A battery device, energy storage equipment

Abstract

The embodiment of the present application provides a battery device, comprising: a battery body comprising a positive electrode and a negative electrode; a box body comprising a metal part used for accommodating the battery body, wherein an insulating material is arranged between the metal part and the battery body; a detection device comprising a first port and a second port, wherein the first port is connected with the positive electrode, and the second port is connected with the metal part; or the first port is connected with the negative electrode, and the second port is connected with the metal part, and the detection device is used for detecting a voltage difference between the first port and the second port; and a presentation device used for presenting a change condition of the voltage difference. According to the battery device provided by the present application, the electrical insulation failure problem of the battery device can be quickly detected, and the detection efficiency is further improved.

Description

Technical Field

[0001] This application relates to the field of batteries, and more specifically, to a battery device and an energy storage device. Background Technology

[0002] Energy storage power stations are generally battery systems composed of battery devices, often operating at high voltages, typically several hundred volts. High-voltage safety protection is a crucial technology for high-voltage battery systems. Under normal conditions, the positive / negative busbars of the battery device have good insulation performance with the device's enclosure. However, during use, issues such as vibration, component aging, moisture, and corrosion can damage the insulation film. In severe cases, this can even cause perforation of the battery enclosure or the aluminum casing of the battery cells, leading to electrical insulation failure and endangering the personal safety of operators. For example, in extreme cases where a ground fault occurs in the battery device, the connected energy storage converter may also be damaged or even catch fire. Therefore, detecting electrical insulation failures in such high-voltage battery systems is of great importance.

[0003] Currently, the industry typically uses instruments or circuit monitoring to detect electrical insulation failures in battery devices. However, these methods are inefficient in practice and cannot quickly detect electrical insulation failures in battery devices.

[0004] Therefore, this application aims to provide a battery device that can quickly detect electrical insulation failure in the battery device and improve detection efficiency. Summary of the Invention

[0005] This application provides a battery device that can quickly detect electrical insulation failure in the battery device, thereby further improving detection efficiency.

[0006] In a first aspect, a battery device is provided, comprising: a battery body including a positive electrode and a negative electrode; a housing including a metal portion for housing the battery body, wherein an insulating material is disposed between the housing and the battery body; a detection device including a first port and a second port, wherein the first port is connected to the positive electrode and the second port is connected to the metal portion; or, the first port is connected to the negative electrode and the second port is connected to the metal portion, wherein the detection device is used to detect the voltage difference between the first port and the second port; and a presentation device for presenting changes in the voltage difference.

[0007] The battery device provided in this application can quickly detect electrical insulation failure in the battery device, thereby further improving detection efficiency.

[0008] It should be understood that the positive electrode of the battery body can be understood as the combination of the positive electrodes of multiple battery cells, and the negative electrode of the battery body can be understood as the combination of the negative electrodes of multiple battery cells.

[0009] It should be noted that the insulating material is an insulating film covering the outside of the battery body.

[0010] Optionally, in one possible implementation, the detection device may be an electrophoresis device, which includes electrophoretic particles, and the presentation device includes a display panel. When the electrophoresis device detects that the voltage difference between the first port and the second port is greater than or equal to a first threshold, the electrophoretic particles move under the action of the voltage difference, and the movement of the electrophoretic particles can be presented on the display panel.

[0011] In this application, the first port of the electrophoresis device is connected to the positive electrode of the battery body via a wire, and the second port of the electrophoresis device is connected to the metal part of the casing via a wire; or, the first port of the electrophoresis device is connected to the negative electrode of the battery body via a wire, and the second port of the electrophoresis device is connected to the metal part of the casing via a wire.

[0012] Optionally, in one possible implementation, the display device may be an indicator light that illuminates when the indicator light device detects that the voltage difference between the first port and the second port is greater than or equal to a first threshold.

[0013] Specifically, the first port of the indicator light device is connected to the positive terminal of the battery body via a wire, and the second port of the indicator light device is connected to the metal part of the casing via a wire; or, the first port of the indicator light device is connected to the negative terminal of the battery body via a wire, and the second port of the indicator light device is connected to the metal part of the casing via a wire.

[0014] Alternatively, in one possible implementation, the presentation device may be a buzzer that sounds when it detects that the voltage difference between the first port and the second port is greater than or equal to a first threshold.

[0015] Specifically, the first port of the buzzer is connected to the positive terminal of the battery body via a wire, and the second port of the buzzer is connected to the metal part of the casing via a wire; or, the first port of the buzzer is connected to the negative terminal of the battery body via a wire, and the second port of the buzzer is connected to the metal part of the casing.

[0016] In conjunction with the first aspect, in some implementations of the first aspect, the detection device includes electrophoretic particles, and the presentation device includes a display panel. When the voltage difference is greater than or equal to a first threshold, the electrophoretic particles move under the influence of the voltage difference, and the movement of the electrophoretic particles is displayed on the display panel. According to the battery device provided in this application, electrical insulation failure problems in the battery device can be detected quickly, further improving detection efficiency.

[0017] In conjunction with the first aspect, in some implementations of the first aspect, the display panel includes a first identifier, and when the voltage difference is greater than or equal to the first threshold, the electrophoretic particles move to the position corresponding to the first identifier. The battery device provided by this application can quickly detect electrical insulation failure in the battery device, further improving detection efficiency.

[0018] In conjunction with the first aspect, in some implementations of the first aspect, the display panel further includes a second identifier, wherein when the voltage difference is less than the first threshold, the electrophoretic particle is located at the position corresponding to the second identifier. The battery device provided by this application can quickly detect electrical insulation failure in the battery device, further improving detection efficiency.

[0019] In conjunction with the first aspect, in some implementations of the first aspect, the first identifier is located at one end of the display panel, and the second identifier is located at the other end of the display panel. The battery device provided by this application can quickly detect electrical insulation failure in the battery device, further improving detection efficiency.

[0020] In conjunction with the first aspect, in some implementations of the first aspect, the first identifier is located at both ends of the display panel, and the second identifier is located in the middle of the display panel. The battery device provided by this application can quickly detect electrical insulation failure in the battery device, further improving detection efficiency.

[0021] In conjunction with the first aspect, in some implementations of the first aspect, the electrophoretic particle comprises a monochromatic charged particle with the same polarity.

[0022] In conjunction with the first aspect, in some implementations of the first aspect, the electrophoretic particles comprise two types of charged particles with opposite polarities and different colors. According to the battery device provided in this application, electrical insulation failure in the battery device can be detected quickly, further improving detection efficiency.

[0023] In conjunction with the first aspect, in some implementations of the first aspect, the presentation device includes an indicator light that illuminates when the voltage difference is greater than or equal to a first threshold. The battery device provided by this application can quickly detect electrical insulation failure in the battery device, further improving detection efficiency.

[0024] In conjunction with the first aspect, in some implementations of the first aspect, the presenting device includes a buzzer that sounds when the voltage difference is greater than or equal to a first threshold. According to the battery device provided in this application, electrical insulation failure in the battery device can be detected quickly, further improving detection efficiency.

[0025] In conjunction with the first aspect, in some implementations of the first aspect, the presentation device is fixed to the outer surface of the housing. According to the battery device provided in this application, electrical insulation failure in the battery device can be detected quickly, further improving detection efficiency.

[0026] In a second aspect, an energy storage device is provided, characterized in that it includes a battery device as described in the first aspect and certain implementations thereof, for receiving external charging or discharging externally.

[0027] It should be noted that the energy storage device can be an energy storage power station, a large-scale stationary energy storage device, etc. Attached Figure Description

[0028] Figure 1 This is a schematic structural diagram of a battery device 100 provided in an embodiment of this application.

[0029] Figure 2 yes Figure 1 An exploded view of a battery device is shown.

[0030] Figure 3 This is a schematic structural diagram of a battery device 300 provided in an embodiment of this application.

[0031] Figure 4 This is a schematic structural diagram of an electrophoresis apparatus 400 provided in an embodiment of this application.

[0032] Figure 5 This is a schematic structural diagram of an electrophoresis apparatus 500 provided in an embodiment of this application.

[0033] Figure 6 This is a schematic structural diagram of an electrophoresis apparatus 600 provided in an embodiment of this application.

[0034] Figure label:

[0035] 100-Battery assembly; 110-Battery body; 120-Battery cell; 130-Casing; 1311-Large surface of battery cell; 1312-Side surface of battery cell; 1313-Small surface of battery cell; 1314-Electrode terminal; 1321-Casing body; 1322-Cover plate; 1323-Side plate; 1324-End plate; 300-Battery assembly; 310-Detection device; 320-Presentation device; 400-Electrophoresis device; 410-First substrate; 420-Second substrate; 430-Separation wall; 440-Display panel; 450-First electrode; 460-Second electrode; 500-Electrophoresis device; 510-Capillary tube; 520-Display panel; 600-Electrophoresis device. Detailed Implementation

[0036] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0037] Figure 1 This is a schematic structural diagram of a battery device 100 provided in an embodiment of this application.

[0038] like Figure 1 As shown, the battery device 100 includes a battery body 110, which may include a plurality of battery cells 120. The plurality of battery cells 120 are used to convert chemical energy into electrical energy.

[0039] The battery cell 120 may include an electrode assembly, an electrolyte, and a cell casing. The electrode assembly and electrolyte can be housed within the cell casing. The electrode assembly may include a positive electrode, a negative electrode, and a separator. The positive and negative electrodes can intercalate and deintercalate metal ions (such as lithium ions) to achieve energy storage and release. The positive and negative electrodes are the main energy storage components of the battery cell 120, reflecting its energy density, cycle performance, and safety performance. A separator may be filled between the spaced-apart positive and negative electrodes. The separator is permeable to metal ions but is itself non-conductive, thus separating the positive and negative electrodes to prevent short circuits. The electrolyte can serve as a transport carrier for metal ions between the positive and negative electrodes.

[0040] The battery cell 120 can be, but is not limited to, rechargeable batteries such as lithium polymer batteries, lithium-ion batteries, lead-acid batteries, nickel-cadmium batteries, and nickel-metal hydride batteries. The shape of the battery cell 120 can be, for example, strip-shaped or plate-shaped. In one embodiment, multiple battery cells 120 in the battery module 200 can be of the same type. Figure 2 The number of multiple battery cells 120 shown may be illustrative. It should be understood that this application does not specifically limit the number of battery cells 120 in the battery device 100.

[0041] It should be noted that the battery device can also be called a battery pack or battery stack, and it should be understood that the embodiments of this application are not limited in this respect. For ease of understanding, the term "battery device" will be used consistently in the following description.

[0042] In one possible implementation, the battery device 100 may also include other components, such as a busbar, a battery management system (BMS) control module, and a thermal management component (not shown in the figure).

[0043] The current collector can combine the positive currents of multiple battery cells 120 to form the positive current of the battery device 100; the current collector can also combine the negative currents of multiple battery cells 120 to form the negative current of the battery device 100. In other words, the current collector can combine the positive currents of multiple battery cells 120 into the positive current of the battery device 100, and combine the negative currents of multiple battery cells 120 into the negative current of the battery device 100.

[0044] The BMS control module is used to control the operating status of multiple battery cells 120. For example, when a fault is detected in a battery cell 120, the BMS control module can disconnect the faulty battery cell 120, which allows other battery cells 120 to operate normally.

[0045] A thermal management component can be used to dissipate heat generated by the battery device 100 to the outside of the battery device 100, thereby facilitating the normal operation of the battery device 100 at a relatively suitable temperature. The thermal management component may contain a cooling medium. The cooling medium can flow into and out of the battery device 100 through the thermal management component, thereby removing the heat generated by the battery device 100. In some embodiments, the cooling medium may be air, or other cooling media, such as an inert gas or an insulating liquid, etc., and this application embodiment is not limited to this.

[0046] Figure 2 yes Figure 1 An exploded view of a battery device is shown.

[0047] Multiple battery cells 120 can be stacked. For example, as Figure 2 As shown, the large surfaces 1311 (which can refer to the surface with the largest area of ​​the cell 120) of two adjacent cells 120 can be arranged facing each other, and electrode terminals 1314 can be arranged on the side surface 1312 (which can refer to the surface with a medium area of ​​the cell 120). Similarly, the side surfaces 1312 of two adjacent cells 120 can be arranged facing each other. Electrode terminals 1314 can be arranged on the small surface 1313 (which can refer to the surface with the smallest area of ​​the cell 120).

[0048] The positive terminal can conduct electricity with the positive electrode plate. The negative terminal can conduct electricity with the negative electrode plate.

[0049] The battery device 100 may also include a housing 130 for accommodating the battery body 110.

[0050] Specifically, the housing 130 may include a housing body 1321 and a cover plate 1322. The cover plate 1322 may, for example, cover and connect to the opening of the housing body 1321. In one embodiment, the housing body 1321 may include two oppositely arranged side plates 1323 and two oppositely arranged end plates 1324. Each side plate 1323 is connected to the two end plates 1324. Each end plate 1324 is connected to the two side plates 1323. Each side plate 1323 and the two end plates 1324 may be fixed, for example, by welding or riveting. The side plates 1323 and end plates 1324 can fix and protect the battery body 110.

[0051] It should be noted that while the casing 130 itself is made of metal, the presence of an insulating film between the casing 130 and the battery cell 120 provides the battery device 100 with excellent electrical insulation characteristics. However, in actual production, during installation and use, the introduction of foreign metal objects or damage to the insulating film can cause a short circuit between the battery cell 120 casing and the casing 130, leading to electrical insulation failure. In severe cases, this can even cause perforation of the casing 130 or the battery cell 120 casing, resulting in safety issues.

[0052] Currently, the industry typically uses instruments or circuit monitoring to test battery devices in order to determine whether electrical insulation failure has occurred. However, these methods require testing each battery device individually, which results in low efficiency and an inability to quickly detect electrical insulation failures.

[0053] Therefore, the present application aims to provide a battery device that can quickly detect electrical insulation failures in battery devices and improve detection efficiency.

[0054] The battery device provided in this application will be described in detail below.

[0055] Figure 3 This is a schematic structural diagram of a battery device 300 provided in an embodiment of this application.

[0056] like Figure 3 As shown, the battery device 300 includes a battery body 110, a housing 130, a detection device 310, and a presentation device 320. The detection device 310 and the presentation device 320 can be fixed to the housing 130 by mechanical connection.

[0057] Specifically, the battery body 110 includes a positive electrode and a negative electrode, and the housing 130, including a metal portion, is used to house the battery body 110. An insulating material is disposed between the housing 130 and the battery body 110. The detection device 310 includes a first port and a second port, and the detection device 310 is used to detect the voltage difference between the first port and the second port. The presentation device 320 is used to present the changes in the voltage difference detected by the detection device 310.

[0058] Optionally, in one possible implementation, the first port is connected to the positive terminal of the battery body 110, and the second port is connected to the metal portion of the housing 130. In this case, it can be assumed that the voltage (potential) of the housing 130 after an electrical insulation failure is less than the voltage (potential) at the positive terminal of the battery body 110.

[0059] Optionally, in one possible implementation, the first port is connected to the negative terminal of the battery body 110, and the second port is connected to the metal part of the housing 130. In this case, it can be assumed that the voltage (potential) of the housing 130 after electrical insulation failure is greater than the voltage (potential) at the negative terminal of the battery body 110.

[0060] It should be noted that, as mentioned earlier, the positive electrode of the battery body 110 can be understood as the combination of the positive electrodes of multiple cells 120, and therefore can also be called the total positive electrode. Similarly, the negative electrode of the battery body 110 can be understood as the combination of the negative electrodes of multiple cells 120, and therefore can also be called the total negative electrode. For ease of understanding, in the following description, "positive electrode" and "negative electrode" will be used consistently instead of "total positive electrode" and "total negative electrode".

[0061] It should also be noted that the detection device 310 and the presentation device 320 can be an integrated device or a device fixed together by means of mechanical structure (e.g., wire connection, threaded connection, etc.). It should be understood that the embodiments of this application do not limit this.

[0062] Optionally, in one possible implementation, the presentation device 320 can be fixed to the outer surface of the housing 130 by any of the following connection methods: for example, it can be fixed to the outer surface of the housing 130 by screw connection, or it can be fixed to the outer surface of the housing 130 by welding connection, or it can be fixed to the outer surface of the housing 130 by adhesive connection. It should be understood that the embodiments of this application are not limited herein.

[0063] Optionally, in one possible implementation, the detection device 310 can also be fixed to the outer surface of the housing 130 by any of the following connection methods: for example, it can be fixed to the outer surface of the housing 130 by screw connection, or it can be fixed to the outer surface of the housing 130 by welding connection, or it can be fixed to the outer surface of the housing 130 by adhesive connection. It should be understood that the embodiments of this application are not limited here.

[0064] The outer surface of the housing 130 may include the housing body 1321 (including side panels 1323 and end panels 1324) and the cover 1322. The presentation device 320 may be fixed to the side panel 1323 of the housing 130, or to the end panel 1324 of the housing 130, or to the cover 1322.

[0065] It should be understood that the embodiments of this application do not limit the specific fixed positions of the presentation device 320 and the detection position 310 on the outer surface of the housing 130.

[0066] Alternatively, in one possible implementation, the insulating material may be an insulating film covering the outside of the battery body 110.

[0067] Specifically, the insulating film can also be wrapped around the outside of the battery cell 120 included in the battery body 110, so as to insulate between the battery body 110 and the housing 130, and further, to give the battery device 100 good electrical insulation characteristics.

[0068] It should be noted that the insulating film can also be called an insulating layer, etc., and it should be understood that the embodiments of this application do not limit this.

[0069] Optionally, in one possible implementation, the detection device 310 can be an electrophoresis device. This electrophoresis device includes electrophoretic particles, and the presentation device 320 includes a display panel. When the electrophoresis device detects that the voltage difference between the first port and the second port is greater than or equal to a first threshold, the electrophoretic particles can move under the influence of the voltage difference, and the movement of the electrophoretic particles is displayed on the display panel. At this time, electrophoretic particles with a driving voltage equal to the first threshold can be selected. For example, if the first threshold is set to 6V, then when selecting electrophoretic particles, electrophoretic particles with a driving voltage of 6V are selected.

[0070] Figure 4 This is a schematic structural diagram of an electrophoresis apparatus 400 provided in an embodiment of this application. It should be noted that the detection device 320 described above can, under certain circumstances, be the electrophoresis apparatus 400; that is, the electrophoresis apparatus 400 can be located in... Figure 3 The outer surface of the box 130 shown.

[0071] like Figure 4 As shown, the electrophoresis apparatus 400 includes a first substrate 410, a second substrate 420 disposed on the display side, and a display panel 440.

[0072] Specifically, there is a predetermined interval between the first substrate 410 and the second substrate 420, and a dispersion liquid (not shown in the figure) is filled in a sealed container formed by the first substrate 410, the second substrate 420, and the isolation wall 430. Electrophoretic particles (not shown in the figure) are distributed in the dispersion liquid, and a first electrode 450 and a second electrode 460 are disposed along the side surface of the isolation wall 430. The first electrode 450 is connected to the first port of the electrophoresis apparatus 400, and the second electrode 460 is connected to the second port of the electrophoresis apparatus 400.

[0073] In this application, the first port of the electrophoresis device 400 is connected to the positive electrode of the battery body 110 via a wire, and the second port of the electrophoresis device 400 is connected to the metal part of the housing 130 via a wire; alternatively, the first port of the electrophoresis device 400 is connected to the negative electrode of the battery body 110 via a wire, and the second port of the electrophoresis device 400 is connected to the metal part of the housing 130 via a wire.

[0074] Specifically, when the electrophoresis device 400 detects that the voltage difference between the first port and the second port is greater than or equal to the first threshold, assuming that the first threshold is set to 6V, the following example illustrates this by taking the driving voltage of the selected electrophoretic particles as 6V.

[0075] For example, when the voltage difference changes from "0V" to "6.4V", the voltage difference is greater than the first threshold. Since the driving voltage of the selected electrophoretic particles is 6V, i.e., the voltage difference is greater than the driving voltage of the electrophoretic particles, the electrophoretic particles respond to the electric field applied to the first electrode 450 and the second electrode 460. That is, under the action of the voltage difference between the first electrode 450 and the second electrode 460, the electrophoretic particles move in the sealed container, and this movement is displayed on the display panel 440 of the electrophoresis apparatus 400. At this time, the observer can observe the movement of the electrophoretic particles through the display panel 440, and thus determine that the battery device has experienced an electrical insulation failure.

[0076] Alternatively, in one possible implementation, such as Figure 4 As shown, the display panel 440 includes a first identifier, and when the voltage difference is greater than or equal to a first threshold, the electrophoretic particles move to the position corresponding to the first identifier.

[0077] Specifically, the first identifier can be a scale value identifier. When the electrophoresis device detects a change in the voltage difference between the first port and the second port, for example, when the voltage difference changes from "0V" to "6.4V", the voltage difference is greater than the first threshold and greater than the driving voltage of the electrophoretic particles. At this time, the electrophoretic particles move to the position corresponding to the first identifier under the action of the voltage difference.

[0078] Alternatively, in one possible implementation, such as Figure 4 As shown, the display device also includes a second identifier, and when the voltage difference is less than the first threshold, the electrophoretic particles are located at the position corresponding to the second identifier.

[0079] Specifically, the second identifier can be a scale value identifier. When the electrophoresis device detects that the voltage difference between the first port and the second port is always "0V", the electrophoretic particles are located at the position corresponding to the second identifier.

[0080] However, when the electrophoresis device detects that the voltage difference between the first port and the second port is greater than or equal to the first threshold, for example, when the voltage difference changes from "0V" to "6.4V", the voltage difference is greater than the first threshold, that is, the voltage difference is greater than the driving voltage of the electrophoretic particles. Then, the electrophoretic particles move from the position corresponding to the second marker to the position corresponding to the first marker under the action of the voltage difference.

[0081] Alternatively, in one possible implementation, the first identifier is located at one end of the display panel, and the second identifier is located at the other end of the display panel.

[0082] Alternatively, in one possible implementation, the first identifier is located at both ends of the display panel, and the second identifier is located in the middle of the display panel.

[0083] It should be noted that the specific value of the first threshold can be determined according to actual circumstances such as specific safety specifications. It should be understood that the embodiments of this application do not impose any restrictions on this.

[0084] It should also be noted that since different types of electrophoretic particles have different driving voltages, when selecting electrophoretic particles, it is necessary to determine which charged particle to use as the electrophoretic particle based on the size of the set first threshold.

[0085] For example, when it is determined that the battery device has experienced an electrical insulation failure, and the minimum voltage difference between the first and second ports of the battery device is 3.2V, then a first threshold of 3.2V can be set according to specific safety specifications. Therefore, when selecting electrophoretic particles, electrophoretic particles with a driving voltage equal to 3.2V should also be selected. This can be understood as follows: as long as the voltage difference acting on the electrophoretic particle is greater than or equal to 3.2V, the electrophoretic particle can move.

[0086] Furthermore, since the voltage difference of the battery device may fluctuate slightly during practical applications, when selecting the type of electrophoretic particles, it is necessary to ensure that these particles will not move under slight voltage difference variations. The particles will only move when the voltage difference reaches a certain threshold, for example, when the voltage difference reaches the driving voltage of the electrophoretic particles. It should be understood that the selection of the type of electrophoretic particles can be made based on the specific application scenario, and this application does not impose any restrictions.

[0087] Alternatively, in one possible implementation, the electrophoretic particle comprises a monochromatic charged particle with the same polarity.

[0088] Combination Figure 5 The electrophoretic particles are described in terms of a single monochromatic charged particle with the same polarity. Figure 5 This is a schematic structural diagram of an electrophoresis apparatus 500 provided in an embodiment of this application.

[0089] For details, see Figure 5 The electrophoresis apparatus 500 also includes a capillary 510, which is installed at a horizontal angle inside a sealed container. The monochromatic charged particles and their dispersion are encapsulated together in the electrophoresis apparatus 500. The display panel 520 of the electrophoresis apparatus 500 is a transparent panel so as to observe the movement and changes of the monochromatic charged particles.

[0090] For example, consider monochromatic charged particles as positively charged particles. The first port of the electrophoresis device 500 is connected to the positive electrode of the battery device 300 via a wire, and the second port is connected to the housing 130 via a wire. Figure 5 As shown in (a), when there is no voltage difference between the first and second ports (the voltage difference is 0), that is, when the battery device has not experienced electrical insulation failure, the monochromatic charged particles are fixedly suspended on the left side of the sealed container. Figure 5 The initial position shown in (a).

[0091] However, when the battery device experiences electrical insulation failure, i.e., when the voltage difference between the first and second ports is greater than or equal to a first threshold (for example, assuming the first threshold is set to 6V, and the voltage difference changes from "0V" to "6.4V"), the voltage difference is greater than the first threshold. Furthermore, since the driving voltage of the selected monochromatic charged particles is also 6V, meaning the voltage difference is greater than the driving voltage of the monochromatic electrophoretic particles, the monochromatic charged particles, under the influence of the voltage difference between the first and second ports of the electrophoresis device 500, move along the capillary 510 towards the electrode with the opposite charge. Figure 5 As shown in (b), monochromatic charged particles migrate from the initial position to the target position along the capillary 510.

[0092] Therefore, the observer can observe the color shift displayed on the display panel 520, that is, the observer can observe the color display of monochromatic charged particles at the position of the second electrode 460 (which can be understood as the negative electrode). Then the observer can assume that the monochromatic charged particles have moved from the initial position to the target position under the action of the electric field, and thus the observer can judge that the battery device has experienced electrical insulation failure.

[0093] Optionally, in one possible implementation, the initial position can be the position corresponding to the second identifier on the display panel 520, and the target position can be the position corresponding to the first identifier on the display panel 520. For example... Figure 5 As shown, the first identifier is located at one end of the display panel 520, and the second identifier is located at the other end of the display panel 520.

[0094] For example, the first and second identifiers can be scale values. When there is no voltage difference between the first and second ports of the electrophoresis device, i.e., the voltage difference is "0V", the monochromatic charged particles are located at the position corresponding to the second identifier (i.e., the initial position). When the voltage difference between the first and second ports of the electrophoresis device is greater than or equal to a first threshold, for example, when the voltage difference changes from "0V" to "6.4V", i.e., when the voltage difference is greater than the set first threshold (driving voltage), the monochromatic charged particles move from the position corresponding to the second identifier (initial position) to the position corresponding to the first identifier (target position).

[0095] It should be understood that the first and second identifiers can also be color identifiers, number identifiers, text identifiers, etc., and the embodiments of this application do not limit this.

[0096] It should be noted that the monochromatic charged particles can be particles of the same kind, or two or more different kinds of particles with the same polarity. It should be understood that the embodiments of this application do not impose any restrictions on this.

[0097] It should also be noted that the specific value of the first threshold can be determined according to the actual situation such as specific safety specifications. It should be understood that the embodiments of this application do not impose any restrictions on this.

[0098] It should also be noted that since different types of electrophoretic particles (monochromatic charged particles) have different driving voltages, when selecting electrophoretic particles (monochromatic charged particles), it is necessary to determine which charged particle to use as the electrophoretic particle based on the size of the set first threshold.

[0099] For example, when it is determined that the battery device has experienced an electrical insulation failure, and the minimum voltage difference between the first and second ports of the battery device is 3.2V, then a first threshold of 3.2V can be set according to specific safety specifications. Therefore, when selecting electrophoretic particles, electrophoretic particles with a driving voltage equal to 3.2V should also be selected. This can be understood as follows: as long as the voltage difference acting on the electrophoretic particle is greater than or equal to 3.2V, the electrophoretic particle can move.

[0100] Furthermore, since the voltage difference of the battery device may fluctuate slightly during practical applications, when selecting the type of electrophoretic particles, it is necessary to ensure that these particles will not move under slight voltage difference variations. The particles will only move when the voltage difference reaches a certain threshold, for example, when the voltage difference reaches the driving voltage of the electrophoretic particles. It should be understood that the selection of the type of electrophoretic particles can be made based on the specific application scenario, and this application does not impose any restrictions.

[0101] In this application, the length of the capillary can range from 1 to 10 cm, and the diameter can range from 2 to 5 mm. It should be understood that the specific dimensions of the capillary are only illustrative examples, and the embodiments of this application are not limited here.

[0102] It should also be noted that the dispersion mentioned above can also be called an electrophoresis medium, electrophoresis solution, etc., and it should be understood that the embodiments of this application do not limit this.

[0103] Alternatively, in one possible implementation, the electrophoretic particles comprise two charged particles with opposite polarities and different colors.

[0104] Combination Figure 6 The electrophoretic particles are illustrated by the example of two types of charged particles with opposite polarities and different colors. Figure 6 This is a schematic structural diagram of an electrophoresis apparatus 600 provided in an embodiment of this application.

[0105] exist Figure 6 In the electrophoresis apparatus 600, the two-color charged particles and their dispersion are encapsulated together. The display panel 520 of the electrophoresis apparatus 600 is set as a transparent panel so as to observe the movement of the two-color charged particles.

[0106] Taking dual-color charged particles as an example, which consist of two types of charged particles with opposite polarities and different colors. Specifically, two types of charged particles with opposite polarities and different colors are encapsulated within a microcapsule. Under the influence of an external electric field, these two types of charged particles undergo electrophoretic migration in opposite directions to achieve the display.

[0107] For example, the first port of the electrophoresis device 600 is connected to the positive electrode of the battery device 300 via a wire, and the second port is connected to the housing 130 via a wire. Figure 6 As shown in (a), when there is no voltage difference between the first and second ports (the voltage difference is 0), that is, when the battery device has not experienced electrical insulation failure, the two charged particles of different colors are fixedly suspended in the middle of the sealed container. Figure 6 The initial position shown in (a).

[0108] However, when the battery device experiences electrical insulation failure, i.e., when the voltage difference between the first and second ports is greater than or equal to a first threshold (for example, assuming the first threshold is set to 6V, and the voltage difference changes from "0V" to "6.4V"), the voltage difference is greater than the first threshold. Furthermore, since the driving voltage for both selected electrophoretic particles is 6V, meaning the voltage difference is greater than the driving voltage for these two electrophoretic particles, under the influence of the electric field applied to the electrophoresis device, the two charged particles of different colors, due to their opposite polarities, each move along the capillary 510 towards the electrode with the opposite polarity to their own charge.

[0109] like Figure 6 As shown in (b). For example, among two different colored charged particles, the negatively charged particles move along the capillary 510 towards the position of the first electrode 450 connected to the first port (at this time, the first electrode can be understood as the positive electrode). Among two different colored charged particles, the positively charged particles move along the capillary 510 towards the position of the second electrode 460 connected to the second port (the second electrode can be understood as the negative electrode).

[0110] Therefore, by observing the color shift displayed on the display panel 520, that is, by observing different color displays at the positions of the first electrode 450 and the second electrode 460 respectively, the observer can conclude that the charged particles of two different colors have moved from the initial position to the target position under the action of the electric field, and thus determine that the battery device has an electrical insulation failure problem.

[0111] It needs to be explained that, Figure 6 The initial position shown can be the position corresponding to the second identifier on the display panel, and the target position can be the position corresponding to the first identifier on the display panel. For example... Figure 6 As shown, the first identifier is located at both ends of the display panel 520, and the second identifier is located in the middle of the display panel.

[0112] For example, the first and second identifiers can be scale values. When there is no voltage difference between the first and second ports of the electrophoresis device, i.e., the voltage difference is "0V", the two types of charged particles are located at the position corresponding to the second identifier (i.e., the initial position). When the voltage difference between the first and second ports of the electrophoresis device is greater than or equal to a first threshold, for example, when the voltage difference changes from "0V" to "6.4V", i.e., when the voltage difference is greater than the set first threshold (driving voltage), the two types of electrophoretic particles move from the position corresponding to the second identifier (initial position) to the position corresponding to the first identifier (target position).

[0113] It should be understood that the first and second identifiers can also be color identifiers, number identifiers, text identifiers, etc., and the embodiments of this application do not limit this.

[0114] It should be noted that the specific value of the first threshold can be determined according to actual circumstances such as specific safety specifications. It should be understood that the embodiments of this application do not impose any restrictions on this.

[0115] It should also be noted that since different types of electrophoretic particles have different driving voltages, when selecting electrophoretic particles, it is necessary to determine which charged particle to use as the electrophoretic particle based on the size of the set first threshold.

[0116] For example, when it is determined that the battery device has experienced electrical insulation failure, and the minimum voltage difference between the first and second ports of the battery device is 3.2V, then, according to specific safety specifications, the first threshold can be set to 3.2V. Therefore, when selecting electrophoretic particles, electrophoretic particles with a driving voltage equal to 3.2V should also be selected. This can be understood as follows: as long as the voltage difference acting on the electrophoretic particle is greater than or equal to 3.2V, the electrophoretic particle can move.

[0117] Furthermore, since the voltage difference of the battery device may fluctuate slightly during practical applications, when selecting the type of electrophoretic particles, it is necessary to ensure that these particles will not move under slight voltage difference variations. The particles will only move when the voltage difference reaches a certain threshold, for example, when the voltage difference reaches the driving voltage of the electrophoretic particles. It should be understood that the selection of the type of electrophoretic particles can be made based on the specific application scenario, and this application does not impose any restrictions.

[0118] It should also be noted that the specific range of the first threshold can be determined according to the specific circumstances of the actual application. It should be understood that the embodiments of this application do not impose any restrictions on this.

[0119] In this application, the length of the capillary can range from 1 to 10 cm, and the diameter can range from 2 to 5 mm. It should be understood that the specific dimensions of the capillary are only illustrative examples, and the embodiments of this application are not limited here.

[0120] It should also be noted that the dispersion mentioned above can also be called an electrophoresis medium, electrophoresis solution, etc., and it should be understood that the embodiments of this application do not limit this.

[0121] Optionally, in one possible implementation, the detection device 310 can be an indicator light device, and the display device 320 can be an indicator light. When the indicator light device detects that the voltage difference between the first port and the second port is greater than or equal to a first threshold, the indicator light illuminates. At this time, an indicator light with a rated voltage value of the first threshold can be selected. Depending on the specific situation, if the first threshold is set to 6.4V, an indicator light with a rated voltage value of 6.4V can be selected.

[0122] Specifically, the first port of the indicator light device is connected to the positive terminal of the battery body 110 via a wire, and the second port of the indicator light device is connected to the metal part of the housing 130 via a wire; or, the first port of the indicator light device is connected to the negative terminal of the battery body 110 via a wire, and the second port of the indicator light device is connected to the metal part of the housing 130 via a wire.

[0123] Furthermore, when the indicator light device detects a voltage difference between the first and second ports that is greater than or equal to a first threshold, for example, a change in voltage difference from "0V" to "6.4V", the voltage difference equals the first threshold, meaning it equals the rated voltage of the indicator light device. This implies that current will flow through the circuit containing the indicator light device, and the voltage will reach the rated voltage of the indicator light, causing the indicator light to illuminate. At this point, an observer sees the indicator light illuminate, thus determining that the battery device has experienced an electrical insulation failure.

[0124] It should be noted that the indicator light can be a light emitting diode (LED) lamp. It should be understood that the embodiments of this application do not limit the type and color of the indicator light.

[0125] Furthermore, since the voltage difference of the battery device may fluctuate slightly during actual application, when selecting the type of indicator light, we need to ensure that the indicator light will not light up under slight voltage difference fluctuations, and will only light up when the voltage difference reaches a certain threshold, for example, when the voltage difference reaches the rated voltage of the indicator light. It should be understood that the type of indicator light can be selected according to the specific application scenario, and this application does not impose any restrictions.

[0126] It should also be noted that the specific value of the first threshold can be determined according to the actual situation such as specific safety specifications. It should be understood that the embodiments of this application do not impose any restrictions on this.

[0127] Optionally, in one possible implementation, the detection device 310 can be a buzzer, and the presentation device 320 can be a buzzer. When the buzzer detects that the voltage difference between the first port and the second port is greater than or equal to a first threshold, the buzzer sounds. At this time, a buzzer with a rated voltage value of the first threshold can be selected. Depending on the specific situation, if the first threshold is set to 6.4V, a buzzer with a rated voltage value of 6.4V can be selected.

[0128] Specifically, the first port of the buzzer is connected to the positive terminal of the battery body 110 via a wire, and the second port of the buzzer is connected to the metal part of the housing 130 via a wire; or, the first port of the buzzer is connected to the negative terminal of the battery body 110 via a wire, and the second port of the buzzer is connected to the metal part of the housing 130.

[0129] For example, when the buzzer detects that the voltage difference between the first port and the second port is greater than or equal to a first threshold, for instance, when the voltage difference changes from "0V" to "6.4V", the voltage difference equals the first threshold, that is, the voltage difference equals the buzzer's rated voltage. This can be understood as the battery device being able to supply power to the buzzer. The control unit in the buzzer then controls the buzzer's oscillator to vibrate, causing the buzzer to sound. At this point, an observer hears the buzzer's sound and thus determines that the battery device has experienced an electrical insulation failure.

[0130] Furthermore, since the voltage difference of the battery device may fluctuate slightly during actual application, when selecting the type of buzzer, we need to ensure that the buzzer will not sound under slight voltage fluctuations, but only when the voltage difference reaches a certain threshold, for example, when the voltage difference reaches the buzzer's rated voltage. It should be understood that the type of buzzer can be selected based on the specific application scenario, and this application does not impose any restrictions.

[0131] It should also be noted that the specific value of the first threshold can be determined according to the actual situation such as specific safety specifications. It should be understood that the embodiments of this application do not impose any restrictions on this.

[0132] It should be noted that the buzzer device can be an electromagnetic buzzer or a piezoelectric buzzer, etc. It should be understood that the embodiments of this application do not limit this.

[0133] Alternatively, in one possible implementation, the detection device 310 may be a voltmeter, and the presentation device 320 may be a display screen. When the voltmeter detects a change in the voltage difference between the first port and the second port, the display screen of the voltmeter displays the specific voltage value.

[0134] Specifically, the first port of the voltmeter is connected to the positive terminal of the battery body 110 via a wire, and the second port of the voltmeter is connected to the metal part of the housing 130 via a wire; or, the first port of the voltmeter is connected to the negative terminal of the battery body 110 via a wire, and the second port of the voltmeter is connected to the metal part of the housing 130 via a wire.

[0135] Furthermore, when the voltmeter detects a change in the voltage difference between the first and second ports, for example, a change from "0V" to "6.4V", the voltmeter display shows the specific voltage value. Thus, by observing the voltage value on the voltmeter, the observer can determine that the battery device has experienced an electrical insulation failure.

[0136] It should be noted that the voltage difference of the battery device may vary slightly during actual use. Therefore, we need to observe the specific voltage value displayed on the voltmeter. Only when the voltage difference reaches a certain threshold can we determine that the battery device has experienced electrical insulation failure.

[0137] It should be noted that the detection device and the presentation device are not limited to the examples described in this application. Any device that can detect the voltage change between the first port and the second port, and that allows an observer to determine that the battery device has experienced an electrical insulation failure, can be called a detection device and a presentation device.

[0138] The battery device provided according to the embodiments of this application can quickly detect electrical insulation failure problems of the battery device, thereby improving detection efficiency.

[0139] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0140] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0141] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0142] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0143] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0144] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0145] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A battery device, characterized in that, include: The battery body includes a positive electrode and a negative electrode; The housing includes a metal portion for housing the battery body, and an insulating material is provided between the housing and the battery body; A detection device includes a first port and a second port, wherein the first port is connected to the positive electrode and the second port is connected to the metal part; or, the first port is connected to the negative electrode and the second port is connected to the metal part, and the detection device is used to detect the voltage difference between the first port and the second port. A presentation device is used to present the changes in the voltage difference; the presentation device is fixed to the outer surface of the housing. The detection device includes electrophoretic particles, and the presentation device includes a display panel; When the voltage difference is greater than or equal to a first threshold, the electrophoretic particles move under the action of the voltage difference, and the display panel displays the movement of the electrophoretic particles.

2. The apparatus according to claim 1, characterized in that, The display panel includes a first identifier. When the voltage difference is greater than or equal to the first threshold, the electrophoretic particles move to the position corresponding to the first identifier.

3. The apparatus according to claim 2, characterized in that, The display panel also includes a second identifier. When the voltage difference is less than the first threshold, the electrophoretic particles are located at the position corresponding to the second identifier.

4. The apparatus according to claim 3, characterized in that, The first identifier is located at one end of the display panel, and the second identifier is located at the other end of the display panel.

5. The apparatus according to claim 3, characterized in that, The first identifier is located at both ends of the display panel, and the second identifier is located in the middle of the display panel.

6. The apparatus according to any one of claims 1 to 5, characterized in that, The electrophoretic particles include monochromatic charged particles with the same polarity.

7. The apparatus according to any one of claims 1 to 5, characterized in that, The electrophoretic particles include two types of charged particles with opposite polarities and different colors.

8. The apparatus according to any one of claims 1 to 5, characterized in that, The presentation device includes indicator lights. The indicator light illuminates when the voltage difference is greater than or equal to the first threshold.

9. The apparatus according to any one of claims 1 to 5, characterized in that, The presentation device includes a buzzer. When the voltage difference is greater than or equal to the first threshold, the buzzer sounds.

10. An energy storage device, characterized in that, It includes one or more battery devices as described in any one of claims 1 to 9, for receiving external charging or discharging externally.

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