Battery and battery pack

Abstract

The utility model discloses a battery and a battery pack, the battery comprises a core package and a monitoring assembly, the monitoring assembly comprises a first protective film and a plurality of acquisition pieces, the first protective film is attached to the side surface of the core package, the plurality of acquisition pieces are fixed on one side, deviating from the core package, of the first protective film, and the plurality of acquisition pieces are configured to acquire parameter information in the battery. The collection part and the core package are separated through the first protective film, so that the collection part is prevented from puncturing the diaphragm of the core package while battery monitoring is met, the core package is protected, and the safety of the battery is improved.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and in particular relates to a battery and a battery pack. Background Art

[0002] Lithium batteries offer advantages such as compact size, high energy density, long lifespan, and environmental friendliness. They are widely used in industries such as automotive, electronics, and energy storage systems. However, during use, lithium batteries generate heat and gas due to charge and discharge cycles, which can lead to battery explosion and thermal runaway in severe cases.

[0003] In related technologies, battery management systems are designed to collect data from the battery using a data acquisition device installed within the battery. Based on the collected data, battery safety management is performed. However, this data acquisition device is typically installed on the core pack, which can easily damage the core pack's diaphragm, causing a short circuit and compromising battery safety. Utility Model Content

[0004] An embodiment of the present application provides a battery and a battery pack. The battery is provided with a first protective film on one side of the core pack, and multiple collection components are provided on the side of the first protective film facing away from the core pack to collect information inside the battery. The collection components are separated from the core pack by the first protective film, thereby achieving the technical effect of protecting the core pack and preventing damage to the core pack.

[0005] In a first aspect, an embodiment of the present application provides a battery, comprising:

[0006] core package;

[0007] The monitoring component includes a first protective film and a plurality of collecting pieces, wherein the first protective film is attached to the side of the core package, and the plurality of collecting pieces are fixed to the side of the first protective film away from the core package, and the plurality of collecting pieces are configured to collect parameter information within the battery.

[0008] Optionally, the multiple collection components include at least one of a temperature collection component, a stress collection component, and a gas composition collection component.

[0009] Optionally, the plurality of collecting members are arranged in an area near the middle of the first protective film.

[0010] Optionally, the multiple collection parts include a temperature collection part, a stress collection part and a gas composition collection part. Along the width direction of the first protective film, the temperature collection part and the stress collection part are arranged at intervals, and along the length direction of the first protective film, the temperature collection part or the stress collection part and the gas composition collection part are arranged at intervals.

[0011] Optionally, the monitoring component further includes a second protective film, which is in contact with a side of the first protective film facing away from the core package, and the multiple collection components are arranged between the first protective film and the second protective film.

[0012] Optionally, the multiple collection pieces include a gas component collection piece, the second protective film is provided with a hollow area, and the collection end of the gas component collection piece is located in the hollow area.

[0013] Optionally, the first protective film or the second protective film includes a polypropylene material film layer or a polyimide material film layer.

[0014] Optionally, the length of the first protective film is the same as the length of the second protective film;

[0015] And / or, the width of the first protective film is the same as the width of the second protective film;

[0016] And / or, the thickness of the first protective film is the same as the thickness of the second protective film.

[0017] Optionally, the length dimension of the first protective film and / or the length dimension of the second protective film is less than or equal to the length dimension of the core package, and the width dimension of the first protective film and / or the width dimension of the second protective film is less than or equal to the width dimension of the core package.

[0018] Optionally, the sum of the thicknesses of the first protective film and the second protective film is D, where 0.1 mm ≤ D ≤ 2.0 mm.

[0019] Optionally, the distance between the wide side of the first protective film or the second protective film and the wide side of the core package is W, and the distance between the long side of the first protective film or the second protective film and the long side of the core package is L, wherein 3.0mm≤W≤30.0mm, 3.0mm≤L≤30.0mm.

[0020] Optionally, L=W.

[0021] Optionally, the first protective film or the second protective film has a first end and a second end, the first end is close to the top of the core package, the second end is close to the bottom of the core package, and the distance between the first end and the top of the core package is smaller than the distance between the second end and the bottom of the core package.

[0022] Optionally, also include:

[0023] a cover plate assembly connected to the core package;

[0024] The monitoring assembly also includes a signal acquisition device, which is arranged on the side of the cover assembly facing the core package. The signal acquisition device is connected to the cover assembly. The signal acquisition device is connected to the multiple acquisition parts through connecting lines, and at least part of the connecting lines are arranged between the first protective film and the second protective film.

[0025] Optionally, the signal acquisition device includes:

[0026] The main body is provided with a receiving space;

[0027] A data processor is disposed in the receiving space, and the data processor is connected to the plurality of acquisition components via the connecting lines.

[0028] Optionally, the signal acquisition device further includes:

[0029] a power supply, disposed in the receiving space, the power supply being electrically connected to the data processor;

[0030] And / or, the receiving space is filled with sealant.

[0031] Optionally, the monitoring component further includes a wireless transmission module, which is connected to the signal acquisition device and is configured to be wirelessly connected to an external battery control system.

[0032] Optionally, the monitoring assembly further includes a switching device installed on the cover assembly, the switching device is located between the wireless transmission module and the signal acquisition device, and the switching device connects the wireless transmission module and the signal acquisition device.

[0033] Optionally, the signal acquisition device further includes an air pressure sensor, which is disposed in the receiving space, connected to the data processor, and configured to detect the air pressure value in the battery.

[0034] Optionally, a vent hole and a breathable membrane are provided on the main body, the vent hole is located on a side of the main body close to the explosion-proof valve of the battery, the breathable membrane blocks the vent hole, and the air pressure sensor is arranged opposite to the vent hole.

[0035] Optionally, a snap fastener is provided on the main body, and a snap fitting is provided on the cover assembly, and the snap fastener is snap-fitted with the snap fitting;

[0036] Alternatively, the body is a plastic body, and the plastic body and the cover assembly are fixedly connected at the fitting position by hot melting.

[0037] Optionally, the cover plate assembly includes:

[0038] cover;

[0039] a pole, mounted on the cover plate;

[0040] A connecting piece is provided on the side of the cover plate facing the core package, the connecting piece connects the pole and the pole ear of the core package, and a notch is provided on the side of the connecting piece close to the signal acquisition device, and the signal acquisition device is partially located in the notch.

[0041] Optionally, the notch is in a flared shape, and the opening size of the notch at one end close to the signal acquisition device is larger than the opening size of the other end.

[0042] Optionally, the inclination angle of the side wall of the notch on the connecting plate is a, where 3°≤a≤30°.

[0043] In a second aspect, an embodiment of the present application further provides a battery pack comprising any of the batteries described above.

[0044] A battery and a battery pack provided in an embodiment of the present application include a core pack and a monitoring component. The monitoring component includes a first protective film and a plurality of collecting pieces. The first protective film is attached to one side of the core pack. The collecting pieces are arranged on the side of the first protective film facing away from the core pack. The collecting pieces are used to collect parameter information in the battery. The collecting pieces are separated from the core pack by the first protective film. While meeting the battery monitoring requirements, the collecting pieces are prevented from piercing the diaphragm of the core pack, thereby protecting the core pack and improving the safety of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0046] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0047] Figure 1 A three-dimensional diagram of a battery provided in an embodiment of the present application.

[0048] Figure 2 A partially cutaway perspective view of a battery according to an embodiment of the present application.

[0049] Figure 3 for Figure 2 Floor plan.

[0050] Figure 4A partial cross-sectional plan view of a battery provided in an embodiment of the present application.

[0051] Figure 5 A three-dimensional diagram of a battery signal acquisition device provided in an embodiment of the present application.

[0052] Figure 6 A partial cross-sectional view of a battery signal acquisition device provided in an embodiment of the present application.

[0053] Figure 7 A partial schematic diagram of a battery signal acquisition device provided in an embodiment of the present application.

[0054] Figure 8 A top view of the cover assembly of the battery provided in an embodiment of the present application.

[0055] Figure 9 An exploded view of the cover assembly of the battery provided in an embodiment of the present application.

[0056] Figure 10 This is an exploded view of the adapter provided in an embodiment of the present application.

[0057] Figure 11 for Figure 2 A partial enlarged view of point A in the middle. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0059] See also Figure 1 、 Figure 2 and Figure 3 The battery 10 provided in the embodiment of the present application is a single cell, such as a square cell, and is a secondary battery that can be reused. The battery includes a core pack 100, a monitoring assembly 200, a cover assembly 300, and a housing 400.

[0060] In some embodiments, see Figure 2 The housing 400 is a recessed structure with one end open. The cover assembly 300 covers the opening of the housing 400 to form a sealed space. The core package 100 is installed in the housing 400. Two core packages 100 can be installed in the housing 400, and the two core packages 100 are arranged side by side.

[0061] In some embodiments, see Figure 2The monitoring assembly 200 includes a first protective film 210 and multiple collection elements 230. The first protective film 210 is disposed on one side of the core package 100, with one side of the first protective film 210 in contact with one side of the core package 100. The multiple collection elements 230 are fixed to the side of the first protective film 210 facing away from the core package 100. The multiple collection elements 230 are configured to collect parameter information within the battery. The parameter information may include at least one of temperature information, stress information, and gas composition information.

[0062] In the examples of this application, see Figure 2 and Figure 3 The core package 100 and the collecting member 230 are separated by the first protective film 210. This reduces the probability of the collecting member 230 piercing the diaphragm of the core package 100, protects the core package 100, and improves the reliability of the core package 100.

[0063] In some embodiments, see Figure 3 and Figure 4 The monitoring assembly 200 further includes a second protective film 220. The first protective film 210 and the second protective film 220 can be disposed between the two core packages 100. The first protective film 210 is bonded to the side of one core package 100, and the second protective film 220 is bonded to the side of the other core package 100. The second protective film 220 is bonded to the first protective film 210. The first and second protective films 210, 220 are bonded together by adhesive. A plurality of collection pieces 230 are disposed between the first and second protective films 210, 220. The collection pieces 230 are secured by the first and second protective films 210, 220.

[0064] In the embodiment of the present application, the collection member 230 is fixed between the first protective film 210 and the second protective film 220, making installation and fixation of the collection member 230 simple. The collection member 230 can be assembled with the first and second protective films 210, 220 and then installed in the battery, making installation simple. The collection member 230 is separated from the core pack 100 on either side by the first protective film 210 or the second protective film 220, reducing the probability of the collection member 230 piercing the core pack 100 membrane, protecting the core pack 100 and improving its reliability.

[0065] In some embodiments, see Figure 3 The multiple acquisition components 230 include at least one of a temperature acquisition component 231, a stress acquisition component 232, and a gas composition acquisition component 233. The temperature acquisition component 231 is used to acquire temperature parameters within the battery. The stress acquisition component 232 is used to acquire stress parameters within the battery. The gas composition acquisition component 233 is used to acquire gas composition parameters within the battery. The type and number of acquisition components 230 can be set as needed and are not specifically limited in this embodiment. The number of temperature acquisition components 231, stress acquisition components 232, and gas composition acquisition components 233 can be one or more.

[0066] In the embodiment of the present application, the acquisition component 230 includes at least one of a temperature acquisition component 231, a stress acquisition component 232, and a gas composition acquisition component 233. The diverse types of acquisition components 230 allow for comprehensive data monitoring within the battery, thereby improving battery safety.

[0067] In some embodiments, multiple collection elements 230 are disposed near the center of the first protective film 210. For example, the temperature collection element 231, the stress collection element 232, and the gas composition collection element 233 are each disposed near the center of the first protective film 210. In other embodiments, multiple collection elements 230 may also be disposed near the edges of the core package 100 as needed.

[0068] In the embodiment of the present application, the collecting element 230 is set in the middle area of ​​the first protective film 210, that is, multiple collecting elements 230 collect parameter information near the middle area of ​​the battery, and the data collection results are accurate.

[0069] In some embodiments, the multiple collection components 230 include a temperature collection component 231, a stress collection component 232, and a gas composition collection component 233. Along the width direction of the first protective film 210, the temperature collection component 231 and the stress collection component 232 are arranged at intervals. Along the length direction of the first protective film 210, the temperature collection component 231 or the stress collection component 232 is arranged at intervals from the gas composition collection component 233.

[0070] In the embodiment of the present application, the temperature collection component 231, the stress collection component 232 and the gas composition collection component 233 are arranged at intervals. The temperature collection component 231 and the stress collection component 232 are located on the same side, and the gas composition collection component 233 is located on the other side. The arrangement of multiple collection components 230 is reasonable and convenient for the routing of each collection component 230.

[0071] In some embodiments, see Figure 3 and Figure 4 The plurality of gas collection elements 230 includes a gas composition collection element 233. The second protective film 220 has a hollowed-out area 221. The second protective film 220 within the hollowed-out area 221 is removed, and the collection end of the gas composition collection element 233 is located within the hollowed-out area 221. The collection end of the gas composition collection element 233 is exposed to the air, allowing for full contact with the gas within the battery, thereby collecting the gas composition within the battery and ensuring accurate collection results.

[0072] In some embodiments, the first protective film 210 or the second protective film 220 includes a polypropylene (PP) film layer or a polyimide (PI) film layer. The first protective film 210 and the second protective film 220 may be made of the same material, such as a PP film layer or a PI film layer. Alternatively, the first protective film 210 and the second protective film 220 may be made of different materials, such as a PP film layer and a PI film layer.

[0073] In the embodiment of the present application, the first protective film 210 and the second protective film 220 are PP film layers or PI film layers, which have the characteristics of good insulation and corrosion resistance.

[0074] In some embodiments, the length dimension of the first protection film 210 and the length dimension of the second protection film 220 are the same.

[0075] In some embodiments, the width dimension of the first protection film 210 and the width dimension of the second protection film 220 are the same.

[0076] In some embodiments, the thickness of the first protection film 210 is the same as the thickness of the second protection film 220 .

[0077] In the embodiment of the present application, the first protective film 210 and the second protective film 220 are of the same size, and the projection of the second protective film 220 on the plane of the first protective film 210 overlaps with the first protective film 210. The first protective film 210 and the second protective film 220 are easy to cut and process, and the alignment of the first protective film 210 and the second protective film 220 facilitates a simple gluing operation.

[0078] In some embodiments, see Figure 3 , the length dimension of the first protective film 210 or the length dimension of the second protective film 220 is less than or equal to the length dimension of the core package 100 .

[0079] In some embodiments, the width dimension of the first protection film 210 or the width dimension of the second protection film 220 is less than or equal to the width dimension of the core package 100 .

[0080] In the embodiment of the present application, the size of the first protective film 210 or the size of the second protective film 220 is less than or equal to the size of the side of the core package 100 to prevent the first protective film 210 or the second protective film 220 from extending to an area outside the core package 100.

[0081] In some embodiments, the sum of the thicknesses of the first protective film 210 and the second protective film 220 is D, where 0.1 mm ≤ D ≤ 2.0 mm. The value of D can be 0.1 mm, 0.3 mm, 0.6 mm, 0.7 mm, 1.0 mm, 1.2 mm, 1.5 mm, 1.7 mm, 1.9 mm, 2.0 mm, or other values ​​specified.

[0082] In the embodiment of the present application, the sum of the thicknesses of the first protective film 210 and the second protective film 220 is relatively small, occupying relatively little space inside the battery. The addition of the first protective film 210 and the second protective film 220 does not increase the battery specifications.

[0083] In some embodiments, see Figure 3 The distance between the wide side of the first protective film 210 or the second protective film 220 and the wide side of the core package 100 is W. The distance between the long side of the first protective film 210 or the second protective film 220 and the long side of the core package 100 is L. Among them, 3.0mm≤W≤30.0mm, 3.0mm≤L≤30.0mm. The value of W or L is 3.1mm, 4.3mm, 5.6mm, 6.7mm, 7.0mm, 8.2mm, 9.5mm, 10.7mm, 11.9mm, 12.0mm, 14.0mm, 15.0mm, 16.5mm, 17.8mm, 19.0mm, 20.0mm, 21.2mm, 23.0mm, 24.5mm, 26.0mm, 28.0mm, 29.0mm, 30.0mm or other listed values. The values ​​of W and L can be the same or different.

[0084] In this embodiment of the present application, the distance between the edge of the first protective film 210 or the second protective film 220 and the edge of the core package 100 is small, and the area of ​​the first protective film 210 and the second protective film 220 is large. This allows for a wide range of installation areas for the collection member 230, facilitating installation and ensuring the accuracy of the monitoring results.

[0085] In some embodiments, the first protective film 210 and / or the second protective film 220 has a first end and a second end. The first end is close to the top of the core package 100, and the second end is close to the bottom of the core package 100. The distance between the first end and the top of the core package 100 is smaller than the distance between the second end and the bottom of the core package 100.

[0086] In the embodiment of the present application, the signal acquisition device 240 is located at the top of the core package 100, and the acquisition member 230 is connected to the signal acquisition device 240 via a connecting wire 250. By setting the distance between the first end and the top of the core package 100 to be smaller than the distance between the second end and the bottom of the core package 100, the overlapping area of ​​the connecting wire 250 and the first protective film 210 and / or the second protective film 220 is sufficiently large, thereby reducing the probability of the core package 100 being damaged by the connecting wire 250 and improving the reliability of the battery.

[0087] In some embodiments, see Figure 1 、 Figure 2 and Figure 8The cover plate assembly 300 is located on top of the core package 100 and is connected to the core package 100. The monitoring assembly 200 further includes a signal acquisition device 240, which is disposed on a side of the cover plate assembly 300 facing the core package 100 and is connected to the cover plate assembly 300. The signal acquisition device 240 is connected to the plurality of acquisition components 230 via connecting wires 250, at least a portion of which is disposed between the first protective film 210 and the second protective film 220.

[0088] In this embodiment, the signal acquisition device 240 is integrally assembled with the cover assembly 300 and can be installed and removed integrally with the cover assembly 300, simplifying operation. The signal acquisition device 240 is isolated from the electrolyte within the battery, protecting it and improving its reliability. The signal acquisition device 240 is connected to the acquisition element 230 via a connecting cable 250, which is partially fixed between the first protective film 210 and the second protective film 220, simplifying wiring.

[0089] In some embodiments, see Figure 5 、 Figure 6 and Figure 7 Signal acquisition device 240 includes a body 241 and a data processor 242. Body 241 is a cubic structure with a receiving space 247 defined therein. Receiving space 247 can be a cubic structure or a T-shaped space. Data processor 242 is disposed within receiving space 247 and is connected to multiple acquisition components 230 via connecting cables 250. Data processor 242 is configured to convert signals collected by acquisition components 230 into electrical signals.

[0090] In some embodiments, the signal acquisition device 240 further includes a power supply 243, which is electrically connected to the data processor 242. The power supply 243 may be a primary lithium battery. The power supply 243 is disposed within the receiving space 247 and is electrically connected to the data processor 242, thereby supplying power to the data processor 242.

[0091] In the examples of this application, see Figure 5 、 Figure 6 and Figure 7 The signal acquisition device 240 includes a body 241, a data processor 242, and a power supply 243. The data processor 242 and the power supply 243 are integrated into the body 241. The signal acquisition device 240 has a simple structure and good integration, and is easy to assemble with the cover assembly 300.

[0092] In other embodiments, the data processor 242 is electrically connected to the positive and negative electrodes of the battery. The battery provides power to the data processor 242, eliminating the need for an additional power source, reducing equipment investment, and lowering costs.

[0093] In some embodiments, the receiving space 247 is filled with sealant. The body 241 is provided with a sealant injection hole, through which the sealant is injected into the receiving space 247. The volume of the sealant accounts for 70% to 99% of the volume of the receiving space 247.

[0094] In the embodiment of the present application, by filling the receiving space 247 with sealant, the electronic components in the receiving space 247 are immersed in the sealant, thereby reducing the probability of electrolyte erosion of the electronic components and improving the sealing of the signal acquisition device 240.

[0095] In some embodiments, see Figure 5 and Figure 6 The signal acquisition device 240 further includes an air pressure sensor 244 . The air pressure sensor 244 is disposed in the receiving space 247 . The air pressure sensor 244 is connected to the data processor 242 . The air pressure sensor 244 is configured to detect the air pressure value in the battery.

[0096] In the embodiment of the present application, an air pressure sensor 244 is added to the signal acquisition device 240. The air pressure sensor 244 monitors the air pressure in the battery in real time and provides comprehensive monitoring.

[0097] In some embodiments, the body 241 is provided with a vent 246 and a breathable membrane 245. The sidewall of the body 241, adjacent to the battery explosion-proof valve, is provided with a vent 246. The vent 246 can be circular or square in shape. The breathable membrane 245 is connected to the body 241 and blocks the vent 246. The breathable membrane 245 is breathable and isolates the electrolyte. An air pressure sensor 244 is disposed within the receiving space 247, opposite the vent 246. The air pressure sensor 244 is configured to detect the air pressure within the battery.

[0098] In the embodiment of the present application, the breathable membrane 245 can isolate the electrolyte to prevent the electrolyte from entering the signal acquisition device 240. At the same time, gas can enter the air pressure sensor 244 through the breathable membrane 245 to ensure the monitoring effect of the air pressure sensor 244.

[0099] In some embodiments, a snap-fit ​​member is provided on the body 241, and a snap-fit ​​member is provided on the cover assembly 300, and the snap-fit ​​member and the snap-fit ​​member are snap-fitted together. The snap-fit ​​member may be a snap-fit ​​slot, and the snap-fit ​​member may be a snap-fit. The snap-fit ​​slot and the snap-fit ​​slot cooperate to achieve a detachable connection between the cover assembly 300 and the signal acquisition device 240, facilitating easy installation and removal of the signal acquisition device 240.

[0100] In other embodiments, the body 241 is a plastic body, and the plastic body and the cover assembly 300 are fixedly connected by hot-melt at the joint position. Alternatively, the body 241 can be fixed to the cover assembly 300 by welding or gluing.

[0101] In some embodiments, see Figure 11 The monitoring assembly 200 further includes a wireless transmitter module 270, which is connected to the signal acquisition device 240. A power supply 243 is electrically connected to the wireless transmitter module 270, and the power supply 243 supplies power to the wireless transmitter module 270. The wireless transmitter module 270 is configured to wirelessly connect to an external battery control system.

[0102] In this embodiment of the present application, signal acquisition device 240 converts the collected signals into electrical signals, which are then transmitted via wireless transmission module 270. Wireless transmission reduces wiring and simplifies installation and operation. Power supply 243 also powers wireless transmission module 270, eliminating the need for a separate power supply module, resulting in high integration and space savings.

[0103] In other embodiments, the signal acquisition device 240 is connected to the external battery control system via wired transmission, which has good stability.

[0104] In some embodiments, see Figure 11 The monitoring component 200 also includes a switching device 260 installed on the cover assembly 300. The switching device 260 is located between the wireless transmission module 270 and the signal acquisition device 240. The switching device 260 connects the wireless transmission module 270 and the signal acquisition device 240.

[0105] In this embodiment, see Figure 8 、 Figure 9 and Figure 10 The adapter device 260 includes a pressure block 261, a gasket 262, a metal needle 263 and a sealing ring 264. The pressure block 261, the gasket 262 and the sealing ring 264 are provided with a through hole for the metal needle 263 to pass through, and the through hole is arranged in alignment with the metal needle 263. The gasket 262 is located between the pressure block 261 and the sealing ring 264, and the sealing ring 264 blocks the side of the pressure block 261 facing the cover assembly 300. The cover assembly 300 is provided with a recessed area adapted to the pressure block 261, and the pressure block 261 is fixedly connected to the cover assembly 300. One end of the metal needle 263 is located in the through hole of the pressure block 261 and is connected to the wireless transmitting module 270. The other end extends out of the sealing ring 264, passes through the cover assembly 300 and is connected to the signal acquisition device 240.

[0106] In the examples of this application, see Figure 11 The signal acquisition device 240 is connected to the wireless transmission module 270 through the adapter 260, which is easy to install and disassemble and convenient for users to operate.

[0107] In some embodiments, see Figure 8 and Figure 9The cover plate assembly 300 includes a cover plate 310 , a pole 320 and a connecting piece 330 .

[0108] In this embodiment, the cover plate 310 is a rectangular plate structure, and the material of the cover plate 310 can be a plastic material. The cover plate 310 is provided with a through hole for the pole 320 to pass through. The cover plate 310 is also equipped with an explosion-proof valve structure.

[0109] In this embodiment, the poles 320 include a positive pole and a negative pole, and the positive pole and the negative pole are mounted on the cover plate 310 .

[0110] In this embodiment, a connecting piece 330 is disposed on the side of the cover plate 310 facing the core package 100. The connecting piece 330 connects the pole 320 to the tab of the core package 100. A notch 340 is provided on the side of the connecting piece 330 near the signal acquisition device 240, and the signal acquisition device 240 is partially located within the notch 340.

[0111] In the embodiment of the present application, in order to reasonably utilize the limited space of the cover assembly 300, a notch 340 is provided in the connecting piece 330 to avoid interference between the connecting piece 330 and the signal acquisition device 240, resulting in a compact structure and a reasonable spatial layout.

[0112] In some embodiments, the notch 340 is flared, and the opening size of the notch 340 at one end close to the signal collection device 240 is larger than the opening size at the other end.

[0113] In some embodiments, the sidewall of the notch 340 on the connecting piece 330 has an inclination angle a, where 3°≤a≤30°. The connecting piece 330 is in a horizontal "H" shape. The value of a can be 3°, 5°, 8°, 10°, 15°, 18°, 22°, 27°, or 30°.

[0114] In the embodiment of the present application, the notch 340 is flared, and the inclination angle of the side wall of the notch 340 on the connecting piece 330 ensures the structural strength of the connecting piece 330 while meeting the installation space of the signal acquisition device 240.

[0115] An embodiment of the present application also provides a battery pack, comprising a battery according to any one of the above embodiments.

[0116] In the embodiments of the present application, the battery pack includes multiple single cells, some of which use the batteries of the above-mentioned embodiments, or all of which use the batteries of the above-mentioned embodiments. When some of the batteries use the batteries of the above-mentioned embodiments, the batteries can be arranged in areas such as near the sides or in the middle of the battery pack. They can be arranged in a regular pattern, such as a matrix layout. While ensuring the safety of the battery pack, equipment investment can be reduced and costs can be lowered.

[0117] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0118] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more features.

[0119] The above is a detailed introduction to the batteries and battery packs provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present application.

Claims

1. A battery, characterized in that: include: Core package (100); A monitoring component (200) comprises a first protective film (210) and a plurality of collecting pieces (230), wherein the first protective film (210) is attached to a side of the core package (100), and the plurality of collecting pieces (230) are fixed to a side of the first protective film (210) facing away from the core package (100), and the plurality of collecting pieces (230) are configured to collect parameter information within the battery; The monitoring component (200) further comprises a second protective film (220), the second protective film (220) being in contact with a side of the first protective film (210) facing away from the core package (100), and the plurality of collecting pieces (230) being arranged between the first protective film (210) and the second protective film (220); The first protective film (210) and / or the second protective film (220) has a first end and a second end, the first end is close to the top of the core package (100), the second end is close to the bottom of the core package (100), and the distance between the first end and the top of the core package (100) is smaller than the distance between the second end and the bottom of the core package (100).

2. The battery according to claim 1, characterized in that The plurality of collection pieces (230) include at least one of a temperature collection piece (231), a stress collection piece (232), and a gas composition collection piece (233).

3. The battery according to claim 1, characterized in that The plurality of collecting parts (230) are arranged in an area near the middle of the first protective film (210).

4. The battery according to claim 3, characterized in that The multiple collection pieces (230) include a temperature collection piece (231), a stress collection piece (232), and a gas composition collection piece (233); along the width direction of the first protective film (210), the temperature collection piece (231) and the stress collection piece (232) are arranged at intervals; along the length direction of the first protective film (210), the temperature collection piece (231) or the stress collection piece (232) and the gas composition collection piece (233) are arranged at intervals.

5. The battery according to claim 1, characterized in that The multiple collection pieces (230) include a gas component collection piece (233); the second protective film (220) is provided with a hollow area (221); and a collection end of the gas component collection piece (233) is located in the hollow area (221).

6. The battery according to claim 1, characterized in that The first protective film (210) or the second protective film (220) comprises a polypropylene material film layer or a polyimide material film layer.

7. The battery according to claim 1, characterized in that The length dimension of the first protective film (210) is the same as the length dimension of the second protective film (220); and / or the width dimension of the first protective film (210) is the same as the width dimension of the second protective film (220); And / or, the thickness of the first protective film (210) is the same as the thickness of the second protective film (220).

8. The battery according to claim 1, characterized in that The length dimension of the first protective film (210) and / or the length dimension of the second protective film (220) is less than or equal to the length dimension of the core package (100), and the width dimension of the first protective film (210) and / or the width dimension of the second protective film (220) is less than or equal to the width dimension of the core package (100).

9. The battery according to any one of claims 1 to 8, characterized in that The sum of the thicknesses of the first protective film (210) and the second protective film (220) is D, wherein 0.1 mm ≤ D ≤ 2.0 mm.

10. The battery according to any one of claims 1 to 8, characterized in that The distance between the wide side of the first protective film (210) or the second protective film (220) and the wide side of the core package (100) is W, and the distance between the long side of the first protective film (210) or the second protective film (220) and the long side of the core package (100) is L, wherein 3.0 mm ≤ W ≤ 30.0 mm, and 3.0 mm ≤ L ≤ 30.0 mm.

11. The battery according to claim 10, characterized in that L=W.

12. The battery according to any one of claims 1 to 8, characterized in that Also includes: a cover plate assembly (300), the cover plate assembly (300) being connected to the core package (100); The monitoring assembly (200) further comprises a signal acquisition device (240), the signal acquisition device (240) being arranged on a side of the cover assembly (300) facing the core package (100), the signal acquisition device (240) being connected to the cover assembly (300), the signal acquisition device (240) being connected to the plurality of acquisition components (230) via a connecting line (250), and at least a portion of the connecting line (250) being arranged between the first protective film (210) and the second protective film (220).

13. The battery according to claim 12, characterized in that The signal acquisition device (240) comprises: The main body (241) is provided with a receiving space (247); A data processor (242) is disposed in the receiving space (247), and the data processor (242) is connected to the plurality of collecting components (230) via the connecting line (250).

14. The battery according to claim 13, characterized in that The signal acquisition device (240) further includes: A power supply (243) is disposed in the receiving space (247), and the power supply (243) is electrically connected to the data processor (242); And / or, the receiving space (247) is filled with sealant.

15. The battery according to claim 13, characterized in that The main body (241) is provided with a snap-fitting piece, and the cover assembly (300) is provided with a snap-fitting piece, and the snap-fitting piece is snap-connected with the snap-fitting piece; Alternatively, the body (241) is a plastic body, and the plastic body and the cover assembly (300) are fixedly connected by hot melting at the fitting position.

16. The battery according to claim 13, characterized in that The signal acquisition device (240) further includes an air pressure sensor (244), which is disposed in the receiving space (247), connected to the data processor (242), and configured to detect the air pressure value in the battery.

17. The battery according to claim 16, characterized in that The body (241) is provided with a vent hole (246) and a breathable membrane (245); the vent hole (246) is located on a side of the body (241) close to the explosion-proof valve of the battery; the breathable membrane (245) blocks the vent hole (246); and the air pressure sensor (244) is arranged opposite to the vent hole (246).

18. The battery according to claim 12, characterized in that The monitoring component (200) further comprises a wireless transmission module (270), the wireless transmission module (270) being connected to the signal acquisition device (240), and the wireless transmission module (270) being configured to be wirelessly connected to an external battery control system.

19. The battery according to claim 18, characterized in that The monitoring assembly (200) further comprises a switching device (260) mounted on the cover assembly (300); the switching device (260) is located between the wireless transmission module (270) and the signal acquisition device (240); the switching device (260) connects the wireless transmission module (270) and the signal acquisition device (240).

20. The battery according to claim 12, characterized in that The cover plate assembly (300) comprises: Cover plate (310); A pole (320) is mounted on the cover plate (310); A connecting piece (330) is provided on a side of the cover plate (310) facing the core package (100), the connecting piece (330) connecting the pole (320) and the pole ear of the core package (100), a notch (340) is provided on a side of the connecting piece (330) close to the signal acquisition device (240), and the signal acquisition device (240) is partially located in the notch (340).

21. The battery according to claim 20, characterized in that The notch (340) is in a flared shape, and the opening size of one end of the notch (340) close to the signal collection device (240) is larger than the opening size of the other end.

22. The battery according to claim 21, characterized in that The inclination angle of the side wall of the notch (340) on the connecting piece (330) is a, wherein 3°≤a≤30°.

23. A battery pack, characterized in that: include: A battery according to any one of claims 1 to 22.

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