CN108767949A - A kind of two-way active equalization of usable Switching Power Supply power supply manages system - Google Patents
A kind of two-way active equalization of usable Switching Power Supply power supply manages system Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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Abstract
本发明涉及电动汽车充放电技术领域，一种可使用开关电源供电的双向主动均衡管理系统，包括直流开关电源电路、均衡选通电路和均衡板；所述均衡板包括与直流开关电源电路相连的原边线路，以及与均衡选通电路相连的副边线路；所述的直流开关电源电路上还连接有供电电压监测单元和均衡控制单元；所述供电电压监测单元，用于对均衡板供电电压监测，当出现供电过压情况时，能够向均衡控制单元输出使能；所述均衡控制单元，能够控制均衡板的原边线路和副边线路通断和电流方向。该可使用开关电源供电的双向主动均衡管理系统可根据预设条件和监测反馈条件，系统自动控制均衡板充放电方向以及接入的单体电池(锂电池)数量，维护模块正常工作。
The invention relates to the technical field of charging and discharging of electric vehicles, and relates to a bidirectional active equalization management system that can be powered by a switching power supply, including a DC switching power supply circuit, a balancing gate circuit and a balancing board; the balancing board includes a DC switching power supply circuit connected The primary side line, and the secondary side line connected to the balanced gating circuit; the DC switching power supply circuit is also connected with a power supply voltage monitoring unit and a balanced control unit; the power supply voltage monitoring unit is used to supply voltage to the balanced board Monitoring, when there is a power supply overvoltage situation, it can output enable to the balance control unit; the balance control unit can control the on-off and current direction of the primary side line and the secondary side line of the balance board. The two-way active balance management system that can be powered by a switching power supply can automatically control the charging and discharging direction of the balance board and the number of connected single batteries (lithium batteries) according to preset conditions and monitoring feedback conditions, and maintain the normal operation of the module.
Description
技术领域technical field
本发明涉及电动汽车充放电技术领域，尤其涉及一种可使用开关电源供电的双向主动均衡管理系统。The invention relates to the technical field of electric vehicle charging and discharging, in particular to a bidirectional active equalization management system that can be powered by a switching power supply.
背景技术Background technique
锂离子电池具有高能量密度、高内阻、高电压、高循环次数和低自放电率等特性，但是其对保护电路的要求很高，过充、放电都会引起电池寿命的下降甚至导致电池损坏、发生事故。目前，锂离子电池已广泛应用于电动汽车上，如何保障电池组一致性，延长电池使用寿命及令电动车更安全，是亟需解决的问题。Lithium-ion batteries have the characteristics of high energy density, high internal resistance, high voltage, high cycle times and low self-discharge rate, but they have high requirements for protection circuits. Overcharging and discharging will cause battery life to decrease or even cause battery damage. ,have an accident. At present, lithium-ion batteries have been widely used in electric vehicles. How to ensure the consistency of battery packs, extend battery life and make electric vehicles safer is an urgent problem to be solved.
目前大部分BMS均采用均衡技术来保障锂离子电池组的一致性，少部分具有更高效的双向主动均衡技术，其理论是对锂离子电池能量进行转移。由于电池组内电池数量众多以及硬件成本考虑，采用储能器件进行能量中转是最常见的技术；在一般储能场景和特殊车辆应用场景下或电动汽车启动电源损坏的情况下，无储能器件进行能量中转，只采用开关电源供电。开关电源特性就是只是能单向输出能量(电流)装置，无法向内吸收能量，在进行主动均衡供电时，只能对模块供电，在主动均衡中可以对单体电池进行充电，但均衡中单体电池放出的电量会导致开关电源供电回路上产生反向电流，由于开关电源无法吸收，就到导致供电电压不断被抬高，最后导致开关电源和模块被保护或烧坏。At present, most BMSs use equalization technology to ensure the consistency of lithium-ion battery packs, and a few have more efficient two-way active equalization technology. The theory is to transfer the energy of lithium-ion batteries. Due to the large number of batteries in the battery pack and the consideration of hardware costs, the use of energy storage devices for energy transfer is the most common technology; in general energy storage scenarios and special vehicle application scenarios or when the starting power supply of electric vehicles is damaged, there is no energy storage device For energy transfer, only switching power supply is used for power supply. The characteristic of switching power supply is that it can only output energy (current) in one direction, and cannot absorb energy inward. When performing active balanced power supply, it can only supply power to the module. In active balanced power supply, single battery can be charged, but in balanced The power released by the body battery will cause a reverse current on the power supply circuit of the switching power supply. Since the switching power supply cannot absorb it, the power supply voltage will be continuously raised, and finally the switching power supply and the module will be protected or burned out.
发明内容Contents of the invention
为了解决上述问题，本发明的目的在于提供一种可使用开关电源供电的双向主动均衡管理系统，该可使用开关电源供电的双向主动均衡管理系统可使用开关电源供电，并可根据预设条件和监测反馈条件，系统自动控制均衡板充放电方向以及接入的单体电池(锂电池)数量，从而避免单体电池均衡放电导致开关电源和模块被保护或烧坏的问题，维护模块正常工作。In order to solve the above problems, the object of the present invention is to provide a two-way active equalization management system that can be powered by a switching power supply. The two-way active equalization management system that can be powered by a switching power supply can be powered by a switching power supply, and can Monitoring the feedback conditions, the system automatically controls the charging and discharging direction of the balancing board and the number of connected single batteries (lithium batteries), so as to avoid the problem that the switching power supply and modules are protected or burned due to the balanced discharge of single batteries, and maintain the normal operation of the modules.
为了实现上述的目的，本发明采用了以下的技术方案：In order to achieve the above object, the present invention adopts the following technical solutions:
一种可使用开关电源供电的双向主动均衡管理系统，包括直流开关电源电路、均衡选通电路和均衡板；所述均衡板包括与直流开关电源电路相连的原边线路，以及与均衡选通电路相连的副边线路，原边线路与副边线路互为感应线路；其特征在于：所述的直流开关电源电路上还连接有供电电压监测单元和均衡控制单元；所述供电电压监测单元，用于对均衡板供电电压监测，当出现供电过压情况时，能够向均衡控制单元输出使能；所述均衡板的原边线路上设有原边MOS管，均衡板的副边线路上设有副边MOS管，原边MOS管和副边MOS 管能够在直流电与交流电之间转换；所述的均衡选通电路包括多条并联支路，每条并联支路上均连接有单体电池和选通MOS管；所述均衡控制单元控制原边 MOS管和副边MOS管的开关频率，以及选通MOS管的开关；所述均衡控制单元，能够控制均衡板的原边线路和副边线路通断和电流方向；均衡控制单元构建的均衡回路中，处于放电状态的单体电池的均衡电流总量需小于或等于处于充电状态的单体电池的均衡电流总量。需要说明的是：此处所指的原边线路与副边线路互为感应线路，即指原边线路或副边线路产生交流电时，会在对方电路上产生感应电流，实际可理解为变压器。A bidirectional active balance management system that can be powered by a switching power supply, including a DC switching power supply circuit, a balanced gating circuit and a balanced board; the balanced board includes a primary side line connected to the DC switching power supply circuit, and a The connected secondary line, the primary line and the secondary line are induction lines; it is characterized in that: the DC switching power supply circuit is also connected with a power supply voltage monitoring unit and an equalization control unit; the power supply voltage monitoring unit is used For monitoring the power supply voltage of the balance board, when the power supply overvoltage occurs, the enable can be output to the balance control unit; the primary side line of the balance board is provided with a primary side MOS tube, and the secondary side line of the balance board is provided with a secondary side MOS tube, the primary side MOS tube and the secondary side MOS tube can switch between direct current and alternating current; the balanced gate circuit includes a plurality of parallel branches, and each parallel branch is connected to a single battery and a gate MOS tube; the equalization control unit controls the switching frequency of the primary side MOS tube and the secondary side MOS tube, and the switch of the gating MOS tube; the equalization control unit can control the primary side line and the secondary side line on-off and Current direction; in the equalization loop constructed by the equalization control unit, the total amount of balanced current of the single battery in the discharging state must be less than or equal to the total amount of balanced current of the single battery in the charged state. It should be noted that the primary circuit and the secondary circuit referred to here are mutual induction circuits, which means that when the primary circuit or the secondary circuit generates alternating current, an induced current will be generated on the other circuit, which can actually be understood as a transformer.
作为优选，所述均衡板设有多组，多组均衡板的原边线路并联在直流开关电源电路上，且设有多组均衡选通电路分别与多组均衡板的副边线路连接。Preferably, there are multiple sets of equalization boards, the primary side circuits of multiple sets of equalization boards are connected in parallel to the DC switching power supply circuit, and multiple sets of equalization gate circuits are respectively connected to the secondary side lines of multiple sets of equalization boards.
作为优选，所述均衡板的副边线路上还设有均衡电流采集功能模块；所述均衡电流采集功能模块对于主动均衡电流实时采集，并在过流时，向均衡控制单元输出使能。Preferably, a balanced current collection function module is also provided on the secondary circuit of the balanced board; the balanced current collection function module collects the active balanced current in real time, and outputs enable to the balanced control unit when the current is over-current.
作为优选，所述均衡选通电路上设有电压采集模块，所述电压采集模块用于采集单体电池电压，并将其反馈给均衡控制单元。Preferably, the equalization gating circuit is provided with a voltage acquisition module, and the voltage acquisition module is used to acquire the voltage of the single battery and feed it back to the equalization control unit.
本发明采用上述技术方案，该技术方案涉及一种可使用开关电源供电的双向主动均衡管理系统，该可使用开关电源供电的双向主动均衡管理系统中的供电电压监测单元用于对均衡板供电电压监测，均衡控制单元则可用于控制切换单个均衡板充放电方向和控制选通MOS管开启与关闭；因此采用该可使用开关电源供电的双向主动均衡管理系统即可根据预设条件和监测反馈条件，系统自动控制均衡板充放电方向以及接入的单体电池(锂电池)数量，从而可避免均衡过程中多余能量输入开关电源，可避免开关电源和可使用开关电源供电的双向主动均衡管理系统内模块被保护或烧坏的问题，保证系统正常工作。The present invention adopts the above technical solution, which relates to a two-way active equalization management system that can be powered by a switching power supply. The power supply voltage monitoring unit in the two-way active equalization management system that can be powered by a switching power supply is used to monitor the power supply voltage monitoring, and the balance control unit can be used to control and switch the charging and discharging direction of a single balance board and control the opening and closing of the strobe MOS tube; therefore, the bidirectional active balance management system that can be powered by a switching power supply can , the system automatically controls the charging and discharging direction of the balancing board and the number of single batteries (lithium batteries) connected, so as to avoid redundant energy input into the switching power supply during the balancing process, avoid switching power supply and use the two-way active balancing management system powered by switching power supply The problem of internal modules being protected or burned out ensures the normal operation of the system.
附图说明Description of drawings
图1为可使用开关电源供电的双向主动均衡管理系统处于两节电池均衡放电状态示意图。Figure 1 is a schematic diagram of a two-way active balance management system that can be powered by a switching power supply in a balanced discharge state of two batteries.
图2为可使用开关电源供电的双向主动均衡管理系统处于一节均衡充电，一节均衡放电状态示意图。Figure 2 is a schematic diagram of a two-way active equalization management system that can be powered by a switching power supply in a balanced charge state and a balanced discharge state.
具体实施方式Detailed ways
下面结合附图，对本发明的优选实施方案作进一步详细的说明。The preferred embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.
在本发明的描述中，需要理解的是，术语“上”、“下”、“前”、“后”、“左”、“右”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。In describing the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", " The orientation or positional relationship indicated by "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, so as to Specific orientation configurations and operations, therefore, are not to be construed as limitations on the invention.
如图1～2所示的一种可使用开关电源供电的双向主动均衡管理系统，包括直流开关电源电路a、均衡选通电路b和均衡板。所述均衡板包括与直流开关电源电路a相连的原边线路c，以及与均衡选通电路b相连的副边线路d，原边线路c与副边线路d互为感应线路，均衡选通电路b上设有单体电池。需要说明的是：此处所指的原边线路c与副边线路d互为感应线路，即指原边线路c或副边线路d产生交流电时，会在对方电路上产生感应电流，实际可理解为变压器1。在其中一种实施方式中，所述均衡板设有多组，多组均衡板的原边线路c并联在直流开关电源电路a上，且设有多组均衡选通电路b分别与多组均衡板的副边线路d连接。As shown in Figures 1-2, a bidirectional active equalization management system that can be powered by a switching power supply includes a DC switching power supply circuit a, an equalization gating circuit b and an equalization board. The balanced board includes a primary circuit c connected to the DC switching power supply circuit a, and a secondary circuit d connected to the balanced gating circuit b. The primary circuit c and the secondary circuit d are mutually inductive circuits, and the balanced gating circuit b is provided with a single battery. It should be noted that the primary circuit c and the secondary circuit d referred to here are mutual induction circuits, that is, when the primary circuit c or the secondary circuit d generates alternating current, an induced current will be generated on the other circuit, which can actually be Understand as Transformer 1. In one of the implementations, there are multiple sets of equalization boards, the primary side circuits c of multiple sets of equalization boards are connected in parallel to the DC switching power supply circuit a, and multiple sets of equalization gating circuits b are respectively connected to the multiple sets of equalization gate circuits b. The secondary circuit d of the board is connected.
所述的直流开关电源电路a上除了设有开关电源8以外，还连接有供电电压监测单元6和均衡控制单元7。所述供电电压监测单元6，用于对均衡板供电电压监测，当出现供电过压情况时，能够向均衡控制单元7输出使能。所述均衡控制单元7，能够控制均衡板的原边线路c和副边线路d通断和电流方向。具体来说，所述的均衡板的原边线路c上设有原边MOS管2，均衡板的副边线路 d上设有副边MOS管3和均衡电流采集功能模块9。所述均衡选通电路b上设有电压采集模块10，电压采集模块10用于采集同一并联支路上的单体电池4电压，并将其反馈给均衡控制单元7。在进一步地优选方案中，每组的均衡选通电路b可包括多条并联支路，每条并联支路上均设有单体电池4和选通MOS管5。均衡控制单元7控制原边MOS管2和副边MOS管3的开关频率，上述方案中的供电电源和单体电池4都是直流电压，此主动均衡设计是通过变压器1进行电量转移交换，原边MOS管2和副边MOS管3主要有两个功能，第一：把直流电转变为交流电，提供磁场转换变化进行电量转移。第二：通过控制原边MOS 管2和副边MOS管3开关频率不同，进行单体电池4均衡充电、放电方向控制，可实现均衡安全自动切换和关断。所述均衡控制单元7控制选通MOS管5，从而控制每条并联支路的通断，即可相应的选择性均衡某一节。In addition to the switching power supply 8 , the DC switching power supply circuit a is also connected with a power supply voltage monitoring unit 6 and an equalization control unit 7 . The power supply voltage monitoring unit 6 is used for monitoring the power supply voltage of the balance board, and can output enable to the balance control unit 7 when the power supply overvoltage occurs. The balance control unit 7 can control the on-off and current direction of the primary line c and the secondary line d of the equalization board. Specifically, the primary side circuit c of the equalization board is provided with a primary side MOS transistor 2 , and the secondary side circuit d of the equalization board is provided with a secondary side MOS transistor 3 and a balanced current collection function module 9 . The balanced gating circuit b is provided with a voltage acquisition module 10 for collecting the voltage of the single battery 4 on the same parallel branch and feeding it back to the equalization control unit 7 . In a further preferred solution, the balanced gating circuit b of each group may include a plurality of parallel branches, and each parallel branch is provided with a single battery 4 and a gating MOS transistor 5 . The balance control unit 7 controls the switching frequency of the primary side MOS tube 2 and the secondary side MOS tube 3. The power supply and the single battery 4 in the above scheme are both DC voltages. This active equalization design uses the transformer 1 for power transfer and exchange. The original The side MOS tube 2 and the secondary side MOS tube 3 mainly have two functions, first: convert direct current into alternating current, and provide magnetic field conversion for power transfer. Second: By controlling the switching frequency of the primary side MOS tube 2 and the secondary side MOS tube 3 to be different, the balanced charge and discharge direction control of the single battery 4 can be carried out, so that balanced and safe automatic switching and shutdown can be realized. The equalization control unit 7 controls the gate MOS transistor 5, thereby controlling the on-off of each parallel branch, so as to selectively equalize a certain branch accordingly.
实际运用中，每个均衡板一般可连接六节单体电池4。所述均衡电流采集功能模块9对于主动均衡电流实时采集；并在过流时，向均衡控制单元7输出使能；均衡控制单元7能够快速切断均衡电路，实现过流保护。所述的电压采集模块10用于采集同一并联支路上的单体电池4电压，并将其反馈给均衡控制单元7。进一步地，上述均衡控制单元7的硬件构成均衡回路构建、电量监测反馈。对电量计算判断、下发出充放电均衡控制策略，具体是采集单体电池4电压值、根据记录SOC芯片和单体电池4充放电记录进行计算维持能量平衡；且均衡控制单元7所构建的均衡回路中，处于放电状态的单体电池的均衡电流总量需小于或等于处于充电状态的单体电池的均衡电流总量。In practice, each balance board can generally be connected to six single cells 4 . The equalization current acquisition function module 9 collects the active equalization current in real time; and outputs enable to the equalization control unit 7 when the current is overcurrent; the equalization control unit 7 can quickly cut off the equalization circuit to realize overcurrent protection. The voltage collection module 10 is used to collect the voltage of the single battery 4 on the same parallel branch, and feed it back to the balance control unit 7 . Further, the hardware of the balance control unit 7 constitutes balance circuit construction and power monitoring feedback. Calculating and judging the electric quantity, issuing a charge-discharge balance control strategy, specifically collecting the voltage value of the single battery 4, and calculating and maintaining the energy balance according to the recorded SOC chip and the charge-discharge records of the single battery 4; and the balance control unit 7 constructs In the loop, the total balance current of the single battery in the discharge state must be less than or equal to the total balance current of the single battery in the charge state.
以下为均衡控制单元7构建均衡回路的步骤：The steps for constructing the equalization loop for the equalization control unit 7 are as follows:
1.当使用开关电源8供电情况下，出现需要均衡放电状态的单体电池4的均衡电流总量大于处于需要均衡充电状态的单体电池4的均衡电流总量时，会触发模块开关电源出现过压现象。1. When the switching power supply 8 is used for power supply, when the total amount of balanced current of the single battery 4 in the state of balanced discharge is greater than the total amount of balanced current of the single battery 4 in the state of balanced charging, it will trigger the switching power supply of the module to appear Overvoltage phenomenon.
2.供电电压监测单元6对于均衡板供电电压监测，可触发供电电压监测单元6 输出过压使能。2. The power supply voltage monitoring unit 6 can trigger the power supply voltage monitoring unit 6 to output an overvoltage enable for monitoring the power supply voltage of the balance board.
3.均衡控制单元7收到供电电压监测单元6的过压触发信号，同时接收电压采集模块10采集上传的最新单体电池4电压情况，进行判断。3. The balance control unit 7 receives the overvoltage trigger signal from the power supply voltage monitoring unit 6, and at the same time receives the voltage acquisition module 10 to collect and upload the latest voltage of the single battery 4 for judgment.
4.根据判断结构，均衡控制单元7通过切换原边MOS管2、副边MOS管3和选通MOS管5的工作状态，转变单体充放电方向；从而使供电电压降低，保护均衡模块、开关电源模块(电动汽车上改开关电源为车载DC/DC模块)。4. According to the judging structure, the balance control unit 7 changes the charging and discharging direction of the monomer by switching the working states of the primary side MOS tube 2, the secondary side MOS tube 3 and the gate MOS tube 5; thereby reducing the power supply voltage and protecting the equalization module, Switching power supply module (switching power supply for electric vehicles is changed to vehicle DC/DC module).
基于上述实施方式，在结合说明书附图所示(以两个均衡板为例，且每个均衡板上均连接一节单体电池4)，对于本方案进行工作状态的说明。Based on the above-mentioned implementation, in combination with the drawings shown in the specification (taking two equalization boards as an example, and each equalization board is connected to a single battery 4), the working state of this solution will be described.
①当进行两节单体电池4均衡充电时，供电电压监测单元6不触发，开关电源向内输入均衡电流，正常工作。① When equalizing charging of two single cells 4 is performed, the power supply voltage monitoring unit 6 is not triggered, and the switching power supply inputs an equalizing current inward and works normally.
②当进行一节单体电池4均衡充电、一节单体电池4均衡放电时，供电电压监测单元6不触发，开关电源向内输入模块工作电流，正常工作。② When a single cell 4 is balancedly charged and a single cell 4 is balancedly discharged, the power supply voltage monitoring unit 6 is not triggered, and the switching power supply inputs the working current of the module to work normally.
③当进行两节单体电池4均衡放电时，首先均衡板供电电压被瞬间抬高，供电电压监测单元6被触发工作，输出使能信号，均衡板控制芯片供电使能被切换关断，包括PWM波输出芯片、副边恒流源调节电路、选通开关切换电路被保护关断，使供电电压被拉低，维护模块正常工作。同时可通过软件控制，调节均衡板充放电方向，由原来两节单体电池4均衡放电，更改为一节电池均衡充电、一节电池均衡放电，达到能量转移平衡。③ When carrying out balanced discharge of two single cells 4, first the power supply voltage of the balance board is raised instantaneously, the power supply voltage monitoring unit 6 is triggered to work, and an enable signal is output, and the power supply enable of the balance board control chip is switched off, including The PWM wave output chip, the secondary side constant current source adjustment circuit, and the strobe switch switching circuit are protected and shut down, so that the power supply voltage is pulled down, and the maintenance module works normally. At the same time, the charging and discharging direction of the balancing board can be adjusted through software control, changing from the original balanced discharging of two single cells 4 to balanced charging of one battery and balanced discharging of one battery to achieve energy transfer balance.
上述步骤按照先监测，后控制，再调节的逻辑执行。The above steps are executed according to the logic of monitoring first, then controlling, and then adjusting.
上述技术方案涉及一种可使用开关电源供电的双向主动均衡管理系统，该可使用开关电源供电的双向主动均衡管理系统中的供电电压监测单元6用于对均衡板供电电压监测，均衡控制单元7则可用于控制切换单个均衡板充放电方向和控制选通MOS管开启与关闭。因此采用该可使用开关电源供电的双向主动均衡管理系统即可根据预设条件和监测反馈条件，系统自动控制均衡板充放电方向以及接入的单体电池4(锂电池)数量，从而可避免均衡过程中多余能量输入开关电源，可避免开关电源和可使用开关电源供电的双向主动均衡管理系统内模块被保护或烧坏的问题，使系统正常工作。The above technical solution relates to a two-way active equalization management system that can be powered by a switching power supply. The power supply voltage monitoring unit 6 in the two-way active equalization management system that can be powered by a switching power supply is used to monitor the power supply voltage of the equalization board, and the equalization control unit 7 It can be used to control and switch the charge and discharge direction of a single equalization board and to control the opening and closing of the strobe MOS tube. Therefore, the two-way active equalization management system that can be powered by a switching power supply can automatically control the charging and discharging direction of the equalization board and the number of connected single batteries 4 (lithium batteries) according to preset conditions and monitoring feedback conditions, thereby avoiding During the equalization process, the excess energy is input into the switching power supply, which can avoid the problem that the modules in the switching power supply and the two-way active equalization management system that can be powered by the switching power supply are protected or burned out, so that the system can work normally.
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，根据本发明的技术方案及其发明构思加以等同替换或改变，都应涵盖在本发明的保护范围之内。The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.
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