JP3210159U - Charger - Google Patents

Abstract

A charging device is provided. A charging device is electrically connected to an input winding W1 for receiving an input voltage Vin and a first energy storage element BAT1, and receives an input voltage to provide a first output voltage V1. A first output winding W2-1 that transforms and a second output winding W2 that is electrically connected to the second energy storage element BAT2 and transforms the input voltage to provide a second output voltage V2. −2 and a third output voltage V3 for charging the first energy storage element after being superimposed on the first output voltage and charging the second energy storage element after being superimposed on the second output voltage. And a step-up circuit B1 electrically connected to the first output winding and the second output winding. [Selection] Figure 1

Description

  The present invention relates to a charging device, and more particularly to a multi-output charging device.

  In general, in a charging device or adapter technology for charging a plurality of batteries at the same time, the secondary voltage of the transformer circuit of the charging device or adapter is always controlled so as to control and adjust the charging voltage for the battery of each output winding, respectively. On the side, a corresponding quantity of output windings and control chips must be provided. As an example, in a charging device having N battery charging ports, since it is necessary to provide N output windings and N control chips on the secondary side of the transformer circuit, the charging device has a large volume and costs. Is expensive.

  In one technical aspect of the present invention, a first winding that is electrically connected to an input winding for receiving an input voltage and a first energy storage element to transform the input voltage to provide a first output voltage. A second output winding electrically connected to the second energy storage element and transforming the input voltage to provide a second output voltage, superimposed on the first output voltage Providing a third output voltage to charge the second energy storage element after charging the first energy storage element and superimposing it with the second output voltage; And a booster circuit electrically connected to the output winding.

  According to the description of the present invention, a novel charging configuration for controlling charging voltages of a plurality of output ports by a single chip is realized. In addition, the charging configuration provided in the present invention may have a wide voltage output range feature.

It is a charging device block diagram of one Example concerning this invention. It is an energy storage element block diagram of one Example which concerns on this invention. 1 is a circuit diagram of a charging device according to an embodiment of the present invention. It is a processing unit circuit diagram of one example concerning the present invention. 1 is a circuit diagram of a charging device according to an embodiment of the present invention.

  Although the following has been described in detail with reference to the drawings with reference to the drawings, the specific embodiments described are only for interpreting the present invention, but are not intended to limit the present invention. In addition, the description of the structure and operation is not intended to limit the execution procedure, and any structure having a new combination of elements or an apparatus having the equivalent effect is within the scope of the present invention. included. It should be noted that the drawings are for schematic description only, and are not drawn to scale.

  The terms used in the entire specification and utility model registration request (terms), unless otherwise specified, usually have the general meaning used in this field, the content of the invention and the special content, for each term. Certain terms for describing the present invention are discussed below or elsewhere in this specification so as to provide those skilled in the art with guidance outside the specification in the description of the present invention.

  FIG. 1 is a configuration diagram illustrating a charging device 100 according to an embodiment of the present invention. The charging apparatus 100 includes an input winding W1, a first output winding W2-1, a second output winding W2-2, a booster circuit B1, and a processing unit P1. The input winding W1 is a primary winding of the transformer unit of the charging apparatus 100, and both the first output winding W2-1 and the second output winding W2-2 are two of the transformer unit. It is a secondary winding. It should be noted that in this embodiment, only two output windings such as the first output winding W2-1 and the second output winding W2-2 have been described as examples. However, the present invention is not limited to this. In actual applications, the charging device 100 may be provided with only a single output winding, a third output winding or more output windings as required. Good.

Input winding W1 is for receiving an input voltage V _in. In one embodiment, the input voltages V _in is the power provided from commercial power supply or other power generating devices. When providing an input voltage _{V in} the input winding W1 of the charging device 100, the input voltage _{V in} is the first output voltages _{V 1} is a transformer with input winding W1 by the first output winding W2-1 And is transformed by the input winding W1 and the second output winding W2-2 to generate the _second output voltage V2. The first output voltage V ₁ and the second output voltage V ₂ is a constant voltage, the magnitude of the first output voltages V ₁ is the number of turns of the input winding W1 and the first output winding W2-1 It related to the ratio of the number of turns of the magnitude of the second output voltage V ₂ is related to the ratio of the number of turns of the windings and the second output winding W2-2 of input winding W1. This is normal knowledge in this technical field, and will not be repeated separately.

  The first output winding W2-1 is for being electrically connected to the first energy storage element BAT1 so as to charge the first energy storage element BAT1, and the second output winding W2-2 is for being electrically connected to the second energy storage element BAT2 so as to charge the second energy storage element BAT2. The first energy storage element BAT1 and the second energy storage element BAT2 may be a commonly found rechargeable battery or a 24 volt battery or a 48 volt battery dedicated to an electric vehicle. It should be noted that in this embodiment, only two energy storage elements are described as an example, but in actual application, a single or more energy storage elements may be installed / connected as necessary, The present invention is not limited to this. As an example, when the power of the input power is insufficient, the first output winding W2-1 may charge two or more first energy storage elements BAT1 connected in parallel.

The processing unit P1 is electrically connected to the booster circuit B1 and controls the booster circuit B1 so as to provide the _third output voltage V3. The detailed configuration of the processing unit P1 and the operation mechanism of the booster circuit B1 Will be further described below. Since the step-up circuit B1 is electrically connected to the power output terminal of the first output winding W2-1 and second output windings W2-2, third output voltage V ₃ is a respective one superimposed in the output voltage _{V 1} and the second output voltage _{V 2.} Therefore, the charging device 100 charges the first energy storage element BAT1 with the superimposed voltage V ₁ + V ₃ and charges the second energy storage element BAT2 with the superimposed voltage V ₂ + V ₃ .

  Among these, when there is no abnormality (failure) in the first energy storage element BAT1 and / or the second energy storage element BAT2, the first energy storage element BAT1 and / or the second energy storage element BAT2 is added to the charging device 100. When connected, the first energy storage element BAT1 and / or the second energy storage element BAT2 provides a voltage signal to the processing unit P1. The reception of this voltage signal by the processing unit P1 indicates that it is detected that the first energy storage element BAT1 and / or the second energy storage element BAT2 is already connected to the charging device 100.

The processing unit P1 first detects the first voltage specification of the first energy storage element BAT1 and / or the second voltage specification of the second energy storage element BAT2. Next, the processing unit P1 controls the booster circuit B1 to adjust the _third output voltage V3 based on the detected first voltage specification and second voltage specification, so that an appropriate charging voltage is obtained. It occurs to the first energy storage element BAT1 and / or the second energy storage element BAT2. Therefore, by adjusting the _third output voltage V3 provided to the booster circuit B1, the charging device 100 can have a wide voltage output range so as to charge each type of battery.

In one embodiment, when the first energy storage device BAT1 battery specifications of the second energy storage device BAT2 are the same, the third output voltage V ₃ is the first energy storage device BAT1 / second energy It is the difference between the storage element BAT2 and the output voltage of the charging device 100.

  Please refer to FIG. FIG. 2 is a configuration diagram illustrating a first energy storage element BAT1 according to an embodiment of the present invention. In this embodiment, the first energy storage element BAT1 is a battery pack having a plurality of battery cells bat_1 to bat_5 and the like. Of these, the number of battery cells is not limited to the present invention, but is only a schematic one, and the second energy storage element BAT2 has the same configuration as the first energy storage element BAT1 shown in FIG. There may be.

  The first energy storage element BAT1 includes a thermistor R1 and an internal chip IC_1. The thermistor R1 is a thermistor having a negative temperature coefficient (NTC) characteristic, and the internal chip IC_1 is abnormal in each battery cell in the first energy storage element BAT1 (for example, a short circuit or a voltage is safe) It is possible to detect whether it is lower than a certain range. When the detection result indicates that each battery cell is normal, the voltage signal is provided to the processing unit P1. Next, the processing unit P1 detects the voltage specification of the energy storage element and starts to control the charging device 100 to charge the first energy storage element BAT1.

During the charging of the first energy storage element BAT1 and / or the second energy storage element BAT2, the processing unit P1 immediately detects the current voltage value of each battery cell and immediately detects the battery cell bat_1. Based on the series voltage value of ˜bat_5, the booster circuit B1 can be controlled to adjust the _third output voltage V3 at that time. In addition, during the charging of the first energy storage element BAT1 and / or the second energy storage element BAT2, the processing unit P1 immediately takes the first charging current of the first energy storage element BAT1 and / or the second energy storage element BAT1. The booster circuit detects the second charging current of the energy storage element BAT2 and further adjusts the _third output voltage V3 at that time based on the first charging current and / or the second charging current. B1 can also be controlled to achieve a stable or favorable charging effect.

For a detailed circuit configuration of the charging device 100, refer to the circuit diagram of the charging device 100 according to an embodiment of the present invention shown in FIG. 3 embodiment, the input voltage V _in is provided to the input terminal of the input winding W1, the first being transformed by the first output winding W2-1 and second output winding W2-2 generating an output voltages _{V 1} and the second output voltage _{V 2.}

  In FIG. 3, the charging device 100 includes a first balanced capacitor C1 and a second balanced capacitor C2. The first balanced capacitor C1 is provided at the output terminal of the first output winding W2-1, and the second balanced capacitor C2 is provided at the output terminal of the second output winding W2-2. The first balanced capacitor C1 and the second balanced capacitor C2 are for balancing the voltage difference between the first energy storage element BAT1 and the second energy storage element BAT2. By providing the first balanced capacitor C1 and the second balanced capacitor C2, the output voltage of the charging device 100 can be more stable.

  Further, the currents of the first energy storage element BAT1 and the second energy storage element BAT2 may be unbalanced. Therefore, in the embodiment of FIG. 3, the first output winding W2-1 is connected to the second output winding between the first output winding W2-1 and the second output winding W2-2. A magnetic element LB including balanced windings B1-1 and B1-2 for electrical connection to W2-2 is further provided. Among them, since the balanced windings B1-1 and B1-2 are chokes, in order to balance the output currents of the first output winding W2-1 and the second output winding W2-2. Can be used.

From the above examples, the booster circuit B1 includes a third winding W3, the third winding W3 is transforms an input voltage V _in conjunction with input winding W1 provides an output voltage V _{3 '} The output voltage V ₃ ′ further generates a _third output voltage V ₃ based on the control of the processing unit P1. Further, the booster circuit B1 includes a switch unit S1, and the switch unit S1 is a metal-oxide-semiconductor field effect transistor (MOSFET) switch or a bipolar junction transistor (BJT) switch. Any element that can be used as such a switch may be used. The switch unit S1 includes a gate terminal G1 that is electrically connected to the processing unit P1. The gate terminal G1 of the switch unit S1 turns the switch unit S1 on and off based on the voltage level of the received signal. For example, when the received signal voltage is larger than the threshold value, the switch unit S1 is turned on, and in the opposite case, it is not turned on. This is the basic operating principle of a typical transistor switch.

Thus, the processing unit P1 can control the on / off time ratio of the switch unit S1 to adjust the further charging effect on the energy storage element of the _third output voltage V3 by generating a control signal. it can. As an example, the processing unit P1 can generate a clock signal for controlling on and off of the switch unit S1. When the clock signal is at a high voltage level, the switch unit S1 is turned on. When the clock signal is at a low voltage level, the switch unit S1 is turned off.

作動周期Ｄが０〜１の間にある。例として、作動周期Ｄが０であり、即ち一時間周期において、スイッチユニットＳ１がオフ状態を保持すると、この時、第３の出力電圧であるＶ_３は、元の出力電圧Ｖ_３’に等しい。作動周期Ｄが０.９であり、即ち一時間周期において、スイッチユニットＳ１がオン状態の時間が時間周期全体の９０％を占める場合、第３の出力電圧Ｖ_３がＶ_３’×(１／(１−０.９))に等しく、即ち、第３の出力電圧Ｖ_３の値が出力電圧Ｖ_３’の１０倍に等しい。よって、処理ユニットＰ１がスイッチユニットＳ１のオンとオフ時間を制御するためのクロック信号を発生することによって、所要の昇圧電圧（第３の出力電圧Ｖ_３）を発生するように昇圧回路Ｂ１を制御できる。 Among them, the output voltage V ₃ ′ is further adjusted by the control of the switch unit S1 by the processing unit P1 to generate the third output voltage V ₃ . Switch unit S1 is rate / operation period occupied on time in one-hour period is D, the relationship of the ratio between operating cycle D of the first 3 V ₃ output a voltage of the original output voltage V _{3 'is} less It is as follows.

The operating period D is between 0 and 1. As an example, operation cycle D is 0, i.e., in one-hour period, the switch unit S1 is maintained in the OFF state, when this, V ₃ is the third output voltage is equal to the original output voltage V _{3 '} . When the operating period D is 0.9, that is, in one time period, when the switch unit S1 is on for 90% of the entire time period, the third output voltage V ₃ is V ₃ ′ × (1 / (1-0.9)) equally, i.e., the value of the third output voltage _{V 3} is equal to 10 times the output voltage _{V 3} '. Therefore, the processing unit P1 generates the clock signal for controlling the on and off times of the switch unit S1, thereby controlling the booster circuit B1 so as to generate a required boosted voltage (third output voltage V ₃ ). it can.

Then, the charging device 100, the third output voltage _{V 3} first output voltages _{V 1} and by superimposing the second output voltage _{V 2,} the first energy storage device BAT1 respectively second energy storage The element BAT2 is charged. Specifically, the first energy storage element BAT1 receives the superimposed charging voltage V ₁ + V ₃ , and the second energy storage element BAT2 receives the superimposed charging voltage V ₂ + V ₃ .

In an embodiment of the present invention, when the first energy storage element BAT1 and / or the second energy storage element BAT2 is connected to the charging device 100, the first energy storage element BAT1 and / or the second energy storage element. The plus side and minus side of the element BAT2 are electrically connected to the processing unit P1 as shown in FIG. Here, please refer to FIG. 4 together. FIG. 4 is a partial circuit diagram showing the processing unit P1 of one embodiment according to the present invention. The processing unit P1 includes a charging current detection resistor R _sense , an amplifier AMP1, and a comparator CP1. Of these, an auxiliary voltage can be generated to supply power to the processing unit P1 by adding a winding (not shown) to the primary side of the transformer unit of the charging apparatus 100, but the present invention is limited to this. Instead, the auxiliary voltage may be converted from the internal circuit of the charging apparatus 100 by a different power generation mechanism, or may be supplied using an additional independent power source.

If the first energy storage device BAT1 and / or second energy storage device BAT2 are connected to the processing unit P1, the processing unit P1, the first output voltage _{V 1,} and the second output voltage _{V 2,} The negative voltage V _{BAT− of} the first energy storage element BAT1 and / or the second energy storage element BAT2 is _received . By detecting the first output voltage V ₁ and the second output voltage V ₂ , the processing unit P 1 has the first energy storage element BAT 1 and / or the second energy storage element BAT 2 already connected to the charging device 100. It can be judged whether it is done. As an example, when the detected first output voltage V ₁ and second output voltage V ₂ are not constant values, the first energy storage element BAT 1 and / or the second energy storage element BAT 2 are added to the charging device 100. Indicates not connected.

Next, the voltage V _BAT− is input to the amplifier AMP1 by the charging current detection resistor R _sense , then amplified to the voltage V _{AMP_BAT−} , and then input to the comparator CP1. The comparator CP1 has two input terminals and one output terminal. In the comparator CP1, the first input terminal receives the clock signal V _sig generated by the processing unit P1, the second input terminal receives the voltage V _{AMP_BAT−} and the voltage V _{I_BAT} , and the output terminal receives the control signal V _p. Is output. Among them, the voltage V _{I_BAT} corresponds to the initial value of the charging current, and the clock signal V _sig is generated by, for example, a microprocessor or a system chip (System on Chip, SoC) (not shown) provided in the processing unit P1.

The comparator CP1 compares the clock signal V _sig with the voltage V _{AMP_BAT−,} and when the voltage level of the clock signal V _sig is higher than the voltage level of the voltage V _{AMP_BAT−} , the switch unit S1 is turned on from the output terminal of the comparator CP1. As a result, the control signal V _p at the high voltage level is output. When the voltage level of the clock signal V _sig is lower than the voltage level of the voltage V _{AMP_BAT−} , the low voltage level control signal V _p is output from the output terminal of the comparator CP1 so as to turn off the switch unit S1. Thus, the processing unit P1 is capable of generating a control signal _{V p} on the basis of the voltage _{V AMP_BAT-} and the clock signal _{V sig.}

Among them, since the output terminal of the comparator CP1 is connected to the gate terminal G1 of the switch unit S1 of the booster circuit B1, the control signal V _p which is output from the comparator CP1 is in control of the operation period of the switch unit S1 in the step-up circuit B1 it can be used, i.e., to control the rate of the on and off times of the switch unit S1, it is possible to further adjust the third output voltage V _3.

In another embodiment of the present invention, the booster circuit B1 is not necessarily required to generate the _third output voltage V3 by the third winding W3, but the third output voltage via an external power source (not shown). it may be applied as a power source of V _3. The external power supply may be a power provided by a commercial power supply, a power supply unit, a generator, or the like, but the present invention is not limited to this.

  In another embodiment of the present invention, as shown in FIG. 5, the first energy storage element BAT1 and the second energy storage element BAT2 may be charged using a single output winding. FIG. 5 is a circuit diagram illustrating a charging device 500 according to an embodiment of the present invention. The charging device 500 includes an input winding W1 and a first output winding W2-1 that are similar to the charging device 100. Unlike charging device 100, first output winding W2-1 of charging device 500 has two output terminals for charging first energy storage element BAT1 and second energy storage element BAT2, respectively. .

In this embodiment, the first energy storage element BAT1 and the second energy storage element BAT2 are batteries having the same specifications. The first balance capacitor C1 includes battery cells in the first energy storage element BAT1 and the second energy storage element BAT2 so as to charge the first energy storage element BAT1 and the second energy storage element BAT2 in a balanced manner. Can be used to balance small voltage differences that may exist between the two. The booster circuit B1 simultaneously provides the _third output voltage V3 to the two output terminals of the first output winding W2-1.

  From the above example, the charging device 500 may include more output windings. Each output winding has one or two output terminals so as to charge a plurality of energy storage elements. Thus, the number of output windings may be half the number of charging output ports so as to reduce the volume of the charging device and significantly reduce costs.

  The embodiments of the present invention have been disclosed as described above, but are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention is based on the contents specified in the claims for utility model registration.

100: charging device 500: charging device AMP1: amplifier B1: booster circuit BAT1: first energy storage element BAT2: second energy storage elements bat_1, bat_2, bat_3, bat_4, bat_5: battery cells B1-1, B1-2 : equilibrium winding C1: first balanced capacitor C2: second balanced capacitors CP1: comparator G1: gate terminal IC_1: the chip LB: magnetic element P1: the processing unit R1: thermistor _{R sense:} charging current detection resistor S1: switch Unit V ₁ : First output voltage V ₂ : Second output voltage V ₃ : Third output voltage V ₃ ′: Output voltage V _{AMP_BAT−} , V _BAT− , V _{I_BAT} : Voltage V _in : Input voltage V _p : control signal _{V sig:} clock signal W1: input winding W2-1: first output winding W -2: The second output winding

Claims (10)

An input winding that receives the input voltage;
A first output winding electrically connected to the first energy storage element and transforming the input voltage to provide a first output voltage;
A second output winding electrically connected to the second energy storage element and transforming the input voltage to provide a second output voltage;
Providing a third output voltage for charging the first energy storage element after being superimposed with the first output voltage and for charging the second energy storage element after being superimposed with the second output voltage A step-up circuit electrically connected to the first output winding and the second output winding;
Including charging device.   When the first energy storage element and the second energy storage element are connected to the charging device, a first voltage specification of the first energy storage element and a second voltage of the second energy storage element 2. The charging device according to claim 1, further comprising a processing unit that detects a voltage specification, and wherein the booster circuit adjusts the third output voltage based on the first voltage specification and the second voltage specification.   During charging of the first energy storage element and the second energy storage element, the processing unit immediately instantiates the first charging current of the first energy storage element and the second energy storage element. 3. The charging device according to claim 2, wherein the boosting circuit adjusts the third output voltage based on the first charging current and the second charging current by detecting a charging current of 2.   Each of the first energy storage element and the second energy storage element is a battery pack including a plurality of battery cells, and during the charging of the first energy storage element and the second energy storage element, The processing unit immediately detects the voltage value of each of these battery cells, and the booster circuit adjusts the third output voltage based on the voltage value of each of these battery cells. The charging device described.   The booster circuit includes a switch unit including a gate terminal electrically connected to the processing unit, and the processing unit further controls the voltage value of the third output voltage to control the voltage value of the third output voltage. The charging apparatus according to claim 2, wherein a control signal for controlling a time ratio of on and off is generated.   2. A magnetic element for balancing currents of the first output winding and the second output winding is provided between the first output winding and the second output winding. The charging device described in 1.   The charging device according to claim 6, wherein the magnetic element includes two balanced windings for electrically connecting the first output winding to the second output winding.   A first balanced capacitor provided at an output terminal of the first output winding for balancing a voltage difference of the first energy storage element, and provided at an output terminal of the second output winding. The charging device according to claim 1, further comprising: a second balancing capacitor for balancing a voltage difference between the second energy storage elements.   The charging device according to claim 1, wherein the booster circuit further includes a third winding that transforms the input voltage to provide the third output voltage.   The charging device according to claim 1, wherein the booster circuit further includes an external power supply that provides the third output voltage.

Images