A protection device for protecting a BMS from an inverter surge

Abstract

The application relates to the field of energy storage power supplies, and discloses a protection device for the impact of an inverter surge on a BMS. In the application, the protection device comprises a battery B1, a BMS, an inverter Inverter and a surge device. The output end of the battery B1 is connected with the input end of the inverter Inverter, and the output end of the inverter Inverter is connected with an external load or circuit needing power supply; the surge device is connected in parallel in the input side circuit of the BMS as a protection element; the surge device is a transient voltage suppressor, can rapidly change the impedance from high to low when abnormal overvoltage occurs during the use of the inverter, thereby absorbing transient overcurrent, clamping the overvoltage at a safe level, and avoiding damage to electronic elements; when the circuit normally works, the surge device is in a cut-off state and does not affect the circuit operation; through the effective suppression and filtering effect on the transient voltage and current in the control circuit, the BMS of the battery can be effectively protected from the damage of the inverter surge impact, and the stable operation of the battery management system is ensured.

Description

Technical Field

[0001] This application belongs to the field of energy storage power technology, specifically a protection device for inverter surges impacting the BMS. Background Technology

[0002] A Battery Management System (BMS) is an electronic system used to monitor, control, and optimize the performance of energy storage batteries. It is widely used in new energy vehicles, energy storage power stations, power tools, uninterruptible power supplies (UPS), and various renewable energy systems. By collecting key parameters such as voltage, current, and temperature of each individual battery cell in the battery pack, the BMS enables real-time monitoring and diagnosis of the battery's state, ensuring that the battery operates within a safe and efficient range. Its main functions include state of charge (SOC), state of equilibrium (SOH), thermal management, fault protection, and communication interfaces. These functions effectively extend battery life, improve system reliability, and prevent safety hazards such as overcharging, over-discharging, and short circuits. Furthermore, the BMS has the ability to interact with external systems (such as charging piles and energy storage inverters), supporting remote monitoring and intelligent scheduling. It is one of the core technologies for realizing the intelligent, green, and sustainable development of battery systems.

[0003] However, currently available energy storage batteries generally lack surge protection against inverters, which poses a significant challenge in addressing the problems caused by various inverters and complex environments during operation. Therefore, there is an urgent need for a device to protect the battery management system (BMS) of energy storage batteries. Utility Model Content

[0004] The purpose of this application is to provide a protection device for inverter surges to impact the BMS in order to solve the problems mentioned above.

[0005] The technical solution adopted in this application is as follows: a protection device for inverter surge impact on BMS, comprising: battery B1, BMS, inverter and surge device.

[0006] In a preferred embodiment, the output terminal of the battery B1 is connected to the input terminal of the inverter.

[0007] The output of the inverter is connected to an external load or circuit that requires power.

[0008] The BMS (Battery Management System) is the core module for monitoring and managing battery status. Its signal acquisition terminal is directly connected to the positive and negative terminals of battery B1 to monitor battery parameters such as voltage and current in real time.

[0009] The surge protection device is connected in parallel to the input circuit of the BMS (i.e., the connection line between battery B1 and BMS) as a protective element.

[0010] In a preferred embodiment, the diode and capacitor C1 in the surge device are connected via circuit wiring to the line between the output terminal of battery B1 and the input terminal of BMS, forming a path for suppressing transient voltages. This connection method allows the surge device to directly clamp and absorb the overvoltage transmitted to the BMS when the inverter generates a surge voltage due to abnormal operation, thereby protecting the BMS from impact.

[0011] In a preferred embodiment, the surge device includes diodes D1, D2, D5, D6, D9, D10, D13, D14, and capacitor C1.

[0012] In a preferred embodiment, diodes D1, D2, D5, D6, D9, D10, D13, and D14 are all SMDJ110A.

[0013] In a preferred embodiment, the capacitor C1 is of type 102 / 1KV.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are:

[0015] In this application, the surge protection device is a transient voltage suppressor that can quickly change its impedance from high to low when an abnormal overvoltage occurs during inverter operation, thereby absorbing the transient overcurrent and protecting the downstream circuit. When the circuit is operating normally, the surge protection device is in the off state and does not affect the circuit operation; once the voltage exceeds its breakdown voltage, the surge protection device will quickly conduct, clamping the overvoltage to a safe level, avoiding damage to electronic components, and thus protecting the battery's BMS. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the device circuit of this application. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] Example:

[0019] Reference Figure 1A surge protection device for inverters to protect against BMS surges includes: battery B1, BMS, inverter, and surge protection device.

[0020] The output terminal of battery B1 is connected to the input terminal of the inverter.

[0021] The output of the inverter is connected to an external load or circuit that requires power.

[0022] The BMS (Battery Management System) is the core module for monitoring and managing battery status. Its signal acquisition terminal is directly connected to the positive and negative terminals of battery B1 to monitor battery parameters such as voltage and current in real time.

[0023] The surge protection device is connected in parallel to the input circuit of the BMS (i.e., the connection line between battery B1 and BMS) as a protective element.

[0024] The diode and capacitor C1 in the surge protector are connected via circuit wiring between the output terminal of battery B1 and the input terminal of the BMS, forming a path to suppress transient voltages. This connection method allows the surge protector to directly clamp and absorb the overvoltage transmitted to the BMS when the inverter generates a surge voltage due to abnormal operation, thereby protecting the BMS from the impact.

[0025] The surge protection device includes diodes D1, D2, D5, D6, D9, D10, D13, D14, and capacitor C1.

[0026] Diodes D1, D2, D5, D6, D9, D10, D13, and D14 are all model SMDJ110A.

[0027] The capacitor C1 is a 102 / 1KV capacitor.

[0028] In this application, the surge protection device is a transient voltage suppressor that can quickly change its impedance from high to low when an abnormal overvoltage occurs during inverter operation, thereby absorbing the transient overcurrent and protecting the downstream circuit. When the circuit is operating normally, the surge protection device is in the off state and does not affect the circuit operation; once the voltage exceeds its breakdown voltage, the surge protection device will quickly conduct, clamping the overvoltage to a safe level, avoiding damage to electronic components, and thus protecting the battery's BMS.

[0029] The beneficial effect of this inverter surge protection device against BMS impact is that, as a transient voltage suppressor, the surge device can quickly change the impedance from high to low when abnormal overvoltage occurs during inverter operation, thereby absorbing the instantaneous overcurrent and clamping the overvoltage to a safe level to avoid damage to electronic components. When the circuit is operating normally, the surge device is in the off state and does not affect the circuit operation. Through this effective suppression and filtering of transient voltage and current in the control circuit, the battery's BMS can be effectively protected from inverter surge impact, ensuring the stable operation of the battery management system.

[0030] The implementation principle of the inverter surge protection device embodiment of this application is as follows: the surge device acts as a transient voltage suppressor. When the circuit is working normally, it is in the off state and will not affect the circuit operation. When an abnormal overvoltage occurs during the use of the inverter and the voltage exceeds the breakdown voltage of the surge device, the surge device will quickly change its own impedance from a high impedance state to a low impedance state, absorb the instantaneous overcurrent by conducting, and clamp the overvoltage within a safe level range, so as to avoid damage to downstream electronic components caused by excessive voltage and current, thereby effectively protecting the battery's BMS (Battery Management System) from the impact of inverter surge.

[0031] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A protection device for inverter surges impacting the BMS, characterized in that: include: Battery B1, BMS, Inverter and surge protection device; The output terminal of battery B1 is connected to the input terminal of inverter. The output of the inverter is connected to an external load or circuit that requires power. The signal acquisition terminal of the BMS is directly connected to the positive and negative terminals of the battery B1 to monitor the voltage and current parameters of the battery in real time. The surge protection device is connected in parallel to the input circuit of the BMS as a protective element; The diode and capacitor C1 in the surge device are connected to the line between the output terminal of battery B1 and the input terminal of BMS through circuit wiring. The surge device includes diodes D1, D2, D5, D6, D9, D10, D13, D14, and capacitor C1. The diodes D1, D2, D5, D6, D9, D10, D13, and D14 are all of model SMDJ110A.

2. The inverter surge protection device for BMS as described in claim 1, characterized in that: The capacitor C1 is a 102 / 1KV capacitor.

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