Battery and thermal management method

Abstract

The invention discloses a battery and a thermal management method, the battery comprises a plurality of battery cells, a nanometer member, a first sensor and a waveform generation module, the nanometer member is arranged between two adjacent battery cells, the first sensor is arranged on the nanometer member and is used for monitoring expansion parameters of the battery cells at two sides of the nanometer member, and the waveform generation module is used for generating a waveform. The waveform generation module is used for generating electromagnetic waves when the expansion parameter monitored by the first sensor is higher than a first threshold value, and the electromagnetic waves are used for being absorbed by the nanometer component so as to enhance the structural strength of the nanometer component. According to the battery disclosed by the invention, relatively high risks of thermal runaway and thermal diffusion of the battery are improved, and the use safety of the battery is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery capable of avoiding thermal runaway and thermal diffusion. Background Art

[0002] In recent years, with the rise of new energy vehicles, the power battery industry has also developed rapidly. However, the power batteries in the existing technology still have a high risk of thermal runaway and thermal diffusion, which reduces the safety of battery use. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides a battery, which improves the high risk of thermal runaway and thermal diffusion of the battery and improves the safety of battery use.

[0005] The embodiment of the present invention further provides a thermal management method based on the above battery.

[0006] The battery of the embodiment of the present invention comprises:

[0007] Multiple cells;

[0008] A nano-component and a first sensor, wherein the nano-component is disposed between two adjacent battery cells, and the first sensor is disposed on the nano-component and is used to monitor expansion parameters of the battery cells on both sides of the nano-component;

[0009] A waveform generating module, wherein the waveform generating module is used to generate electromagnetic waves when the expansion parameter monitored by the first sensor is higher than a first threshold value, wherein the electromagnetic waves are used to be absorbed by the nano-component to enhance the structural strength of the nano-component.

[0010] In some embodiments, the expansion parameter includes at least one of the following: a rate of change of the expansion force, and a rate of expansion deformation.

[0011] In some embodiments, it also includes:

[0012] A second sensor, the second sensor is disposed on the nanostructured component and is used to monitor a temperature parameter of the battery cell;

[0013] An energy conversion module is disposed on the nanostructured component and is used for converting the heat generated by the battery cell into electrical energy for use by the battery when the temperature parameter monitored by the second sensor is higher than a second threshold.

[0014] In some embodiments, a circuit module is disposed in the nanostructure, and the electrical energy converted by the energy conversion module is used by the circuit module.

[0015] In some embodiments, the first sensor is a pressure sensor and the second sensor is a temperature sensor.

[0016] In some embodiments, the temperature parameter includes at least one of the following: temperature change rate, temperature peak value.

[0017] In some embodiments, a control module is included, and the control module is disposed in the nanostructured component or in a battery management system of the battery, and the first sensor, the waveform generating module, the second sensor, and the energy conversion module are all electrically connected to the control module.

[0018] In some embodiments, a monitoring module is included, the monitoring module is electrically connected to the control module, the monitoring module is disposed in the nanostructured component, and the monitoring module is used to monitor voltage and current.

[0019] The thermal management method of a battery according to an embodiment of the present invention comprises the following steps:

[0020] Monitoring expansion parameters and temperature parameters of the battery cell;

[0021] comparing the expansion parameter with the first threshold;

[0022] If the expansion parameter is higher than the first threshold, the temperature parameter is compared with the second threshold, otherwise, no comparison is made and the expansion parameter continues to be monitored;

[0023] If the temperature parameter does not exceed the second threshold, the waveform generating module is used to generate electromagnetic waves to enhance the structural strength of the nano-component; if the temperature parameter is higher than the second threshold, the energy conversion module is used to convert heat into electrical energy.

[0024] The thermal management method of a battery according to an embodiment of the present invention comprises the following steps:

[0025] Monitoring the temperature parameters of the surface of the battery cell and drawing a curve based on the collected temperature parameters;

[0026] Obtaining comparison parameters based on the curve, and comparing the comparison parameters with preset thermal runaway conditions and thermal diffusion conditions of the battery to determine whether thermal runaway or thermal diffusion occurs;

[0027] If the thermal runaway occurs, the thermal runaway strategy of the battery management system of the battery is executed, and the energy conversion module is used to convert the generated heat into electrical energy;

[0028] If the thermal runaway or the thermal diffusion does not occur, and the temperature in the comparison parameter is higher than a preset temperature peak, the energy conversion module is used to convert the generated heat into electrical energy;

[0029] If the thermal runaway or the thermal diffusion does not occur, and the temperature in the comparison parameter does not exceed the preset temperature peak value, the temperature parameters of the surface of the battery cell are continuously monitored.

[0030] Beneficial effects: The battery and thermal management method of the embodiments of the present invention improve the high risk of thermal runaway and thermal diffusion of the battery and improve the safety of battery use. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the arrangement of the battery cells and nano-components of the battery according to the embodiment of the present invention.

[0032] Figure 2 Schematic diagram of a nanostructure and its internal components according to an embodiment of the present invention.

[0033] Figure 3 4 is a logic block diagram of a thermal management method for a battery according to an embodiment of the present invention.

[0034] Reference numerals:

[0035] 1-battery cell; 2-nano component; 3-first sensor; 4-waveform generating module; 5-second sensor; 6-energy conversion module; 7-control module; 8-monitoring module. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0037] The present invention is based on the inventor's discovery and understanding of the following facts and problems:

[0038] Current battery products usually contain multiple cells that form the smallest unit (module or CTP Block) in the battery. In order to avoid heat diffusion between cells, foam or aerogel is placed between every two cells in this smallest unit, and NTC temperature sensors are also arranged on the smallest unit to monitor the temperature of the cells. However, batteries designed in the above way still have the following three problems in use:

[0039] 1) Although the NTC temperature sensor was designed through testing and simulation, and the measurement points that can theoretically cover the highest and lowest temperatures of the battery cells in the smallest unit were selected, in reality, when any battery cell has thermal runaway, there is a risk that the NTC temperature sensor cannot monitor the surface temperature of the thermal runaway battery cell. Therefore, it is impossible to accurately predict, alarm, and take corresponding measures to avoid thermal runaway before the battery pack occurs;

[0040] 2) When the temperature of any battery cell in the smallest unit continues to rise, thermal runaway is very likely to occur, and the high temperature is transferred to the adjacent battery cells through thermal radiation, resulting in thermal expansion of the battery cells. Although some battery companies or research institutions have proposed adding fire extinguishing devices to the battery pack, and some products have been put on the market, this method will occupy the battery pack space, reduce the number of battery cells, and reduce the battery energy density.

[0041] 3) Although the expansion force of the battery cell has been taken into consideration when designing the battery pack, that is, a foam with a certain compression preload and compression amount that meets the requirements is arranged between the two battery cells, or an aerogel of equal thickness is used, when heat diffusion occurs between the battery cells, especially when the temperature of the battery cells rises to a certain level, the expansion force and expansion deformation will exceed the theoretical design, which is likely to have an adverse effect on the battery life and battery performance. In addition, the current battery pack products cannot be directly observed because the battery cells are placed inside the battery pack. At the same time, no effective measures have been taken to monitor the expansion force or expansion deformation of the battery cells, which poses certain risks to the performance and service life of the battery pack.

[0042] like Figure 1 and Figure 2 As shown, the battery according to the embodiment of the present invention includes a plurality of battery cells 1 , a nano-component 2 , a first sensor 3 and a waveform generating module 4 .

[0043] The battery cell 1 may be a single battery such as a lithium battery cell 1 , and a plurality of battery cells 1 may be arranged at intervals along the left-right direction. In some other embodiments, the battery cells 1 may also be arranged at intervals along the front-back direction or other directions.

[0044] The nano-component 2 is disposed between two adjacent battery cells 1, and the first sensor 3 is disposed on the nano-component 2 and is used to monitor the expansion parameters of the battery cells 1 on both sides of the nano-component 2. For example, the nano-component 2 is a structural member processed from nano-materials, which can be carbon-based nano-materials, metal nano-materials, etc. Figure 1 As shown, a nano-component 2 may be arranged between any two adjacent battery cells 1 .

[0045] like Figure 2As shown, the first sensor 3 may be a pressure sensor, and specifically a diaphragm pressure sensor, and the first sensor 3 may be fixed on the nanostructured component 2. When the battery cell 1 is deformed such as expansion, the first sensor 3 will be squeezed, so that the corresponding expansion parameters of the battery cell 1 can be monitored, wherein the expansion parameters may specifically be the rate of change of expansion force, expansion deformation rate, etc.

[0046] The waveform generating module 4 is used for generating electromagnetic waves when the expansion parameter monitored by the first sensor 3 is higher than a first threshold value, and the electromagnetic waves are used for being absorbed by the nano-component 2 to enhance the structural strength of the nano-component 2 .

[0047] For example, the waveform generating module 4 may specifically be a waveform signal generating circuit, such as Figure 2 As shown, the waveform generating module 4 can be directly fixed in the nano-component 2. In some other embodiments, the waveform generating module 4 can also be arranged at other positions such as the battery casing.

[0048] When the expansion parameter monitored by the first sensor 3 exceeds a first threshold value, where the first threshold value can be a certain value of the rate of change of the expansion force or a certain value of the expansion deformation rate, the controller can control the operation of the waveform generating module 4 to generate electromagnetic waves. The generated electromagnetic waves can be absorbed by the nano-component 2, and the structural strength of the nano-component 2 that absorbs the electromagnetic waves will change, thereby achieving the adjustment of the structural strength of the nano-component 2.

[0049] The battery of the embodiment of the present invention is provided with a nano-component 2, a first sensor 3 and a waveform generating module 4. The waveform generating module 4 generates electromagnetic waves to adjust the structural strength of the nano-component 2, thereby enhancing the nano-component 2 to resist the deformation of the two battery cells 1 being squeezed inward, so that the nano-component 2 can exert a reverse force on the surface of the battery cell 1, thereby playing the effect of suppressing the expansion and deformation of the battery cell 1.

[0050] In some embodiments, Figure 2 As shown, the battery further includes a second sensor 5 and an energy conversion module 6, and the second sensor 5 is disposed in the nano-component 2 and is used to monitor the temperature parameters of the battery cell 1. For example, the second sensor 5 can be a temperature sensor, etc., and the second sensor 5 can be disposed in the nano-component 2. When in use, the second sensor 5 can monitor the surface temperature parameters of the battery cell 1, wherein the temperature parameters can specifically be the temperature change rate, the temperature peak value, etc.

[0051] The energy conversion module 6 is disposed on the nanostructured component 2 , and is used for converting the heat generated by the battery cell 1 into electrical energy for use by the battery when the temperature parameter monitored by the second sensor 5 is higher than a second threshold value.

[0052] For example, the energy conversion module 6 may specifically be a heat-electric energy conversion module, such as Figure 2 As shown, the energy conversion module 6 can also be arranged in the nano-component 2. When the temperature parameter monitored by the second sensor 5 is higher than the second threshold value, where the second threshold value can specifically be a certain value of the temperature change rate or a certain temperature peak value, the controller can start the energy conversion module 6. The energy conversion module 6 can absorb the heat generated by the battery cell 1 and convert the heat into electrical energy. The generated electrical energy can be directly used for the operation of the battery or part of the electrical components of the battery.

[0053] Therefore, on the one hand, heat absorption is achieved, thereby avoiding the situation where the temperature of the battery cell 1 is too high, thereby playing a role in suppressing thermal runaway and heat diffusion. On the other hand, the absorbed heat can be converted into electrical energy, thereby realizing the recovery and reuse of electrical energy, reducing overall energy consumption and improving energy utilization.

[0054] In some embodiments, a circuit module is provided in the nano-component 2, and the electric energy converted by the energy conversion module 6 is used by the circuit module. For example, the circuit module can be a circuit for powering the first sensor 3, the second sensor 5, the waveform generating module 4, etc., and the electric energy converted by the energy conversion module 6 can be delivered to the circuit module, thereby meeting the need for consumption in the nano-component 2.

[0055] In some embodiments, the battery includes a control module 7, which is disposed in the nanostructured component 2 or in a battery management system of the battery. The first sensor 3, the waveform generating module 4, the second sensor 5, and the energy conversion module 6 are all electrically connected to the control module 7.

[0056] For example, the control module 7 may specifically be a single chip microcomputer, such as Figure 2 As shown, the control module 7 can be arranged in the nanostructured component 2. When in use, the information monitored by the first sensor 3 and the second sensor 5 can be transmitted to the control module 7. The control module 7 can compare and analyze the monitored information, and then control the operation of the waveform generating module 4 and the energy conversion module 6, so as to meet the needs of emitting electromagnetic waves and converting energy.

[0057] In other embodiments, the control module 7 may also be integrated into a battery management system (BMS). In this case, the control module 7 may be regarded as a part of the battery management system, and the control module 7 may be communicatively connected to the battery management system, so that the signals monitored by the first sensor 3 and the second sensor 5 may be transmitted to the battery management system, thereby enhancing the effective monitoring and management of the battery's operating status.

[0058] In some embodiments, the battery includes a monitoring module 8 , which is electrically connected to the control module 7 , and is disposed on the nanostructured component 2 , and is used to monitor voltage and current.

[0059] For example, the monitoring module 8 may be a voltage and current signal monitoring module, which may be used to monitor the corresponding voltage and current in the battery. The monitored voltage and current may also assist in monitoring the operating status of the battery, thereby improving the accuracy of thermal runaway and thermal diffusion monitoring.

[0060] In some embodiments, the nano-component 2 has a certain adsorption capacity, so that the nano-component 2 can be perfectly attached to the side of the battery cell 1, thereby facilitating the assembly of the nano-component 2 and the battery cell 1.

[0061] In some embodiments, Figure 2 As shown, two first sensors 3 and two second sensors 5 can be provided, wherein the two first sensors 3 can be respectively fitted and fixed on the left and right sides of the nano-component 2, and the two second sensors 5 can be respectively provided in the middle of the nano-component 2.

[0062] Therefore, on the one hand, the monitoring accuracy can be enhanced to avoid the situation where setting a single sensor easily causes monitoring errors. On the other hand, the two second sensors 5 can separately monitor the temperature parameters of the battery cells 1 on the left and right sides. If only one of the temperature parameters monitored by the second sensor 5 is abnormal, it can be determined that the single battery cell 1 has thermal runaway. If the temperature parameters monitored by the two second sensors 5 are abnormal, it can be determined that the battery has thermal diffusion, which facilitates the monitoring and distinction between thermal runaway and thermal diffusion, and further facilitates the battery to adopt different strategies to deal with them.

[0063] The thermal management method according to an embodiment of the present invention is described below.

[0064] like Figure 3 As shown, the thermal management method of a battery according to an embodiment of the present invention comprises the following steps:

[0065] A1: Monitor the expansion parameters and temperature parameters of the battery cell 1. Specifically, when the battery is powered on, the expansion parameters and temperature parameters can be monitored by the first sensor 3 and the second sensor 5.

[0066] A2: Compare the expansion parameter with the first threshold value. For example, the first threshold value may be the initial expansion force value, the expansion deformation, etc. The expansion parameter monitored by the first sensor 3 may be directly transmitted to the control module 7, and the first threshold value may be pre-programmed into the control module 7, so that the comparison between the expansion parameter and the first threshold value can be realized through the control module 7.

[0067] A3: If the expansion parameter is higher than the first threshold, the temperature parameter is compared with the second threshold. Figure 3As shown, the first threshold value may also be a safety value for allowed expansion. When the monitored expansion parameter exceeds the safety value, the temperature parameter monitored by the second sensor 5 and the safety value for allowed temperature (which may be regarded as the second threshold value) may be further compared and analyzed.

[0068] It should be noted that, after comparison, if the expansion parameter does not exceed the first threshold, the temperature parameter and the second threshold are not compared, and the first sensor 3 can continue to monitor the expansion parameter.

[0069] A4: Figure 3 As shown, if the temperature parameter does not exceed the second threshold, the waveform generating module 4 is used to generate electromagnetic waves to enhance the structural strength of the nano-component 2. Thus, by adjusting the structural strength of the nano-component 2, the expansion and deformation of the battery cell 1 can be suppressed.

[0070] If the temperature parameter is higher than the second threshold, the energy conversion module 6 is used to convert the heat into electrical energy, thereby absorbing energy and preventing the battery cell 1 from being overheated, thereby avoiding thermal runaway and heat diffusion.

[0071] A thermal management method according to another embodiment of the present invention is described below.

[0072] The thermal management method of a battery according to an embodiment of the present invention comprises the following steps:

[0073] B1: Monitor the temperature parameters of the surface of the battery cell 1 and draw a curve of the collected temperature parameters. Specifically, Figure 3 As shown, the temperature parameters of the surface of the battery cell 1 can be monitored by the second sensor 5 , and the monitored temperature parameters can be transmitted to the control module 7 . The control module 7 can be used to fit the temperature rise curve of the battery cell 1 .

[0074] B2: Obtain comparison parameters based on the curve, and compare the comparison parameters with the preset thermal runaway conditions and thermal diffusion conditions of the battery to determine whether thermal runaway or thermal diffusion occurs.

[0075] Specifically, the corresponding comparison parameters can be obtained through the above fitting curve, and the comparison parameters can specifically be the above temperature change rate, temperature peak value, etc. Then, the comparison parameters can be compared and analyzed with the thermal runaway condition and the thermal diffusion condition respectively.

[0076] B3: If Figure 3 As shown, if thermal runaway occurs, the thermal runaway strategy of the battery management system of the battery is executed, and the energy conversion module 6 is used to convert the generated heat into electrical energy, thereby achieving the effect of suppressing thermal runaway.

[0077] B4: If Figure 3As shown, if thermal runaway or thermal diffusion does not occur, and the temperature in the comparison parameter is higher than the preset temperature peak, the generated heat is converted into electrical energy by the energy conversion module 6. This can absorb the generated heat in time and avoid heat accumulation.

[0078] B5: Figure 3 As shown, if thermal runaway or thermal diffusion does not occur and the temperature in the comparison parameter does not exceed the preset temperature peak value, the temperature parameters of the surface of the battery cell 1 are continuously monitored.

[0079] A specific example of the thermal management method according to the embodiment of the present invention is described below.

[0080] The present invention provides a battery that can avoid thermal runaway and thermal diffusion, which mainly includes a monitoring part, a control part, and an execution part. The monitoring part includes a diaphragm pressure sensor (which can be regarded as a first sensor 3), a temperature sensor (which can be regarded as a second sensor 5), and a voltage and current signal monitoring unit (which can be regarded as a monitoring module 8), and the monitoring part is integrated on a nano material (which can be regarded as a nano component 2).

[0081] The control part is composed of a single-chip microcomputer with pressure signal processing capabilities, temperature signal processing capabilities, voltage and current signal processing capabilities, and the single-chip microcomputer can communicate with the battery management system (BMS), transmit the monitoring signal, synchronously realize the control of the execution part, and effectively monitor and manage the battery pack status.

[0082] The execution part may include a waveform signal generating circuit (which may be regarded as a waveform generating module 4 ), and an energy and electric quantity conversion module (which may be regarded as an energy conversion module 6 ).

[0083] When using the battery, the nanomaterials integrating the diaphragm pressure sensor, temperature sensor, voltage and current signal monitoring unit circuit can be arranged between two battery cells 1. At the same time, the nanomaterials have adsorption capacity and can fit perfectly between adjacent battery cells 1. Then, the interface extending from the circuit of the control part and the like is synchronously connected to the BMS through the wiring harness. The waveform signal generation circuit and the energy and power conversion module are arranged on the nanomaterial at the same time.

[0084] During the use of the battery, the monitoring part monitors the status of the battery cell 1 in real time. After the nanomaterial is installed between two adjacent battery cells 1 and the battery pack is assembled, the diaphragm is deformed, resulting in pressure changes. The monitoring part transmits the signal generated by the deformation to the control part, and the calculated deformation and pressure are used as the initial state and recorded synchronously in the BMS.

[0085] Usage scenario 1: Thermal runaway occurs or is about to occur.

[0086] When the monitoring part monitors the temperature of battery cell 1, the control part will draw the analyzed signal in real time as the temperature rise curve of battery cell 1. When the temperature rise rate changes significantly faster but does not trigger the thermal runaway alarm, the control part will send a signal to the BMS for early warning, and simultaneously determine whether the current temperature of battery cell 1 is too high and whether it needs to be cooled.

[0087] When the temperature rises too quickly and triggers the BMS thermal runaway signal, while the BMS adjusts the thermal runaway strategy, the control module 7 sends a signal to the execution module. Through the energy and power conversion module, the heat on the surface of the battery cell 1 is converted into power supply energy for all circuit modules on the nanomaterial, and part of the heat is taken away simultaneously, so that the surface temperature of the battery cell 1 is reduced, reducing the risk of fire or explosion of the battery cell 1.

[0088] Usage scenario 2: Heat diffusion is about to occur between battery cells 1.

[0089] When the monitoring part monitors the temperature of battery cell 1, the control part will draw the analyzed signal in real time as the temperature rise curve of battery cell 1. When the temperature rise rate changes significantly faster but no obvious heat diffusion occurs, the control part will send a signal to the BMS for early warning, and simultaneously determine whether the current temperature of battery cell 1 is too high and whether it needs to be cooled.

[0090] When the temperature rises too quickly and approaches the thermal diffusion condition, the control part sends a signal to the execution part, and through the energy and power conversion module, the heat on the surface of the battery cell 1 is converted into power supply energy for all circuit modules on the nanomaterial, and part of the heat is taken away simultaneously to reduce the surface temperature of the battery cell 1 and avoid heat diffusion between the battery cells 1.

[0091] Usage scenario three: The expansion force and expansion deformation of battery cell 1 increase due to the increase in temperature.

[0092] The monitoring part simultaneously monitors the state of the diaphragm pressure sensor in real time to reflect the changes in the expansion force and expansion deformation of the battery cell 1. When the expansion force and expansion deformation of the battery cell 1 change due to the increase in temperature, the control part will process the collected signal and compare it with the initial expansion force and expansion deformation. When the rate of change of the expansion force and the rate of expansion deformation are higher than the safety value, the control part will send a signal to the BMS, and the BMS will send the control signal to the energy and power conversion module and the waveform generating circuit. Through the energy and power conversion module, the heat on the surface of the battery cell 1 is converted into the power supply energy of all circuit modules on the nanomaterial, and part of the heat is taken away synchronously, so that the surface temperature of the battery cell 1 is reduced, and the rate of change of the expansion force and the rate of expansion deformation are reduced; the waveform generating circuit emits electromagnetic waves of a specific frequency. After being absorbed by the nanomaterial, the electromagnetic waves can strengthen the strength of the nanomaterial, exert a reverse force on the surface of the battery cell 1, and suppress the expansion of the battery cell 1.

[0093] The battery of the embodiment of the present invention has the following beneficial effects:

[0094] 1. Before thermal runaway occurs, the system can accurately predict, alarm and take corresponding measures to avoid it. Even if thermal runaway occurs, it can be linked with BMS and adopt dual inhibition mode to fully reduce the temperature of the battery cell and prevent the battery cell from catching fire or exploding.

[0095] 2. There is no need to add a large fire extinguishing device. It can prevent thermal runaway and heat diffusion of the battery cell without taking up too much battery pack space and maintaining the original battery energy density.

[0096] 3. Effective measures can be taken to monitor the expansion force or expansion deformation of the battery cell, and at the same time, it can be compared with the expansion force or expansion deformation in the initial state of the battery cell. When the rate of change of the expansion force and the expansion deformation rate are higher than the safety value, effective regulation can be carried out to ensure that the battery cell is in a good working condition and also ensure the performance and service life of the battery pack.

[0097] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0098] 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 at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0099] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0100] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0101] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0102] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A battery, characterized in that: include: Multiple cells; A nano-component and a first sensor, wherein the nano-component is disposed between two adjacent battery cells, and the first sensor is disposed on the nano-component and is used to monitor expansion parameters of the battery cells on both sides of the nano-component; A waveform generating module, wherein the waveform generating module is used to generate electromagnetic waves when the expansion parameter monitored by the first sensor is higher than a first threshold value, wherein the electromagnetic waves are used to be absorbed by the nano-component to enhance the structural strength of the nano-component.

2. The battery according to claim 1, characterized in that The expansion parameter includes at least one of the following: a rate of change of the expansion force, and a rate of expansion deformation.

3. The battery according to claim 1, characterized in that Also includes: A second sensor, the second sensor is disposed on the nanostructured component and is used to monitor a temperature parameter of the battery cell; An energy conversion module is disposed on the nanostructured component and is used for converting the heat generated by the battery cell into electrical energy for use by the battery when the temperature parameter monitored by the second sensor is higher than a second threshold.

4. The battery according to claim 3, characterized in that A circuit module is arranged inside the nanostructured component, and the electric energy converted by the energy conversion module is used by the circuit module.

5. The battery according to claim 3, characterized in that The first sensor is a pressure sensor, and the second sensor is a temperature sensor.

6. The battery according to claim 3, characterized in that The temperature parameter includes at least one of the following: temperature change rate and temperature peak value.

7. The battery according to any one of claims 3 to 6, characterized in that: It comprises a control module, which is arranged in the nanostructured component or in a battery management system of the battery; the first sensor, the waveform generating module, the second sensor and the energy conversion module are all electrically connected to the control module.

8. The battery according to claim 7, characterized in that It comprises a monitoring module, the monitoring module is electrically connected to the control module, the monitoring module is arranged on the nano-component, and the monitoring module is used to monitor voltage and current.

9. A thermal management method for a battery according to claim 7 or 8, characterized in that: The following steps are involved: Monitoring expansion parameters and temperature parameters of the battery cell; comparing the expansion parameter with the first threshold; If the expansion parameter is higher than the first threshold, the temperature parameter is compared with the second threshold, otherwise, no comparison is made and the expansion parameter continues to be monitored; If the temperature parameter does not exceed the second threshold, the waveform generating module is used to generate electromagnetic waves to enhance the structural strength of the nano-component; if the temperature parameter is higher than the second threshold, the energy conversion module is used to convert heat into electrical energy.

10. A thermal management method for a battery according to claim 7 or 8, characterized in that: The following steps are involved: Monitoring the temperature parameters of the surface of the battery cell and drawing a curve based on the collected temperature parameters; Obtaining comparison parameters based on the curve, and comparing the comparison parameters with preset thermal runaway conditions and thermal diffusion conditions of the battery to determine whether thermal runaway or thermal diffusion occurs; If the thermal runaway occurs, the thermal runaway strategy of the battery management system of the battery is executed, and the energy conversion module is used to convert the generated heat into electrical energy; If the thermal runaway or the thermal diffusion does not occur, and the temperature in the comparison parameter is higher than a preset temperature peak, the energy conversion module is used to convert the generated heat into electrical energy; If the thermal runaway or the thermal diffusion does not occur, and the temperature in the comparison parameter does not exceed the preset temperature peak value, the temperature parameters of the surface of the battery cell are continuously monitored.

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