WO2020155821A1 - Swappable battery-based dc-dc power supply grid-connecting method and system - Google Patents

Swappable battery-based dc-dc power supply grid-connecting method and system Download PDF

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Publication number
WO2020155821A1
WO2020155821A1 PCT/CN2019/121366 CN2019121366W WO2020155821A1 WO 2020155821 A1 WO2020155821 A1 WO 2020155821A1 CN 2019121366 W CN2019121366 W CN 2019121366W WO 2020155821 A1 WO2020155821 A1 WO 2020155821A1
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battery pack
load
battery
module
power
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PCT/CN2019/121366
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French (fr)
Chinese (zh)
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周泉
贾志远
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飞依诺科技(苏州)有限公司
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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
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • 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

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  • the invention belongs to the field of medical ultrasonic diagnostic imaging, and in particular relates to a DCDC power supply grid-connected method and system based on a pluggable battery.
  • multiple battery packs can output power at the same time by means of DCDC grid connection, thereby satisfying the situation that a single battery pack cannot meet the power supply requirement.
  • the specific method is: using multiple battery packs to supply power at the same time; Specifically, the same DCDC current sharing scheme, such as democratic current sharing, master-slave current sharing, enables each battery pack to evenly provide current to the load.
  • the battery pack status is not fixed. Take a dual battery power supply system as an example. For the connected load, one battery pack has a remaining capacity of 20%, and the other battery pack has a remaining capacity. 90%. According to the existing technology, the current sharing scheme is adopted to supply power to the load. Thus, when the remaining capacity of the battery pack is 20%, the battery pack with 90% of the remaining capacity has 70% of the remaining capacity, because a battery pack cannot be alone Provide enough energy. At this time, the system cannot work normally due to insufficient power supply. At the same time, 70% of the capacity of a single battery pack cannot be released, and the utilization rate of the battery pack is low.
  • the purpose of the present invention is to provide a DCDC power supply grid-connected method and system based on a pluggable battery.
  • an embodiment of the present invention provides a DCDC power supply grid-connected method based on a pluggable battery, the method includes: S1, obtaining the remaining capacity of each battery pack connected to the same load; wherein , At least two of the battery packs connected to the same load supply power to the connected load at the same time;
  • the output power of each battery pack is proportioned in the order of priority from high to low, wherein the higher the priority of the battery pack, the higher the output power of the battery pack accounts for the power required by the load The greater the power ratio;
  • the step S2 further includes: monitoring the temperature of each battery pack in real time, and if the temperature of the battery pack is greater than the system preset temperature threshold, directly adjust its corresponding priority level to the lowest until the battery pack temperature When the pack temperature is not greater than the system preset temperature threshold, the priority level of the battery pack is adjusted according to the remaining capacity of the battery pack.
  • the step S3 specifically includes: adjusting the priority maximum power output of the battery pack with a higher priority level.
  • each battery pack is configured to connect to the load through an independent CC-CV module
  • the step S4 specifically includes:
  • the driving voltage loop works normally, the current loop stops working, and the corresponding output power is the preset voltage value * actual output current value;
  • the driving voltage loop stops working, the current loop works normally, and the corresponding output power is the actual output voltage value * the preset current value.
  • step S2 further includes:
  • the step S2 specifically includes:
  • the step of adjusting the preset voltage value of the battery packs adjacent to the priority level is IMAX*RE, where the IMAX represents the preset current value, and the RE represents the internal resistance of the CC-CV module.
  • an embodiment of the present invention provides a DCDC power grid-connected system based on a pluggable battery.
  • the system includes: an acquisition module for acquiring the remaining battery packs connected to the same load Capacity; wherein at least two of the battery packs connected to the same load supply power to the connected load at the same time;
  • the level matching module is configured to obtain the power supply priority level of each battery pack corresponding to the load according to the remaining capacity of each battery pack; wherein, the greater the remaining capacity of the battery pack, the higher the corresponding priority level;
  • the adjustment module is used to match the output power of each battery pack in the order of priority from high to low according to the demand of the load.
  • the output module is used to send instructions to output power according to the ratio.
  • the level matching module is also used to: monitor the temperature of each battery pack in real time, and if the temperature of the battery pack is greater than the system preset temperature threshold, directly adjust its corresponding priority level to the lowest. Until the temperature of the battery pack is not greater than the system preset temperature threshold, the priority level of the battery pack is adjusted according to the remaining capacity of the battery pack.
  • the adjustment module is specifically configured to adjust the maximum power output of the battery pack with a higher priority level.
  • system further includes: a configuration module configured to configure each battery pack to connect to the load through an independent CC-CV module;
  • the output module is also used to monitor in real time whether the actual output current value corresponding to the current feedback loop of each CC-CV module is less than the preset current value
  • the driving voltage loop stops working, the current loop works normally, and the corresponding output power is the actual output voltage value * the preset current value.
  • the level matching module is also used to adjust the preset voltage value of each battery pack input to the load through the CC-CV module, and make each battery pack in the order of priority from high to low.
  • the preset voltage values corresponding to the battery packs are arranged in descending order.
  • the level matching module is specifically used for:
  • the step of adjusting the preset voltage value of the battery packs adjacent to the priority level is IMAX*RE, where the IMAX represents the preset current value, and the RE represents the internal resistance of the CC-CV module.
  • the beneficial effect of the present invention is that the DCDC power supply grid-connected method and system of the pluggable battery of the present invention configure its power supply priority level according to the capacity of each battery pack, which can greatly improve the pluggable battery Utilization of battery power in the power supply system of
  • FIG. 1 is a schematic flowchart of a DCDC power grid connection method based on a pluggable battery in an embodiment of the present invention
  • Figure 2 is a schematic diagram of a specific example hardware structure of the present invention.
  • Fig. 3 is a schematic diagram of the working principle of the CC-CV module in a specific example of the present invention.
  • FIG. 4 is a schematic diagram of the corresponding circuit structure of each priority level in a specific example of the present invention.
  • FIG. 5 is a schematic diagram of modules of a DCDC power grid-connected system based on a pluggable battery in an embodiment of the present invention.
  • a DCDC power supply grid-connected method based on a pluggable battery includes: S1, obtaining the remaining capacity of each battery pack connected to the same load; where At least two of the battery packs of the same load simultaneously supply power to the connected load.
  • the DCDC grid-connected method is adopted to make multiple battery packs output power at the same time to meet the load demand; among them, in the specific embodiment of the present invention, there are multiple battery packs connected to the load at the same time, but the The number of battery packs that the load supplies power needs to be adjusted in real time according to load needs, and there are at least two battery packs that supply power to the load at the same time.
  • the MCU can read the capacity of each battery through SMBUS. It may be that the MCU reads the voltage of the battery through the ADC to obtain the capacity of the battery indirectly, which will not be described further here.
  • the number of battery packs connected to the load is 3, where at a certain monitoring moment, the information obtained is: the remaining capacity of battery pack 1 is 80%, and the battery pack 2 The remaining capacity is 60%, and the remaining capacity of battery pack 3 is 40%.
  • set battery pack 1 to level 1 and its priority is the highest
  • battery pack 2 is set to level 2
  • its priority is in the middle
  • battery pack 3 Set to level 3 which has the lowest priority.
  • the step S2 further includes: monitoring the temperature of each battery pack in real time, and if the temperature of the battery pack is greater than the system preset temperature threshold, directly adjust its corresponding priority level to the lowest until the battery pack When the temperature is not greater than the system preset temperature threshold, the priority level of the battery pack is adjusted according to the remaining capacity of the battery pack.
  • the preset temperature threshold is a temperature constant, and its size can be specifically set according to needs. Normally, the preset temperature threshold is related to the performance of the battery pack. When the temperature of the battery pack exceeds the preset temperature threshold, it means If the temperature of the heat sink is too high, it may malfunction. Therefore, adjust its priority to the lowest level to avoid using it as a power supply for the load as much as possible.
  • the output power of each battery pack is proportioned in the order of priority from high to low, wherein the higher the priority of the battery pack, the higher the output power of the battery pack accounts for the power required by the load The greater the power ratio;
  • the output power of each battery pack can be matched in a descending sequence according to the priority level from high to low.
  • the output power of each battery pack can be matched in an arithmetic decreasing sequence in the order of priority from high to low, and no further details will be given here.
  • the step S3 specifically includes: adjusting the battery pack with a higher priority to give priority to the maximum power output. Also take the above example as an illustration, assuming that the power required by the load is 80 watts, the maximum output power of each battery pack can reach 60 watts; according to the above configuration rules, configure the output power of battery pack 1, battery pack 2, and battery pack 3.
  • the load power is increased to 130 watts.
  • the battery pack 1 and battery pack 2 are all output at full power with the maximum output power, and the battery pack 3 assists in compensation, that is: adjusting the battery pack 1 and battery pack 2
  • the output power is respectively 60 watts, and the output power of the battery pack 3 is adjusted to 10 watts, which will not be further explained here.
  • step S3 send instructions to each battery pack to make it output power to the load according to the above-mentioned ratio.
  • each battery pack is configured to connect to the load through an independent CC-CV module.
  • the CC-CV module refers to when the actual output current is less than the set value of the current loop, the voltage loop controls the DCDC output voltage to stabilize the value of the output voltage. It refers to when the actual output current is greater than or equal to the set value of the current loop At that time, the output voltage of DCDC begins to change to maintain the stability of the output current.
  • the step S4 specifically includes: real-time monitoring of whether the actual output current value corresponding to the current feedback loop of each CC-CV module is less than the preset current value, if so, the driving voltage loop works normally, and the current The loop stops working, and the corresponding output power is the preset voltage value * actual output current value; if not, the drive voltage loop stops working, the current loop works normally, and the corresponding output power is the actual output voltage value * preset Current value.
  • a CC-CV module connected to one of the battery packs is taken as an example for specific introduction.
  • VBAT represents the power supply voltage of the battery pack
  • RL represents the load
  • VOUT represents the actual CC-CV module.
  • Grid-connected CC-CV module refers to the direct parallel connection of the outputs of two CC-CV modules. For an ideal voltage source, it cannot be directly connected in parallel, but for the CC-CV module, it is feasible to set the feedback parameters reasonably. When multiple CC-CV modules are connected in parallel, the output voltage is determined by the CC-CV module with the highest setting.
  • the step S2 further includes: adjusting the preset voltage value of each battery pack input to the load through the CC-CV module to the priority level From high to low, the preset voltage values corresponding to each battery pack are arranged in descending order.
  • the step of adjusting the preset voltage value of the battery packs adjacent to the priority level is IMAX*RE, where the IMAX represents the preset current value, and the RE represents the internal value of the CC-CV module. Hinder.
  • each CC-CV module can be regarded as a DC power supply with no-load output voltage of VSET and internal resistance of RE.
  • the output power of each CC-CV module is mainly provided by the CC-CV module with a high set voltage; in the specific embodiment of the present invention, it is ensured that the output voltage is set high
  • the load current of the CC-CV module is equal to IMAX
  • the voltage is still greater than the output voltage set by the CC-CV module with the second priority output, which can ensure the realization of regulation, that is, the adjustment step is IMAX*RE.
  • the MCU determines the discharge priority level of the CC-CV module corresponding to each battery pack according to the battery pack information.
  • the MCU regulates the CCs that are arranged in the order of priority from highest to lowest.
  • the output voltages of -CV module are:
  • an embodiment of the present invention provides a DCDC power grid-connected system based on a pluggable battery including: an acquisition module 100, a level matching module 200, an adjustment module 300, an output module 400, and a configuration module 500.
  • the obtaining module 100 is configured to obtain the remaining capacity of each battery pack connected to the same load; wherein at least two battery packs of the battery packs connected to the same load supply power to the connected load at the same time.
  • the level matching module 200 is configured to obtain the power supply priority level of each battery pack corresponding to the load according to the remaining capacity of each battery pack; wherein, the greater the remaining capacity of the battery pack, the higher the corresponding priority level.
  • the level matching module 200 is also used to: monitor the temperature of each battery pack in real time, and if the temperature of the battery pack is greater than the system preset temperature threshold, directly adjust its corresponding priority level to the lowest until the battery pack temperature When the pack temperature is not greater than the system preset temperature threshold, the priority level of the battery pack is adjusted according to the remaining capacity of the battery pack.
  • the adjustment module 300 is used for matching the output power of each battery pack in the order of priority from high to low according to the requirements of the load. The higher the priority of the battery pack, the higher the output power of the battery pack. The greater the ratio of the required power supply.
  • the adjustment module 300 is used to match the output power of each battery pack in a descending sequence according to the priority level.
  • the adjustment module 300 is used for The output power of each battery pack is matched in an arithmetic decreasing sequence in the order of priority from high to low, and no further details are given here.
  • the adjustment module 300 is used to adjust the maximum power output of the battery pack with a higher priority.
  • the output module 400 is used to send instructions to each battery pack to make it output power to the load according to the above-mentioned ratio.
  • the configuration module 500 configures each battery pack to connect to the load through an independent CC-CV module.
  • the CC-CV module refers to when the actual output current is less than the set value of the current loop, the voltage loop controls the DCDC output voltage to stabilize the value of the output voltage. It refers to when the actual output current is greater than or equal to the set value of the current loop At that time, the output voltage of DCDC begins to change to maintain the stability of the output current.
  • the output module 400 is specifically used to monitor in real time whether the actual output current value corresponding to the current feedback loop of each CC-CV module is less than the preset current value. If so, the drive voltage loop works normally, and the current loop The circuit stops working, and the corresponding output power is the preset voltage value * actual output current value; if not, the drive voltage loop stops working, the current loop works normally, and the corresponding output power is the actual output voltage value * preset current value.
  • a CC-CV module connected to one of the battery packs is taken as an example for specific introduction.
  • VBAT represents the power supply voltage of the battery pack
  • RL represents the load
  • VOUT represents the actual CC-CV module.
  • Grid-connected CC-CV module refers to the direct parallel connection of the outputs of two CC-CV modules. For an ideal voltage source, it cannot be directly connected in parallel, but for the CC-CV module, it is feasible to set the feedback parameters reasonably. When multiple CC-CV modules are connected in parallel, the output voltage is determined by the CC-CV module with the highest setting.
  • the level matching module 200 is also used to adjust the preset voltage value of each battery pack input to the load through the CC-CV module to The order of priority from high to low causes the preset voltage value corresponding to each battery pack to be arranged in descending order.
  • the step by which the level matching module 200 adjusts the preset voltage value of the battery packs adjacent to the priority level is IMAX*RE, where the IMAX represents the preset current value, and the RE represents The internal resistance of the CC-CV module.
  • each CC-CV module can be regarded as a DC power supply with no-load output voltage of VSET and internal resistance of RE.
  • the output power of each CC-CV module is mainly provided by the CC-CV module with a high set voltage; in the specific embodiment of the present invention, it is ensured that the output voltage is set high
  • the load current of the CC-CV module is equal to IMAX
  • the voltage is still greater than the output voltage set by the CC-CV module with the second priority output, which can ensure the realization of regulation, that is, the adjustment step is IMAX*RE.
  • the MCU determines the discharge priority level of the CC-CV module corresponding to each battery pack according to the battery pack information.
  • the MCU regulates the CCs that are arranged in the order of priority from highest to lowest.
  • the output voltages of -CV module are:
  • the DCDC power grid-connected method and system based on pluggable batteries of the present invention configures its power supply priority level according to the capacity of each battery pack, so that battery packs with high capacity preferentially provide load current, thereby improving pluggability
  • the device implementations described above are merely illustrative.
  • the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, that is, they may be located in One place, or it can be distributed to multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the objectives of the solutions of this embodiment. Those of ordinary skill in the art can understand and implement it without creative work.

Abstract

Provided in the present invention are a swappable battery-based DC-DC power supply grid-connecting method and system. The method comprises: S1, acquiring the remaining capacity of each battery pack connected to a same load, where at least two battery packs in the battery packs connected to a same load concurrently supply power to the connected load; S2, acquiring a power supply priority level of each battery pack corresponding to the load on the basis of the remaining capacity of each battery pack, where the greater the remaining capacity of a battery pack, the higher the corresponding priority level thereof; S3, according to a demand of the load, proportioning the output power of each battery pack in a descending order of priority level, where the higher the priority level of a battery pack, the greater the proportion that the output power thereof accounts in the power of the electricity required by the load; and S4, transmitting an instruction to output power according to the proportions. The present invention configures the power supply priority level of each battery pack on the basis of the capacity thereof, thus greatly increasing the utilization rate of battery power in a swappable battery power supply system.

Description

基于可插拔电池的DCDC电源并网方法及系统DCDC power supply grid-connected method and system based on pluggable battery 技术领域Technical field
本发明属于医用超声诊断成像领域，尤其涉及一种基于可插拔电池的DCDC电源并网方法及系统。The invention belongs to the field of medical ultrasonic diagnostic imaging, and in particular relates to a DCDC power supply grid-connected method and system based on a pluggable battery.
背景技术Background technique
随着电池技术的发展，极大的促进了超声医学诊断技术的革新，尤其是便携式彩超的普及以及电网掉电时给小型彩超设备续电的功能。电网掉电时通过电池包在DC侧给小型彩超设备供电相比传统的UPS技术，其优势非常明显；该供电方案提供的供电源体积更小，电池包的利用率更高，可靠性更好，应用场景更灵活；但是对于单个的电池包的供电功率是一定的，其体现在如果工作功率超过电池包本身的设定值，电池包会进入过流或者过温保护模式，停止输出。由于不同的彩超设备功耗不同，如果针对不同功耗的机型定制不同供电功率的电池包，则导致研发周期变长，进一步的，还需要各种安规认证和测试，如此也会导致研发的成本提高，以及提高企业内部管控和维护的成本。With the development of battery technology, the innovation of ultrasonic medical diagnosis technology has been greatly promoted, especially the popularization of portable color Doppler ultrasound and the function of recharging small color Doppler ultrasound equipment when the power grid is off. When the power grid is powered off, the small color Doppler ultrasound device is powered on the DC side through the battery pack. Compared with the traditional UPS technology, its advantages are very obvious; the power supply provided by this power supply scheme is smaller, the battery pack utilization rate is higher, and the reliability is better. , The application scenario is more flexible; but the power supply of a single battery pack is certain, which is reflected in that if the working power exceeds the set value of the battery pack itself, the battery pack will enter the over-current or over-temperature protection mode and stop output. Due to the different power consumption of different color Doppler ultrasound equipment, if you customize battery packs with different power supply power for different power consumption models, the development cycle will become longer. Further, various safety certifications and tests are required, which will also lead to research and development. Increasing the cost of internal control and maintenance of the enterprise.
现有技术中，为了解决上述问题，通过DCDC并网的方式，使多个电池包同时输出功率，进而满足单个电池包不能满足供电的情况，其具体做法为：采用多个电池包同时供电；具体的，同过DCDC均流的方案，例如：民主均流，主从均流，使得各个电池包均匀的向负载提供电流。In the prior art, in order to solve the above-mentioned problems, multiple battery packs can output power at the same time by means of DCDC grid connection, thereby satisfying the situation that a single battery pack cannot meet the power supply requirement. The specific method is: using multiple battery packs to supply power at the same time; Specifically, the same DCDC current sharing scheme, such as democratic current sharing, master-slave current sharing, enables each battery pack to evenly provide current to the load.
然而，对于可插拔电池包系统而言，电池包的状态是不固定的，以双电池供电系统为例，对于接入的负载，其中一个电池包容量剩余20％，另外一个电池包容量剩余90％。按照现有技术采用均流方案对负载进行供电，如此，当剩余容量为20％电池包的容量用完时，剩余容量90％的电池包还有70％的容量剩余，由于一个电池包不能单独提供足够的能量，此时，系统由于供电不足而不能正常工作，同时，单个电池包70％的容量也不能释放，电池包的利用率较低。However, for a pluggable battery pack system, the battery pack status is not fixed. Take a dual battery power supply system as an example. For the connected load, one battery pack has a remaining capacity of 20%, and the other battery pack has a remaining capacity. 90%. According to the existing technology, the current sharing scheme is adopted to supply power to the load. Thus, when the remaining capacity of the battery pack is 20%, the battery pack with 90% of the remaining capacity has 70% of the remaining capacity, because a battery pack cannot be alone Provide enough energy. At this time, the system cannot work normally due to insufficient power supply. At the same time, 70% of the capacity of a single battery pack cannot be released, and the utilization rate of the battery pack is low.
发明内容Summary of the invention
为解决上述技术问题，本发明的目的在于提供一种基于可插拔电池的DCDC电源并网方法及系统。In order to solve the above technical problems, the purpose of the present invention is to provide a DCDC power supply grid-connected method and system based on a pluggable battery.
为了实现上述发明目的之一，本发明一实施方式提供一种基于可插拔电池的DCDC电源并网方法，所述方法包括：S1、获取接入同一负载的每个电池包的剩余容量；其中，接入同一负载的电池包中至少两个电池包同时期为接入的所述负载供电；In order to achieve one of the above-mentioned objects of the invention, an embodiment of the present invention provides a DCDC power supply grid-connected method based on a pluggable battery, the method includes: S1, obtaining the remaining capacity of each battery pack connected to the same load; wherein , At least two of the battery packs connected to the same load supply power to the connected load at the same time;
S2、根据每个电池包的剩余容量获取每个电池包对应于所述负载的供电优先级别；其中，所述电池包的剩余容量越大，其对应的优先级别越高；S2. Obtain the power supply priority level of each battery pack corresponding to the load according to the remaining capacity of each battery pack; wherein, the greater the remaining capacity of the battery pack, the higher the corresponding priority level;
S3、依照所述负载的需求，以优先级别自高到低的顺序对每个电池包的输出功率进行配比，其中，所述电池包的优先级别越高，其输出功率占负载所需供电功率的配比越大；S3. According to the requirements of the load, the output power of each battery pack is proportioned in the order of priority from high to low, wherein the higher the priority of the battery pack, the higher the output power of the battery pack accounts for the power required by the load The greater the power ratio;
S4、发送指令以按照配比输出功率。S4. Send instructions to output power according to the ratio.
作为本发明一实施方式的进一步改进，所述步骤S2还包括：实时监测各个电池包的温度，若电池包温度大于系统预设温度阈值，则直接将其对应的优先级别调节为最低，直至电池包温度不大于系统预设温度阈值时，再根据所述电池包的剩余容量调整其优先级别。As a further improvement of an embodiment of the present invention, the step S2 further includes: monitoring the temperature of each battery pack in real time, and if the temperature of the battery pack is greater than the system preset temperature threshold, directly adjust its corresponding priority level to the lowest until the battery pack temperature When the pack temperature is not greater than the system preset temperature threshold, the priority level of the battery pack is adjusted according to the remaining capacity of the battery pack.
作为本发明一实施方式的进一步改进，所述步骤S3具体包括：调整优先级别高的电池包优先最大功率输出。As a further improvement of an embodiment of the present invention, the step S3 specifically includes: adjusting the priority maximum power output of the battery pack with a higher priority level.
作为本发明一实施方式的进一步改进，配置每个电池包通过独立的CC-CV模块接入负载；As a further improvement of an embodiment of the present invention, each battery pack is configured to connect to the load through an independent CC-CV module;
所述步骤S4具体包括：The step S4 specifically includes:
实时监测每一CC-CV模块的电流反馈环路对应的实际输出电流值是否小于预设电流值，Real-time monitoring of whether the actual output current value corresponding to the current feedback loop of each CC-CV module is less than the preset current value,
若是，驱动电压环路正常工作，电流环路停止工作，且对应的输出功率为 预设电压值*实际输出电流值；If yes, the driving voltage loop works normally, the current loop stops working, and the corresponding output power is the preset voltage value * actual output current value;
若否，驱动电压环路停止工作，电流环路正常工作，且对应的输出功率为实际输出电压值*预设电流值。If not, the driving voltage loop stops working, the current loop works normally, and the corresponding output power is the actual output voltage value * the preset current value.
作为本发明一实施方式的进一步改进，所述步骤S2还包括：As a further improvement of an embodiment of the present invention, the step S2 further includes:
调整每个电池包通过CC-CV模块输入至负载的预设电压值，以优先级别自高到低的顺序使每个电池包对应的预设电压值按降序排列。Adjust the preset voltage value of each battery pack input to the load through the CC-CV module, and arrange the preset voltage value corresponding to each battery pack in descending order in order of priority from high to low.
作为本发明一实施方式的进一步改进，所述步骤S2具体包括：As a further improvement of an embodiment of the present invention, the step S2 specifically includes:
调整优先级别相邻的电池包的预设电压值的步进为IMAX*RE，其中，所述IMAX表示预设电流值，所述RE表示CC-CV模块的内阻。The step of adjusting the preset voltage value of the battery packs adjacent to the priority level is IMAX*RE, where the IMAX represents the preset current value, and the RE represents the internal resistance of the CC-CV module.
为了解决上述发明目的另一，本发明一实施方式提供一种基于可插拔电池的DCDC电源并网系统，所述系统包括：获取模块，用于取接入同一负载的每个电池包的剩余容量；其中，接入同一负载的电池包中至少两个电池包同时期为接入的所述负载供电；In order to solve the other objective of the above invention, an embodiment of the present invention provides a DCDC power grid-connected system based on a pluggable battery. The system includes: an acquisition module for acquiring the remaining battery packs connected to the same load Capacity; wherein at least two of the battery packs connected to the same load supply power to the connected load at the same time;
级别匹配模块，用于根据每个电池包的剩余容量获取每个电池包对应于所述负载的供电优先级别；其中，所述电池包的剩余容量越大，其对应的优先级别越高；The level matching module is configured to obtain the power supply priority level of each battery pack corresponding to the load according to the remaining capacity of each battery pack; wherein, the greater the remaining capacity of the battery pack, the higher the corresponding priority level;
调整模块，用于依照所述负载的需求，以优先级别自高到低的顺序对每个电池包的输出功率进行配比，其中，所述电池包的优先级别越高，其输出功率占负载所需供电功率的配比越大；The adjustment module is used to match the output power of each battery pack in the order of priority from high to low according to the demand of the load. The higher the priority of the battery pack, the higher the output power of the load. The greater the ratio of the required power supply;
输出模块，用于发送指令以按照配比输出功率。The output module is used to send instructions to output power according to the ratio.
作为本发明一实施方式的进一步改进，所述级别匹配模块还用于：实时监测各个电池包的温度，若电池包温度大于系统预设温度阈值，则直接将其对应的优先级别调节为最低，直至电池包温度不大于系统预设温度阈值时，再根据所述电池包的剩余容量调整其优先级别。As a further improvement of an embodiment of the present invention, the level matching module is also used to: monitor the temperature of each battery pack in real time, and if the temperature of the battery pack is greater than the system preset temperature threshold, directly adjust its corresponding priority level to the lowest. Until the temperature of the battery pack is not greater than the system preset temperature threshold, the priority level of the battery pack is adjusted according to the remaining capacity of the battery pack.
作为本发明一实施方式的进一步改进，调整模块具体用于：调整优先级别高的电池包优先最大功率输出。As a further improvement of an embodiment of the present invention, the adjustment module is specifically configured to adjust the maximum power output of the battery pack with a higher priority level.
作为本发明一实施方式的进一步改进，所述系统还包括：配置模块，用于配置每个电池包通过独立的CC-CV模块接入负载；As a further improvement of an embodiment of the present invention, the system further includes: a configuration module configured to configure each battery pack to connect to the load through an independent CC-CV module;
所述输出模块还用于：实时监测每一CC-CV模块的电流反馈环路对应的实际输出电流值是否小于预设电流值，The output module is also used to monitor in real time whether the actual output current value corresponding to the current feedback loop of each CC-CV module is less than the preset current value,
若是，驱动电压环路正常工作，电流环路停止工作，且对应的输出功率为预设电压值*实际输出电流值；If yes, the drive voltage loop works normally, the current loop stops working, and the corresponding output power is the preset voltage value * actual output current value;
若否，驱动电压环路停止工作，电流环路正常工作，且对应的输出功率为实际输出电压值*预设电流值。If not, the driving voltage loop stops working, the current loop works normally, and the corresponding output power is the actual output voltage value * the preset current value.
作为本发明一实施方式的进一步改进，所述级别匹配模块还用于：调整每个电池包通过CC-CV模块输入至负载的预设电压值，以优先级别自高到低的顺序使每个电池包对应的预设电压值按降序排列。As a further improvement of an embodiment of the present invention, the level matching module is also used to adjust the preset voltage value of each battery pack input to the load through the CC-CV module, and make each battery pack in the order of priority from high to low. The preset voltage values corresponding to the battery packs are arranged in descending order.
作为本发明一实施方式的进一步改进，所述级别匹配模块具体用于：As a further improvement of an embodiment of the present invention, the level matching module is specifically used for:
调整优先级别相邻的电池包的预设电压值的步进为IMAX*RE，其中，所述IMAX表示预设电流值，所述RE表示CC-CV模块的内阻。The step of adjusting the preset voltage value of the battery packs adjacent to the priority level is IMAX*RE, where the IMAX represents the preset current value, and the RE represents the internal resistance of the CC-CV module.
与现有技术相比，本发明的有益效果是：本发明的可插拔电池的DCDC电源并网方法及系统，根据各个电池包的容量配置其供电优先级别，可以极大地提高可插拔电池的供电系统中电池电量的利用率。Compared with the prior art, the beneficial effect of the present invention is that the DCDC power supply grid-connected method and system of the pluggable battery of the present invention configure its power supply priority level according to the capacity of each battery pack, which can greatly improve the pluggable battery Utilization of battery power in the power supply system of
附图说明Description of the drawings
图1是本发明一实施方式中基于可插拔电池的DCDC电源并网方法的流程示意图；FIG. 1 is a schematic flowchart of a DCDC power grid connection method based on a pluggable battery in an embodiment of the present invention;
图2是本发明一具体示例硬件结构的示意图；Figure 2 is a schematic diagram of a specific example hardware structure of the present invention;
图3是本发明一具体示例中CC-CV模块的工作原理示意图；Fig. 3 is a schematic diagram of the working principle of the CC-CV module in a specific example of the present invention;
图4是本发明一具体示例中各个优先级别步进获取相应的电路结构示意图；4 is a schematic diagram of the corresponding circuit structure of each priority level in a specific example of the present invention;
图5是本发明一实施方式中基于可插拔电池的DCDC电源并网系统的模块示意图。5 is a schematic diagram of modules of a DCDC power grid-connected system based on a pluggable battery in an embodiment of the present invention.
具体实施方式detailed description
以下将结合附图所示的具体实施方式对本发明进行详细描述。但这些实施方式并不限制本发明，本领域的普通技术人员根据这些实施方式所做出的结构、方法、或功能上的变换均包含在本发明的保护范围内。The present invention will be described in detail below in conjunction with the specific embodiments shown in the drawings. However, these embodiments do not limit the present invention, and the structural, method, or functional changes made by those skilled in the art based on these embodiments are all included in the protection scope of the present invention.
如图1所示，本发明一实施方式中，基于可插拔电池的DCDC电源并网方法，所述方法包括：S1、获取接入同一负载的每个电池包的剩余容量；其中，接入同一负载的电池包中至少两个电池包同时期为接入的所述负载供电。As shown in FIG. 1, in an embodiment of the present invention, a DCDC power supply grid-connected method based on a pluggable battery includes: S1, obtaining the remaining capacity of each battery pack connected to the same load; where At least two of the battery packs of the same load simultaneously supply power to the connected load.
本发明具体实施方式中，采用DCDC并网的方式使多个电池包同时输出功率，以满足负载需求；其中，在本发明具体实施方式中，同时接入负载的电池包为多个，但对负载进行供电的电池包数量需要根据负载需要进行实时调整，且同时为负载供电的电池包为至少两个。In the specific embodiment of the present invention, the DCDC grid-connected method is adopted to make multiple battery packs output power at the same time to meet the load demand; among them, in the specific embodiment of the present invention, there are multiple battery packs connected to the load at the same time, but the The number of battery packs that the load supplies power needs to be adjusted in real time according to load needs, and there are at least two battery packs that supply power to the load at the same time.
通常情况下，当电池包接入负载后可通过硬件和/或的软件的方式读取电池包的剩余容量，本发明一可实现方式中，可使MCU通过SMBUS读取各个电池的容量，也可以是MCU通过ADC的方式读取电池的电压从而间接的获取电池的容量，在此不做进一步的赘述。Under normal circumstances, when the battery pack is connected to the load, the remaining capacity of the battery pack can be read by hardware and/or software. In an implementation manner of the present invention, the MCU can read the capacity of each battery through SMBUS. It may be that the MCU reads the voltage of the battery through the ADC to obtain the capacity of the battery indirectly, which will not be described further here.
S2、根据每个电池包的剩余容量获取每个电池包对应于所述负载的供电优先级别；其中，所述电池包的剩余容量越大，其对应的优先级别越高。S2. Acquire the power supply priority level of each battery pack corresponding to the load according to the remaining capacity of each battery pack; wherein, the greater the remaining capacity of the battery pack, the higher the corresponding priority level.
本发明一具体示例中，如图2所示，接入负载的电池包的数量为3个，其中，在某一监测时刻，获取到的信息为：电池包1剩余容量为80％，电池包2剩余容量为60％，电池包3剩余容量为40％，此时，将电池包1设置为1级，且其优先级别最高，电池包2设置为2级，其优先级别居中，电池包3设置为3级，其优先级别最低。In a specific example of the present invention, as shown in Figure 2, the number of battery packs connected to the load is 3, where at a certain monitoring moment, the information obtained is: the remaining capacity of battery pack 1 is 80%, and the battery pack 2 The remaining capacity is 60%, and the remaining capacity of battery pack 3 is 40%. At this time, set battery pack 1 to level 1, and its priority is the highest, battery pack 2 is set to level 2, its priority is in the middle, battery pack 3 Set to level 3, which has the lowest priority.
本发明一较佳实施方式中，所述步骤S2还包括：实时监测各个电池包的温度，若电池包温度大于系统预设温度阈值，则直接将其对应的优先级别调节为最低，直至电池包温度不大于系统预设温度阈值时，再根据所述电池包的剩余 容量调整其优先级别。In a preferred embodiment of the present invention, the step S2 further includes: monitoring the temperature of each battery pack in real time, and if the temperature of the battery pack is greater than the system preset temperature threshold, directly adjust its corresponding priority level to the lowest until the battery pack When the temperature is not greater than the system preset temperature threshold, the priority level of the battery pack is adjusted according to the remaining capacity of the battery pack.
所述预设温度阈值为一温度常数，其大小可以根据需要具体设定，通常情况下，该预设温度阈值与电池包的性能相关，当电池包的温度超过该预设温度阈值时，表示散热包的温度过高，有可能会发生故障，如此，将其优先级别调整为最低，以尽可能避免将其作为负载的供电源。The preset temperature threshold is a temperature constant, and its size can be specifically set according to needs. Normally, the preset temperature threshold is related to the performance of the battery pack. When the temperature of the battery pack exceeds the preset temperature threshold, it means If the temperature of the heat sink is too high, it may malfunction. Therefore, adjust its priority to the lowest level to avoid using it as a power supply for the load as much as possible.
S3、依照所述负载的需求，以优先级别自高到低的顺序对每个电池包的输出功率进行配比，其中，所述电池包的优先级别越高，其输出功率占负载所需供电功率的配比越大；S3. According to the requirements of the load, the output power of each battery pack is proportioned in the order of priority from high to low, wherein the higher the priority of the battery pack, the higher the output power of the battery pack accounts for the power required by the load The greater the power ratio;
本发明可实现方式中，可按照优先级别自高到低的顺序以递减的序列方式对各个电池包的输出功率进行配比，接续上述示例，假设负载所需功率为80瓦，每个电池包的最大输出功率可达60瓦，则可配置电池包1、电池包2、电池包3占有负载配比依次为50％，30％以及20％，即设置电池包1的输出功率为80瓦*50％＝40瓦，电池包2的输出功率为80瓦*30％＝24瓦，电池包3的输出功率为80瓦*20％＝16瓦。当然，较佳实施方式中，可按照优先级别自高到低的顺序以等差递减的序列方式对各个电池包的输出功率进行配比，在此不做进一步的赘述。In the achievable manner of the present invention, the output power of each battery pack can be matched in a descending sequence according to the priority level from high to low. Following the above example, assuming that the power required by the load is 80 watts, each battery pack The maximum output power of the battery pack can be up to 60 watts, and the load ratio of battery pack 1, battery pack 2, and battery pack 3 can be configured to be 50%, 30%, and 20%, that is, set the output power of battery pack 1 to 80 watts* 50%=40 watts, the output power of the battery pack 2 is 80 watts*30%=24 watts, and the output power of the battery pack 3 is 80 watts*20%=16 watts. Of course, in a preferred embodiment, the output power of each battery pack can be matched in an arithmetic decreasing sequence in the order of priority from high to low, and no further details will be given here.
本发明较佳实施方式中，所述步骤S3具体包括：调整优先级别高的电池包优先最大功率输出。同样以上述示例作为说明，假设负载所需功率为80瓦，每个电池包的最大输出功率可达60瓦；依据上述配置规则，则配置电池包1、电池包2、电池包3的输出功率依次为60瓦，80瓦-60瓦＝20瓦，0瓦，即电池包1以最大输出功率满功率输出，电池包2辅助补偿，电池包3暂时不输出功率；进一步的，当对负载供电一段时间后，由于各个电池包输出功率的不同，会导致各个电池包的容量变化，此时，需要根据电池包的容量变化持续调整各个电池包的供电优先级，进而使多个电池包剩余容量尽可能的保持一致，以使其提升各个电池包的利用率。In a preferred embodiment of the present invention, the step S3 specifically includes: adjusting the battery pack with a higher priority to give priority to the maximum power output. Also take the above example as an illustration, assuming that the power required by the load is 80 watts, the maximum output power of each battery pack can reach 60 watts; according to the above configuration rules, configure the output power of battery pack 1, battery pack 2, and battery pack 3. The order is 60 watts, 80 watts -60 watts = 20 watts, 0 watts, that is, battery pack 1 outputs at full power with maximum output power, battery pack 2 assists in compensation, and battery pack 3 temporarily does not output power; further, when supplying power to the load After a period of time, due to the different output power of each battery pack, the capacity of each battery pack will change. At this time, it is necessary to continuously adjust the power supply priority of each battery pack according to the capacity change of the battery pack to make the remaining capacity of multiple battery packs Keep it as consistent as possible to increase the utilization of each battery pack.
在其他实施方式中，假设负载功率增加至130瓦，此时，电池包1、电池包 2均以最大输出功率满功率输出，电池包3辅助补偿，即：调整电池包1、电池包2的输出功率分别为60瓦，调整电池包3的输出功率为10瓦，在此不做进一步的说明。In other embodiments, it is assumed that the load power is increased to 130 watts. At this time, the battery pack 1 and battery pack 2 are all output at full power with the maximum output power, and the battery pack 3 assists in compensation, that is: adjusting the battery pack 1 and battery pack 2 The output power is respectively 60 watts, and the output power of the battery pack 3 is adjusted to 10 watts, which will not be further explained here.
S4、在步骤S3之后，发送指令给各个电池包，以使其按照上述配比对负载输出功率。S4. After step S3, send instructions to each battery pack to make it output power to the load according to the above-mentioned ratio.
本发明较佳实施方式中，配置每个电池包通过独立的CC-CV模块接入负载。In the preferred embodiment of the present invention, each battery pack is configured to connect to the load through an independent CC-CV module.
所述CC-CV模块，指当实际输出电流小于电流环的设定值时电压环控制DCDC的输出电压，以稳定输出电压的值不变，指当实际输出电流大于等于电流环的设定值时，DCDC的输出电压开始改变以维持输出电流的稳定。The CC-CV module refers to when the actual output current is less than the set value of the current loop, the voltage loop controls the DCDC output voltage to stabilize the value of the output voltage. It refers to when the actual output current is greater than or equal to the set value of the current loop At that time, the output voltage of DCDC begins to change to maintain the stability of the output current.
本发明具体实施方式中，所述步骤S4具体包括：实时监测每一CC-CV模块的电流反馈环路对应的实际输出电流值是否小于预设电流值，若是，驱动电压环路正常工作，电流环路停止工作，且对应的输出功率为预设电压值*实际输出电流值；若否，驱动电压环路停止工作，电流环路正常工作，且对应的输出功率为实际输出电压值*预设电流值。In the specific embodiment of the present invention, the step S4 specifically includes: real-time monitoring of whether the actual output current value corresponding to the current feedback loop of each CC-CV module is less than the preset current value, if so, the driving voltage loop works normally, and the current The loop stops working, and the corresponding output power is the preset voltage value * actual output current value; if not, the drive voltage loop stops working, the current loop works normally, and the corresponding output power is the actual output voltage value * preset Current value.
结合图3所示，本发明一具体示例中，以其中一个电池包连接的CC-CV模块为例做具体介绍，VBAT表示电池包的供电电压，RL表示负载，VOUT表示CC-CV模块的实际输出电压值，IOUT表示输出给负载的实际输出电流值，IOUT＝VOUT/RL；电流采样电路获取实际输出电流值IOUT，与预设电流值IREF经过电流比较补偿电路控制CC-CV模块的输出状况；电压采样电路获取实际输出电压值，与预设电压值VREF经过电压比较补偿电路控制CC-CV模块的输出状况；假设电压反馈环路设定的预设电压值VREF为VMAX,电流反馈环路设定的预设电流值IREF为IMAX；当负载值RL比较大时，实际输出电流值为：IOUT＝VMAX/RL<IMAX，此时，电压环路正常工作，电流环路不工作，对负载输出功率为P＝VMAX*IOUT(IOUT<IMAX)；假设RL的值越来越小，IOUT越来越大，当IOUT>＝IMAX值时，电流环路开始工作，电压环路不工作，此时，输出电流恒定，电压变化。实际输出电压值为：VOUT＝IMAX*RL；对负载输出功率为P＝ VOUT*IMAX(VOUT<VMAX)。通过上述结果推导得出：每一电池包对负载的最大输出功率为：P＝VMAX*IMAX(IOUT＝IMAX时，成立)。As shown in Figure 3, in a specific example of the present invention, a CC-CV module connected to one of the battery packs is taken as an example for specific introduction. VBAT represents the power supply voltage of the battery pack, RL represents the load, and VOUT represents the actual CC-CV module. Output voltage value, IOUT represents the actual output current value output to the load, IOUT=VOUT/RL; the current sampling circuit obtains the actual output current value IOUT, and the preset current value IREF is used to control the output status of the CC-CV module through the current comparison compensation circuit ; The voltage sampling circuit obtains the actual output voltage value, and the voltage comparison compensation circuit controls the output status of the CC-CV module with the preset voltage value VREF; assuming that the preset voltage value VREF set by the voltage feedback loop is VMAX, the current feedback loop The set preset current value IREF is IMAX; when the load value RL is relatively large, the actual output current value is: IOUT=VMAX/RL<IMAX, at this time, the voltage loop works normally, the current loop does not work, and the load The output power is P=VMAX*IOUT(IOUT<IMAX); assuming that the value of RL becomes smaller and smaller, IOUT becomes larger and larger. When IOUT>=IMAX value, the current loop starts to work and the voltage loop does not work. When the output current is constant, the voltage changes. The actual output voltage value is: VOUT=IMAX*RL; the output power to the load is P=VOUT*IMAX (VOUT<VMAX). Derived from the above results: the maximum output power of each battery pack to the load is: P=VMAX*IMAX (when IOUT=IMAX, it is established).
CC-CV模块并网是指将两路CC-CV模块的输出直接并联，对于理想电压源是不能直接并联的，但是针对CC-CV模块而言，合理设置反馈参数是可行的。当多路CC-CV模块并联时，输出的电压由设定最高的CC-CV模块决定。Grid-connected CC-CV module refers to the direct parallel connection of the outputs of two CC-CV modules. For an ideal voltage source, it cannot be directly connected in parallel, but for the CC-CV module, it is feasible to set the feedback parameters reasonably. When multiple CC-CV modules are connected in parallel, the output voltage is determined by the CC-CV module with the highest setting.
本发明较佳实施方式中，为了保证优先级别高的电池包优先最大功率输出，所述步骤S2还包括：调整每个电池包通过CC-CV模块输入至负载的预设电压值，以优先级别自高到低的顺序使每个电池包对应的预设电压值按降序排列。In a preferred embodiment of the present invention, in order to ensure that the battery packs with a high priority level give priority to the maximum power output, the step S2 further includes: adjusting the preset voltage value of each battery pack input to the load through the CC-CV module to the priority level From high to low, the preset voltage values corresponding to each battery pack are arranged in descending order.
本发明一具体实施方式中，调整优先级别相邻的电池包的预设电压值的步进为IMAX*RE，其中，所述IMAX表示预设电流值，所述RE表示CC-CV模块的内阻。In a specific embodiment of the present invention, the step of adjusting the preset voltage value of the battery packs adjacent to the priority level is IMAX*RE, where the IMAX represents the preset current value, and the RE represents the internal value of the CC-CV module. Hinder.
结合图4所示，基于负载端，每一个CC-CV模块可看成空载输出电压为VSET,内阻为RE的直流电源，VOUT是从负载端测得的实际输入电压值，则VOUT＝VSET-IOUT*RE；该实施方式中，加上负载，每个CC-CV模块的输出功率主要由设定电压高的CC-CV模块提供；本发明具体实施方式中，保证输出电压设定高的CC-CV模块在负载电流等于IMAX时，电压仍然大于次优先级输出的CC-CV模块设定的输出电压，即可保证调控的实现，即调节的步进为IMAX*RE。假设多电池包系统中的电池包数量为N，MCU依据电池包的信息决定对应于每个电池包CC-CV模块放电的优先级别，MCU通过调控按优先级别自高至低的顺序排列的CC-CV模块的输出电压分别为：As shown in Figure 4, based on the load side, each CC-CV module can be regarded as a DC power supply with no-load output voltage of VSET and internal resistance of RE. VOUT is the actual input voltage value measured from the load side, then VOUT= VSET-IOUT*RE; In this embodiment, with a load, the output power of each CC-CV module is mainly provided by the CC-CV module with a high set voltage; in the specific embodiment of the present invention, it is ensured that the output voltage is set high When the load current of the CC-CV module is equal to IMAX, the voltage is still greater than the output voltage set by the CC-CV module with the second priority output, which can ensure the realization of regulation, that is, the adjustment step is IMAX*RE. Assuming that the number of battery packs in a multi-battery pack system is N, the MCU determines the discharge priority level of the CC-CV module corresponding to each battery pack according to the battery pack information. The MCU regulates the CCs that are arranged in the order of priority from highest to lowest. The output voltages of -CV module are:
VOUT+N*IMAX*RE，VOUT+(N-1)*IMAX*RE，...，VOUT+(N-N)*IMAX*RE；如此，由于各个电池包优先级别的设定由MCU决定，MCU可按照电池包的状态实时调节放电的优先级，提高电池包的电量的利用率。VOUT+N*IMAX*RE, VOUT+(N-1)*IMAX*RE,..., VOUT+(NN)*IMAX*RE; so, since the priority level of each battery pack is set by the MCU, the MCU can follow The state of the battery pack adjusts the priority of discharge in real time to improve the utilization rate of the battery pack's power.
结合图5所示，本发明一实施方式，提供的基于可插拔电池的DCDC电源并网系统包括：获取模块100，级别匹配模块200，调整模块300，输出模块400以及配置模块500。As shown in FIG. 5, an embodiment of the present invention provides a DCDC power grid-connected system based on a pluggable battery including: an acquisition module 100, a level matching module 200, an adjustment module 300, an output module 400, and a configuration module 500.
获取模块100用于获取接入同一负载的每个电池包的剩余容量；其中，接入同一负载的电池包中至少两个电池包同时期为接入的所述负载供电。The obtaining module 100 is configured to obtain the remaining capacity of each battery pack connected to the same load; wherein at least two battery packs of the battery packs connected to the same load supply power to the connected load at the same time.
级别匹配模块200用于根据每个电池包的剩余容量获取每个电池包对应于所述负载的供电优先级别；其中，所述电池包的剩余容量越大，其对应的优先级别越高。The level matching module 200 is configured to obtain the power supply priority level of each battery pack corresponding to the load according to the remaining capacity of each battery pack; wherein, the greater the remaining capacity of the battery pack, the higher the corresponding priority level.
本发明一较佳实施方式中，级别匹配模块200还用于：实时监测各个电池包的温度，若电池包温度大于系统预设温度阈值，则直接将其对应的优先级别调节为最低，直至电池包温度不大于系统预设温度阈值时，再根据所述电池包的剩余容量调整其优先级别。In a preferred embodiment of the present invention, the level matching module 200 is also used to: monitor the temperature of each battery pack in real time, and if the temperature of the battery pack is greater than the system preset temperature threshold, directly adjust its corresponding priority level to the lowest until the battery pack temperature When the pack temperature is not greater than the system preset temperature threshold, the priority level of the battery pack is adjusted according to the remaining capacity of the battery pack.
调整模块300用于依照所述负载的需求，以优先级别自高到低的顺序对每个电池包的输出功率进行配比，其中，所述电池包的优先级别越高，其输出功率占负载所需供电功率的配比越大。The adjustment module 300 is used for matching the output power of each battery pack in the order of priority from high to low according to the requirements of the load. The higher the priority of the battery pack, the higher the output power of the battery pack. The greater the ratio of the required power supply.
本发明可实现方式中，调整模块300用于可按照优先级别自高到低的顺序以递减的序列方式对各个电池包的输出功率进行配比，较佳实施方式中，调整模块300用于可按照优先级别自高到低的顺序以等差递减的序列方式对各个电池包的输出功率进行配比，在此不做进一步的赘述。In the achievable manner of the present invention, the adjustment module 300 is used to match the output power of each battery pack in a descending sequence according to the priority level. In a preferred embodiment, the adjustment module 300 is used for The output power of each battery pack is matched in an arithmetic decreasing sequence in the order of priority from high to low, and no further details are given here.
本发明较佳实施方式中，调整模块300用于调整优先级别高的电池包优先最大功率输出。In a preferred embodiment of the present invention, the adjustment module 300 is used to adjust the maximum power output of the battery pack with a higher priority.
输出模块400用于发送指令给各个电池包，以使其按照上述配比对负载输出功率。The output module 400 is used to send instructions to each battery pack to make it output power to the load according to the above-mentioned ratio.
本发明较佳实施方式中，配置模块500配置每个电池包通过独立的CC-CV模块接入负载。In the preferred embodiment of the present invention, the configuration module 500 configures each battery pack to connect to the load through an independent CC-CV module.
所述CC-CV模块，指当实际输出电流小于电流环的设定值时电压环控制DCDC的输出电压，以稳定输出电压的值不变，指当实际输出电流大于等于电流环的设定值时，DCDC的输出电压开始改变以维持输出电流的稳定。The CC-CV module refers to when the actual output current is less than the set value of the current loop, the voltage loop controls the DCDC output voltage to stabilize the value of the output voltage. It refers to when the actual output current is greater than or equal to the set value of the current loop At that time, the output voltage of DCDC begins to change to maintain the stability of the output current.
本发明具体实施方式中，输出模块400具体用于实时监测每一CC-CV模块 的电流反馈环路对应的实际输出电流值是否小于预设电流值，若是，驱动电压环路正常工作，电流环路停止工作，且对应的输出功率为预设电压值*实际输出电流值；若否，驱动电压环路停止工作，电流环路正常工作，且对应的输出功率为实际输出电压值*预设电流值。In the specific embodiment of the present invention, the output module 400 is specifically used to monitor in real time whether the actual output current value corresponding to the current feedback loop of each CC-CV module is less than the preset current value. If so, the drive voltage loop works normally, and the current loop The circuit stops working, and the corresponding output power is the preset voltage value * actual output current value; if not, the drive voltage loop stops working, the current loop works normally, and the corresponding output power is the actual output voltage value * preset current value.
结合图3所示，本发明一具体示例中，以其中一个电池包连接的CC-CV模块为例做具体介绍，VBAT表示电池包的供电电压，RL表示负载，VOUT表示CC-CV模块的实际输出电压值，IOUT表示输出给负载的实际输出电流值，IOUT＝VOUT/RL；电流采样电路获取实际输出电流值IOUT，与预设电流值IREF经过电流比较补偿电路控制CC-CV模块的输出状况；电压采样电路获取实际输出电压值，与预设电压值VREF经过电压比较补偿电路控制CC-CV模块的输出状况；假设电压反馈环路设定的预设电压值VREF为VMAX,电流反馈环路设定的预设电流值IREF为IMAX；当负载值RL比较大时，实际输出电流值为：IOUT＝VMAX/RL<IMAX，此时，电压环路正常工作，电流环路不工作，对负载输出功率为P＝VMAX*IOUT(IOUT<IMAX)；假设RL的值越来越小，IOUT越来越大，当IOUT>＝IMAX值时，电流环路开始工作，电压环路不工作，此时，输出电流恒定，电压变化。实际输出电压值为：VOUT＝IMAX*RL；对负载输出功率为P＝VOUT*IMAX(VOUT<VMAX)。通过上述结果推导得出：每一电池包对负载的最大输出功率为：P＝VMAX*IMAX(IOUT＝IMAX时，成立)。As shown in Figure 3, in a specific example of the present invention, a CC-CV module connected to one of the battery packs is taken as an example for specific introduction. VBAT represents the power supply voltage of the battery pack, RL represents the load, and VOUT represents the actual CC-CV module. Output voltage value, IOUT represents the actual output current value output to the load, IOUT=VOUT/RL; the current sampling circuit obtains the actual output current value IOUT, and the preset current value IREF is used to control the output status of the CC-CV module through the current comparison compensation circuit ; The voltage sampling circuit obtains the actual output voltage value, and the voltage comparison compensation circuit controls the output status of the CC-CV module with the preset voltage value VREF; assuming that the preset voltage value VREF set by the voltage feedback loop is VMAX, the current feedback loop The set preset current value IREF is IMAX; when the load value RL is relatively large, the actual output current value is: IOUT=VMAX/RL<IMAX, at this time, the voltage loop works normally, the current loop does not work, and the load The output power is P=VMAX*IOUT(IOUT<IMAX); assuming that the value of RL becomes smaller and smaller, IOUT becomes larger and larger. When IOUT>=IMAX value, the current loop starts to work and the voltage loop does not work. When the output current is constant, the voltage changes. The actual output voltage value is: VOUT=IMAX*RL; the output power to the load is P=VOUT*IMAX (VOUT<VMAX). Derived from the above results: the maximum output power of each battery pack to the load is: P=VMAX*IMAX (when IOUT=IMAX, it is established).
CC-CV模块并网是指将两路CC-CV模块的输出直接并联，对于理想电压源是不能直接并联的，但是针对CC-CV模块而言，合理设置反馈参数是可行的。当多路CC-CV模块并联时，输出的电压由设定最高的CC-CV模块决定。Grid-connected CC-CV module refers to the direct parallel connection of the outputs of two CC-CV modules. For an ideal voltage source, it cannot be directly connected in parallel, but for the CC-CV module, it is feasible to set the feedback parameters reasonably. When multiple CC-CV modules are connected in parallel, the output voltage is determined by the CC-CV module with the highest setting.
本发明较佳实施方式中，为了保证优先级别高的电池包优先最大功率输出，所述级别匹配模块200还用于调整每个电池包通过CC-CV模块输入至负载的预设电压值，以优先级别自高到低的顺序使每个电池包对应的预设电压值按降序排列。In a preferred embodiment of the present invention, in order to ensure that battery packs with a high priority level give priority to maximum power output, the level matching module 200 is also used to adjust the preset voltage value of each battery pack input to the load through the CC-CV module to The order of priority from high to low causes the preset voltage value corresponding to each battery pack to be arranged in descending order.
本发明一具体实施方式中，所述级别匹配模块200调整优先级别相邻的电 池包的预设电压值的步进为IMAX*RE，其中，所述IMAX表示预设电流值，所述RE表示CC-CV模块的内阻。In a specific embodiment of the present invention, the step by which the level matching module 200 adjusts the preset voltage value of the battery packs adjacent to the priority level is IMAX*RE, where the IMAX represents the preset current value, and the RE represents The internal resistance of the CC-CV module.
结合图4所示，基于负载端，每一个CC-CV模块可看成空载输出电压为VSET,内阻为RE的直流电源，VOUT是从负载端测得的实际输入电压值，则VOUT＝VSET-IOUT*RE；该实施方式中，加上负载，每个CC-CV模块的输出功率主要由设定电压高的CC-CV模块提供；本发明具体实施方式中，保证输出电压设定高的CC-CV模块在负载电流等于IMAX时，电压仍然大于次优先级输出的CC-CV模块设定的输出电压，即可保证调控的实现，即调节的步进为IMAX*RE。假设多电池包系统中的电池包数量为N，MCU依据电池包的信息决定对应于每个电池包CC-CV模块放电的优先级别，MCU通过调控按优先级别自高至低的顺序排列的CC-CV模块的输出电压分别为：As shown in Figure 4, based on the load side, each CC-CV module can be regarded as a DC power supply with no-load output voltage of VSET and internal resistance of RE. VOUT is the actual input voltage value measured from the load side, then VOUT= VSET-IOUT*RE; In this embodiment, with a load, the output power of each CC-CV module is mainly provided by the CC-CV module with a high set voltage; in the specific embodiment of the present invention, it is ensured that the output voltage is set high When the load current of the CC-CV module is equal to IMAX, the voltage is still greater than the output voltage set by the CC-CV module with the second priority output, which can ensure the realization of regulation, that is, the adjustment step is IMAX*RE. Assuming that the number of battery packs in a multi-battery pack system is N, the MCU determines the discharge priority level of the CC-CV module corresponding to each battery pack according to the battery pack information. The MCU regulates the CCs that are arranged in the order of priority from highest to lowest. The output voltages of -CV module are:
VOUT+N*IMAX*RE，VOUT+(N-1)*IMAX*RE，...，VOUT+(N-N)*IMAX*RE；如此，由于各个电池包优先级别的设定由MCU决定，MCU可按照电池包的状态实时调节放电的优先级，提高电池包的电量的利用率。VOUT+N*IMAX*RE, VOUT+(N-1)*IMAX*RE,..., VOUT+(NN)*IMAX*RE; so, since the priority level of each battery pack is set by the MCU, the MCU can follow The state of the battery pack adjusts the priority of discharge in real time to improve the utilization rate of the battery pack's power.
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的方法实施方式中的对应过程可以参照系统和模块的具体工作过程在此不再赘述。Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the corresponding process in the method implementation described above can be referred to the specific working process of the system and the module and will not be repeated here.
综上所述，本发明的基于可插拔电池的DCDC电源并网方法及系统，根据各个电池包的容量配置其供电优先级别，以使容量高的电池包优先提供负载电流，进而提高可插拔电池包并联供电时电量的应用率，避免由于电池容量等差异导致的不能完全放完电的问题发生。In summary, the DCDC power grid-connected method and system based on pluggable batteries of the present invention configures its power supply priority level according to the capacity of each battery pack, so that battery packs with high capacity preferentially provide load current, thereby improving pluggability The application rate of power when the battery pack is pulled out in parallel to supply power to avoid the problem that the battery cannot be completely discharged due to differences in battery capacity.
为了描述的方便，描述以上装置时以功能分为各种模块分别描述。当然，在实施本发明时可以把各模块的功能在同一个或多个软件和/或硬件中实现。For the convenience of description, when describing the above device, the functions are divided into various modules and described separately. Of course, when implementing the present invention, the functions of each module can be implemented in the same one or more software and/or hardware.
以上所描述的装置实施方式仅仅是示意性的，其中所述作为分离部件说明的模块可以是或者也可以不是物理上分开的，作为模块显示的部件可以是或者也可以不是物理模块，即可以位于一个地方，或者也可以分布到多个网络模块 上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施方式方案的目的。本领域普通技术人员在不付出创造性劳动的情况下，即可以理解并实施。The device implementations described above are merely illustrative. The modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, that is, they may be located in One place, or it can be distributed to multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the objectives of the solutions of this embodiment. Those of ordinary skill in the art can understand and implement it without creative work.
应当理解，虽然本说明书按照实施方式加以描述，但并非每个实施方式仅包含一个独立的技术方案，说明书的这种叙述方式仅仅是为清楚起见，本领域技术人员应当将说明书作为一个整体，各实施方式中的技术方案也可以经适当组合，形成本领域技术人员可以理解的其他实施方式。It should be understood that although this specification is described in accordance with the embodiments, not every embodiment only includes an independent technical solution. This narration in the specification is only for clarity, and those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
上文所列出的一系列的详细说明仅仅是针对本发明的可行性实施方式的具体说明，它们并非用以限制本发明的保护范围，凡未脱离本发明技艺精神所作的等效实施方式或变更均应包含在本发明的保护范围之内。The series of detailed descriptions listed above are only specific descriptions of feasible implementations of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementations or implementations made without departing from the technical spirit of the present invention All changes shall be included in the protection scope of the present invention.

Claims (12)

  1. 一种基于可插拔电池的DCDC电源并网方法，其特征在于，所述方法包括：A DCDC power grid connection method based on a pluggable battery is characterized in that the method includes:
    S1、获取接入同一负载的每个电池包的剩余容量；其中，接入同一负载的电池包中至少两个电池包同时期为接入的所述负载供电；S1. Obtain the remaining capacity of each battery pack connected to the same load; wherein, at least two of the battery packs connected to the same load simultaneously supply power to the connected load;
    S2、根据每个电池包的剩余容量获取每个电池包对应于所述负载的供电优先级别；其中，所述电池包的剩余容量越大，其对应的优先级别越高；S2. Obtain the power supply priority level of each battery pack corresponding to the load according to the remaining capacity of each battery pack; wherein, the greater the remaining capacity of the battery pack, the higher the corresponding priority level;
    S3、依照所述负载的需求，以优先级别自高到低的顺序对每个电池包的输出功率进行配比，其中，所述电池包的优先级别越高，其输出功率占负载所需供电功率的配比越大；S3. According to the requirements of the load, the output power of each battery pack is proportioned in the order of priority from high to low, wherein the higher the priority of the battery pack, the higher the output power of the battery pack accounts for the power required by the load The greater the power ratio;
    S4、发送指令以按照配比输出功率。S4. Send instructions to output power according to the ratio.
  2. 根据权利要求1所述的基于可插拔电池的DCDC电源并网方法，其特征在于，所述步骤S2还包括：实时监测各个电池包的温度，若电池包温度大于系统预设温度阈值，则直接将其对应的优先级别调节为最低，直至电池包温度不大于系统预设温度阈值时，再根据所述电池包的剩余容量调整其优先级别。The DCDC power supply grid-connected method based on a pluggable battery according to claim 1, wherein said step S2 further comprises: real-time monitoring of the temperature of each battery pack, if the battery pack temperature is greater than the system preset temperature threshold, then The corresponding priority level is directly adjusted to the lowest level until the battery pack temperature is not greater than the system preset temperature threshold, and then the priority level is adjusted according to the remaining capacity of the battery pack.
  3. 根据权利要求1所述的基于可插拔电池的DCDC电源并网方法，其特征在于，所述步骤S3具体包括：调整优先级别高的电池包优先最大功率输出。The DCDC power supply grid-connecting method based on pluggable batteries according to claim 1, wherein the step S3 specifically includes: adjusting the battery pack with a higher priority to give priority to the maximum power output.
  4. 根据权利要求1所述的基于可插拔电池的DCDC电源并网方法，其特征在于，配置每个电池包通过独立的CC-CV模块接入负载；The DCDC power supply grid connection method based on pluggable batteries according to claim 1, wherein each battery pack is configured to connect to the load through an independent CC-CV module;
    所述步骤S4具体包括：The step S4 specifically includes:
    实时监测每一CC-CV模块的电流反馈环路对应的实际输出电流值是否小于预设电流值，Real-time monitoring of whether the actual output current value corresponding to the current feedback loop of each CC-CV module is less than the preset current value,
    若是，驱动电压环路正常工作，电流环路停止工作，且对应的输出功率为预设电压值*实际输出电流值；If yes, the drive voltage loop works normally, the current loop stops working, and the corresponding output power is the preset voltage value * actual output current value;
    若否，驱动电压环路停止工作，电流环路正常工作，且对应的输出功率为 实际输出电压值*预设电流值。If not, the driving voltage loop stops working, the current loop works normally, and the corresponding output power is the actual output voltage value * preset current value.
  5. 根据权利要求4所述的基于可插拔电池的DCDC电源并网方法，其特征在于，所述步骤S2还包括：The DCDC power supply grid connection method based on a pluggable battery according to claim 4, characterized in that, the step S2 further comprises:
    调整每个电池包通过CC-CV模块输入至负载的预设电压值，以优先级别自高到低的顺序使每个电池包对应的预设电压值按降序排列。Adjust the preset voltage value of each battery pack input to the load through the CC-CV module, and arrange the preset voltage value corresponding to each battery pack in descending order in order of priority from high to low.
  6. 根据权利要求5所述的基于可插拔电池的DCDC电源并网方法，其特征在于，所述步骤S2具体包括：The DCDC power supply grid-connecting method based on a pluggable battery according to claim 5, wherein the step S2 specifically includes:
    调整优先级别相邻的电池包的预设电压值的步进为IMAX*RE，其中，所述IMAX表示预设电流值，所述RE表示CC-CV模块的内阻。The step of adjusting the preset voltage value of the battery packs adjacent to the priority level is IMAX*RE, where the IMAX represents the preset current value, and the RE represents the internal resistance of the CC-CV module.
  7. 一种基于可插拔电池的DCDC电源并网系统，其特征在于，所述系统包括：A DCDC power grid-connected system based on a pluggable battery, characterized in that, the system includes:
    获取模块，用于取接入同一负载的每个电池包的剩余容量；其中，接入同一负载的电池包中至少两个电池包同时期为接入的所述负载供电；The obtaining module is used to obtain the remaining capacity of each battery pack connected to the same load; wherein at least two battery packs of the battery packs connected to the same load supply power to the connected load at the same time;
    级别匹配模块，用于根据每个电池包的剩余容量获取每个电池包对应于所述负载的供电优先级别；其中，所述电池包的剩余容量越大，其对应的优先级别越高；The level matching module is configured to obtain the power supply priority level of each battery pack corresponding to the load according to the remaining capacity of each battery pack; wherein, the greater the remaining capacity of the battery pack, the higher the corresponding priority level;
    调整模块，用于依照所述负载的需求，以优先级别自高到低的顺序对每个电池包的输出功率进行配比，其中，所述电池包的优先级别越高，其输出功率占负载所需供电功率的配比越大；The adjustment module is used to match the output power of each battery pack in the order of priority from high to low according to the demand of the load. The higher the priority of the battery pack, the higher the output power of the load. The greater the ratio of the required power supply;
    输出模块，用于发送指令以按照配比输出功率。The output module is used to send instructions to output power according to the ratio.
  8. 根据权利要求7所述的基于可插拔电池的DCDC电源并网系统，其特征在于，所述级别匹配模块还用于：实时监测各个电池包的温度，若电池包温度大于系统预设温度阈值，则直接将其对应的优先级别调节为最低，直至电池包温度不大于系统预设温度阈值时，再根据所述电池包的剩余容量调整其优先级别。The DCDC power supply grid-connected system based on a pluggable battery according to claim 7, wherein the level matching module is also used to: monitor the temperature of each battery pack in real time, and if the battery pack temperature is greater than the system preset temperature threshold , The corresponding priority level is directly adjusted to the lowest, until the battery pack temperature is not greater than the system preset temperature threshold, then the priority level is adjusted according to the remaining capacity of the battery pack.
  9. 根据权利要求7所述的基于可插拔电池的DCDC电源并网系统，其特征 在于，调整模块具体用于：调整优先级别高的电池包优先最大功率输出。The DCDC power supply grid-connected system based on a pluggable battery according to claim 7, wherein the adjustment module is specifically configured to adjust the battery pack with a higher priority to give priority to the maximum power output.
  10. 根据权利要求7所述的基于可插拔电池的DCDC电源并网系统，其特征在于，所述系统还包括：配置模块，用于配置每个电池包通过独立的CC-CV模块接入负载；The DCDC power supply grid-connected system based on a pluggable battery according to claim 7, wherein the system further comprises: a configuration module for configuring each battery pack to connect to the load through an independent CC-CV module;
    所述输出模块还用于：实时监测每一CC-CV模块的电流反馈环路对应的实际输出电流值是否小于预设电流值，The output module is also used to monitor in real time whether the actual output current value corresponding to the current feedback loop of each CC-CV module is less than the preset current value,
    若是，驱动电压环路正常工作，电流环路停止工作，且对应的输出功率为预设电压值*实际输出电流值；If yes, the drive voltage loop works normally, the current loop stops working, and the corresponding output power is the preset voltage value * actual output current value;
    若否，驱动电压环路停止工作，电流环路正常工作，且对应的输出功率为实际输出电压值*预设电流值。If not, the driving voltage loop stops working, the current loop works normally, and the corresponding output power is the actual output voltage value * the preset current value.
  11. 根据权利要求10所述的基于可插拔电池的DCDC电源并网系统，其特征在于，The DCDC power supply grid-connected system based on a pluggable battery according to claim 10, characterized in that:
    所述级别匹配模块还用于：调整每个电池包通过CC-CV模块输入至负载的预设电压值，以优先级别自高到低的顺序使每个电池包对应的预设电压值按降序排列。The level matching module is also used to adjust the preset voltage value of each battery pack input to the load through the CC-CV module, and make the preset voltage value corresponding to each battery pack in descending order in the order of priority level from high to low arrangement.
  12. 根据权利要求11所述的基于可插拔电池的DCDC电源并网系统，其特征在于，所述级别匹配模块具体用于：The DCDC power supply grid-connected system based on a pluggable battery according to claim 11, wherein the level matching module is specifically used for:
    调整优先级别相邻的电池包的预设电压值的步进为IMAX*RE，其中，所述IMAX表示预设电流值，所述RE表示CC-CV模块的内阻。The step of adjusting the preset voltage value of the battery packs adjacent to the priority level is IMAX*RE, where the IMAX represents the preset current value, and the RE represents the internal resistance of the CC-CV module.
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