技术领域technical field
本发明涉及电池管理技术领域，特别涉及一种电池组电量均衡电路及均衡方法，适用于串联的充电电池组。The invention relates to the technical field of battery management, in particular to a battery pack power balancing circuit and a balancing method, which are suitable for series rechargeable battery packs.
背景技术Background technique
在新能源体系中，电池系统是其中不可缺少的重要组成部分，近年来，以锂电池为动力的电动自行车、混合动力汽车、电动汽车、燃料电池汽车等以高能量密度、高重复循环使用次数、重量轻及绿色环保等优势受到人们的关注。电池使用过程的安全与可靠性控制的关键在于电池管理系统，不仅要保证电池安全可靠的使用，而且要充分发挥电池的能力和延长使用寿命。一个电池组通常包括几个相互串联的电池单元，由于每个电池单元在充电状态、阻抗和温度特性等各方面的差异会造成这些电池单元之间的不平衡。这种不均衡现象使得整个电池组的容量减小、寿命缩短。因此，在电池组中需要应用电池均衡电路对其进行调节，以保持电池组的容量，延长电池组的寿命。In the new energy system, the battery system is an indispensable and important part. In recent years, electric bicycles, hybrid vehicles, electric vehicles, fuel cell vehicles, etc. , light weight and green environmental protection and other advantages have attracted people's attention. The key to the safety and reliability control of the battery use process lies in the battery management system, not only to ensure the safe and reliable use of the battery, but also to give full play to the battery's ability and prolong its service life. A battery pack usually includes several battery cells connected in series, and the imbalance among these battery cells will be caused by the difference of each battery cell in various aspects such as state of charge, impedance and temperature characteristics. This unbalanced phenomenon reduces the capacity and life of the entire battery pack. Therefore, it is necessary to apply a battery balancing circuit to regulate it in the battery pack to maintain the capacity of the battery pack and prolong the life of the battery pack.
针对串联电池可能出现的电量偏高，偏低问题，解决方案有并联电阻分流法、双向DC-DC均衡法、同轴变压器均衡法等均衡电路，但是这些电路都有变压器，使得电路成本增加。Aiming at the problem of high or low power that may occur in series batteries, solutions include parallel resistor shunt method, bidirectional DC-DC equalization method, coaxial transformer equalization method and other equalization circuits, but these circuits have transformers, which increase the circuit cost.
发明内容Contents of the invention
本发明的目的在于克服现有技术的缺点与不足，提供一种电池组电量均衡电路，用于保证电池组中的单体在充电和放电过程中不出现过充电和过放电为目的，从而改善串联电池组不均衡的现象，提高电池组的可用容量，减小串联电池组的维修和更换周期，延长电池组的使用寿命，降低EV，PHEV及蓄能电站的成本。The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, and provide a battery pack power balance circuit, which is used to ensure that the monomers in the battery pack will not be overcharged and overdischarged during the charging and discharging process, thereby improving The unbalanced phenomenon of series battery packs increases the available capacity of battery packs, reduces the maintenance and replacement cycle of series battery packs, prolongs the service life of battery packs, and reduces the cost of EV, PHEV and energy storage power stations.
本发明的另一目的在于提供一种电池组电量均衡方法。Another object of the present invention is to provide a method for balancing battery capacity.
本发明的目的通过以下的技术方案实现：The purpose of the present invention is achieved through the following technical solutions:
一种电池组电量均衡电路，用于均衡N个串联电池构成的电池组的电量，包括N-1个电池均衡单元电路、分别采集N个电池两端电压的N个电压采样电路、辅助电源模块、单片机控制模块和驱动模块；其中第K个电池均衡单元电路第一端口、第二端口、第三端口分别连接第K个电池的正极、第K个电池与第K+1个电池的连接处、第K+1个电池的负极；第K个电压采样电路、第K+1个电压采样电路分别采集第K个电池、第K+1个电池两端的电压，并传输至单片机控制模块，单片机控制模块经过计算后输出相应的驱动信号至驱动模块，驱动模块输出的驱动信号分别传输至第K个电池均衡单元电路，第K个电池均衡单元电路控制第K个电池放电、第K+1个电池充电或者第K个电池充电、第K+1个电池放电，使得第K个电池、第K+1个电池达到电量均衡，其中1≤K≤N-1。A battery pack power balancing circuit, which is used to balance the power of a battery pack composed of N batteries in series, including N-1 battery balancing unit circuits, N voltage sampling circuits for respectively collecting the voltages at both ends of N batteries, and an auxiliary power supply module , a single-chip microcomputer control module and a drive module; wherein the first port, the second port, and the third port of the Kth battery balancing unit circuit are respectively connected to the positive pole of the Kth battery, and the connection between the Kth battery and the K+1th battery , the negative electrode of the K+1th battery; the Kth voltage sampling circuit and the K+1th voltage sampling circuit respectively collect the voltages at both ends of the Kth battery and the K+1th battery, and transmit them to the single-chip microcomputer control module, the single-chip microcomputer After calculation, the control module outputs the corresponding driving signal to the driving module, and the driving signal output by the driving module is respectively transmitted to the Kth battery balancing unit circuit, and the Kth battery balancing unit circuit controls the discharge of the Kth battery, the K+1th battery The battery is charged or the Kth battery is charged and the K+1th battery is discharged, so that the Kth battery and the K+1th battery reach a power balance, where 1≤K≤N-1.
所述电池均衡单元电路，均包括包括第一开关管、第二开关管、第一二极管、第二二极管、第一电容、第一电感、第二电感，第一二极管反并联在第一开关管上，第二二极管反并联在第二开关管上，第一电感的一端与第一电池的正极相连，第一电感的另一端与第一电容的正极和第一开关管的漏极相连，第一开关管的源极与第一电池的负极、第二电池的正极相连，第二开关管的源极与第二电池的正极相连，第二开关管的漏极与第一电容的负极相连，第一电容的负极同时接第二电感的一端；第二电感的另一端与第二电池的负极相连；第一电压传感器采样第一电池的端电压Ub1；第二电压传感器采样第二电池的端电压Ub2。The battery balancing unit circuit includes a first switch tube, a second switch tube, a first diode, a second diode, a first capacitor, a first inductor, a second inductor, and the first diode connected in parallel to the first switching tube, the second diode is anti-parallel connected to the second switching tube, one end of the first inductor is connected to the positive pole of the first battery, and the other end of the first inductor is connected to the positive pole of the first capacitor and the first The drains of the switching tubes are connected, the source of the first switching tube is connected with the negative pole of the first battery and the positive pole of the second battery, the source of the second switching tube is connected with the positive pole of the second battery, and the drain of the second switching tube It is connected to the negative pole of the first capacitor, and the negative pole of the first capacitor is connected to one end of the second inductor at the same time; the other end of the second inductor is connected to the negative pole of the second battery; the first voltage sensor samples the terminal voltage Ub1 of the first battery; the second The voltage sensor samples the terminal voltage Ub2 of the second battery.
所述辅助电源模块包括第一整流桥、第三电容、第四电容、第五电容、第一电阻、第二电阻、用于输出15V直流电压的第一稳压芯片和用于输出5V直流电压的第二稳压芯片；其中第二整流桥上端、下端分别接输入电源VAC的两端，左端与第五电容的正极连接，右端与第五电容的负极连接；第三电容的正极端接第一稳压芯片的输入端，第一稳压芯片的输出端接第二稳压芯片的输入端，第二稳压芯片的输出端与单片机控制模块和驱动模块的输入端连接；第一稳压芯片的接地端与第二电阻一端连接，第二电阻的另一端接地；第一电阻的一端与第二电阻的一端连接，另一端接第一稳压芯片的输出端；第四电容接第二稳压芯片的输入端，另一端接地；第五电容的正极端接第二稳压芯片的输出端，另一端接地。The auxiliary power supply module includes a first rectifier bridge, a third capacitor, a fourth capacitor, a fifth capacitor, a first resistor, a second resistor, a first regulator chip for outputting a 15V DC voltage and a chip for outputting a 5V DC voltage The second voltage stabilizing chip; wherein the upper end and lower end of the second rectifier bridge are respectively connected to the two ends of the input power VAC, the left end is connected to the positive pole of the fifth capacitor, and the right end is connected to the negative pole of the fifth capacitor; the positive end of the third capacitor is connected to the first The input end of a voltage stabilizing chip, the output end of the first voltage stabilizing chip is connected to the input end of the second voltage stabilizing chip, the output end of the second voltage stabilizing chip is connected with the input end of the single-chip microcomputer control module and the drive module; the first voltage stabilizing chip The ground end of the chip is connected to one end of the second resistor, and the other end of the second resistor is grounded; one end of the first resistor is connected to one end of the second resistor, and the other end is connected to the output end of the first voltage regulator chip; the fourth capacitor is connected to the second The input end of the voltage stabilizing chip is connected to the other end; the positive end of the fifth capacitor is connected to the output end of the second voltage stabilizing chip, and the other end is grounded.
所述驱动模块包括2×(N-1)个结构相同的驱动信号判断电路，每个驱动信号判断电路均包括第三电阻、第六电容、第一与门、第一驱动隔离电路；单片机控制模块输出的控制信号连接到第三电阻和第一与门的一个输入端；第三电阻的另一端接第一与门的另一输入端和第六电容的一端，第六电容的另一端接地；第一与门的输出接第一驱动隔离电路。The drive module includes 2×(N-1) drive signal judging circuits with the same structure, and each drive signal judging circuit includes a third resistor, a sixth capacitor, a first AND gate, and a first drive isolation circuit; The control signal output by the module is connected to the third resistor and one input terminal of the first AND gate; the other terminal of the third resistor is connected to the other input terminal of the first AND gate and one terminal of the sixth capacitor, and the other terminal of the sixth capacitor is grounded ; The output of the first AND gate is connected to the first drive isolation circuit.
所述驱动隔离电路包括第一三极管、第二三极管、第七电容、第一变压器、第四电阻；第一三极管的基极和第二三极管的基极相连后连接第一与门的输出；第一三极管的发射极和第二三极管的发射极相连后与第七电容的一端相连，第一三极管的集电极接辅助电源模块中第一稳压芯片的输出，第二三极管的集电极与第一变压器的一个输入端相连后接地，第七电容的另一端接第一变压器的另一输入端；第一变压器的一个输出端与第四电阻的一端相连，另一端接主电路开关管的源极，第四电阻的另一端接主电路开关管的门极。The drive isolation circuit includes a first transistor, a second transistor, a seventh capacitor, a first transformer, and a fourth resistor; the base of the first transistor is connected to the base of the second transistor and then connected to The output of the first AND gate; the emitter of the first triode is connected to the emitter of the second triode and then connected to one end of the seventh capacitor, and the collector of the first triode is connected to the first steady state in the auxiliary power supply module The output of the pressure chip, the collector of the second triode is connected to an input end of the first transformer and then grounded, and the other end of the seventh capacitor is connected to the other input end of the first transformer; an output end of the first transformer is connected to the first transformer One end of the four resistors is connected, the other end is connected to the source of the switching tube of the main circuit, and the other end of the fourth resistor is connected to the gate of the switching tube of the main circuit.
本发明的另一目的通过以下的技术方案实现：Another object of the present invention is achieved through the following technical solutions:
电池组电量均衡电路的电池组电量均衡方法，包含以下顺序：The battery pack power balance method of the battery pack power balance circuit includes the following sequence:
S1.第K个电压采样电路、第K+1个电压采样电路分别采集第K个电池、第K+1个电池两端的电压，并传输至单片机控制模块；S1. The Kth voltage sampling circuit and the K+1th voltage sampling circuit respectively collect the voltages at both ends of the Kth battery and the K+1th battery, and transmit them to the single-chip microcomputer control module;
S2.单片机控制模块经过计算后输出相应的驱动信号至驱动模块，驱动模块输出的驱动信号分别传输至第K个电池均衡单元电路；S2. After calculation, the single-chip control module outputs a corresponding driving signal to the driving module, and the driving signal output by the driving module is respectively transmitted to the Kth battery balancing unit circuit;
S3.第K个电池均衡单元电路控制第K个电池放电、第K+1个电池充电或者第K个电池充电、第K+1个电池放电，使得第K个电池、第K+1个电池达到电量均衡，其中1≤K≤N-1，N为电池组串联的电池数量。S3. The Kth battery balancing unit circuit controls the discharge of the Kth battery, the charging of the K+1th battery, or the charging of the Kth battery and the discharge of the K+1th battery, so that the Kth battery and the K+1th battery To achieve power balance, where 1≤K≤N-1, N is the number of batteries connected in series in the battery pack.
本发明与现有技术相比，具有如下优点和有益效果：Compared with the prior art, the present invention has the following advantages and beneficial effects:
本发明能够保证电池组中的单体在充电和放电过程中不出现过充电和过放电为目的，从而改善串联电池组不均衡的现象，提高电池组的可用容量，减小串联电池组的维修和更换周期，延长电池组的使用寿命，降低EV，PHEV及蓄能电站的成本。The purpose of the invention is to ensure that the cells in the battery pack are not overcharged and overdischarged during charging and discharging, thereby improving the unbalanced phenomenon of the battery pack in series, increasing the available capacity of the battery pack, and reducing the maintenance of the battery pack in series And replacement cycle, prolong the service life of the battery pack, reduce the cost of EV, PHEV and energy storage power station.
当电池组中任何一个单体能量过高或过低时，通过电池均衡单元电路的开关通断使其与相邻的电池达到电量均衡，然后用若干个均衡单元电路实现电池组的总体均衡。When the energy of any single cell in the battery pack is too high or too low, the switch of the battery balancing unit circuit is switched on and off to achieve power balance with the adjacent batteries, and then several balancing unit circuits are used to achieve the overall balance of the battery pack.
附图说明Description of drawings
图1为本发明所述电池组电量均衡电路的结构示意图。FIG. 1 is a schematic structural diagram of the electric balance circuit of the battery pack according to the present invention.
图2为本发明的辅助电源模块的电路图。Fig. 2 is a circuit diagram of the auxiliary power supply module of the present invention.
图3为本发明的驱动模块的电路图。FIG. 3 is a circuit diagram of the driving module of the present invention.
图4为本发明的驱动模块中的驱动隔离电路图。Fig. 4 is a circuit diagram of the driving isolation in the driving module of the present invention.
图5为本发明所述电池均衡单元电路的电路图。FIG. 5 is a circuit diagram of the battery balancing unit circuit of the present invention.
具体实施方式detailed description
下面结合实施例及附图对本发明作进一步详细的描述，但本发明的实施方式不限于此。The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
图1给出了本发明示例的一种电池均衡电路的结构示意图，其中包括主电路，辅助电源模块，单片机控制模块(可采用常用的单片机)，驱动模块。主电路包括N节串联连接的铅酸电池或锂离子电池，第一～第(N-1)均衡单元电路，如图5，每一个均衡单元电路都分别与相邻的两个电池的三个端点(正极、正负极连接点、负极)相连，第一均衡单元电路包括第一开关管、第二开关管、第一二极管、第二二极管、第一电容、第一电感、第二电感，第一二极管反并联在第一开关管上，第二二极管反并联在第二开关管上，第一电感的一端与电池1的正极相连，第一电感的另一端与第一电容的正极和第一开关管的漏极相连，第一开关管的源极与电池1的负极和电池2的正极相连，第二开关管的源极与电池2的正极相连，第二开关管的漏极与第一电容的负极相连，第一电容的负极同时接第二电感的一端；第二电感的另一端与电池2的负极相连；第一电压传感器采样电池1的端电压Ub1；第二电压传感器采样电池2的端电压Ub2，第二～第(N-1)个均衡电路单元具有与第一均衡电路单元相同的结构。采样电路包括N个相同的电压传感器电路，第N电压传感器的输入和第N电池两端并联，第N电压传感器的输出接单片机控制模块的电池N端电压UbN采样输入端。辅助电源模块将220V的交流电压转化为15V和5V的直流电压输出，作为单片机控制模块和驱动模块的辅助电源。如图中的均衡单元电路1所示，若电池1的电压Ub1大于电池2的电压Ub2，则给第一开关管Q1开通信号，电池1通过第一电感L1和第一开关管Q1放电，从而使电池1的端电压降低，同时，第一电容、第一开关、第二电感、电池2形成回路，第一电容对电池2进行充电，从而使电池2的端电压升高；若电池1的电压Ub1小于电池2的电压Ub2，则给第二开关管Q2开通信号，电池2通过第二电感L2和第二开关管Q2放电，从而使电池2的端电压降低，同时，第一电容、第一电感、电池1、第二开关形成回路，第一电容对电池1进行充电，从而使电池1的端电压升高；通过调整第一开关管和第二开关管的导通时间实现电池1和电池2的电量的自动均衡。以此类推，此电池均衡单元电路可以实现任意偶数个串联电池组成的电池组电量均衡。Fig. 1 has provided the structure schematic diagram of a kind of battery balancing circuit of the example of the present invention, comprises main circuit, auxiliary power supply module, single-chip microcomputer control module (commonly used single-chip microcomputer can be used), drive module wherein. The main circuit includes N lead-acid batteries or lithium-ion batteries connected in series, and the first to (N-1) equalizing unit circuits, as shown in Figure 5, each equalizing unit circuit is connected to three adjacent two batteries respectively. The terminals (positive pole, positive and negative connection point, negative pole) are connected, and the first equalization unit circuit includes a first switch tube, a second switch tube, a first diode, a second diode, a first capacitor, a first inductor, The second inductance, the first diode is connected in anti-parallel to the first switching tube, the second diode is connected in anti-parallel to the second switching tube, one end of the first inductance is connected to the positive pole of the battery 1, and the other end of the first inductance It is connected to the positive pole of the first capacitor and the drain of the first switching tube, the source of the first switching tube is connected to the negative pole of the battery 1 and the positive pole of the battery 2, the source of the second switching tube is connected to the positive pole of the battery 2, and the second switching tube is connected to the positive pole of the battery 2. The drain of the two switching tubes is connected to the negative pole of the first capacitor, and the negative pole of the first capacitor is connected to one end of the second inductor at the same time; the other end of the second inductor is connected to the negative pole of the battery 2; the first voltage sensor samples the terminal voltage of the battery 1 Ub1; the second voltage sensor samples the terminal voltage Ub2 of the battery 2, and the second to (N-1)th equalizing circuit units have the same structure as the first equalizing circuit unit. The sampling circuit includes N identical voltage sensor circuits, the input of the Nth voltage sensor is connected in parallel with the two ends of the Nth battery, and the output of the Nth voltage sensor is connected to the battery N-terminal voltage UbN sampling input of the single-chip microcomputer control module. The auxiliary power supply module converts the 220V AC voltage into 15V and 5V DC voltage outputs, and serves as the auxiliary power supply for the single-chip microcomputer control module and the drive module. As shown in the balance unit circuit 1 in the figure, if the voltage Ub1 of the battery 1 is greater than the voltage Ub2 of the battery 2, a signal is turned on to the first switch tube Q1, and the battery 1 is discharged through the first inductor L1 and the first switch tube Q1, thereby The terminal voltage of the battery 1 is reduced, and at the same time, the first capacitor, the first switch, the second inductor, and the battery 2 form a loop, and the first capacitor charges the battery 2, thereby increasing the terminal voltage of the battery 2; if the battery 1 If the voltage Ub1 is lower than the voltage Ub2 of the battery 2, a signal is turned on to the second switch tube Q2, and the battery 2 is discharged through the second inductor L2 and the second switch tube Q2, so that the terminal voltage of the battery 2 is reduced. At the same time, the first capacitor, the second capacitor An inductor, the battery 1, and the second switch form a loop, and the first capacitor charges the battery 1, thereby increasing the terminal voltage of the battery 1; by adjusting the conduction time of the first switch tube and the second switch tube, the battery 1 and the second switch tube are adjusted. Automatic equalization of the electric quantity of battery 2. By analogy, the battery equalization unit circuit can realize the power balance of a battery pack composed of any even number of batteries connected in series.
图2给出了本发明电池均衡电路的辅助电源模块的电路图，辅助电源模块包括整流桥Bridge，第三电容C3、第四电容C4、第五电容C5，第一电阻R1、第二电阻R2。用于输出15V直流电压的第一稳压芯片TL783和用于输出5V直流电压的第二稳压芯片7805。整流桥Bridge上下两端分别接输入电源Vac的AC+与AC-两端，两端分别与第三电容的两端相接。第三电容的正极端接第一稳压芯片的Vin1端，第一稳压芯片的输出端Vout1接第二稳压芯片的输入端Vin2，第二稳压芯片的输出端Vout2与单片机模块和驱动模块的输入端Vcc连接。第一稳压芯片的接地端与第二电阻一端相接，第二电阻的另一端接地。第一电阻的一端与第二电阻的一端连接，另一端接第一稳压芯片的输出端。第四电容的正极接第二稳压芯片的输入端，另一端接地。第五电容的正极端接第二稳压芯片的输出端，另一端接地。整流桥将220V的交流电压整流成直流电压，第一电阻和第二电阻的阻值调节TL783输出电压的大小，第四电容为第一稳压芯片TL783的输出滤波电容和第二稳压芯片7805的输入滤波电容，第五电容为第二稳压芯片的输出滤波电容，稳压芯片TL783和7805分别输出15V和5V的直流电压，作为系统内部各控制电路的电源。Fig. 2 shows the circuit diagram of the auxiliary power module of the battery balancing circuit of the present invention, the auxiliary power module includes a rectifier bridge Bridge, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a first resistor R1, and a second resistor R2. The first voltage regulator chip TL783 for outputting 15V DC voltage and the second voltage regulator chip 7805 for outputting 5V DC voltage. The upper and lower ends of the rectifier bridge Bridge are respectively connected to the AC+ and AC- ends of the input power Vac, and the two ends are respectively connected to the two ends of the third capacitor. The positive end of the third capacitor is connected to the Vin1 terminal of the first voltage stabilizing chip, the output terminal Vout1 of the first voltage stabilizing chip is connected to the input terminal Vin2 of the second voltage stabilizing chip, and the output terminal Vout2 of the second voltage stabilizing chip is connected to the microcontroller module and the driver The input terminal Vcc of the module is connected. The ground end of the first voltage stabilizing chip is connected to one end of the second resistor, and the other end of the second resistor is grounded. One end of the first resistor is connected to one end of the second resistor, and the other end is connected to the output end of the first voltage stabilizing chip. The positive pole of the fourth capacitor is connected to the input terminal of the second voltage stabilizing chip, and the other terminal is grounded. The positive terminal of the fifth capacitor is connected to the output terminal of the second voltage stabilizing chip, and the other terminal is grounded. The rectifier bridge rectifies the 220V AC voltage into DC voltage, the resistance of the first resistor and the second resistor adjusts the output voltage of TL783, the fourth capacitor is the output filter capacitor of the first voltage regulator chip TL783 and the second voltage regulator chip 7805 The fifth capacitor is the output filter capacitor of the second voltage regulator chip, and the voltage regulator chips TL783 and 7805 output DC voltages of 15V and 5V respectively, as the power supply of each control circuit inside the system.
图3给出了驱动模块的电路图，驱动模块包括第三电阻R3、第六电容C6、第一与门U1以及第一驱动隔离电路。单片机控制模块输出的驱动信号分别连接第三电阻的一端和第一与门。第三电阻的另一端接第一与门的一端和第六电容的一端，第六电容的另一端接地；第一与门的输出接第一驱动隔离电路。FIG. 3 shows a circuit diagram of the driving module. The driving module includes a third resistor R3, a sixth capacitor C6, a first AND gate U1 and a first driving isolation circuit. The drive signal output by the single-chip microcomputer control module is respectively connected to one end of the third resistor and the first AND gate. The other end of the third resistor is connected to one end of the first AND gate and one end of the sixth capacitor, and the other end of the sixth capacitor is grounded; the output of the first AND gate is connected to the first driving isolation circuit.
图4给出了驱动模块中驱动隔离的电路图，驱动隔离电路包括第一三极管VT1、第二三极管VT2、第七电容C7、第一变压器T1、第四电阻R4；第一三极管的基极和第二三极管的基极相连后连接第一与门的输出；第一三极管的发射极和第二三极管的发射极相连后与第七电容的一端相连，第一三极管的集电极接辅助电源模块中第一稳压芯片的输出，第二三极管的集电极与第一变压器的一个输入端相连后接地，第七电容的另一端接第一变压器的另一输入端；第一变压器的一个输出端与第四电阻的一端相连，另一端接主电路所驱动的开关管的源极，第四电阻的另一端接主电路所驱动开关管的门极。当驱动信号的高电平到来时，第一三极管导通，由于第一变压器的作用，驱动信号1输出高电平，驱动开关管导通；当驱动信号为低电平时，第二三极管导通，第一变压器输入为低电平，驱动信号1输出低电平，驱动开关管关断。Figure 4 shows the circuit diagram of the drive isolation in the drive module. The drive isolation circuit includes the first triode VT1, the second triode VT2, the seventh capacitor C7, the first transformer T1, and the fourth resistor R4; the first triode The base of the transistor is connected to the base of the second triode and then connected to the output of the first AND gate; the emitter of the first triode is connected to the emitter of the second triode and then connected to one end of the seventh capacitor, The collector of the first triode is connected to the output of the first regulator chip in the auxiliary power supply module, the collector of the second triode is connected to an input end of the first transformer and grounded, and the other end of the seventh capacitor is connected to the first The other input end of the transformer; one output end of the first transformer is connected to one end of the fourth resistor, the other end is connected to the source of the switch tube driven by the main circuit, and the other end of the fourth resistor is connected to the switch tube driven by the main circuit gate pole. When the high level of the driving signal arrives, the first triode is turned on. Due to the action of the first transformer, the driving signal 1 outputs a high level, and the driving switch is turned on; when the driving signal is low, the second and third transistors are turned on. The pole tube is turned on, the input of the first transformer is low level, the driving signal 1 outputs low level, and the driving switch tube is turned off.
上述实施例为本发明较佳的实施方式，但本发明的实施方式并不受上述实施例的限制，其他的任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化，均应为等效的置换方式，都包含在本发明的保护范围之内。The above-mentioned embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above-mentioned embodiment, and any other changes, modifications, substitutions, combinations, Simplifications should be equivalent replacement methods, and all are included in the protection scope of the present invention.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610065329.5ACN105553026A (en) | 2016-01-29 | 2016-01-29 | Battery pack electricity equalization circuit and equalization method |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610065329.5ACN105553026A (en) | 2016-01-29 | 2016-01-29 | Battery pack electricity equalization circuit and equalization method |
| Publication Number | Publication Date |
|---|---|
| CN105553026Atrue CN105553026A (en) | 2016-05-04 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610065329.5APendingCN105553026A (en) | 2016-01-29 | 2016-01-29 | Battery pack electricity equalization circuit and equalization method |
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| CN (1) | CN105553026A (en) |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | Application publication date:20160504 | |
| WD01 | Invention patent application deemed withdrawn after publication |