Battery and battery pack

Abstract

The utility model discloses a battery and a battery pack, and belongs to the technical field of batteries, the battery comprises a shell, the shell comprises a bottom wall and a peripheral wall which are connected, the peripheral wall surrounds the bottom wall, and the bottom wall and the peripheral wall define a containing cavity with an opening; the top cover assembly covers the opening; the electrode assembly is arranged in the accommodating cavity, and the electrode assembly comprises a battery cell body and an insulating layer wrapping the outer side of the battery cell body; the first monitoring assembly is arranged in the containing cavity, the first monitoring assembly is located between the bottom wall and the electrode assembly, the first monitoring assembly is connected with the insulating layer in a hot melting mode and attached to the bottom wall, and the first monitoring assembly is used for monitoring at least one of the temperature and the pressure in the containing cavity. According to the invention, the internal temperature and pressure change of the battery can be monitored in time, and the timeliness and accuracy of battery abnormal condition monitoring are improved.

Description

Technical Field

[0001] This application belongs to the technical field of batteries, and particularly relates to a battery and a battery pack. Background Art

[0002] Timely monitoring of abnormal conditions during battery use is one of the important measures to improve battery usage safety. Common monitoring methods include attaching temperature measuring devices such as thermocouples to the outer side of the battery to monitor the surface temperature change of the battery in real time.

[0003] In actual use, from the occurrence of an abnormal problem in the battery to the occurrence of thermal runaway, it is a process of gradually rising temperature and pressure. It takes a certain amount of time for the temperature change to be conducted through the battery housing to the temperature measuring device for sensing. Therefore, the sensing of the temperature measuring device has a lag, and the timeliness and accuracy of monitoring battery abnormal conditions are relatively poor. Utility Model Content

[0004] Utility Model Objective: The embodiments of this application provide a battery, aiming to solve the above technical problems; another objective of this application is to provide a battery pack applying the above battery.

[0005] Technical Solution: A battery described in the embodiments of this application includes:

[0006] A housing, the housing includes a connected bottom wall and a peripheral wall, the peripheral wall surrounds the bottom wall, and the bottom wall and the peripheral wall enclose a receiving cavity with an opening;

[0007] A top cover assembly, the top cover assembly covers the opening;

[0008] An electrode assembly, the electrode assembly is disposed in the receiving cavity, the electrode assembly includes a cell body and an insulating layer coated on the outer side of the cell body;

[0009] A first monitoring assembly, the first monitoring assembly is disposed in the receiving cavity, the first monitoring assembly is located between the bottom wall and the electrode assembly, and the first monitoring assembly is heat-melt connected to the insulating layer and fits against the bottom wall, and the first monitoring assembly is used to monitor at least one of the temperature and pressure in the receiving cavity.

[0010] In some embodiments, the first monitoring assembly includes a first insulating portion, a first sensing portion integrated in the first insulating portion, and a first wiring portion connected to the first sensing portion. The first insulating portion is heat-melt connected to the insulating layer, the first wiring portion protrudes from the first insulating portion, the first sensing portion is used to monitor at least one of the temperature and pressure in the receiving cavity, and the first wiring portion is used to connect to a signal receiving end outside the receiving cavity and output at least one of a temperature signal and a pressure signal.

[0011] In some embodiments, the first insulating portion includes a first encapsulation layer and a second encapsulation layer connected to each other. The first encapsulation layer and the second encapsulation layer cover the outside of the first sensing portion. The first encapsulation layer is thermally fused to the insulating layer, and the second encapsulation layer is connected to the bottom wall.

[0012] The first sensing portion includes a first electrode layer and a first sensing layer connected to each other, and the first wiring portion is connected to the first electrode layer.

[0013] In some embodiments, the battery further includes:

[0014] A second monitoring component, which is disposed in the accommodation cavity and connected to the top cover assembly. The second monitoring component is used to monitor at least one of the temperature and pressure in the accommodation cavity.

[0015] In some embodiments, the top cover assembly includes a cover body and an insulating member connected to the cover body. The insulating member is located on the side of the cover body facing the electrode assembly. The second monitoring component is connected to the insulating member and is located on the side of the insulating member facing the electrode assembly.

[0016] In some embodiments, the battery further includes a terminal post, which sequentially passes through the cover body and the insulating member, and the terminal post is connected to the electrode assembly;

[0017] The insulating member is provided with a boss extending towards the electrode assembly. The boss abuts against the end face of the electrode assembly facing the cover body, and the second monitoring component is located between the terminal post and the boss.

[0018] In some embodiments, the second monitoring component includes a second insulating portion, a second sensing portion integrated in the second insulating portion, and a second wiring portion connected to the second sensing portion. The second insulating portion is thermally fused to the insulating member. The second wiring portion protrudes from the second insulating portion. The second sensing portion is used to monitor at least one of the temperature and pressure in the accommodation cavity, and the second wiring portion is used to connect to a signal receiving end outside the accommodation cavity and output at least one of a temperature signal and a pressure signal.

[0019] In some embodiments, the second insulating portion includes a third encapsulation layer and a fourth encapsulation layer connected to each other. The third encapsulation layer and the fourth encapsulation layer cover the outside of the second sensing portion. The third encapsulation layer is thermally fused to the insulating member;

[0020] The second sensing portion includes a second electrode layer and a second sensing layer connected to each other, and the second wiring portion is connected to the second electrode layer.

[0021] In some embodiments, the battery has a first direction, and the top cover assembly, the electrode assembly, and the first monitoring assembly are arranged along the first direction. The thickness of the first monitoring assembly in the first direction is a, satisfying a ≤ 2 mm;

[0022] and / or, the thickness of the second monitoring assembly in the first direction is b, satisfying b ≤ 2 mm.

[0023] Correspondingly, a battery pack according to an embodiment of the present application includes the above-mentioned battery.

[0024] Beneficial effects: The battery of the embodiment of the present application includes a housing, a top cover assembly, an electrode assembly, and a first monitoring assembly. The housing includes a connected bottom wall and a peripheral wall. The peripheral wall surrounds the bottom wall, and the bottom wall and the peripheral wall enclose a receiving cavity with an opening; the top cover assembly covers the opening; the electrode assembly is disposed in the receiving cavity, and the electrode assembly includes a battery cell body and an insulating layer covering the outside of the battery cell body; the first monitoring assembly is disposed in the receiving cavity and located between the bottom wall and the electrode assembly. The first monitoring assembly is heat-melted to connect to the insulating layer and is attached to the bottom wall. The first monitoring assembly is used to monitor at least one of the temperature and pressure in the receiving cavity. On the one hand, the first monitoring assembly of the present application is arranged inside the receiving cavity, which is beneficial to timely monitor the changes in the internal temperature and / or pressure of the battery, improving the timeliness and accuracy of monitoring abnormal conditions of the battery. On the other hand, by disposing the first monitoring assembly between the bottom wall and the electrode assembly and heat-melting it to connect to the insulating layer, it forms a support and attachment to the electrode assembly, which is further beneficial to timely monitor the abnormal conditions of the electrode assembly. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 is an exploded structural schematic diagram of the top cover assembly, the housing, the first monitoring assembly, and the electrode assembly according to an embodiment of the present application;

[0027] Figure 2 is a schematic cross-sectional structure diagram of the interior of the battery according to an embodiment of the present application;

[0028] Figure 3 is Figure 2 a partial enlarged view of part A in

[0029] Figure 4 is a structural schematic diagram of the top cover assembly according to an embodiment of the present application;

[0030] Figure 5 isFigure 4 Partial sectional view along line B-B;

[0031] Figure 6 Schematic structural views of the first monitoring component and the second monitoring component of the embodiments of the present application;

[0032] Reference numerals: 1, housing; 10, bottom wall; 11, peripheral wall; 12, accommodation cavity; 13, opening; 2, top cover assembly; 20, cover body; 21, insulating member; 210, boss; 22, pole column; 23, explosion-proof valve; 3, electrode assembly; 30, battery cell body; 31, insulating layer; 4, first monitoring component; 40, first insulating portion; 400, first encapsulation layer; 401, second encapsulation layer; 41, first sensing portion; 410, first electrode layer; 411, first sensing layer; 42, first wiring portion; 5, second monitoring component; 50, second insulating portion; 500, third encapsulation layer; 501, fourth encapsulation layer; 51, second sensing portion; 510, second electrode layer; 511, second sensing layer; 52, second wiring portion; X, first direction. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are only a part rather than all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.

[0034] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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 thus should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality" means two or more, and "at least one" means one, two or more, unless otherwise specifically defined.

[0035] Currently, for battery anomaly monitoring, usually harnesses, temperature-measuring thermocouples, etc. are used. According to the distribution density of points in each area, they are pasted on the outer surface of the battery to monitor the temperature of a single battery and achieve real-time monitoring of battery anomaly situations.

[0036] However, the temperature measurement and monitoring structure is pasted on the outer surface of the battery. Due to the lag of heat conduction, the temperature measurement and monitoring structure cannot monitor the temperature and pressure inside the battery. In addition, since most of the temperature measurement structures only layout several monitoring points by region, the situation of each battery cannot be monitored. At the same time, the temperature measurement and monitoring structure is pasted on the outer surface of the battery. When the battery vibrates or water vapor invades, there are risks such as detachment and failure.

[0037] In view of this, combined with Figures 1 to 6 , the embodiment of the present application provides a battery, aiming to overcome at least one of the above technical problems.

[0038] Referring to Figures 1 to 3 , a battery includes a housing 1, a top cover assembly 2, an electrode assembly 3, and a first monitoring assembly 4.

[0039] The housing 1 includes a connected bottom wall 10 and a peripheral wall 11. The peripheral wall 11 surrounds the bottom wall 10, and the bottom wall 10 and the peripheral wall 11 enclose a receiving cavity 12 with an opening 13. The electrode assembly 3 is disposed in the receiving cavity 12. The electrode assembly 3 includes a battery cell body 30 and an insulating layer 31 coated on the outside of the battery cell body 30. The top cover assembly 2 is covered on the opening 13. The first monitoring assembly 4 is disposed in the receiving cavity 12. The first monitoring assembly 4 is located between the bottom wall 10 and the electrode assembly 3, and the first monitoring assembly 4 is heat-melt connected to the insulating layer 31 and attached to the bottom wall 10. The first monitoring assembly 4 is used to monitor at least one of the temperature and pressure in the receiving cavity 12.

[0040] It can be understood that by arranging the first monitoring assembly 4 inside the receiving cavity 12, it is beneficial to timely monitor the changes in the internal temperature and / or pressure of the battery, improving the timeliness and accuracy of monitoring abnormal situations of the battery. At the same time, the first monitoring assembly 4 is arranged between the bottom wall 10 and the electrode assembly 3 and is heat-melt connected to the insulating layer 31, that is, the first monitoring assembly 4 forms a supporting effect on the electrode assembly 3, which is beneficial to keeping the first monitoring assembly 4 attached to the electrode assembly 3, and further beneficial to timely monitoring the abnormal situation of the electrode assembly 3. The outside of the battery cell body 30 is also coated with the insulating layer 31. When the first monitoring assembly 4 is attached to the electrode assembly 3, it can further improve the insulation effect between the battery cell body 30 and the first monitoring assembly 4, improving the protection of the battery cell body 30.

[0041] It should be noted that the first monitoring assembly 4 can adopt a temperature sensor with the function of monitoring temperature or a pressure sensor with the function of monitoring the pressure in the receiving cavity 12, or can also adopt a temperature and pressure sensor with the functions of monitoring temperature and pressure at the same time. In this embodiment, it is taken that the first monitoring assembly 4 can monitor the temperature and the pressure in the receiving cavity 12 at the same time as an example. In other embodiments, the function of the first monitoring assembly 4 can be flexibly adjusted according to needs. In addition, the monitoring principles of the temperature sensor and the pressure sensor are prior arts and will not be elaborated here.

[0042] Specifically, in some embodiments, with reference to FIG. 6, the first monitoring component 4 includes a first insulating portion 40, a first sensing portion 41 integrated within the first insulating portion 40, and a first wiring portion 42 connected to the first sensing portion 41. The first insulating portion 40 is heat-melted and connected to the insulating layer 31. The first wiring portion 42 protrudes from the first insulating portion 40. The first sensing portion 41 is configured to monitor at least one of the temperature and pressure within the accommodation cavity 12. The first wiring portion 42 is configured to connect to a signal receiving end outside the accommodation cavity 12 and output at least one of a temperature signal and a pressure signal. The first insulating portion 40 can be directly attached to the electrode assembly 3 and the bottom wall 10 and is heat-melted and connected to the insulating layer 31, improving the safety of the first sensing portion 41 being built into the accommodation cavity 12. In this embodiment, the first insulating portion 40 can be made of an insulating material such as polypropylene (PP). Taking polypropylene (PP) as an example, its melting point is higher than 150°C, and within the temperature and pressure range of normal battery operation, it can maintain good insulation and stability, improving the service stability of the first monitoring component 4.

[0043] In addition, it should be noted that taking polypropylene (PP) as an example, the first monitoring component 4 can have good mechanical strength and wear resistance, etc. The first monitoring component 4 can form an insulating support for the electrode assembly 3 at the bottom wall 10, which is conducive to replacing the conventional bottom support plate structure inside the battery, simplifying the battery structure, reducing the occupation of the internal space of the battery by structural components, optimizing the battery space, and indirectly helping to improve the battery energy density.

[0044] In addition, it should be noted that the first monitoring component 4 can also be separately attached to the outside of the insulating layer 31.

[0045] In some embodiments, with reference to Figure 1 、 Figure 3 and Figure 6 , the first insulating portion 40 includes a first encapsulation layer 400 and a second encapsulation layer 401 connected to each other. The first encapsulation layer 400 and the second encapsulation layer 401 cover the outside of the first sensing portion 41. The first encapsulation layer 400 is heat-melted and connected to the insulating layer 31. The second encapsulation layer 401 is connected to the bottom wall 10. The first sensing portion 41 includes a first electrode layer 410 and a first sensing layer 411 connected to each other, and the first wiring portion 42 is connected to the first electrode layer 410.

[0046] It can be understood that the first encapsulation layer 400 and the second encapsulation layer 401, as an insulating encapsulation structure, integrally and insulatingly encapsulate the first sensing part 41. The first sensing layer 411 has the above-mentioned temperature and pressure sensing functions, and the first sensing layer 411 can transmit the collected temperature and pressure data to the first electrode layer 410, which converts it into an electrical signal and outputs the electrical signal through the first wiring part 42. In this embodiment, the first monitoring component 4 can output the collected temperature and pressure signals to a signal receiving end outside the accommodation cavity 12 in a wired connection form. Correspondingly, a reserved through structure for the wiring of the first wiring part 42 to pass through the accommodation cavity 12 can be provided at the top cover component 2, and sealing can be applied to the reserved through structure.

[0047] In addition, in some embodiments, the first monitoring component 4 can also output the collected temperature and pressure signals to a signal receiving end outside the accommodation cavity 12 in a wireless connection form.

[0048] Specifically, the first monitoring component 4 does not need to be provided with the first wiring part 42 but is provided with a signal transmitting part. The signal transmitting part can be built into the accommodation cavity 12, directly connected to the first sensing part 41 and signal-connected to a signal receiving end outside the accommodation cavity 12 to wirelessly output temperature signals and pressure signals.

[0049] In some embodiments, the signal transmitting part can also be provided outside the accommodation cavity 12, connected to the housing 1 or the top cover component 2. The first sensing part 41 and the signal transmitting part are connected by wire, and the signal transmitting part is signal-connected to a signal receiving end outside the accommodation cavity 12 to wirelessly output temperature signals and pressure signals. The signal receiving and transmitting principle of the signal transmitting part is prior art and will not be elaborated here.

[0050] In some embodiments, referring to Figures 4 to 6 , the battery further includes a second monitoring component 5. The second monitoring component 5 is provided in the accommodation cavity 12, and the second monitoring component 5 is connected to the top cover component 2. The second monitoring component 5 is used to monitor at least one of the temperature and pressure in the accommodation cavity 12.

[0051] It should be noted that the second monitoring component 5 can adopt a temperature sensor with a temperature monitoring function or a pressure sensor with a function of monitoring the pressure in the accommodation cavity 12, or can also adopt a temperature and pressure sensor with both temperature and pressure monitoring functions. In this embodiment, the second monitoring component 5 can monitor both temperature and the pressure in the accommodation cavity 12 as an example. In other embodiments, the function of the second monitoring component 5 can be flexibly adjusted according to needs.

[0052] The surface of the second monitoring component 5 can also adopt an insulating material such as polypropylene (PP).

[0053] In some embodiments, referring to Figure 1 、 Figure 4 andFigure 5 , the top cover assembly 2 includes a cover body 20 and an insulating member 21 connecting the cover body 20. In addition, a pole column 22 penetrates through the cover body 20 and an explosion-proof valve 23 is provided. The insulating member 21 is located on the side of the cover body 20 facing the electrode assembly 3. The second monitoring assembly 5 is connected to the insulating member 21, and the second monitoring assembly 5 is located on the side of the insulating member 21 facing the electrode assembly 3.

[0054] Specifically, the cover body 20 and the housing 1 can be connected by welding or other means. Refer to Figure 4 , in this embodiment, the second monitoring assembly 5 is arranged at a clearance position between two pole columns 22. The second monitoring assembly 5 can be fixedly connected to the insulating member 21 by means such as gluing or hot melting.

[0055] In some embodiments, the battery further includes a pole column 22. The pole column 22 sequentially penetrates through the cover body 20 and the insulating member 21, and the pole column 22 is connected to the electrode assembly 3; the insulating member 21 is provided with a boss 210 extending towards the electrode assembly 3. The boss 210 abuts against the end face of the electrode assembly 3 facing the cover body 20, and the second monitoring assembly 5 is located between the pole column 22 and the boss 210.

[0056] Specifically, the boss 210 can be located in the middle part of the insulating member 21 and at the end near the length direction of the insulating member 21. The boss 210 can limit the up and down movement of the electrode assembly 3, avoid internal short circuit of the battery, and improve the safety performance of the battery. Arranging the second monitoring assembly 5 between the pole column 22 and the boss 210 can facilitate the installation of the second monitoring assembly 5 and protect the second monitoring assembly 5. In addition, the cover body 20 is provided with a liquid injection hole in a penetrating manner, and a plurality of protrusions are provided on the side of the insulating member 21 close to the electrode assembly 3. The plurality of protrusions are evenly distributed along the circumference of the liquid injection hole. The protrusions are provided to prevent the pole ear from deforming and directly covering the liquid injection hole.

[0057] In some embodiments, refer to Figures 4 to 6 , the second monitoring assembly 5 includes a second insulating part 50, a second sensing part 51 integrated in the second insulating part 50, and a second wiring part 52 connecting the second sensing part 51. In this embodiment, the second insulating part 50 can be hot melt connected to the insulating member 21. The second wiring part 52 protrudes from the second insulating part 50. The second sensing part 51 is used to monitor at least one of the temperature and pressure in the accommodation cavity 12, and the second wiring part 52 is used to connect to a signal receiving end outside the accommodation cavity 12 and output at least one of the temperature signal and the pressure signal.

[0058] Specifically, the second insulating part 50 includes a third encapsulation layer 500 and a fourth encapsulation layer 501 connected to each other. The third encapsulation layer 500 and the fourth encapsulation layer 501 cover the outside of the second sensing part 51, and the third encapsulation layer 500 is hot melt connected to the insulating member 21; the second sensing part 51 includes a second electrode layer 510 and a second sensing layer 511 connected to each other, and the second wiring part 52 is connected to the second electrode layer 510.

[0059] It can be understood that the third encapsulation layer 500 and the fourth encapsulation layer 501 insulate and wrap the overall second sensing part 51 as an insulating encapsulation structure. The second sensing layer 511 has the above-mentioned temperature and pressure sensing functions, and the second sensing layer 511 can transmit the collected temperature and pressure data to the second electrode layer 510, which is converted into an electrical signal by the second electrode layer 510 and output by the second wiring part 52. In this embodiment, the second monitoring component 5 can output the collected temperature and pressure signals to the signal receiving end outside the accommodation cavity 12 in a wired connection form. Correspondingly, a reserved through structure for the wiring of the second wiring part 52 to pass through the accommodation cavity 12 can be provided at the top cover assembly 2, and sealing can be applied to the reserved through structure.

[0060] In addition, in other embodiments, similar to the first monitoring component 4 that can output signals in a wireless connection form, the second monitoring component 5 can also output the collected temperature and pressure signals to the signal receiving end outside the accommodation cavity 12 in a wireless connection form, which will not be elaborated here.

[0061] In some embodiments, referring to Figure 2 and Figure 3 , the battery has a first direction X, which is actually parallel to the thickness direction of the top cover assembly 2. The top cover assembly 2, the electrode assembly 3, and the first monitoring component 4 are arranged along the first direction X, and the thickness of the first monitoring component 4 in the first direction X is a, satisfying a ≤ 2 mm.

[0062] Specifically, also referring to Figure 1 , in this embodiment, the first monitoring component 4 is arranged as a thin film type structure that is laid flat on the bottom wall 10 as a whole, which is beneficial to improving the insulation support effect on the electrode assembly 3 and reducing the space occupied inside the battery, and is beneficial to assisting in improving the battery energy density.

[0063] In some embodiments, referring to Figures 4 to 6 , the thickness of the second monitoring component 5 in the first direction X is b, satisfying b ≤ 2 mm.

[0064] Similarly, in this embodiment, the second monitoring component 5 is arranged as a thin film type structure that is laid flat on the side of the insulating member 21 facing the electrode assembly 3 as a whole, which is beneficial to reducing the space occupied inside the battery, thereby assisting in improving the battery energy density.

[0065] Correspondingly, the embodiment of the present application provides a battery pack, which includes the above-mentioned battery. This battery pack can be applied to devices such as electronic devices, energy storage devices, or electric vehicles, etc. It can be understood that this battery pack can have all the technical features and corresponding beneficial effects of the above-mentioned battery, which will not be elaborated here.

[0066] The above has introduced in detail a battery and a battery pack provided by the embodiments of the present application, and specific examples have been used to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; 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 application.

Claims

1. A battery, characterized in that: include: A housing (1), the housing (1) comprising a bottom wall (10) and a peripheral wall (11) connected to each other, the peripheral wall (11) surrounding the bottom wall (10), and the bottom wall (10) and the peripheral wall (11) enclose a receiving cavity (12) having an opening (13); A top cover assembly (2), the top cover assembly (2) being arranged to cover the opening (13); An electrode assembly (3), the electrode assembly (3) being arranged in the accommodating cavity (12), the electrode assembly (3) comprising a battery cell body (30) and an insulating layer (31) covering the outside of the battery cell body (30); A first monitoring component (4), the first monitoring component (4) is arranged in the accommodating cavity (12), the first monitoring component (4) is located between the bottom wall (10) and the electrode component (3), and the first monitoring component (4) is hot-melt connected to the insulating layer (31) and adheres to the bottom wall (10), and the first monitoring component (4) is used to monitor at least one of the temperature and the pressure in the accommodating cavity (12).

2. The battery according to claim 1, characterized in that The first monitoring component (4) comprises a first insulating part (40), a first sensing part (41) integrated in the first insulating part (40), and a first wiring part (42) connected to the first sensing part (41), the first insulating part (40) being connected to the insulating layer (31) by hot-melt connection, the first wiring part (42) protruding from the first insulating part (40), the first sensing part (41) being used to monitor at least one of the temperature and the pressure in the accommodating cavity (12), and the first wiring part (42) being used to connect to a signal receiving end outside the accommodating cavity (12) and output at least one of a temperature signal and a pressure signal.

3. The battery according to claim 2, characterized in that The first insulating portion (40) comprises a first packaging layer (400) and a second packaging layer (401) connected to each other, the first packaging layer (400) and the second packaging layer (401) are coated on the outside of the first sensing portion (41), the first packaging layer (400) is hot-melt-connected to the insulating layer (31), and the second packaging layer (401) is connected to the bottom wall (10); The first sensing portion (41) comprises a first electrode layer (410) and a first sensing layer (411) which are connected to each other, and the first wiring portion (42) is connected to the first electrode layer (410).

4. The battery according to claim 1, characterized in that The battery also includes: A second monitoring component (5), the second monitoring component (5) is arranged in the accommodating chamber (12), and the second monitoring component (5) is connected to the top cover component (2), and the second monitoring component (5) is used to monitor at least one of the temperature and pressure in the accommodating chamber (12).

5. The battery according to claim 4, characterized in that The top cover assembly (2) comprises a cover body (20) and an insulating member (21) connected to the cover body (20), and the insulating member (21) is located on a side of the cover body (20) facing the electrode assembly (3); the second monitoring assembly (5) is connected to the insulating member (21), and the second monitoring assembly (5) is located on a side of the insulating member (21) facing the electrode assembly (3).

6. The battery according to claim 5, characterized in that The battery further comprises an electrode post (22), wherein the electrode post (22) is sequentially passed through the cover body (20) and the insulating member (21), and the electrode post (22) is connected to the electrode assembly (3); The insulating member (21) is provided with a boss (210) extending toward the electrode assembly (3), the boss (210) abutting against the end surface of the electrode assembly (3) facing the cover body (20), and the second monitoring assembly (5) is located between the pole (22) and the boss (210).

7. The battery according to claim 6, characterized in that The second monitoring component (5) comprises a second insulating part (50), a second sensing part (51) integrated in the second insulating part (50), and a second wiring part (52) connected to the second sensing part (51), the second insulating part (50) being connected to the insulating member (21) by hot-melt connection, the second wiring part (52) protruding from the second insulating part (50), the second sensing part (51) being used to monitor at least one of the temperature and the pressure in the accommodating cavity (12), and the second wiring part (52) being used to connect to a signal receiving end outside the accommodating cavity (12) and output at least one of a temperature signal and a pressure signal.

8. The battery according to claim 7, characterized in that The second insulating part (50) comprises a third packaging layer (500) and a fourth packaging layer (501) connected to each other, the third packaging layer (500) and the fourth packaging layer (501) are coated on the outside of the second sensing part (51), and the third packaging layer (500) is thermally melt-connected to the insulating part (21); The second sensing portion (51) comprises a second electrode layer (510) and a second sensing layer (511) which are connected to each other, and the second wiring portion (52) is connected to the second electrode layer (510).

9. The battery according to claim 4, characterized in that The battery has a first direction (X), the top cover assembly (2), the electrode assembly (3) and the first monitoring assembly (4) are arranged along the first direction (X), and the thickness of the first monitoring assembly (4) in the first direction (X) is a, satisfying a≤2 mm; And / or, the thickness of the second monitoring component (5) in the first direction (X) is b, satisfying b≤2 mm.

10. A battery pack, characterized in that: Comprising the battery as claimed in any one of claims 1 to 9.

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