Battery, energy storage apparatus, and electric device

Abstract

An electric device, comprising an energy storage apparatus. The energy storage apparatus comprises a battery (100), the battery (100) comprising a housing (10), a battery cell (20), a polar column and a reference electrode assembly (40), wherein the battery cell (20) is accommodated inside the housing (10), and the polar column is connected to the housing (10); and one end of the reference electrode assembly (40) is provided between a positive electrode sheet (21) and a negative electrode sheet (23) of the battery cell (20), a reference column of the reference electrode assembly (40) is connected to the polar column and is exposed out of the housing (10), and the reference electrode assembly (40) is insulated from the battery cell (20) and the polar column.

Description

Batteries, energy storage devices and electrical equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to a Chinese patent application filed on October 31, 2023, with application number 202322941873.X and patent application name “Batteries, Energy Storage Devices and Electrical Equipment,” all contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of energy storage technology, and in particular to a battery, an energy storage device, and an electrical device. Background Art

[0004] Traditional lithium-ion secondary batteries have only two electrodes, positive and negative, that transmit both energy and signals. However, in production practice, particularly in large-scale integrated power and energy storage applications, the lack of a reference potential prevents real-time monitoring of the potential states of the battery's positive and negative electrodes, hindering intelligent control.

[0005] In related technologies, some batteries are constructed by destroying the battery casing to drill holes in the side, bottom, or top of the casing to lead out reference electrode wires and monitor the potential state of the electrode. Drilling holes in the casing damages the casing, undermining its integrity and affecting its sealing reliability and strength.

[0006] Summary of the Invention

[0007] The purpose of the present application is to provide a battery, an energy storage device and an electrical device to solve the problem that the battery shell is punched with holes to lead out the reference electrode wire, thereby destroying the integrity of the shell and affecting the sealing reliability and shell strength.

[0008] To achieve the purpose of this application, this application provides the following technical solutions:

[0009] In a first aspect, the present application provides a battery, comprising: a shell, a battery cell and an electrode, wherein the battery cell is accommodated inside the shell and the electrode is connected to the shell; a reference electrode assembly, one end of which is arranged between the positive electrode sheet and the negative electrode sheet of the battery cell, the reference electrode assembly having a reference column connected to the electrode and exposed to the outside of the shell, and the reference electrode assembly is insulated from the battery cell and the electrode.

[0010] In one embodiment, the pole is provided with a wiring hole, and the reference pole includes a terminal, and the terminal is received in the wiring hole.

[0011] In one embodiment, the reference electrode assembly further includes an electrode wire, one end of the electrode wire is connected to the terminal, and the electrode wire extends between the positive electrode sheet and the negative electrode sheet of the battery cell.

[0012] In one embodiment, the reference electrode assembly further includes an active portion, the active portion is located between the positive electrode sheet and the negative electrode sheet of the battery cell, and one end of the electrode wire away from the terminal is connected to the active portion.

[0013] In one embodiment, the active portion is located in a middle region of the battery cell in a height direction of the shell; and / or the active portion is located in a middle region of the battery cell in a radial direction of the shell.

[0014] In one embodiment, the portion of the electrode wire located between the positive electrode sheet and the negative electrode sheet of the battery cell is located in the middle region of the shell in the height direction.

[0015] In one embodiment, the orthographic projection of the portion of the electrode wire located between the battery core and the positive electrode sheet and the negative electrode sheet in the height direction of the shell is a spiral line.

[0016] In one embodiment, the reference column further includes an insulating tube, the insulating tube is passed through the wiring hole, the outer wall of the insulating tube is connected to the inner wall of the wiring hole, and the terminal is arranged at the center hole of the insulating tube.

[0017] In one embodiment, the terminal extends out of an end portion of the insulating tube located on an external side of the housing.

[0018] In one embodiment, the insulating tube further extends into the space enclosed by the battery core, and the electrode wire is at least partially located in the central hole of the insulating tube.

[0019] In one embodiment, the insulating tube at least partially extends out of the end portion of the pole located outside the housing.

[0020] In one embodiment, the outer surface of the active portion is covered with an insulating film.

[0021] In one embodiment, the material of the active portion includes any one of lithium metal, lithium intercalation oxide and lithium alloy, wherein the lithium intercalation oxide is any one of lithium titanate and lithium iron phosphate, and the lithium alloy is any one of lithium aluminum, lithium tin and lithium bismuth.

[0022] In one embodiment, the pole includes a positive pole and a negative pole, and one of the positive pole and the negative pole is provided with the wiring hole.

[0023] In one embodiment, the battery is a cylindrical battery.

[0024] In one embodiment, the battery cell is a wound battery cell.

[0025] In a second aspect, the present application further provides an energy storage device, comprising a battery according to any one of the various embodiments of the first aspect.

[0026] In a third aspect, the present application further provides an electrical device, comprising an electrical device and the energy storage device described in the second aspect, wherein the energy storage device supplies power to the electrical device.

[0027] By setting one end of the reference electrode assembly between the positive and negative plates of the battery cell, and connecting the reference column to the pole and exposing it to the outside of the shell, the reference potential of the battery cell can be monitored. The reference column of the reference electrode assembly is set using the pole of the battery, and the reference column of the reference electrode assembly and the pole of the battery are integrated. Only an area for accommodating both the reference column and the pole needs to be reserved on the shell. In addition to setting the pole, the shell does not require additional holes for setting the reference column. The structure is simple, and there is no need to drill multiple holes on the shell, which ensures the integrity of the shell and does not affect the sealing reliability and shell strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the implementation methods or the description of the prior art. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] FIG1 is a perspective view of a battery according to an embodiment;

[0030] FIG2 is a longitudinal cross-sectional view of a battery according to an embodiment;

[0031] FIG3 is a transverse cross-sectional view of a battery according to an embodiment.

[0032] Description of reference numerals:

[0033] 100-battery;

[0034] 10-housing, 11-cylinder, 12-first end cover, 13-second end cover;

[0035] 20-battery cell, 21-positive electrode sheet, 22-diaphragm; 23-negative electrode sheet;

[0036] 31-positive electrode ear, 32-negative electrode ear, 33-positive electrode post, 331-wiring hole, 34-negative electrode post;

[0037] 40 - reference electrode assembly, 41 - terminal, 42 - electrode wire, 43 - active portion, 44 - insulating tube, 441 - center hole. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0039] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be an intermediate component. When a component is referred to as being "connected to" another component, it may be directly connected to the other component or there may be an intermediate component.

[0040] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used in this application includes any and all combinations of one or more of the relevant listed items.

[0041] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0042] The present invention provides an electrical device comprising an electrical device and an energy storage device according to the present invention. The electrical device may be a household appliance, an industrial load, a commercial load, an electric vehicle, or the like, specifically, a home lighting system, a base station, or mechanical equipment, without limitation. The energy storage device has a simple structure, does not require drilling holes in the battery housing to damage the housing's integrity, and has high sealing reliability and reliability.

[0043] Please refer to Figures 1 to 3. An embodiment of the present application provides an energy storage device, including a battery 100 provided in an embodiment of the present application. The energy storage device may include multiple batteries 100 to form a battery pack. The energy storage device can be applied to household energy storage scenarios, electric vehicle scenarios, power grid scenarios, etc. In household energy storage scenarios, for example, the electricity generated by the user's photovoltaic panels can be stored and used to power the electrical loads in the user's home. In electric vehicle scenarios, for example, the electricity charged by the charging pile can be stored and supplied to the car's motor and other driving mechanisms to drive the car. In power grid scenarios, for example, electricity during peak power generation or low power consumption can be stored, and the electricity can be supplied to the power grid during low power generation or peak power consumption to achieve peak-shifting allocation of electricity and reduce power grid fluctuations.

[0044] The energy storage device of the embodiment of the present application adopts the battery 100 of the embodiment of the present application. By setting one end of the reference electrode assembly 40 between the positive electrode sheet 21 and the negative electrode sheet 23 of the battery cell 20, and the reference column is connected to the pole and exposed to the outside of the shell 10, the reference potential of the battery cell 20 can be monitored. The reference column of the reference electrode assembly 40 is set using the pole of the battery 100, and the reference column of the reference electrode assembly 40 and the pole of the battery 100 are integrated. It is only necessary to reserve an area on the shell 10 to accommodate both the reference column and the pole. In addition to setting the pole, the shell 10 does not require additional holes for setting the reference column. The structure is simple, avoids opening multiple holes on the shell 10, can ensure the integrity of the shell 10, and does not affect the sealing reliability and strength of the shell 10.

[0045] Referring to Figures 1 to 3, Figure 1 is a perspective view of a battery according to one embodiment, Figure 2 is a longitudinal cross-sectional view of a battery according to one embodiment, and Figure 3 is a transverse cross-sectional view of a battery according to one embodiment. The housing 10 is omitted in Figure 3. This embodiment of the present application provides a battery 100 comprising a housing 10, a battery cell 20, an electrode post, and a reference electrode assembly 40.

[0046] The battery 100 can be a cylindrical battery, a square-shell battery, a prismatic battery, etc., without limitation. Specifically, the shell 10 of the cylindrical battery is cylindrical, the shell 10 of the square-shell battery is a rectangular parallelepiped, and the shell 10 of the prismatic battery is prismatic. Taking the cylindrical battery shown in Figures 1 and 2 as an example, the shell 10 includes a cylinder 11, a first end cover 12 and a second end cover 13, and the first end cover 12 and the second end cover 13 close the two ends of the cylinder 11. For shells 10 of other shapes, they are not described in detail, and reference can be made to relevant literature. The material of the shell 10 can be aluminum alloy, or any other feasible material such as alloy steel, without limitation. Optionally, taking a cylindrical battery as an example, the outer diameter of the shell 10 is 18mm-46mm, and the height (i.e., the dimension along the axis of the cylinder) is 65mm-80mm.

[0047] The battery cell 20 is housed inside the shell 10, and the battery cell 20 includes a positive electrode sheet 21, a separator 22, and a negative electrode sheet 23 stacked in sequence. The battery cell 20 can be made by winding, lamination, or other assembly forms. Taking a cylindrical battery assembled in a wound manner as an example, the stacked positive electrode sheet 21, separator 22, and negative electrode sheet 23 are wound to form a cylindrical battery cell 20 to be housed in the cylindrical internal space of the shell 10. The positive electrode sheet 21 may include a positive electrode current collector (not shown in the figure) and a positive electrode active material (not shown in the figure) arranged on two opposite surfaces of the positive electrode current collector, and the negative electrode sheet 23 may include a negative electrode current collector (not shown in the figure) and a negative electrode active material (not shown in the figure) arranged on two opposite surfaces of the negative electrode current collector. The positive electrode current collector is connected to the positive electrode tab 31, wherein the positive electrode tab 31 can be a portion of the structure extending from the positive electrode current collector, that is, the positive electrode tab 31 can be an integral structure with the positive electrode current collector. Of course, the positive electrode tab 31 can also be connected to the positive electrode current collector by welding or other methods. The negative electrode current collector is connected to the negative electrode tab 32, wherein the negative electrode tab 32 can be a portion of the structure extending from the negative electrode current collector, that is, the negative electrode tab 32 can be an integral structure with the negative electrode current collector. Of course, the negative electrode tab 32 can also be connected to the negative electrode current collector by welding or other methods.

[0048] The pole is roughly columnar, and can be a cylinder or a cylinder with steps, without limitation. The pole is connected to the battery cell 20 and is exposed from the end of the shell 10. The pole can extend to the outside of the shell 10, or it can be flush with the shell 10, or it can be concave relative to the outer surface of the shell 10. The pole includes a positive pole 33 and a negative pole 34. The shapes and sizes of the positive pole 33 and the negative pole 34 can be the same or different, without limitation. The positive pole 33 passes through the first end cover 12 and is connected to the positive ear 31, and the negative pole 34 passes through the second end cover 13 and is connected to the negative ear 32. Both the positive pole 33 and the negative pole 34 are exposed to the outside of the shell 10 for connection to external charging or electrical equipment. FIG2 shows an embodiment in which the positive electrode column 33 and the negative electrode column 34 are respectively disposed at both ends of the housing 10. In other embodiments, the positive electrode column 33 and the negative electrode column 34 may also be disposed at the same end of the housing 10, and the corresponding positive electrode tab 31 and negative electrode tab 32 are also disposed at the same end of the housing 10. Optionally, the outer diameter of the cylindrical column (i.e., the positive electrode column 33 and the negative electrode column 34) may be 5 mm to 30 mm, and the height (i.e., the axial length) may be 5 mm to 10 mm.

[0049] One end of the reference electrode assembly 40 is disposed between the positive electrode sheet 21 and the negative electrode sheet 23 of the battery cell 20. The reference column of the reference electrode assembly 40 is connected to the electrode and exposed to the outside of the shell 10. The reference electrode assembly 40 is insulated from the battery cell 20 and the electrode. The specific structure of the reference electrode assembly 40 is not limited. The reference column can be exposed to the outside of the shell 10 from the end of the electrode outside the shell 10. Specifically, the reference column can protrude from the end face of the electrode outside the shell 10, or be flush with the end face of the electrode outside the shell 10, or be concave relative to the end face of the electrode outside the shell 10. The reference column can also be exposed to the outside of the shell 10 from the outer peripheral surface of one end of the electrode outside the shell 10, and can be protruding, flush, or concave relative to the outer peripheral surface. There is no limitation. The reference electrode assembly 40 is insulated from the battery cell 20 and the electrode column to prevent interference between the normal charge and discharge signals of the battery 100 and the reference potential monitoring signal of the reference electrode assembly 40 due to a short circuit. In this way, the battery 100 forms a three-electrode structure, namely, the positive electrode of the positive electrode column 33, the negative electrode of the negative electrode column 34, and the reference electrode assembly 40 form the reference potential monitoring electrode.

[0050] During use, taking the reference column at the positive column 33 as an example, an external charging device or an electrical device charges the battery cell 20 through the positive column 33 and the negative column 34, or the battery cell 20 supplies power to the electrical device. At the same time, the reference potential monitoring device is connected to the reference column to monitor the reference potential of the battery cell 20. The reference potential monitoring device can be integrated with the charging device and the electrical device to form an integrated interface, so as to be connected to the positive column 33 through one interface, so as to realize dual signal channel connection with one clamping, simplify the testing work, improve the convenience and efficiency of the test, and prevent mistakes from the design end, avoiding connection errors by the tester. After the reference potential of the battery cell 20 is monitored by the reference electrode assembly 40, the positive and negative electrode potentials can be monitored in real time respectively, and the status of the positive electrode sheet 21 and the negative electrode sheet 23 can be understood, thereby improving the readability of the battery 100 and promoting intelligent control in the field of large-scale integrated power and energy storage batteries. The pole design integrating the reference signal and the positive electrode signal (or negative electrode signal) eliminates the exposed, movable reference electrode wire and replaces it with a fixed-shape reference electrode assembly 40, which is conducive to forming a standardized three-electrode battery and facilitates the promotion of three-electrode batteries.

[0051] In the embodiment of the present application, by setting one end of the reference electrode assembly 40 between the positive electrode sheet 21 and the negative electrode sheet 23 of the battery cell 20, the reference column is connected to the pole and exposed to the outside of the shell 10, so as to realize the monitoring of the reference potential of the battery cell 20, and the reference column of the reference electrode assembly 40 is set by using the pole of the battery 100, and the reference column of the reference electrode assembly 40 and the pole of the battery 100 are integrated. It is only necessary to reserve an area on the shell 10 to accommodate both the reference column and the pole. In addition to setting the pole, the shell 10 does not need to open additional holes to set the reference column. The structure is simple, and there is no need to drill multiple holes on the shell 10, which will not damage the shell 10, thereby ensuring the integrity of the shell 10 and not affecting the sealing reliability and strength of the shell 10.

[0052] In one embodiment, please refer to Figures 1 to 3, the pole is provided with a wiring hole 331. In the embodiment of the present application, the positive pole 33 is provided with a wiring hole 331, and the negative pole 34 is not provided with a wiring hole 331 as an example. It should be understood that the negative pole 34 may also be provided with a wiring hole 331, and the positive pole 33 may not be provided with a wiring hole 331, that is, one of the positive pole 33 and the negative pole 34 may be provided with a wiring hole 331. The wiring hole 331 extends along the axial direction of the pole and passes through the pole, so that the inside and outside of the shell 10 can be connected through the wiring hole 331. Optionally, the size of one of the poles (such as the positive pole 33) with the wiring hole 331 may be larger than the other pole (such as the negative pole 34) to ensure sufficient strength.

[0053] The reference column includes a terminal 41 , and the terminal 41 is received in the wiring hole 331 .

[0054] Terminal 41 is made of a conductive metal material, such as copper, aluminum, etc., without limitation. Terminal 41 is housed in wiring hole 331 and fixed relative to the pole to facilitate connection with a reference potential monitoring device. Terminal 41 is also insulated from the pole to avoid short circuits and signal crosstalk. The diameter of terminal 41 can be 2mm-20mm, and the length of terminal 41 extending from the pole can be 2mm-50mm. The extension of terminal 41 from the pole makes it easier for terminal 41 to be connected to a reference potential monitoring device to achieve signal acquisition.

[0055] The reference electrode assembly 40 also includes an electrode wire 42, one end of which is connected to the terminal 41, and the electrode wire 42 extends between the positive electrode sheet 21 and the negative electrode sheet 23 of the battery cell 20. When the battery cell 20 is a wound battery cell, the electrode wire 42 can be wound along with the positive electrode sheet 21 and the negative electrode sheet 23. When the battery cell 20 is a laminated battery cell, the electrode wire 42 can be placed between the positive electrode sheet 21 and the negative electrode sheet 23 during the stacking process. The electrode wire 42 can be connected to one end of the terminal 41 located in the wiring hole 331, or it can be connected to any other position of the terminal 41 without limitation.

[0056] The electrode wire 42 is made of a conductive metal material, such as copper, nickel, or platinum. It is a flexible structure and can be a metal wire or metal strip, without limitation. The outer surface of the electrode wire 42 can be covered with an insulating material to prevent contact with the electrode post, battery cell 20, or housing 10, which could cause a short circuit. For example, if the electrode wire 42 is a metal wire, its diameter can range from 10 μm to 500 μm.

[0057] The reference electrode assembly 40 further includes an active portion 43 , which is located between the positive electrode sheet 21 and the negative electrode sheet 23 of the battery cell 20 . One end of the electrode wire 42 away from the terminal 41 is connected to the active portion 43 .

[0058] The active portion 43 is made of a metallic conductive material. The material of the active portion 43 includes any one of lithium metal, lithium intercalation oxide, and lithium alloy. The lithium intercalation oxide is any one of lithium titanate and lithium iron phosphate, and the lithium alloy is any one of lithium aluminum, lithium tin, and lithium bismuth. The active portion 43 is located between the positive electrode sheet 21 and the negative electrode sheet 23 within the battery cell 20. A capacitor is formed between the active portion 43 and the positive electrode sheet 21 and the negative electrode sheet 23. By monitoring the signal of the active portion 43, it can be used to monitor the reference potential, thereby achieving real-time monitoring of the positive and negative electrode potentials, and understanding the status of the positive electrode sheet 21 and the negative electrode sheet 23. Optionally, the outer surface of the active portion 43 is covered with an insulating film. The material of the insulating film is not limited. By providing the insulating film, the active portion 43 is separated from the positive electrode sheet 21 and the negative electrode sheet 23 to prevent direct contact and short circuit.

[0059] In one embodiment, referring to Figures 2 and 3 , the active portion 43 is located in the middle region of the battery cell 20 in the height direction of the housing 10 (e.g., the axial direction of a cylindrical battery). The electrical activity of the positive electrode sheet 21 and the negative electrode sheet 23 at this location more accurately reflects the potential of the entire battery cell 20. The provision of the active portion 43 at this location enables more accurate monitoring of the reference potential of the battery cell 20. Alternatively, the active portion 43 is located in the middle region of the battery cell 20 in the radial direction of the housing 10. The provision of the active portion 43 at this location is also primarily for more accurate monitoring of the reference potential of the battery cell 20.

[0060] Optionally, taking the battery cell 20 as a wound battery cell as an example, the electrode wire 42 is wound from the middle area of ​​the battery cell 20 in the height direction of the shell 10, following the positive electrode sheet 21 and the negative electrode sheet 23 of the battery cell 20. That is, the electrode wire 42 first extends to the middle area in the height direction of the innermost circle of the battery cell 20, and then winds along with the battery cell 20. The portion of the electrode wire 42 wound along with the battery cell 20 is roughly located on the same plane. In other words, the portion of the electrode wire 42 located between the positive electrode sheet 21 and the negative electrode sheet 23 of the battery cell 20 is located in the middle area in the height direction of the shell 10. In this way, the length of the electrode wire 42 can be reduced, and it can also be conveniently wound with the battery cell 20.

[0061] It is understandable that, for laminated cells, the portion of the electrode wire 42 located between the positive electrode sheet 21 and the negative electrode sheet 23 of the cell 20 may also be arranged in the middle region in the height direction of the housing 10 .

[0062] Optionally, the orthographic projection of the portion of the electrode wire 42 located between the positive electrode sheet 21 and the negative electrode sheet 23 of the battery cell 20 in the height direction of the housing 10 is a spiral. For a wound battery cell, the spiral is generally a circular spiral, and for a laminated battery cell, the spiral can be a flat spiral. In this way, the electrode wire 42 is wound or laminated with the battery cell 20 and is arranged between the positive electrode sheet 21 and the negative electrode sheet 23 of the battery cell 20, which facilitates manufacturing and has good structural stability.

[0063] In one embodiment, referring to Figures 2 and 3 , the reference column further includes an insulating tube 44, which is inserted into the wiring hole 331. The outer wall of the insulating tube 44 is connected to the inner wall of the wiring hole 331, and the terminal 41 is disposed at the center hole 441 of the insulating tube 44. Optionally, the terminal 41 extends from the end of the insulating tube 44 located outside the housing 10.

[0064] The insulating tube 44 is a tube extending in a straight line, and its center hole 441 passes through both ends of the straight line. There is no limit on the wall thickness of the insulating tube 44, and the diameter of the center hole 441 is determined according to the diameter of the terminal 41. The insulating tube 44 is made of an insulating material, such as plastic, insulating film, etc., and can be a hard or soft structure without limitation. The outer wall of the insulating tube 44 and the inner wall of the wiring hole 331 can be connected by bonding, interference fit, etc., without limitation. The insulating tube 44 is connected and fixed to the pole to provide a mounting base for the terminal 41. The terminal 41 and the center hole 441 of the insulating tube 44 can be connected and fixed by bonding, interference fit, etc., so that the terminal 41 and the pole are installed and fixed, and the terminal 41 and the pole are insulated.

[0065] By providing the insulating tube 44 , the terminal 41 and the pole can be fixed and insulated with each other through a simple structure, which has a simple structure, is easy to install and has a low cost.

[0066] Optionally, the battery cell 20 is a wound cell, and the insulating tube 44 further extends into the space enclosed by the battery cell 20, with the electrode wire 42 at least partially located within the central hole 441 of the insulating tube 44. After the positive electrode sheet 21, separator 22, and negative electrode sheet 23 are wound, a central space is formed to accommodate the insulating tube 44. This allows at least a portion of the electrode wire 42 to extend within the central hole 441, meaning that the insulating tube 44 also provides space for routing the electrode wire 42, thereby preventing short circuits between the electrode wire 42 and the battery cell 20. Optionally, the pole is arranged at the center of the end cover, that is, the positive pole 33 is arranged at the center of the first end cover 12, and the negative pole 34 is arranged at the center of the second end cover 13. The insulating tube 44 is passed through the positive pole 33 and extends into the space enclosed by the battery cell 20 inside the shell 10. The insulating tube 44 can act as a winding core for winding the battery cell 20, that is, the positive electrode sheet 21, the diaphragm 22 and the negative electrode sheet 23 can be wound around the insulating tube 44. There is no limit to the length of the insulating tube 44 extending into the interior of the shell 10. Optionally, the end of the insulating tube 44 extending into the interior of the shell 10 roughly corresponds to the middle area of ​​the battery cell 20 in the height direction of the shell 10. In this way, the electrode wire 42 extending from the insulating tube 44 directly begins to be wound with the battery cell 20 without extending along the height direction of the shell 10, thereby reducing the risk of short circuit between the electrode wire 42 and the battery cell 20.

[0067] Alternatively, for laminated battery cells or other types of battery cells, the battery cells 20 may be provided with a space enclosed therein and the insulating tube 44 may extend into the space, without limitation.

[0068] Optionally, referring to Figure 2, the insulating tube 44 at least partially extends out of the end of the pole located outside the housing 10. In this way, the insulation effect between the terminal 41 and the pole can be enhanced, further reducing the risk of short circuit.

[0069] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", and "outside" are based on the orientation or positional relationship described in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present application.

[0070] The above disclosure is only a preferred embodiment of the present application, and certainly cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present application are still within the scope covered by the present application.

Claims

1. A battery (100), wherein: include: A shell (10), a battery cell (20) and a pole, wherein the battery cell (20) is accommodated in the shell (10) and the pole is connected to the shell (10); A reference electrode assembly (40), one end of the reference electrode assembly (40) is arranged between the positive electrode sheet (21) and the negative electrode sheet (23) of the battery cell (20), a reference column of the reference electrode assembly (40) is connected to the electrode column and exposed to the outside of the shell (10), and the reference electrode assembly (40) is insulated from the battery cell (20) and the electrode column.

2. The battery (100) according to claim 1, wherein: The pole is provided with a wiring hole (331), and the reference pole comprises a terminal (41), and the terminal (41) is accommodated in the wiring hole (331).

3. The battery (100) according to claim 2, wherein: The reference electrode assembly (40) further comprises an electrode wire (42), one end of the electrode wire (42) being connected to the terminal (41), and the electrode wire (42) extending between the positive electrode sheet (21) and the negative electrode sheet (23) of the battery cell (20).

4. The battery (100) according to claim 3, wherein: The reference electrode assembly (40) further comprises an active portion (43), wherein the active portion (43) is located between the positive electrode sheet (21) and the negative electrode sheet (23) of the battery cell (20), and one end of the electrode wire (42) away from the terminal (41) is connected to the active portion (43).

5. The battery (100) according to claim 4, wherein: The active portion (43) is located in a middle region of the battery core (20) in a height direction of the shell (10); and / or the active portion (43) is located in a middle region of the battery core (20) in a radial direction of the shell (10).

6. The battery (100) according to claim 4 or 5, wherein: The portion of the electrode wire (42) located between the positive electrode sheet (21) and the negative electrode sheet (23) of the battery cell (20) is located in the middle region of the battery cell (20) in the height direction of the housing (10).

7. The battery (100) according to any one of claims 4 to 6, wherein: The orthographic projection of the portion of the electrode wire (42) located between the battery core (20) and the positive electrode sheet (21) and the negative electrode sheet (23) in the height direction of the shell (10) is a spiral line.

8. The battery (100) according to any one of claims 3 to 7, wherein: The reference column also includes an insulating tube (44), the insulating tube (44) is inserted into the wiring hole (331), the outer wall of the insulating tube (44) is connected to the inner wall of the wiring hole (331), and the terminal (41) is arranged at the center hole (441) of the insulating tube (44).

9. The battery (100) according to claim 8, wherein: The terminal (41) extends out of an end portion of the insulating tube (44) located on the outside of the housing (10).

10. The battery (100) according to claim 8 or 9, wherein: The insulating tube (44) also extends into the space enclosed by the battery core (20), and the electrode wire (42) is at least partially located in the central hole (441) of the insulating tube (44).

11. The battery (100) according to any one of claims 8 to 10, wherein: The insulating tube (44) at least partially extends out of the end of the pole located on the outer side of the housing (10).

12. The battery (100) according to any one of claims 4 to 7, wherein: The outer surface of the active portion (43) is covered with an insulating film.

13. The battery (100) according to any one of claims 4 to 7, wherein: The material of the active part (43) includes any one of lithium metal, lithium intercalation oxide and lithium alloy, wherein the lithium intercalation oxide is any one of lithium titanate and lithium iron phosphate, and the lithium alloy is any one of lithium aluminum, lithium tin and lithium bismuth.

14. The battery (100) according to any one of claims 2 to 13, wherein: The pole comprises a positive pole and a negative pole, and one of the positive pole and the negative pole is provided with the wiring hole (331).

15. The battery (100) according to any one of claims 1 to 14, wherein: The battery (100) is a cylindrical battery.

16. The battery (100) according to any one of claims 1 to 14, wherein: The battery core (20) is a wound battery core.

17. An energy storage device, wherein: Comprising the battery (100) according to any one of claims 1 to 16.

18. An electrical device, wherein: It comprises an electric device and an energy storage device as claimed in claim 17, wherein the energy storage device supplies power to the electric device.

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