CN219420331U - Battery device and power supply system - Google Patents

Abstract

The application provides a battery device and power supply system, include: the device comprises an anode interface, a cathode interface, a transmission module, a pumping protection module and a battery pack; the positive electrode of the battery pack is connected with one end of the transmission module, the other end of the transmission module is connected with the positive electrode interface, and the negative electrode of the battery pack is connected with the negative electrode interface; the pump electricity protection module is connected with the battery pack and the transmission module and is used for collecting the current charging current of the battery pack and controlling the transmission module to be disconnected when the charging current is higher than a preset threshold value. According to the battery device provided by the scheme, when the charging current is higher than the preset threshold value, the battery device can be effectively protected.

Description

Battery device and power supply system

Technical Field

The application relates to the technical field of batteries, in particular to a battery device and a power supply system.

Background

In practical application, when the battery device is not charged or is placed for a long time, serious power shortage can occur, the voltage of the battery device is very low, the load cannot be powered, and the battery device can be charged by connecting pumping equipment.

However, due to limitations of internal devices of the battery device, the charging current of the battery device exceeds a predetermined threshold, which may cause thermal runaway, and may shorten the service life of the battery device. In the related art, when the charging current of the battery device is higher than a predetermined threshold value, effective protection of the battery cannot be achieved. Therefore, how to realize effective protection of the battery when the charging current is higher than a predetermined threshold value is a current problem to be solved.

Disclosure of Invention

The application provides a battery device and a power supply system, and aims to solve the problem that effective protection of a battery cannot be achieved when a charging current is higher than a preset threshold value.

In a first aspect, the present application provides a battery device comprising: the device comprises an anode interface, a cathode interface, a transmission module, a pumping protection module and a battery pack; the positive electrode of the battery pack is connected with one end of the transmission module, the other end of the transmission module is connected with the positive electrode interface, and the negative electrode of the battery pack is connected with the negative electrode interface; the pump electricity protection module is connected with the battery pack and the transmission module and is used for collecting the current charging current of the battery pack and controlling the transmission module to be disconnected when the charging current is higher than a preset threshold value.

Optionally, the pump protection module includes: the device comprises a sampling unit, a signal amplifying circuit and a signal comparing circuit; the sampling unit is used for collecting the charging current of the battery pack and outputting a voltage signal representing the charging current; the input end of the signal amplifying circuit is connected with the sampling unit and is used for amplifying the voltage signal and outputting the amplified voltage signal; the first input end of the signal comparison circuit is connected with the output end of the signal amplification circuit, the second input end of the signal comparison circuit is connected with the reference voltage representing the threshold value, and the output end of the signal comparison circuit is connected with the transmission module; the signal comparison circuit is used for outputting a first control signal in a first level state when the voltage signal output by the signal amplification circuit is larger than the reference voltage so as to control the transmission module to be disconnected; and outputting a first control signal in a second level state when the voltage signal output by the signal amplifying circuit is not greater than the reference voltage so as to control the transmission module to be conducted.

Optionally, the sampling unit includes: sampling a resistor; one end of the sampling resistor is connected with the negative electrode of the battery pack, and the other end of the sampling resistor is connected with the negative electrode interface; or one end of the sampling resistor is connected with the positive electrode of the battery pack, and the other end of the sampling resistor is connected with the positive electrode interface.

Optionally, the pump protection module further includes: a driving unit and a control unit; the output end of the driving unit is connected with the control end of the transmission module and is used for outputting a second control signal so as to enable the transmission module to be conducted in response to the received second control signal; one end of the control unit is connected with the output end of the driving unit, the other end of the control unit is grounded, and the control end of the control unit is connected with the output end of the signal comparison circuit and is used for being turned on when the signal comparison circuit outputs a control signal in a first level state, and is turned off otherwise.

Optionally, the control unit includes: a first controllable switch; one end of the first controllable switch is connected with the output end of the driving unit, the other end of the first controllable switch is grounded, and the control end of the first controllable switch is connected with the output end of the signal comparison circuit.

Optionally, the driving unit includes: a power supply circuit, a battery management system, and a driving circuit; the power supply circuit is connected with the battery pack and the battery management system and is used for supplying power to the battery management system based on a power supply signal provided by the battery pack; the battery management system is connected with the driving circuit and used for controlling the driving circuit to output the second control signal.

Optionally, the pump protection module further includes: a trigger; the clock end of the trigger is connected with the output end of the signal comparison circuit, the input end of the trigger is connected with a high-level signal, and the output end of the trigger is connected with the control end of the first controllable switch; the battery management system is connected with the reset end of the trigger and is used for sending a reset signal to the trigger when the charging current is not higher than a preset threshold value.

Optionally, the transmission module includes: a second controllable switch and a third controllable switch; one end of the second controllable switch is connected with the positive electrode of the battery pack, and the other end of the second controllable switch is connected with one end of the third controllable switch; the other end of the third controllable switch is connected with the positive electrode interface; the control end of the second controllable switch is connected to the pump electricity protection module, and the control end of the third controllable switch is connected to the pump electricity protection module.

Optionally, the battery device further includes: a battery information acquisition module; the battery information acquisition module is connected with the battery pack and the battery management system and is used for acquiring information of the current battery pack and transmitting the acquired information of the battery pack to the battery management system.

Optionally, the battery information acquisition unit includes: a current collection unit; the current acquisition unit is connected with the sampling unit and is used for acquiring current flowing through the battery pack currently.

Optionally, the battery pack includes a plurality of batteries connected in series; the battery information acquisition module comprises: the battery cell temperature measuring device comprises a total voltage acquisition unit, a battery cell temperature acquisition unit and a battery cell balancing unit; the total voltage acquisition unit is connected with the battery pack and is used for acquiring the total voltage at two ends of the battery pack; the battery cell voltage acquisition unit is connected with each battery of the battery pack and is used for acquiring the voltage at two ends of each battery; the battery core temperature acquisition unit is connected with each battery of the battery pack and is used for acquiring the temperature of each battery; and the battery cell balancing unit is connected with each battery of the battery pack and used for controlling the battery pack to charge and discharge in a balanced manner.

Optionally, the battery device further includes: a communication module and a communication interface; the communication module is connected with the battery management system and the communication interface and is used for establishing communication connection between the battery management system and equipment connected to the communication interface.

In a second aspect, the present application provides a power supply system, comprising: a battery device and a load as hereinbefore described, said load being connected to said battery device.

In the battery device and the power supply system, a positive electrode of a battery pack is connected with one end of a transmission module, the other end of the transmission module is connected with a positive electrode interface, and a negative electrode of the battery pack is connected with a negative electrode interface; the pump electricity protection module is connected with the battery pack and the transmission module and is used for collecting the charging current of the current battery pack and controlling the transmission module to be disconnected when the charging current is higher than a preset threshold value. According to the battery device, the transmission module is arranged between the positive electrode of the battery pack and the positive electrode interface, and when the charging current is higher than the preset threshold value, the transmission module can be controlled to be disconnected through the pump electricity protection module, so that thermal runaway of the battery device is avoided, and effective protection of the battery device is achieved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

Specific embodiments thereof have been shown by way of example in the drawings and will herein be described in more detail. These drawings and the written description are not intended to limit the scope of the inventive concepts of the embodiments in any way, but rather to illustrate the concepts of the embodiments of the present application to those skilled in the art by reference to the specific embodiments.

Fig. 1 is a schematic diagram of a scenario in which a pumping device provided in the present application charges a battery device;

fig. 2 is a schematic structural diagram of a battery device according to a first embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of another battery device according to the first embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a battery device according to a second embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a battery device according to a third embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of another battery device according to the third embodiment of the present application;

fig. 7 is a schematic structural view of yet another battery device according to the third embodiment of the present application;

fig. 8 is a schematic structural view of yet another battery device according to the third embodiment of the present application;

fig. 9 is a schematic structural diagram of a battery device according to a fourth embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of a power supply system according to a fifth embodiment of the present application.

Specific embodiments thereof have been shown by way of example in the drawings and will herein be described in more detail. These drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the accompanying claims.

It should be noted that the brief description of the terms in the present application is only for convenience in understanding the embodiments described below, and is not intended to limit the embodiments of the present application. Unless otherwise indicated, these terms should be construed in their ordinary and customary meaning.

The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between similar or similar objects or entities and not necessarily for describing a particular sequential or chronological order, unless otherwise indicated (Unless otherwise indicated). It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Furthermore, the terms "comprise" and "have," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements is not necessarily limited to those elements expressly listed, but may include other elements not expressly listed or inherent to such product or apparatus. The term "module" as used in this application refers to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and/or software code that is capable of performing the function associated with that element.

Fig. 1 is a schematic diagram of a scenario in which a pumping device provided in the present application charges a battery device. As shown in fig. 1, the pumping device 101 charges the battery device 100 by connecting the battery device 100.

In practical applications, the battery device 100 in the present application may be a vehicle-mounted battery device, and when the vehicle is started, the battery device 100 provides required electric energy to a starter, an ignition system and electric equipment in the vehicle. The pumping device 101 is a device for charging the battery device 100. By way of example, the pumping device may be a fixed charging device, such as a wall-mounted charging peg, a vertical charging peg, a utility power interface, a generator, or the like. The pumping device may also be a mobile charging device, such as a mobile charging vehicle, an on-board battery, a solar charging device, etc., for example.

In combination with the actual scenario, when the battery device 100 fails to be charged in time or is placed for a long time, serious power shortage occurs, and at this time, the battery device 100 may be charged by the pumping device 101. However, due to limitations of the internal components of the battery device 100, the charging current of the battery device 100 exceeds a predetermined threshold value, which may shorten the service life of the battery. For example, the battery device is a lithium battery device, and for electrical devices inside the lithium battery device, rated current and rated voltage exist, and an excessive charging current may affect the service life of the battery device, if the charging current is too high under a low-temperature condition, lithium dendrites easily occur to cause the membrane to be pierced, and finally cause thermal runaway of the battery device. In the related art, when the charging current of the battery device 100 is higher than a predetermined threshold value, effective protection of the battery cannot be achieved.

According to the battery device, the transmission module is arranged between the positive electrode of the battery pack and the positive electrode interface, and when the charging current is higher than the preset threshold value, the transmission module can be controlled to be disconnected through the pump electricity protection module, so that thermal runaway of the battery device is avoided, and effective protection of the battery device is achieved.

The technical scheme of the present application and the technical scheme of the present application are described in detail below with specific examples. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. In the description of the present application, the terms are to be construed broadly in the art, unless explicitly stated or defined otherwise. Embodiments of the present application will be described below with reference to the accompanying drawings.

Example 1

Fig. 2 is a schematic structural diagram of a battery device according to an embodiment of the present application, and as shown in fig. 2, the embodiment provides a battery device, including: positive electrode interface 20, negative electrode interface 21, transmission module 22, pump electricity protection module 23, and battery pack 24.

In this embodiment, the positive electrode of the battery pack 24 is connected to one end of the transmission module 22, the other end of the transmission module 22 is connected to the positive electrode interface 20, and the negative electrode of the battery pack 24 is connected to the negative electrode interface 21. The positive electrode interface 20 and the negative electrode interface 21 are interfaces for connecting pumping equipment or loads with a battery device, the pumping equipment is connected with the positive electrode interface 20 and the negative electrode interface 21 to charge the battery device, the loads are connected with the positive electrode interface 20 and the negative electrode interface 21, and the battery device can supply power for the loads.

In practice, the battery device is charged by substantially charging the battery pack 24. For example, when the transmission module 22 is turned on, the positive electrode of the pumping device is connected to the positive electrode interface 20, the negative electrode of the pumping device is connected to the negative electrode interface 21, and the charging current sequentially flows from the positive electrode of the pumping device through the positive electrode interface 20, the transmission module 22, the positive electrode of the battery pack 24, the negative electrode of the battery pack 24 and the negative electrode interface 21, and finally returns to the negative electrode of the pumping device to form a closed charging loop. It will be appreciated that when the transmission module 22 is open, a closed charging loop cannot be formed and the pumping device cannot charge the battery pack 24.

In practice, the discharge of the battery device is essentially the powering of the load by the battery pack 24. For example, when the transmission module 22 is turned on, the load is connected to the positive electrode interface 20 and the negative electrode interface 21, and the discharge current sequentially flows from the positive electrode of the battery pack 24 through the transmission module 22, the positive electrode interface 20, the load, the negative electrode interface 21, and the negative electrode of the battery pack 24, so as to form a closed discharge circuit. It will be appreciated that when the transmission module 22 is open, a closed discharge loop cannot be formed and the battery pack 24 cannot supply power to the load.

In this embodiment, the pump protection module 23 is connected to the battery pack 24 and the transmission module 22, and is configured to collect the charging current of the current battery pack 24, and control the transmission module 22 to be turned off when the charging current is higher than a predetermined threshold. The charging current of the battery pack 24 is a current that is used by the pumping device to charge the battery device, that is, a current that flows through the battery pack, and flows from the positive electrode of the battery pack 24 to the negative electrode of the battery pack 24.

It can be understood that the pump protection module 23 collects the charging current of the current battery pack 24, determines whether the charging current of the current battery pack 24 is higher than a predetermined threshold, and if the charging current of the current battery pack 24 is not higher than the predetermined threshold, keeps the transmission module 22 on, and the pump device can continue to charge the battery device; if the current charging current of the battery pack 24 is higher than the predetermined threshold, the pumping protection module 23 controls the transmission module 22 to be disconnected, and the pumping device cannot continue to charge the battery device, so that effective protection of the battery device can be achieved.

In one example, fig. 3 is a schematic structural diagram of another battery device according to the first embodiment of the present application, and as shown in fig. 3, the transmission module 22 includes: a second controllable switch 31 and a third controllable switch 32;

one end of the second controllable switch 31 is connected with the positive electrode of the battery pack 24, and the other end of the second controllable switch 31 is connected with one end of the third controllable switch 32; the other end of the third controllable switch 32 is connected with the positive electrode interface 20;

the control terminal of the second controllable switch 31 is connected to the pump protection module 23 and the control terminal of the third controllable switch 32 is connected to the pump protection module 23.

The second controllable switch 31 and the third controllable switch 32 may be (Metal Oxide Semiconductor Field Effect Transistor, MOSFET for short) MOS field effect transistors. For example, the second controllable switch 31 and the third controllable switch 32 are N-type MOS field effect transistors, the control ends of the second controllable switch 31 and the third controllable switch 32 are gates (gates), the Source (Source) of the second controllable switch 31 is connected to the positive electrode of the battery pack 24, the Drain (Drain) of the second controllable switch 31 is connected to the Drain of the third controllable switch 32, the Source of the third controllable switch 32 is connected to the positive electrode interface 20, the Gate of the second controllable switch 31 is connected to the pump protection module 23, and the Gate of the third controllable switch 32 is connected to the pump protection module 23.

It can be understood that when the second controllable switch 31 and the third controllable switch 32 are both N-type MOS field effect transistors, the pump protection module 23 outputs a high level to the gate of the second controllable switch 31, so that the voltage between the gate and the source of the second controllable switch 31 is greater than the turn-on voltage of the second controllable switch 31, and the second controllable switch 31 is turned on; the pump protection module 23 outputs a high level to the gate of the third controllable switch 32 such that the voltage between the gate and the source of the third controllable switch 32 is greater than the turn-on voltage of the third controllable switch 32, and the third controllable switch 32 is turned on.

Optionally, the second controllable switch 31 and the third controllable switch 32 are P-type MOS field effect transistors, the control ends of the second controllable switch 31 and the third controllable switch 32 are gates, the drain electrode of the second controllable switch 31 is connected with the positive electrode of the battery pack 24, the source electrode of the second controllable switch 31 is connected with the source electrode of the third controllable switch 32, the drain electrode of the third controllable switch 32 is connected with the positive electrode interface 20, the gate electrode of the second controllable switch 31 is connected to the pump electricity protection module 23, and the gate electrode of the third controllable switch 32 is connected to the pump electricity protection module 23.

It can be understood that when the second controllable switch 31 and the third controllable switch 32 are P-type MOS field effect transistors, the pump protection module 23 outputs a low level to the gate of the second controllable switch 31, so that the absolute value of the voltage between the source and the gate of the second controllable switch 31 is greater than the absolute value of the turn-on voltage of the second controllable switch 31, and the second controllable switch 31 is turned on; the pump protection module 23 outputs a low level to the gate of the third controllable switch 32 such that the voltage between the gate and the source of the third controllable switch 32 is greater than the turn-on voltage of the third controllable switch 32, and the third controllable switch 32 is turned on.

Alternatively, the first controllable switch 31 and the second controllable switch 32 may be logic gates, and by way of example, the first controllable switch 31 and the second controllable switch 32 are three-state gates, and the control ends of the second controllable switch 31 and the third controllable switch 32 are EN enable control ends, through which the second controllable switch 31 and the third controllable switch 32 can be controlled to be turned off or turned on. For example, when the input EN enables the control terminal to be high, the tri-state gate is in a non-high resistance state, and the tri-state gate is turned on; when the enable control terminal of the input EN is at a low level, the tri-state gate is in a high-resistance state, and the tri-state gate is disconnected.

It can be understood that when the second controllable switch 31 and the third controllable switch 32 are tri-state gates, EN enable control ends of the second controllable switch 31 and the third controllable switch 32 are connected to the pump electric protection module 23, and the pump electric protection module 23 outputs a high level to EN enable control ends of the second controllable switch 31 and the third controllable switch 32, and the second controllable switch 31 and the third controllable switch 32 are turned on; the pump protection module 23 outputs a low level to EN enable control terminals of the second controllable switch 31 and the third controllable switch 32, and the second controllable switch 31 and the third controllable switch 32 are turned off.

In this example, the transmission module includes a second controllable switch and a third controllable switch, where the second controllable switch and the third controllable switch are connected in series in a path of the positive electrode and the positive electrode interface of the battery pack, and when the second controllable switch or the third controllable switch is turned off, the pumping device cannot charge the battery pack, so when the charging current is higher than a predetermined threshold value, the pumping protection module controls the second controllable switch or the third controllable switch to be turned off, so as to implement effective protection of the battery device.

In the battery device provided by the embodiment, the positive electrode of the battery pack is connected with one end of the transmission module, the other end of the transmission module is connected with the positive electrode interface, and the negative electrode of the battery pack is connected with the negative electrode interface; the pump electricity protection module is connected with the battery pack and the transmission module and is used for collecting the charging current of the current battery pack and controlling the transmission module to be disconnected when the charging current is higher than a preset threshold value. In the battery device of the embodiment, the transmission module is arranged between the positive electrode and the positive electrode interface of the battery pack, and when the charging current is higher than the preset threshold value, the transmission module can be controlled to be disconnected through the pumping protection module, so that the thermal runaway of the battery device is avoided, and the effective protection of the battery device is realized.

Example two

Fig. 4 is a schematic structural diagram of a battery device according to a second embodiment of the present application, as shown in fig. 4, on the basis of the above embodiment, a battery device according to the present embodiment, and a pump protection module 23 includes: a sampling unit 41, a signal amplifying circuit 42, and a signal comparing circuit 43.

In this embodiment, the sampling unit 41 is configured to collect the charging current of the battery pack 24 and output a voltage signal representing the charging current. For example, the sampling unit 41 may be connected to the battery pack 24, collect the charging current of the battery pack 24, and multiply the collected charging current with a fixed resistance value to obtain a voltage signal representing the charging current.

The input terminal of the signal amplifying circuit 42 is connected to the sampling unit 41, and amplifies the voltage signal and outputs the amplified voltage signal. Alternatively, the charging current of the battery pack 24 is a direct current, and the signal amplifying circuit 42 may be a voltage transformation circuit or a voltage boosting circuit. In practical applications, the signal amplifying circuit 42 may amplify the voltage signal by a preset amplification factor, so that the amplified voltage signal is in an order of magnitude with the reference voltage representing the threshold value, so that the signal comparing circuit 43 can compare the voltage signal with the reference voltage representing the threshold value.

In this embodiment, a first input terminal of the signal comparing circuit 43 is connected to an output terminal of the signal amplifying circuit 42, a second input terminal of the signal comparing circuit 42 is connected to a reference voltage representing the threshold value, and an output terminal of the signal comparing circuit 43 is connected to the transmission module 22; the signal comparing circuit 43 is configured to output a first control signal in a first level state when the voltage signal output by the signal amplifying circuit 42 is greater than the reference voltage, so as to control the transmission module 22 to be turned off; and outputting a first control signal in a second level state when the voltage signal output from the signal amplifying circuit 42 is not greater than the reference voltage, so as to control the transmission module 22 to be turned on.

In practical applications, the reference voltage represents a threshold value of the charging current, and the voltage signal output by the signal amplifying circuit 42 is greater than the reference voltage, which indicates that the charging current of the current battery pack 24 is higher than the predetermined threshold value; the voltage signal output by the signal amplification circuit 42 is not greater than the above-described reference voltage, indicating that the current charge current of the battery pack 24 is not higher than the predetermined threshold.

For example, the first control switch 31 and the second control switch 32 are N-type MOS transistors, the control ends of the first control switch 31 and the second control switch 32 are connected to the output end of the signal comparison circuit 43, the first control signal in the first level state is a low level signal, and the first control signal in the second level state is a high level signal. When the voltage signal output by the signal amplifying circuit 42 is greater than the reference voltage, a low-level signal is output to the first control switch 31 or the second control switch 32, and the first control switch 31 or the second control switch 32 is turned off, so that the transmission module 22 is controlled to be turned off; when the voltage signal output by the signal amplifying circuit 42 is not greater than the reference voltage, a high level signal is output to the first control switch 31 and the second control switch 32, and the first control switch 31 and the second control switch 32 are turned on, thereby controlling the transmission module 22 to be turned on.

Optionally, the first control switch 31 and the second control switch 32 are P-type MOS transistors, the control ends of the first control switch 31 and the second control switch 32 are connected to the output end of the signal comparing circuit 43, the first control signal in the first level state is a high level signal, and the first control signal in the second level state is a low level signal. When the voltage signal output by the signal amplifying circuit 42 is greater than the reference voltage, a high level signal is output to the first control switch 31 or the second control switch 32, and the first control switch 31 or the second control switch 32 is turned off, thereby controlling the transmission module 22 to be turned off; when the voltage signal output by the signal amplifying circuit 42 is not greater than the reference voltage, a low level signal is output to the first control switch 31 and the second control switch 32, and the first control switch 31 and the second control switch 32 are turned on, thereby controlling the transmission module 22 to be turned on.

Optionally, when the signal comparing circuit 43 outputs a third control signal to the transmission module 22, the transmission module 22 is turned on; when the signal comparison circuit 43 does not output the third control signal to the transmission module 22, the transmission module 22 is disconnected. For example, the first control switch 31 and the second control switch 32 are N-type MOS transistors, and the control ends of the first control switch 31 and the second control switch 32 are connected to the output end of the signal comparison circuit 43. When the voltage signal output by the signal amplifying circuit 42 is greater than the reference voltage, the signal comparing circuit 43 does not output a third control signal to the transmission module 22, and the first control switch 31 and the second control switch 32 are turned off, thereby realizing control of turning off the transmission module 22; when the voltage signal output from the signal amplifying circuit 42 is not greater than the reference voltage, the signal comparing circuit 43 outputs a third control signal to the transmission module 22, the third control signal is a high level signal, and the first control switch 31 and the second control switch 32 are turned on, so as to control the transmission module 22 to be turned on.

In the present embodiment, the sampling unit 41 collects the charging current of the battery pack 24 and outputs a voltage signal representing the charging current; the signal amplification circuit 42 amplifies the voltage signal representing the above-described charging current to the same magnitude as the reference voltage; the signal comparing circuit 43 compares the amplified voltage signal with a reference voltage, and outputs a first control signal in a first level state to control the transmission module to be turned off when the voltage signal output from the signal amplifying circuit 42 is greater than the reference voltage. The voltage signal output by the signal amplifying circuit 42 is greater than the reference voltage, which indicates that the charging current is higher than the preset threshold, and the signal amplifying circuit 42 outputs a first control signal in a first level state to the transmission module 22, so as to control the transmission module 22 to be disconnected, thereby realizing effective protection of the battery device.

In one example, the sampling unit 41 includes: sampling a resistor;

one end of the sampling resistor is connected to the negative electrode of the battery pack 24, and the other end of the sampling resistor is connected to the negative electrode interface 21; alternatively, one end of the sampling resistor is connected to the positive electrode of the battery pack 24, and the other end of the sampling resistor is connected to the positive electrode interface 20.

The sampling resistor is connected in series in the charging path of the battery pack 24, and when the pumping device charges the battery device, the current flowing through the sampling resistor is the charging current of the battery pack 24. In practical applications, the resistance of the sampling resistor is fixed, the voltage difference between two ends of the sampling resistor can be used as a voltage signal representing the charging current, the voltage difference between two ends of the sampling resistor is used as the input of the signal circuit, the signal amplifying circuit 42 amplifies the voltage difference between two ends of the sampling resistor, the signal comparing circuit 43 compares the amplified voltage signal with a reference voltage, and when the voltage signal output by the signal amplifying circuit 42 is greater than the reference voltage, a first control signal in a first level state is output to control the transmission module 22 to be disconnected; and outputting a first control signal in a second level state when the voltage signal output from the signal amplifying circuit 42 is not greater than the reference voltage, so as to control the transmission module 22 to be turned on.

In this example, by connecting sampling resistors in series in the charging path of the battery pack, a voltage signal representing the charging current can be obtained, the signal amplifying circuit amplifies the voltage signal, the signal comparing circuit compares the voltage signal with a reference voltage, and when the voltage signal output by the signal amplifying circuit is greater than the reference voltage, a first control signal in a first level state is output to control the transmission module to be disconnected, so that effective protection of the battery device is achieved.

In the battery device provided by the embodiment, the sampling unit collects the charging current of the battery pack and outputs a voltage signal representing the charging current; the input end of the signal amplifying circuit is connected with the sampling unit and is used for amplifying the voltage signal and outputting the amplified voltage signal; the first input end of the signal comparison circuit is connected with the output end of the signal amplification circuit, the second input end of the signal comparison circuit is connected with the reference voltage representing the threshold value, and the output end of the signal comparison circuit is connected with the transmission module; the signal comparison circuit is used for outputting a first control signal in a first level state when the voltage signal output by the signal amplification circuit is larger than the reference voltage so as to control the transmission module to be disconnected; and outputting a first control signal in a second level state when the voltage signal output by the signal amplifying circuit is not greater than the reference voltage so as to control the transmission module to be conducted. In this embodiment, the voltage signal output by the signal amplifying circuit is greater than the reference voltage, which indicates that the charging current is higher than the preset threshold, and the signal amplifying circuit can output a first control signal in a first level state to the transmission module to control the transmission module to be disconnected, so that thermal runaway of the battery device is avoided, and effective protection of the battery device is realized.

Example III

Fig. 5 is a schematic structural diagram of a battery device according to a third embodiment of the present application, as shown in fig. 5, on the basis of the foregoing embodiment, the battery device according to the present embodiment, and the pump protection module 23 further includes: a driving unit 51 and a control unit 52.

The output end of the driving unit 51 is connected to the control end of the transmission module 22, and is configured to output a second control signal, so that the transmission module 22 is turned on in response to the received second control signal. In practical applications, the transmission module 22 needs to be turned on during the charging or discharging process of the battery pack 24, and therefore, the driving unit 51 outputs the second control signal to the transmission module 22 during the charging or discharging process of the battery pack 24.

In this embodiment, one end of the control unit 52 is connected to the output end of the driving unit 51, the other end of the control unit 52 is grounded, and the control end of the control unit 52 is connected to the output end of the signal comparing circuit 43, so as to be turned on when the signal comparing circuit 43 outputs a control signal in a first level state, and turned off otherwise.

In practical applications, when the voltage signal output by the signal amplifying circuit 42 is greater than the reference voltage, the signal comparing circuit 43 outputs a control signal in a first level state, and the control unit 52 is turned on after receiving the control signal in the first level state. Since one end of the control unit 52 is connected to the output end of the driving unit 51, the other end of the control unit 52 is grounded, and when the control unit 52 is turned on, the output end of the driving unit 51 is grounded, the transmission module 22 cannot receive the second control signal, and the transmission module 22 is turned off.

It will be appreciated that when the charging current is higher than the predetermined threshold, the voltage signal output by the signal amplifying circuit 42 is greater than the reference voltage, the signal comparing circuit 43 outputs a control signal in the first level state to the control unit 52, the control unit 52 is turned on, the output terminal of the driving unit 51 is grounded, the transmission module 22 cannot receive the second control signal, and the transmission module 22 is turned off, thereby achieving effective protection of the battery device.

In one example, fig. 6 is a schematic structural diagram of another battery device provided in the third embodiment of the present application, and as shown in fig. 6, the control unit 52 includes: a first controllable switch 61.

In this example, one end of the first controllable switch 61 is connected to the output end of the driving unit 51, the other end of the first controllable switch 61 is grounded, and the control end of the first controllable switch 61 is connected to the output end of the signal comparing circuit 43.

The first controllable switch 61 may be a MOS field effect transistor. The first controllable switch 61 is an N-type MOS field effect transistor, the control end of the first controllable switch 61 is a gate, the control end of the first controllable switch 61 is connected to the output end of the signal comparing circuit 43, the source electrode of the first controllable switch 61 is grounded, and the drain electrode of the first controllable switch 61 is connected to the output end of the driving unit 51. It can be understood that when the first controllable switch 61 is an N-type MOS field effect transistor, the control signal in the first level state refers to a high level signal, so that the voltage between the gate and the source of the first controllable switch 61 is greater than the turn-on voltage of the first controllable switch 61, and the first controllable switch 61 is turned on.

Optionally, the first controllable switch 61 is a P-type MOS field effect transistor, a control end of the first controllable switch 61 is a gate, the control end of the first controllable switch 61 is connected to the output end of the signal comparing circuit 43, a source electrode of the first controllable switch 61 is grounded, and a drain electrode of the first controllable switch 61 is connected to the output end of the driving unit 51. It can be understood that when the first controllable switch 61 is a P-type MOS field effect transistor, the control signal in the first level state refers to a low level signal, so that the absolute value of the voltage between the gate and the source of the first controllable switch 61 is greater than the absolute value of the turn-on voltage of the first controllable switch 61, and the first controllable switch 61 is turned on.

In this example, when the charging current is higher than the predetermined threshold, the voltage signal output by the signal amplifying circuit is greater than the reference voltage, the signal comparing circuit outputs a control signal in a first level state to the first controllable switch, the first controllable switch is turned on, the output end of the driving unit is grounded, the transmission module cannot receive the second control signal, and the transmission module is turned off, so that effective protection of the battery device is achieved.

In one example, fig. 7 is a schematic structural diagram of still another battery device provided in the third embodiment of the present application, and as shown in fig. 7, the driving unit 51 includes: a power supply circuit 71, a battery management system 72, and a drive circuit 73.

In this example, the power supply circuit 71 is connected to the battery pack 24 and the battery management system 72, and the power supply circuit 71 is configured to supply power to the battery management system 72 based on a power supply signal provided by the battery pack 24.

In practice, one end of the power supply circuit 71 may be connected to the negative electrode of the battery pack 24, and the other end of the power supply circuit 71 may be connected to the positive electrode of the battery pack 24, obtain a power supply signal from the battery pack 24, and supply power to the battery management system 72. Alternatively, one end of the power supply circuit 71 may be connected to the negative electrode of the battery pack 24, the negative electrode of the battery pack 24 is grounded, the other end of the power supply circuit 71 may be connected to the positive electrode of the battery pack 24 and the positive electrode interface 20, and when the battery pack 24 discharges, the power supply circuit 71 obtains a power supply signal from the battery pack 24; when the pumping device charges the battery device, the power supply circuit 71 acquires a power supply signal from the pumping device.

In this example, the battery management system 72 is connected to the driving circuit 73, and is configured to control the driving circuit 73 to output the second control signal. In connection with the above example, the transmission module 22 is required to be in a conductive state during the charge and discharge of the battery pack 24. Specifically, when the battery pack 24 is charged and discharged, the battery management system 72 controls the driving circuit 73 to output the second control signal to the transmission module 22, so as to turn on the transmission module 22.

In this example, the power supply circuit supplies power to the battery management system based on the power supply signal provided by the battery pack, and the battery management system 72 is connected to the driving circuit 73 to control the driving circuit 73 to output a second control signal to the transmission module so as to turn on the transmission module.

In one example, fig. 8 is a schematic structural diagram of still another battery device provided in the third embodiment of the present application, and as shown in fig. 8, the pump protection module 23 further includes: a trigger 81.

The clock end of the trigger 81 is connected to the output end of the signal comparing circuit 43, the input end of the trigger 81 is connected to the high level signal, and the output end of the trigger 81 is connected to the control end of the first controllable switch 61. Alternatively, the flip-flop 81 is a D flip-flop, and when the signal input from the clock terminal of the flip-flop 81 changes from low level to high level, the signal output from the output terminal of the flip-flop 81 is the signal input from the input terminal of the flip-flop 81, i.e., the high level signal.

In this example, when the voltage signal output from the signal amplification circuit 42 is not greater than the above-described reference voltage, the signal comparison circuit 43 outputs a low level; when the voltage signal output from the signal method circuit 42 is greater than the above-described reference voltage, the signal comparison circuit 43 outputs a high level.

It will be understood that when the charging current is higher than the preset threshold, the voltage signal output by the signal amplifying circuit 42 is greater than the reference voltage, the signal comparing circuit 43 outputs a high level signal, the signal input by the clock terminal of the trigger 81 is changed from a low level signal to a high level signal, the output terminal of the trigger 81 outputs a high level signal, the control terminal of the first controllable switch 61 inputs a high level signal, the first controllable switch 61 is turned on, the output terminal of the driving circuit 73 is grounded, and the transmission module 22 is turned off.

Wherein, the battery management system 72 is connected with the reset terminal of the trigger 81, and is used for sending a reset signal to the trigger 81 when the charging current is not higher than a predetermined threshold value.

When the signal input from the clock terminal of the flip-flop 81 changes from low level to high level, the signal output from the output terminal is the signal input from the input terminal, and the current output from the output terminal is consistent with the output at the previous time until the signal input from the next clock terminal changes from low level to high level by the flip-flop 81. It will be appreciated that, after the signal input to the clock terminal of the flip-flop 81 changes from low level to high level, the signal input to the clock terminal of the flip-flop 81 is a low level signal even if the charging current is not higher than the predetermined threshold value before the signal input to the next clock terminal changes from low level to high level, the output terminal of the flip-flop 81 always keeps outputting a high level signal, and the first controllable switch 61 is turned on, and the transmission module 22 is turned off.

In this example, when the charging current is not higher than the predetermined threshold, the battery management system 72 sends a reset signal to the trigger 81, the output terminal of the trigger 81 outputs a low level signal, the first controllable switch 61 is turned off, the transmission module 22 is turned on, and the pumping device can charge the battery pack 24.

In one possible embodiment, the battery device further includes: a communication module and a communication interface; the communication module is connected to the battery management system 72 and the communication interface, and is configured to establish a communication connection between the battery management system 72 and a device connected to the communication interface.

In practical applications, the battery management system 72 determines information to be transmitted, transmits the information to be transmitted to the communication module, and the communication module sends the information to be transmitted to a device connected to the communication interface. Correspondingly, the communication module receives the information to be transmitted sent by the device connected to the communication interface, and the communication module transmits the received information to be transmitted to the battery management system 72.

In this embodiment, the battery management system can communicate with the device connected to the communication interface based on the communication module, thereby enriching the functions of the battery device.

In the battery device provided by the embodiment, the output end of the driving unit is connected with the control end of the transmission module and is used for outputting a second control signal so as to enable the transmission module to be conducted in response to the received second control signal; one end of the control unit is connected with the output end of the driving unit, the other end of the control unit is grounded, and the control end of the control unit is connected with the output end of the signal comparison circuit and is used for being turned on when the signal comparison circuit outputs a control signal in a first level state, and otherwise, the control signal is turned off. In this embodiment, when the charging current is higher than the predetermined threshold, the voltage signal output by the signal amplifying circuit is greater than the reference voltage, the signal comparing circuit may output the control signal in the first level state to the control unit, the control unit is turned on, the output terminal of the driving unit is grounded, the transmission module cannot receive the second control signal, and the transmission module is turned off, thereby avoiding thermal runaway of the battery device and realizing effective protection of the battery device.

Example IV

Fig. 9 is a schematic structural diagram of a battery device according to a fourth embodiment of the present application, as shown in fig. 9, where, on the basis of the foregoing embodiment, the battery device according to the present embodiment further includes: the battery information acquisition module 91.

The battery information collection module 91 is connected to the battery pack 24 and the battery management system 72, and is configured to collect information of the current battery pack 24 and transmit the collected information of the battery pack 24 to the battery management system 72.

In practical applications, the battery management system 72 receives the information of the battery pack 24 collected by the battery information collection module 91, and can learn the current situation of the battery pack 24, so as to control the driving circuit 73 to output the second control signal. For example, the battery management system 72 knows that the current remaining power of the battery pack 24 is smaller based on the collected information of the battery pack 24, and the control driving circuit 73 does not output the second control signal, the transmission module 22 is disconnected, and the battery pack 24 does not supply power to the load.

In one possible embodiment, the battery information collection module 91 includes: and a current acquisition unit.

The current collection unit is connected to the sampling unit 41, and is configured to collect current flowing through the battery pack 24.

For example, the current collection unit may be directly connected to the sampling unit 41, and the charging current of the battery pack 24 collected by the sampling unit 41 is used as the current currently flowing through the battery pack 24. Alternatively, the current collecting unit may be connected to the output terminal of the sampling unit 41, to obtain the voltage signal representing the charging current output by the sampling unit 41, and obtain the current currently flowing through the battery pack 24 through calculation. Alternatively, when the sampling unit 41 includes a sampling resistor, the current collecting unit may be connected to two ends of the sampling resistor, collect a voltage difference between two ends of the sampling resistor, and obtain a current flowing through the battery pack 24 by calculating a ratio of the voltage difference to a resistance value of the sampling resistor.

In this embodiment, the current collecting unit is connected to the sampling unit 41 to collect the current flowing through the battery pack 24, the battery information collecting module 91 transmits the collected current flowing through the battery pack 24 to the battery management system 72, and the battery management system 72 can determine the state of the current battery pack 24 according to the current flowing through the battery pack 24, for example, whether the battery pack 24 is in a charging or discharging state according to the direction of the current flowing through the battery pack 24.

In one possible embodiment, the battery pack 24 includes a plurality of batteries connected in series; the battery information acquisition module 91 includes: the battery cell temperature balancing device comprises a total voltage acquisition unit, a battery cell temperature acquisition unit and a battery cell balancing unit.

The total voltage collecting unit is connected with the battery pack 24 and is used for collecting total voltages at two ends of the battery pack 24; the cell voltage acquisition unit is connected with each battery of the battery pack 24 and is used for acquiring voltages at two ends of each battery; the battery core temperature acquisition unit is connected with each battery of the battery pack 24 and is used for acquiring the temperature of each battery; the cell balancing unit is connected to each battery of the battery pack 24, and is used for controlling the battery pack to charge and discharge in a balanced manner.

For example, a total voltage acquisition unit is connected to both the positive and negative terminals of the battery pack 24 to acquire the total voltage of the battery pack 24. The cell voltage acquisition unit is connected to both the positive and negative terminals of each battery of the battery pack 24, and acquires the voltages of both the terminals of each battery of the battery pack 24. The cell temperature acquisition unit is connected with a temperature sensor outside each battery of the battery pack 24, and acquires the temperature of each battery. The cell balancing unit is connected with each battery of the battery pack 24, determines the remaining capacity of each battery of the battery pack 24, and controls each battery of the battery pack 24 to charge and discharge in a balancing manner.

It should be noted that, the information of the battery pack 24 collected by the total voltage collecting unit, the cell temperature collecting unit, and the cell balancing unit is transmitted to the battery management system 72 through the interface of the battery information collecting module 91. Optionally, the battery collection information collection module 91 transmits the collected information of the current battery pack 24 to the battery management system 72 through a serial peripheral interface (Serial Peripheral Interface, SPI).

In the battery device provided in this embodiment, the battery information collection module is connected with the battery pack and the battery management system, and is configured to collect information of the current battery pack, and transmit the collected information of the battery pack to the battery management system. In this embodiment, the battery information acquisition module may be used to acquire battery information.

Example five

A fifth embodiment of the present application provides a power supply system, including: a load and a battery device according to the foregoing embodiment, the load being connected to the battery device.

In an example, fig. 10 is a schematic structural diagram of a power supply system provided in a fifth embodiment of the present application, as shown in fig. 10, where the power supply system of the present embodiment includes a load 101 and a battery device as in the previous embodiment. Based on the above embodiment, the first controllable switch 61 is a MOS transistor 611, the second controllable switch 31 is a MOS transistor 311, the third controllable switch 32 is a MOS transistor 321, and the sampling unit 41 includes a sampling resistor 411. Wherein, MOS tube 611, MOS tube 311 and MOS tube 321 are all N-type MOS tubes.

In practical application, the positive electrode of the pumping device is connected with the positive electrode interface 20 and one end of the load 101, the negative electrode of the pumping device is connected with the negative electrode interface 21 and the other end of the load 101, and the pumping device supplies power to the load 101 when the pumping device charges the battery device. In the process of charging the battery device by the pumping equipment, the voltage difference at two ends of the sampling resistor 411 is used as the input of the signal amplifying circuit 42, the signal amplifying circuit 42 transmits the amplified voltage signal to the signal comparing circuit 43, the signal comparing circuit 43 compares the amplified voltage signal with the reference voltage, when the amplified voltage signal is larger than the reference voltage, the signal comparing circuit 43 outputs a high-level signal to the clock end of the trigger 81, the trigger 81 outputs a high level, the MOS tube 611 is connected, the control end of the MOS tube 311 is grounded, and the MOS tube 311 is disconnected, so that the effective protection of the battery device is realized.

It should be noted that, the electric quantity of the battery pack 24 is lower, the battery device stops charging the load 101, when the pumping device starts charging the battery device, the MOS tube 311 is turned on, the MOS tube 321 is turned off, the charging current passes through the parasitic diode of the MOS tube 321 and the MOS tube 311 to realize the conduction of the transmission module 22, the battery information acquisition module 91 transmits the charging current acquired by the battery pack 24 to the battery management system 72, and the battery management system 72 controls the driving circuit 73 to output a second control signal to the MOS tube 321 to control the MOS tube 321 to conduct.

Correspondingly, when the battery device is full, the pumping equipment stops charging the battery device, when the battery device supplies power to the load 101, the MOS tube 321 is turned on, the MOS tube 311 is turned off, the discharging current passes through the parasitic diode of the MOS tube 311 and the MOS tube 321 to realize the conduction of the transmission module 22, the battery information acquisition module 91 transmits the discharging current acquired by the battery pack 24 to the battery management system 72, and the battery management system 72 controls the driving circuit 73 to output a second control signal to the MOS tube 311 to control the MOS tube 311 to be turned on. It can be appreciated that during the charging and discharging process of the battery device, both the MOS transistor 311 and the MOS transistor 321 are turned on.

In practical applications, since the battery device is not used for a long time, the battery pack 24 has low electric power, the battery pack 71 cannot provide the power supply signal for the power supply circuit 71, the power supply circuit 71 cannot supply power to the battery management system 72, and the battery management system 72 is in a sleep state. Alternatively, the output terminal of the trigger 81 is connected to the power circuit 71, the trigger 81 outputs a high level signal as an enable signal for activating the power circuit 71, so that the power circuit 71 changes from a sleep state to an operating state, the battery information collecting module 91 transmits the collected information of the battery pack 24 to the battery management system 72, and the battery management system 72 communicates with the vehicle-mounted device connected to the communication interface 107 through the communication module 106 to request to charge the battery device.

It will be appreciated that during the discharging process of the battery pack 24, the discharging current direction is opposite to the charging current direction, the MOS transistor 611 is kept off, and the MOS transistor 311 and the MOS transistor 321 are turned on. The battery information collection module 91 collects information of the battery pack 24, the battery management system 72 monitors the current state of the battery pack 24 according to the information of the battery pack 24, when the battery pack 24 fails or the residual electric quantity is small, the control driving circuit 73 does not output a second control signal to the MOS tube 311 and the MOS tube 321, and the MOS tube 311 and the MOS tube 321 are disconnected so as to prevent thermal runaway or other safety faults of the battery pack 24.

The power supply system provided by the embodiment comprises a load and the battery device as in the previous embodiment, and can realize effective protection of the battery device.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims. In the technical scheme of the application, the related information such as user data and the like is collected, stored, used, processed, transmitted, provided, disclosed and the like, and all meet the requirements of related laws and regulations without violating the common-practice custom.

It is to be understood that the present application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (13)

1. A battery device, characterized by comprising: the device comprises an anode interface, a cathode interface, a transmission module, a pumping protection module and a battery pack;

the positive electrode of the battery pack is connected with one end of the transmission module, the other end of the transmission module is connected with the positive electrode interface, and the negative electrode of the battery pack is connected with the negative electrode interface;

the pump electricity protection module is connected with the battery pack and the transmission module and is used for collecting the current charging current of the battery pack and controlling the transmission module to be disconnected when the charging current is higher than a preset threshold value.

2. The battery device of claim 1, wherein the pump protection module comprises: the device comprises a sampling unit, a signal amplifying circuit and a signal comparing circuit;

the sampling unit is used for collecting the charging current of the battery pack and outputting a voltage signal representing the charging current;

the input end of the signal amplifying circuit is connected with the sampling unit and is used for amplifying the voltage signal and outputting the amplified voltage signal;

The first input end of the signal comparison circuit is connected with the output end of the signal amplification circuit, the second input end of the signal comparison circuit is connected with the reference voltage representing the threshold value, and the output end of the signal comparison circuit is connected with the transmission module; the signal comparison circuit is used for outputting a first control signal in a first level state when the voltage signal output by the signal amplification circuit is larger than the reference voltage so as to control the transmission module to be disconnected; and outputting a first control signal in a second level state when the voltage signal output by the signal amplifying circuit is not greater than the reference voltage so as to control the transmission module to be conducted.

3. The battery device according to claim 2, wherein the sampling unit includes: sampling a resistor;

one end of the sampling resistor is connected with the negative electrode of the battery pack, and the other end of the sampling resistor is connected with the negative electrode interface; or alternatively, the process may be performed,

one end of the sampling resistor is connected with the positive electrode of the battery pack, and the other end of the sampling resistor is connected with the positive electrode interface.

4. The battery device of claim 2, wherein the pump protection module further comprises: a driving unit and a control unit;

The output end of the driving unit is connected with the control end of the transmission module and is used for outputting a second control signal so as to enable the transmission module to be conducted in response to the received second control signal;

one end of the control unit is connected with the output end of the driving unit, the other end of the control unit is grounded, and the control end of the control unit is connected with the output end of the signal comparison circuit and is used for being turned on when the signal comparison circuit outputs a control signal in a first level state, and is turned off otherwise.

5. The battery device according to claim 4, wherein the control unit includes: a first controllable switch;

one end of the first controllable switch is connected with the output end of the driving unit, the other end of the first controllable switch is grounded, and the control end of the first controllable switch is connected with the output end of the signal comparison circuit.

6. The battery device according to claim 5, wherein the driving unit includes: a power supply circuit, a battery management system, and a driving circuit;

the power supply circuit is connected with the battery pack and the battery management system and is used for supplying power to the battery management system based on a power supply signal provided by the battery pack;

The battery management system is connected with the driving circuit and used for controlling the driving circuit to output the second control signal.

7. The battery device of claim 6, wherein the pump protection module further comprises: a trigger;

the clock end of the trigger is connected with the output end of the signal comparison circuit, the input end of the trigger is connected with a high-level signal, and the output end of the trigger is connected with the control end of the first controllable switch;

the battery management system is connected with the reset end of the trigger and is used for sending a reset signal to the trigger when the charging current is not higher than a preset threshold value.

8. The battery device of claim 1, wherein the transmission module comprises: a second controllable switch and a third controllable switch;

one end of the second controllable switch is connected with the positive electrode of the battery pack, and the other end of the second controllable switch is connected with one end of the third controllable switch; the other end of the third controllable switch is connected with the positive electrode interface;

the control end of the second controllable switch is connected to the pump electricity protection module, and the control end of the third controllable switch is connected to the pump electricity protection module.

9. The battery device of claim 6, wherein the battery device further comprises: a battery information acquisition module;

the battery information acquisition module is connected with the battery pack and the battery management system and is used for acquiring information of the current battery pack and transmitting the acquired information of the battery pack to the battery management system.

10. The battery device according to claim 9, wherein the battery information acquisition unit includes: a current collection unit;

the current acquisition unit is connected with the sampling unit and is used for acquiring current flowing through the battery pack currently.

11. The battery device of claim 9, wherein the battery pack comprises a plurality of cells connected in series; the battery information acquisition module comprises: the battery cell temperature measuring device comprises a total voltage acquisition unit, a battery cell temperature acquisition unit and a battery cell balancing unit;

the total voltage acquisition unit is connected with the battery pack and is used for acquiring the total voltage at two ends of the battery pack; the battery cell voltage acquisition unit is connected with each battery of the battery pack and is used for acquiring the voltage at two ends of each battery; the battery core temperature acquisition unit is connected with each battery of the battery pack and is used for acquiring the temperature of each battery; and the battery cell balancing unit is connected with each battery of the battery pack and used for controlling the battery pack to charge and discharge in a balanced manner.

12. The battery device according to any one of claims 1 to 11, further comprising: a communication module and a communication interface;

the communication module is connected with the battery management system and the communication interface and is used for establishing communication connection between the battery management system and equipment connected to the communication interface.

13. A power supply system, comprising: the battery device and load of any one of claims 1-12, the load being connected to the battery device.