CN116259870A

CN116259870A - Battery device and energy storage equipment

Info

Publication number: CN116259870A
Application number: CN202310336141.XA
Authority: CN
Inventors: 余鹏; 张峻豪
Original assignee: Huawei Digital Power Technologies Co Ltd
Current assignee: Huawei Digital Power Technologies Co Ltd
Priority date: 2023-03-28
Filing date: 2023-03-28
Publication date: 2023-06-13

Abstract

The embodiment of the application provides a battery device, which comprises: a battery body including a positive electrode and a negative electrode; a case body including a metal portion for accommodating the battery body, an insulating material being provided between the metal portion and the battery body; the detection device comprises 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, the second port is connected with the metal part, and the detection device is used for detecting the voltage difference between the first port and the second port; and the presenting device is used for presenting the change condition of the voltage difference. According to the battery device provided by the application, the problem that the battery device is in electrical insulation failure can be detected rapidly, and the detection efficiency is further improved.

Description

Battery device and energy storage equipment

Technical Field

The embodiment of the application relates to the field of batteries, and more particularly relates to a battery device and an energy storage device.

Background

The energy storage power station is a battery system consisting of battery devices, the voltage is often high, typically hundreds of volts, and high-voltage safety protection is an important technology of the high-voltage battery device system. Under normal conditions, the positive/negative bus of the battery device and the box body of the device have good insulating performance, but in the use process, the insulating film can be damaged due to the problems of vibration, ageing of devices, dampness, corrosion and the like, and the box body or the cell aluminum shell of the battery device can be perforated when serious, so that the battery device is caused to have electrical insulation failure, and the personal safety of operators is influenced. For example, if the battery device is in an extreme case of a ground fault, the energy storage converter connected with the battery device may be damaged or even fire, so in such a high-voltage battery device system, it is of great importance to detect the electrical insulation failure of the battery device.

At present, an instrument or circuit monitoring mode is generally adopted in the industry to detect the electrical insulation failure of the battery device, but the detection efficiency of the method is low in the actual use process, and the problem that the electrical insulation failure of the battery device occurs cannot be detected rapidly.

In view of this, the present application aims to propose a battery device capable of rapidly detecting the occurrence of an electrical insulation failure problem of the battery device, improving detection efficiency.

Disclosure of Invention

The embodiment of the application provides a battery device, which can rapidly detect that the battery device has an electrical insulation failure problem and further improve the detection efficiency.

In a first aspect, there is provided a battery device comprising: a battery body including a positive electrode and a negative electrode; a case including a metal portion for accommodating the battery body, an insulating material being provided between the case and the battery body; the detection device comprises 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, the second port is connected with the metal part, and the detection device is used for detecting the voltage difference between the first port and the second port; and the presenting device is used for presenting the change condition of the voltage difference.

According to the battery device provided by the application, the problem that the battery device is in electrical insulation failure can be detected rapidly, and the detection efficiency is further improved.

It should be understood that the positive electrode of the battery body may be understood as being formed by collecting the positive electrodes of a plurality of electric cells, and the negative electrode of the battery body may be understood as being formed by collecting the negative electrodes of a plurality of electric cells.

The insulating material is an insulating film that covers the outside of the battery body.

Alternatively, in a possible implementation, the detection device may be an electrophoretic device, the electrophoretic device comprises electrophoretic particles, the presentation device comprises a display panel, the electrophoretic particles move under the action of the voltage difference when the electrophoretic device detects that the voltage difference between the first port and the second port is greater than or equal to the first threshold, and the movement of the electrophoretic particles may be presented on the display panel.

In this application, the first port of the electrophoresis apparatus is connected with the positive electrode of the battery body through a wire, and the second port of the electrophoresis apparatus is connected with the metal portion of the case body through a wire, or the first port of the electrophoresis apparatus is connected with the negative electrode of the battery body through a wire, and the second port of the electrophoresis apparatus is connected with the metal portion of the case body through a wire.

Alternatively, in one possible implementation, the presenting means may be an indicator light that lights up when the indicator light means detects that the voltage difference between the first port and the second port is greater than or equal to the first threshold value.

Specifically, the first port of the indicator light device is connected with the positive electrode of the battery body through a wire, the second port of the indicator light device is connected with the metal part of the box body through a wire, or the first port of the indicator light device is connected with the negative electrode of the battery body through a wire, and the second port of the indicator light device is connected with the metal part of the box body through a wire.

Alternatively, in one possible implementation, the presenting means may be a buzzer that buzzes 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 value.

Specifically, the first port of the buzzer is connected with the positive electrode of the battery body through a wire, the second port of the buzzer is connected with the metal part of the box body through a wire, or the first port of the buzzer is connected with the negative electrode of the battery body through a wire, and the second port of the buzzer is connected with the metal part of the box body.

With reference to the first aspect, in certain implementations of the first aspect, the detection device includes an electrophoretic particle, the presentation device includes a display panel, the electrophoretic particle moves under the action of the voltage difference when the voltage difference is greater than or equal to a first threshold, and the movement of the electrophoretic particle is presented on the display panel. According to the battery device provided by the application, the problem that the battery device is in electrical insulation failure can be detected rapidly, and the detection efficiency is further improved.

With reference to the first aspect, in certain implementation manners 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 a position corresponding to the first identifier. According to the battery device provided by the application, the problem that the battery device is in electrical insulation failure can be detected rapidly, and the detection efficiency is further improved.

With reference to the first aspect, in certain implementation manners of the first aspect, the display panel further includes a second identifier, and when the voltage difference is smaller than the first threshold, the electrophoretic particle is located at a position corresponding to the second identifier. According to the battery device provided by the application, the problem that the battery device is in electrical insulation failure can be detected rapidly, and the detection efficiency is further improved.

With reference to the first aspect, in certain 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. According to the battery device provided by the application, the problem that the battery device is in electrical insulation failure can be detected rapidly, and the detection efficiency is further improved.

With reference to the first aspect, in certain implementation manners of the first aspect, the first identifier is located at two ends of the display panel, and the second identifier is located at a middle position of the display panel. According to the battery device provided by the application, the problem that the battery device is in electrical insulation failure can be detected rapidly, and the detection efficiency is further improved.

With reference to the first aspect, in certain implementations of the first aspect, the electrophoretic particles comprise a single-color charged particle of the same polarity.

With reference to the first aspect, in certain implementations of the first aspect, the electrophoretic particles comprise two charged particles of opposite polarity and different colors. According to the battery device provided by the application, the problem that the battery device is in electrical insulation failure can be detected rapidly, and the detection efficiency is further improved.

With reference to the first aspect, in certain implementations of the first aspect, the presenting device includes an indicator light that lights when the voltage difference is greater than or equal to a first threshold. According to the battery device provided by the application, the problem that the battery device is in electrical insulation failure can be detected rapidly, and the detection efficiency is further improved.

With reference to the first aspect, in certain implementations of the first aspect, the presenting device includes a buzzer that buzzes when the voltage difference is greater than or equal to a first threshold. According to the battery device provided by the application, the problem that the battery device is in electrical insulation failure can be detected rapidly, and the detection efficiency is further improved.

With reference to the first aspect, in certain implementations of the first aspect, the presentation device is fixed to an outer surface of the case. According to the battery device provided by the application, the problem that the battery device is in electrical insulation failure can be detected rapidly, and the detection efficiency is further improved.

In a second aspect, there is provided an energy storage device, characterized by comprising a battery arrangement according to the first aspect and certain implementations of the first aspect, for receiving an external charge or discharging to the outside.

The energy storage device can be an energy storage power station, a large-scale fixed energy storage device and the like.

Drawings

Fig. 1 is a schematic configuration diagram of a battery device 100 provided in an embodiment of the present application.

Fig. 2 is an exploded view of one of the battery devices shown in fig. 1.

Fig. 3 is a schematic structural diagram of a battery device 300 provided in an embodiment of the present application.

Fig. 4 is a schematic block diagram of an electrophoresis apparatus 400 according to an embodiment of the present invention.

Fig. 5 is a schematic block diagram of an electrophoresis apparatus 500 according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of an electrophoresis apparatus 600 according to an embodiment of the present invention.

Reference numerals:

a 100-cell device; 110-a battery body; 120-cell; 130-a box body; 1311-large area of the cell; 1312—sides of the cell; 1313-cell facets; 1314-electrode terminals; 1321-a box body; 1322-cover plate; 1323-side panels; 1324-end plates; 300-battery device; 310-detecting means; 320-presentation means; 400-electrophoresis device; 410-a first substrate; 420-a second substrate; 430-dividing wall; 440-display panel; 450-a first electrode; 460-a second electrode; 500-electrophoresis device; 510-capillary; 520-a display panel; 600-electrophoresis device.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

As shown in fig. 1, the battery device 100 includes a battery body 110, and the battery body 110 may include a plurality of battery cells 120. The plurality of cells 120 are configured to convert chemical energy into electrical energy.

The cell 120 may include an electrode assembly, an electrolyte, and a cell housing. The electrode assembly and the electrolyte may be housed in a cell housing. The electrode assembly may include a positive electrode tab, a negative electrode tab, and a separator. The positive pole piece and the negative pole piece can be used for removing and inserting metal ions (such as lithium ions) so as to realize energy storage and release. The positive pole piece and the negative pole piece are main body energy storage parts of the battery cell 120, and can embody the energy density, the cycle performance and the safety performance of the battery cell 120. And a diaphragm can be filled between the positive pole piece and the negative pole piece which are arranged at intervals. The diaphragm can penetrate metal ions, but is not conductive, so that the diaphragm can separate the positive pole piece from the negative pole piece so as to prevent short circuit between the positive pole piece and the negative pole piece. The electrolyte can be a transmission carrier of metal ions between the positive electrode plate and the negative electrode plate.

The battery cell 120 may be, but is not limited to, a rechargeable battery such as a lithium polymer battery, a lithium ion battery, a lead acid battery, a nickel cadmium battery, a nickel metal hydride battery, and the like. The shape of the battery cell 120 may be, for example, a bar shape or a plate shape. In one embodiment, the plurality of battery cells 120 in the battery module 200 may be the same type of battery cells. The number of the plurality of cells 120 shown in fig. 2 may be illustrative. It should be understood that the number of the battery cells 120 in the battery device 100 is not particularly limited in the present application.

It should be noted that the battery device may also be referred to as a battery Pack or a battery Pack, and it should be understood that embodiments of the present application are not limited thereto. In the following description, a battery device is used in a unified manner for ease of understanding.

In one possible implementation, the battery device 100 may further include other components, such as a bus bar component, a battery management system (battery management system, BMS) control module, a thermal management component (none shown), and the like.

The current collecting member may collect the positive current of the plurality of battery cells 120 to form the positive current of the battery device 100; the current collecting member may also collect the negative electrode currents of the plurality of battery cells 120 to form the negative electrode current of the battery device 100. That is, the current collecting member may collect the positive electrodes of the plurality of battery cells 120 as the positive electrode of the battery device 100 and the negative electrodes of the plurality of battery cells 120 as the negative electrode of the battery device 100.

The BMS control module is used for controlling the operation states of the plurality of battery cells 120. For example, when a fault occurs in a certain cell 120, the BMS control module may disconnect the faulty cell 120, which is beneficial for other cells 120 to work normally.

The thermal management component may be used to remove heat generated by the battery device 100 out of the battery device 100 to facilitate proper operation of the battery device 100 at a relatively suitable temperature. The thermal management component may have a cooling medium therein. The cooling medium may flow into the battery device 100 through the thermal management member and out of the battery device 100, so that the cooling medium may take away heat generated from the battery device 100. In some embodiments, the cooling medium may be air, or may be other cooling mediums, such as inert gas, or insulating liquid, which may not be limited in this embodiment.

Fig. 2 is an exploded view of one of the battery devices shown in fig. 1.

The plurality of cells 120 may be stacked. For example, as shown in fig. 2, large surfaces 1311 of two adjacent cells 120 (large surface 1311 may refer to a surface of the cell 120 having the largest area) may be disposed opposite to each other, and electrode terminals 1314 may be disposed on side surfaces 1312 of the cells 120 (side surfaces 1312 may refer to surfaces of the cells 120 having the medium area). As another example, the sides 1312 of two adjacent cells 120 may be disposed opposite each other. Electrode terminal 1314 may be provided on facet 1313 of cell 120 (facet 1313 may refer to the surface of cell 120 where the area is smallest).

The positive terminal can be conducted with the positive plate. The negative terminal may be in electrical communication with the negative pole piece.

The battery device 100 may further include a case 130 for accommodating the battery main body 110.

Specifically, the case 130 may include a case body 1321 and a cover plate 1322. The cover plate 1322 may cover, for example, an opening of the box body 1321 and be connected to the opening of the box body 1321. In one embodiment, the box body 1321 may include two side plates 1323 disposed opposite to each other, and two end plates 1324 disposed opposite to each other. Each side plate 1323 is connected to two end plates 1324. Each end plate 1324 may be connected to two side plates 1323. Each side plate 1323 and two end plates 1324 may be fixed by welding or riveting, for example. The side plates 1323 and the end plates 1324 can play a role in fixing and protecting the battery body 110.

It should be noted that, the case 130 is made of a metal material, but the case 130 and the battery cell 120 have good electrical insulation characteristics due to the insulating film. However, in the actual production, during the installation and use of the battery device 100, due to the introduction of the metal foreign matters or the breakage of the insulating film, the housing of the battery cell 120 and the case 130 may be shorted, so as to cause an electrical insulation failure problem, and in severe cases, the case 130 or the housing of the battery cell 120 may be perforated, so as to cause a safety problem.

Currently, the battery device is usually detected by an instrument or a circuit monitoring mode in the industry to judge whether the battery device has electrical insulation failure, but the method needs to detect the battery devices one by one, so that the method has the defects of low efficiency and incapability of rapidly detecting the electrical insulation failure.

In view of this, the embodiment of the application aims to provide a battery device, which can rapidly detect the problem of electrical insulation failure of the battery device and improve the detection efficiency.

The battery device provided in the present application is described in detail below.

As shown in fig. 3, the battery device 300 includes a battery main body 110, a case 130, a detecting device 310, and a presenting device 320, and the detecting device 310 and the presenting device 320 may be fixed to the case 130 by means of mechanical connection.

Specifically, the battery body 110 includes a positive electrode and a negative electrode, and the case 130 includes a metal portion for accommodating the battery body 110, and an insulating material is provided between the case 130 and the battery body 110. The detecting means 310 comprises a first port and a second port, the detecting means 310 is arranged to detect a voltage difference between the first port and the second port, and the presenting means 320 is arranged to present a change in the voltage difference detected by the detecting means 310.

Alternatively, in one possible implementation, the first port is connected to the positive electrode of the battery body 110 and the second port is connected to the metal portion of the case 130. At this time, it is considered that the voltage (potential) of the case 130 after occurrence of the electrical insulation failure is smaller than the voltage (potential) at the positive electrode of the battery body 110.

Alternatively, in one possible implementation, the first port is connected to the negative electrode of the battery body 110, and the second port is connected to the metal part of the case 130. At this time, it is considered that the voltage (potential) of the case 130 after occurrence of the electrical insulation failure is greater than the voltage (potential) at the negative electrode of the battery body 110.

As described above, the positive electrode of the battery body 110 may be understood as being formed by collecting the positive electrodes of the plurality of cells 120, and thus may be referred to as a total positive electrode, and the negative electrode of the battery body 110 may be understood as being formed by collecting the negative electrodes of the plurality of cells 120, and thus may be referred to as a total negative electrode. In the following description, for ease of understanding, a positive electrode and a negative electrode are collectively used in place of the total positive electrode and the total negative electrode for explanation.

It should be further noted that the detecting device 310 and the presenting device 320 may be an integrated device, or may be a device that is fixed together by a mechanical structure (e.g., a wire connection, a threaded connection, etc.), which should be understood that the embodiments of the present application are not limited thereto.

Alternatively, in one possible implementation, the presentation device 320 may be secured to the outer surface of the case 130 by any of the following connections, for example, by a screw connection, or by a welded connection, or by an adhesive connection, and it should be understood that embodiments of the present application are not limited herein.

Alternatively, in one possible implementation, the detecting device 310 may be fixed to the outer surface of the case 130 by any of the following connection methods, for example, may be fixed to the outer surface of the case 130 by a screw connection method, may be fixed to the outer surface of the case 130 by a welding connection method, or may be fixed to the outer surface of the case 130 by an adhesive connection method, and it should be understood that the embodiment of the present application is not limited herein.

The outer surface of the case 130 may include a case body 1321 (including a side plate 1323, an end plate 1324) and a cover plate 1322 of the case 130, namely. The presentation device 320 may be fixed to the side plate 1323 of the housing 130, to the end plate 1324 of the housing 130, or to the cover plate 1322.

It should be appreciated that embodiments of the present application are not limited to a particular fixed location of presentation device 320 and detection location 310 on the outer surface of housing 130.

Alternatively, in one possible implementation, the insulating material may be an insulating film coated on the outside of the battery body 110.

Specifically, the insulating film may also be coated on the outside of the battery cell 120 included in the battery body 110, so as to insulate between the battery body 110 and the case 130, and further, to provide the battery device 100 with good electrical insulation characteristics.

Note that this insulating film may also be referred to as an insulating layer or the like, and it is to be understood that the embodiment of the present application is not limited thereto.

Alternatively, in one possible implementation, the detection device 310 may be an electrophoresis device. The electrophoretic device comprises electrophoretic particles, the presentation means 320 comprise a display panel, and when the electrophoretic device detects that the voltage difference between the first port and the second port is larger than or equal to a first threshold value, the electrophoretic particles are able to move under the effect of the voltage difference, and the movement of the electrophoretic particles is presented on the display panel. In this case, the electrophoretic particles having a drive voltage equal to the first threshold value may be selected, and for example, if the first threshold value is set to 6v, the electrophoretic particles having a drive voltage of 6v may be selected when the electrophoretic particles are selected.

Fig. 4 is a schematic block diagram of an electrophoresis apparatus 400 according to an embodiment of the present invention. It should be noted that the detection device 320 may be the electrophoresis device 400 in certain cases, that is, the electrophoresis device 400 may be located on the outer surface of the case 130 shown in fig. 3.

As shown in fig. 4, the electrophoretic device 400 includes a first substrate 410, a second substrate 420 disposed on a display side, and a display panel 440.

Specifically, the first substrate 410 and the second substrate 420 are spaced apart from each other by a predetermined distance, and a dispersion (not shown) in which electrophoretic particles (not shown) are distributed is filled in a closed container formed of the first substrate 410, the second substrate 420 and the partition wall 430, and the first electrode 450 and the second electrode 460 are disposed along side surfaces of the partition wall 430. Wherein the first electrode 450 is connected to a first port of the electrophoretic device 400, and the second electrode 460 is connected to a second port of the electrophoretic device 400.

In this application, the first port of the electrophoresis device 400 is connected to the positive electrode of the battery body 110 through a wire, the second port of the electrophoresis device 400 is connected to the metal portion of the case 130 through a wire, or the first port of the electrophoresis device 400 is connected to the negative electrode of the battery body 110 through a wire, and the second port of the electrophoresis device 400 is connected to the metal portion of the case 130 through a wire.

Specifically, when the electrophoresis apparatus 400 detects that the voltage difference between the first port and the second port is greater than or equal to the first threshold, it is assumed that the first threshold is set to 6v, and the driving voltage of the selected electrophoresis particles is also exemplified as 6 v.

For example, when the voltage difference is changed from "0v" to "6.4v", at which time the voltage difference is greater than the first threshold value, and 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, at which time the electrophoretic particles move in the closed container in response to the electric field applied to the first electrode 450 and the second electrode 460, i.e., the electrophoretic particles move under the voltage difference between the first electrode 450 and the second electrode 460, and display is implemented on the display panel 440 of the electrophoretic device 400. At this time, the observer can observe the movement of the electrophoretic particles through the display panel 440, and further judge that the battery device is electrically insulated from failure.

Optionally, in one possible implementation, as shown in fig. 4, the display panel 440 includes a first identifier, and when the voltage difference is greater than or equal to a first threshold value, the electrophoretic particles move to a position corresponding to the first identifier.

Specifically, the first mark may be a scale mark, when the electrophoresis apparatus detects that the voltage difference between the first port and the second port changes, for example, the voltage difference changes from "0v" to "6.4v", at this time, the voltage difference is greater than the first threshold value, and the voltage difference is greater than the driving voltage of the electrophoresis particle, at this time, the electrophoresis particle moves to the position corresponding to the first mark under the action of the voltage difference.

Optionally, in a possible implementation, as shown in fig. 4, the display device further includes a second identifier, and when the voltage difference is smaller than the first threshold, the electrophoretic particle is located at a position corresponding to the second identifier.

Specifically, the second mark may be a scale mark, and when the electrophoresis apparatus detects that the voltage difference between the first port and the second port is always "0v", the electrophoresis particle is located at a position corresponding to the second mark.

However, when the electrophoresis apparatus detects that the voltage difference between the first port and the second port is greater than or equal to the first threshold, for example, the voltage difference is changed from "0v" to "6.4v", at this time, the voltage difference is greater than the first threshold, that is, the voltage difference is greater than the driving voltage of the electrophoresis particles, and then the electrophoresis particles move from the position corresponding to the second label to the position corresponding to the first label under the action of the voltage difference.

Optionally, in a 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.

Optionally, in a possible implementation manner, the first marks are located at two ends of the display panel, and the second marks are located at a middle position of the display panel.

It should be noted that, the specific value of the first threshold setting may be determined according to practical situations such as specific safety specification requirements, and it should be understood that the embodiment of the present application is not limited thereto.

Since the driving voltages of different types of electrophoretic particles are different, it is necessary to determine which charged particle is selected as the electrophoretic particle according to the magnitude of the first threshold value to be set when selecting the electrophoretic particle.

For example, when it is determined that the battery device is electrically insulated and failed, the minimum voltage difference between the first port and the second port of the battery device is 3.2v, and at this time, the first threshold value may be set to 3.2v according to requirements of a specific safety specification or the like, and then when the electrophoretic particles are selected, the electrophoretic particles having a driving voltage equal to 3.2v are also selected. It is understood that the electrophoretic particles may be moved as long as the voltage difference acting on the electrophoretic particles is greater than or equal to 3.2 v.

Further, since the voltage difference of the battery device may vary slightly during the practical application, when the type of the electrophoretic particles is selected, it is required to determine that the electrophoretic particles will not move under the slight variation of the voltage difference, and only when the voltage difference reaches a certain threshold, for example, the voltage difference reaches the driving voltage of the electrophoretic particles, the electrophoretic particles will move. It should be understood that the selection of the type of the electrophoretic particles may be selected according to the specific application scenario, and the present application is not limited herein.

Alternatively, in one possible implementation, the electrophoretic particles comprise a single-color charged particle of the same polarity.

The electrophoretic particles are described with reference to fig. 5 as comprising a single-color charged particle of the same polarity. Fig. 5 is a schematic block diagram of an electrophoresis apparatus 500 according to an embodiment of the present invention.

Specifically, referring to fig. 5, the electrophoresis apparatus 500 further includes a capillary 510, the capillary 510 being mounted in a closed container at a horizontal angle, and the single-color charged particles and their dispersion liquid being encapsulated together in the electrophoresis apparatus 500, and a display panel 520 of the electrophoresis apparatus 500 being provided as a transparent panel so as to observe a movement change of the single-color charged particles.

Illustratively, monochromatic charged particles are exemplified as positively charged particles. The first port of the electrophoresis device 500 and the positive electrode of the battery device 300 are connected by a wire, and the second port and the case 130 are connected by a wire. As shown in fig. 5 (a), when there is no voltage difference (voltage difference is 0) between the first port and the second port, i.e., when no electrical insulation failure occurs in the battery device, the monochromatic charged particles are fixedly suspended at the left side position of the closed container, i.e., the initial position shown in fig. 5 (a).

However, when the battery device suffers an electrical insulation failure, i.e., the voltage difference between the first port and the second port is greater than or equal to the first threshold value, for example, assuming that the first threshold value is set to 6v, the voltage difference is changed in magnitude from "0v" to "6.4v", at which time the voltage difference is greater than the first threshold value. And since the driving voltage of the selected monochromatic charged particles is also 6v, i.e., the voltage difference is greater than that of the monochromatic electrophoretic particles, at this time, the monochromatic charged particles move along the capillary 510 toward the electrode opposite to the charge thereof by the voltage difference between the first port and the second port of the electrophoretic device 500, as shown in (b) of fig. 5, and the monochromatic charged particles migrate along the capillary 510 from the initial position to the target position.

Then, the observer can observe the color display of the single-color charged particles at the position of the second electrode 460 (which may be understood as a negative electrode) through the color shift displayed on the display panel 520, and then the observer can consider that the single-color charged particles move from the initial position to the target position under the action of the electric field, and the observer judges that the electrical insulation failure of the battery device occurs.

Alternatively, in one possible implementation, the initial position may be a position corresponding to the second identifier on the display panel 520, and the target position may be a position corresponding to the first identifier on the display panel 520. As shown in fig. 5, the first logo is located at one end of the display panel 520, and the second logo is located at the other end of the display panel 520.

For example, the first mark and the second mark may be scale value marks, and when there is no voltage difference between the first port and the second port of the electrophoresis apparatus, i.e., the voltage difference is "0v", the monochrome charged particles are located at a position (i.e., an initial position) corresponding to the second mark. When the voltage difference between the first port and the second port of the electrophoresis apparatus is greater than or equal to the first threshold, for example, when the voltage difference is changed from "0v" to "6.4v", that is, when the voltage difference is greater than the set first threshold (driving voltage), the monochrome charged particles move from the position (initial position) corresponding to the second logo to the position (target position) corresponding to the first logo.

It should be understood that the first identifier and the second identifier may also be color identifiers, number identifiers, text identifiers, etc., which are not limited in this embodiment of the present application.

The single-color charged particles may be the same type of particles, or may be two or more different types of particles having the same polarity, and it is to be understood that the embodiment of the present application is not limited thereto.

It should be further noted that, the specific value of the first threshold setting may be determined according to practical situations such as specific safety specification requirements, and it should be understood that the embodiment of the present application is not limited thereto.

Since the drive voltages of different types of electrophoretic particles (monochromatic charged particles) are different, it is necessary to determine which charged particle is selected as the electrophoretic particle according to the size of the first threshold value to be set when the electrophoretic particle (monochromatic charged particle) is selected.

In this application, the length of the capillary tube may range from 1 cm to 10cm and the diameter of the tube may range from 2 mm to 5mm, and it is understood that the specific dimensional values of the capillary tube are merely illustrative and the embodiments of the present application are not limited thereto.

It should be further noted that the dispersion liquid described above may also be referred to as an electrophoretic medium, an electrophoretic liquid, or the like, and it should be understood that the embodiments of the present application are not limited thereto.

Alternatively, in one possible implementation, the electrophoretic particles comprise two charged particles of opposite polarity and different color.

The electrophoretic particles will be described with reference to fig. 6, which include two charged particles of opposite polarity and different colors. Fig. 6 is a schematic structural diagram of an electrophoresis apparatus 600 according to an embodiment of the present invention.

In fig. 6, the dual-color charged particles and their dispersion are packaged together in an electrophoretic device 600, and a display panel 520 of the electrophoretic device 600 is provided as a transparent panel so as to observe the movement of the dual-color charged particles.

The examples are given where the bicolor charged particles comprise two oppositely polarized and differently colored charged particles. Specifically, two kinds of charged particles with opposite polarities and different colors are coated in the microcapsule, and the two kinds of charged particles respectively perform electrophoretic migration movement in opposite directions under the action of an external electric field to realize display.

Illustratively, the first port of the electrophoresis device 600 and the positive electrode of the battery device 300 are connected by a wire, and the second port and the case 130 are connected by a wire. As shown in fig. 6 (a), when there is no voltage difference (voltage difference is 0) between the first port and the second port, i.e., when no electrical insulation failure of the battery device occurs, at this time, the two charged particles having different colors are fixedly suspended in the middle position of the closed container, i.e., the initial position shown in fig. 6 (a).

However, when the battery device suffers an electrical insulation failure, i.e., the voltage difference between the first port and the second port is greater than or equal to the first threshold value, for example, assuming that the first threshold value is set to 6v, the voltage difference is changed in magnitude from "0v" to "6.4v", at which time the voltage difference is greater than the first threshold value. And since the driving voltages of the two selected electrophoretic particles are 6v, that is, the voltage difference is greater than the driving voltages of the two electrophoretic particles, at this time, the charged particles of the two different colors respectively move along the capillary 510 to the electrode with opposite polarity to the self charge under the action of the electric field applied to the electrophoresis device due to opposite polarity.

As shown in fig. 6 (b). For example, negatively charged particles of two different colors of charged particles move along the capillary 510 toward the first electrode 450 (which may be understood as a positive electrode at this time) connected to the first port. The positively charged particles of the two different colored charged particles move along the capillary 510 to the position of the second electrode 460 (the second electrode may be understood as a negative electrode) connected to the second port.

Then, the observer can recognize that the two charged particles with different colors move from the initial position to the target position under the action of the electric field by the color shift displayed on the display panel 520, that is, finally, the observer can observe different color displays at the positions of the first electrode 450 and the second electrode 460 respectively, so as to judge that the electric insulation failure problem occurs in the battery device.

Note that, the initial position shown in fig. 6 may be a position corresponding to the second identifier on the display panel, and the target position may be a position corresponding to the first identifier on the display panel. As shown in fig. 6, the first marks are located at both ends of the display panel 520, and the second marks are located at the middle of the display panel.

For example, the first identifier and the second identifier may be scale value identifiers, and when there is no voltage difference between the first port and the second port of the electrophoresis device, i.e., the voltage difference is "0v", the two charged particles are located at positions corresponding to the second identifier (i.e., initial positions). When the voltage difference between the first port and the second port of the electrophoretic device is greater than or equal to the first threshold, for example, when the voltage difference is changed from "0v" to "6.4v", that is, when the voltage difference is greater than the set first threshold (driving voltage), the two kinds of electrophoretic particles move from the position (initial position) corresponding to the second mark to the position (target position) corresponding to the first mark.

Since the driving voltages of different types of electrophoretic particles are different, it is necessary to determine which charged particle is used as the electrophoretic particle according to the magnitude of the set first threshold value when selecting the electrophoretic particle.

For example, when it is determined that the battery device is electrically insulated and failed, the minimum voltage difference between the first port and the second port of the battery device is 3.2v, and at this time, the first threshold value may be set to 3.2v according to requirements of a specific safety specification or the like, and then, when the electrophoretic particles are selected, the electrophoretic particles having a driving voltage equal to 3.2v should also be selected. It is understood that the electrophoretic particles may be moved as long as the voltage difference acting on the electrophoretic particles is greater than or equal to 3.2 v.

It should be further noted that the specific numerical range of the first threshold may be determined according to the specific situation of the practical application, and it should be understood that the embodiment of the present application is not limited to this.

Alternatively, in one possible implementation, the detecting device 310 may be an indicator light device, and the presenting device 320 may be an indicator light that lights when the indicator light device detects that the voltage difference between the first port and the second port is greater than or equal to the first threshold. In this case, the indicator lamp having the rated voltage value of the first threshold value may be selected, and if the first threshold value is set to 6.4V, the indicator lamp having the rated voltage value of 6.4V may be selected, as the case may be.

Specifically, the first port of the indicator light device is connected to the positive electrode of the battery main body 110 through a wire, and the second port of the indicator light device is connected to the metal portion of the case 130 through a wire, or the first port of the indicator light device is connected to the negative electrode of the battery main body 110 through a wire, and the second port of the indicator light device is connected to the metal portion of the case 130 through a wire.

Further, when the indicator light device detects that the voltage difference between the first port and the second port is greater than or equal to the first threshold value, for example, the voltage difference is changed from "0v" to "6.4v", at which time the voltage difference is equal to the first threshold value, that is, the voltage difference is equal to the rated voltage value of the indicator light device, this means that current flows in the circuit loop where the indicator light device is located, and the voltage reaches the rated voltage of the indicator light, then the indicator light will be turned on. At this time, the observer observes that the indicator lamp is lit, and thereby judges that the electrical insulation failure of the battery device occurs.

It should be noted that the indicator light may be a light emitting diode (light emitting diode, led) light, and it should be understood that the embodiment of the present application does not limit the type and color of the indicator light.

Further, since the voltage difference of the battery device may vary slightly during the practical application, when selecting the type of the indicator lamp, it is necessary to determine that the indicator lamp will not be turned on under the slight variation of the voltage difference, and only when the voltage difference reaches a certain threshold, for example, the voltage difference reaches the rated voltage of the indicator lamp, the indicator lamp will be turned on. It should be understood that the type of indicator light may be selected according to the specific application scenario, and the present application is not limited herein.

Alternatively, in one possible implementation, the detecting means 310 may be a buzzer means and the presenting means 320 may be a buzzer. When the buzzer detects that the voltage difference between the first port and the second port is larger than or equal to a first threshold value, the buzzer buzzes. In this case, a buzzer with a rated voltage value of a first threshold value may be selected, and if the first threshold value is set to 6.4V, a buzzer with a rated voltage value of 6.4V may be selected, as the case may be.

Specifically, the first port of the buzzer is connected to the positive electrode of the battery main body 110 through a wire, and the second port of the buzzer is connected to the metal portion of the case 130 through a wire, or the first port of the buzzer is connected to the negative electrode of the battery main body 110 through a wire, and the second port of the buzzer is connected to the metal portion of the case 130.

For example, when the buzzer detects that the voltage difference between the first port and the second port is greater than or equal to the first threshold, for example, the voltage difference is changed from "0v" to "6.4v", at which time the voltage difference is equal to the first threshold, that is, the voltage difference is equal to the rated voltage value of the buzzer, it may be understood that the battery device may supply power to the buzzer device at this time, and then the control unit in the buzzer device controls the buzzer piece in the buzzer to vibrate, thereby causing the buzzer to buzze. At this time, the observer hears a beeping sound from the buzzer, and it is determined that the battery device has an electrical insulation failure.

Further, since the voltage difference of the battery device may vary slightly during the practical application, when selecting the type of the buzzer, it is necessary to determine that the buzzer does not buzzing under the slight variation of the voltage difference, and only when the voltage difference reaches a certain threshold, for example, when the voltage difference reaches the rated voltage of the buzzer, the buzzer buzzes. It should be understood that the type of buzzer may be selected according to the specific application scenario, and the present application is not limited herein.

It should be noted that the buzzer may be an electromagnetic buzzer or may be a piezoelectric buzzer, etc., and it should be understood that the embodiment of the present application is not limited thereto.

Alternatively, in one possible implementation, the detecting means 310 may be a voltmeter and the presenting means 320 may be a display screen, the display screen of the voltmeter displaying a specific voltage value when the voltmeter detects a change in the voltage difference between the first port and the second port.

Specifically, the first port of the voltmeter is connected with the positive electrode of the battery main body 110 through a wire, the second port of the voltmeter is connected with the metal part of the box 130 through a wire, or the first port of the voltmeter is connected with the negative electrode of the battery main body 110 through a wire, and the second port of the voltmeter is connected with the metal part of the box 130 through a wire.

Further, when the voltmeter detects that the voltage difference between the first port and the second port is changed, for example, the voltage is changed from "0v" to "6.4v", a specific voltage value is displayed on the display screen of the voltmeter. Then, the observer judges that the battery device is electrically insulated from failure by observing the voltage value on the voltmeter.

It should be noted that, since the voltage difference of the battery device may vary slightly during the practical application, we observe the specific voltage value displayed on the voltmeter, and only when the voltage difference reaches a certain threshold, it can be determined that the battery device has electrical insulation failure.

It should be noted that the detecting means and the presenting means are not limited to the case illustrated in the present application, and any means capable of detecting a voltage change between the first port and the second port and by which an observer can judge that the battery device is electrically insulated from failure may be referred to as the detecting means and the presenting means.

According to the battery device provided by the embodiment of the application, the problem of electrical insulation failure of the battery device can be detected rapidly, and the detection efficiency is improved.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A battery device, characterized by comprising:

a battery body including a positive electrode and a negative electrode;

a case including a metal portion for accommodating the battery body, an insulating material being provided between the case and the battery body;

the detection device comprises 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, the second port is connected with the metal part, and the detection device is used for detecting the voltage difference between the first port and the second port;

and the presenting device is used for presenting the change condition of the voltage difference.

2. The device of claim 1, wherein the detection means comprises electrophoretic particles and the presentation means comprises a display panel;

When the voltage difference is greater than or equal to a first threshold value, the electrophoretic particles move under the action of the voltage difference, and the display panel displays the movement of the electrophoretic particles.

3. The apparatus of claim 2, wherein the display panel comprises a first logo,

and when the voltage difference is greater than or equal to the first threshold value, the electrophoretic particles move to the position corresponding to the first mark.

4. The apparatus of claim 3, wherein the display panel further comprises a second logo,

and when the voltage difference is smaller than the first threshold value, the electrophoretic particles are positioned at the positions corresponding to the second marks.

5. The apparatus of claim 4, wherein the device comprises a plurality of sensors,

the first mark is positioned at one end of the display panel, and the second mark is positioned at the other end of the display panel.

6. The apparatus of claim 4, wherein the device comprises a plurality of sensors,

the first marks are positioned at two ends of the display panel, and the second marks are positioned at the middle position of the display panel.

7. The apparatus of any one of claims 2 to 6, wherein the electrophoretic particles comprise a single-color charged particle of the same polarity.

8. The device according to any one of claims 2 to 6, wherein the electrophoretic particles comprise two charged particles of opposite polarity and different color.

9. The device according to any one of claims 1 to 8, wherein the presentation means comprises an indicator light,

and when the voltage difference is greater than or equal to a first threshold value, the indicator lamp is lighted.

10. The device according to any one of claims 1 to 8, wherein the presenting means comprises a buzzer,

and when the voltage difference is greater than or equal to a first threshold value, the buzzer buzzes.

11. The device of any one of claims 1 to 10, wherein the presentation device is secured to an outer surface of the housing.

12. An energy storage device comprising one or more battery arrangements as claimed in any one of claims 1 to 11 for receiving external charging or discharging to the outside.