Electric vehicle charging management system, electric vehicle battery system, and automobile

Abstract

The application discloses a kind of electric vehicle charging management system, electric vehicle battery system and car, the auxiliary function current of charging pile output is used as the trigger wake-up signal of battery management system BMS in the application, and the auxiliary function current of charging pile output is not used as the power supply current of battery management system BMS, the good trigger effect brought by the unstable nature of auxiliary function current of charging pile output can be utilized, to wake up the battery management system BMS in dormant state, the connection and pairing operation of electric vehicle charging management system and charging pile can be accurately identified;On the other hand, the application can avoid the negative effects such as damage or abnormal operation of battery management system BMS caused by unstable auxiliary function current, avoid further triggering the problems such as unstable charging, charging failure or overcharging of electric vehicle power battery pack, improve the charging stability and reliability of electric vehicle.The application is widely used in the field of automobile technology.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobiles, and in particular to an electric vehicle charging management system, an electric vehicle battery system and an automobile. BACKGROUND

[0002] The current electric vehicle charging pile provides a high-voltage charging power supply port and a low-voltage auxiliary power supply port. The high-voltage charging power supply port provides a charging power supply for the power battery pack of the electric vehicle through a high voltage such as 750V, and the low-voltage auxiliary power supply port can output a low-voltage voltage such as 12V or 24V to supply power to the vehicle-mounted controllers, vehicle-mounted entertainment systems, vehicle-mounted air conditioners and other vehicle-mounted electrical appliances of the electric vehicle.

[0003] One of the current situations of the charging pile technology is that, under the limitations of technology and cost and other factors, the manufacturers of the charging pile generally only focus on the circuits related to the high-voltage charging power supply port, and there are problems such as non-standard circuit design and poor material quality in the circuits related to the low-voltage auxiliary power supply port, which leads to problems such as unstable output voltage of the low-voltage auxiliary power supply port, unstable operation of the vehicle-mounted electrical appliances, and damage or abnormal operation of sensitive components such as MCUs and sensors in the battery management system, further causing problems such as unstable charging, charging failure or overcharging of the power battery pack of the electric vehicle. SUMMARY

[0004] In view of the technical problems that the current electric vehicle charging pile generally has poor power supply quality of the low-voltage auxiliary power supply port, leading to damage or abnormal operation of the vehicle-mounted electrical appliances on the electric vehicle, especially the battery management system, and further causing problems such as unstable charging, charging failure or overcharging of the power battery pack of the electric vehicle, the purpose of the present application is to provide an electric vehicle charging management system, an electric vehicle battery system and an automobile.

[0005] In one aspect, the present application embodiment includes an electric vehicle charging management system, comprising:

[0006] a first input end; the first input end is used to connect with a charging power supply end of a charging pile and receive a charging current output by the charging pile;

[0007] a second input end; the second input end is used to connect with an auxiliary function end of the charging pile and receive an auxiliary function current output by the charging pile;

[0008] a charging output end; the charging output end is used to connect with a power battery pack;

[0009] a first switch module; the first switch module connects the first input end and the charging output end;

[0010] The battery management system is configured to receive the auxiliary function current, wake up in response to the auxiliary function current, and control the first switch module to be turned on after being woken up, so as to charge the power battery pack with the charging current.

[0011] Further, the electric vehicle charging management system further comprises a second switch module.

[0012] The second switch module is connected to the second input end and the battery management system.

[0013] The battery management system is further configured to control the second switch module to be turned on before being woken up, and control the second switch module to be turned off after being woken up.

[0014] Further, the electric vehicle charging management system further comprises:

[0015] The battery management system is configured to receive the auxiliary function current, wake up in response to the auxiliary function current, and control the first switch module to be turned on after being woken up, so as to charge the power battery pack with the charging current.

[0016] Further, the electric vehicle charging management system further comprises:

[0017] The energy collection module is connected to the second input end, and is configured to receive the auxiliary function current and collect energy from the auxiliary function current.

[0018] Further, the electric vehicle charging management system further comprises a third switch module.

[0019] The third switch module is connected to the output end of the energy collection module and at least part of the battery monomers in the power battery pack.

[0020] The battery management system is further configured to detect an energy parameter generated by the energy collection module after being woken up, and control the third switch module to be turned on when the energy parameter meets a preset condition.

[0021] Further, the energy collection module is further configured to store the energy collected from the auxiliary function current.

[0022] The detection of the energy parameter generated by the energy collection module includes:

[0023] The total energy storage percentage of the energy collection module is detected as the energy parameter.

[0024] Further, the electric vehicle charging management system further comprises a fourth switch module.

[0025] The fourth switch module is connected to the output end of the energy collection module and the power supply end of the battery management system.

[0026] The battery management system is further configured to control the fourth switch module to be turned on when the energy parameter meets a preset condition.

[0027] Further, the third switch module comprises one input end and a plurality of output ends.

[0028] The input end of the third switch module is connected with the output end of the energy collection module.

[0029] Each output end of the third switch module is connected with each battery cell in the power battery pack.

[0030] The battery management system is further configured to detect the state of charge of each battery cell, and according to the state of charge of each battery cell, control the input end of the third switch module to be turned on with a corresponding number of output ends of the third switch module and turned off with other output ends of the third switch module.

[0031] In another aspect, the embodiment of the application further comprises an electric vehicle battery system, which comprises a power battery pack and the electric vehicle charging management system in the embodiment.

[0032] In another aspect, the embodiment of the application further comprises an automobile, which is installed with the electric vehicle charging management system in the embodiment.

[0033] The electric vehicle charging management system in the embodiment uses the auxiliary function current output by the charging pile as the trigger wake-up signal of the battery management system BMS, but does not use the auxiliary function current output by the charging pile as the power supply current of the battery management system BMS, can utilize the good triggering effect caused by the unstable nature of the auxiliary function current output by the charging pile to wake up the battery management system BMS in the dormant state, and can accurately identify the connection and pairing operation of the electric vehicle charging management system and the charging pile. On the other hand, since the auxiliary function current output by the charging pile does not supply power to the battery management system BMS, a certain degree of isolation between the battery management system BMS and the auxiliary function end (A+, A- and the like) of the charging pile is achieved, which can avoid the negative effects of the instability of the auxiliary function current on the battery management system BMS, such as damage or abnormal operation, and further avoid the problems of unstable charging, charging failure or overcharging of the power battery pack of the electric vehicle, and improve the charging stability and reliability of the electric vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 A schematic diagram of the output port of the charging pile applicable to the electric vehicle charging management system in the embodiment;

[0035] Figure 2A first structure schematic diagram of the electric vehicle charging management system in the embodiment;

[0036] Figure 3 A second structure schematic diagram of the electric vehicle charging management system in the embodiment;

[0037] Figure 4 A third structure schematic diagram of the electric vehicle charging management system in the embodiment. DETAILED DESCRIPTION

[0038] In the embodiment, the electric vehicle charging management system can be applied to the electric vehicle which is adapted to the charging pile with the charging power supply end (generally outputting 750V high voltage current) and the auxiliary function end (generally outputting 12V or 24V low voltage current). Figure 1 The output port of a charging pile is shown, which includes DC+, DC-, A+, A-, S+, S-, CC1, CC2 and PE ports, and the functions and parameters of these ports are shown in Table 1.

[0039] Table 1

[0040]

[0041]

[0042] In Table 1, DC+ and DC- can output high voltage, large current and large power, which are used to provide charging power supply for the power battery pack on the electric vehicle, so in the embodiment, the charging power supply end of the charging pile can refer to DC+ and DC-.

[0043] In Table 1, the outputs of A+, A-, S+, S-, CC1 and CC2 have low voltage, small current and small power, etc. compared with DC+ and DC-, which are mainly used to realize power supply for the electric equipment (including the battery management system) on the electric vehicle and auxiliary functions such as signal transmission line, so in the embodiment, the auxiliary function end of the charging pile can refer to one or more groups of ports such as A+, A-, S+, S-, CC1 and CC2. For example, all the ports such as A+, A-, S+, S-, CC1 and CC2 can be collectively referred to as the auxiliary function end of the charging pile, or only the group of A+ and A- with relatively large output current can be referred to.

[0044] In the embodiment, the structure of the electric vehicle charging management system is shown in Figure 2 Figure 2 ​The electric vehicle charging management system comprises a first input end, a second input end, a charging output end, a first switch module, a battery management system, a second switch module, a storage battery module, an energy collection module, a third switch module and a fourth switch module. The basic functions of the electric vehicle charging management system can be realized through the first input end, the second input end, the charging output end, the first switch module and the battery management system. The advanced functions of the electric vehicle charging management system can be realized through the second switch module, the storage battery module, the energy collection module, the third switch module and the fourth switch module.

[0045] In the embodiment, a dedicated device with control and data processing functions can be used as the battery management system (BMS), or an electronic control unit installed on the vehicle can be used as the battery management system BMS. The battery management system BMS can be connected to the first input end, the second input end, the charging output end, the first switch module, the second switch module, the storage battery module, the energy collection module, the third switch module and the fourth switch module through a CAN bus.

[0046] Referring to Figure 2 When the electric vehicle charging management system is used, the first input end in the electric vehicle charging management system is connected to the charging power supply end (DC+ and DC-) of the charging pile, and the first input end receives the charging current output by the charging pile through the charging power supply end (DC+ and DC-). As shown in Table 1, the charging current can reach a voltage and current level of 750V and 80A; the second input end in the electric vehicle charging management system is connected to the auxiliary function end (A+ and A-, etc.) of the charging pile, and the second input end receives the auxiliary function current output by the charging pile through the auxiliary function end (A+ and A-, etc.). As shown in Table 1, the auxiliary function current has a voltage and current level of 30V and 20A.

[0047] Referring to Figure 2 The charging output end is connected to the power battery pack installed on the electric vehicle, and the first input end is connected to the charging output end through the first switch module. The first switch module can be made of IGBT or other devices, and the first switch module is controlled by the battery management system BMS and switches between the on state and the off state. When the first switch module is on, the charging current received by the first input end from the charging power supply end (DC+ and DC-) of the charging pile can be output to the power battery pack through the first switch module and the charging output end, thereby charging the power battery pack; when the first switch module is off, the charging current received by the first input end from the charging power supply end (DC+ and DC-) of the charging pile cannot reach the power battery pack, and the charging process of the power battery pack is suspended.

[0048] In this embodiment, before the battery management system BMS receives the auxiliary function current output from the auxiliary function end (A+, A-, etc.), the battery management system BMS is in a dormant state. In the dormant state, the battery management system BMS can not send a conduction signal to the first switch module, and the first switch module is in an off state.

[0049] When the second input end transmits the auxiliary function current to the battery management system BMS, the battery management system BMS is awakened under the trigger of the auxiliary function current, and the battery management system BMS exits the dormant state. After the battery management system BMS is awakened, the battery management system BMS sends a conduction signal to the first switch module, so that the first switch module is turned on, and the charging current received by the first input end from the charging power end (DC+ and DC-) of the charging pile can be output to the power battery pack through the first switch module and the charging output end, thereby charging the power battery pack.

[0050] In this embodiment, by using the electric vehicle charging management system shown in Figure 2 , the auxiliary function current output by the charging pile is used as the trigger awakening signal of the battery management system BMS, and the auxiliary function current output by the charging pile is not used as the power supply current of the battery management system BMS. The good triggering effect caused by the unstable nature (usually with frequent jump, rich harmonics, etc.) of the auxiliary function current output by the charging pile can be used to awaken the battery management system BMS in the dormant state, so as to accurately identify the connection and pairing operation of the electric vehicle charging management system and the charging pile. On the other hand, since the auxiliary function current output by the charging pile does not supply power to the battery management system BMS, a certain degree of isolation between the battery management system BMS and the auxiliary function end (A+, A-, etc.) of the charging pile is achieved, which can avoid the negative effects of unstable auxiliary function current on the battery management system BMS, such as damage or abnormal operation, and further avoid problems such as unstable charging, charging failure or overcharging of the power battery pack of the electric vehicle, thereby improving the charging stability and reliability of the electric vehicle.

[0051] In this embodiment, referring to Figure 3 , the electric vehicle charging management system further comprises a battery module and a second switch module.

[0052] The battery module is an independent battery module from the power battery pack of the electric vehicle, that is, the battery module is used as an independent power supply of the battery management system BMS, so that the battery management system BMS can work normally without relying on the power supply of the auxiliary function current of the charging pile, and a certain degree of isolation between the battery management system BMS and the auxiliary function end (A+, A-, etc.) of the charging pile is achieved.

[0053] Referring to Figure 3The second switch module is connected with the second input end and the battery management system. The second switch module can be made of IGBT or other devices. The second switch module is controlled by the battery management system BMS and switches between the on state and the off state. When the second switch module is on, the auxiliary function current received by the second input end from the auxiliary function end (A+, A-, etc.) of the charging pile can be transmitted to the battery management system BMS through the second switch module, so as to trigger the battery management system BMS to wake up. When the second switch module is off, the auxiliary function current received by the second input end from the auxiliary function end (A+, A-, etc.) of the charging pile cannot reach the battery management system BMS, so as to realize the isolation between the battery management system BMS and the auxiliary function end (A+, A-, etc.) of the charging pile.

[0054] In the embodiment, by setting the on and off levels of the second switch module, the battery management system can receive the auxiliary function current received by the second input end from the auxiliary function end (A+, A-, etc.) of the charging pile before the battery management system is woken up (without outputting a specific off level to the second switch module). After the battery management system is woken up, the battery management system BMS sends an off signal to the second switch module, so that the second switch module is disconnected, realizing the isolation between the battery management system BMS and the auxiliary function end (A+, A-, etc.) of the charging pile, and avoiding the damage of unstable auxiliary function current to the battery management system BMS.

[0055] In the embodiment, referring to Figure 4 , the electric vehicle charging management system further comprises an energy collection module, a third switch module and a fourth switch module.

[0056] In the embodiment, the energy collection module can be made of supercapacitors or chemical batteries. Referring to Figure 4 , the energy collection module is connected with the second input end directly or through the second switch module. In the case that the second switch module is on, the auxiliary function current received by the second input end from the auxiliary function end (A+, A-, etc.) of the charging pile is transmitted to the energy collection module. The energy collection module converts the energy in the auxiliary function current into electric field energy or chemical energy for storage through supercapacitors or chemical batteries, realizing the energy collection from the auxiliary function current.

[0057] Referring to Figure 4The third switch module is connected between the output of the energy collection module and at least some battery monomers in the power battery pack. The third switch module can be made of IGBT or other devices. The third switch module is controlled by the battery management system (BMS) and switches between the on state and the off state. When the third switch module is on, the electric field energy or chemical energy stored in the energy collection module is output in the form of current to the power battery pack, so as to charge the power battery pack by using the auxiliary function current.

[0058] Specifically, after being woken up, the battery management system (BMS) detects an energy parameter generated by the energy collection module, and controls the third switch module to be on when the energy parameter meets a preset condition. In this embodiment, the battery management system (BMS) can detect the output voltage of the energy collection module, and determine the total energy storage percentage of the energy stored in the energy collection module according to the voltage-total energy storage percentage curve, that is, the percentage of the energy generated by the auxiliary function current currently stored in the energy collection module in the maximum energy that can be stored in the energy collection module, as the energy parameter.

[0059] Before the battery management system (BMS) detects that the total energy storage percentage of the energy stored in the energy collection module reaches a threshold value (for example, 50%), the battery management system (BMS) sends an off signal to the third switch module, the third switch module is off, and the energy collection module continues to collect and store the energy of the auxiliary function current; when the battery management system (BMS) detects that the total energy storage percentage of the energy stored in the energy collection module reaches the threshold value, the battery management system (BMS) sends an on signal to the third switch module, the third switch module is on, and the energy collection module outputs a charging current to the power battery pack to charge the collected energy into the power battery pack.

[0060] By setting the energy collection module, the power of the auxiliary function current output by the auxiliary function terminals (A+, A-, etc.) can be used to charge the power battery pack of the electric vehicle, so as to fully utilize the hardware resources and charging performance of the charging pile. For example, when using a charging pile meeting the performance standard in Table 1, the three groups of auxiliary function terminals A+ and A-, S+ and S-, and CC1 and CC22A will generate a total power of 720W. Compared with the charging power of about 7kW of some electric vehicle slow charging standards, using the energy collection module to use the power output by the auxiliary function terminals of the charging pile can achieve about 10% improvement in charging power.

[0061] Reference Figure 4The power battery pack is composed of a plurality of battery monomers, each battery monomer can be in the form of an electric cell or a battery module. The third switch module includes an input end and a plurality of output ends, the input end of the third switch module is connected with the output end of the energy collection module, and each output end of the third switch module is connected with each battery monomer in the power battery pack. Each output end in the third switch module can be independently turned on or turned off between the input end. When one output end in the third switch module is turned on with the input end of the third switch module, the battery monomer connected with the output end is charged by the energy collection module; when one output end in the third switch module is turned off with the input end of the third switch module, the battery monomer connected with the output end is not charged by the energy collection module.

[0062] In the embodiment, the battery management system BMS detects the state of charge of each battery monomer, wherein the state of charge of one battery monomer represents the percentage of the maximum chargeable capacity of the battery monomer currently stored (or select the number of charge and discharge cycles, etc.). The battery management system BMS controls the input end of the third switch module to be turned on with the corresponding output ends of the third switch module according to the state of charge of each battery monomer, and controls the input end of the third switch module to be turned off with other output ends of the third switch module. Specifically, for any battery monomer, if the state of charge of the battery monomer is less than a threshold value (for example, 50%), the battery management system BMS controls the output end connected with the battery monomer in the third switch module to be turned on with the input end of the third switch module, so that the battery monomer is charged by the energy collection module; on the contrary, if the state of charge of the battery monomer reaches the threshold value, the battery management system BMS controls the output end connected with the battery monomer in the third switch module to be turned off with the input end of the third switch module, so that the battery monomer is not charged by the energy collection module.

[0063] By setting the third switch module, the specific battery monomer in the power battery pack can be charged, so that the state of charge and the charge and discharge cycle of each battery monomer in the power battery pack tend to be balanced, and the power battery pack can be maintained in a healthy state, thereby prolonging the service life of the power battery pack.

[0064] Reference Figure 4 The fourth switch module connects the output end of the energy collection module with the power supply end of the battery management system BMS. The fourth switch module can be made of IGBT and the like, and is controlled by the battery management system BMS to switch between the on state and the off state. When the fourth switch module is turned on, the electric field energy or chemical energy stored in the energy collection module is output in the form of current to the power supply end of the battery management system BMS, thereby supplying power to the battery management system BMS.

[0065] In the embodiment, when the battery management system BMS detects that the energy parameter of the energy collection module meets the preset condition, the fourth switch module is controlled to be turned on, so that the energy collected from the auxiliary function current is used by the energy collection module for power supply.

[0066] In the embodiment, the low-quality auxiliary function current output by the auxiliary function end (A+, A-, etc.) of the charging pile is filtered and optimized after energy collection and storage by the energy collection module, so as to have better stability and be used for power supply of the battery management system BMS, which is conducive to reducing the load of the battery module in the electric vehicle battery system and prolonging the service life of the electric vehicle battery system.

[0067] In the embodiment, the electric vehicle charging management system can be combined with the power battery pack to form an electric vehicle battery system, which is manufactured and used as a whole. The electric vehicle battery system has the effects of avoiding negative influences of unstable auxiliary function current on the battery management system BMS, avoiding further problems of unstable charging, charging failure or overcharging of the power battery pack of the electric vehicle, and improving the charging stability and reliability of the electric vehicle.

[0068] The electric vehicle battery system in the embodiment can be installed on the vehicle body of the automobile to be used as a whole. The obtained automobile as a whole has the effects of avoiding negative influences of unstable auxiliary function current on the battery management system BMS, avoiding further problems of unstable charging, charging failure or overcharging of the power battery pack of the electric vehicle, and improving the charging stability and reliability of the electric vehicle.

[0069] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. In addition, the up, down, left, right and the like used in the disclosure are only relative to the relative position relationship of the components of the disclosure in the drawings. In the disclosure, the singular forms "a", "an" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise. In addition, unless otherwise defined, all technical and scientific terms used in the embodiments have the same meanings as generally understood by those skilled in the art. The terms used in the embodiments are only used to describe the specific embodiments, and are not intended to limit the present application. The term "and / or" used in the embodiments includes any combination of one or more related listed items.

[0070] It should be understood that, although the terms first, second, third, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements should not be limited to these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present disclosure. The use of any and all examples, or exemplary language (e.g., "such as", "for instance", etc.), provided herein, is intended merely to better illuminate the present embodiments and does not pose a limitation on the scope of the present disclosure unless otherwise claimed.

[0071] It will be appreciated that embodiments of the present application can be realized by computer hardware, a combination of hardware and software, or by computer instructions stored on a non-transitory computer-readable storage medium. The methods can be implemented in a computer program, using standard programming techniques, including the configuration of non-transitory computer-readable storage media with a computer program, wherein the storage medium so configured with the computer program instructs the computer to operate in a specific and predefined manner according to the method described in the specific embodiments and the accompanying drawings. Each program can be implemented in a high-level procedural or object-oriented programming language to communicate with a computer system. However, the program can be implemented in assembly or machine language, if desired. In any case, the language can be a compiled or interpreted language. Moreover, the program can run on a specially programmed integrated circuit for this purpose.

[0072] Furthermore, the operations of the processes described in the present embodiments can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The processes described in the present embodiments (or variations and / or combinations thereof) can be implemented under the control of one or more computer systems configured with executable instructions (e.g., computer programs, one or more computer programs, or one or more applications), and can be implemented as code (e.g., executable instructions, one or more computer programs, or one or more applications) executing collectively on one or more processors, by hardware, or combinations thereof. A computer program includes a plurality of instructions executable by one or more processors.

[0073] Further, the methods can be implemented in any type of computing platform operably connected to the appropriate, including but not limited to a personal computer, mini-computer, mainframe, workstation, network or distributed computing environment, separate or integrated computer platform, or in communication with a charged particle tool or other imaging device, etc. Aspects of the present application can be implemented in machine readable code stored on a non-transitory storage medium or device, whether removable or integrated into a computing platform, such as a hard disk, optical read and / or write storage medium, RAM, ROM, etc., such that it is readable by a programmable computer and, when the storage medium or device is read by a computer, is used to configure and operate the computer to perform the processes described herein. In addition, the machine readable code, or portions thereof, can be transmitted over a wired or wireless network. When such media include instructions or programs implementing the above steps in conjunction with a microprocessor or other data processor, the present embodiments of the application include these and other different types of non-transitory computer-readable storage media. The present application also includes the computer itself when programmed according to the methods and techniques of the present application.

[0074] The computer program can be applied to input data to perform the functions of the present embodiments, thereby transforming the input data to generate output data that is stored to non-volatile memory. The output information can also be applied to one or more output devices, such as a display. In preferred embodiments of the present application, the transformed data represents a physical and tangible object, including a particular visual depiction of the physical and tangible object produced on a display.

[0075] The above merely preferred embodiments of the present application and are not intended to limit the present application thereto, as long as the same technical effects are achieved by the same means. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the present application. The technical solutions and / or embodiments of the present application can have various modifications and changes within the scope of the present application.

Claims

1. An electric vehicle charging management system, characterized by, The electric vehicle charging management system comprises: a first input end, configured to be connected with a charging power end of a charging pile and receive a charging current output by the charging pile; a second input end, configured to be connected with an auxiliary function end of the charging pile and receive an auxiliary function current output by the charging pile; a charging output end, configured to be connected with a power battery pack which is a battery module independent of a storage battery module; a first switch module, connecting the first input end and the charging output end; a battery management system, configured to receive the auxiliary function current, wake up by the auxiliary function current, and control the first switch module to be turned on after being woken up, so as to charge the charging current into the power battery pack; an energy collection module, an input end of which is connected with the second input end, the energy collection module being configured to receive the auxiliary function current, collect energy from the auxiliary function current, and charge the collected energy into the power battery pack; a third switch module, connecting an output end of the energy collection module and at least part of battery monomers in the power battery pack; the battery management system is further configured to detect an energy parameter generated by the energy collection module after being woken up, control the third switch module to be turned on when the energy parameter meets a preset condition, and control the third switch module to be turned off when the energy parameter does not meet the preset condition.

2. The electric vehicle charge management system of claim 1, wherein, The electric vehicle charging management system further comprises a second switch module; the second switch module connects the second input end and the battery management system; the battery management system is further configured to control the second switch module to be turned on before being woken up and control the second switch module to be turned off after being woken up.

3. The electric vehicle charge management system of claim 1, wherein, The electric vehicle charging management system further comprises: a storage battery module, configured to supply power for the battery management system.

4. The electric vehicle charging management system according to claim 1, wherein: the energy collection module is further configured to store energy collected from the auxiliary function current; the detection of the energy parameter generated by the energy collection module comprises: detecting a total energy storage percentage of the energy collection module as the energy parameter.

5. The electric vehicle charging management system according to claim 1, wherein: the electric vehicle charging management system further comprises a fourth switch module; the fourth switch module connects an output end of the energy collection module and a power supply end of the battery management system; the battery management system is further configured to control the fourth switch module to be turned on when the energy parameter meets a preset condition.

6. The electric vehicle charging management system according to any one of claims 1-5, wherein: the third switch module comprises one input end and multiple output ends; the input end of the third switch module is connected with the output end of the energy collection module; each output end of the third switch module is connected with each battery monomer in the power battery pack. The battery management system is also used for detecting the power states of the battery monomers, and according to the power states, the input end of the third switch module is controlled to be conductive with the corresponding output ends of the third switch module and to be cut off with other output ends of the third switch module.

7. An electric vehicle battery system, characterized by, The electric vehicle battery system comprises a power battery pack and the electric vehicle charging management system according to any one of claims 1-6.

8. An automobile characterized by comprising: The automobile is provided with the electric vehicle battery system according to claim 7. The automobile is provided with the electric vehicle battery system according to claim 7.

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