Multi-mode battery management system

Abstract

The utility model discloses a multi-mode battery management system, which relates to the field of batteries, and comprises a power supply module used as a power supply; the switch module is used for connecting the power supply module and the power supply control module; the power supply control module is used for converting the input direct current into required voltage for charging the battery module; compared with the prior art, the utility model has the beneficial effects that a multi-mode compatible technical scheme capable of supporting multiple power supply systems is developed, and stable alternating current power supply, generator power supply and solar power supply can be stably used; an MPPT function mode is adopted, when the input power supply capacity supply is insufficient, the power limit of an output load can be automatically adjusted, the input voltage is prevented from suddenly falling, the system can work in a smooth critical state, the normal working time of the system can be prolonged, a load battery system can be effectively protected, and voltage and current are prevented from rising and falling greatly.

Description

Technical Field

[0001] This utility model relates to the field of batteries, specifically a multi-mode battery management system. Background Technology

[0002] Current battery management technologies on the market are typically designed and developed for a single category, such as lithium batteries or lead-acid batteries, or for specific power supply systems, such as 220V / 380V AC mains power and industrial power. The overall system has limited support and single application, requiring improvement. Utility Model Content

[0003] The purpose of this invention is to provide a multi-mode battery management system to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A multi-mode battery management system, comprising:

[0006] The power supply module is used as a power source.

[0007] A switch module is used to connect the power supply module and the power supply control module.

[0008] The power supply control module is used to convert the input DC power into the voltage required for charging the battery module;

[0009] Battery module, used for battery charging and energy storage;

[0010] The power supply module is connected to the switch module, the switch module is connected to the power supply control module, and the power supply control module is connected to the battery module.

[0011] As a further improvement of this utility model, the power supply module includes solar power supply, mains power supply, and generator power supply.

[0012] As a further embodiment of this utility model: the switch module includes switch S1, switch S2, and switch S3. One end of switch S1 is connected to the power supply module, and the other end of switch S1 is connected to the power supply control module. One end of switch S2 is connected to the power supply module, and the other end of switch S2 is connected to the power supply control module. One end of switch S3 is connected to the power supply module, and the other end of switch S3 is connected to the power supply control module.

[0013] As a further embodiment of this utility model: the power supply control module includes a chip U1, model number YL7115. The CS pin of chip U1 is connected to one end of resistor RS, one end of capacitor C1, and the source of MOSFET MP0. The other end of capacitor C1 is grounded. The other end of resistor RS is connected to one end of resistor R1, the VIN pin of chip U1, and a switch module. The other end of resistor R1 is connected to one end of resistor R2, the MPPT pin of chip U1, and the other end of resistor R2 is grounded. The DRVP pin of chip U1 is connected to the gate of MOSFET MP0. The drain of MOSFET MP0 is connected to one end of inductor L0 and the drain of MOSFET MN0. The gate of MOSFET MN0 is connected to the DRVN pin of chip U1. The source of MOSFET MN0 is grounded. The other end of inductor L0 is connected to one end of capacitor C2, the BAT pin of chip U1, and a battery module. The other end of capacitor C2 is grounded. The RMC pin of chip U1 is connected to one end of an NTC thermistor. The other end of the NTC thermistor is grounded.

[0014] As a further embodiment of this utility model: the battery module includes a battery string. When the battery string consists of a single battery, the positive terminal of the battery is connected to the power supply control module, and the negative terminal of the battery is grounded. When the battery string consists of multiple batteries connected in series, the negative terminal of the previous battery is connected to the positive terminal of the next battery, the positive terminal of the first battery is connected to the power supply control module, and the negative terminal of the last battery is grounded.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model develops a multi-mode compatible technical solution that can support multiple power supply systems, and can be used stably with stable AC power supply, generator power supply and solar power supply; adopting the MPPT (maximum power point tracking) function mode, it can automatically adjust the power limit of the output load when the input power supply capacity is insufficient, avoid the sudden drop in input voltage, and make the system work in a smooth critical state, which can not only extend the normal working time of the system, but also effectively protect the load battery system and avoid large rises and falls in voltage and current. Attached Figure Description

[0016] Figure 1 This is a circuit diagram of a multi-mode battery management system.

[0017] Figure 2 This is a schematic diagram of the energy management loop for the battery module. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1 A multi-mode battery management system, comprising:

[0020] The power supply module is used as a power source.

[0021] A switch module is used to connect the power supply module and the power supply control module.

[0022] The power supply control module is used to convert the input DC power into the voltage required for charging the battery module;

[0023] Battery module, used for battery charging and energy storage;

[0024] The power supply module is connected to the switch module, the switch module is connected to the power supply control module, and the power supply control module is connected to the battery module.

[0025] In this embodiment: Please refer to Figure 1 The power supply module includes solar power, mains power, and generator power.

[0026] Here, the power supply example is solar power ( Figure 1 Solar-powered version), mains power supply ( Figure 1 It can be powered by AC-DC or generator, and there are no restrictions on the type of power supply in actual use. For example, wind power can also be used as a power supply.

[0027] In this embodiment: Please refer to Figure 1 The switch module includes switches S1, S2, and S3. One end of switch S1 is connected to the power supply module, and the other end of switch S1 is connected to the power supply control module. One end of switch S2 is connected to the power supply module, and the other end of switch S2 is connected to the power supply control module. One end of switch S3 is connected to the power supply module, and the other end of switch S3 is connected to the power supply control module.

[0028] The power supply can be manually switched via three hard switches K1, K2, and K3, or connected in parallel, allowing the system to autonomously select the power supply branch and achieve parallel power supply from multiple power sources. The power supply module then supplies 0-60V high voltage (VIN) to the power control module.

[0029] In this embodiment: Please refer to Figure 1The power supply control module includes chip U1, model YL7115. The CS pin of chip U1 is connected to one end of resistor RS, one end of capacitor C1, and the source of MOSFET MP0. The other end of capacitor C1 is grounded. The other end of resistor RS is connected to one end of resistor R1, the VIN pin of chip U1, and the switch module. The other end of resistor R1 is connected to one end of resistor R2, the MPPT pin of chip U1, and the other end of resistor R2 is grounded. The DRVP pin of chip U1 is connected to the gate of MOSFET MP0. The drain of MOSFET MP0 is connected to one end of inductor L0 and the drain of MOSFET MN0. The gate of MOSFET MN0 is connected to the DRVN pin of chip U1. The source of MOSFET MN0 is grounded. The other end of inductor L0 is connected to one end of capacitor C2, the BAT pin of chip U1, and the battery module. The other end of capacitor C2 is grounded. The RMC pin of chip U1 is connected to one end of NTC thermistor. The other end of NTC thermistor is grounded.

[0030] In MPPT (Maximum Power Point Tracking) mode, resistor R2 is a photoresistor. When powered by solar energy, the stronger the outdoor sunlight, the higher the resistance, resulting in a higher sampled voltage. At this time, the charging current can be set to its maximum value. Conversely, the weaker the sunlight, the lower the resistance, resulting in a lower sampled voltage and a reduced charging current, eventually reaching zero. Similarly, if powered by an external generator, the system's input voltage will decrease when the generator is operating at full load and low fuel level. In these situations, the MPPT mechanism can also be activated to maintain normal system operation to the maximum extent possible.

[0031] The NTC thermistor acquires temperature data in real time and feeds it back to chip U1 for adjustment. Under different power supply conditions, it can adaptively switch the battery power management state, significantly improving conversion efficiency.

[0032] Chip U1 dynamically adjusts the gate conduction status of MOSFETs MP0 and MN0 based on the voltage levels of the MPPT and RMC pins, thereby changing the voltage and current supplied to the battery module and achieving charging control.

[0033] In this embodiment: Please refer to Figure 1 and Figure 2 The battery module includes a battery string. When the battery string consists of a single battery, the positive terminal of the battery is connected to the power supply control module, and the negative terminal of the battery is grounded. When the battery string consists of multiple batteries connected in series, the negative terminal of the previous battery is connected to the positive terminal of the next battery, the positive terminal of the first battery is connected to the power supply control module, and the negative terminal of the last battery is grounded.

[0034] Figure 2This diagram illustrates the energy management loop of a battery module. On one hand, the actual operating voltage of the system will vary and fluctuate depending on the power supply source. On the other hand, the charging loop also differs depending on the load source, such as lithium batteries, lead-acid batteries, and nickel-metal hydride batteries. The DC-DC topology uses a cycle-by-cycle modulation method; changes in load cause changes in the loop energy, directly affecting the selection of the compensation network. Adjustments can be made according to the actual application to adapt to different application schemes.

[0035] The working principle of this utility model is as follows: the power supply module is used as a power source; the switch module is used to connect the power supply module and the power supply control module; the power supply control module is used to convert the input DC power into the voltage required for charging the battery module; the battery module is used to charge and store electrical energy.

[0036] Current battery management technologies on the market are typically designed and developed for a single category, such as lithium batteries or lead-acid batteries, or for specific power supply systems, such as 220V / 380V AC mains power and industrial power. The overall system has limited support and single application. This invention develops a multi-mode compatible technical solution that supports multiple power supply systems, and can be stably used with stable AC power supply, generator power supply, and solar power supply.

[0037] Under stable AC power supply conditions, the battery management system (BMS) can operate reliably. However, when the power supply system switches to generator or solar power, situations may arise such as insufficient or nearly depleted generator fuel, or insufficient sunlight (cloudy, rainy days, etc.), leading to insufficient power supply and a sharp drop in input current. At this time, the system's output load still requires a high power supply, causing a significant pull-down in input voltage, resulting in insufficient system power supply voltage and the entire BMS malfunctioning. This invention employs MPPT (Maximum Power Point Tracking) mode, which automatically adjusts the power limit of the output load when the input power supply is insufficient, preventing a sudden drop in input voltage. This solution allows the system to operate in a smoother critical state, extending the system's normal operating time and effectively protecting the load battery system from large fluctuations in voltage and current.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-mode battery management system, characterized in that, The multi-mode battery management system includes: The power supply module is used as a power source. A switch module is used to connect the power supply module and the power supply control module. The power supply control module is used to convert the input DC power into the voltage required for charging the battery module; Battery module, used for battery charging and energy storage; The power supply module is connected to the switch module, the switch module is connected to the power supply control module, and the power supply control module is connected to the battery module. The power supply control module includes chip U1, model YL7115. The CS pin of chip U1 is connected to one end of resistor RS, one end of capacitor C1, and the source (S) of MOSFET MP0. The other end of capacitor C1 is grounded. The other end of resistor RS is connected to one end of resistor R1, the VIN pin of chip U1, and the switch module. The other end of resistor R1 is connected to one end of resistor R2, the MPPT pin of chip U1, and the other end of resistor R2 is grounded. The DRVP pin of chip U1 is connected to the gate (G) of MOSFET MP0. The drain (D) of MOSFET MP0 is connected to one end of inductor L0 and the drain (D) of MOSFET MN0. The gate (G) of MOSFET MN0 is connected to the DRVN pin of chip U1. The source (S) of MOSFET MN0 is grounded. The other end of inductor L0 is connected to one end of capacitor C2, the BAT pin of chip U1, and the battery module. The other end of capacitor C2 is grounded. The RMC pin of chip U1 is connected to one end of an NTC thermistor. The other end of the NTC thermistor is grounded.

2. The multi-mode battery management system according to claim 1, characterized in that, The power supply module includes solar power, mains power, and generator power.

3. The multi-mode battery management system according to claim 1, characterized in that, The switch module includes switches S1, S2, and S3. One end of switch S1 is connected to the power supply module, and the other end of switch S1 is connected to the power supply control module. One end of switch S2 is connected to the power supply module, and the other end of switch S2 is connected to the power supply control module. One end of switch S3 is connected to the power supply module, and the other end of switch S3 is connected to the power supply control module.

4. The multi-mode battery management system according to claim 1, characterized in that, The battery module includes a battery string. When the battery string consists of a single battery, the positive terminal of the battery is connected to the power supply control module, and the negative terminal of the battery is grounded. When the battery string consists of multiple batteries connected in series, the negative terminal of the previous battery is connected to the positive terminal of the next battery, the positive terminal of the first battery is connected to the power supply control module, and the negative terminal of the last battery is grounded.

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