fourth stage, the charging circuit 61 is controlled to charge the battery 90 at a constant voltage.

The specific principles and implementations of the charging system provided by the embodiments of the present invention are similar to the embodiment shown in FIG. 2, and details are not described herein again.

In this embodiment, the battery is charged in a plurality of charging phases by controlling the charging circuit, and the plurality of charging phases include a first phase, a second phase, a third phase, and a fourth phase, which are sequentially performed, and the charging circuit is controlled to exceed in the first phase. The rated power output of the charger charges the battery, which can effectively reduce the charging time of the battery in the first stage; in the second stage, the charging circuit is controlled to charge the battery with the rated power to ensure the safety of the charging circuit; In the stage, the charging circuit is controlled to charge the battery with a pulse current, which can reduce the polarization effect of the lithium battery; in the fourth stage, the charging circuit is controlled to charge the battery with a constant voltage. Since the charging time of the battery in the fourth stage is related to the polarization effect of the battery, the polarization effect of the battery is smaller, and the charging time of the battery in the fourth stage is shorter. Therefore, in the third stage, the charging circuit is controlled to pulse current. Charging the battery can effectively shorten the charging time of the battery in the fourth stage. Compared with the prior art, it does not need to adopt a large output power. The charger charges the battery, which saves the cost of the charger. At the same time, it also effectively shortens the charging time of the battery during the constant voltage charging phase, thereby achieving the effect of fast charging of the battery.

Embodiments of the present invention provide a charging system for a battery. FIG. 7 is a structural diagram of a charging system for a battery according to another embodiment of the present invention; on the basis of the technical solution provided by the embodiment shown in FIG. 6, the charging system 60 further includes: electrical parameter detection electrically connected to the processor 62. The circuit 63, the electrical parameter detecting circuit 63 is for detecting the electrical parameter of the charging circuit 61 in the first stage; the processor 62 determines the heat generated by the charging circuit 61 based on the electrical parameter of the charging circuit 61 in the first stage. In the first phase, when the heat generated by the charging circuit reaches a thermal threshold, the charging phase of the battery enters the second phase from the first phase.

Optionally, the electrical parameter detecting circuit 63 includes at least one of a temperature sensor, a voltage detecting circuit, a current detecting circuit, and a resistance detecting circuit. The temperature sensor is used to detect the current temperature of the charging circuit 61. Specifically, the temperature sensor is used to monitor the current temperature of the power component in the charging circuit 61. In the first phase, when the temperature of the power component in the charging circuit reaches a temperature threshold, the charging phase of the battery enters the second phase from the first phase.

The specific principles and implementations of the charging system provided by the embodiments of the present invention are similar to the embodiment shown in FIG. 4, and details are not described herein again.

Embodiments of the present invention provide a charging system for a battery. On the basis of the technical solution provided by the embodiment shown in FIG. 5, in the second stage, the processor 62 controls the charging circuit 61 to charge the battery at the rated power, specifically for controlling the output current of the charging circuit 61. Falling, the output voltage is gradually increased, so that the output power of the charging circuit 61 is the rated power of the charging circuit 61 rate.

In the second phase, when the output voltage of the charging circuit reaches a first voltage threshold, the charging phase of the battery enters the third phase from the second phase. In the third stage, the charging circuit 61 charges the battery with a pulse current, and at the same time, the output power of the charging circuit is pulse power.

In the third stage, the output voltage of the charging circuit is greater than the first voltage threshold, and continues to rise, and the rising rate of the output voltage of the charging circuit in the second phase is greater than the charging circuit in the The rate of rise of the three-stage output voltage. In the third phase, when the output voltage of the charging circuit reaches a second voltage threshold, the charging phase of the battery enters the fourth phase from the third phase. The second voltage threshold is greater than the first voltage threshold.

Additionally, in the third phase, the processor 62 is further configured to: adjust a duty cycle of the pulse current to adjust an average charging current.

Further, in this or other embodiments, the battery is a lithium battery. The battery includes a plurality of cells in series or/and in parallel.

The specific principles and implementations of the charging system provided by the embodiments of the present invention are similar to the embodiment shown in FIG. 5, and details are not described herein again.

Embodiments of the present invention provide a charger. FIG. 8 is a structural diagram of a charger according to an embodiment of the present invention. As shown in FIG. 8, the charger 80 includes a housing 81, and the charging system 60 described in the above embodiment. The charging system 60 is mounted on the housing 81. Inside.

The specific principles and implementations of the charging system provided by the embodiments of the present invention are similar to the foregoing embodiments, and are not described herein again.

In this embodiment, the battery is charged in a plurality of charging phases by controlling the charging circuit, and the plurality of charging phases include a first phase, a second phase, a third phase, and a fourth phase, which are sequentially performed, and the charging circuit is controlled to exceed in the first phase. The rated power output of the charger charges the battery, which can effectively reduce the charging time of the battery in the first stage; in the second stage, the charging circuit is controlled to charge the battery with the rated power to ensure the safety of the charging circuit; Stage, control charging circuit Charging the battery with a pulse current reduces the polarization effect of the lithium battery; in the fourth stage, the charging circuit is controlled to charge the battery at a constant voltage. Since the charging time of the battery in the fourth stage is related to the polarization effect of the battery, the polarization effect of the battery is smaller, and the charging time of the battery in the fourth stage is shorter. Therefore, in the third stage, the charging circuit is controlled to pulse current. Charging the battery can effectively shorten the charging time of the battery in the fourth stage. Compared with the prior art, it is not necessary to use a charger with a large output power to charge the battery, thereby saving the cost of the charger and effectively shortening the battery. The charging time in the constant voltage charging phase achieves the effect of fast battery charging.

Embodiments of the present invention provide a battery. FIG. 9 is a structural diagram of a battery according to an embodiment of the present invention. As shown in FIG. 9, the battery 90 includes a housing 91, a charging system 60 according to the above embodiment, and a plurality of batteries 92. The charging system 60 is mounted on the housing. Within the body 91, a plurality of cells 92 are electrically coupled to the charging system 60.

In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, actual There may be additional divisions at present, for example multiple units or components may be combined or integrated into another system, or some features may be omitted or not implemented. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

The above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium. The above software functional unit is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform the methods of the various embodiments of the present invention. Part of the steps. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

A person skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of each functional module described above is exemplified. In practical applications, the above function assignment can be completed by different functional modules as needed, that is, the device is installed. The internal structure is divided into different functional modules to perform all or part of the functions described above. For the specific working process of the device described above, refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

A battery charging method, characterized in that the charging phase of the battery comprises a first phase, a second phase, a third phase and a fourth phase, which are sequentially performed, the method comprising:

In the first phase, controlling the charging circuit to charge the battery with an output power greater than the rated power;

In the second phase, controlling the charging circuit to charge the battery at the rated power;

In the third stage, controlling the charging circuit to charge the battery with a pulse current;

In the fourth phase, the charging circuit is controlled to charge the battery at a constant voltage.
The method of claim 1 further comprising:

In the first phase, the heat generated by the charging circuit is detected.
The method according to claim 2, wherein in said first stage, when said heat generated by said charging circuit reaches a heat threshold, said charging phase of said battery enters said second from said first phase stage.
The method according to claim 2, wherein said detecting the heat generated by said charging circuit comprises:

The current temperature of the charging circuit is detected.
The method according to claim 4, wherein said detecting a current temperature of said charging circuit comprises:

The current temperature of the power components in the charging circuit is monitored by a temperature sensor.
The method of claim 5 wherein in said first phase, when the temperature of the power component in said charging circuit reaches a temperature threshold, said charging phase of said battery enters from said first phase The second stage.
The method of claim 1 wherein said controlling said charging circuit to charge said battery at said rated power comprises:

The output current of the charging circuit is controlled to gradually decrease, and the output voltage is gradually increased, so that the output power of the charging circuit is the rated power of the charging circuit.
The method according to claim 7, wherein in said second phase, when an output voltage of said charging circuit reaches a first voltage threshold, said charging phase of said battery enters said said second phase The third stage.
The method according to claim 8, wherein in the third stage, an output voltage of the charging circuit is greater than the first voltage threshold and continues to rise, and the charging circuit outputs in the second stage The rate of rise of the voltage is greater than the rate of rise of the output voltage of the charging circuit during the third phase.
The method according to claim 9, wherein in said third stage, when an output voltage of said charging circuit reaches a second voltage threshold, said charging phase of said battery enters said said third phase The fourth stage.
The method of claim 10 wherein said second voltage threshold is greater than said first voltage threshold.
The method of claim 1 wherein in said third phase, said output power of said charging circuit is pulsed power.
The method of claim 1 further comprising:

In the third phase, the duty cycle of the pulse current is adjusted to adjust the average charging current.
A method according to any one of claims 1 to 13, wherein the battery is a lithium battery.
A method according to any one of claims 1 to 13, wherein the battery comprises a plurality of cells connected in series or/and in parallel.
A charging system for a battery, characterized in that the charging system comprises:

a charging circuit for charging the battery;

One or more processors electrically coupled to the charging circuit for controlling the charging circuit to perform charging of the battery in a plurality of charging phases, the plurality of charging phases including a first phase and a second phase sequentially performed , the third phase and the fourth phase, the processor is used to:

In the first phase, controlling the charging circuit to charge the battery with an output power greater than the rated power;

In the second phase, controlling the charging circuit to charge the battery at the rated power;

In the third stage, controlling the charging circuit to charge the battery with a pulse current;

In the fourth phase, the charging circuit is controlled to charge the battery at a constant voltage.
The charging system of claim 16 further comprising:

An electrical parameter detecting circuit electrically connected to the processor, wherein the electrical parameter detecting circuit is used for detecting Measuring electrical parameters of the charging circuit in the first phase;

The processor determines heat generated by the charging circuit according to an electrical parameter of the charging circuit in the first stage.
The charging system according to claim 17, wherein said electrical parameter detecting circuit comprises at least one of the following:

Temperature sensor, voltage detection circuit, current detection circuit and resistance detection circuit.
The charging system according to claim 17, wherein in said first stage, when said heat generated by said charging circuit reaches a heat threshold, said charging phase of said battery enters said said first stage Two stages.
The charging system of claim 18 wherein said temperature sensor is operative to detect a current temperature of said charging circuit.
The charging system of claim 18 wherein said temperature sensor is operative to monitor a current temperature of a power component in said charging circuit.
The charging system according to claim 21, wherein in said first stage, when the temperature of the power component in said charging circuit reaches a temperature threshold, said charging phase of said battery is from said first stage Enter the second phase.
The charging system according to claim 16, wherein said processor controls said charging circuit to specifically charge said battery at said rated power:

The output current of the charging circuit is controlled to gradually decrease, and the output voltage is gradually increased, so that the output power of the charging circuit is the rated power of the charging circuit.
The charging system according to claim 23, wherein in said second phase, when an output voltage of said charging circuit reaches a first voltage threshold, said charging phase of said battery enters from said second phase The third stage.
The charging system according to claim 24, wherein in said third stage, said output voltage of said charging circuit is greater than said first voltage threshold and continues to rise, said charging circuit being in said second stage The rate of rise of the output voltage is greater than the rate of rise of the output voltage of the charging circuit during the third phase.
The charging system according to claim 25, wherein in said third stage, when an output voltage of said charging circuit reaches a second voltage threshold, said charging phase of said battery enters from said third phase The fourth stage.
The charging system of claim 26 wherein said second voltage threshold is greater than said first voltage threshold.
The charging system according to claim 16, wherein in said third stage, said output power of said charging circuit is pulse power.
The charging system of claim 16 wherein said processor is further configured to:

In the third phase, the duty cycle of the pulse current is adjusted to adjust the average charging current.
A charging system according to any one of claims 16 to 29, wherein the battery is a lithium battery.
A charging system according to any of claims 16-29, wherein the battery comprises a plurality of cells connected in series or/and in parallel.
A charger, comprising:

case;

A charging system according to any of claims 16-31 mounted in the housing.
A battery, comprising:

case;

A charging system according to any of claims 16-31, mounted within said housing;

A plurality of cells are electrically connected to the charging system.