Battery monomer, battery pack and power utilization device

Abstract

The utility model discloses a single battery, a battery pack and a power utilization device, and relates to the technical field of batteries, and the single battery comprises a shell, an electrode assembly, a temperature monitoring assembly and a control assembly. The electrode assembly is arranged in the shell; the temperature monitoring assembly is arranged in the shell and comprises a temperature difference power generation chip and a temperature sensor, the temperature sensor is used for monitoring the temperature of the electrode assembly, the temperature difference power generation chip is provided with a first face and a second face, the first face is attached to the electrode assembly, and the second face and the electrode assembly are arranged in a spaced mode; the control assembly is arranged in the shell and electrically connected with the thermoelectric power generation chip, the control assembly comprises a Bluetooth module and an acquisition module, and the acquisition module is electrically connected with the temperature sensor and the Bluetooth module. According to the battery monomer, the temperature detection mode in the battery monomer can be optimized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery monomer, a battery pack and a power consumption device. BACKGROUND

[0002] Temperature monitoring of the battery can accurately grasp the health status of the battery, and prevent the battery from thermal runaway, so as to improve the battery life and ensure the safety of the battery. The traditional battery temperature monitoring method includes external detection method and internal detection method. The external detection method cannot directly collect the temperature inside the battery, resulting in a lag in temperature perception. The internal detection method often consumes the energy of the battery itself, resulting in inconsistent pressure difference between different batteries, which is not conducive to battery grouping. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the purpose of the present application is to overcome the shortcomings of the prior art and provide a battery monomer that can optimize the temperature detection method inside the battery monomer.

[0004] The present application also provides a battery pack.

[0005] The present application also provides a power consumption device.

[0006] To achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0007] In a first aspect, the present application provides a battery monomer, comprising: a shell; an electrode assembly arranged in the shell; a temperature monitoring assembly arranged in the shell, the temperature monitoring assembly comprising a thermoelectric power chip and a temperature sensor, the temperature sensor being used to monitor the temperature of the electrode assembly, the thermoelectric power chip having a first surface and a second surface, the first surface being attached to the electrode assembly, and the second surface being arranged apart from the electrode assembly; a control assembly arranged in the shell and electrically connected to the thermoelectric power chip, the control assembly comprising a Bluetooth module and an acquisition module, the acquisition module being electrically connected to the temperature sensor and the Bluetooth module respectively.

[0008] The battery monomer of the present application has the following advantages:

[0009] In the battery cell of the present application, the electrode assembly and the temperature monitoring assembly are both arranged in the shell, so that the temperature of the electrode assembly can be directly monitored by the temperature sensor of the temperature monitoring assembly, the data of the temperature sensor can be collected by the collection module, and the data collected by the collection module can be transmitted to the communication device outside the battery cell through the Bluetooth module, so that the internal temperature of the battery cell can be accurately monitored. In this process, the data is transmitted to the outside of the battery cell through Bluetooth, without the need for external leads, without affecting the airtightness of the battery cell, and with the advantages of strong anti-interference ability and long transmission distance. Further, since the control assembly is electrically connected with the thermoelectric chip, the control assembly can be powered by the thermoelectric chip. The thermoelectric chip powers the control assembly by the temperature difference between the first surface and the second surface. In this way, the energy of the electrode assembly is not consumed, and the influence on the voltage of the battery cell itself is avoided. In summary, the battery cell of the present application can not only accurately monitor the temperature inside the battery cell, but also reduce the influence on its own performance. Therefore, the battery cell of the present application can optimize the temperature detection method inside the battery cell.

[0010] In an optional embodiment, the control assembly further comprises a boost module and a voltage stabilizing module, the boost module is electrically connected with the thermoelectric chip and the voltage stabilizing module respectively, and the collection module, the temperature sensor and the Bluetooth module are all electrically connected with the voltage stabilizing module.

[0011] In an optional embodiment, the boost module comprises a boost piece and a voltage converter, the boost piece is electrically connected with the voltage converter and the thermoelectric chip respectively, and the voltage converter is electrically connected with the voltage stabilizing module.

[0012] In an optional embodiment, the input working voltage of the Bluetooth module is U1, the output voltage of the voltage converter is U2, and 1.8V≤U1≤3.3V and 2.6≤U2≤5.5V are satisfied.

[0013] In an optional embodiment, the input working voltage of the voltage converter is U3, the output voltage of the boost piece is U4, and 0.3V≤U3≤5.5V and 1V≤U4≤2V are satisfied.

[0014] In an optional embodiment, the temperature monitoring assembly further comprises a first electrical connection piece and a second electrical connection piece, the first surface is electrically connected with the control assembly through the first electrical connection piece, and the second surface is electrically connected with the control assembly through the second electrical connection piece.

[0015] The surface of the control assembly, the first electrical connection piece and the second electrical connection piece is coated with a corrosion-resistant layer.

[0016] In an optional embodiment, the electrode assembly comprises an insulating film and an electrode body, the first surface is attached to a surface of the electrode body, the insulating film is wrapped outside the electrode body and the thermoelectric chip, and the first electrical connector, the second electrical connector and the temperature sensor are arranged between the insulating film and the electrode body.

[0017] Or the electrode assembly comprises an insulating film and a plurality of electrode bodies, the thermoelectric chip and a plurality of the electrode bodies are arranged in the insulating film, and a plurality of the electrode bodies are arranged side by side, the first surface is attached to a surface of at least part of the electrode bodies, and the first electrical connector, the second electrical connector and the temperature sensor are arranged between two adjacent electrode bodies.

[0018] In an optional embodiment, the temperature difference between the first surface and the second surface is T, and the voltage generated by the thermoelectric chip is U5, which satisfies: 0.5V≤U5≤5V, and T≥15℃.

[0019] In a second aspect, the application provides a battery pack, comprising: the battery cell according to any one of the preceding embodiments; and a refrigeration member, which is attached to at least part of a surface of the battery cell, and the second surface of the thermoelectric chip of the battery cell faces the refrigeration member.

[0020] The battery pack of the application has the following advantages:

[0021] In the battery pack of the application, since the battery cell of the application can optimize the temperature detection mode inside the battery cell, the operating temperature of the battery pack of the application can be monitored in real time, thereby improving the use safety of the battery pack. In addition, since the refrigeration member is attached to at least part of a surface of the battery cell, and the second surface of the thermoelectric chip of the battery cell faces the refrigeration member, the battery cell can be cooled by the refrigeration member to avoid thermal runaway of the battery cell. In addition, the second surface of the thermoelectric chip can be cooled by the refrigeration member to increase the temperature difference between the first surface and the second surface of the thermoelectric chip, thereby improving the power supply stability and output power of the thermoelectric chip.

[0022] In a third aspect, the application provides a power consumption device, comprising: the battery pack according to the preceding embodiments.

[0023] The power consumption device of the application has the following advantages:

[0024] In the power consumption device of the application, since the above-mentioned battery pack has high use safety, the power consumption device of the application can have high use safety. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the exploded structure of a single battery cell in this application is shown. Figure 1 ;

[0027] Figure 2 A schematic diagram of the exploded structure of a single battery cell in this application is shown. Figure 2 ;

[0028] Figure 3 This diagram illustrates the unfolded structure of the electrode body, temperature monitoring component, and control component in this application. Figure 1 ;

[0029] Figure 4 This diagram illustrates the unfolded structure of the electrode body, temperature monitoring component, and control component in this application. Figure 2 ;

[0030] Figure 5 An exploded structural diagram of the battery pack in this application is shown.

[0031] Explanation of key component symbols:

[0032] 10-cell battery;

[0033] 100 - Housing;

[0034] 200 - Electrode assembly; 210 - Insulating film; 220 - Electrode body; 230 - Positive electrode tab; 240 - Negative electrode tab;

[0035] 300 - Temperature monitoring component; 310 - Thermoelectric chip; 311 - First side; 312 - Second side; 320 - Temperature sensor; 330 - First electrical connector; 340 - Second electrical connector;

[0036] 400 - Control Components;

[0037] 500 - Top cover assembly; 510 - Top cover; 520 - Positive electrode post; 530 - Negative electrode post; 540 - Positive electrode connector; 550 - Negative electrode connector;

[0038] 20 - Refrigeration components;

[0039] 30 - Integrated busbar. DETAILED DESCRIPTION

[0040] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar components are denoted by the same or similar reference numerals throughout the drawings. The embodiments described below are exemplary only, and are merely intended to explain the present application, and are not to be understood as limiting the present application.

[0041] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like are based on the orientations or positional relationships shown in the drawings, and are merely intended to facilitate the description of the present application and simplify the description, and are not intended to indicate or imply that the devices or elements indicated thereby must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0042] In addition, the terms "first", "second", etc. are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated thereby. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0043] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing", and the like should be understood broadly, for example, can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be 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, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0045] Referring to Figure 1 , Figure 3 and Figure 4 , the battery monomer 10 related to the embodiments of the present application comprises a shell 100, an electrode assembly 200, a temperature monitoring assembly 300 and a control assembly 400.

[0046] Specifically, the electrode assembly 200 is arranged in the shell 100; the temperature monitoring assembly 300 is arranged in the shell 100, the temperature monitoring assembly 300 comprises a temperature sensor 320 for monitoring the temperature of the electrode assembly 200 and a thermoelectric power generation chip 310, the thermoelectric power generation chip 310 has a first surface 311 and a second surface 312, the first surface 311 is attached to the electrode assembly 200, and the second surface 312 is arranged in a spaced manner with the electrode assembly 200; the control assembly 400 is arranged in the shell 100 and is electrically connected with the thermoelectric power generation chip 310, the control assembly 400 comprises a Bluetooth module and an acquisition module, the acquisition module is electrically connected with the temperature sensor 320 and the Bluetooth module respectively.

[0047] In the battery monomer 10 of the present application, the electrode assembly 200 and the temperature monitoring assembly 300 are both arranged in the shell 100, therefore, the temperature of the electrode assembly 200 can be directly monitored by the temperature sensor 320 of the temperature monitoring assembly 300, the data of the temperature sensor 320 is collected by the acquisition module, and the data collected by the acquisition module is transmitted to the communication device outside the battery monomer 10 through the Bluetooth module, so as to realize the accurate monitoring of the temperature inside the battery monomer 10. In this process, the data is transmitted to the outside of the battery monomer 10 through Bluetooth without external lead, which does not affect the air tightness of the battery monomer 10, and has the advantages of strong anti-interference ability and long transmission distance. Further, since the control assembly 400 is electrically connected with the thermoelectric power generation chip 310, the control assembly 400 can be powered by the thermoelectric power generation chip 310, the thermoelectric power generation chip 310 powers the control assembly 400 through the temperature difference between the first surface 311 and the second surface 312, so that the energy of the electrode assembly 200 is not consumed, and the influence on the voltage of the battery monomer 10 itself is avoided. In summary, the battery monomer 10 of the present application can not only realize the accurate monitoring of the temperature inside the battery monomer 10, but also reduce the influence on the performance of the battery monomer 10 itself, so that the battery monomer 10 of the present application can optimize the temperature detection method inside the battery monomer 10.

[0048] Specifically, in the embodiment, the acquisition module acquires the real-time resistance value of the temperature sensor 320 in the temperature change process, and transmits the real-time resistance value of the temperature sensor 320 to the external BMS (Battery Management System, battery management system) through the Bluetooth module. The BMS is an important component outside the battery monomer 10, which is used to monitor and manage the working state of the battery and / or battery pack to ensure the safety and performance of the battery and / or battery pack. After the Bluetooth module transmits the real-time resistance value of the temperature sensor 320 to the external BMS, the BMS converts the resistance value into a temperature value, thereby realizing real-time monitoring of the temperature inside the battery monomer 10.

[0049] More specifically, in the embodiment, the relationship between the resistance R of the temperature sensor 320 and the temperature T satisfies: R=0.06T+15.7; when T=20℃, R=16.9Ω; when T=25℃, R=17.2Ω; when T=30℃, R=17.5Ω; when T=35℃, R=17.8Ω; when T=40℃, R=18.1Ω; when T=45℃, R=18.4Ω; when T=50℃, R=18.7Ω. In this way, the sensing temperature of the temperature sensor 320 can be obtained according to the real-time resistance value of the temperature sensor 320, so as to realize real-time and accurate monitoring of the temperature inside the battery monomer 10.

[0050] Specifically, the control assembly 400 further includes a boost module and a voltage stabilizing module. The boost module is electrically connected with the thermoelectric generation chip 310 and the voltage stabilizing module respectively, and the acquisition module, the temperature sensor 320 and the Bluetooth module are all electrically connected with the voltage stabilizing module.

[0051] In the embodiment, since the boost module is electrically connected with the thermoelectric generation chip 310 and the voltage stabilizing module respectively, and the acquisition module, the temperature sensor 320 and the Bluetooth module are all electrically connected with the voltage stabilizing module, the voltage generated by the thermoelectric generation chip 310 can be boosted by the boost module and then stabilized by the voltage stabilizing module, so that the input voltage of the acquisition module, the temperature sensor 320 and the Bluetooth module can meet the working voltage requirements of the acquisition module, the temperature sensor 320 and the Bluetooth module.

[0052] Specifically, the boost module includes a boost piece and a voltage converter. The boost piece is electrically connected with the voltage converter and the thermoelectric generation chip 310 respectively, and the voltage converter is electrically connected with the voltage stabilizing module.

[0053] In the embodiment, the voltage generated by the thermoelectric chip 310 can be boosted by the voltage booster, and boosted or reduced by the voltage converter, so as to avoid the output voltage of the voltage booster being too high or too low, and then be stabilized by the voltage stabilizer, so that the voltage output by the voltage stabilizer meets the working voltage requirements of the collection module, the temperature sensor 320 and the Bluetooth module.

[0054] Specifically, in the embodiment, the voltage booster is a charge pump, which is mainly used to increase the voltage to the required level when the input voltage is low. In the embodiment, the main function of the charge pump is to increase the low voltage generated by the thermoelectric chip 310 to a higher voltage. The voltage converter is a DC / DC (Direct Current to Direct Current Converter) converter, which is used to convert one direct current voltage to another direct current voltage with different voltage. The DC / DC converter has the functions of voltage boosting and voltage reducing, so that the output voltage can meet the subsequent working voltage requirements. The DC / DC converter has the advantage of small static current, so that when the DC / DC converter is not running, it can have small energy consumption. At the same time, the input low voltage latch voltage of the DC / DC converter can be set, so that an opening voltage can be burned in the chip of the DC / DC converter, such as not opening the DC / DC converter when the voltage is lower than 0.5V, so as to prevent the power after voltage boosting from being insufficient due to low input voltage. Further, the DC / DC converter has the advantages of wide input voltage range and wide working temperature range, so as to cooperate with the thermoelectric chip 310 and meet the use environment requirements in the battery monomer 10.

[0055] Specifically, the input working voltage of the Bluetooth module is U1, and the output voltage of the voltage converter is U2, which satisfies: 1.8V≤U1≤3.3V, 2.6≤U2≤5.5V.

[0056] Specifically, in the embodiment, the input working voltage U1 of the Bluetooth module can be 1.8V, 2.0V, 2.2V, 2.4V, 2.6V, 2.8V, 3.0V, 3.3V, etc.; and the output voltage U2 of the voltage converter can be 2.6V, 3.0V, 3.4V, 3.8V, 4.2V, 4.6V, 5.0V, 5.5V, etc.

[0057] In the embodiment, if the input working voltage U1 of the Bluetooth module is less than 1.8V, the input working voltage of the Bluetooth module is too low, further leading to unstable Bluetooth signal output of the Bluetooth module, affecting the transmission of the monitoring data. If the input working voltage U1 of the Bluetooth module is greater than 3.3V, the input working voltage of the Bluetooth module is too high, thus leading to increased energy consumption of the Bluetooth module during operation. When the input working voltage of the Bluetooth module satisfies 1.8V≤U1≤3.3V, the stable output requirement of the Bluetooth module can be met, and the energy consumption of the Bluetooth module is reduced. Further, if the output voltage U2 of the voltage converter is less than 2.6V, the output voltage of the voltage converter cannot meet the voltage requirement for simultaneously supplying power to the Bluetooth module, the collection module and the temperature sensor 320. If the output voltage U2 of the voltage converter is greater than 5.5V, the output voltage of the voltage converter is too high, further making the output voltage of the voltage converter much higher than the sum of the working voltages required by the Bluetooth module, the collection module and the temperature sensor 320, thus increasing the energy consumption and causing energy waste. When the output voltage of the voltage converter satisfies 2.6≤U2≤5.5V, the output voltage of the voltage converter can meet the requirement for simultaneously supplying power to the Bluetooth module, the collection module and the temperature sensor 320, and the energy consumption of the output voltage of the voltage converter is reduced.

[0058] Specifically, the input working voltage of the voltage converter is U3, and the output voltage of the voltage booster is U4, satisfying 0.3V≤U3≤5.5V and 1V≤U4≤2V.

[0059] In the embodiment, if the input operating voltage U3 of the voltage converter is less than 0.3V, the output voltage of the voltage converter is reduced, and the output voltage of the voltage converter cannot meet the input operating voltage requirements of the collection module, the temperature sensor 320 and the Bluetooth module. If the input operating voltage U3 of the voltage converter is greater than 5.5V, the output voltage of the voltage converter is too high, resulting in energy waste. When the input operating voltage of the voltage converter satisfies 0.3V≤U3≤5.5V, the output voltage of the voltage converter can meet the input operating voltage requirements of the collection module, the temperature sensor 320 and the Bluetooth module, and the energy consumption of the output voltage of the voltage converter is reduced. Further, if the output voltage U4 of the voltage boosting component is less than 1V, the output voltage of the voltage boosting component cannot meet the input operating voltage requirements of the voltage converter. If the output voltage U4 of the voltage boosting component is greater than 2V, the input operating voltage of the voltage converter is too large, further causing the output voltage of the voltage converter to be too high, resulting in energy waste. When the output voltage of the voltage boosting component satisfies 1V≤U4≤2V, the output voltage of the voltage boosting component can meet the input operating voltage requirements of the voltage converter, and the output voltage of the voltage converter is prevented from being too high, reducing energy waste.

[0060] Referring to Figures 2 to 4 As shown in FIG. 4, the temperature monitoring assembly 300 further comprises a first electrical connecting component 330 and a second electrical connecting component 340. The first surface 311 is electrically connected to the control assembly 400 through the first electrical connecting component 330, and the second surface 312 is electrically connected to the control assembly 400 through the second electrical connecting component 340. The surfaces of the control assembly 400, the first electrical connecting component 330 and the second electrical connecting component 340 are all coated with a corrosion-resistant layer.

[0061] In the embodiment, the temperature difference power generation chip 310 and the control assembly 400 can be electrically connected through the first electrical connecting component 330 and the second electrical connecting component 340, and the temperature difference between the first surface 311 and the second surface 312 can be used to supply power to the control assembly 400 by the temperature difference power generation chip 310. Since the surfaces of the control assembly 400, the first electrical connecting component 330 and the second electrical connecting component 340 are all coated with a corrosion-resistant layer, the control assembly 400, the first electrical connecting component 330 and the second electrical connecting component 340 arranged inside the shell 100 can be prevented from being corroded by the electrolyte, thereby prolonging the service life of the control assembly 400, the first electrical connecting component 330 and the second electrical connecting component 340.

[0062] Specifically, in the embodiment, the first electrical connector 330 and the second electrical connector 340 are both polyimide wires, which have the advantages of heat resistance, chemical resistance, high insulation, lightweight, flexibility, and the like, and the main material of the anticorrosive layer on the surface of the polyimide wire is copper. The surface copper on the polyimide wire can not only significantly improve the electrical conductivity, mechanical strength, and heat dissipation capacity of the wire, but also enhance the corrosion resistance, oxidation resistance, and signal transmission quality of the wire.

[0063] Specifically, in the embodiment, the control assembly 400 is a PCB circuit board integrated with the acquisition module, the boost module, and the voltage stabilizing module. The main material of the anticorrosive layer coated on the surface of the PCB circuit board is 704 silicone rubber. The 704 silicone rubber encapsulates the PCB circuit board, completely covers the electronic components on the surface of the PCB circuit board, forms a protective film, and thus improves the reliability and service life of the PCB circuit board.

[0064] Continuing to refer to Figures 2 to 4 As shown in FIG. 2, in some embodiments, the electrode assembly 200 includes an insulating film 210 and a plurality of electrode bodies 220. The insulating film 210 covers the plurality of electrode bodies 220. The plurality of electrode bodies 220 are arranged side by side in the insulating film 210. The thermoelectric chip 310 is arranged in the insulating film 210, and the first surface 311 is attached to the surface of at least part of the electrode bodies 220. The first electrical connector 330, the second electrical connector 340, and the temperature sensor 320 are arranged between two adjacent electrode bodies 220 and are attached to the surfaces of the two electrode bodies 220.

[0065] In the embodiment, when the electrode assembly 200 includes a plurality of electrode bodies 220, the plurality of electrode bodies 220 are arranged side by side in the insulating film 210. The first electrical connector 330, the second electrical connector 340, and the temperature sensor 320 can be arranged between any two adjacent electrode bodies 220. Thus, the temperature sensor 320 can directly monitor the real-time temperature of the electrode assembly 200. In this process, the first electrical connector 330, the second electrical connector 340, and the temperature sensor 320 do not need to be provided with separate mounting grooves. Thus, the internal space of the battery monomer 10 occupied by the first electrical connector 330, the second electrical connector 340, and the temperature sensor 320 can be reduced, thereby improving the energy density of the battery monomer 10 and the assembly convenience of the battery monomer 10. Since the first electrical connector 330, the second electrical connector 340, and the temperature sensor 320 are attached to the surfaces of the two electrode bodies 220, the damage of the first electrical connector 330, the second electrical connector 340, and the temperature sensor 320 to the electrode bodies 220 can be reduced.

[0066] In some embodiments, the electrode assembly 200 comprises an insulating film 210 and an electrode body 220, the first surface 311 is attached to a surface of the electrode body 220, the insulating film 210 covers the electrode body 220 and the thermoelectric chip 310, and the first electrical connector 330, the second electrical connector 340 and the temperature sensor 320 are arranged between the insulating film 210 and the electrode body 220 and attached to an inner wall of the insulating film 210 and the surface of the electrode body 220.

[0067] In the present embodiment, when the electrode assembly 200 comprises an electrode body 220, the first electrical connector 330, the second electrical connector 340 and the temperature sensor 320 can be arranged between the insulating film 210 and the electrode body 220, so that the temperature sensor 320 can directly monitor the real-time temperature of the electrode assembly 200. In this process, the first electrical connector 330, the second electrical connector 340 and the temperature sensor 320 do not need to be provided with a separate mounting groove, so as to reduce the internal space of the battery monomer 10 occupied by the first electrical connector 330, the second electrical connector 340 and the temperature sensor 320, thereby improving the energy density of the battery monomer 10, improving the assembly convenience of the battery monomer 10, and reducing the damage of the first electrical connector 330, the second electrical connector 340 and the temperature sensor 320 to the electrode body 220 and the insulating film 210.

[0068] Specifically, referring to Figure 2As shown, the electrode assembly 200 further comprises a positive electrode tab 230 and a negative electrode tab 240, the positive electrode tab 230 and the negative electrode tab 240 are respectively connected at two ends of the electrode body 220, the battery monomer 10 further comprises a top cover assembly 500, the top cover assembly 500 is covered on the shell 100, the top cover assembly 500 comprises a top cover 510, a positive electrode post 520, a negative electrode post 530, a positive electrode connecting piece 540 and a negative electrode connecting piece 550, the control assembly 400, the positive electrode post 520 and the negative electrode post 530 are all connected on the top cover 510, and the control assembly 400 is arranged in a spaced manner with the positive electrode post 520 and the negative electrode post 530, the positive electrode tab 230 is connected with the positive electrode post 520 through the positive electrode connecting piece 540, and the negative electrode tab 240 is connected with the negative electrode post 530 through the negative electrode connecting piece 550, since the first electrical connection piece 330, the second electrical connection piece 340 and the temperature sensor 320 are arranged between the insulating film 210 and the electrode body 220 or between the electrode body 220 and the electrode body 220, the interference of the first electrical connection piece 330, the second electrical connection piece 340 and the temperature sensor 320 on the positive electrode connecting piece 540 and the negative electrode connecting piece 550 can be reduced, thereby reducing the possibility of the positive electrode connecting piece 540 and the negative electrode connecting piece 550 being crushed, and the stability of the battery monomer 10 is improved.

[0069] Specifically, in some embodiments, the temperature sensor 320 is a thin sensitive grid, compared with a thicker thermistor, the thin sensitive grid can be better placed between the insulating film 210 and the electrode body 220 or between the electrode body 220 and the electrode body 220, so as to further reduce the interference on the electrode assembly 200 and the top cover assembly 500.

[0070] Specifically, the temperature difference between the first face 311 and the second face 312 is T, and the voltage generated by the temperature difference power generation chip 310 is U5, which satisfies: 0.5V≤U5≤5V, and T≥15℃.

[0071] In the embodiment, if the voltage U5 generated by the thermoelectric chip 310 is less than 0.5 V, the voltage supplied by the thermoelectric chip 310 to the control assembly 400 can be too low, which can cause the working state of the control assembly 400 to be unstable. If the voltage U5 generated by the thermoelectric chip 310 is greater than 5 V, the voltage supplied by the thermoelectric chip 310 to the control assembly 400 can be too high, which can cause energy waste. When the voltage U5 generated by the thermoelectric chip 310 satisfies 0.5 V≤U5≤5 V, the working state stability of the control assembly 400 can be improved, and energy waste can be reduced. Further, when the temperature difference T between the first surface 311 and the second surface 312 is greater than or equal to 15 ℃, the power supply requirement of the thermoelectric chip 310 to the control assembly 400 can be met. In this way, the power supply requirement of the thermoelectric chip 310 to the control assembly 400 can be met under a relatively low temperature difference.

[0072] Referring to Figure 5 The battery pack provided in the embodiment includes the battery monomer 10 and the refrigeration member 20.

[0073] Specifically, the refrigeration member 20 is attached to at least part of the surface of the battery monomer 10, and the second surface 312 of the thermoelectric chip 310 of the battery monomer 10 faces the refrigeration member 20.

[0074] In the battery pack, the battery monomer 10 can optimize the temperature detection mode inside the battery monomer 10, so that the running temperature of the battery pack can be monitored in real time, and the use safety of the battery pack can be improved. In addition, the refrigeration member 20 is attached to at least part of the surface of the battery monomer 10, and the second surface 312 of the thermoelectric chip 310 of the battery monomer 10 faces the refrigeration member 20. In this way, the battery monomer 10 can be cooled by the refrigeration member 20 to avoid thermal runaway of the battery monomer 10. In addition, the second surface 312 of the thermoelectric chip 310 can be cooled by the refrigeration member 20 to increase the temperature difference between the first surface 311 and the second surface 312 of the thermoelectric chip 310, and to improve the power supply stability and output power of the thermoelectric chip 310.

[0075] Specifically, in the embodiment, the refrigeration member 20 is a semiconductor refrigeration sheet.

[0076] Specifically, in the embodiment, the battery pack includes a plurality of battery monomers 10 and a plurality of refrigeration members 20. At least part of the surface of each battery monomer 10 is attached to one refrigeration member 20, so that the refrigeration effect on the plurality of battery monomers 10 can be improved by the plurality of refrigeration members 20.

[0077] Specifically, referring to Figure 5As shown, in the embodiment, the battery pack further comprises an integrated busbar 30, the positive pole 520 and the negative pole 530 of each battery cell 10 are electrically connected with the integrated busbar 30, and the integrated busbar 30 is electrically connected with the BMS, so as to realize the electrical connection between the plurality of battery cells 10 and the BMS through the integrated busbar 30, thereby realizing the management of the plurality of battery cells 10 by the BMS.

[0078] The use electric device related to the embodiment of the application comprises the above battery pack.

[0079] In the use electric device of the application, since the above battery pack has high use safety, the use electric device of the application can have high use safety.

[0080] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0081] Although the embodiments of the application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the application, and the person skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the application.

Claims

1. A battery cell, characterized by, The application relates to a temperature monitoring device for an electrode assembly, which comprises the following components: a shell (100); an electrode assembly (200) arranged in the shell (100); a temperature monitoring assembly (300) arranged in the shell (100), wherein the temperature monitoring assembly (300) comprises a thermoelectric chip (310) and a temperature sensor (320), the temperature sensor (320) is used for monitoring the temperature of the electrode assembly (200), the thermoelectric chip (310) has a first surface (311) and a second surface (312), the first surface (311) is attached to the electrode assembly (200), and the second surface (312) is arranged in a spaced mode with the electrode assembly (200); and a control assembly (400) arranged in the shell (100) and electrically connected with the thermoelectric chip (310), wherein the control assembly (400) comprises a Bluetooth module and an acquisition module, and the acquisition module is electrically connected with the temperature sensor (320) and the Bluetooth module respectively. The control assembly (400) further comprises a voltage boosting module and a voltage stabilizing module, the voltage boosting module is electrically connected with the thermoelectric chip (310) and the voltage stabilizing module respectively, and the acquisition module, the temperature sensor (320) and the Bluetooth module are all electrically connected with the voltage stabilizing module. The voltage boosting module comprises a voltage boosting component and a voltage converter, the voltage boosting component is electrically connected with the voltage converter and the thermoelectric chip (310) respectively, and the voltage converter is electrically connected with the voltage stabilizing module. The input working voltage of the Bluetooth module is U1, the output voltage of the voltage converter is U2, and the following conditions are met: 1.8V <= U1 <= 3.3V and 2.6 <= U2 <= 5.5V. The input working voltage of the voltage converter is U3, the output voltage of the voltage boosting component is U4, and the following conditions are met: 0.3V <= U3 <= 5.5V and 1V <= U4 <= 2V.

2. The battery cell of claim 1, wherein, The temperature monitoring assembly (300) further comprises a first electrical connecting component (330) and a second electrical connecting component (340), the first surface (311) is electrically connected with the control assembly (400) through the first electrical connecting component (330), and the second surface (312) is electrically connected with the control assembly (400) through the second electrical connecting component (340).

3. The battery cell of claim 2, wherein, The surfaces of the control assembly (400), the first electrical connecting component (330) and the second electrical connecting component (340) are all coated with a corrosion-proof layer.

4. The battery cell of claim 3, wherein, The electrode assembly (200) comprises an insulating film (210) and an electrode body (220), the first surface (311) is attached to the surface of the electrode body (220), the insulating film (210) is coated on the electrode body (220) and the thermoelectric chip (310), and the first electrical connecting component (330), the second electrical connecting component (340) and the temperature sensor (320) are all arranged between the insulating film (210) and the electrode body (220).

5. The battery cell of claim 3, wherein, ​ 6. The battery cell of claim 1, wherein, ​ ​ 7. The battery cell of claim 6, wherein, ​ Or the electrode assembly (200) comprises an insulating film (210) and a plurality of electrode bodies (220), the thermoelectric power generation chip (310) and the plurality of electrode bodies (220) are arranged in the insulating film (210), and the plurality of electrode bodies (220) are arranged side by side, the first surface (311) is attached to the surface of at least part of the electrode bodies (220), and the first electrical connection (330), the second electrical connection (340) and the temperature sensor (320) are arranged between two adjacent electrode bodies (220).

8. The battery cell of claim 1, wherein, The temperature difference between the first surface (311) and the second surface (312) is T, and the voltage generated by the thermoelectric power generation chip (310) is U5, which satisfies: 0.5V≤U5≤5V, and T≥15℃.

9. A battery pack, characterized by, Comprising: The battery cell (10) according to any one of claims 1-8; A refrigeration member (20) is attached to at least part of the surface of the battery cell (10), and the second surface (312) of the thermoelectric power generation chip (310) of the battery cell (10) is arranged towards the refrigeration member (20).

10. An electrical device, characterized by Comprising: The battery pack according to claim 9.

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