KR-20260062460-A - Battery system with surge protection and noise elimination functions

Abstract

The present disclosure relates to a battery system having surge protection and noise removal functions, and more specifically, comprises a battery pack that receives or outputs power through input/output terminals, a PRA provided between the input/output terminals and the battery pack and interrupts power input/output to and output to the battery pack, and a battery protection circuit provided between the battery pack and the PRA and protects the battery pack, wherein the battery protection circuit includes a surge protection circuit provided between the PRA and the battery pack and removes surge components included in the power, and a noise filter circuit provided between the surge protection circuit and the battery pack and removes noise components included in the power.

Inventors

• 윤재중
• 김태석
• 권경민

Assignees

• 충북대학교 산학협력단
• 주식회사 우진산전

Dates

Publication Date

20260507

Application Date

20241029

Claims (6)

1. A battery pack that receives or outputs power through input/output terminals; A PRA provided between the above input/output terminal and the battery pack, and controlling power input/output to and output to the battery pack; and A battery protection circuit provided between the battery pack and the PRA and protecting the battery pack; comprising The above battery protection circuit is A surge protection circuit provided between the above PRA and the above battery pack, which removes surge components included in the power; and A battery system having surge protection and noise removal functions, comprising: a noise filter circuit provided between the surge protection circuit and the battery pack, which removes noise components included in the power.
2. In paragraph 1, The above surge protection circuit is A varistor provided between the above input/output terminal and the noise filter circuit; A first diode provided between the varistor and the noise filter circuit; and A battery system having surge protection and noise removal functions, comprising: a first inductor provided between the varistor and the first diode.
3. In paragraph 1, The above noise filter circuit is A first capacitor provided between the surge protection circuit and the battery pack to eliminate differential mode noise; A first resistor provided between the first capacitor and the battery pack; A differential mode noise filter provided between the first resistor and the battery pack, comprising 2-1 and 2-2 capacitors and a second inductor; and A battery system having surge protection and noise removal functions, comprising: a common mode noise filter provided between the first resistor and the differential mode noise filter, and including a third inductor and third-1 and third-2 capacitors.
4. In paragraph 3, The above 2-1 capacitor is provided between the common mode noise filter and the battery pack, and The above 2-2 capacitor is provided between the above 2-1 capacitor and the battery pack, and The battery system having surge protection and noise removal functions, wherein the second inductor is provided between the second-1 and second-2 capacitors.
5. In paragraph 3, The third inductor is provided between the first resistor and the differential mode noise filter, and A battery system having surge protection and noise removal functions, wherein the above 3-1 and 3-2 capacitors are connected in series with each other and are provided between the above 3 inductor and the differential mode noise filter.
6. In paragraph 5, A battery case housing at least one of the battery pack, the PRA, and the battery protection circuit; further comprising A battery system having surge protection and noise removal functions, wherein the common node of the above 3-1 and 3-2 capacitors is grounded through the battery case.

Description

Battery system with surge protection and noise elimination functions The present disclosure relates to a battery system having surge protection and noise removal functions, and more specifically, to a battery system having surge protection and noise removal functions that can extend the life of a battery pack by simultaneously removing surge components and noise components included in the power applied to the battery pack. Recently, battery packs and battery systems utilizing them are being used in various industrial fields, such as electric vehicles and energy storage devices. FIG. 1 is a schematic diagram of a conventional battery system. Specifically, FIG. 1 illustrates an example of a battery system applied to an electric vehicle. A Battery System Assembly (BSA) refers to a device that combines various electrical components for managing a battery mounted on an electric vehicle. The BSA mainly includes a battery pack, a Battery Management System (BMS), a PRA, and a temperature control system. The battery pack includes a plurality of battery modules and stores energy. The BMS manages the battery pack. The PRA interrupts the electrical path between the battery pack and an external power source or load through relays. The temperature control system controls the temperature inside the battery system. FIG. 2 is a detailed schematic diagram of a conventional battery system. Referring to FIG. 2, a plurality of first to N battery modules are connected in series, and a Battery Supervisor is connected to each battery module to manage the battery module and determine the status of the battery module. Each battery module may include K battery cells. A PRA is connected between the first to N battery modules, a charger, and an inverter, and includes at least one relay. In the charging mode, the PRA transfers power provided by the charger to the battery pack to charge the battery pack, and in the discharging mode, transfers power provided by the battery pack to the inverter so that the motor can be driven. However, when the battery pack undergoes repeated charging and discharging, the battery pack ages. Generally, battery packs age within the warranty period, leading to frequent replacements. In particular, for high-capacity battery packs, the replacement cost is very high, posing a problem of significantly reduced economic efficiency during battery maintenance. The main factors causing battery pack aging include high charge/discharge rates, external temperature, noise and surge components included in the power supplied from the charger to the battery pack, and the number of battery charging cycles. A surge component refers to a voltage or current waveform that increases rapidly within a short period of time and is contained within the power. If a small surge component is continuously applied to a battery system, it causes battery cells to degrade, leading to a decrease in battery cell performance over the long term, while a large surge component destroys battery cells immediately upon application to the battery system. As a result, there is a very high probability that battery cell performance will degrade or that thermal runaway and electrolyte leakage will occur. In addition to surge components, noise components can be applied to battery systems. Noise components refer to unintended irregular fluctuations and disturbances contained within the power. If noise components are repeatedly transmitted, they cause the battery to degrade over a long period. As such, surge components and noise components are highly likely to occur during battery charging and discharging, and there is a need for technology to protect battery cells from these components. FIG. 1 is a schematic diagram of a conventional battery system. FIG. 2 is a detailed schematic diagram of a conventional battery system. FIG. 3 is a schematic diagram of a battery system according to an embodiment of the present disclosure. FIG. 4 is a detailed schematic diagram of a battery system according to an embodiment of the present disclosure. FIG. 5 is a circuit diagram of a battery protection circuit according to an embodiment of the present disclosure. The purpose, features, and advantages of the foregoing disclosure will become more apparent through the following embodiments in conjunction with the accompanying drawings. The following specific structural or functional descriptions are merely illustrative for the purpose of explaining embodiments according to the concept of the present disclosure, and embodiments according to the concept of the present disclosure may be implemented in various forms and should not be interpreted as being limited to the embodiments described in this specification or application. Since embodiments according to the concept of the present disclosure may be subject to various modifications and may take various forms, specific embodiments are illustrated in the drawings and described in detail in this specification or application. However,