Battery, battery pack and electric equipment

Abstract

The invention relates to a battery, a battery pack and electric equipment, the battery comprises a shell, a battery cell and a monitoring module, the shell is internally provided with a cavity, the battery cell comprises a plurality of positive plates and a plurality of negative plates, and the positive plates and the negative plates are alternately stacked in the thickness direction of the positive plates and the negative plates and are arranged in the cavity; the monitoring module is arranged in the cavity and used for monitoring the state of the battery cell, the positive electrode end of the monitoring module is electrically connected with the positive electrode lug of the positive plate, and the negative electrode end of the monitoring module is electrically connected with the negative electrode lug of the negative plate. The monitoring module is arranged in the shell of the battery, so that the state of the battery cell can be monitored in real time, the safety and the stability of the battery cell are improved, and the service life of the battery cell is prolonged; and the positive plate and the negative plate can provide electric energy for the operation of the monitoring module, so that the overall structure of the monitoring module can be simplified, the occupied space of the monitoring module is reduced, and the monitoring module can be mounted and arranged in the shell more conveniently.

Description

Technical Field

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

[0002] Power batteries, especially lithium-ion batteries, have been widely used in electric vehicles, energy storage systems and other fields due to their advantages such as high energy density and long cycle life. However, while pursuing high energy density and improving battery life, the working conditions inside the battery have become more stringent, especially the control of parameters such as temperature and pressure, which has become a key factor in ensuring battery performance and safety. In related technologies, the battery status is currently generally evaluated by monitoring the battery voltage and temperature parameters outside the battery, but the voltage and temperature parameters alone cannot accurately reflect the internal status of the battery, that is, it is impossible to accurately evaluate the battery life and safety status. Summary of the invention

[0003] The purpose of the present disclosure is to provide a battery, a battery pack and an electrical device to solve the technical problems existing in the related art.

[0004] In order to achieve the above object, the first aspect of the present disclosure provides a battery, comprising: A housing, wherein the housing has a cavity inside; A battery cell, the battery cell comprising a plurality of positive electrode sheets and a plurality of negative electrode sheets, wherein the plurality of positive electrode sheets and the plurality of negative electrode sheets are alternately stacked along their own thickness direction and arranged in the cavity; A monitoring module is arranged in the cavity and is used to monitor the state of the battery cell, and the positive terminal of the monitoring module is electrically connected to the positive electrode tab of the positive electrode sheet, and the negative terminal of the monitoring module is electrically connected to the negative electrode tab of the negative electrode sheet.

[0005] Optionally, the positive electrode tab of the positive electrode sheet is electrically connected to the shell.

[0006] Optionally, the positive terminal of the monitoring module is connected to the shell.

[0007] Optionally, the battery cell also includes a positive electrode column and a negative electrode column, the positive electrode tabs of the multiple positive electrode sheets are electrically connected to the positive electrode columns, the negative electrode tabs of the multiple negative electrode sheets are electrically connected to the negative electrode columns, the positive end of the monitoring module is electrically connected to the positive electrode column, and the negative end of the monitoring module is welded to the negative electrode column.

[0008] Optionally, the large surface area of ​​the monitoring module is the same as the large surface area of ​​the positive electrode sheet or the large surface area of ​​the negative electrode sheet.

[0009] Optionally, the positive terminal of the monitoring module is formed as a conductive connecting piece or a wire; The negative terminal of the monitoring module is formed as a conductive connecting piece or a wire.

[0010] Optionally, the monitoring module includes a monitoring module body and an insulating film layer, and the insulating film layer is wrapped around the outer circumference of the monitoring module body.

[0011] Optionally, the monitoring module is disposed between two adjacent negative electrode sheets, or the monitoring module is disposed between two adjacent positive electrode sheets.

[0012] Optionally, the battery cell includes a first battery cell portion and a second battery cell portion, the first battery cell portion and the second battery cell portion are respectively arranged on both sides of the monitoring module, and the first battery cell portion and the second battery cell portion are symmetrically arranged with respect to the monitoring module.

[0013] Optionally, the monitoring module is disposed between an inner wall of the shell and the battery cell to prevent a side of the battery cell close to the shell from contacting the inner wall of the shell.

[0014] Optionally, the monitoring module includes a signal acquisition unit, a signal processing unit and a signal transmission unit, the signal processing unit is signal-connected to the signal acquisition unit and the signal transmission unit respectively, and the signal transmission unit is used to send the signal collected by the signal acquisition unit to the battery management system.

[0015] Optionally, the signal acquisition unit is one or more of a pressure signal acquisition unit, a temperature signal acquisition unit and a gas signal acquisition unit.

[0016] A second aspect of the present disclosure provides a battery pack, comprising a battery pack housing and a plurality of batteries as described above, wherein the plurality of batteries are electrically connected and disposed in the battery pack housing.

[0017] A third aspect of the present disclosure provides an electrical device, comprising the battery as described above or the battery pack as described above.

[0018] Through the above technical scheme, the above monitoring module is arranged in the battery shell, which can realize real-time monitoring of the battery cell status, thereby improving the safety, stability and service life of the battery cell; and, the positive terminal of the monitoring module in the present disclosure is electrically connected to the positive pole ear of the positive electrode sheet, and the negative terminal of the monitoring module is electrically connected to the negative pole ear of the negative electrode sheet, that is, the positive electrode sheet and the negative electrode sheet can provide electrical energy for the operation of the monitoring module, so it can also simplify the overall structure of the monitoring module, reduce the occupied space of the monitoring module, and make it easier to install and arrange the monitoring module in the shell.

[0019] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 is a cross-sectional view of a battery provided by an exemplary embodiment of the present disclosure; Figure 2 is a perspective view of a battery provided by an exemplary embodiment of the present disclosure; Figure 3 is a cross-sectional view of a battery provided in another exemplary embodiment of the present disclosure; Figure 4 is a perspective view of a battery provided by another exemplary embodiment of the present disclosure; Figure 5 is a cross-sectional schematic diagram of a monitoring module provided in another exemplary embodiment of the present disclosure.

[0021] Description of Reference Numerals 1-battery; 10-shell; 11-cavity; 20-battery cell; 21-first battery cell part; 22-second battery cell part; 201-positive electrode sheet; 2010-positive electrode ear; 202-negative electrode sheet; 2020-negative electrode ear; 23-positive electrode column; 24-negative electrode column; 30-monitoring module; 31-positive terminal; 32-negative terminal; 33-monitoring module body; 34-insulating film layer; 35-signal acquisition unit; 351-pressure signal acquisition unit; 352-temperature signal acquisition unit; 353-gas signal acquisition unit; 36-signal processing unit; 37-signal transmission unit. DETAILED DESCRIPTION

[0022] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0023] In the present disclosure, unless otherwise stated, the directional words such as "up", "down", "left", "right", etc. used to indicate directions or positional relationships are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, and a specific orientation structure and operation. Therefore, it cannot be understood as a limitation on the present disclosure. The terms "inside and outside" refer to the inside and outside of the corresponding structural contour.

[0024] In addition, the thickness direction can be found in Figure 1 and Figure 3In the thickness direction shown. In addition, it should be noted that the terms used, such as "first", "second", etc., are used to distinguish one element from another element and do not have order and importance. In addition, in the description with reference to the drawings, the same mark in different drawings represents the same element.

[0025] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "connected", and "installed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0026] refer to Figures 1 to 5 As shown, the first aspect of the present disclosure provides a battery, including a shell 10, a battery cell 20 and a monitoring module 30, the shell 10 has a cavity 11 inside, the battery cell 20 includes a plurality of positive electrode sheets 201 and a plurality of negative electrode sheets 202, the plurality of positive electrode sheets 201 and the plurality of negative electrode sheets 202 are alternately stacked along their own thickness direction and arranged in the cavity 11, the monitoring module 30 is arranged in the cavity 11 and is used to monitor the state of the battery cell 20, and the positive terminal 31 of the monitoring module 30 is electrically connected to the positive electrode tab 2010 of the positive electrode sheet 201, and the negative terminal 32 of the monitoring module 30 is electrically connected to the negative electrode tab 2020 of the negative electrode sheet 202.

[0027] Through the above technical scheme, the above-mentioned monitoring module 30 is arranged in the shell 10 of the battery 1, which can realize real-time monitoring of the state of the battery cell 20, thereby improving the safety, stability and service life of the battery cell 20; and, the positive terminal 31 of the monitoring module 30 in the present disclosure is electrically connected to the positive pole ear 2010 of the positive electrode sheet 201, and the negative terminal 32 of the monitoring module 30 is electrically connected to the negative pole ear 2020 of the negative electrode sheet 202, that is, the positive electrode sheet 201 and the negative electrode sheet 202 can provide electrical energy for the operation of the monitoring module 30, so it can also simplify the overall structure of the monitoring module 30, reduce the occupied space of the monitoring module 30, and make it easier to install and arrange the monitoring module 30 in the shell 10.

[0028] It should be noted that the present disclosure does not limit the connection method between the positive terminal 31 of the monitoring module 30 and the positive electrode ear 2010 of the positive electrode sheet 201. The positive terminal 31 of the monitoring module 30 can be directly connected to the positive electrode ear 2010 of the positive electrode sheet 201, or it can be indirectly connected to the positive electrode ear 2010 of the positive electrode sheet 201. For example, in an exemplary embodiment of an indirect connection provided in the present disclosure, Figure 1 , Figure 3As shown, the positive pole ear 2010 of the positive electrode sheet 201 is electrically connected to the shell 10, and the positive terminal 31 of the monitoring module 30 is connected to the shell 10. That is, the positive terminal 31 of the monitoring module 30 is connected to the positive electrode sheet 201 through the shell 10. On the one hand, compared with the positive pole ear 2010, the shell 10 has a larger area, so it is more convenient to connect the positive terminal 31 of the monitoring module 30 with the shell 10. On the other hand, the positive pole ear 2010 of the positive electrode sheet 201 is electrically connected to the shell 10, so that the shell 10 can be positively charged. For the embodiment in which the shell 10 is made of aluminum, the positively charged shell 10 can also reduce the corrosion of the shell 10 by the outside world, and further improve the service life of the battery 1.

[0029] Alternatively, for an embodiment in which the housing 10 is made of other materials (such as steel), the negative electrode tab 2020 of the negative electrode sheet 202 is electrically connected to the housing 10, and the negative terminal 32 of the monitoring module 30 is connected to the housing 10. In other words, since the negative electrode tab 2020 of the negative electrode sheet 202 is electrically connected to the housing 10, the housing 10 is negatively charged at this time, and thus the corrosion of the housing 10 by water, air, etc. can also be reduced, thereby protecting the housing 10.

[0030] In another exemplary embodiment of indirect connection provided by the present disclosure, Figure 1 , Figure 3 As shown, the battery cell 20 may also include a positive pole 23 and a negative pole 24, the positive pole tabs 2010 of the plurality of positive plates 201 are respectively electrically connected to the positive pole 23, the negative pole tabs 2020 of the plurality of negative plates 202 are respectively electrically connected to the negative pole 24, the positive terminal 31 of the monitoring module 30 is electrically connected to the positive pole 23, and the negative terminal 32 of the monitoring module 30 is welded and connected to the negative pole 24. In this way, after the plurality of positive plates 201 converge to the positive pole 23 and the plurality of negative plates 202 converge to the negative pole 24, the positive terminal 31 of the monitoring module 30 is electrically connected to the positive pole 23, and the negative terminal 32 of the monitoring module 30 is connected to the negative pole 24, so that the plurality of positive plates 201 and the plurality of negative plates 202 jointly supply power to the monitoring module 30, which has better stability and can improve the fault tolerance rate during the power supply process.

[0031] In order to prevent the setting of the monitoring module 30 from affecting the normal arrangement of the positive electrode sheet 201 and the negative electrode sheet 202 in the cavity 11 as much as possible, in an exemplary embodiment provided in the present disclosure, as Figures 1 to 4As shown, the large surface area of ​​the monitoring module 30 is the same as the large surface area of ​​the positive electrode sheet 201 or the large surface area of ​​the negative electrode sheet 202. The large surface area of ​​the monitoring module 30 is the same as the large surface area of ​​the positive electrode sheet 201 and the large surface area of ​​the negative electrode sheet 202. In this way, when the positive electrode sheet 201, the negative electrode sheet 202 and the monitoring module 30 are stacked, one side of the large surface of the positive electrode sheet 201 and / or one side of the large surface of the negative electrode sheet 202 can be completely attached to the large surface of the monitoring module 30, so that the large surface of the positive electrode sheet 201 and / or the large surface of the negative electrode sheet 202 can be completely in contact with the large surface of the monitoring module 30. On the one hand, since the size of the monitoring module 30 is the same as that of the positive electrode sheet The sizes of the positive electrode sheet 201 and the negative electrode sheet 202 are the same, so the influence of the setting of the monitoring module 30 on the stacking and setting of the positive electrode sheet 201 and the negative electrode sheet 202 can be reduced as much as possible. On the other hand, the large surface of the monitoring module 30 is in full contact with the large surface of the positive electrode sheet 201 and / or the negative electrode sheet 202. When supporting the positive electrode sheet 201 and / or the negative electrode sheet 202, the force in different areas of the positive electrode sheet 201 and / or the negative electrode sheet 202 can be made more uniform, thereby reducing the longitudinal stress of the positive electrode sheet 201 and / or the negative electrode sheet 202.

[0032] In the embodiment provided by the present disclosure, the positive terminal 31 of the monitoring module 30 is formed as a conductive connecting piece or a wire; similarly, the negative terminal 32 of the monitoring module 30 is formed as a conductive connecting piece or a wire. In this way, the monitoring module 30 can be electrically connected to the positive electrode sheet 201 and the negative electrode sheet 202 through the conductive connecting piece or the wire.

[0033] The present disclosure does not limit the connection method between the above-mentioned monitoring module 30 and the positive electrode sheet 201 and the negative electrode sheet 202. For example, in one embodiment provided by the present disclosure, the positive terminal 31 of the monitoring module 30 can be electrically connected to the positive electrode ear 2010 of the positive electrode sheet 201 by welding, bonding or other non-detachable methods. Similarly, the negative terminal 32 of the monitoring module 30 can be electrically connected to the negative electrode ear 2020 of the negative electrode sheet 202 by welding, bonding or other non-detachable methods; or, in another embodiment provided by the present disclosure, the positive terminal 31 of the monitoring module 30 can be electrically connected to the positive electrode ear 2010 of the positive electrode sheet 201 by plugging, fastener connection or other detachable methods, and the negative terminal 32 of the monitoring module 30 can be electrically connected to the negative electrode ear 2020 of the negative electrode sheet 202 by plugging, fastener connection or other detachable methods. In short, as long as the electrical connection between the monitoring module 30 and the battery cell 20 can be achieved, the present disclosure does not limit it.

[0034] It should be noted that, in an embodiment in which the positive terminal 31 of the monitoring module 30 is formed as a conductive connecting piece, the conductive connecting piece can be first welded to the positive electrode tab 2010, and then welded to the positive electrode column 23 or the shell 10 together with the positive electrode tab 2010. Similarly, in an embodiment in which the negative terminal 32 of the monitoring module 30 is formed as a conductive connecting piece, the conductive connecting piece can be first welded to the negative electrode tab 2020, and then welded to the negative electrode column 24 together with the positive electrode tab 2010 to realize power supply to the monitoring module 30.

[0035] For the embodiment in which the housing 10 includes a body and a cover plate, the positive terminal 31 of the monitoring module 30 can be welded or bonded to the inner surface of the cover plate.

[0036] In order to further prevent the setting of the monitoring module 30 from causing interference or interference to the operation of the battery cell 20, in the present disclosure, Figure 5 As shown, the monitoring module 30 may include a monitoring module body 33 and an insulating film layer 34, and the insulating film layer 34 is wrapped around the outer periphery of the monitoring module body 33. In this way, when the monitoring module 30 is arranged in the cavity 11, the insulating film layer 34 can isolate the direct contact between the monitoring module body 33 and the positive electrode sheet 201, the negative electrode sheet 202 and the electrolyte, thereby avoiding affecting the normal operation of the battery cell 20, and under the protection of the insulating film layer 34, the monitoring module body 33 can also be prevented from being corroded by the electrolyte, etc., thereby improving the operating stability and service life of the monitoring module 30.

[0037] The present disclosure does not limit the positional relationship between the above-mentioned monitoring module 30 and the battery cell 20. For example, the monitoring module 30 can be set above the battery cell 20, or below the battery cell 20, or the monitoring module 30 can also be set inside the battery cell 20 (i.e., the area between the positive electrode sheet 201 and the negative electrode sheet 202). In short, as long as the monitoring function of the battery cell 20 status can be achieved, it will be fine.

[0038] During the charge and discharge process of the battery 1, lithium ions will move (deintercalate) between the positive electrode sheet 201 and the negative electrode sheet 202. Based on this, if the monitoring module 30 is arranged between the adjacent positive electrode sheet 201 and the negative electrode sheet 202, during the charge and discharge process of the battery 1, the flow and deintercalation of lithium ions between the adjacent positive electrode sheet 201 and the negative electrode sheet 202 will be affected. Therefore, in an exemplary embodiment provided in the present disclosure, if Figure 1 , Figure 2As shown, the monitoring module 30 is disposed between two adjacent positive plates 201. In this way, during the charge and discharge process of the battery 1, compared with the flow of lithium ions between the positive plate 201 and the negative plate 202, the lithium intercalation and deintercalation between the two positive plates 201 is relatively small, and therefore, the influence of the monitoring module 30 on the lithium intercalation and deintercalation during the charge and discharge process of the battery 1 can be reduced.

[0039] When the battery 1 is charged and discharged, the deintercalated lithium in the two positive plates 201 will still be deintercalated and gathered in the area outside the area where the monitoring module 30 contacts the positive plate 201 (at both ends of the positive plate 201), which will cause certain safety risks. Based on this, in another exemplary embodiment provided by the present disclosure, the monitoring module 30 can be arranged between two adjacent negative plates 202. During the charging and discharging process of the battery 1, compared with the technical solution of arranging the monitoring module 30 between the two positive plates 201, there is less deintercalated lithium between the two negative plates 202. Therefore, arranging the monitoring module 30 between the two negative plates 202 can further reduce the impact of the deintercalated lithium during the charging and discharging process of the battery 1.

[0040] In addition, due to the setting of the monitoring module 30, the space between the two positive plates 201 originally used to set the negative plate 202 and the space between the two negative plates 202 originally used to set the positive plate 201 are occupied, so that lithium ions cannot flow between the positive plate 201 and the negative plate 202, which will cause waste of the two positive plates 201 or the two negative plates 202 set on both sides of the monitoring module 30. Compared with the positive plate 201, the cost of the negative plate 202 is relatively lower. Therefore, setting the monitoring module 30 between the two negative plates 202 can further reduce the production and modification costs of the battery 1.

[0041] Alternatively, if Figure 2As shown, the battery cell 20 includes a first battery cell portion 21 and a second battery cell portion 22, which are respectively arranged on both sides of the monitoring module 30, and the first battery cell portion 21 and the second battery cell portion 22 are symmetrically arranged with respect to the monitoring module 30. On the one hand, since the first battery cell portion 21 and the second battery cell portion 22 located on both sides of the monitoring module 30 are symmetrically arranged with respect to the monitoring module 30, the monitoring module 30 arranged in the middle of the battery cell 20 can more evenly sense the working status of the surrounding battery cells 20, including key parameters such as voltage and temperature. This layout helps to reduce monitoring errors caused by position deviations and improve data accuracy and reliability. In addition, the battery cell 20 will generate heat during the charging and discharging process. The monitoring module 30 set in the middle position can more directly monitor the heat distribution, and provide accurate input data for the thermal management system so that the weight distribution of the battery cells 20 located above and below the monitoring module 30 can be more evenly distributed. On the other hand, the first battery cell group and the second battery cell group are symmetrically arranged, that is, the dimensions and other parameters of the first battery cell group and the second battery cell group are the same, and the same components and processes can be reused on the two battery cell groups, reducing the difficulty of processing, assembly and production costs.

[0042] Alternatively, in another exemplary embodiment provided by the present disclosure, Figure 3 , Figure 4 As shown, the monitoring module 30 can be arranged between the inner wall of the housing 10 and the battery cell 20 to prevent the side of the battery cell 20 close to the housing 10 from contacting the inner wall of the housing 10. The monitoring module 30 arranged between the inner wall of the housing 10 and the battery cell 20 can separate the battery cell 20 from the housing 10, thereby blocking the contact path between the battery cell 20 and the housing 10 at the same time, and avoiding the short circuit problem caused by the battery cell 20 touching the housing.

[0043] In this disclosure, Figure 3 As shown, the battery cell 20 closest to the inner wall of the shell 10 can be a positive electrode sheet 201 or a negative electrode sheet 202. For the implementation embodiment in which the battery cell 20 closest to the shell 10 is the positive electrode sheet 201, under the blocking effect of the monitoring module 30, the problem of short circuit between the positive electrode sheet 201 and the shell 10 when it is negatively charged can be avoided. For the implementation embodiment in which the battery cell 20 closest to the shell 10 is the negative electrode sheet 202, under the blocking effect of the monitoring module 30, the problem of short circuit between the positive electrode sheet 201 and the shell 10 when it is positively charged can be avoided.

[0044] Alternatively, if Figure 5As shown, the monitoring module 30 includes a signal acquisition unit 35, a signal processing unit 36 ​​and a signal transmission unit 37. The signal processing unit 36 ​​is connected to the signal acquisition unit 35 and the signal transmission unit 37 respectively. The signal transmission unit 37 is used to send the signal collected by the signal acquisition unit 35 to the battery management system. Under the joint cooperation of the signal acquisition unit 35, the signal processing unit 36 ​​and the signal transmission unit 37, the battery management system can evaluate the life and safety status of the battery 1 according to the multi-dimensional parameter information, and take certain measures to actively regulate the state of the battery cell 20.

[0045] Specifically, the monitoring module 30 monitoring the battery cell 20 may include steps such as signal acquisition, data cleaning (screening out errors and useless data), data mining, battery cell 20 status assessment, and active regulation.

[0046] The present disclosure does not limit the type of signal collected by the signal collection unit 35. For example, in an exemplary embodiment provided by the present disclosure, Figure 5 As shown, the signal acquisition unit 35 may be one or more of a pressure signal acquisition unit 351, a temperature signal acquisition unit 352, and a gas signal acquisition unit 353. The battery 1 generates gas, heat, and a large pressure during the charge and discharge process. By acquiring the temperature in the battery pack, the thermal state of the battery 1 can be monitored in real time, and heat dissipation measures can be taken in time to prevent the occurrence of thermal runaway. By acquiring the pressure, the pressure change inside the battery 1 can be monitored in real time, and measures can be taken in time to reduce the pressure, avoid the occurrence of safety accidents, and understand the chemical reaction conditions and gas generation mechanism inside the battery 1; by collecting gas samples in the battery 1, the gas composition and concentration inside the battery 1 can be analyzed, the chemical reaction conditions and gas generation mechanism inside the battery 1 can be understood, and it can be predicted whether there is an explosion risk inside the battery 1, and corresponding preventive measures can be taken.

[0047] For the implementation of the signal acquisition unit 35 being multiple of the pressure signal acquisition unit 351, the temperature signal acquisition unit 352, and the gas signal acquisition unit 353, as shown in FIG. Figure 5 As shown, the multiple signal acquisition units 35 may be connected in series or in parallel, and the present disclosure does not limit this.

[0048] The second aspect of the present disclosure provides a battery pack, comprising a battery pack housing and a plurality of batteries 1 as described above, wherein the plurality of batteries 1 are electrically connected and arranged in the battery pack housing. The battery pack has all the beneficial effects of the above-mentioned battery 1, and since each battery 1 is provided with the above-mentioned monitoring module 30, it is possible to achieve real-time monitoring of multiple points in the battery pack, thereby improving the accuracy and reliability of monitoring the battery pack.

[0049] The third aspect of the present disclosure provides an electric device, comprising the above battery 1 or the above battery pack. Thus, the above battery 1 or the battery pack can supply power to the electric device to meet the power demand of the electric device.

[0050] Here, the electrical equipment may be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, electric tools, etc. Vehicles may be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles may be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc.; spacecraft include airplanes, rockets, space shuttles and spacecrafts, etc.; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc., which are not limited in the present disclosure.

[0051] Optionally, when the electrical device is a vehicle, the device body may be the body of the vehicle, and the battery pack may be installed on the body of the vehicle to provide power for the operation of the vehicle.

[0052] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0053] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0054] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A battery, characterized in that: include: A housing, wherein the interior of the housing has a cavity; A battery cell, the battery cell comprising a plurality of positive electrode sheets and a plurality of negative electrode sheets, wherein the plurality of positive electrode sheets and the plurality of negative electrode sheets are alternately stacked along their own thickness direction and arranged in the cavity; A monitoring module is arranged in the cavity and is used to monitor the state of the battery cell, and the positive terminal of the monitoring module is electrically connected to the positive electrode tab of the positive electrode sheet, and the negative terminal of the monitoring module is electrically connected to the negative electrode tab of the negative electrode sheet.

2. The battery according to claim 1, characterized in that The positive electrode tab of the positive electrode sheet is electrically connected to the shell.

3. The battery according to claim 2, characterized in that The positive terminal of the monitoring module is connected to the shell.

4. The battery according to claim 1, characterized in that The battery cell also includes a positive electrode column and a negative electrode column. The positive electrode tabs of the multiple positive electrode sheets are electrically connected to the positive electrode columns, and the negative electrode tabs of the multiple negative electrode sheets are electrically connected to the negative electrode columns. The positive end of the monitoring module is electrically connected to the positive electrode column, and the negative end of the monitoring module is welded to the negative electrode column.

5. The battery according to claim 1, characterized in that The large surface area of ​​the monitoring module is the same as the large surface area of ​​the positive electrode sheet or the large surface area of ​​the negative electrode sheet.

6. The battery according to claim 1, characterized in that The positive terminal of the monitoring module is formed as a conductive connecting piece or a wire; The negative terminal of the monitoring module is formed as a conductive connecting piece or a wire.

7. The battery according to claim 1, characterized in that The monitoring module comprises a monitoring module body and an insulating film layer, wherein the insulating film layer is wrapped around the outer periphery of the monitoring module body.

8. The battery according to any one of claims 1 to 7, characterized in that The monitoring module is disposed between two adjacent negative electrode sheets, or the monitoring module is disposed between two adjacent positive electrode sheets.

9. The battery according to claim 8, characterized in that The battery cell includes a first battery cell portion and a second battery cell portion, wherein the first battery cell portion and the second battery cell portion are respectively arranged on two sides of the monitoring module, and the first battery cell portion and the second battery cell portion are symmetrically arranged with respect to the monitoring module.

10. The battery according to any one of claims 1 to 7, characterized in that The monitoring module is arranged between the inner wall of the shell and the battery core to prevent the side of the battery core close to the shell from contacting the inner wall of the shell.

11. The battery according to any one of claims 1 to 7, characterized in that The monitoring module includes a signal acquisition unit, a signal processing unit and a signal transmission unit. The signal processing unit is signal-connected to the signal acquisition unit and the signal transmission unit respectively. The signal transmission unit is used to send the signal collected by the signal acquisition unit to the battery management system.

12. The battery according to claim 11, characterized in that The signal acquisition unit is one or more of a pressure signal acquisition unit, a temperature signal acquisition unit and a gas signal acquisition unit.

13. A battery pack, characterized in that: The invention comprises a battery pack housing and a plurality of batteries according to any one of claims 1 to 12, wherein the plurality of batteries are electrically connected and arranged in the battery pack housing.

14. An electrical device, characterized in that: Comprising the battery according to any one of claims 1 to 12 or the battery pack according to claim 13.

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