CN221552829U - Surge-proof power supply circuit and battery management system - Google Patents
Surge-proof power supply circuit and battery management system Download PDFInfo
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- CN221552829U CN221552829U CN202323341254.3U CN202323341254U CN221552829U CN 221552829 U CN221552829 U CN 221552829U CN 202323341254 U CN202323341254 U CN 202323341254U CN 221552829 U CN221552829 U CN 221552829U
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Abstract
本实用新型公开了一种防浪涌电源电路和电池管理系统，防浪涌电源电路包括浪涌保护模块、过滤模块和电压转换模块；浪涌保护模块的输入端连接供电电源，浪涌保护模块包括瞬态抑制单元，瞬态抑制单元的其中一端与供电电源连接，瞬态抑制单元的另一端连接GND端，瞬态抑制单元用于在供电电源的供电电压超过预设阈值时导通浪涌保护模块；过滤模块连接浪涌保护模块的输出端，过滤模块用于滤除供电电源提供的电压中的噪声；电压转换模块的输入端连接过滤模块，电压转换模块用于将过滤模块稳定后的电压转换为电池管理系统的工作电压。本实用新型中的防浪涌电源电路能够输出稳定的电源。
The utility model discloses a surge protection power supply circuit and a battery management system. The surge protection power supply circuit includes a surge protection module, a filter module and a voltage conversion module; the input end of the surge protection module is connected to the power supply, the surge protection module includes a transient suppression unit, one end of the transient suppression unit is connected to the power supply, the other end of the transient suppression unit is connected to the GND end, and the transient suppression unit is used to turn on the surge protection module when the power supply voltage of the power supply exceeds a preset threshold; the filter module is connected to the output end of the surge protection module, and the filter module is used to filter out noise in the voltage provided by the power supply; the input end of the voltage conversion module is connected to the filter module, and the voltage conversion module is used to convert the stabilized voltage of the filter module into the working voltage of the battery management system. The surge protection power supply circuit in the utility model can output a stable power supply.
Description
Technical Field
The utility model relates to the technical field of power supply circuits, in particular to an anti-surge power supply circuit and a battery management system.
Background
The battery management system is mainly used for preventing the battery from being overcharged and overdischarged, prolonging the service life of the battery and monitoring the state of the battery. The stable supply of power in a battery management system has a great influence on the performance of the battery.
At present, a power circuit in a battery management system often has phenomena such as surge and the like, which can cause data error and circuit damage. For example, the surge phenomenon includes flashover: leaving a noticeable arc mark on the damaged part; corona: on the surface of the insulator, obvious electric corrosion traces exist, and the insulation of the corroded part is reduced; circuit element damage: the rectifying element and the voltage stabilizing element of the general electronic equipment and household appliances are damaged; ground faults become equipment live (single phase ground): causing short circuit between the device phases (motor phase short circuit), performance degradation, battery short, card machine restart, screen flicker, noisy sound, etc.
Disclosure of utility model
The utility model provides an anti-surge power supply circuit and a battery management system, which are used for solving the problem of power supply circuit surge phenomenon of the battery management system in the prior art.
According to an aspect of the present utility model, there is provided an anti-surge power supply circuit for providing a continuous and stable operating voltage to a battery management system, including a surge protection module, a filtering module, and a voltage conversion module;
The input end of the surge protection module is connected with a power supply, the surge protection module comprises a transient suppression unit, one end of the transient suppression unit is connected with the power supply, the other end of the transient suppression unit is connected with a GND end, and the transient suppression unit is used for conducting the surge protection module when the power supply voltage of the power supply exceeds a preset threshold value;
The filtering module is connected with the output end of the surge protection module and is used for filtering noise in the voltage provided by the power supply;
The input end of the voltage conversion module is connected with the filtering module, and the voltage conversion module is used for converting the voltage stabilized by the filtering module into the working voltage of the battery management system.
Optionally, the surge protection module further includes an overvoltage voltage division unit, the overvoltage voltage division unit is used for sharing the voltage of an overvoltage part when the power supply voltage of the power supply exceeds a preset threshold, and two ends of the overvoltage voltage division unit are connected with two ends of the transient suppression unit in parallel.
Optionally, the transient suppression unit includes a first diode, the overvoltage voltage division unit includes a capacitor group formed by connecting at least two capacitors in series, two ends of the first diode are connected to two ends of the capacitor group, and the capacitor group is used for guiding the overvoltage part to the eartv end for consumption when the supply voltage of the power supply exceeds a preset threshold.
Optionally, the capacitor group includes first electric capacity, second electric capacity, third electric capacity and fourth electric capacity, first electric capacity, second electric capacity, third electric capacity with fourth electric capacity series connection, first electric capacity with power supply is connected, fourth electric capacity with GND end is connected, the second electric capacity with the public tie point of third electric capacity with EARTH end is connected.
Optionally, a protection module is arranged between the transient suppression unit and the overvoltage voltage division unit, one end of the protection module is connected with one end of the transient suppression unit, and the other end of the protection module is connected with one end of the overvoltage voltage division unit and the power supply.
Optionally, the filtering module includes a first filtering unit, a second filtering unit and a third filtering unit, where the first filtering unit, the second filtering unit and the third filtering unit are sequentially connected; the first filtering unit comprises any one of an LC filtering circuit, an inductance filtering circuit or a capacitance filtering circuit; the second filtering unit comprises any one of an LC filtering circuit, an inductance filtering circuit or a capacitance filtering circuit; the third filtering unit comprises any one of an LC filtering circuit, an inductance filtering circuit or a capacitance filtering circuit.
Optionally, a unidirectional conduction module is arranged between the surge protection module and the filtering module, an input end of the unidirectional conduction module is connected with one end of the transient suppression unit and the power supply, an output end of the unidirectional conduction module is connected with the filtering module, and the unidirectional conduction module is used for unidirectional transmission of current.
Optionally, the voltage conversion module includes a buck converter and a peripheral circuit; the input end of the buck converter is connected with the filtering module and is used for converting the voltage output by the filtering module into the working voltage of the battery management system; the input end of the peripheral circuit is connected with the output end of the buck converter and is used for filtering noise in the voltage output by the buck converter.
Optionally, the peripheral circuit includes a filtering unit, the filtering unit includes a first inductor, a second diode and a fifth capacitor, a first end of the first inductor is connected to a first end of the second diode, a first end of the fifth capacitor and an output end of the buck converter, a second end of the first inductor is connected to an output end of the voltage conversion module, a second end of the second diode is grounded, and a second end of the fifth capacitor is connected to the buck converter.
According to another aspect of the present utility model, there is provided a battery management system including the anti-surge power supply circuit.
The technical scheme of the embodiment of the utility model provides an anti-surge power supply circuit which comprises a surge protection module, a filtering module and a voltage conversion module; the surge protection module is connected with the power supply, the surge protection module comprises a transient suppression unit, the transient suppression unit suppresses the output of the electric signal in the surge protection module when the electric signal in the surge protection module is larger than a preset threshold value, at the moment, the electric signal output by the power supply cannot be transmitted to the filtering module and the voltage conversion module through the surge protection module, the anti-surge power supply circuit does not have voltage signal output, and the input direct current is prevented from generating peak current or overload current which is far larger than steady-state current at the moment of power connection or under the abnormal condition of the circuit. The anti-surge power supply circuit can output stable power supply, and solves the problem of power supply circuit surge of a battery management system in the prior art.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the utility model or to delineate the scope of the utility model. Other features of the present utility model will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an anti-surge power supply circuit according to an embodiment of the present utility model;
fig. 2 is a circuit diagram of an anti-surge power supply circuit according to an embodiment of the present utility model.
Detailed Description
In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic structural diagram of an anti-surge power supply circuit according to an embodiment of the present utility model, where, as shown in fig. 1, the anti-surge power supply circuit includes a surge protection module 110, a filtering module 120, and a voltage conversion module 130; the input end a1 of the surge protection module 110 is connected with the power supply V1, the surge protection module 110 comprises a transient suppression unit, one end of the transient suppression unit is connected with the input end of the surge protection module 110, the other end of the transient suppression unit is connected with the GND end, and the transient suppression unit is used for conducting the surge protection module 110 when the power supply voltage of the power supply V1 exceeds a preset threshold value; the filtering module 120 is connected to the output end b1 of the surge protection module 110, and is used for filtering noise in the voltage provided by the power supply; the input terminal a2 of the voltage conversion module 130 is connected to the filter module 120, and the voltage conversion module 130 is configured to convert the voltage stabilized by the filter module 120 into an operating voltage of the battery management system.
In this embodiment, the surge protection module 110 is a module that generates a spike current or voltage to protect a circuit due to external interference, for example, the surge protection module 110 can conduct and shunt in a very short time to avoid damage to electrical components in the circuit by the surge, and the transient suppression unit is a unit that guides an excessive voltage to the ground or the power supply when the transient voltage of the circuit is too high, so as to protect other components in the circuit from damage. The filtering module 120 is a module for filtering out interference signals, for example, the anti-interference module 120 can filter out various interference signals in the power supply V1, and the filtering module 120 includes an inductance filtering circuit, a capacitance filtering circuit, and the like. The voltage conversion module 130 is a module for performing voltage conversion, for example, the voltage conversion module 130 may perform a step-down process on the input voltage to obtain a stable voltage, and output the stable voltage through the output terminal b 2.
In this embodiment, the power supply V1 is input to the surge protection module 110, and the surge protection module 110 can avoid that the electrical signal of the input dc power is greater than a preset threshold (i.e. a peak current or an overload current far greater than a steady current is generated) at the moment of power-on or in the case of abnormal circuit occurrence, for example, when the peak current or the overload current occurs in the circuit, the surge protection module 110 suppresses the output of the electrical signal in the surge protection module 110. When the electrical signal in the circuit is not greater than a preset value, the surge protection module 110 transmits the voltage output by the power supply V1 to the filtering module 120, the filtering module 120 filters various interference signals in the power supply V1, a smooth and stable voltage is output, and the voltage conversion module 130 obtains a stable voltage meeting the requirement through voltage reduction processing of the voltage output by the filtering module 120.
The technical scheme of the embodiment provides an anti-surge power supply circuit which comprises a surge protection module, a filtering module and a voltage conversion module; the surge protection module is connected with the power supply, the surge protection module comprises a transient suppression unit, the transient suppression unit suppresses the output of the electric signal in the surge protection module when the electric signal in the surge protection module is larger than a preset threshold value, at the moment, the electric signal output by the power supply cannot be transmitted to the filtering module and the voltage conversion module through the surge protection module, the anti-surge power supply circuit does not have voltage signal output, and the input direct current is prevented from generating peak current or overload current which is far larger than steady-state current at the moment of power connection or under the abnormal condition of the circuit. The anti-surge power supply circuit can output stable power supply, and solves the problem of power supply circuit surge of a battery management system in the prior art.
Fig. 2 is a circuit diagram of an anti-surge power supply circuit according to an embodiment of the present utility model, where, as shown in fig. 2, the surge protection module further includes an overvoltage voltage dividing unit, where the overvoltage voltage dividing unit is used to share a voltage of an overvoltage portion when a supply voltage of the power supply V1 exceeds a preset threshold, and two ends of the overvoltage voltage dividing unit are connected in parallel with two ends of the transient suppression unit. The transient suppression unit comprises a first diode D1, wherein a first end of the first diode D1 is connected with one end of the transient suppression unit, and a second end of the first diode D1 is connected with the other end of the transient suppression unit. The first diode D1 is a bidirectional transient suppression diode, which can be represented by two mutually opposite avalanche diodes connected in series with each other, which diodes are connected in parallel with the device or circuit to be protected, break down at a certain voltage level and conduct a large amount of current without damage. Under normal voltage conditions, the bidirectional transient suppression diode appears as an open circuit, but there is a small amount of leakage current, and when the normal voltage exceeds a preset value, the bidirectional transient suppression diode avalanche shunts the overvoltage away from the protected circuit and through the bidirectional transient suppression diode, e.g., directs an excessive voltage to ground to protect other components in the circuit from damage. When the overvoltage disappears, the bidirectional transient suppression diode can be automatically reset.
Specifically, the overvoltage voltage dividing unit includes a capacitor group formed by connecting at least two capacitors in series, and on the basis of the above embodiment, two ends of the first diode D1 are connected to two ends of the capacitor group, and the capacitor group is configured to guide the overvoltage portion to the EARTH end for consumption when the supply voltage of the power supply exceeds a preset threshold. The capacitor set includes a first capacitor C1, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4, where a first end of the first capacitor C1 is connected to a power supply, a second end of the first capacitor C1 is connected to a first end of the second capacitor C2, a second end of the second capacitor C2 and a first end of the third capacitor C3 are grounded, a second end of the third capacitor C3 is connected to a first end of the fourth capacitor C4, and a second end of the fourth capacitor C4 is connected to a GND end. The common connection point of the second capacitor C2 and the third capacitor C3 is connected to the EARTH terminal. The first capacitor C1, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4 form a series capacitor group.
With continued reference to fig. 2, a protection module is disposed between the transient suppression unit and the overvoltage voltage division unit, one end of the protection module is connected with one end of the transient suppression unit, and the other end of the protection module is connected with one end of the overvoltage voltage division unit and the power supply V1. The protection module includes a fuse F, a first end of the fuse F is connected to the power supply V1, a second end of the fuse F is connected to a first end of the first diode D1 and an output end b1 of the surge protection module 110, and the fuse F has an overload protection function.
With continued reference to fig. 2, a unidirectional conduction module is disposed between the surge protection module 110 and the filtering module 120, an input end of the unidirectional conduction module is connected with one end of the transient suppression unit and the power supply V1, an output end of the unidirectional conduction module is connected with the filtering module 120, and the unidirectional conduction module is used for unidirectional transmission of current. The unidirectional conduction module includes a third diode D3, a first end of the third diode D3 is connected to the output end b1 of the surge protection module 110, and a second end of the third diode D3 is connected to the filtering module 120.
In this embodiment, a third diode D3 is connected in series between the surge protection module 110 and the filtering module 120, where the third diode D3 adopts a schottky diode SS56C, and the schottky diode is mainly applied to the frequency converter, the switching power supply, the module power supply, the driving circuit, and the like, and is used as a rectifying diode, a protection diode, a freewheeling diode, and the like.
With continued reference to fig. 2, the filtering module 120 includes a first filtering unit, a second filtering unit, and a third filtering unit, which are sequentially connected; the first filtering unit comprises any one of an LC filtering circuit, an inductance filtering circuit or a capacitance filtering circuit; the second filtering unit comprises any one of an LC filtering circuit, an inductance filtering circuit or a capacitance filtering circuit; the third filter unit includes any one of an LC filter circuit, an inductance filter circuit, or a capacitance filter circuit.
The first filtering unit includes a second inductor L2, a sixth capacitor C6, and a seventh capacitor C7, where a first end of the second inductor L2 is connected to a first end of the sixth capacitor C6 and a second end of the third diode D3, a second end of the second inductor L2 is connected to a first end of the seventh capacitor C7 and the second filtering unit, and a second end of the sixth capacitor C6 and a second end of the seventh capacitor C7 are connected to the GND end. The second inductor L2, the sixth capacitor C6 and the seventh capacitor C7 form an LC low-pass filter circuit, which has a better anti-electromagnetic interference effect and can filter various interference signals in the signals output by the power supply V1.
The second filter unit includes a common-mode filter U1, a first resistor R1, and a second resistor R2, where a first end of the common-mode filter U1 is connected to the first filter unit and the first end of the first resistor R1, a second end of the common-mode filter U1, a third end of the common-mode filter U1, a first end of the second resistor R2, and a second end of the second resistor R2 are connected to the GND end, and a fourth end of the common-mode filter U1 is connected to the third filter unit and the second end of the first resistor R1. The third filtering unit includes an eighth capacitor C8, a ninth capacitor C9, and a tenth capacitor C10, where a first end of the eighth capacitor C8, a first end of the ninth capacitor C9, and a first end of the tenth capacitor C10 are connected to the second filtering unit and the voltage conversion module 130, and a second end of the eighth capacitor C8, a second end of the ninth capacitor C9, and a second end of the tenth capacitor C10 are grounded.
With reference to the above embodiment, the second filtering unit and the third filtering unit utilize energy stored in the circuit by a capacitor or an inductor to perform a filtering function, when the voltage (or current) of the input power supply V1 increases, the capacitor (or inductor) stores energy in the electric field (or magnetic field), and when the voltage (or current) decreases, the capacitor (or inductor) gradually releases the stored energy, so as to reduce the pulsating component in the output voltage (or current) and obtain a smoother dc voltage. The inductance filtering is suitable for large current, the larger the current is, the better the filtering effect is, and the output current is smoothed through electromagnetic induction generated by the inductance. The common mode filter U1 adopts an ACM7060-701-2PL-TL01 common mode filter, in a circuit, signals can be influenced by different interference sources, wherein one common interference is common mode interference, namely electromagnetic interference from an external environment, errors of the signal sources and the like, so that common mode components appear in the signals, the quality of the signals is finally reduced, and the common mode filter is mainly used for filtering the common mode interference in the signals, and the reliability and stability of signal transmission are ensured. The capacitor filtering directly stores the pulsating voltage, so that the output voltage is smoother, the capacitor filtering is suitable for small current, and the smaller the current is, the better the filtering effect is.
With continued reference to fig. 2, the voltage conversion module 130 includes a buck converter U2, an input terminal of the buck converter U2 is connected to the filter module 120, and is configured to convert the voltage output by the filter module 120 into an operating voltage of the battery management system, and an input terminal of the peripheral circuit is connected to an output terminal of the buck converter U2, and is configured to filter noise in the voltage output by the buck converter U2.
In this embodiment, the buck converter U2 adopts a SY8493FCC power converter, and the SY8493FCC power converter is a DC/DC converter with high efficiency, current mode self-adaptive constant off-time control and asynchronous buck, and can provide 3A output current. The SY8493FCC can operate over a wide input voltage range of 4.5V to 60V while minimizing inductance losses.
Specifically, the peripheral circuit includes a filtering unit, the filtering unit includes a first inductor L1, a second diode D2, and a fifth capacitor C5, a first end of the first inductor L1 is connected to a first end of the second diode D2, a first end of the fifth capacitor C5, and an output end of the buck converter U2, a second end of the first inductor L1 is connected to an output end b2 of the voltage conversion module 130, a second end of the second diode D2 is grounded, and a second end of the fifth capacitor C5 is connected to the buck converter U2.
In this embodiment, the peripheral circuit further includes a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, an eleventh capacitor C11, and a twelfth capacitor C12. Buck converter U2 includes pin IN (i.e., the input of buck converter U2), pin EN, pin FS, pin FB, pin GND, pin BS, pin LX (i.e., the output of buck converter U2).
The embodiment of the utility model also provides a battery management system, which comprises an anti-surge power supply circuit. The battery management system has the main functions of preventing the battery from being overcharged and overdischarged, prolonging the service life of the battery and monitoring the state of the battery. The battery management system comprises a power supply, the power supply supplies power for the battery management system so as to ensure the normal operation of the battery management system, and the stable power supply of the power supply in the battery management system has great influence on the performance of the battery.
In this embodiment, the surge protection module in the anti-surge power supply circuit is configured to suppress output of the electrical signal in the surge protection module when the input electrical signal in the surge protection module is greater than a preset threshold value, where the input electrical signal in the surge protection module is an electrical signal output by the power supply V1 (i.e., a power supply of the battery management system), at this time, the electrical signal output by the power supply cannot be transmitted to the anti-interference module, the inductance filtering module, the capacitance filtering module and the voltage conversion module through the surge protection module, the anti-surge power supply circuit does not have voltage signal output, so that the input direct current is prevented from generating a peak current or an overload current far greater than a steady current at a moment of power connection or under an abnormal condition of the circuit, the anti-surge power supply circuit can output a stable electrical signal, and damage of a surge phenomenon to the circuit is avoided, so that the power supply in the battery management system can stably supply power.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present utility model may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present utility model are achieved, and the present utility model is not limited herein.
The above embodiments do not limit the scope of the present utility model. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the scope of the present utility model.
Claims (10)
1. An anti-surge power supply circuit is characterized by being used for providing continuous and stable working voltage for a battery management system and comprising a surge protection module, a filtering module and a voltage conversion module;
The input end of the surge protection module is connected with a power supply, the surge protection module comprises a transient suppression unit, one end of the transient suppression unit is connected with the power supply, the other end of the transient suppression unit is connected with a GND end, and the transient suppression unit is used for conducting the surge protection module when the power supply voltage of the power supply exceeds a preset threshold value;
The filtering module is connected with the output end of the surge protection module and is used for filtering noise in the voltage provided by the power supply;
The input end of the voltage conversion module is connected with the filtering module, and the voltage conversion module is used for converting the voltage stabilized by the filtering module into the working voltage of the battery management system.
2. The anti-surge power supply circuit according to claim 1, wherein the surge protection module further comprises an overvoltage voltage division unit for sharing a voltage of an overvoltage portion when a supply voltage of the power supply exceeds a preset threshold, both ends of the overvoltage voltage division unit being connected in parallel with both ends of the transient suppression unit.
3. The anti-surge power supply circuit according to claim 2, wherein the transient suppression unit comprises a first diode, the overvoltage voltage division unit comprises a capacitor group formed by connecting at least two capacitors in series, two ends of the first diode are connected with two ends of the capacitor group, and the capacitor group is used for guiding an overvoltage part to an EARTH end for consumption when the supply voltage of the power supply exceeds a preset threshold value.
4. The anti-surge power supply circuit according to claim 3, wherein the capacitor group includes a first capacitor, a second capacitor, a third capacitor, and a fourth capacitor, the first capacitor, the second capacitor, the third capacitor, and the fourth capacitor are connected in series, the first capacitor is connected to the power supply, the fourth capacitor is connected to the GND terminal, and a common connection point of the second capacitor and the third capacitor is connected to the EARTH terminal.
5. The anti-surge power supply circuit according to claim 2, wherein a protection module is arranged between the transient suppression unit and the overvoltage voltage division unit, one end of the protection module is connected with one end of the transient suppression unit, and the other end of the protection module is connected with one end of the overvoltage voltage division unit and the power supply.
6. The anti-surge power supply circuit according to claim 1, wherein the filter module comprises a first filter unit, a second filter unit, and a third filter unit, and the first filter unit, the second filter unit, and the third filter unit are sequentially connected;
The first filtering unit comprises any one of an LC filtering circuit, an inductance filtering circuit or a capacitance filtering circuit;
The second filtering unit comprises any one of an LC filtering circuit, an inductance filtering circuit or a capacitance filtering circuit;
the third filtering unit comprises any one of an LC filtering circuit, an inductance filtering circuit or a capacitance filtering circuit.
7. The anti-surge power supply circuit according to claim 1, wherein a unidirectional conduction module is arranged between the surge protection module and the filtering module, an input end of the unidirectional conduction module is connected with one end of the transient suppression unit and the power supply, an output end of the unidirectional conduction module is connected with the filtering module, and the unidirectional conduction module is used for unidirectional transmission of current.
8. The anti-surge power supply circuit according to claim 1, wherein the voltage conversion module comprises a buck converter and peripheral circuitry;
The input end of the buck converter is connected with the filtering module and is used for converting the voltage output by the filtering module into the working voltage of the battery management system;
The input end of the peripheral circuit is connected with the output end of the buck converter and is used for filtering noise in the voltage output by the buck converter.
9. The anti-surge power supply circuit according to claim 8, wherein the peripheral circuit comprises a filter unit, the filter unit comprises a first inductor, a second diode and a fifth capacitor, a first end of the first inductor is connected to a first end of the second diode, a first end of the fifth capacitor and an output end of the buck converter, a second end of the first inductor is connected to an output end of the voltage conversion module, a second end of the second diode is grounded, and a second end of the fifth capacitor is connected to the buck converter.
10. A battery management system comprising the anti-surge power supply circuit of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323341254.3U CN221552829U (en) | 2023-12-08 | 2023-12-08 | Surge-proof power supply circuit and battery management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323341254.3U CN221552829U (en) | 2023-12-08 | 2023-12-08 | Surge-proof power supply circuit and battery management system |
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| CN221552829U true CN221552829U (en) | 2024-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323341254.3U Active CN221552829U (en) | 2023-12-08 | 2023-12-08 | Surge-proof power supply circuit and battery management system |
Country Status (1)
| Country | Link |
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| CN (1) | CN221552829U (en) |
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2023
- 2023-12-08 CN CN202323341254.3U patent/CN221552829U/en active Active
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