Power supply circuit of power battery pack management system

Abstract

The invention provides a power supply circuit of a power battery pack management system. The power supply circuit comprises two paths of power supply input, three paths of control signal input, one path of power supply output, three paths of load power supply circuits, wherein the two paths of power supply input are serially connected to a reverse connection prevention circuit respectively and then connected onto an emitting electrode of a PNP triode Q1 mutually, the three paths of control signal input are serially connected to the reverse connection prevention circuit respectively and then connected onto a base electrode of an NPN triode Q2 mutually, and an emitting electrode of the NPN triode Q2 is grounded; a collector electrode of the NPN triode Q2 is connected with a base electrode of the PNP triode Q1; a collector electrode of the PNP triode Q1 is connected to the power supply output; and the power supply output is connected to the three paths of load power supply circuits respectively. According to the power supply circuit of the power battery pack management system provided by the invention, power supply management can be supplied for the system reliably, and safe electrification control of the system and low power consumption control of the system are realized through control of power supply logic timing sequence.

Description

technical field [0001] The invention relates to a power supply circuit, in particular to a power supply circuit for a power battery pack management system. Background technique [0002] In the new energy vehicle power battery pack management system, a reliable power circuit has become the key to the performance of the entire system. The design of a reliable and safe power circuit generally requires full consideration of the following factors: [0003] 1. Fully evaluate the power supply load of the power battery pack management system: [0004] When designing the power supply circuit of the power battery pack management system, it is necessary to start from the concept of the system, strictly analyze the electrical range of the input and output of the power supply circuit, especially calculate the parameters such as current and voltage required by the load, and determine with a certain design margin. The design capacity of the power management circuit; [0005] 2. Fully eva...

AI Technical Summary

Problems solved by technology

[0010] In the power system circuit, damage to the power circuit due to misoperation such as miswiring and short circuit abounds. The reason is that the circuit of the power system is not equipped with anti-reverse connection measures. Devices are not working properly, resulting in heat damage, integrated devices cause breakdown due to sinking current, and electrolytic capacitors will explode and leak when serious, causing great damage to the system. connect circuit

[0011] To sum up, the design of the power circuit must fully demonstrate its feasibility in order to be safe and reliable. In the power circuits of some power battery pack management systems seen in the market, they often only meet the requirements of the power system under specific conditions. , and did not evaluate the characteristics of the power circuit from the aspects of load, power consumption, and anti-reverse connection. When the redundancy of the power circuit design is too large, it often leads to the phenomenon of "big cows pulling small carts", resulting in waste of resources and a decrease in device costs. Increase, if the design margin is not enough, the safety and reliability of the system cannot be satisfied, when the device is aging or performance is reduced due to long-term work, there will be a risk of device failure

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