Battery, discharging method, power utilization system and medium

Abstract

The invention provides a battery, a discharging method, a power utilization system and a medium, and relates to the technical field of batteries, and the method comprises an energy storage module, a main control module, a driving module and a voltage conversion module; the energy storage module is electrically connected with the main control module and the voltage conversion module; the main control module is also electrically connected with the driving module; the driving module is also electrically connected with the voltage conversion module; the main control module is used for acquiring the current voltage of the energy storage module when the voltage conversion module is electrically connected with the load, and sending a discharge control signal to the driving module according to the preset discharge voltage and the current voltage; the driving module is used for sending a discharge driving signal to the voltage conversion module according to the discharge control signal; the voltage conversion module is used for converting the current voltage into a target discharge voltage according to the discharge driving signal; and outputting the target discharge voltage to the load, wherein a difference value between the target discharge voltage and the preset discharge voltage belongs to a preset voltage difference value range. According to the invention, stable voltage is output to the load.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery, a discharge method, a power system and a medium. Background Art

[0002] Common batteries on the market are generally lithium iron phosphate batteries, lithium manganese oxide batteries or sodium ion batteries. For lithium iron phosphate batteries and lithium manganese oxide batteries with a narrow voltage range, as the power decreases during use, the kinetic energy of the electrical equipment is less affected.

[0003] However, for sodium-ion batteries with a wide voltage range, as the power level decreases during use, the kinetic energy of electrical equipment is greatly affected, resulting in a poor user experience. Summary of the invention

[0004] In view of this, the purpose of the present invention is to overcome the deficiencies in the prior art and provide a battery, a discharge method, a power system and a medium. The present invention provides the following technical solutions:

[0005] In a first aspect, the present invention provides a battery, comprising: an energy storage module, a main control module, a drive module and a voltage conversion module; the energy storage module is electrically connected to the main control module and the voltage conversion module; the main control module is also electrically connected to the drive module; the drive module is also electrically connected to the voltage conversion module;

[0006] The main control module is used to obtain the current voltage of the energy storage module when the voltage conversion module is electrically connected to the load, and send a discharge control signal to the driving module according to the preset discharge voltage and the current voltage; the driving module is used to send a discharge drive signal to the voltage conversion module according to the discharge control signal; the voltage conversion module is used to convert the current voltage into a target discharge voltage according to the discharge drive signal; and output the target discharge voltage to the load, and the difference between the target discharge voltage and the preset discharge voltage belongs to a preset voltage difference range.

[0007] In one embodiment, the main control module is further used to obtain the charging voltage of the charging power supply when the voltage conversion module is electrically connected to the charging power supply, and send a charging control signal to the driving module according to a preset charging voltage and the charging voltage;

[0008] The driving module is further used to send a charging driving signal to the voltage conversion module according to the charging control signal; the voltage conversion module is further used to convert the charging voltage into a target charging voltage according to the charging driving signal; and output the target charging voltage to the energy storage module, and the difference between the target charging voltage and the preset charging voltage belongs to the preset voltage difference range.

[0009] In one embodiment, the battery further includes: an input / output terminal, the voltage conversion module is electrically connected to the load or the charging power source through the input / output terminal; the voltage conversion module includes: a charge / discharge unit, a first end of the charge / discharge unit is electrically connected to the positive electrode of the energy storage module, a second end of the charge / discharge unit is electrically connected to the positive electrode of the input / output terminal, a third end of the charge / discharge unit is electrically connected to the negative electrode of the energy storage module and the negative electrode of the input / output terminal, respectively, and a fourth end of the charge / discharge unit is electrically connected to the driving module;

[0010] The charge and discharge unit is used to convert the current voltage into the target discharge voltage according to the discharge driving signal; or to convert the charge voltage into the target charge voltage according to the discharge driving signal.

[0011] In one embodiment, the charging and discharging unit includes: a first inductor, a first switch tube, a second switch tube and a third switch tube; the first end of the first inductor is electrically connected to the positive electrode of the energy storage module, and the second end of the first inductor is electrically connected to the input end of the first switch tube and the output end of the second switch tube respectively;

[0012] The control end of the first switch tube is electrically connected to the driving module, and the output end of the first switch tube is electrically connected to the negative electrode of the energy storage module and the negative electrode of the input and output terminal respectively;

[0013] The control end of the second switch tube is electrically connected to the driving module, and the output end of the second switch tube is electrically connected to the input end of the third switch tube;

[0014] The control end of the third switch tube is electrically connected to the driving module, and the output end of the third switch tube is electrically connected to the positive electrode of the input-output terminal.

[0015] In one embodiment, the main control module includes: a voltage acquisition unit, a temperature acquisition unit, a current acquisition unit and a main control unit; the voltage acquisition unit, the temperature acquisition unit and the current acquisition unit are electrically connected to the main control unit respectively; the voltage acquisition unit is also connected in parallel to both ends of the positive electrode and the negative electrode of the energy storage module, and is used to collect the current voltage of the energy storage module; the current acquisition unit is also connected in series between the negative electrode of the energy storage module and the negative electrode of the input and output terminal, and is used to collect the current output current of the energy storage module;

[0016] The temperature acquisition unit is used to acquire the current temperature of the energy storage module; the main control unit is used to stop sending the discharge control signal or the charge control signal to the drive module when the current voltage, the current output current and / or the current temperature meet the preset protection conditions.

[0017] In one embodiment, the battery further includes a second inductor and a third inductor; the second inductor is connected in series between the output end of the third switch tube and the positive electrode of the input / output terminal; the third inductor is connected in series between the negative electrode of the energy storage module and the negative electrode of the input / output terminal.

[0018] In one embodiment, the energy storage module includes a plurality of battery cells connected in series, and the battery cells include sodium ion battery cells.

[0019] In a second aspect, the present invention provides a discharging method, applied to the battery according to the first aspect, the method comprising:

[0020] When the voltage conversion module is electrically connected to the load, the main control module obtains the current voltage of the energy storage module and sends a discharge control signal to the driving module according to the current voltage;

[0021] The driving module sends a discharge driving signal to the voltage conversion module according to the discharge control signal;

[0022] The voltage conversion module converts the current voltage into a target discharge voltage according to the discharge control signal; outputs the target discharge voltage to the load, and the difference between the target discharge voltage and the preset discharge voltage belongs to a preset voltage difference range.

[0023] In a third aspect, the present invention provides an electricity consumption system, comprising: a load and the battery described in the first aspect, wherein the battery is electrically connected to the load.

[0024] In a fourth aspect, the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program performs the discharge method described in the second aspect when executed by a processor.

[0025] The battery, discharge method, power system and medium provided by the embodiments of the present invention are as follows: when the voltage conversion module is electrically connected to the load, the main control module obtains the current voltage of the energy storage module, and sends a discharge control signal to the drive module according to the preset discharge voltage and the current voltage; the drive module sends a discharge drive signal to the voltage conversion module according to the discharge control signal; the voltage conversion module converts the current voltage into a target discharge voltage according to the discharge drive signal; and outputs the target discharge voltage to the load, wherein the difference between the target discharge voltage and the preset discharge voltage falls within the preset voltage difference range, thereby achieving the output of a stable voltage to the load and avoiding the adverse effect on the load kinetic energy caused by the reduction of battery power.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of the structure of a prior art battery is shown;

[0029] Figure 2 A schematic diagram of the structure of a battery provided by an embodiment of the present invention is shown;

[0030] Figure 3 Another schematic diagram of the structure of a battery provided by an embodiment of the present invention is shown;

[0031] Figure 4 Another structural schematic diagram of a battery provided by an embodiment of the present invention is shown;

[0032] Figure 5 Another structural schematic diagram of a battery provided by an embodiment of the present invention is shown;

[0033] Figure 6 A schematic diagram of a discharge method provided by an embodiment of the present invention is shown;

[0034] Figure 7 A schematic diagram of a charging method provided by an embodiment of the present invention is shown.

[0035] Description of main component symbols:

[0036] 110 - battery cell group; 111 - battery cell; 120 - input and output terminals; 130 - battery management system; 200 - battery; 210 - energy storage module; 220 - main control module; 221 - voltage acquisition unit; 222 - temperature acquisition unit; 223 - current acquisition unit; 224 - main control unit; 230 - drive module; 240 - voltage conversion module; 241 - charge and discharge unit. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of the template are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0040] Example 1

[0041] The batteries currently on the market mainly include lithium iron phosphate batteries, lithium manganese oxide batteries and sodium ion batteries. Among them, lithium iron phosphate batteries include multiple lithium iron phosphate cells connected in series, and the single operating range of lithium iron phosphate cells is 2.5V to 3.65V; lithium manganese oxide batteries include multiple lithium manganese oxide cells connected in series, and the single operating range of lithium manganese oxide cells is 2.7V to 4.2V; sodium ion batteries include multiple sodium ion cells connected in series, and the single operating range of sodium ion cells is 1.5V to 3.8V. In the prior art, the internal structure of the battery generally adopts a 16S1P structure, that is, 16 cells connected in series and 1 battery management system 130 (BMS). For details, please refer to Figure 1 , Figure 1A structural principle diagram of a battery of the prior art is shown, wherein a plurality of battery cells 111 are connected in series to form a battery cell group 110, the positive electrode of the battery cell group 110 is electrically connected to the positive electrode of the input / output terminal 120, the negative electrode of the battery cell group 110 is electrically connected to the negative electrode of the input / output terminal 120, and two back-to-back switch tubes are connected in series between the negative electrode of the battery cell group 110 and the negative electrode of the input / output terminal 120, and the control ends of the two back-to-back switch tubes are electrically connected to the battery management system 130 respectively, and the battery management system 130 is also electrically connected to the battery cell group 110. The battery management system 130 controls the on / off state of the two switch tubes so that the positive and negative electrodes of the battery cell group 110 are directly electrically connected to the input / output terminal 120, so that the battery cell group 110 supplies power to the outside through the input / output terminal 120.

[0042] It can be understood that if lithium iron phosphate cells are used, the battery voltage range is 40V~58.4V under the 16S1P structure; if lithium manganese oxide cells are used, the battery voltage range is 43.2V~67.2V under the 16S1P structure; if sodium ion cells are used, the battery voltage range is 24V~60.8V under the 16S1P structure. Obviously, the voltage range of sodium ion batteries is wider. If a battery with a wider voltage range is used to power electrical equipment, such as the drive motor of an electric vehicle, then when the battery is fully charged, the kinetic energy converted by the drive motor is large, and the riding speed of the electric vehicle is very fast. As the power decreases, the kinetic energy converted by the drive motor also decreases. And because the battery voltage range is wide, the kinetic energy of the electrical equipment varies greatly. A practical example is that when the battery is fully charged, the riding speed of the electric vehicle is very fast, and when the battery power is low, the riding speed becomes very slow. The change in battery power causes a large change in riding speed, which affects the user experience.

[0043] For this, see Figure 2 , Figure 2 A structural schematic diagram of a battery 200 provided by an embodiment of the present invention is shown, and the battery 200 includes: the energy storage module 210 is electrically connected to the main control module 220 and the voltage conversion module 240; the main control module 220 is also electrically connected to the driving module 230; the driving module 230 is also electrically connected to the voltage conversion module 240. When the voltage conversion module 240 is electrically connected to the load, the main control module 220 obtains the current voltage of the energy storage module 210, and sends a discharge control signal to the driving module 230 according to the preset discharge voltage and the current voltage; the driving module 230 sends a discharge drive signal to the voltage conversion module 240 according to the discharge control signal; the voltage conversion module 240 converts the current voltage into a target discharge voltage according to the discharge drive signal; and outputs the target discharge voltage to the load, and the difference between the target discharge voltage and the preset discharge voltage belongs to the preset voltage difference range.

[0044] In this embodiment, when the voltage conversion module 240 in the battery 200 is electrically connected to the load, the battery 200 supplies power to the load. Specifically, the voltage conversion module 240 includes a boost circuit composed of an inductor and a plurality of switch tubes. The main control module 220 sends a discharge control signal to the driving module 230 according to the current voltage and the preset discharge voltage. The driving module 230 determines the on and off time corresponding to each switch tube according to the discharge control signal, and sends a discharge drive signal to the corresponding switch tube according to the on and off time corresponding to each switch tube, so as to drive the corresponding switch tube to turn on or off, thereby enabling the voltage conversion module 240 to convert the current voltage into a target discharge voltage and output it to the load. It should be noted that the on and off time of each switch tube is determined by the main control module 220 according to the current voltage and the preset discharge voltage, wherein the preset discharge voltage is pre-stored in the main control module 220.

[0045] It can be understood that, for example, if the current voltage of the energy storage module 210 is 48V and the preset discharge voltage is 70V, the main control module 220 sends a discharge control signal to the drive module 230 according to the preset discharge voltage and the current voltage. The drive module 230 determines the corresponding on and off times of each switch tube in the voltage conversion module 240 according to the discharge control signal, and sends a discharge drive signal to the corresponding switch tube at the corresponding time to control each switch tube to be turned on or off at an appropriate time, so that the target discharge voltage finally output by the voltage conversion module 240 is approximately equal to the preset discharge voltage of 70V.

[0046] In one embodiment, the main control module 220 is further used to obtain the charging voltage of the charging power supply when the voltage conversion module 240 is electrically connected to the charging power supply, and send a charging control signal to the driving module 230 according to a preset charging voltage and the charging voltage;

[0047] The driving module 230 is also used to send a charging driving signal to the voltage conversion module 240 according to the charging control signal; the voltage conversion module 240 is also used to convert the charging voltage into a target charging voltage according to the charging driving signal; and output the target charging voltage to the energy storage module 210, and the difference between the target charging voltage and the preset charging voltage belongs to the preset voltage difference range.

[0048] In this embodiment, when the voltage conversion module 240 is electrically connected to the charging power supply, the battery 200 obtains electric energy from the charging power supply. Specifically, the voltage conversion module 240 includes a buck circuit composed of an inductor and a plurality of switch tubes. The main control module 220 sends a charging control signal to the driving module 230 according to the charging voltage of the charging power supply and the preset charging voltage. The driving module 230 determines the on and off time of each switch tube according to the charging control signal, and sends a charging drive signal to the corresponding switch tube according to the on and off time of each switch tube to control each switch tube to turn on or off at an appropriate time, so that the voltage conversion module 240 converts the charging voltage into a target charging voltage and outputs it to the energy storage module 210. It should be noted that the on and off time of each switch tube during the charging process is determined by the main control module 220 according to the charging voltage and the target charging voltage, wherein the preset charging voltage is pre-stored in the main control module 220. It can be understood that the main control module 220 determines the current voltage of the energy storage module 210 according to the voltage difference between the positive and negative ends of the energy storage module 210.

[0049] It should be noted that when the charging power source is electrically connected to the voltage conversion module 240 through the input / output terminal 120 , the charging power source also establishes communication with the main control module 220 , so that the main control module 220 obtains the charging voltage.

[0050] In one embodiment, see Figure 3 , the battery 200 further includes: an input-output terminal 120, the voltage conversion module 240 is electrically connected to the load or the charging power source through the input-output terminal 120; the voltage conversion module 240 includes: a charge-discharge unit 241, a first end of the charge-discharge unit 241 is electrically connected to the positive electrode of the energy storage module 210, a second end of the charge-discharge unit 241 is electrically connected to the positive electrode of the input-output terminal 120, a third end of the charge-discharge unit 241 is electrically connected to the negative electrode of the energy storage module 210 and the negative electrode of the input-output terminal 120, and a fourth end of the charge-discharge unit 241 is electrically connected to the driving module 230;

[0051] The charging and discharging unit 241 is used to convert the current voltage into the target discharging voltage and output it according to the discharging driving signal; or convert the charging voltage into the target charging voltage and output it according to the discharging driving signal.

[0052] In this embodiment, when a discharge drive signal is received, the charge-discharge unit 241 enters a discharge state, converts the current voltage input by the energy storage module 210 into a target discharge voltage, and then outputs it to the load through the input-output terminal 120. For example, the current voltage is 48V, and the charge-discharge unit 241 converts the current voltage 48V into a target discharge voltage, such as 70V, and then outputs it to the load. The charge-discharge unit 241 performs a voltage-boosting process on the current voltage so that the output voltage is always a constant voltage value, and also avoids the energy storage module 210 directly supplying power to the load, thereby avoiding the adverse effect of the change in the power of the energy storage module 210 on the kinetic energy of the load.

[0053] When receiving the charging drive signal, the charging and discharging unit 241 enters the charging state, converts the charging voltage input by the charging power supply through the input and output terminal 120 into the target charging voltage, and outputs it to the energy storage module 210, so that the energy storage module 210 is charged at a suitable voltage. For example, the charging voltage is 50V, and the charging and discharging unit 241 converts the charging voltage into the target charging voltage, such as 35V, and outputs it to the energy storage module 210. In the charging state, the charging and discharging unit 241 reduces the charging voltage so that the energy storage module 210 obtains electrical energy at a suitable voltage, thereby avoiding overvoltage damage to the energy storage module 210.

[0054] It can be understood that the reverse charging current during the discharge process or the charging process can be prevented by setting the second switch tube Q2 and the third switch tube Q3 in opposite directions. Specifically, during discharge, the reverse charging current is prevented by the diode in the second switch tube Q2, and during charging, the reverse charging current is prevented by the diode in the third switch tube Q3. In addition, since the conduction direction of the diode in the third switch tube Q3 is opposite to the flow direction of the discharge current, the discharge current can be completely blocked by turning off the third switch tube Q3; since the conduction direction of the diode in the second switch tube Q2 is opposite to the flow direction of the charging current, the charging current can be completely blocked by turning off the second switch tube Q2.

[0055] It should be noted that for some loads, such as motors, when the charge-discharge unit 241 stops outputting the target discharge voltage to the motor, the motor will generate a reverse voltage as it continues to rotate due to inertia. At this time, if the charge-discharge unit 241 is switched to a charging state, kinetic energy recovery can be achieved, thereby achieving the purpose of increasing the battery life of the battery 200. Specifically, the state switching of the charge-discharge unit 241 can be controlled by the main control module 220.

[0056] In one embodiment, see Figure 4, the charging and discharging unit 241 includes: a first inductor L1, a first switch tube Q1, a second switch tube Q2 and a third switch tube Q3; the first end of the first inductor L1 is electrically connected to the positive electrode of the energy storage module 210, and the second end of the first inductor L1 is electrically connected to the input end of the first switch tube Q1 and the output end of the second switch tube Q2 respectively;

[0057] The control end of the first switch tube Q1 is electrically connected to the driving module 230, and the output end of the first switch tube Q1 is electrically connected to the negative electrode of the energy storage module 210 and the negative electrode of the input-output terminal 120 respectively; the control end of the second switch tube is electrically connected to the driving module 230, and the output end of the second switch tube is electrically connected to the input end of the third switch tube; the control end of the third switch tube is electrically connected to the driving module 230, and the output end of the third switch tube is electrically connected to the positive electrode of the input-output terminal 120.

[0058] In this embodiment, when the charge-discharge unit 241 enters the discharge state, the first inductor L1, the first switch tube Q1, the second switch tube Q2 and the third switch tube Q3 constitute a boost circuit, and the current voltage input by the energy storage module 210 is boosted to obtain the target discharge voltage. Specifically, for the boost circuit, in the first stage, the driving module 230 drives the first switch tube Q1 to enter the on state, and the second switch tube Q2 and the third switch tube Q3 enter the off state. At this time, the current voltage is applied to both ends of the first inductor L1, and the first inductor L1 starts to charge; in the second stage, the driving module 230 drives the first switch tube Q1 to enter the off state, and the second switch tube Q2 and the third switch tube Q3 enter the on state. At this time, the voltage output to the load through the input-output terminal 120 = the voltage across the first inductor L1 + the current voltage of the energy storage module 210 = the target discharge voltage.

[0059] When the charge-discharge unit 241 enters the charging state, the first inductor L1, the first switch tube Q1, the second switch tube Q2 and the third switch tube Q3 form a buck circuit, which steps down the charging voltage input by the charging power supply to obtain the target charging voltage. Specifically, for the buck circuit, in the first stage, the driving module 230 drives the first switch tube Q1 to turn off, and the second switch tube Q2 and the third switch tube Q3 to turn on. At this time, the charging power supply is electrically connected to the first inductor L1 to charge the first inductor L1; in the second stage, the driving module 230 drives the first switch tube Q1 to turn on, and the second switch tube Q2 and the third switch tube Q3 are still turned on. At this time, the charging power supply is disconnected from the first inductor L1, and the first inductor L1 outputs the target charging voltage to the energy storage module 210.

[0060] It can be understood that the first switch tube Q1, the second switch tube Q2 and the third switch tube Q3 will frequently switch between the on state and the off state, so that the first inductor L1 is repeatedly charged and discharged to achieve the boost output target discharge voltage or the buck output target charge voltage.

[0061] It should be noted that for some loads, such as motors, during the discharge process, the charge and discharge unit 241 can be switched from the discharge state to the charging state through the control of the main control module 220, thereby realizing the switching of the boost circuit and the buck circuit, and then realizing kinetic energy recovery, thereby achieving the purpose of increasing the battery life of the battery 200.

[0062] In one embodiment, the main control module 220 includes: a voltage acquisition unit 221, a temperature acquisition unit 222, a current acquisition unit 223 and a main control unit 224; the voltage acquisition unit 221, the temperature acquisition unit 222 and the current acquisition unit 223 are electrically connected to the main control unit 224 respectively; the voltage acquisition unit 221 is also connected in parallel to both ends of the positive and negative electrodes of the energy storage module 210, and is used to collect the current voltage of the energy storage module 210; the current acquisition unit 223 is also connected in series between the negative electrode of the energy storage module 210 and the negative electrode of the input and output terminal 120, and is used to collect the current output current of the energy storage module 210; the temperature acquisition unit 222 is used to collect the current temperature of the energy storage module 210;

[0063] The main control unit 224 is configured to stop sending the discharge control signal or the charge control signal to the driving module 230 when the current voltage, the current output current and / or the current temperature meets a preset protection condition.

[0064] In this embodiment, in order to prevent the battery 200 from being damaged by overload or over-temperature, a voltage acquisition unit 221 is provided to monitor the voltage at both ends of the energy storage module 210, a temperature acquisition unit 222 is provided to monitor the battery temperature. The main control unit 224 determines whether to stop sending a discharge control signal or a charge control signal to the drive module 230 according to the current voltage, current output current and / or current temperature collected. Among them, the preset protection conditions include: current temperature ≥ preset temperature threshold, current current ≥ preset current threshold and / or current temperature ≥ preset temperature threshold, which can be set according to the needs, which is only used as an example here without limitation.

[0065] In one embodiment, see again Figure 5The battery 200 also includes a second inductor and a third inductor; the second inductor is connected in series between the output end of the second switch tube and the positive electrode of the input-output terminal 120; the third inductor is connected in series between the negative electrode of the energy storage module 210 and the negative electrode of the input-output terminal 120.

[0066] In this embodiment, when the load electrically connected to the battery 200 is started or shut down, it is easy to cause a large peak current to be generated at the output port of the battery 200, thereby causing damage to the load and the battery 200. By connecting an inductor in series with the positive and negative poles of the input and output terminals 120 respectively, the peak current is filtered out to protect the battery 200 and the load.

[0067] In one embodiment, the energy storage module 210 includes a plurality of battery cells 111 connected in series, and the battery cells 111 include sodium ion battery cells.

[0068] The energy storage module 210 includes: Figure 1 The multiple battery cells 111 connected in series are shown, and the battery cells 111 include sodium ion battery cells. It should be noted that, in other embodiments, the multiple battery cells 111 connected in series may also be other different types of battery cells with a larger voltage range.

[0069] A battery provided by an embodiment of the present invention comprises an energy storage module, a main control module, a driving module and a voltage conversion module; the energy storage module is electrically connected to the main control module and the voltage conversion module; the main control module is also electrically connected to the driving module; the driving module is also electrically connected to the voltage conversion module; the present invention is that when the voltage conversion module is electrically connected to a load, the main control module obtains the current voltage of the energy storage module, and sends a discharge control signal to the driving module according to a preset discharge voltage and the current voltage; the driving module sends a discharge drive signal to the voltage conversion module according to the discharge control signal; the voltage conversion module converts the current voltage into a target discharge voltage according to the discharge drive signal; the target discharge voltage is output to the load, and the difference between the target discharge voltage and the preset discharge voltage belongs to the preset voltage difference range, thereby achieving the output of a stable voltage to the load and avoiding the adverse effect on the load kinetic energy caused by the reduction of battery power.

[0070] Example 2

[0071] See also Figure 6 The embodiment of the present invention further provides a discharging method, which is applied to the battery described in Embodiment 1, and the method includes steps S610-S630.

[0072] S610, when the voltage conversion module is electrically connected to the load, the main control module obtains the current voltage of the energy storage module, and sends a discharge control signal to the driving module according to the current voltage;

[0073] S620, the driving module sends a discharge driving signal to the voltage conversion module according to the discharge control signal;

[0074] S630, the voltage conversion module converts the current voltage into a target discharge voltage according to the discharge control signal; outputs the target discharge voltage to the load, and the difference between the target discharge voltage and the preset discharge voltage belongs to a preset voltage difference range.

[0075] The discharge method provided by the embodiment of the present invention is as follows: when the voltage conversion module is electrically connected to the load, the main control module obtains the current voltage of the energy storage module, and sends a discharge control signal to the drive module according to the preset discharge voltage and the current voltage; the drive module sends a discharge drive signal to the voltage conversion module according to the discharge control signal; the voltage conversion module converts the current voltage into a target discharge voltage according to the discharge drive signal; and outputs the target discharge voltage to the load, wherein the difference between the target discharge voltage and the preset discharge voltage belongs to the preset voltage difference range, thereby achieving the output of a stable voltage to the load and avoiding the adverse effect on the load kinetic energy caused by the reduction of battery power.

[0076] It can be understood that the discharge method provided in the embodiment of the present invention is applied to the battery provided in Example 1, and will not be described again here to avoid repetition.

[0077] In addition, an embodiment of the present invention further provides an electric power system, including a load and the battery described in embodiment 1, specifically, the battery is electrically connected to the load. The electric power system can implement the discharge method provided in the embodiment of the present invention, which will not be described here to avoid repetition.

[0078] Example 3

[0079] Also, see Figure 7 The embodiment of the present invention further provides a charging method, which is also applied to the battery described in Example 1. The charging method includes: steps S710-S730.

[0080] Step S710, when the voltage conversion module is electrically connected to the charging power source, the main control module obtains the charging voltage of the charging power source, and sends a charging control signal to the driving module according to the preset charging voltage and the charging voltage;

[0081] Step S720, the driving module sends a charging driving signal to the voltage conversion module according to the charging control signal;

[0082] Step S730: the voltage conversion module converts the charging voltage into a target charging voltage according to the charging drive signal; outputs the target charging voltage to the energy storage module, and the difference between the target charging voltage and the preset charging voltage belongs to the preset voltage difference range.

[0083] The charging method provided in the embodiment of the present invention converts the charging voltage into a target charging voltage through a voltage conversion module, thereby achieving voltage reduction processing on the charging voltage and avoiding overvoltage damage to the battery.

[0084] In addition, an embodiment of the present invention further provides a charging system, including a charging power source and the battery described in embodiment 1, specifically, the battery is electrically connected to the charging power source. The charging system can implement the charging method provided in the embodiment of the present invention, which will not be described here to avoid repetition.

[0085] Example 4

[0086] In addition, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the discharge method provided in Embodiment 2 is implemented.

[0087] In this embodiment, the computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0088] The computer-readable storage medium provided in this embodiment can implement the discharge method provided in Embodiment 2, and will not be described again here to avoid repetition.

[0089] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.

[0090] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0091] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A battery, characterized in that: include: Energy storage module, main control module, drive module and voltage conversion module; The energy storage module is electrically connected to the main control module and the voltage conversion module; The main control module is also electrically connected to the driving module; The driving module is also electrically connected to the voltage conversion module; The main control module is used to obtain the current voltage of the energy storage module when the voltage conversion module is electrically connected to the load, and send a discharge control signal to the driving module according to a preset discharge voltage and the current voltage; The driving module is used to send a discharge driving signal to the voltage conversion module according to the discharge control signal; The voltage conversion module is used to convert the current voltage into a target discharge voltage according to the discharge driving signal; The target discharge voltage is output to the load, and a difference between the target discharge voltage and the preset discharge voltage belongs to a preset voltage difference range.

2. The battery according to claim 1, characterized in that The main control module is further used to obtain the charging voltage of the charging power supply when the voltage conversion module is electrically connected to the charging power supply, and send a charging control signal to the driving module according to a preset charging voltage and the charging voltage; The driving module is further used to send a charging driving signal to the voltage conversion module according to the charging control signal; The voltage conversion module is further used to convert the charging voltage into a target charging voltage according to the charging drive signal; output the target charging voltage to the energy storage module, and the difference between the target charging voltage and the preset charging voltage belongs to the preset voltage difference range.

3. The battery according to claim 2, characterized in that The battery further includes: an input / output terminal, through which the voltage conversion module is electrically connected to the load or the charging power source; the voltage conversion module includes: a charge / discharge unit, a first end of the charge / discharge unit is electrically connected to the positive electrode of the energy storage module, a second end of the charge / discharge unit is electrically connected to the positive electrode of the input / output terminal, a third end of the charge / discharge unit is electrically connected to the negative electrode of the energy storage module and the negative electrode of the input / output terminal, respectively, and a fourth end of the charge / discharge unit is electrically connected to the driving module; The charge and discharge unit is used to convert the current voltage into the target discharge voltage according to the discharge driving signal; or to convert the charge voltage into the target charge voltage according to the discharge driving signal.

4. The battery according to claim 3, characterized in that The charging and discharging unit includes: a first inductor, a first switch tube, a second switch tube and a third switch tube; The first end of the first inductor is electrically connected to the positive electrode of the energy storage module, and the second end of the first inductor is electrically connected to the input end of the first switch tube and the output end of the second switch tube respectively; The control end of the first switch tube is electrically connected to the driving module, and the output end of the first switch tube is electrically connected to the negative electrode of the energy storage module and the negative electrode of the input and output terminal respectively; The control end of the second switch tube is electrically connected to the driving module, and the output end of the second switch tube is electrically connected to the input end of the third switch tube; The control end of the third switch tube is electrically connected to the driving module, and the output end of the third switch tube is electrically connected to the positive electrode of the input-output terminal.

5. The battery according to claim 4, characterized in that The main control module includes: a voltage acquisition unit, a temperature acquisition unit, a current acquisition unit and a main control unit; The voltage acquisition unit, the temperature acquisition unit and the current acquisition unit are electrically connected to the main control unit respectively; The voltage collection unit is also connected in parallel to both ends of the positive electrode and the negative electrode of the energy storage module, and is used to collect the current voltage of the energy storage module; The current collection unit is also connected in series between the negative electrode of the energy storage module and the negative electrode of the input and output terminal, and is used to collect the current output current of the energy storage module; The temperature acquisition unit is used to acquire the current temperature of the energy storage module; The main control unit is used to stop sending the discharge control signal or the charge control signal to the driving module when the current voltage, the current output current and / or the current temperature meets a preset protection condition.

6. The battery according to claim 5, characterized in that The battery also includes a second inductor and a third inductor; The second inductor is connected in series between the output end of the third switch tube and the positive electrode of the input-output terminal; The third inductor is connected in series between the negative electrode of the energy storage module and the negative electrode of the input / output terminal.

7. The battery according to any one of claims 1 to 6, characterized in that The energy storage module includes a plurality of battery cells connected in series, and the battery cells include sodium ion battery cells.

8. A discharge method, characterized in that: The method for the battery according to any one of claims 1 to 7 comprises: When the voltage conversion module is electrically connected to the load, the main control module obtains the current voltage of the energy storage module and sends a discharge control signal to the driving module according to the current voltage; The driving module sends a discharge driving signal to the voltage conversion module according to the discharge control signal; The voltage conversion module converts the current voltage into a target discharge voltage according to the discharge control signal; outputs the target discharge voltage to the load, and the difference between the target discharge voltage and the preset discharge voltage belongs to a preset voltage difference range.

9. An electricity system, characterized in that: The system comprises: a load and the battery according to any one of claims 1 to 7, wherein the battery is electrically connected to the load.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the discharge method of claim 8 is implemented.

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