Battery wake-up circuit, battery assembly and electric vehicle

Abstract

The utility model provides a battery wake-up circuit, a battery assembly and an electric vehicle, and relates to the technical field of battery management, the circuit comprises a power supply module, a vibration sensing module, a control module and a driving module; the power supply module is electrically connected with the vibration sensing module, the control module and the driving module respectively; the vibration sensing module is used for generating a disconnection signal and / or a connection signal based on a vibration operation of a user and outputting a to-be-awakened signal; the control module is used for outputting an awakening signal based on the vibration intensity corresponding to the to-be-awakened signal; the driving module is electrically connected with the control module, the driving module is used for controlling the battery to be switched to a wake-up state according to the wake-up signal, the negative electrode of the battery is connected with the output end of the driving module, and the negative electrode of the battery is conducted with an external output negative electrode in the wake-up state. Therefore, the problem that in the prior art, the battery needs to be awakened to achieve ignition when the battery is not used for a long time is solved, operation is easy, the problem that the battery is difficult to awaken is solved, and the battery awakening efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery management, and more specifically, to a battery wake-up circuit, a battery assembly and an electric vehicle. Background Art

[0002] In the prior art, for a vehicle, such as a motorcycle, the use of a storage battery includes two working conditions: Condition 1: At the moment of starting, the battery provides a large current in a short time to start the engine; Condition 2: When not started, a small current is used to supply power to the dashboard and other accessory devices for a long time. If Condition 1 is to be successfully executed, it is necessary to ensure that the battery has sufficient power. To achieve this, it is necessary to limit the time for the battery to supply power with a small current in Condition 2.

[0003] In this regard, the method of cutting off the output current after the vehicle has been stationary for several days is adopted to ensure the battery power. However, in the case of current cut-off, when the vehicle is used again, the battery needs to be started. Generally, an external power supply is used to wake up the battery, which greatly affects the battery wake-up efficiency and adds extra difficulties for users to use the vehicle, resulting in a poor user experience.

[0004] Therefore, there is an urgent need for a new technical solution to solve the above technical problems. Summary of the Utility Model

[0005] A series of simplified concepts are introduced in the Summary of the Utility Model section, which will be further described in detail in the Detailed Implementation section. The Summary of the Utility Model section of the present utility model does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0006] In a first aspect, the present utility model provides a battery wake-up circuit, including:

[0007] A power supply module, a vibration sensing module, a control module and a driving module;

[0008] The power supply module is electrically connected to the vibration sensing module, the control module and the driving module respectively;

[0009] The vibration sensing module is configured to generate a disconnection signal and / or a conduction signal based on the user's vibration operation and output a signal to be woken up;

[0010] The control module is configured to output a wake-up signal based on the intensity of the vibration corresponding to the signal to be woken up;

[0011] The driving module is electrically connected to the control module. The driving module is configured to control the battery to switch to the wake-up state according to the wake-up signal. Wherein, the negative electrode of the battery is connected to the output end of the driving module, and in the wake-up state, the negative electrode of the battery is electrically connected to the external output negative electrode.

[0012] Optionally, the vibration sensing module includes:

[0013] a vibration sensing switch and a first field effect transistor;

[0014] Wherein, the first end of the vibration sensing switch is connected to the output end of the power supply module, the second end of the vibration sensing switch is connected to the gate of the first field effect transistor, the source of the first field effect transistor is grounded, and the drain of the first field effect transistor is connected to the input end of the control module.

[0015] Optionally, the drain of the first field effect transistor and the input end of the control module are both electrically connected to the first node, and the output end of the power supply module is electrically connected to the first node.

[0016] Optionally, a first resistor is connected between the output end of the power supply module and the first node.

[0017] Optionally, the second end of the vibration sensing switch is connected to the gate of the first field effect transistor via a second resistor.

[0018] Optionally, the second end of the vibration sensing switch is connected to the gate of the first field effect transistor via a filter circuit, wherein the filter circuit includes a third resistor and a first capacitor connected in parallel, the first end of the filter circuit is respectively connected to the second end of the vibration sensing switch and the gate of the first field effect transistor, and the second end of the filter circuit is grounded.

[0019] Optionally, the drive module includes:

[0020] a switch circuit and a signal processing chip;

[0021] Wherein, the signal processing chip is used to control the switch circuit to conduct or cut off after obtaining the wake-up signal through the two-wire serial communication protocol with the control module. The first end of the switch circuit is connected to the negative electrode of the battery, and the second end of the switch circuit is connected to the external output negative electrode.

[0022] Optionally, the switch circuit includes multiple groups of symmetrically arranged field effect transistor circuits, and each field effect transistor circuit includes a second field effect transistor and a fourth resistor connected to the gate of the second field effect transistor.

[0023] In a second aspect, a battery assembly is further proposed, including:

[0024] the battery wake-up circuit as described above;

[0025] a battery body;

[0026] a battery housing, wherein the external output negative electrode is arranged on the outside of the battery housing.

[0027] In a third aspect, an electric vehicle is further proposed, including:

[0028] The battery assembly as described above.

[0029] According to the above technical solution, in response to the user's vibration operation, the vibration sensing module can generate and output a signal to be awakened to the control module. The control module can generate an awakening signal after comparing it with a pre-stored threshold value and transmit it to the driving module, so that the driving module can conduct the negative electrode of the battery to the external output negative electrode according to the awakening signal to achieve battery awakening. Thus, not only the problem of having to wake up the battery for ignition after long-term non-use in the prior art is solved, but also the operation is simple, the problem of difficult battery awakening is solved, the battery awakening efficiency is improved, and the user experience is also improved.

[0030] For the battery awakening circuit of the present utility model, other advantages, objectives and features of the present utility model will be partially reflected by the following description, and partially will also be understood by those skilled in the art through the research and practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of this specification. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0032] Figure 1 A schematic block diagram of a battery awakening circuit according to an embodiment of the present invention is shown;

[0033] Figure 2 A schematic diagram of a control module according to an embodiment of the present invention is shown;

[0034] Figure 3 A schematic circuit diagram of a vibration sensing module according to an embodiment of the present invention is shown;

[0035] Figure 4 A schematic circuit diagram of a driving module according to an embodiment of the present invention is shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] In the description and claims of this application and the above-mentioned drawings, the terms "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments described here can be implemented in an order other than that illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that comprises a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices. The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments.

[0037] According to a first aspect of the present application, a battery wake-up circuit is proposed. Figure 1 A schematic block diagram of a battery wake-up circuit 100 according to an embodiment of the present invention is shown. As Figure 1 shown, the circuit 100 may include a power supply module 110, a vibration sensing module 120, a control module 130, and a driving module 140.

[0038] The power supply module 110 may be electrically connected to the vibration sensing module 120, the control module 130, and the driving module 140 respectively. The vibration sensing module 120 is configured to generate a disconnection signal and / or a conduction signal based on the user's vibration operation and output a signal to be woken up. The control module 130 is configured to output a wake-up signal based on the intensity of the vibration corresponding to the signal to be woken up. The driving module 140 is electrically connected to the control module 130. The driving module 140 is configured to control the battery to switch to the wake-up state according to the wake-up signal. Wherein, the negative electrode of the battery is connected to the output end of the driving module, and the negative electrode of the battery is electrically connected to the external output negative electrode in the wake-up state.

[0039] See Figure 1, the power supply module 110 can supply power to the vibration sensing module 120, the control module 130, and the driving module 140 respectively. The input end of the power supply module 110 can be connected to the positive electrode of the battery, using the positive and negative electrodes of the battery as the power source. Among them, the negative electrode of the battery can be equivalently regarded as the ground terminal, and appropriate electronic components are used to filter, step down, etc. the power supply voltage, and finally output the desired voltage. Here, the circuit structure of the power supply module 110 is not limited, and any circuit structure that can output the desired voltage based on the battery voltage is within the protection scope of this application. In the embodiment of this application, the relevant description is made by taking the power supply module 110 as an example to output a 3.3V voltage, but 3.3V does not mean a limitation on the power supply voltage of each module. For the convenience of description and understanding, the battery and the battery wake-up circuit are installed on the motorcycle as an example for the following description. In fact, the battery and the battery wake-up circuit can be installed in any device or equipment that is expected to wake up the battery in the battery sleep state. Exemplarily, when the user expects to start the battery, a "vibration signal" can be input to the battery wake-up circuit by means of vibration. For example, the user shakes or rides the motorcycle. At this time, in response to the user's vibration operation, the vibration sensing module 120 can generate a disconnection signal and / or a conduction signal. It should be noted that since the "vibration operation" can be the turbulence of the motorcycle, the disconnection signal and the conduction signal may appear alternately and last for a period of time. The duration and amplitude of the signal are related to the intensity of the vibration operation. Among them, the intensity of the vibration operation can include information such as vibration displacement, speed, and acceleration. Combining the disconnection signal and the conduction signal, a signal to be woken up can be generated and output to the control module 130. Figure 2 shows a schematic diagram of the control module 130 according to an embodiment of the present invention. In Figure 2 the illustrated embodiment, the control module 130 can adopt an integrated circuit U3, and U3 can adopt a microcontroller with the model number CMS8S5889. Among them, "NRST" represents the external reset input pin; "AN4"-"AN19", "AN22"-"AN23", "AN40"-"AN44" respectively represent the input pins of the ADC channels "4-19", "22-23", and "40-44". For Figure 2 the floating pins in can be used as reserved ADC channels; "INT0" / "INT1" represent the external interrupt 0 / 1 input pins; "TXD0" represents the UART0 data output pin; "RXD0" represents the UART0 data output / synchronous mode data output pin; "PG0"-"PG1", "PG4"-"PG5" respectively represent the PWM channels "0-1" and "4-5" output pins. Among them, "PG4"-"PG5" can represent the IO pins for controlling the Bluetooth connection state; "SDA" represents the I 2 C data input and output pin; "SCL" represents the I 2The "C" is the clock input pin; "VDD" represents the power supply pin; "GND" represents the ground pin; "DSDA2" represents the programming / debugging data input / output port 2; "DSCK2" represents the programming / debugging clock input port 2. The control module 130 can be any controller or chip that can implement the following technical solutions. For the sake of brevity, they are not listed one by one here. Exemplarily, the wake-up condition threshold is pre-stored in U3, including the frequency and duty cycle of the valid wake-up signal. After U3 receives the signal to be woken up (shown as DO_Wake_CTL in Figure 2 ), U3 can determine whether the signal to be woken up meets the pre-stored wake-up conditions. If it meets, a wake-up signal can be generated. If it does not meet, no processing is required, and it continues to wait for the next signal to be woken up and makes a new round of judgment on it. Specifically, one of the break signal and the conduction signal in the signal to be woken up can be regarded as the valid signal, and the other as the invalid signal. Based on the duty cycle of the valid signal and the invalid signal in the signal to be woken up, it can be determined whether the signal to be woken up meets the wake-up conditions. After generating the wake-up signal, U3 can transmit the wake-up signal to the drive module 140. Specifically, U3 and the drive module 140 can use the two-wire serial communication protocol (I 2 C) to transmit the wake-up signal to the drive module 140 by using Figure 2 's SDA and SCL. Among them, SDA is the data line on the I 2 C bus, and SCL is the clock line on the I 2 C bus. The drive module 140 can control the conduction between the negative electrode of the battery and the external output negative electrode based on the received wake-up signal. Specifically, it can be realized by electronic components with switch functions such as field effect transistors and relays and related circuits. The specific implementation is not limited here. Among them, the external output negative electrode is the electrode on the outer side of the battery case for the battery to supply power externally. The negative electrode of the battery refers to the negative electrode inside the battery. Generally, the positive electrode of the battery and the external output positive electrode are in a connected state in any state and mode. And the drive module 140 responds to the wake-up signal to conduct the negative electrode of the battery and the external output negative electrode, realizing the conduction between the positive and negative electrodes of the battery and the external output positive and negative electrodes. At this time, the battery can supply power to external devices or devices such as engines through the external output positive and negative electrodes, indicating that the battery has been woken up.

[0040] According to the above technical solution, in response to the user's vibration operation, the vibration sensing module 120 can generate and output a signal to be woken up to the control module 130. After comparing with the pre-stored threshold value, the control module 130 can generate a wake-up signal and transmit it to the driving module 140, so that the driving module 140 can conduct the negative electrode of the battery with the external output negative electrode according to the wake-up signal, realizing battery wake-up. Thus, not only the problem of waking up the battery for starting the fire when not in use for a long time in the prior art is solved, but also the operation is simple, the problem of difficult battery wake-up is solved, the battery wake-up efficiency is improved, and the user experience is also improved.

[0041] Preferably, after generating the wake-up signal, the control module 130 can wait for a period of time. If no starting signal is received during this period of time, the above "vibration operation" can be considered as a misoperation. For example, the vehicle shaking caused by ground vibration, etc. Herein, the "period of time" can be reasonably set according to experience or actual requirements and will not be limited herein. This can avoid incorrect battery wake-up and effectively save battery power.

[0042] Figure 3 shows a schematic circuit diagram of the vibration sensing module 120 according to an embodiment of the present invention. As Figure 3 shown, the vibration sensing module 120 may include: a vibration sensing switch S2 and a first field effect transistor Q11. In Figure 3In the illustrated embodiment, the vibration sensing switch may adopt a normally-closed vibration switch S2. S2 may adopt a switch with the model number JYX-1210-X160. The model of the first field-effect transistor is 2N7002, which is an N-channel MOS transistor. It should be noted that X160 is a normally-closed switch. In response to the user's vibration operation, X160 can be disconnected at a corresponding frequency. Correspondingly, the conduction signal output when X160 is closed is regarded as an invalid signal, and the disconnection signal output when X160 is disconnected is regarded as a valid signal. It should be noted that although X160 is disconnected and the power supply module 110 is not connected to the vibration sensing module 120 and cannot provide voltage for it, there is no current flowing, and a real disconnection signal cannot be output. However, the above disconnection signal corresponds to the conduction signal. The conduction signal can be regarded as a high-level signal. Correspondingly, the disconnection signal is a low-level signal. The high and low levels appear alternately, which is the signal to be woken up. The first terminal 1 of the vibration sensing switch S2 is connected to the output terminal (3.3V) of the power supply module 110. The second terminal 2 of the vibration sensing switch S2 is connected to the gate of the first field-effect transistor Q11. The source of the first field-effect transistor Q11 is grounded, and the drain of the first field-effect transistor Q11 is connected to the input terminal of the control module 140. Since the source of Q11 is grounded, when the voltage at the gate of Q11 is high, Q11 can be turned on. That is, when S2 is closed, a conduction signal, that is, a high-level signal, can be output. When S2 is disconnected, Q11 is cut off and a low-level signal is output. When S2 no longer alternates between disconnection and closure, the signal to be woken up corresponding to this vibration operation during this period can be generated.

[0043] Thus, by combining the vibration sensing switch with the MOS transistor, the signal to be woken up can be obtained. The above circuit structure is simple and easy to implement, and the cost is low.

[0044] See Figure 3 , the drain of the first field-effect transistor Q11 and the input terminal of the control module 130 are both electrically connected to the first node. The output terminal (3.3V) of the power supply module 110 is electrically connected to the first node. Thus, the input power supplies of each module can be leveled. Further, a first resistor R31 with a resistance value of 1MΩ is connected between the output terminal of the power supply module 110 and the first node. Thus, the first resistor R31 can be used as a pull-up resistor to stabilize the input signal, improve the reliability of the circuit, and at the same time can also play a role in current limiting to protect the components in the circuit from damage by large currents.

[0045] See Figure 3 , the second terminal 2 of the vibration sensing switch S2 is connected to the gate of the first field-effect transistor Q11 via a second resistor R60. In Figure 3 the illustrated embodiment, the resistance value of the second resistor R60 is 100KΩ. It can play a role in current limiting to protect the components in the circuit from damage by large currents.

[0046] See Figure 3 , the second terminal 2 of the vibration induction switch S2 is connected to the gate of the first field effect transistor Q11 via the filter circuit 121. Among them, the filter circuit 121 includes a third resistor R41 and a first capacitor C18 connected in parallel. Among them, the resistance value of the third resistor R41 is 1 MΩ, and the capacitance value of the first capacitor C18 is 0.1 μF. The first end of the filter circuit 121 is respectively connected to the second terminal 2 of the vibration induction switch S2 and the gate of the first field effect transistor Q11, and the second end of the filter circuit 121 is grounded. Thus, the filter circuit 121 can be used to filter the conduction signal and the disconnection signal to filter out the interference signals therein, ensuring the accuracy of the acquired signal to be awakened, so as to accurately awaken the battery.

[0047] Figure 4 shows a schematic circuit diagram of the driving module 140 according to an embodiment of the present invention. As Figure 4 shown, the driving module 140 may include a switch circuit 141 and a signal processing chip 142.

[0048] In Figure 4 the shown embodiment, the signal processing chip 142 may employ an integrated circuit U1, and U1 may employ an analog front-end chip with the model LS76920. Among them, "VC0" represents the pin connecting the negative terminal of the first battery; "VC1"-"VC5" represent the pins connecting the positive terminals of the 1st-5th batteries; "SRP" represents the positive input terminal pin of the coulomb meter; "SRN" represents the negative input terminal pin of the coulomb meter; "ALERT" represents the pin connecting the interrupt pin of the MCU or the input / output pin of the external secondary protection signal; "BAT" represents the input power pin; "REGOUT" represents the LD0 power output pin, supplying power to the internal I 2 C module and IO; "REGSRC" represents the input power pin of LD0; "CAP1" represents the output pin of LD0 for the internal analog module of the chip; "TS1" wakes up the chip from the ship mode to the normal mode when the pin voltage is higher than a certain threshold. In the normal mode, this pin is used to connect an external thermistor to measure the external temperature information; "SDA" represents the I 2 C data input / output pin; "SCL" represents the I 2 C clock input pin; "VSS" represents the ground pin; "CHG" and "DSG" respectively represent the output pins of the charge / discharge MOS driver. After the U1 obtains the wake-up signal through the I 2 C communication protocol from the control module 130 using SCL and SDA, it can control the switch circuit 141 to conduct or cut off. When the switch circuit 141 conducts, the negative electrode (B-) of the battery can be conducted with the external output negative electrode (P-), realizing battery wake-up. Conversely, if the switch circuit 141 cuts off, the battery is not awakened. SeeFigure 4 , the switching circuit 141 may include multiple groups of symmetrically arranged field effect transistor circuits. The first end of the switching circuit 141 is connected to the negative electrode (B-) of the battery, and the second end of the switching circuit 141 is connected to the external output negative electrode (P-). Each field effect transistor circuit includes a second field effect transistor and a fourth resistor connected to the gate of the second field effect transistor. Specifically, the circuits where Q1 and Q6, Q2 and Q7, Q3 and Q8, Q4 and Q9, Q5 and Q10 are located can be regarded as a group of field effect transistor circuits respectively, that is, in Figure 4 the illustrated embodiment, there are 5 groups of field effect transistor circuits. The model of the second field effect transistor is 04N02D, and the fourth resistors are respectively shown as R21, R8, R9, R10, R11, R12, R13, R14, R15, R16, and their resistance values are all 47Ω. It should be noted that multiple groups of field effect transistor circuits are simultaneously turned on or off in response to the control of U1. The purpose of setting multiple groups here is to effectively divide the voltage and ensure the safety of the components. The reasonable number of multiple groups of field effect transistor circuits can be set according to the specific battery voltage, and the above 5 groups are only exemplary. Thus, after the negative electrode (B-) of the battery is connected to the external output negative electrode (P-), and because the positive electrode (B+) of the battery is in a state of being always connected to the external output positive electrode (P+), the battery can be woken up, so that the inside of the battery can supply power to the outside by using the external output positive and negative electrodes arranged outside the battery case.

[0049] According to the second aspect of the present application, a battery assembly is also proposed, including: the battery wake-up circuit, the battery body and the battery case as described above, wherein the external output negative electrode is arranged outside the battery case.

[0050] According to the third aspect of the present application, an electric vehicle is also proposed, including: the battery assembly as described above. Among them, the electric vehicle may include an electric motorcycle, a hybrid electric vehicle, etc.

[0051] For the sake of convenience of description, the term "connection" can be used here to describe the relationship between one or more elements or features shown in the figure and other elements or features. It should be understood that "connection" may include direct connection or indirect connection via other elements or features, and this article intends to include all these situations.

[0052] It should be noted that the terms used here are only for describing specific embodiments, rather than intending to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form also intends to include the plural form. In addition, it should also be understood that when the terms "include" and / or "comprise" are used in this specification, they indicate the presence of features, steps, operations, components, assemblies and / or their combinations.

[0053] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here.

[0054] The present utility model has been described through the above embodiments. However, it should be understood that the above embodiments are only for the purpose of illustration and example, and are not intended to limit the present utility model to the scope of the described embodiments. In addition, those skilled in the art can understand that the present utility model is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present utility model, and these variations and modifications all fall within the scope of protection required by the present utility model. The scope of protection of the present utility model is defined by the appended claims and their equivalent scope.

Claims

1. A battery wake-up circuit, characterized in that: include: Power supply module, vibration sensing module, control module and drive module; The power supply module is electrically connected to the vibration sensing module, the control module and the driving module respectively; The vibration sensing module is used to generate a disconnection signal and / or a conduction signal based on the user's vibration operation, and output a wake-up signal; The control module is used to output a wake-up signal based on the intensity of the vibration corresponding to the wake-up signal; The driving module is electrically connected to the control module, and the driving module is used to control the battery to switch to the awake state according to the awakening signal, wherein the negative pole of the battery is connected to the output end of the driving module, and the negative pole of the battery is connected to the external output negative pole in the awakening state.

2. The battery wake-up circuit according to claim 1, characterized in that: The vibration sensing module comprises: A vibration sensing switch and a first field effect transistor; Among them, the first end of the vibration sensing switch is connected to the output end of the power supply module, the second end of the vibration sensing switch is connected to the gate of the first field effect transistor, the source of the first field effect transistor is grounded, and the drain of the first field effect transistor is connected to the input end of the control module.

3. The battery wake-up circuit according to claim 2, characterized in that: The drain of the first field effect transistor and the input end of the control module are both electrically connected to the first node, and the output end of the power supply module is electrically connected to the first node.

4. The battery wake-up circuit according to claim 3, characterized in that: A first resistor is connected between the output end of the power supply module and the first node.

5. The battery wake-up circuit according to claim 2, characterized in that: The second end of the vibration sensing switch is connected to the gate of the first field effect transistor via a second resistor.

6. The battery wake-up circuit according to claim 2, characterized in that: The second end of the vibration sensing switch is connected to the gate of the first field effect transistor via a filter circuit, wherein the filter circuit includes a third resistor and a first capacitor connected in parallel, the first end of the filter circuit is respectively connected to the second end of the vibration sensing switch and the gate of the first field effect transistor, and the second end of the filter circuit is grounded.

7. The battery wake-up circuit according to claim 1, characterized in that: The driving module comprises: Switching circuits and signal processing chips; Among them, the signal processing chip is used to control the switching circuit to be turned on or off after obtaining the wake-up signal through a two-wire serial communication protocol with the control module, the first end of the switching circuit is connected to the negative pole of the battery, and the second end of the switching circuit is connected to the external output negative pole.

8. The battery wake-up circuit according to claim 7, characterized in that: The switch circuit includes a plurality of symmetrically arranged field effect transistor circuits, each of which includes a second field effect transistor and a fourth resistor connected to a gate of the second field effect transistor.

9. A battery assembly, characterized in that: include: The battery wake-up circuit according to any one of claims 1 to 8; Battery body; A battery casing, wherein the external output negative electrode is arranged on the outside of the battery casing.

10. An electric vehicle, characterized in that: include: A battery pack as claimed in claim 9.

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