CN120637695A

CN120637695A - Energy storage power supply, heating method and storage medium

Info

Publication number: CN120637695A
Application number: CN202510791947.7A
Authority: CN
Inventors: 付兆彬; 陈勇军; 沈高松
Original assignee: Shenzhen Hello Tech Energy Co Ltd
Current assignee: Shenzhen Hello Tech Energy Co Ltd
Priority date: 2025-06-13
Filing date: 2025-06-13
Publication date: 2025-09-12

Abstract

The present invention discloses an energy storage power supply, a heating method and a storage medium. The energy storage power supply includes a battery module, a coil, an inverter, an output port and a switch. The battery module includes a plurality of battery cells. The battery cells include a conductive shell. The inverter can be electrically connected to the battery module to convert the direct current of the battery module into alternating current. The coil can be electrically connected to the inverter and can circulate alternating current to generate an alternating magnetic field. The conductive shell is at least partially located in the alternating magnetic field. The output port can be electrically connected to the inverter and output alternating current to the outside. The switch can selectively electrically connect the inverter to the coil or the output port. The inverter can supply alternating current to the coil so that the coil generates an alternating magnetic field and the conductive shell cuts the magnetic flux lines of the alternating magnetic field, thereby directly converting electrical energy into thermal energy on the conductive shell. Its heat transfer path only includes the conductive shell and the inside of the battery cell, so the heat conversion rate is higher, the heating loss is less, and the heating efficiency is also higher.

Description

Energy storage power supply, heating method and storage medium

Technical Field

The present invention relates to the field of energy storage technology, and in particular, to an energy storage power supply, a heating method, and a non-volatile computer readable storage medium containing a computer program.

Background

When the battery pack is operated in a low temperature environment (e.g., an environment with an ambient temperature of less than-10 degrees celsius (°c), etc.), the low temperature affects the thermodynamic and kinetic properties of the electrochemical system, resulting in reduced performance, increased safety risk, and reduced life of the lithium battery pack.

At present, although the battery pack can be heated by providing a heating film to improve the performance of the battery pack in a low-temperature environment, the heating efficiency is low because the surfaces of the heating film and the battery pack are often difficult to be completely and tightly adhered.

Disclosure of Invention

The embodiment of the invention provides an energy storage power supply, a heating method and a storage medium, which aim to solve at least one technical problem.

In a first aspect, an embodiment of the present application provides an energy storage power supply, including:

the battery module comprises a plurality of battery cells, wherein each battery cell comprises a conductive shell;

The inverter is electrically connected with the battery module to convert direct current of the battery module into alternating current;

A coil electrically connectable to the inverter and capable of circulating an alternating current to generate an alternating magnetic field, the conductive housing being at least partially within the alternating magnetic field;

The output port can be electrically connected with the inverter and outputs alternating current to the outside;

A switch selectively electrically connects the inverter with the coil or the output port.

In a second aspect, an embodiment of the present application provides a heating method, the heating method being used for an energy storage power supply, the energy storage power supply including a battery module, an inverter, a coil, an output port and a switch, the battery module including a plurality of battery cells, the battery cells including a conductive housing, the inverter being electrically connected to the battery module to convert direct current of the battery module into alternating current, the coil being electrically connectable to the inverter and capable of circulating alternating current to generate an alternating magnetic field, the conductive housing being at least partially located in the alternating magnetic field, the output port being electrically connectable to the inverter and outputting alternating current to the outside, the switch selectively electrically connecting the inverter to the coil or the output port, the method comprising:

The coil is controlled to be turned on or off based on the temperature of the conductive housing.

In a third aspect, an embodiment of the present application proposes a non-transitory computer-readable storage medium containing a computer program, which when executed by a processor causes the processor to perform the heating method according to any one of the embodiments described above.

The energy storage power supply comprises a battery module, a coil, an inverter, an output port and a switch, wherein the battery module comprises a plurality of battery cells, the battery cells comprise a conductive shell, the inverter can be electrically connected with the battery module to convert direct current of the battery module into alternating current, the coil can be electrically connected with the inverter and can be used for circulating the alternating current to generate an alternating magnetic field, the conductive shell is at least partially positioned in the alternating magnetic field, and the conductive shell can cut magnetic induction lines of the alternating magnetic field to convert the electric energy into heat energy so that the conductive shell is heated up rapidly and further heat the battery cells. The output port can be electrically connected with the inverter and externally output alternating current, the switch can be used for selectively electrically connecting the inverter with the coil or the output port, the inverter can be used for converting direct current of the battery module into alternating current and providing the alternating current for external electric equipment through the output port, the alternating current can be supplied to the coil, so that the coil generates an alternating magnetic field, the conductive shell cuts a magnetic induction line of the alternating magnetic field, the electric energy can be directly converted into heat energy on the conductive shell, the heat transfer path only comprises the conductive shell and the inside of the battery cell, the heat conversion rate is higher, the heating loss is less, and the heating efficiency is higher. In other words, when the lead shell cuts the magnetic induction wire, heat is generated in the shell of the conductive shell and is transferred inwards, so that the heating speed can be further ensured, the heating efficiency is improved, and the performance degradation, the safety risk increase, the service life decay and the like of the battery module are avoided.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

Fig. 1 is a schematic diagram of an application scenario of an energy storage power supply according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a scenario in which a coil of an energy storage power supply of an embodiment of the present invention generates an alternating magnetic field;

FIG. 3 is a schematic diagram of a scenario of an energy storage power supply according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a scenario of an energy storage power supply according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a scenario of an energy storage power supply according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a scenario of an energy storage power supply according to an embodiment of the present invention;

FIG. 7 is a schematic flow diagram of an energy storage power supply according to an embodiment of the invention;

FIG. 8 is a schematic flow diagram of an energy storage power supply according to an embodiment of the invention;

FIG. 9 is a schematic flow diagram of an energy storage power supply according to an embodiment of the invention;

FIG. 10 is a schematic flow diagram of an energy storage power supply according to an embodiment of the present invention;

FIG. 11 is a schematic block diagram of a heating apparatus according to some embodiments of the present application;

FIG. 12 is a schematic diagram of the connection state of a non-transitory computer readable storage medium and a processor of some embodiments of the application.

Reference numerals for main elements:

100. energy storage power supply 10, battery module 11, battery cell 12, conductive shell 20, coil 30, thermistor 40, inverter 50, control panel

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, as well as, for example, fixedly coupled, detachably coupled, or integrally coupled, unless otherwise specifically indicated and defined. It may be a mechanical connection that is made, or may be an electrical connection. Can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The disclosure herein provides many different embodiments or examples for implementing different structures of the invention. To simplify the present disclosure, components and arrangements of specific examples are described herein. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

When a battery (e.g., a lithium battery, etc.) is operated in a low temperature environment (e.g., an environment having an ambient temperature of less than-10 degrees celsius (°c), or another example, an environment having an ambient temperature of less than 0 ℃) the low temperature affects the thermodynamic and kinetic properties of the electrochemical system, resulting in disadvantages such as reduced performance, increased safety risk, and reduced life of the lithium battery. For example, lithium batteries can attenuate available capacity by around 70% at-10 ℃ and even more than 50% at-20 ℃. This is because in a low temperature environment, the viscosity of the electrolyte of the battery is generally significantly increased, resulting in a great decrease in the ionic conduction rate, a hindered electrochemical reaction kinetics, and a decrease in the diffusion coefficient of lithium ions in the electrode active material, so that the electrochemical reaction cannot be sufficiently performed, thereby resulting in a decrease in the usable capacity of the battery. For example, when the battery is charged in a low-temperature environment, lithium ions are liable to dendrite on the surface of the negative electrode, so that the charging efficiency is affected, and the separator is possibly stabbed, so that the risk of short circuit in the battery is increased and the service life of the battery is accelerated.

For example, in a scheme of providing a heating film to heat a cylindrical battery pack, by attaching the heating film to the positive and negative electrodes of the battery cells or winding the heating film around the cylindrical surface of the battery cells, the heating film heats and transfers heat to the battery cells, which has low heat transfer efficiency, long heating time, for example, heating the battery pack from-20 ℃ to the operating temperature of the battery pack, usually requires 30 minutes to 60 minutes or even longer, and low heating efficiency due to difficulty in completely and tightly attaching the surfaces of the heating film and the battery pack.

In view of this, the present application provides an energy storage power supply 100, please refer to fig. 1 and fig. 2, and fig. 1 is a schematic diagram of an application scenario of the energy storage power supply 100 of the present application. The energy storage power supply 100 includes:

The battery module comprises a plurality of battery cells, and each battery cell comprises a conductive shell;

The coil can be electrically connected with the inverter and can circulate alternating current so as to generate an alternating magnetic field, and the conductive shell is at least partially positioned in the alternating magnetic field;

a switch, the switch selectively electrically connecting the inverter with the coil or the output port.

Wherein the battery module 10 may be obtained by connecting a plurality of battery cells 11 in series and/or in parallel.

Each battery cell 11 is provided with a conductive housing 12 (for example, a 18650 type steel-shell battery cell 11 may be used), the conductive housing 12 may encapsulate the battery cell 11 and bear external stress, and the conductive housing 12 may be any conductive housing such as a stainless steel housing, a carbon steel housing, an iron housing, and the like.

The inverter 40 is used for converting direct current output by the battery module 10 into alternating current, and the inverter 40 can also adjust the power of the alternating current input into the coil 20 by adjusting the duty ratio (Pulse Width Modulation, PWM).

Alternatively, the switch may be at least one of a relay, a thyristor, and an insulated gate bipolar transistor.

The relay is an electric switch working based on electromagnetic principle, and mainly comprises an electromagnet, a movable contact and a stationary contact, when current passes through the electromagnet, a magnetic field is generated to attract the movable contact to contact with the stationary contact, so that the switching action of the circuit is completed.

Among them, thyristors (Silicon Controlled Rectifier, SCR) can control the flow of current, showing significant advantages in switching operation. The thyristor has four layers of semiconductor material and typically has three electrodes, an anode, a cathode and a gate, and when the gate receives a trigger signal, the thyristor will begin to conduct until the current is cut off.

The insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT) has high input impedance and high current carrying capacity of the bipolar transistor, so that the insulated gate bipolar transistor can be rapidly switched under low voltage and can keep low conduction loss under high current.

By arranging the switch, the on-off of the electric connection between the inverter and the coil or between the inverter and the output port can be controlled.

Optionally, the stored energy power supply 100 further includes a thermistor 30 (Positive Temperature Coefficient thermistor, PTC thermistor), the thermistor 30 being disposed on at least one of the battery cells 11 to obtain the temperature of the conductive housing 12. For example, each of the battery cells 11 has a thermistor 30 provided on the surface thereof, and for example, the battery module 10 includes a plurality of groups, each group of the battery modules 10 having 1 thermistor 30 provided thereon.

Specifically, the energy storage power supply 100 includes a battery module 10 and a coil 20, the battery module 10 may be formed by connecting a plurality of battery cells 11 in series and/or parallel, the battery cells 11 may include a conductive housing 12, referring to fig. 2, when alternating current is supplied to the coil 20, a high-frequency alternating magnetic field is generated around the coil 20 (the direction and strength of the magnetic field will be periodically changed along with the current frequency), when at least part of the conductive housing 12 is located in the alternating magnetic field, the conductive housing 12 will cut magnetic induction lines, according to faraday's law of electromagnetic induction, the conductive housing 12 will generate induced electromotive force, the induced electromotive force drives inside the conductive housing 12 to form a closed current loop to form an eddy current, the eddy current is in a vortex-like distribution, the direction is determined by lenz law (the magnetic field of the induced current always hinders the change of the original magnetic field), when the eddy current flows in the conductive housing 12, due to the resistance of the conductive housing 12 itself, the electrical energy will be converted into heat energy according to joule law, so that the conductive housing 12 will rapidly heat up, and further heat the battery cells 11.

The coil 20 generates an alternating magnetic field, the conductive shell 12 cuts the magnetic induction line of the alternating magnetic field, and the electric energy can be directly converted into the heat energy on the conductive shell 12, and the heat transfer path only comprises the conductive shell 12 and the inside of the battery cell 11. For example, compared with the scheme of arranging heating films at the positive electrode and the negative electrode of the battery cell, the embodiment of the application has the advantages that the consumed energy is reduced by 30% at least than that of the heating film mode under the condition of reaching the same temperature rising target, and the energy is more energy-saving and efficient.

The power supply input end of the inverter 40 is connected with the battery module 10, the power supply output end can comprise a first pole and a second pole, the first pole and the second pole are respectively connected with two ends of the coil 20, direct current output by the battery module 10 can be converted into alternating current through the inverter 40 and transmitted to the coil 20, so that the coil 20 generates an alternating magnetic field, the battery module 10 supplies power for the coil 20, and production cost can be saved.

It can be understood that referring to fig. 6, the inverter 40 may be time-division multiplexed into a power interface of a Battery management system (Battery MANAGEMENT SYSTEM, BMS), that is, a power supply output end of the inverter 40 may also be connected to an output port, the output port is connected to an external electric device, and the Battery module 10 may supply power to the outside through the inverter 40, so as to reduce hardware cost.

Referring to fig. 3, optionally, the coil 20 includes a wire wound in at least one of a loop, a spiral, and a loop.

Wherein the lead wire comprises a conductive wire and an insulating housing, which cooperate to realize the electromagnetic function of the coil 20 and the safety isolation between the coil 20 and the battery module 10.

The conductive wire can be made of high-conductivity metal (such as copper and aluminum) to ensure low eddy current loss and high magnetic field excitation efficiency, and the insulating shell can be made of polyester paint, polyurethane paint or silicon rubber to provide electrical isolation.

For example, the wire may be looped around any point, or the wire may extend along a central axis and be wound in a spiral shape, or referring to fig. 4, fig. 4 is a top view of the stored energy power supply 100, and the wire may be wound in a zigzag shape. After the lead wire is wound into at least one shape of a ring shape, a spiral shape and a zigzag shape, the density and uniformity of the alternating magnetic field generated by the coil 20 can be improved, and the alternating magnetic field can be ensured to uniformly cover the battery module 10, so that the heating efficiency and the heating effect are improved.

Alternatively, the routing direction of the coil 20 is perpendicular to the height direction of the battery cell 11.

Referring to fig. 1, the routing direction of the coil 20 is perpendicular to the height direction of the battery cell 11, the variation of the magnetic flux is maximized, the generated induced electromotive force is ensured to be maximized, the eddy current is enhanced, and the heating efficiency is further improved.

Optionally, the stored energy power source 100 further comprises a mounting plate on which the coil 20 is disposed.

Alternatively, the battery modules 10 include a plurality of battery modules 10 stacked with each other, and the coil 20 is provided between any two adjacent and stacked battery modules 10.

The mounting plate provides support for the coil 20, and the coil 20 can be fixedly connected with the mounting plate in a clamping, bolt or bonding process mode, so as to avoid magnetic field deflection.

Wherein, a plurality of battery modules 10 are stacked along the vertical direction and are arranged, coils 20 are arranged between any two adjacent battery modules 10 which are stacked, so that the magnetic field superposition of the vertical direction can be formed, the conductive shells 12 of all battery cells 11 can be in the strong magnetic field region, and the heating effect is ensured.

It can be appreciated that in the heating process of the battery module 10, if the temperature rising speeds of the battery cells 11 in the battery module 10 during heating are different, the temperature difference between the battery cells 11 is too large, which may cause the problems of overheating of half of the battery cells, failure of the internal structure, and the like of the battery module 10, and increase the use risk of the battery module 10. The alternating magnetic field generated by the alternating-current conducting wire is dense and uniform when the alternating-current conducting wire circulates in a shape like a Chinese character 'hui', the whole conductive shell 12 can be positioned in the alternating magnetic field, and the strength of the alternating-current conducting wire when cut by different positions of each conductive shell 12 is consistent, so that each battery cell 11 can keep almost the same temperature rising speed, namely, homogeneous heating is realized on the battery cells 11 arranged at different positions and different positions of the same battery cell 11, and heat is generated in the shell of the conductive shell 12 and then is transferred inwards when the conductive shell cuts the alternating-current conducting wire, so that the heating speed can be ensured.

In this way, the energy storage power supply 100 includes the battery module 10, the coil 20, the inverter 40, the output port and the switch, the battery module 10 includes a plurality of battery cells 11, the battery cells 11 include the conductive shell 12, the inverter 40 can be electrically connected with the battery module 10 to convert the direct current of the battery module 10 into alternating current, the coil 20 can be electrically connected with the inverter 40 and can circulate the alternating current to generate the alternating magnetic field, the conductive shell 12 is at least partially located in the alternating magnetic field, the conductive shell 12 can cut the magnetic induction line of the alternating magnetic field, convert the electric energy into heat energy, so that the conductive shell 12 is heated up fast, and then the battery cells 11 are heated. The output port can be electrically connected with the inverter 40 and externally output alternating current, the switch can selectively electrically connect the inverter 40 with the coil 20 or the output port, the inverter 40 can convert direct current of the battery module 10 into alternating current and provide alternating current for external electric equipment through the output port, and the alternating current can be supplied to the coil 20, so that the coil 20 generates an alternating magnetic field, the conductive shell 12 cuts a magnetic induction line of the alternating magnetic field, and the electric energy can be directly converted into heat energy on the conductive shell 12, and the heat transfer path only comprises the conductive shell 12 and the inside of the battery cell 11, so that the heat conversion rate is higher, the heating loss is less, and the heating efficiency is higher. In other words, since heat is generated inside the case of the conductive case 12 and then is transferred inward when the conductive case cuts the magnetic induction wire, the heating speed can be further ensured, and the battery module 10 is prevented from being degraded, increased in safety risk, and reduced in life.

Referring to fig. 5 and 6, in some embodiments, the energy storage power supply 100 further includes a controller, which may be a microcomputer chip (Microcontroller Unit, MCU) (a microcomputer chip integrating multiple functions such as a Central Processing Unit (CPU), a memory, an input/output (I/O) interface, etc.), a Digital signal processor (Digital SignalProcessor, DSP) (a controller for Digital signal processing), etc. The controller, inverter 40, and Battery management system (Battery MANAGEMENT SYSTEM, BMS) may be integrated as the control board 50 of the energy storage power supply 100. For example, referring to fig. 5, the battery module 10 may supply power to the control board 50, the thermistor 30 feeds back the collected temperature to the control board 50, and the control board 50 controls the inverter 40 to output ac power to the coil 20, thereby heating the battery module 10.

In some embodiments, the energy storage power supply 100 further includes a heating battery, and the power supply input terminal of the inverter 40 is connected to the heating battery, and two ends of the coil 20 are connected to the power supply output terminal of the inverter 40.

The heating battery may be a battery having a suitable operating temperature less than or equal to the suitable operating temperature of the battery module 10.

Specifically, through the additional heating battery that sets up, by heating battery for coil 20 power supply, avoid battery module 10 low temperature charge-discharge damage, further improve energy storage power 100's security and reliability.

Referring to fig. 7, an embodiment of the present application further provides a heating method, which may be used for the energy storage power supply 100 according to any of the foregoing embodiments, where the heating method includes:

step 011, controlling the coil 20 to be turned on or off based on the temperature of the conductive housing 12.

Specifically, the temperature of the conductive housing 12 may be monitored by the thermistor 30 to determine the temperature of the battery cell 11. When the coil 20 is powered by alternating current, the conductive housing 12 cuts the induction wire to generate self-heat, and when the coil 20 is not powered by alternating current, the conductive housing 12 stops generating heat, so that the coil 20 can be controlled to be turned on or off according to the temperature of the conductive housing 12.

Referring to fig. 8, optionally, step 011, controlling the coil 20 to be turned on or off based on the temperature of the conductive housing 12, includes:

step 0111, controlling the coil 20 to be conducted under the condition that the temperature of the conductive shell 12 is smaller than a first preset temperature;

step 0112, when the temperature of the conductive housing 12 is greater than a first preset temperature and less than a second preset temperature, controlling the coil 20 to be conducted at a preset frequency, or reducing at least one of current, power and alternating current frequency when the coil 20 is conducted, wherein the first preset temperature and the second preset temperature are determined based on the working temperature of the battery cell 11, and the second preset temperature is greater than the first preset temperature;

Step 0113, controlling the coil 20 to be disconnected in case the temperature of the conductive housing 12 is greater than a second preset temperature threshold.

Wherein the first preset temperature and the second preset temperature are determined based on the operating temperature of the battery cell 11, for example, the first preset temperature is greater than or equal to the lowest temperature of the suitable operating temperature range of the battery cell 11, the second preset temperature is less than or equal to the highest temperature of the suitable operating temperature range of the battery cell 11, for example, the operating temperature range of the battery cell 11 is [20 ℃,35 ℃, the first preset temperature may be 20 ℃, and the second preset temperature may be 35 ℃.

Specifically, in the case where the temperature of the conductive housing 12 is less than the first preset temperature, the conductive housing 12 may be heated by controlling the coil 20 to be turned on so as to rapidly heat the battery cell 11. In the case where the coil 20 is supplied with alternating current, since the direction and intensity of the alternating magnetic field generated by the coil 20 are periodically changed according to the frequency (or magnitude) of the current flowing in the coil 20, for example, the higher the current frequency is, the faster the magnetic field change rate of the alternating magnetic field is, the higher the intensity of the eddy current is, and the higher the heat generating efficiency of the conductive housing 12 is, so that the temperature raising rate of the conductive housing 12 is higher. Therefore, when the temperature of the conductive housing 12 is greater than the first preset temperature and less than the second preset temperature, at least one of the current, the power and the ac frequency when the coil 20 is turned on can be reduced, or the on-off of the coil 20 can be controlled according to the preset frequency, so as to reduce the temperature rising rate of the conductive housing 12, so that the conductive housing 12 can keep constant temperature, i.e. heat the inside of the battery cell 11 at constant temperature, to further improve the stability of the system, and when the temperature of the conductive housing 12 is greater than the second preset temperature threshold, the coil 20 can be controlled to be turned off in order to avoid overheating of the battery cell 11.

Referring to fig. 9, optionally, step 0113 of controlling the coil 20 to be turned off in the case that the temperature of the conductive housing 12 is greater than the second preset temperature threshold comprises:

step 01131, determining that heating is complete if the duration of the coil 20 disconnection reaches a preset duration and the temperature of the conductive housing 12 matches a second preset temperature threshold.

The preset duration may be, for example, 2 minutes (min), 3min, 4min, etc.

Specifically, after the coil 20 is powered off, the conductive housing 12 performs heat transfer to the inside of the battery cell 11, so that the temperature of the conductive housing 12 is reduced, if the duration of the disconnection of the coil 20 reaches the preset duration, if the temperature of the conductive housing 12 matches the second preset temperature threshold (for example, the temperature of the conductive housing 12 is still the second preset temperature threshold, or the temperature difference between the temperature of the conductive housing 12 and the second preset temperature threshold is smaller than the preset temperature difference, etc.), the temperature of the inside of the battery cell 11 and the temperature of the conductive housing 12 can be considered to be consistent, the heating target is reached, and it can be determined that the heating is completed.

Referring to fig. 10, optionally, the energy storage power source 100 further includes an inverter 40, the inverter 40 is configured to convert direct current output by the battery cell 11 into alternating current, and the method further includes:

step 012, in the case where it is determined that the heating is completed, the battery module 10 is controlled to discharge through the inverter 40.

Specifically, after it is determined that the heating is completed, the battery module 10 may be charged and discharged, and the heating process is not performed simultaneously with the discharging process of the battery module 10, so that the safety of the charging and discharging may be further improved.

Thus, by controlling the on or off of the coil 20 based on the temperature of the conductive housing 12, precise control of heating is achieved, ensuring the stability of the energy storage power supply 100.

Referring to fig. 11, in order to better implement the signal processing method according to the embodiment of the present application, the embodiment of the present application further provides a heating device 300, where the heating device 300 is used for an energy storage power supply 100, the energy storage power supply 100 includes a battery module 10, the battery module 10 includes a plurality of battery cells 11, the battery cells 11 include a conductive housing 12, an inverter 40 electrically connected to the battery module 10 to convert direct current of the battery module 10 into alternating current, a coil 20 electrically connected to the inverter 40 and capable of circulating alternating current to generate an alternating magnetic field, an output port electrically connected to the inverter and outputting alternating current, and a switch selectively electrically connecting the inverter to the coil or the output port, where the control module 301 is used for controlling the on or off of the coil based on the temperature of the conductive housing.

The apparatus has been described above in connection with the accompanying drawings from the perspective of functional modules, which may be implemented in hardware, or in instructions in software, or in a combination of hardware and software modules. Specifically, each step of the method embodiment in the embodiment of the present application may be implemented by an integrated logic circuit of hardware in a processor and/or an instruction in software form, and the steps of the method disclosed in connection with the embodiment of the present application may be directly implemented as a hardware encoding processor or implemented by a combination of hardware and software modules in the encoding processor. Alternatively, the software modules may be located in a well-established storage medium in the art such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, and the like. The storage medium is located in a memory, and the processor reads information in the memory, and in combination with hardware, performs the steps in the above method embodiments.

The embodiment of the application also provides a computer program product, which comprises a computer program, wherein the computer program comprises instructions of the heating method in any one of the above embodiments, and the details are not repeated herein for the sake of brevity.

Referring to fig. 12, an embodiment of the present application further provides a computer readable storage medium 600, on which a computer program 610 is stored, where the computer program 610, when executed by the processor 620, implements the steps of the heating method according to any of the foregoing embodiments, which is not described herein for brevity.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims

1. An energy storage power supply, comprising:

A battery module, the battery module comprising a plurality of battery cells, the battery cells comprising a conductive housing;

an inverter, the inverter being electrically connected to the battery module to convert the direct current of the battery module into alternating current;

a coil electrically connected to the inverter and capable of flowing alternating current to generate an alternating magnetic field, wherein the conductive housing is at least partially located within the alternating magnetic field;

an output port, the output port being electrically connected to the inverter and outputting AC power to the outside;

A switch selectively electrically connects the inverter to the coil or the output port.

2. The energy storage power supply according to claim 1, characterized in that the coil comprises a wire, and the wire is wound into at least one of a ring shape, a spiral shape, and a U-shaped shape.

3. The energy storage power supply according to claim 1 or 2, characterized in that the energy storage power supply further includes a heating battery, the power supply input end of the inverter is connected to the heating battery, and the two ends of the coil are connected to the power supply output end of the inverter.

4. The energy storage power supply according to any one of claims 1 to 3, characterized in that the routing direction of the coil is perpendicular to the height direction of the battery cell.

5. The energy storage power supply according to any one of claims 1 to 3, characterized in that the energy storage power supply further comprises a mounting plate, and the coil is arranged on the mounting plate.

6. The energy storage power supply according to claim 1 or 5, characterized in that the battery modules include a plurality of battery modules, the plurality of battery modules are stacked, and the coil is provided between any two adjacent and stacked battery modules.

7. A heating method, characterized in that it is used for an energy storage power supply, the energy storage power supply comprising a battery module, an inverter, a coil, an output port, and a switch, the battery module comprising a plurality of battery cells, the battery cells comprising a conductive housing, the inverter being electrically connected to the battery module to convert direct current from the battery module into alternating current, the coil being electrically connected to the inverter and capable of circulating alternating current to generate an alternating magnetic field, the conductive housing being at least partially located within the alternating magnetic field, the output port being electrically connected to the inverter and outputting alternating current, the switch being selectively operable to electrically connect the inverter to the coil or the output port, the method comprising:

8. The heating method according to claim 7, wherein controlling the power on or off of the coil based on the temperature of the conductive shell comprises:

When the temperature of the conductive shell is lower than a first preset temperature, controlling the coil to be turned on;

When the temperature of the conductive housing is greater than a first preset temperature and less than a second preset temperature, controlling the coil to conduct at a preset frequency, or reducing at least one of the current, power, and AC frequency when the coil is conducting, wherein the first preset temperature and the second preset temperature are determined based on the operating temperature of the battery cell, and the second preset temperature is greater than the first preset temperature;

When the temperature of the conductive housing is greater than the second preset temperature threshold, the coil is controlled to be disconnected.

9. The heating method according to claim 8, wherein when the temperature of the conductive housing is greater than the second preset temperature threshold, controlling the coil to be disconnected comprises:

When the duration of the coil disconnection reaches a preset duration and the temperature of the conductive housing matches the second preset temperature threshold, it is determined that the heating is completed.

10. A non-volatile computer-readable storage medium containing a computer program, wherein when the computer program is executed by a processor, the processor is caused to perform the heating method according to any one of claims 7 to 9.