Sensor assembly, battery, battery pack and electric equipment

Abstract

The invention relates to the technical field of batteries, and provides a sensor assembly, a battery, a battery pack and electric equipment, the sensor assembly comprises a sensor, an outgoing line and a signal analysis transmission board; the sensor comprises a sensor body and at least one detection point arranged on the sensor body; the detection point is electrically connected with the first end of the outgoing line, and the second end of the outgoing line is electrically connected with the signal analysis transmission board; the detection point is a temperature detection point or a stress detection point. According to the sensor assembly provided by the embodiment of the invention, the temperature or pressure in the battery can be monitored in real time, so that the safe use performance of the battery can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery detection technology, and in particular to a sensor assembly, a battery, a battery pack, and an electrical device. Background Art

[0002] Power batteries are core components of new energy vehicles, and their safety directly impacts the overall safety performance of the vehicle. During use, power batteries experience temperature fluctuations and the cell core expands in volume. Accurately monitoring the evolution of internal battery temperature and stress is crucial to better guide subsequent power battery product design.

[0003] Currently, when monitoring the internal temperature and stress of a battery, sensors are generally installed on the PCB board. In this case, what is actually monitored is the temperature and pressure at the bottom of the battery, and real-time monitoring of the temperature and pressure inside the battery cannot be achieved. Summary of the Invention

[0004] The present application provides a sensor assembly, a battery, a battery pack, and an electrical device that can monitor the temperature or pressure inside the battery in real time, thereby improving the safe use performance of the battery.

[0005] A first aspect of the present application provides a sensor assembly, comprising at least:

[0006] Sensors, lead wires, and signal analysis and transmission boards;

[0007] The sensor comprises: a sensor body and at least one detection point arranged on the sensor body;

[0008] The detection point is electrically connected to the first end of the lead wire, and the second end of the lead wire is electrically connected to the signal analysis and transmission board;

[0009] The detection point is a temperature detection point or a stress detection point.

[0010] The sensor of the present application embodiment is designed to include a sensor body and at least one detection point, which is located on the sensor body. After the detection point on the sensor body detects temperature or pressure, the signal is transmitted via a lead wire to a signal analysis and transmission board for processing the temperature or pressure detected by the detection point. Therefore, the sensor assembly provided by the embodiment of the present application can monitor the temperature or pressure inside the battery in real time, thereby improving the safe use performance of the battery.

[0011] In one possible implementation, the at least one detection point includes: at least one temperature detection point and / or at least one stress detection point.

[0012] In a possible implementation, there are multiple temperature detection points and multiple stress detection points; the multiple temperature detection points and the multiple stress detection points are distributed in an array.

[0013] In one possible implementation, the plurality of detection points form an array area, and the array area is divided into X regions along the length direction of the array area, and is divided into Y regions along the width direction of the array area, so that the array area is divided into X*Y sub-regions.

[0014] The temperature detection points or the stress detection points are set in at least some of the sub-areas among the X*Y sub-areas.

[0015] In a possible implementation, the temperature detection point or the stress detection point is provided in the middle of the array area; and / or the temperature detection point or the stress detection point is provided at an end of the array area.

[0016] In a possible implementation, the temperature detection point or the stress detection point is provided in each of the sub-areas.

[0017] In a possible implementation manner, the sensor body is in a thin sheet shape.

[0018] In a possible implementation, the lead line is a strip line; or, the lead line is a column line.

[0019] In one possible implementation, the sensor, the lead wires, and the signal analysis and transmission board are an integrated structure.

[0020] In one possible implementation, the sensor and the lead wire are an integrated structure;

[0021] The lead-out wire is plug-connected to the signal analysis and transmission board.

[0022] In one possible implementation, one of the lead-out line and the signal analysis and transmission board is provided with a pin, and the other of the lead-out line and the signal analysis and transmission board is provided with a jack; the pin is inserted into the jack.

[0023] In a possible implementation, it further includes: a first plug-in converter; one end of the first plug-in converter is electrically connected to the lead wire, and the other end of the first plug-in converter is electrically connected to the signal analysis and transmission board.

[0024] In one possible implementation, the lead wire and the signal analysis and transmission board are an integrated structure;

[0025] The lead wire is plug-connected to the sensor.

[0026] In one possible implementation, one of the lead wire and the sensor is provided with a pin, and the other of the lead wire and the sensor is provided with a jack; the pin is inserted into the jack.

[0027] In a possible implementation, the device further includes: a second plug-in converter; one end of the second plug-in converter is electrically connected to the lead wire, and the other end of the second plug-in converter is electrically connected to the sensor.

[0028] In a possible implementation, the lead wire is plug-connected to the signal analysis and transmission board, and the lead wire is plug-connected to the sensor.

[0029] In one possible implementation, one of the lead wire and the signal analysis and transmission board is provided with a pin, and the other of the lead wire and the signal analysis and transmission board is provided with a jack; the pin is inserted into the jack;

[0030] And / or, one of the lead wire and the sensor is provided with a pin, and the other of the lead wire and the sensor is provided with a jack; the pin is inserted into the jack;

[0031] And / or, further comprising: a first plug-in converter; one end of the first plug-in converter is electrically connected to the lead wire, and the other end of the first plug-in converter is electrically connected to the signal analysis and transmission board;

[0032] And / or, further comprising: a second plug-in converter; one end of the second plug-in converter is electrically connected to the lead wire, and the other end of the second plug-in converter is electrically connected to the sensor.

[0033] In a possible implementation, the lead wire includes a first part and a second part that are independent of each other;

[0034] The sensor and the first end of the first part are an integrated structure, and the first end of the second part and the signal analysis and transmission board are an integrated structure;

[0035] The second end of the first part is plug-connected with the second end of the second part.

[0036] In one possible implementation, a pin is provided on one of the second end of the first part and the second end of the second part, and a socket is provided on the other of the second end of the first part and the second end of the second part; the pin is inserted into the socket.

[0037] In one possible implementation, the device further includes: a third plug converter; one end of the third plug converter is electrically connected to the second end of the first part, and the other end of the third plug converter is electrically connected to the second end of the second part.

[0038] In one possible implementation, at least a portion of the outer surface of the sensor is provided with an anti-corrosion layer.

[0039] In a possible implementation, the anti-corrosion layer includes a first anti-corrosion layer; the first anti-corrosion layer is provided on the outer surface of the sensor;

[0040] The first anti-corrosion layer is made of a polymer film material.

[0041] In one possible implementation, the polymer film material is polyimide or polyethylene.

[0042] In a possible implementation, the anti-corrosion layer further includes a second anti-corrosion layer; the sensor body is coated in the second anti-corrosion layer;

[0043] The second anti-corrosion layer is a hydrophobic breathable membrane.

[0044] In one possible implementation, the hydrophobic breathable film is an aluminum-plastic film.

[0045] A second aspect of the present application provides a battery, comprising at least a battery body and any of the above-mentioned sensor assemblies;

[0046] The sensor of the sensor assembly is attached to at least a portion of the outer surface of the battery body.

[0047] In the embodiment of the present application, the above-mentioned sensor component is provided in the battery, so that the sensor component can monitor the temperature or pressure inside the battery in real time, thereby improving the safe use performance of the battery.

[0048] In a possible implementation, the device further includes: a positive electrode cover plate and a negative electrode cover plate; an opening for allowing a lead wire of the sensor assembly to pass through is provided on the positive electrode cover plate or the negative electrode cover plate.

[0049] In one possible implementation, the shape of the opening matches the cross-sectional shape of the lead wire; or, the shape of the opening matches the cross-sectional shape of the first plug-in converter in the sensor assembly; or, the shape of the opening matches the cross-sectional shape of the second plug-in converter in the sensor assembly; or, the shape of the opening matches the cross-sectional shape of the third plug-in converter in the sensor assembly.

[0050] In a possible implementation, a sealing ring is provided on the inner wall of the opening, and the sealing ring is located between the opening and the lead-out wire.

[0051] In a possible implementation, a sealing material is filled between the sealing ring and the lead wire.

[0052] A third aspect of the present application provides a battery pack comprising at least any of the batteries described above.

[0053] The embodiment of the present application can improve the performance of the battery pack by arranging the battery with the sensor assembly in the battery pack.

[0054] A fourth aspect of the present application provides an electrical device comprising at least any one of the above-mentioned batteries or the above-mentioned battery packs.

[0055] The embodiments of the present application can improve the performance of the electrical equipment by providing the battery or battery pack having the sensor assembly described above in the electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] To more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0057] Figure 1 A schematic cross-sectional view of a sensor assembly provided in an embodiment of the present application;

[0058] Figure 2 Another schematic cross-sectional view of a sensor assembly according to an embodiment of the present application;

[0059] Figure 3 A schematic diagram of another cross-sectional structure of a sensor assembly provided in an embodiment of the present application;

[0060] Figure 4 A schematic diagram of another cross-sectional structure of a sensor assembly provided in an embodiment of the present application;

[0061] Figure 5 A schematic diagram of another cross-sectional structure of a sensor assembly provided in an embodiment of the present application;

[0062] Figure 6 A schematic diagram of another cross-sectional structure of a sensor assembly provided in an embodiment of the present application;

[0063] Figure 7 A schematic diagram of another cross-sectional structure of a sensor assembly provided in an embodiment of the present application;

[0064] Figure 8 A schematic diagram of another cross-sectional structure of a sensor assembly provided in an embodiment of the present application;

[0065] Figure 9 A schematic diagram of another cross-sectional structure of a sensor assembly provided in an embodiment of the present application;

[0066] Figure 10 A schematic diagram of another cross-sectional structure of a sensor assembly provided in an embodiment of the present application;

[0067] Figure 11 A schematic diagram of a three-dimensional structure of a battery provided in an embodiment of the present application;

[0068] Figure 12 for Figure 11 A magnified schematic diagram of point A;

[0069] Figure 13 Another schematic diagram of the three-dimensional structure of the battery provided in an embodiment of the present application;

[0070] Figure 14 for Figure 13 A magnified schematic diagram of point B;

[0071] Figure 15 A schematic diagram of a cross-sectional structure of a battery provided in an embodiment of the present application;

[0072] Figure 16 A schematic diagram of another cross-sectional structure of a battery provided in an embodiment of the present application;

[0073] Figure 17 A schematic diagram of a three-dimensional structure of a battery provided in an embodiment of the present application;

[0074] Figure 18 for Figure 17 An enlarged schematic diagram of point C;

[0075] Figure 19 Another schematic diagram of the three-dimensional structure of the battery provided in an embodiment of the present application;

[0076] Figure 20 for Figure 19 An enlarged schematic diagram of point D;

[0077] Figure 21 A schematic diagram of a cross-sectional structure of a battery provided in an embodiment of the present application;

[0078] Figure 22 A schematic diagram of another cross-sectional structure of a battery provided in an embodiment of the present application;

[0079] Figure 23A schematic diagram of a three-dimensional structure of a battery provided in an embodiment of the present application;

[0080] Figure 24 for Figure 23 An enlarged schematic diagram of point E;

[0081] Figure 25 Another schematic diagram of the three-dimensional structure of the battery provided in an embodiment of the present application;

[0082] Figure 26 for Figure 25 An enlarged schematic diagram of point F;

[0083] Figure 27 A schematic diagram of a cross-sectional structure of a battery provided in an embodiment of the present application;

[0084] Figure 28 A schematic diagram of another cross-sectional structure of a battery provided in an embodiment of the present application;

[0085] Figure 29 A schematic diagram of another cross-sectional structure of a battery provided in an embodiment of the present application;

[0086] Figure 30 A schematic diagram of another cross-sectional structure of a battery provided in an embodiment of the present application;

[0087] Figure 31 A schematic diagram of another cross-sectional structure of a battery provided in an embodiment of the present application;

[0088] Figure 32 A schematic diagram of another cross-sectional structure of a battery provided in an embodiment of the present application;

[0089] Figure 33 A schematic diagram of a three-dimensional structure of a battery body in a battery provided in an embodiment of the present application;

[0090] Figure 34 A schematic diagram of a cross-sectional structure of a sensor assembly in a battery provided in an embodiment of the present application;

[0091] Figure 35 A schematic diagram of a structure in which the sensor assembly in the battery provided in an embodiment of the present application is arranged on the outer surface of the battery body;

[0092] Figure 36 This is another schematic diagram of the three-dimensional structure of the battery body in the battery provided in an embodiment of the present application;

[0093] Figure 37 This is another schematic cross-sectional view of a sensor assembly in a battery according to an embodiment of the present application;

[0094] Figure 38This is another structural schematic diagram of a battery provided in an embodiment of the present application in which the sensor assembly is arranged on the outer surface of the battery body.

[0095] Reference numerals:

[0096] 100-sensor assembly;

[0097] 110-Sensor;

[0098] 111-sensor body; 112-temperature detection point; 113-stress detection point;

[0099] 120-lead wire;

[0100] 1201 - first end of the lead wire; 1202 - second end of the lead wire;

[0101] 121-first part; 1211-first end of the first part; 1212-second end of the first part;

[0102] 122- second portion; 1221- first end of the second portion; 1222- second end of the second portion;

[0103] 130-Signal analysis and transmission board;

[0104] 141-pin; 142-jack;

[0105] 150-second plug-in converter; 160-third plug-in converter; 170-signal transmission harness;

[0106] 200-battery;

[0107] 210-battery body;

[0108] 220-positive electrode cover; 221-first opening;

[0109] 230 - negative electrode cover; 231 - second opening;

[0110] 240-positive electrode spacer; 250-negative electrode spacer;

[0111] 260-positive electrode tab; 270-negative electrode tab;

[0112] 280-positive pole; 290-negative pole. DETAILED DESCRIPTION

[0113] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0114] With the development of new energy, more and more fields are adopting new energy as a power source. Due to its advantages such as high energy density, rechargeable, safe and environmentally friendly, batteries are widely used in new energy vehicles, consumer electronics, energy storage systems and other fields.

[0115] Power batteries are the heart of new energy vehicles and are crucial to their development. However, with the rapid development of vehicle electrification, the safety of power batteries has attracted widespread attention.

[0116] During the cycling process, the temperature of power batteries evolves, and the volume of the battery core expands. Accurately monitoring the evolution of internal battery temperature and stress can better guide subsequent theoretical design of power batteries. However, current methods for monitoring the stress caused by internal battery core expansion are limited, and they mainly focus on testing the battery casing surface, which cannot achieve real-time monitoring of internal temperature and stress of power batteries.

[0117] For example, in related art, a battery includes a cell, a base, a cap, and a cylindrical shell. The base is fixed to the lower end of the shell, the cap is fixed to the upper end of the shell, the cell is inserted into the shell, and a PCB is provided at the bottom of the base. A temperature sensor and a pressure sensor are provided on the side of the PCB facing the interior of the shell. A data transmission line is connected to the PCB, and a through hole is provided in the base. One end of the data transmission line extends out of the shell through the through hole. However, when monitoring the internal temperature and stress of the battery, the sensor is provided on the PCB, and the actual monitoring is the temperature and pressure at the bottom of the battery, which cannot achieve real-time monitoring of the temperature and pressure inside the battery.

[0118] To address the aforementioned issues, embodiments of the present application provide a new sensor assembly, battery, battery pack, and electrical equipment. The sensor assembly includes a sensor, lead wires, and a signal analysis and transmission board. The sensor includes a sensor body and at least one detection point disposed on the sensor body. The sensor body is in the form of a thin sheet. The detection point is electrically connected to the first end of the lead wire, and the second end of the lead wire is electrically connected to the signal analysis and transmission board. The detection point is a temperature detection point or a stress detection point. The sensor assembly provided in embodiments of the present application can monitor the temperature or pressure inside the battery in real time, thereby improving the battery's safe use performance.

[0119] The sensor assembly provided in the embodiments of the present application and the battery, battery pack and electrical equipment having the sensor assembly are described in detail below with reference to the accompanying drawings.

[0120] Figure 1 A schematic diagram of the cross-sectional structure of a sensor assembly provided in an embodiment of the present application. Figure 2 Another schematic diagram of the cross-sectional structure of the sensor assembly provided in an embodiment of the present application. Figure 3 This is a schematic diagram of another cross-sectional structure of the sensor assembly provided in an embodiment of the present application. Figure 4 This is another schematic cross-sectional structure diagram of the sensor assembly provided in an embodiment of the present application. Figure 5 This is another schematic cross-sectional structure diagram of the sensor assembly provided in an embodiment of the present application.

[0121] Reference Figures 1 to 5 As shown, an embodiment of the present application provides a sensor component 100, which may include at least a sensor 110, a lead wire 120, and a signal analysis and transmission board 130. The sensor 110 may include a sensor body 111 and at least one detection point arranged on the sensor body 111, the detection point is electrically connected to the first end of the lead wire 120 (i.e., the first end 1201 of the lead wire), and the second end of the lead wire 120 (i.e., the second end 1202 of the lead wire) is electrically connected to the signal analysis and transmission board 130.

[0122] In the embodiment of the present application, the detection point may be a temperature detection point 112 or a stress detection point 113 .

[0123] By designing the sensor 110 to include a sensor body 111 and at least one detection point, the detection point is set on the sensor body 111. After the detection point on the sensor body 111 detects the temperature or pressure, the signal is transmitted to the signal analysis and transmission board 130 through the lead line 120 to process the temperature or pressure detected by the detection point.

[0124] Therefore, the sensor assembly 100 provided in the embodiment of the present application can monitor the temperature or pressure inside the battery in real time, thereby improving the safe use performance of the battery.

[0125] In the embodiment of the present application, the sensor 110 may be a thin film sensor. The sensor body 111 may be in the form of a thin sheet. The thin sheet-shaped sensor body 111 is easy to attach to the battery.

[0126] In the embodiment of the present application, the specific configuration of the detection points may include but is not limited to the following possible implementations:

[0127] In one possible implementation, the at least one detection point may include at least one temperature detection point 112, and each temperature detection point 112 is electrically connected to the first end of the lead wire 120. Thus, after the temperature detection point 112 on the sensor body 111 detects the temperature, the temperature signal is transmitted via the lead wire 120 to the signal analysis and transmission board 130 for processing the temperature detected by the temperature detection point 112.

[0128] Another possible implementation is that the at least one detection point may include at least one stress detection point 113, and each stress detection point 113 is electrically connected to the first end of the lead wire 120. In this way, after the stress detection point 113 on the sensor body 111 detects stress, the stress signal is transmitted via the lead wire 120 to the signal analysis and transmission board 130 for processing the stress detected by the stress detection point 113.

[0129] In another possible implementation, the at least one detection point may include at least one temperature detection point 112 and at least one stress detection point 113, with each temperature detection point 112 and each stress detection point 113 being electrically connected to the first end of the lead wire 120. In this way, after the temperature detection point 112 and the stress detection point 113 on the sensor body 111 detect the temperature and stress, the temperature and stress signals are transmitted via the lead wire 120 to the signal analysis and transmission board 130, which processes the temperature detected by the temperature detection point 112 and the stress detected by the stress detection point 113.

[0130] In some embodiments, the lead line 120 may be a strip line.

[0131] Alternatively, in some other embodiments, the lead wire 120 may also be a columnar wire.

[0132] In addition, in the embodiment of the present application, the specific structural design of the sensor 110, the lead wire 120, and the signal analysis and transmission board 130 may include but is not limited to the following possible implementations:

[0133] One possible implementation is: See Figure 1 As shown, the sensor 110, the lead wire 120 and the signal analysis and transmission board 130 can be an integrated structure. The integrated structure has high structural strength.

[0134] Another possible implementation is: Figure 2 As shown, the sensor 110 and the lead wire 120 are an integrated structure, and the lead wire 120 can be plugged and connected to the signal analysis and transmission board 130. In this case, the sensor assembly 100 has high portability.

[0135] Specifically, in the embodiment of the present application, one of the lead wire 120 and the signal analysis transmission board 130 may be provided with a pin 141, and the other of the lead wire 120 and the signal analysis transmission board 130 may be provided with a jack 142, and the pin 141 is inserted into the jack 142. For example, Figure 2 As shown, the lead wire 120 is provided with a pin 141 , the signal analysis and transmission board 130 is provided with a jack 142 , and the pin 141 is inserted into the jack 142 .

[0136] In some embodiments, the sensor assembly 100 may further include a first plug-in converter (not shown in the figure), one end of which may be electrically connected to the lead wire 120 , and the other end of which may be electrically connected to the signal analysis and transmission board 130 .

[0137] Another possible implementation is: Figure 3 As shown, the lead wire 120 and the signal analysis and transmission board 130 are an integrated structure, and the lead wire 120 can be plugged and connected to the sensor 110. In this case, the sensor assembly 100 has high portability.

[0138] Specifically, in the embodiment of the present application, a pin 141 may be provided on one of the lead wire 120 and the sensor 110 , and a socket 142 may be provided on the other of the lead wire 120 and the sensor 110 , and the pin 141 is inserted into the socket 142 .

[0139] In some embodiments, as Figure 3 As shown, the sensor assembly 100 may further include a second plug converter 150 , one end of the second plug converter 150 being electrically connected to the lead wire 120 , and the other end of the second plug converter 150 being electrically connected to the sensor 110 .

[0140] Another possible implementation is: Figure 4 As shown, the lead wire 120 is plugged in and connected to the signal analysis and transmission board 130, and the lead wire 120 is plugged in and connected to the sensor 110. In this way, the sensor assembly 100 is more portable.

[0141] Specifically, in the embodiment of the present application, one of the lead wire 120 and the signal analysis transmission board 130 may be provided with a pin 141, and the other of the lead wire 120 and the signal analysis transmission board 130 may be provided with a jack 142, and the pin 141 is inserted into the jack 142. For example, Figure 4 As shown, the lead wire 120 is provided with a pin 141 , the signal analysis and transmission board 130 is provided with a jack 142 , and the pin 141 is inserted into the jack 142 .

[0142] In some embodiments, a pin 141 may be provided on one of the lead wire 120 and the sensor 110 , and a socket 142 may be provided on the other of the lead wire 120 and the sensor 110 , and the pin 141 is inserted into the socket 142 .

[0143] In some embodiments, the sensor assembly 100 may further include a first plug-in converter, one end of which is electrically connected to the lead-out line 120 , and the other end of which is electrically connected to the signal analysis and transmission board 130 .

[0144] In some embodiments, as Figure 4 As shown, the sensor assembly 100 may further include a second plug converter 150, wherein one end of the second plug converter 150 is electrically connected to the lead wire 120, and the other end of the second plug converter 150 is electrically connected to the sensor 110. Figure 4 As shown, one end of the sensor 110 facing the lead wire 120 is connected to the signal transmission harness 170 , and the sensor 110 is electrically connected to one end of the second plug converter through the signal transmission harness 170 , and then the other end of the second plug converter is electrically connected to the lead wire 120 .

[0145] In some embodiments, as Figure 5 As shown, the lead wire 120 may include a first part 121 and a second part 122 that are independent of each other, wherein the sensor 110 and the first end of the first part 121 (i.e., the first end 1211 of the first part) are an integrated structure, the first end of the second part 122 (the first end 1221 of the second part) and the signal analysis and transmission board 130 are an integrated structure, and the second end of the first part 121 (the second end 1212 of the first part) and the second end of the second part 122 (the second end 1222 of the second part) are plugged into each other.

[0146] Continue to follow Figure 5 As shown, in the embodiment of the present application, a pin 141 may be provided on one of the second end of the first portion 121 and the second end of the second portion 122, and a socket 142 may be provided on the other of the second end of the first portion 121 and the second end of the second portion 122, and the pin 141 is inserted into the socket 142. For example, as Figure 5 As shown, a pin 141 is provided on the second end of the second part 122 , and a socket 142 is provided on the second end of the first part 121 , and the pin 141 is inserted into the socket 142 .

[0147] In the embodiments of this application, Figure 5As shown, the sensor assembly 100 may further include a third plug converter 160, wherein one end of the third plug converter 160 is electrically connected to the second end of the first part 121, and the other end of the third plug converter 160 is electrically connected to the second end of the second part 122. Figure 5 As shown, a pin 141 is provided on the second end of the second part 122 , and a socket 142 is provided on the third plug converter 160 located on the second end of the first part 121 , and the pin 141 is inserted into the socket 142 .

[0148] Figure 6 This is another schematic cross-sectional structure diagram of the sensor assembly 100 provided in an embodiment of the present application. Figure 7 This is another schematic cross-sectional structure diagram of the sensor assembly 100 provided in an embodiment of the present application. Figure 8 This is another schematic cross-sectional structure diagram of the sensor assembly 100 provided in an embodiment of the present application.

[0149] like Figures 6 to 8 As shown, the sensor 110 may include a sensor body 111 and multiple temperature detection points 112 and multiple stress detection points 113 arranged on the sensor body 111. The multiple temperature detection points 112 and multiple stress detection points 113 are electrically connected to the first end of the lead wire 120 through an electrical connection line.

[0150] The multiple temperature detection points 112 and the multiple stress detection points 113 on the sensor body 111 are distributed in an array. In actual application scenarios, the positions of the temperature detection points 112 or the stress detection points 113 can be adjusted according to the test requirements. First, according to the size of the specified sensor body 111, the number of detection points that need to be arranged is planned. Generally, the detection points of the sensor body 111 are arranged at the intersection of the electrical connection lines. The surrounding positions of the sensor body 111 are used to pull the electrical connection lines, and no detection points are arranged. The distance between the outer edge of the electrical connection line and the outer edge of the sensor body 111 can be between 0.5cm and 2cm. In addition, the detection points are generally designed at the intersection between the lines. In addition, the interval between two adjacent detection points can be between 0.5cm and 20cm, and the number of detection points can be between 1 and 5000.

[0151] In addition, if Figures 6 to 8As shown, the temperature detection points 112 and the stress detection points 113 can be randomly designed and distributed or designed at intervals according to the test requirements. For example, the stress detection points 113 can be arranged at both ends and the temperature detection points 112 can be arranged in the middle, so as to achieve the purpose of measuring temperature in the middle and stress at both ends; or the stress detection points 113 can be arranged at one end and the temperature detection points 112 can be arranged at the other end, so as to achieve the purpose of measuring stress at one end and measuring temperature at the other end; or the temperature detection points 112 and the stress detection points 113 can be arranged near the same position at the same time to achieve the purpose of simultaneously monitoring the temperature and stress near the same position.

[0152] Figure 9 This is another schematic cross-sectional structure diagram of the sensor assembly 100 provided in an embodiment of the present application.

[0153] Figure 10 This is another schematic cross-sectional structure diagram of the sensor assembly 100 provided in an embodiment of the present application.

[0154] See also Figures 6 to 8 As shown, in the embodiment of the present application, multiple detection points can form an array area, and the array area can be divided into X areas in the length direction of the array area, and the array area can be divided into Y areas in the width direction of the array area, so that the array area is divided into X*Y sub-areas.

[0155] In the embodiment of the present application, temperature detection points 112 or stress detection points 113 are set in at least some of the X*Y sub-areas.

[0156] In some embodiments, a temperature detection point 112 or a stress detection point 113 may be provided in the middle of the array area. When the sensor 110 is attached to a battery, the middle of the array area is generally the middle area of ​​the battery. The temperature detection point 112 or the stress detection point 113 is provided in the middle area of ​​the battery to better collect the temperature or stress of the key area of ​​the battery.

[0157] Alternatively, in some other embodiments, the ends of the array area may be provided with temperature detection points 112 or stress detection points 113. When the sensor 110 is attached to the battery, the ends of the array area are generally the tab area of ​​the battery. Since the tab area has a higher temperature and is subjected to greater stress, the temperature detection points 112 or stress detection points 113 are provided in the tab area of ​​the battery to better collect the temperature or stress in the tab area.

[0158] It can be understood that, in the embodiment of the present application, a temperature detection point 112 or a stress detection point 113 can be set in each sub-area.

[0159] It should be noted that the location and number of the temperature detection points 112 and the stress detection points 113 can be flexibly set or selected according to the requirements of the actual application scenario. The embodiments of the present application are not limited to this, nor are they limited to the above examples.

[0160] Here combined Figure 9 and Figure 10 The design rules for selecting the positions of the multiple detection points on the sensor body 111 are introduced. Figure 9 As shown, the size of the battery body is determined, specifically, the length X and width Y of the sensor body 111 provided on the battery body are determined. The length X of the battery body may range from 1 cm to 120 cm, and the width Y of the battery body may range from 1 cm to 120 cm.

[0161] In some embodiments, if X is greater than Y, for example, the sensor body 111 can be divided into 6 equal areas in the length direction, and the distance between each area is X / 6, and the sensor body 111 can be divided into 3 equal areas in the width direction, and the distance between each area is Y / 3. Combining the divisions in the length and width directions, the sensor body 111 can be divided into 18 areas (see Figure 9 At least one detection point may be arranged in each area, and the detection point may be a temperature detection point 112 or a stress detection point 113.

[0162] In some embodiments, if the number of detection points needs to be further reduced, at least one detection point can be arranged only in key areas such as Zone 1, Zone 7, Zone 13, Zone 6, Zone 12, Zone 18, Zone 3, Zone 9, Zone 15, Zone 4, Zone 10, and Zone 16. This detection point can be either a temperature detection point 112 or a stress detection point 113. If the number of detection points needs to be further reduced, detection points can be arranged only in Zones 7, Zone 9, Zone 10, and Zone 12. This detection point can be either a temperature detection point 112 or a stress detection point 113.

[0163] In some embodiments, if X is equal to Y, the number of regions divided in the length and width directions is the same, so Figure 10 As shown in the example, the sensor body 111 can be divided into nine zones. At least one detection point needs to be arranged within each zone. This detection point can be either a temperature detection point 112 or a stress detection point 113. Similarly, if X is smaller than Y, the sensor body 111 can be divided into three zones in the X direction and six zones in the Y direction to design and arrange the detection points.

[0164] In the embodiment of the present application, at least a portion of the outer surface of the sensor 110 may be provided with an anti-corrosion layer. In other words, the surface of the sensor 110 may be coated and modified.

[0165] The anti-corrosion layer may include a first anti-corrosion layer. Specifically, a layer of polymer film material may be provided on the surface of the sensor 110. The polymer film material has an anti-electrolyte corrosion effect. The polymer film material may be, for example, polyimide or polyethylene.

[0166] The thickness of the polymer film material may be 0.05 mm to 1.5 mm. For example, the thickness of the polymer film material may be 0.05 mm, 0.1 mm, 0.5 mm, 1 mm, 1.5 mm, etc., which is not limited to the above examples in the present application.

[0167] In addition, the anti-corrosion layer may further include a second anti-corrosion layer, which may be a hydrophobic, breathable membrane. For example, a second hydrophobic, breathable membrane may be provided on the surface of the sensor body 111. The hydrophobic, breathable membrane may be, for example, an aluminum-plastic film. This can address the issue of electrolyte corrosion when the sensor body 111 is embedded in a battery.

[0168] The thickness of the hydrophobic breathable membrane can be 0.03 mm to 1 mm. For example, the thickness of the hydrophobic breathable membrane can be 0.03 mm, 0.05 mm, 0.1 mm, 0.3 mm, 0.5 mm or 1 mm, etc., which is not limited to the above examples in the present application.

[0169] In this embodiment of the present application, the sensor body 111 may be encased in a second anti-corrosion layer. The second anti-corrosion layer is provided on the upper and lower surfaces of the sensor body 111. The length and width of the second anti-corrosion layer are slightly larger than the length and width of the sensor body 111. The excess second anti-corrosion layer can be heat-sealed from top to bottom to further seal the gaps around the sensor body 111.

[0170] Figure 11 A schematic diagram of the three-dimensional structure of a battery provided in an embodiment of the present application. Figure 12 for Figure 11 A magnified schematic diagram of . Figure 13 Another schematic diagram of the three-dimensional structure of the battery provided in an embodiment of the present application. Figure 14 for Figure 13 Enlarged schematic diagram of point B. Figure 15 A schematic diagram of the cross-sectional structure of a battery provided in an embodiment of the present application. Figure 16 This is another schematic diagram of the cross-sectional structure of the battery provided in an embodiment of the present application.

[0171] Reference Figures 11 to 16As shown, the embodiment of the present application further provides a battery 200, which may include at least a battery body 210 and the aforementioned sensor assembly 100. The sensor 110 of the sensor assembly 100 may be attached to at least a portion of the outer surface of the battery body 210. In other words, the sensor 110 may be attached to the entire outer surface of the battery body 210, or may be attached to only a portion of the outer surface of the battery body 210.

[0172] It should be noted that, in the embodiment of the present application, the battery body 210 may be a pole core.

[0173] In the embodiments of this application, Figure 15 and Figure 16 As shown, the battery 200 may further include a positive electrode cover plate 220 and a negative electrode cover plate 230 , wherein the positive electrode cover plate 220 or the negative electrode cover plate 230 may be provided with an opening for allowing the lead wire 120 of the sensor assembly 100 to pass through.

[0174] The battery 200 may also include a positive electrode spacer 240, a negative electrode spacer 250, a positive electrode tab 260, a negative electrode tab 270, a positive electrode column 280 and a negative electrode column 290, wherein the positive electrode spacer 240, the positive electrode tab 260 and the positive electrode column 280 are arranged between the battery body 210 and the positive electrode cover 220, and the negative electrode spacer 250, the negative electrode tab 270, and the negative electrode column 290 are arranged between the battery body 210 and the negative electrode cover 230.

[0175] In an embodiment of the present application, the shape of the opening can match the cross-sectional shape of the lead wire 120, or the shape of the opening can match the cross-sectional shape of the first plug-in converter in the sensor assembly 100, or the shape of the opening can match the cross-sectional shape of the second plug-in converter 150 in the sensor assembly 100, or the shape of the opening can match the cross-sectional shape of the third plug-in converter 160 in the sensor assembly 100.

[0176] For example, Figure 16 As shown, the positive electrode cover plate 220 is provided with a first opening 221 for allowing the lead wire 120 of the sensor assembly 100 to pass through. The shape of the first opening 221 matches the cross-sectional shape of the lead wire 120.

[0177] Reference Figures 11 to 14 As shown, the lead wire 120 in the sensor assembly 100 is a strip line. When the sensor 110 is built into the battery 200, the sensor body 111 in the sensor 110 is attached to the outer surface of the battery body 210 inside the battery 200, and the lead wire 120 in the sensor assembly 100 is led out from the positive electrode cover 220 side.

[0178] In the embodiment of the present application, the overall size of the sensor body 111 may be slightly smaller than the overall size of the battery body 210. This helps to achieve a better fitting effect.

[0179] In the embodiment of the present application, the lead wire 120 of the sensor 110 can be designed to be led out from the side of the battery 200. This can prevent the lead wire 120 of the sensor 110 from interfering with the folding of the battery tab 200. In addition, it is understood that if the lead wire 120 is led out from the positive side of the battery 200, the lead wire 120 can be led out from the side of the battery 200 away from the injection hole and can be designed on the side of the positive cover 220 of the battery 200 away from the injection hole. If the lead wire 120 is led out from the negative side of the battery 200, the lead wire 120 can be led out from the side of the battery 200 away from the explosion-proof valve and can be designed on the side of the negative cover 230 of the battery 200 away from the explosion-proof valve.

[0180] After determining the lead-out position of the lead-out wire 120, the cover of the battery 200 can be opened. Figure 16 As shown, for example, a first opening 221 may be opened at the middle position of one side of the positive electrode cover plate 220 , and the shape of the first opening 221 may match the shape of the strip-shaped lead wire 120 .

[0181] In the embodiment of the present application, the length dimension of the first opening 221 can be between 0.2 cm and 2.2 cm, and the width dimension of the first opening 221 can be between 0.1 mm and 3.5 mm. In addition, the length dimension and width dimension of the first opening 221 should be slightly larger than the size of the strip-shaped lead-out wire 120 to facilitate the smooth lead-out of the strip-shaped lead-out wire 120.

[0182] In addition, in the embodiment of the present application, a sealing ring that matches the shape of the first opening 221 can be provided in the first opening 221 on the positive electrode cover plate 220. Specifically, a strip-shaped sealing ring is built into the first opening 221, allowing the lead wire 120 of the sensor 110 to pass through the sealing ring and lead to the outside of the battery 200. This can prevent leakage of the electrolyte inside the battery 200 and ensure the sealing of the battery 200. It should be noted that the sealing ring can be a rubber sealing ring.

[0183] In addition, in the embodiment of the present application, a sealing material may be provided in the narrow gap between the first opening 221 and the strip-shaped lead wire 120. For example, a corrosion-resistant adhesive material may be provided in the narrow gap between the first opening 221 and the strip-shaped lead wire 120 to fill and seal the gap. This further ensures the sealing performance. It should be noted that the corrosion-resistant adhesive material may be a high-temperature epoxy adhesive or a polyimide adhesive, for example.

[0184] Figure 17A schematic diagram of a three-dimensional structure of a battery 200 provided in an embodiment of the present application. Figure 18 for Figure 17 Enlarged schematic diagram of point C. Figure 19 This is another schematic diagram of the three-dimensional structure of the battery 200 provided in an embodiment of the present application. Figure 20 for Figure 19 Enlarged schematic diagram of point D. Figure 21 A schematic diagram of a cross-sectional structure of a battery 200 provided in an embodiment of the present application. Figure 22 This is another schematic diagram of the cross-sectional structure of the battery 200 provided in an embodiment of the present application.

[0185] Reference Figures 17 to 20 As shown, the lead wire 120 in the sensor assembly 100 is a columnar wire. When the sensor 110 is built into the battery 200, the sensor body 111 in the sensor 110 is attached to the outer surface of the battery body 210 inside the battery 200, and the lead wire 120 in the sensor assembly 100 is led out from the positive electrode cover 220. Compared with the sensor body 111 with a strip-shaped lead wire 120, when the sensor 110 with a columnar wire lead wire 120 is built into the battery 200, when the first opening 221 matching the columnar wire is opened on the positive electrode cover 220, the columnar wire is cylindrical, as an example. Figure 21 and Figure 22 As shown, the first opening 221 may be a circular hole, and the diameter of the first opening 221 may be between 0.1 cm and 1.3 cm. Meanwhile, the sealing ring may also be designed to be circular.

[0186] Figure 23 A schematic diagram of a three-dimensional structure of a battery 200 provided in an embodiment of the present application. Figure 24 for Figure 23 Enlarged schematic diagram of point E. Figure 25 This is another schematic diagram of the three-dimensional structure of the battery 200 provided in an embodiment of the present application. Figure 26 for Figure 25 Enlarged schematic diagram of point F. Figure 27 A schematic diagram of a cross-sectional structure of a battery 200 provided in an embodiment of the present application. Figure 28 This is another schematic diagram of the cross-sectional structure of the battery 200 provided in an embodiment of the present application.

[0187] Reference Figures 23 to 26 As shown, the lead wire 120 in the sensor assembly 100 includes a first part 121 and a second part 122, and the first part 121 and the second part 122 are electrically connected through a third plug-in converter 160. When the sensor 110 is built into the battery 200, the sensor body 111 in the sensor 110 is attached to the outer surface of the battery body 210 inside the battery 200, and the lead wire 120 in the sensor assembly 100 is led out from the side of the positive electrode cover 220.

[0188] At this time, as Figure 27 and Figure 28 shown, when opening the first opening 221 on the positive electrode cover plate 220, the shape of the first opening 221 can match the shape of the third plug-in converter. Specifically, when the shape of the third plug-in converter is square, the first opening 221 is designed as a square hole.

[0189] In the embodiment of the present application, the size of the first opening 221 is slightly larger than the size of the third plug-in converter. The third plug-in converter needs to be fully or partially embedded into the first opening 221 on the positive electrode cover plate 220, and sealing is done around the third plug-in converter. Specifically, a sealing ring and anti-corrosion glue can be used for sealing.

[0190] Figure 29 Another cross-sectional structure diagram of the battery 200 provided by the embodiment of the present application. Figure 30 Another cross-sectional structure diagram of the battery 200 provided by the embodiment of the present application.

[0191] Figure 29 and Figure 30 shown in the battery 200, the lead wire 120 of the sensor component 100 is led out from the side of the negative electrode cover plate 230 of the battery 200. Refer to Figure 30 shown, a second opening 231 is provided on the negative electrode cover plate 230, and the lead wire 120 passes through the second opening 231.

[0192] It is easy to understand that, according to the portability of actual operation and testing, a suitable side can be selected for leading out, and the embodiment of the present application does not limit this.

[0193] Figure 31 Another cross-sectional structure diagram of the battery 200 provided by the embodiment of the present application. Figure 32 Another cross-sectional structure diagram of the battery 200 provided by the embodiment of the present application.

[0194] In the embodiment of the present application, in addition to collecting the temperature and stress of the entire battery body 210, the sensor body 111 can be further improved and designed into a structure of other shapes. Refer to Figure 31 shown, the sensor body 111 is in the shape of a "mountain". When the sensor 110 in the shape of a "mountain" is placed inside the battery 200, only the temperature and stress of the "mountain"-shaped area corresponding to the battery body 210 are collected. Or, refer to Figure 32 shown, the sensor body 111 is in the shape of a "king". When the sensor 110 in the shape of a "king" is placed inside the battery 200, only the temperature and stress of the "king"-shaped area corresponding to the battery body 210 are collected.

[0195] It is understandable that these improved design structures can only collect the temperature and stress at key locations on the surface of the battery body 210, which is also helpful in guiding the subsequent design of the battery 200.

[0196] In addition, it can be understood that the above-mentioned sensor 110 is tested by being tightly attached to the surface of the battery body 210. If the sensor 110 is simplified and improved, and a sensor 110 with fewer collection points is designed (such as single-point collection, double-point collection, etc.), the miniaturized sensor 110 can also be directly inserted into the interior of the battery 200 to monitor the evolution of the actual temperature and stress inside the battery 200 core.

[0197] Figure 33 A schematic diagram of the three-dimensional structure of the battery body 210 in the battery 200 provided in an embodiment of the present application. Figure 34 A schematic cross-sectional structure diagram of the sensor assembly 100 in the battery 200 provided in an embodiment of the present application. Figure 35 This is a structural diagram of a battery 200 provided in an embodiment of the present application in which the sensor assembly 100 is disposed on the outer surface of the battery body 210 .

[0198] See also Figures 33 to 35 As shown, when the sensor 110 is built into the cylindrical battery 200, the sensor body 111 is designed as Figure 34 The lead wire 120 is led out from one side of the cylindrical battery 200 in the rectangular structure.

[0199] In the embodiment of the present application, the length of the sensor body 111 can be the circumference of the battery body 210 in the cylindrical battery 200, and the width of the sensor body 111 can be the height of the battery body 210 in the cylindrical battery 200. The sensor 110 is wrapped around the battery body 210, and the lead wire 120 can be led out through the edge of the positive electrode side of the cylindrical battery 200. The design of the detection point in the sensor assembly 100 and the connection method between the lead wire 120 and the cover plate can be customized according to the detection requirements, and the embodiment of the present application is not limited to this.

[0200] Figure 36 This is another schematic diagram of the three-dimensional structure of the battery body 210 in the battery 200 provided in an embodiment of the present application. Figure 37 This is another schematic cross-sectional structure diagram of the sensor assembly 100 in the battery 200 provided in an embodiment of the present application. Figure 38 This is another structural schematic diagram of a battery 200 provided in an embodiment of the present application when the sensor assembly 100 is disposed on the outer surface of the battery body 210 .

[0201] See also Figures 36 to 38As shown, when the sensor 110 is built into the square battery 200, the sensor body 111 can be designed as Figure 37 The lead wire 120 is led out from one side of the square battery 200.

[0202] In the embodiment of the present application, the dimensions of the sensor body 111 can be designed to be the same as the length and width of the battery body 210, and the lead wire 120 can be designed to be located in the middle of the sensor 110. The sensor 110 is in close contact with the surface of the battery body 210, and the lead wire 120 is led out through the opening of the cover. The design of the detection point of the sensor 110 and the connection between the lead wire 120 and the cover can be customized according to the detection requirements and are not limited by the embodiment of the present application.

[0203] By disposing the above-mentioned sensor assembly 100 in the battery 200 , the sensor assembly 100 can monitor the temperature or pressure inside the battery 200 in real time, thereby improving the safe use performance of the battery 200 .

[0204] In addition, an embodiment of the present application further provides a battery pack, which may include at least the above-mentioned battery 200.

[0205] The embodiment of the present application can improve the performance of the battery pack by providing the above-mentioned battery 200 in the battery pack.

[0206] In addition, an embodiment of the present application further provides an electric device, which may at least include the above-mentioned battery pack or the above-mentioned battery pack.

[0207] The electrical equipment of the present invention can be conventional electrical equipment in the field, such as power equipment (such as electric vehicles), electronic equipment (such as computers, mobile phones, digital cameras, printers, fax machines, etc.), wearable devices (such as watches, bracelets, VR glasses, etc.), household appliances (such as air conditioners, refrigerators, washing machines, microwave ovens, etc.), etc., without special restrictions.

[0208] Taking the electrical device as a vehicle as an example, the vehicle may be a car, a bus, or a truck. For example, the vehicle may be an electric vehicle (EV), a pure electric vehicle (PEV / BEV), a hybrid electric vehicle (HEV), a range-extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), a new energy vehicle (NEV), or any vehicle having a battery 200.

[0209] The vehicle may further include a vehicle body, an axle, and a motor, wherein the battery pack 200, the axle, and the motor may all be disposed on the vehicle body. The battery pack 200 may be electrically connected to the motor, which may be connected to the axle. The battery pack 200 may power the motor to rotate, which in turn may drive the axle to rotate, thereby enabling the vehicle to travel.

[0210] The vehicle body may include a vehicle chassis and a vehicle body mounted on the chassis. The vehicle body may include a passenger compartment, which may include a driver's seat and passenger seats. The driver may operate the vehicle from the driver's seat. For example, the vehicle body may also include a steering wheel, clutch, brake, and other structural components that enable the vehicle to function fully, although this application does not limit this.

[0211] The embodiment of the present application can improve the performance of the electrical equipment by providing the above-mentioned battery 200 in the electrical equipment.

[0212] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0213] In the description of the present invention, it is to be understood that the terms "may include" and "have" and any variations thereof used herein are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0214] Unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," "fixed," etc. should be interpreted broadly. For example, they may refer to fixed or removable connections, or integration. They may be directly connected or indirectly connected through an intermediate medium. They may also refer to internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances. Furthermore, the terms "first," "second," etc., etc., are used for descriptive purposes only and should not be construed to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated.

[0215] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents, and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sensor assembly, characterized in that: At least: Sensors, lead wires, and signal analysis and transmission boards; The sensor comprises: a sensor body and at least one detection point arranged on the sensor body; The detection point is electrically connected to the first end of the lead wire, and the second end of the lead wire is electrically connected to the signal analysis and transmission board; The detection point is a temperature detection point or a stress detection point.

2. The sensor assembly according to claim 1, wherein The at least one detection point includes: at least one temperature detection point and / or at least one stress detection point.

3. The sensor assembly according to claim 2, wherein: There are multiple temperature detection points and multiple stress detection points; the multiple temperature detection points and the multiple stress detection points are distributed in an array.

4. The sensor assembly according to claim 2, wherein: The plurality of detection points form an array area, the array area is divided into X areas in the length direction of the array area, and the array area is divided into Y areas in the width direction of the array area, so that the array area is divided into X*Y sub-areas; The temperature detection points or the stress detection points are set in at least some of the sub-areas among the X*Y sub-areas.

5. The sensor assembly according to claim 4, wherein: The temperature detection point or the stress detection point is provided at the middle of the array area; and / or the temperature detection point or the stress detection point is provided at the end of the array area.

6. The sensor assembly according to claim 4, wherein: The temperature detection point or the stress detection point is set in each of the sub-areas.

7. The sensor assembly according to claim 1, wherein: The sensor body is in a thin sheet shape.

8. The sensor assembly according to claim 1, wherein: The lead wire is a strip line; or, the lead wire is a column line.

9. The sensor assembly according to any one of claims 1 to 8, characterized in that: The sensor, the lead wire and the signal analysis and transmission board are an integrated structure.

10. The sensor assembly according to any one of claims 1 to 8, characterized in that: The sensor and the lead wire are an integrated structure; The lead-out wire is plug-connected to the signal analysis and transmission board.

11. The sensor assembly according to claim 10, wherein: One of the lead-out line and the signal analysis and transmission board is provided with a pin, and the other of the lead-out line and the signal analysis and transmission board is provided with a jack; the pin is inserted into the jack.

12. The sensor assembly according to claim 10, wherein: Also includes: a first plug-in converter; One end of the first plug-in converter is electrically connected to the lead wire, and the other end of the first plug-in converter is electrically connected to the signal analysis and transmission board.

13. The sensor assembly according to any one of claims 1 to 8, characterized in that: The lead wire and the signal analysis and transmission board are an integrated structure; The lead wire is plug-connected to the sensor.

14. The sensor assembly according to claim 13, wherein: One of the lead wire and the sensor is provided with a pin, and the other of the lead wire and the sensor is provided with a jack; the pin is inserted into the jack.

15. The sensor assembly according to claim 13, wherein: Also includes: a second plug adapter; One end of the second plug-in converter is electrically connected to the lead wire, and the other end of the second plug-in converter is electrically connected to the sensor.

16. The sensor assembly according to any one of claims 1 to 8, characterized in that: The lead wire is plug-connected to the signal analysis and transmission board, and the lead wire is plug-connected to the sensor.

17. The sensor assembly according to claim 16, wherein: One of the lead wire and the signal analysis and transmission board is provided with a pin, and the other of the lead wire and the signal analysis and transmission board is provided with a jack; the pin is inserted into the jack; And / or, one of the lead wire and the sensor is provided with a pin, and the other of the lead wire and the sensor is provided with a jack; the pin is inserted into the jack; And / or, further comprising: a first plug-in converter; one end of the first plug-in converter is electrically connected to the lead wire, and the other end of the first plug-in converter is electrically connected to the signal analysis and transmission board; And / or, further comprising: a second plug-in converter; one end of the second plug-in converter is electrically connected to the lead wire, and the other end of the second plug-in converter is electrically connected to the sensor.

18. The sensor assembly according to any one of claims 1 to 8, characterized in that: The lead-out line comprises a first part and a second part which are independent of each other; The sensor and the first end of the first part are an integrated structure, and the first end of the second part and the signal analysis and transmission board are an integrated structure; The second end of the first part is plug-connected with the second end of the second part.

19. The sensor assembly according to claim 18, wherein One of the second end of the first part and the second end of the second part is provided with a pin, and the other of the second end of the first part and the second end of the second part is provided with a socket; the pin is inserted into the socket.

20. The sensor assembly according to claim 18, wherein It also includes: a third plug converter; one end of the third plug converter is electrically connected to the second end of the first part, and the other end of the third plug converter is electrically connected to the second end of the second part.

21. The sensor assembly according to any one of claims 1 to 8, characterized in that: At least a portion of the outer surface of the sensor is provided with an anti-corrosion layer.

22. The sensor assembly according to claim 21, wherein The anti-corrosion layer includes a first anti-corrosion layer; the first anti-corrosion layer is provided on the outer surface of the sensor; The first anti-corrosion layer is made of a polymer film material.

23. The sensor assembly according to claim 22, wherein: The polymer film material is polyimide or polyethylene.

24. The sensor assembly according to claim 22, wherein: The anti-corrosion layer further includes a second anti-corrosion layer; the sensor body is coated in the second anti-corrosion layer; The second anti-corrosion layer is a hydrophobic breathable membrane.

25. The sensor assembly according to claim 24, wherein The hydrophobic breathable film is an aluminum-plastic film.

26. A battery, characterized in that: At least comprising a battery body and the sensor assembly according to any one of claims 1 to 25; The sensor of the sensor assembly is attached to at least a portion of the outer surface of the battery body.

27. The battery according to claim 26, characterized in that Also includes: A positive electrode cover plate and a negative electrode cover plate; the positive electrode cover plate or the negative electrode cover plate is provided with an opening for allowing the lead wire of the sensor assembly to pass through.

28. The battery according to claim 27, characterized in that The shape of the opening matches the cross-sectional shape of the lead wire; or, the shape of the opening matches the cross-sectional shape of the first plug-in converter in the sensor assembly; or, the shape of the opening matches the cross-sectional shape of the second plug-in converter in the sensor assembly; or, the shape of the opening matches the cross-sectional shape of the third plug-in converter in the sensor assembly.

29. The battery according to claim 27, characterized in that A sealing ring is provided on the inner wall of the opening, and the sealing ring is located between the opening and the lead-out wire.

30. The battery according to claim 29, characterized in that Sealing material is filled between the sealing ring and the lead wire.

31. A battery pack, characterized in that: At least comprising the battery according to any one of claims 26 to 30.

32. An electrical device, characterized in that: At least comprising the battery of any one of claims 26-30 or the battery pack of claim 31.

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