Battery output optimization circuit, vehicle and battery output optimization method

Abstract

The invention relates to the technical field of vehicles, in particular to an output optimization circuit of a battery, a vehicle and an output optimization method of the battery, and the optimization circuit comprises a sampling circuit, a discharge loop and a control assembly. The sampling circuit is used for collecting a current battery signal and a current load voltage; the discharge loop comprises a charging state and a discharge state and is used for being in the charging state when receiving a power supply instruction and being in the discharge state when receiving a discharge instruction; the control assembly is connected with the sampling circuit and the discharge loop, and is used for receiving a current battery signal and a current load voltage, generating a power supply instruction when the current battery signal is a power supply signal, and generating a discharge instruction when the current battery signal is a power-off signal or the current load voltage is greater than a preset voltage. Therefore, the problems of high static power consumption, low discharge rate and the like of a traditional discharge method are solved, the accuracy and the response speed of the battery management system are effectively improved, and the electric quantity discharge effect is ensured.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a battery output optimization circuit, a vehicle, and a battery output optimization method. Background Art

[0002] As the core component of new energy vehicles, the continuous advancement of low-voltage batteries has provided strong support for the development of new energy vehicles. Compared with traditional lead-acid batteries, lithium-ion batteries have higher cycle life, smaller size and weight, higher charge and discharge efficiency, and environmental advantages. With the expansion of the new energy vehicle market, lithium-ion batteries will inevitably replace traditional lead-acid batteries.

[0003] In practical applications, low-voltage lithium-ion batteries are usually connected in parallel with capacitors to improve the transient discharge performance of the battery pack when used in vehicles, and to absorb surge overvoltage caused by the disconnection of the battery power supply to ensure driving reliability. However, in non-mounted applications, after the lithium battery is powered off, there will be residual charge on its parallel capacitors, which may be discharged due to accidental contact, causing damage, or cause misjudgment when the system is restarted due to external voltage. Therefore, it is necessary to discharge the residual charge on the capacitor in time after the system is powered off.

[0004] In the related technology, the current lithium battery discharge circuit usually adopts the methods of directly adding parallel resistors to achieve discharge, triodes to achieve discharge, and single-chip microcomputers to achieve discharge. However, these traditional discharge methods have the problems of large static power consumption and slow discharge rate. In particular, the method of directly adding parallel resistors to achieve discharge will increase the load power consumption when the system is in standby mode, reduce the battery standby time when it is installed, and require manual operation after power off to activate the discharge circuit, which increases the complexity of operation and needs to be solved urgently. Summary of the invention

[0005] The present application provides a battery output optimization circuit, a vehicle, and a battery output optimization method to solve the problems of large static power consumption and slow discharge rate in traditional discharge methods, effectively improve the accuracy and response speed of the battery management system, and ensure the power discharge effect.

[0006] A first aspect of the present application provides an output optimization circuit for a battery, comprising:

[0007] A sampling circuit, used to collect the current battery signal and the current load voltage;

[0008] A discharge circuit, the discharge circuit comprising a charging state and a discharge state, for being in the charging state when receiving a power supply instruction, and being in the discharge state when receiving a discharge instruction;

[0009] A control component, wherein the control component is respectively connected to the sampling circuit and the discharge circuit, and is used to receive the current battery signal and the current load voltage, and generate the power supply instruction when the current battery signal is a power supply signal, and generate the discharge instruction when the current battery signal is a power-off signal or the current load voltage is greater than a preset voltage.

[0010] According to one embodiment of the present application, the discharge circuit includes:

[0011] a signal generating unit, wherein the signal generating unit generates a first level signal when receiving the power supply instruction, and generates a second level signal when receiving the discharge instruction, wherein the first level signal is opposite to the second level signal;

[0012] A discharge unit, wherein the discharge unit includes a switch element and a discharge resistor, the switch element includes a fixed contact, a normally open contact and a normally closed contact, wherein the normally closed contact is connected to a current load, the normally open contact is connected to an output end of the signal generating unit, and the normally closed contact is connected to a ground node through the discharge resistor, and when the signal generating unit generates the first level signal, the fixed contact and the normally open contact are in a connected state to charge the current load; when the signal generating unit generates the second level signal, the fixed contact and the normally closed contact are in a connected state to discharge the current load through the discharge resistor.

[0013] According to one embodiment of the present application, the signal generating unit includes:

[0014] A transistor, wherein the base of the transistor is connected to the positive electrode of the battery, the collector of the transistor is connected to the base of the transistor, and the emitter of the transistor is respectively connected to the negative electrode of the battery and the ground node, and the transistor outputs a third level signal when the current battery signal is the power supply signal, and outputs a fourth level signal when the current battery signal is the power-off signal or the current load voltage is greater than the preset voltage, wherein the third level signal is opposite to the fourth level signal;

[0015] a first resistor, one end of which is connected to the positive electrode of the battery;

[0016] a second resistor, one end of the second resistor being connected to the other end of the first resistor and the positive electrode of the switch element respectively, and the other end of the second resistor being connected to the negative electrode of the switch element;

[0017] A MOS tube, wherein the gate of the MOS tube is connected to the emitter of the triode, the source of the MOS tube is connected to the ground node, the drain of the MOS tube is connected to the other end of the second resistor, and when the triode outputs the third level signal, the MOS tube is in a conducting state, so that the signal generating unit generates the first level signal; when the triode outputs the fourth level signal, the MOS tube is in a disconnected state, so that the signal generating unit generates the second level signal.

[0018] According to one embodiment of the present application, the signal generating unit further includes:

[0019] a third resistor disposed between the base of the transistor and the positive electrode of the battery;

[0020] A fourth resistor is arranged between the emitter of the transistor and the negative electrode of the battery.

[0021] According to one embodiment of the present application, the signal generating unit further includes:

[0022] a first diode, wherein an anode of the first diode is connected to a connection node between one end of the third resistor and the positive electrode of the battery, and a cathode of the first diode is connected to one end of the first resistor and the normally open contact respectively;

[0023] A second diode, wherein an anode of the second diode is connected to the other end of the second resistor, and a cathode of the second diode is connected to one end of the second resistor.

[0024] According to an embodiment of the present application, the resistance value of the discharge resistor is determined by the current discharge rate, the transistor is an NPN transistor, and the MOS transistor is an N-channel MOS transistor.

[0025] According to the output optimization circuit of the battery provided in the embodiment of the present application, the sampling circuit is used to collect the current battery signal and the current load voltage; the discharge circuit is used to be in a charging state when receiving a power supply instruction, and in a discharge state when receiving a discharge instruction; the control component is used to receive the current battery signal and the current load voltage, and generate a power supply instruction when the current battery signal is a power supply signal, and generate a discharge instruction when the current battery signal is a power-off signal or the current load voltage is greater than a preset voltage. In this way, the problems of large static power consumption and slow discharge rate in the traditional discharge method are solved, the accuracy and response speed of the battery management system are effectively improved, and the power discharge effect is guaranteed.

[0026] A second aspect of the present application provides a vehicle, comprising the battery output optimization circuit described in the above embodiment.

[0027] According to the vehicle of the embodiment of the present application, the output optimization circuit of the above-mentioned battery solves the problems of large static power consumption and slow discharge rate in the traditional discharge method, effectively improves the accuracy and response speed of the battery management system, and ensures the power discharge effect.

[0028] A third aspect of the present application provides a method for optimizing the output of a battery, using the above-mentioned output optimization circuit of the battery, wherein the method comprises the following steps:

[0029] Collect current battery signal and current load voltage;

[0030] Determine whether the current battery signal is the power-off signal, and whether the current load voltage is greater than a preset voltage;

[0031] If the current battery signal is the power-off signal, or the current load voltage is greater than the preset voltage, the discharge instruction is generated so that the discharge circuit performs a discharge action based on the discharge instruction.

[0032] According to one embodiment of the present application, after collecting the current battery signal and the current load voltage, the method further includes:

[0033] Determining whether the current battery signal is a power supply signal;

[0034] If the current battery signal is the power supply signal, the power supply instruction is generated, so that the discharge circuit performs a power supply action based on the power supply instruction.

[0035] According to one embodiment of the present application, the battery output optimization method further includes:

[0036] Get the current discharge demand;

[0037] A current discharge rate is determined according to the current discharge demand, and a resistance value of the discharge resistor is determined according to the current discharge rate.

[0038] According to the output optimization method provided by the embodiment of the present application, the sampling circuit is used to collect the current battery signal and the current load voltage; the discharge circuit is used to be in a charging state when receiving a power supply instruction, and in a discharge state when receiving a discharge instruction; the control component is used to receive the current battery signal and the current load voltage, and generate a power supply instruction when the current battery signal is a power supply signal, and generate a discharge instruction when the current battery signal is a power-off signal or the current load voltage is greater than a preset voltage. In this way, the problems of large static power consumption and slow discharge rate in the traditional discharge method are solved, the accuracy and response speed of the battery management system are effectively improved, and the power discharge effect is guaranteed.

[0039] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0041] Figure 1 A block diagram of an output optimization circuit of a battery provided according to an embodiment of the present application;

[0042] Figure 2 A schematic diagram of a battery output optimization circuit according to an embodiment of the present application;

[0043] Figure 3 A schematic diagram of signal changes during the power-on and power-off process of a battery according to an embodiment of the present application;

[0044] Figure 4 A schematic diagram of signal changes during the power-on and power-off process of a battery according to an embodiment of the present application;

[0045] Figure 5 Schematic diagram of a flow chart of a method for optimizing battery output according to an embodiment of the present application. DETAILED DESCRIPTION

[0046] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0047] The following describes the output optimization circuit of the battery, the vehicle and the output optimization method of the battery in the embodiment of the present application with reference to the accompanying drawings. In view of the problems of large static power consumption and slow discharge rate mentioned in the above background technology, the present application provides a battery output optimization circuit, which solves the problems of large static power consumption and slow discharge rate in the traditional discharge method. The electric energy accumulated in the external parallel capacitor is discharged in time through the discharge circuit to ensure the safety of the battery output, and the battery power-off self-activation capacitor discharge circuit is realized through the control circuit to avoid the influence of external charge on the system startup and ensure the reliability of the vehicle startup.

[0048] Specifically, Figure 1 A block diagram of a battery output optimization circuit provided in an embodiment of the present application.

[0049] like Figure 1As shown, the battery output optimization circuit device 10 includes: a sampling circuit 100 , a discharge circuit 200 and a control component 300 .

[0050] Among them, the sampling circuit 100 is used to collect the current battery signal and the current load voltage; the discharge circuit 200 includes a charging state and a discharge state, and is in a charging state when a power supply instruction is received, and is in a discharge state when a discharge instruction is received; the control component 300 is respectively connected to the sampling circuit 100 and the discharge circuit 200, and is used to receive the current battery signal and the current load voltage, and generate a power supply instruction when the current battery signal is a power supply signal, and generate a discharge instruction when the current battery signal is a power-off signal or the current load voltage is greater than a preset voltage.

[0051] The preset voltage may be a voltage preset by a person skilled in the art and is not specifically limited here.

[0052] Specifically, the control component 300 and the sampling circuit 100 are control units, that is, the microcontroller MCU and the voltage sampling circuit 100 constitute the control circuit part, and the voltage signal between the battery poles is obtained, so as to realize the precise control of the discharge circuit, and the discharge circuit 200 is the execution unit. The sampling circuit 100 of the embodiment of the present application is connected in parallel with the current load, wherein the current load is a supercapacitor group, and the sampling circuit 100 is used to collect the current battery signal and the current load voltage, and transmit the collected current battery signal and the current load voltage to the control component 300.

[0053] Specifically, when the battery is in the power-on state, since the battery is supplying power, the sampling circuit 100 will collect a higher load voltage and battery signal, and transmit the collected load voltage and battery signal to the microcontroller MCU, and the microcontroller MCU processes the received load voltage and battery signal according to the preset algorithm and control logic, thereby realizing the control of activation or dormancy of the discharge circuit 200. When the battery is in the power-off state, since the battery is no longer supplying power, the voltage at the output end of the battery should theoretically drop to zero or close to zero. However, due to the presence of the supercapacitor group, a certain voltage may remain between the poles, and the sampling circuit can detect the residual voltage and transmit it to the microcontroller MCU as a battery signal. In addition, when the battery is in the power-off state, the sampling circuit will also detect a lower load voltage and transmit the detected load voltage to the microcontroller MCU. The microcontroller MCU activates the capacitor discharge circuit as needed to prevent the residual voltage of the capacitor from affecting the normal startup of the system.

[0054] The discharge circuit 200 needs to ensure that it can switch quickly and accurately in different states to protect the battery and the system. Specifically, the discharge circuit 200 is in a charging state when receiving a power supply instruction, and is in a discharge state when receiving a discharge instruction. The core component of the control component 300 can be a microcontroller (MCU), which is used to receive the battery signal and the load voltage signal from the sampling circuit 100, and process the load voltage and battery current signal, and judge the current battery state and load state through the built-in algorithm. When the control component 300 detects that the current battery signal is a power supply signal, a power supply instruction is generated. When the control component 300 detects that the current battery signal is a power-off signal, or the current load voltage is greater than the preset voltage, a discharge instruction is generated, thereby realizing the control of the dormancy and activation of the discharge circuit 200.

[0055] Therefore, the embodiment of the present application realizes automatic activation of the discharge circuit through the control and execution circuit, and at the same time combines the sampling signal for processing to ensure the power discharge effect.

[0056] Further, in some embodiments, the discharge circuit 200 includes: a signal generating unit and a discharge unit. The signal generating unit generates a first level signal when receiving a power supply instruction, and generates a second level signal when receiving a discharge instruction, wherein the first level signal is opposite to the second level signal; the discharge unit includes a switch K1 and a discharge resistor R, the switch K1 includes a fixed contact, a normally open contact 1 and a normally closed contact 2, wherein the normally closed contact 2 is connected to the current load C, the normally open contact 1 is connected to the output end of the signal generating unit, and the normally closed contact 2 is connected to the ground node through the discharge resistor R, when the signal generating unit generates a first level signal, the fixed contact and the normally open contact 1 are in a connected state, and the current load C is charged; when the signal generating unit generates a second level signal, the fixed contact and the normally closed contact 2 are in a connected state, and the current load C is discharged through the discharge resistor R.

[0057] The first level signal may be a high level signal, and the second level signal may be a low level signal. The resistance value of the discharge resistor R is determined by the current discharge rate.

[0058] Specifically, when the signal generating unit receives a power supply instruction, it generates a first level signal, and controls the fixed contact of the switch element K1 and the normally open contact 1 to be in a connected state through the first level signal. At this time, the current flows into the current load C through the normally open contact 1 to charge the current load C.

[0059] In addition, when the signal generating unit receives the discharge instruction, it generates a second level signal, and controls the fixed contact of the switch element K1 and the normally closed contact 2 to be in a connected state through the second level signal. At this time, the load C is grounded through the discharge resistor R, so that the load C is discharged.

[0060] Further, in some embodiments, the signal generating unit includes: a transistor Q1, the base of the transistor Q1 is connected to the positive electrode of the battery, the collector of the transistor Q1 is connected to the base of the transistor Q1, the emitter of the transistor Q1 is respectively connected to the negative electrode of the battery and the ground node, the transistor Q1 outputs a third level signal when the current battery signal is a power supply signal, and the transistor Q1 outputs a fourth level signal when the current battery signal is a power-off signal or the current load voltage is greater than a preset voltage, wherein the third level signal and the fourth level signal are opposite; a first resistor R1, one end of the first resistor R1 is connected to the positive electrode of the battery; a second resistor R2, One end of the second resistor R2 is respectively connected to the other end of the first resistor R1 and the positive electrode of the switch element, and the other end of the second resistor R2 is connected to the negative electrode of the switch element; MOS transistor Q2, the gate of the MOS transistor Q2 is connected to the emitter of the triode Q1, the source of the MOS transistor Q2 is connected to the ground node, and the drain of the MOS transistor Q2 is connected to the other end of the second resistor R2. When the triode Q1 outputs the third level signal, the MOS transistor Q2 is in a conducting state, so that the signal generating unit generates the first level signal; when the triode Q1 outputs the fourth level signal, the MOS transistor Q2 is in a disconnected state, so that the signal generating unit generates the second level signal.

[0061] The third level signal may be a high level signal, and the fourth level signal may be a low level signal.

[0062] Optionally, the transistor Q1 may be an NPN transistor Q1 , and the MOS transistor Q2 may be an N-channel MOS transistor Q2 , which is not specifically limited herein.

[0063] Specifically, when the battery signal is a power supply signal, the transistor Q1 outputs a third level signal, and the MOS tube Q2 is controlled to be in an on state through the third level signal, so that the first resistor R1 and the second resistor R2 are connected to the loop, and then the signal generating unit generates a first level signal. At this time, there is a voltage drop at both ends of the switch element K1 due to the second resistor R2, and then the fixed contact and the normally open contact 1 are in a connected state, and the current load C is connected to both ends of the battery to start charging.

[0064] When the battery signal is a power-off signal or the load voltage is greater than the preset voltage, the transistor Q1 outputs a fourth level signal, and controls the MOS tube Q2 to be in a disconnected state by outputting the fourth level signal, so that the signal generating unit generates a second level signal. At this time, the voltage difference across the switch element K1 is lower than the turn-on voltage, and the fixed contact and the normally closed contact 2 are in a connected state, so that the overvoltage of the system and the supercapacitor group can be discharged through the discharge resistor R.

[0065] Furthermore, in some embodiments, the signal generating unit further includes: a third resistor R3 disposed between the base of the transistor Q1 and the positive electrode of the battery; and a fourth resistor R4 disposed between the emitter of the transistor Q1 and the negative electrode of the battery.

[0066] Specifically, the third resistor R3 is arranged between the base of the transistor Q1 and the positive electrode of the battery, which can limit the base current and protect the transistor from damage. In addition, in order to ensure the low static power consumption requirement of the whole vehicle, the fourth resistor R4 arranged between the emitter of the transistor Q1 and the negative electrode of the battery can be selected as a resistor with a larger resistance as much as possible.

[0067] Furthermore, in some embodiments, the signal generating unit also includes: a first diode D1, an anode of the first diode D1 is connected to a connection node between one end of the third resistor R3 and the positive electrode of the battery, and a cathode of the first diode D1 is respectively connected to one end of the first resistor R1 and the normally open contact 1; a second diode D2, an anode of the second diode D2 is connected to the other end of the second resistor R2, and a cathode of the second diode D2 is connected to one end of the second resistor R2.

[0068] Therefore, the embodiment of the present application uses the transistor Q1, the MOS tube Q2 and the switch element K1 to activate the discharge circuit 200, and uses a microcontroller for control, thereby avoiding the direct connection between the discharge resistor R and the battery, thereby reducing the standby load power consumption when the lithium battery is used.

[0069] For example, the output optimization circuit of the battery in the embodiment of the present application can be as follows: Figure 2 As shown, in order to facilitate those skilled in the art to more clearly and intuitively understand the structure and working principle of the output optimization circuit of the battery in the embodiment of the present application, the following is combined with Figure 2 Provide detailed explanation.

[0070] like Figure 2 As shown, one end of the third resistor R3 is connected to the positive electrode of the battery, the transistor Q1 is used to control the conduction state of the MOS tube Q2, the base of the transistor Q1 is connected to the third resistor R3, and the emitter of the transistor Q1 is connected to the fourth resistor R4. In order to ensure the low static power consumption requirement of the whole vehicle, the resistance value of the fourth resistor R4 must be reasonably selected to ensure that its resistance value is large enough, so that when the circuit is in a static state, the current passing through the resistor is reduced to a minimum, thereby minimizing the static power consumption of the entire system.

[0071] Further, the anode of the first diode D1 is connected to a connection node between one end of the third resistor R3 and the positive electrode of the battery, the first resistor R1 is connected to the first diode D1, the second resistor R2 is connected to the first resistor R1, the MOS tube Q2 is used to control the working state of the switch element K1, the gate of the MOS tube Q2 is connected to the connection node between the triode Q1 and the fourth resistor R4, the source of the MOS tube Q2 is connected to the other end of the fourth resistor R4, the drain of the MOS tube Q2 is connected to the second resistor R2, the second diode D2 is connected in parallel with the second resistor R2, the switch element K1 is used to switch the charging and discharging states, and the switch The positive electrode of the switch element K1 is connected to one end of the second resistor R2, the negative electrode of the switch element K1 is connected to the other end of the second resistor R2, the fixed contact of the switch element K1 is connected to one end of the sampling circuit 100, the normally open contact 1 of the switch element K1 is connected to the connection node between the cathode of the first diode D1 and one end of the first resistor R1, the discharge resistor R is used to discharge the overvoltage in the capacitor group, one end of the discharge resistor R is connected to the normally closed contact 2 of the switch element K1, and the other end of the discharge resistor R is respectively connected to the source of the MOS tube Q2 and the other end of the sampling circuit 100. In addition, the resistance value of the discharge resistor R is determined by the current discharge rate.

[0072] The contact state of the switch element K1 depends on the voltage across it. For example, when the voltage across the switch element K1 is 0, the normally closed contact 2 is closed; when the voltage across the relay is a preset voltage, the normally open contact 1 is closed.

[0073] Furthermore, if Figure 3 As shown, when the low-voltage lithium battery is powered on, the control component 300 detects that the current battery signal is a power supply signal, and generates a power supply instruction. The power supply instruction sends a high-level signal to drive the base of the transistor Q1 in the discharge circuit 200 to switch to a high level, so that the transistor Q1 is in a conducting state, and then the gate potential of the MOS tube Q2 is pulled high, and the drain-source of the MOS tube Q2 is turned on, so that the first resistor R1 and the second resistor R2 are connected to the discharge circuit 200. At this time, as shown in FIG. Figure 4 As shown, there is a voltage drop across the switch element K1 due to the second resistor R2, and then the contact of the switch element K1 is switched to the normally open contact 1, connecting the supercapacitor group to the two ends of the battery to start charging.

[0074] Furthermore, if Figure 3As shown, when the external power supply is disconnected, or the capacitor bank is overcharged, that is, when the control component 300 detects that the current battery signal is a power-off signal, or the current load voltage is greater than the preset voltage, a discharge instruction is generated, and the base of the transistor Q1 is controlled to lose power through the discharge instruction, and the base current of the transistor Q1 stops flowing, resulting in the disconnection of the path between the collector and the emitter of the transistor Q1, so that the transistor Q1 is turned off. Since the transistor Q1 is no longer turned on, the gate potential of the MOS tube Q2 is pulled up, and then the drain potential of the MOS tube Q2 is also pulled up. At this time, as shown in FIG. Figure 4 As shown, the voltage difference across the switch K1 is lower than the conduction voltage, and the contact of the switch K1 switches back to the normally closed contact 2, so that the overvoltage of the system and the supercapacitor group can be discharged through the discharge resistor R. In addition, the embodiment of the present application also adjusts the discharge rate by adjusting the size of the discharge resistor R. The smaller the resistance of the discharge resistor R, the faster the discharge.

[0075] Therefore, the embodiment of the present application can control the lithium battery to release the electric energy stored in the output pole parallel capacitor as soon as possible after power is turned off, avoiding the potential safety hazard caused by the residual charge of the capacitor in the case of output short circuit. In addition, in the case of rapid and repeated power on and off of the battery, the output optimization circuit of the battery proposed in the present application can ensure that the voltage between the poles can be quickly reset after the system is powered off, avoiding the residual voltage of the capacitor affecting the normal startup of the system.

[0076] According to the output optimization circuit of the battery proposed in the embodiment of the present application, the sampling circuit is used to collect the current battery signal and the current load voltage; the discharge circuit is used to be in a charging state when receiving a power supply instruction, and in a discharge state when receiving a discharge instruction; the control component is used to receive the current battery signal and the current load voltage, and generate a power supply instruction when the current battery signal is a power supply signal, and generate a discharge instruction when the current battery signal is a power-off signal or the current load voltage is greater than a preset voltage. In this way, the problems of large static power consumption and slow discharge rate in the traditional discharge method are solved, the accuracy and response speed of the battery management system are effectively improved, and the power discharge effect is guaranteed.

[0077] An embodiment of the present application also provides a vehicle, comprising the output optimization circuit of the battery of the above embodiment.

[0078] According to the vehicle of the embodiment of the present application, the output optimization circuit of the above-mentioned battery solves the problems of large static power consumption and slow discharge rate in the traditional discharge method, effectively improves the accuracy and response speed of the battery management system, and ensures the power discharge effect.

[0079] The following describes a battery output optimization method proposed according to an embodiment of the present application with reference to the accompanying drawings.

[0080] like Figure 5As shown, the battery output optimization method includes the following steps:

[0081] In step S501 , the current battery signal and the current load voltage are collected.

[0082] In step S502, it is determined whether the current battery signal is a power-off signal and whether the current load voltage is greater than a preset voltage.

[0083] In step S503, if the current battery signal is a power-off signal, or the current load voltage is greater than a preset voltage, a discharge instruction is generated, so that the discharge circuit performs a discharge action based on the discharge instruction.

[0084] Furthermore, in some embodiments, after collecting the current battery signal and the current load voltage, it also includes: determining whether the current battery signal is a power supply signal; if the current battery signal is a power supply signal, generating a power supply instruction so that the discharge circuit performs a power supply action based on the power supply instruction.

[0085] Furthermore, in some embodiments, the above-mentioned battery output optimization method further includes: obtaining a current discharge demand; determining a current discharge rate according to the current discharge demand, and determining a resistance value of the discharge resistor according to the current discharge rate.

[0086] It should be noted that the above explanation of the battery output optimization circuit embodiment is also applicable to the battery output optimization method of this embodiment, and will not be repeated here.

[0087] According to the battery output optimization method proposed in the embodiment of the present application, the sampling circuit is used to collect the current battery signal and the current load voltage; the discharge circuit is used to be in a charging state when receiving a power supply instruction, and in a discharge state when receiving a discharge instruction; the control component is used to receive the current battery signal and the current load voltage, and generate a power supply instruction when the current battery signal is a power supply signal, and generate a discharge instruction when the current battery signal is a power-off signal or the current load voltage is greater than a preset voltage. In this way, the problems of large static power consumption and slow discharge rate in the traditional discharge method are solved, the accuracy and response speed of the battery management system are effectively improved, and the power discharge effect is guaranteed.

[0088] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0089] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0090] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0091] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or N wirings (electronic devices), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0092] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0093] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0094] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0095] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A battery output optimization circuit, characterized in that: include: A sampling circuit, used to collect the current battery signal and the current load voltage; A discharge circuit, the discharge circuit comprising a charging state and a discharge state, for being in the charging state when receiving a power supply instruction, and being in the discharge state when receiving a discharge instruction; A control component, wherein the control component is respectively connected to the sampling circuit and the discharge circuit, and is used to receive the current battery signal and the current load voltage, and generate the power supply instruction when the current battery signal is a power supply signal, and generate the discharge instruction when the current battery signal is a power-off signal or the current load voltage is greater than a preset voltage.

2. The battery output optimization circuit according to claim 1, characterized in that: The discharge circuit comprises: a signal generating unit, wherein the signal generating unit generates a first level signal when receiving the power supply instruction, and generates a second level signal when receiving the discharge instruction, wherein the first level signal is opposite to the second level signal; A discharge unit, wherein the discharge unit includes a switch element and a discharge resistor, the switch element includes a fixed contact, a normally open contact and a normally closed contact, wherein the normally closed contact is connected to a current load, the normally open contact is connected to an output end of the signal generating unit, and the normally closed contact is connected to a ground node through the discharge resistor, and when the signal generating unit generates the first level signal, the fixed contact and the normally open contact are in a connected state to charge the current load; when the signal generating unit generates the second level signal, the fixed contact and the normally closed contact are in a connected state to discharge the current load through the discharge resistor.

3. The battery output optimization circuit according to claim 2, characterized in that: The signal generating unit comprises: A transistor, wherein the base of the transistor is connected to the positive electrode of the battery, the collector of the transistor is connected to the base of the transistor, and the emitter of the transistor is respectively connected to the negative electrode of the battery and the ground node, and the transistor outputs a third level signal when the current battery signal is the power supply signal, and outputs a fourth level signal when the current battery signal is the power-off signal or the current load voltage is greater than the preset voltage, wherein the third level signal is opposite to the fourth level signal; a first resistor, one end of which is connected to the positive electrode of the battery; a second resistor, one end of the second resistor being connected to the other end of the first resistor and the positive electrode of the switch element respectively, and the other end of the second resistor being connected to the negative electrode of the switch element; A MOS tube, wherein the gate of the MOS tube is connected to the emitter of the triode, the source of the MOS tube is connected to the ground node, the drain of the MOS tube is connected to the other end of the second resistor, and when the triode outputs the third level signal, the MOS tube is in a conducting state, so that the signal generating unit generates the first level signal; when the triode outputs the fourth level signal, the MOS tube is in a disconnected state, so that the signal generating unit generates the second level signal.

4. The battery output optimization circuit according to claim 3, characterized in that: The signal generating unit further includes: a third resistor disposed between the base of the transistor and the positive electrode of the battery; A fourth resistor is arranged between the emitter of the transistor and the negative electrode of the battery.

5. The battery output optimization circuit according to claim 4, characterized in that: The signal generating unit further includes: a first diode, wherein an anode of the first diode is connected to a connection node between one end of the third resistor and the positive electrode of the battery, and a cathode of the first diode is connected to one end of the first resistor and the normally open contact respectively; A second diode, wherein an anode of the second diode is connected to the other end of the second resistor, and a cathode of the second diode is connected to one end of the second resistor.

6. The battery output optimization circuit according to claim 3, characterized in that: The resistance value of the discharge resistor is determined by the current discharge rate, the transistor is an NPN transistor, and the MOS transistor is an N-channel MOS transistor.

7. A vehicle, characterized in that: include: An output optimization circuit for a battery as claimed in any one of claims 1 to 6.

8. A method for optimizing battery output, characterized in that: The output optimization circuit of the battery according to any one of claims 1 to 6 is used, wherein the method comprises the following steps: Collect current battery signal and current load voltage; Determine whether the current battery signal is the power-off signal, and whether the current load voltage is greater than a preset voltage; If the current battery signal is the power-off signal, or the current load voltage is greater than the preset voltage, the discharge instruction is generated so that the discharge circuit performs a discharge action based on the discharge instruction.

9. The battery output optimization method according to claim 8, characterized in that: After collecting the current battery signal and the current load voltage, the method further includes: Determining whether the current battery signal is a power supply signal; If the current battery signal is the power supply signal, the power supply instruction is generated, so that the discharge circuit performs a power supply action based on the power supply instruction.

10. The battery output optimization method according to claim 8, characterized in that: Also includes: Get the current discharge demand; A current discharge rate is determined according to the current discharge demand, and a resistance value of the discharge resistor is determined according to the current discharge rate.

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