CN116259870A - A battery device, energy storage device - Google Patents

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

A battery device, energy storage device

technical field

The embodiments of the present application relate to the field of batteries, and more specifically, to a battery device and an energy storage device.

Background technique

Energy storage power stations are generally battery systems composed of battery devices. The voltage is often high, generally several hundred volts. High-voltage safety protection is an important technology for high-voltage battery device systems. Under normal conditions, the positive/negative bus bar of the battery device and the box of the device have good insulation performance, but during use, due to vibration, device aging, moisture, corrosion and other problems, the insulation film may be damaged, and in severe cases, it may be damaged. It will cause the box body of the battery device or the aluminum shell of the battery cell to perforate, thereby causing the electrical insulation failure of the battery device and affecting the personal safety of the operator. For example, if a ground fault occurs in the battery device, the energy storage converter connected to it may be damaged or even catch fire. Therefore, in such a high-voltage battery device system, it is of great significance to detect the electrical insulation failure of the battery device.

At present, the industry usually uses instrumentation or circuit monitoring to detect electrical insulation failure of battery devices. However, such methods have low detection efficiency in actual use and cannot quickly detect electrical insulation failure of battery devices.

In view of this, the purpose of the present application is to propose a battery device that can quickly detect the electrical insulation failure of the battery device and improve detection efficiency.

Contents of the invention

The embodiment of the present application provides a battery device, which can quickly detect the electrical insulation failure of the battery device, and further improve the detection efficiency.

In a first aspect, a battery device is provided, comprising: a battery body including a positive electrode and a negative electrode; a box body including a metal part for accommodating the battery body, an insulating material is arranged between the box body and the battery body; The device comprises a first port and a second port, the first port is connected to the positive pole, the second port is connected to the metal part; or, the first port is connected to the negative pole, and the second port is connected to the metal part , the detection device is used to detect the voltage difference between the first port and the second port; the display device is used to display the change of the voltage difference.

According to the battery device provided in the present application, it is possible to quickly detect the electrical insulation failure of the battery device, and further improve the detection efficiency.

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

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

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

In the present application, the first port of the electrophoretic device is connected to the positive pole of the battery body through a wire, and the second port of the electrophoretic device is connected to the metal part of the box through a wire, or the first port of the electrophoretic device is connected to the positive electrode of the battery body through a wire. The negative electrode of the battery main body is connected with the wire, and the second port of the electrophoresis device is connected with the metal part of the box body through the wire.

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

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

Optionally, in a possible implementation manner, the presentation device may be a buzzer, and 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, the buzzer The buzzer beeps.

Specifically, the first port of the buzzing device is connected to the positive pole of the battery body through a wire, and the second port of the buzzing device is connected to the metal part of the box through a wire, or the first port of the buzzing device It is connected with the negative pole of the battery main body through wires, and the second port of the buzzer is connected with the metal part of the box.

With reference to the first aspect, in some implementations of the first aspect, the detection device includes electrophoretic particles, the presentation device includes a display panel, and when the voltage difference is greater than or equal to a first threshold, the electrophoretic particle The movement of the electrophoretic particles is displayed on the display panel. According to the battery device provided in the present application, it is possible to quickly detect the electrical insulation failure of the battery device, and further improve the detection efficiency.

With reference to the first aspect, in some implementation manners of the first aspect, the display panel includes a first mark, and when the voltage difference is greater than or equal to the first threshold, the electrophoretic particle moves to a position corresponding to the first mark. According to the battery device provided in the present application, it is possible to quickly detect the electrical insulation failure of the battery device, and further improve the detection efficiency.

With reference to the first aspect, in some implementation manners of the first aspect, the display panel further includes a second mark, and when the voltage difference is smaller than the first threshold, the electrophoretic particle is located at a position corresponding to the second mark. According to the battery device provided in the present application, it is possible to quickly detect the electrical insulation failure of the battery device, and further improve the detection efficiency.

With reference to the first aspect, in some implementation manners of the first aspect, the first mark is located at one end of the display panel, and the second mark is located at the other end of the display panel. According to the battery device provided in the present application, it is possible to quickly detect the electrical insulation failure of the battery device, and further improve the detection efficiency.

With reference to the first aspect, in some implementation manners of the first aspect, the first mark is located at both ends of the display panel, and the second mark is located in the middle of the display panel. According to the battery device provided in the present application, it is possible to quickly detect the electrical insulation failure of the battery device, and further improve the detection efficiency.

With reference to the first aspect, in some implementation manners of the first aspect, the electrophoretic particle includes a single-color charged particle with the same polarity.

With reference to the first aspect, in some implementations of the first aspect, the electrophoretic particles include two charged particles with opposite polarities and different colors. According to the battery device provided in the present application, it is possible to quickly detect the electrical insulation failure of the battery device, and further improve the detection efficiency.

With reference to the first aspect, in some implementation manners of the first aspect, the presentation device includes an indicator light, and when the voltage difference is greater than or equal to a first threshold, the indicator light is turned on. According to the battery device provided in the present application, it is possible to quickly detect the electrical insulation failure of the battery device, and further improve the detection efficiency.

With reference to the first aspect, in some implementation manners of the first aspect, the presentation device includes a buzzer, and when the voltage difference is greater than or equal to a first threshold, the buzzer buzzes. According to the battery device provided in the present application, it is possible to quickly detect the electrical insulation failure of the battery device, and further improve the detection efficiency.

With reference to the first aspect, in some implementation manners of the first aspect, the presentation device is fixed on the outer surface of the box. According to the battery device provided in the present application, it is possible to quickly detect the electrical insulation failure of the battery device, and further improve the detection efficiency.

In a second aspect, there is provided an energy storage device, which is characterized in that it includes the battery device as described in the first aspect and certain implementation manners of the first aspect, and is configured to receive external charging or discharge externally.

It should be noted that the energy storage device may be an energy storage power station, a large fixed energy storage device, and the like.

Description of drawings

FIG. 1 is a schematic structural diagram of a battery device 100 provided by an embodiment of the present application.

FIG. 2 is an exploded view of a battery device shown in FIG. 1 .

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

FIG. 4 is a schematic structural diagram of an electrophoretic device 400 provided in an embodiment of the present application.

FIG. 5 is a schematic structural diagram of an electrophoretic device 500 provided in an embodiment of the present application.

FIG. 6 is a schematic structural diagram of an electrophoretic device 600 provided in an embodiment of the present application.

Reference signs:

100-battery device; 110-battery body; 120-battery core; 130-box; 1311-big surface of battery; 1312-side of battery; 1313-small side of battery; 1314-electrode terminal; 1321-main body of box ; 1322-cover plate; 1323-side plate; 1324-end plate; 300-battery device; 310-detection device; 440-display panel; 450-first electrode; 460-second electrode; 500-electrophoretic device; 510-capillary; 520-display panel; 600-electrophoretic device.

Detailed ways

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

FIG. 1 is a schematic structural diagram of a battery device 100 provided by an embodiment of the present application.

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 used to convert chemical energy into electrical energy.

The cell 120 may include an electrode assembly, an electrolyte, and a cell casing. The electrode assembly and the electrolyte can be housed in the cell shell. The electrode assembly may include a positive pole piece, a negative pole piece, and a separator. Positive pole pieces and negative pole pieces can deintercalate metal ions (such as lithium ions) to achieve energy storage and release. The positive pole piece and the negative pole piece are the main energy storage parts of the battery cell 120 , which can reflect the energy density, cycle performance and safety performance of the battery cell 120 . A diaphragm may be filled between the positive pole piece and the negative pole piece arranged at intervals. The diaphragm can permeate metal ions, but the diaphragm itself is not conductive, so the diaphragm can separate the positive pole piece and the negative pole piece to prevent short circuit between the positive pole piece and the negative pole piece. The electrolyte can be the transport carrier of metal ions between the positive pole piece and the negative pole piece.

The battery cell 120 may be, but 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 core 120 may be, for example, a bar shape or a plate shape. In one embodiment, the multiple battery cells 120 in the battery module 200 may be of the same type. The number of the plurality of battery cells 120 shown in FIG. 2 may be schematic. It should be understood that the present application does not specifically limit the number of battery cells 120 in the battery device 100 .

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 this is not limited in this embodiment of the present application. For ease of understanding, in the following description, a battery device is used uniformly for description.

In a possible implementation manner, the battery device 100 may further include other components, such as a bus component, a battery management system (battery management system, BMS) control module, a thermal management component (none of which are shown in the figure) and the like.

The current converging component can gather the positive current of multiple battery cells 120 to form the positive current of the battery device 100 ; That is to say, the current-combining component can collect the positive poles of the multiple battery cells 120 as the positive pole of the battery device 100 , and gather the negative poles of the multiple battery cells 120 as the negative pole of the battery device 100 .

The BMS control module is used to control the working states of multiple battery cells 120 . For example, when a certain battery cell 120 is detected to be faulty, the BMS control module can disconnect the faulty battery cell 120, which is beneficial for other battery cells 120 to work normally.

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

FIG. 2 is an exploded view of a battery device shown in FIG. 1 .

A plurality of battery cells 120 may be stacked. For example, as shown in FIG. 2 , the large surfaces 1311 of two adjacent electric cores 120 (the large surface 1311 may refer to the surface with the largest area of the electric core 120) may be arranged opposite to each other, and the side surfaces 1312 of the electric core 120 (the lateral surface 1312 may refer to the electric The electrode terminal 1314 may be provided on the surface of the core 120 having a medium area). As another example, the side surfaces 1312 of two adjacent battery cells 120 may be arranged opposite to each other. Electrode terminals 1314 may be provided on the small surface 1313 of the battery cell 120 (the small surface 1313 may refer to the surface with the smallest area of the battery cell 120 ).

Wherein, the positive terminal can be conducted with the positive pole piece. The negative terminal can be conducted with the negative pole piece.

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

Specifically, the box body 130 may include a box body body 1321 and a cover plate 1322 . The cover plate 1322 may, for example, cover the 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 oppositely disposed, and two end plates 1324 oppositely disposed. Each side plate 1323 is connected to two end plates 1324 . Each end plate 1324 can be connected with two side plates 1323 . Each side plate 1323 and the two end plates 1324 may be fixed by welding or riveting, for example. The side plates 1323 and the end plates 1324 can fix and protect the battery body 110 .

It should be noted that the box body 130 itself is made of metal material, but the battery device 100 has good electrical insulation properties due to the existence of an insulating film between the box body 130 and the battery core 120 . However, during the installation and use of the battery device 100 in actual production, due to the introduction of metal foreign matter or the damage of the insulating film, a short circuit will occur between the casing of the battery cell 120 and the box 130, thereby causing electrical insulation failure. It may also result in perforation of the box body 130 or the casing of the battery cell 120 , thereby causing safety issues.

At present, the industry usually uses instrumentation or circuit monitoring to detect the battery device, so as to determine whether the battery device has electrical insulation failure, but the above method needs to test the battery device one by one, so it has low efficiency and cannot quickly detect electrical insulation failure. The downside of the problem.

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

The battery device provided by the present application will be described in detail below.

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

As shown in FIG. 3 , the battery device 300 includes a battery main body 110 , a box body 130 , a detection device 310 and a presentation device 320 , and the detection device 310 and the presentation device 320 can be fixed on the box body 130 through a mechanical connection.

Specifically, the battery body 110 includes a positive electrode and a negative electrode, and the box body 130 includes a metal part for accommodating the battery body 110 , and an insulating material is disposed between the box body 130 and the battery body 110 . The detection device 310 includes a first port and a second port, the detection device 310 is used to detect the voltage difference between the first port and the second port, and the display device 320 is used to display the change of the voltage difference detected by the detection device 310 .

Optionally, in a possible implementation manner, the first port is connected to the positive pole of the battery body 110 , and the second port is connected to the metal part of the box body 130 . At this time, it can be considered that the voltage (potential) of the case 130 after occurrence of electrical insulation failure is smaller than the voltage (potential) at the positive electrode of the battery main body 110 .

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

It should be noted that, as mentioned above, the positive pole of the battery main body 110 can be understood as the collection of positive poles of multiple battery cells 120, therefore, it can also be called the total positive pole, and the negative pole of the battery main body 110 can be understood as a plurality of battery cells. The negative poles of 120 are collected together, therefore, it can also be called the total negative pole. For ease of understanding, in the following description, the positive electrode and the negative electrode are collectively used instead of the total positive electrode and the total negative electrode for description.

It should also be noted that the detection device 310 and the presentation device 320 may be an integrated device, or may be a device fixed together by means of a mechanical structure (for example, wire connection, screw connection, etc.). No limit.

Optionally, in a possible implementation manner, the presentation device 320 can be fixed on the outer surface of the box body 130 by any of the following connection methods, for example, it can be fixed on the outer surface of the box body 130 by screw connection or can also be fixed on the outer surface of the box body 130 by welding, or can also be fixed on the outer surface of the box body 130 by adhesive connection. It should be understood that the embodiment of the present application is not limited here.

Optionally, in a possible implementation manner, the detection device 310 can also be fixed on the outer surface of the box body 130 by any of the following connection methods, for example, it can be fixed on the outer surface of the box body 130 by screw connection It can be fixed on the surface, or can also be fixed on the outer surface of the box body 130 by welding, or can also be fixed on the outer surface of the box body 130 by adhesive connection. It should be understood that the embodiment of the present application is not limited here.

Wherein, the outer surface of the box body 130 may include a box body body 1321 (including side plates 1323 and end plates 1324 ) and a cover plate 1322 of the box body 130 , ie. The presentation device 320 can be fixed on the side plate 1323 of the box body 130 , can also be fixed on the end plate 1324 of the box body 130 , or can also be fixed on the cover plate 1322 .

It should be understood that the embodiment of the present application does not limit the specific fixed positions of the presentation device 320 and the detection position 310 on the outer surface of the box body 130 .

Optionally, in a possible implementation manner, the insulating material may be an insulating film wrapped outside the battery body 110 .

Specifically, the insulating film can also be coated on the outside of the battery cell 120 included in the battery body 110 to insulate the battery body 110 from the casing 130 , and further make the battery device 100 have good electrical insulation properties.

It should be noted that the insulating film may also be referred to as an insulating layer, etc. It should be understood that this is not limited in the embodiment of the present application.

Optionally, in a possible implementation manner, the detection device 310 may be an electrophoretic device. The electrophoretic device includes electrophoretic particles, and the presentation device 320 includes a display panel. When the electrophoretic 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 action of the voltage difference. , and the movement of electrophoretic particles is presented on the display panel. At this time, electrophoretic particles whose driving voltage is equal to the first threshold can be selected. For example, if the first threshold is set to 6v, when electrophoretic particles are selected, electrophoretic particles whose driving voltage is also 6v are selected.

FIG. 4 is a schematic structural diagram of an electrophoretic device 400 provided in an embodiment of the present application. It should be noted that the detection device 320 mentioned above may be the electrophoretic device 400 under certain circumstances, that is, the electrophoretic device 400 may be located on the outer surface of the casing 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 the display side, and a display panel 440 .

Specifically, there is a predetermined interval between the first substrate 410 and the second substrate 420, and the airtight container formed by the first substrate 410, the second substrate 420 and the partition wall 430 is filled with a dispersion liquid (not shown in the figure), Electrophoretic particles (not shown in the figure) are distributed in the dispersion liquid, and a first electrode 450 and a second electrode 460 are provided along the side surface of the partition wall 430 . Wherein, the first electrode 450 is connected to the first port of the electrophoretic device 400 , and the second electrode 460 is connected to the second port of the electrophoretic device 400 .

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

Specifically, when the electrophoretic device 400 detects that the voltage difference between the first port and the second port is greater than or equal to the first threshold, at this time, assuming that the first threshold is set to 6v, the driving voltage of the selected electrophoretic particles An example is also given for 6v.

For example, when the voltage difference changes from "0v" to "6.4v", at this time, the voltage difference is greater than the first threshold, and since the driving voltage of the selected electrophoretic particles is 6v, that is, the voltage difference is greater than the driving voltage of the electrophoretic particles , at this time, the electrophoretic particles respond to the electric field applied on the first electrode 450 and the second electrode 460, that is, the electrophoretic particles are in the airtight container under the action of the voltage difference between the first electrode 450 and the second electrode 460 Movement occurs, and a display is realized 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 then judge that the electrical insulation failure of the battery device occurs.

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

Specifically, the first mark may be a scale value mark. When the electrophoretic device detects that the voltage difference between the first port and the second port changes, for example, when the voltage difference changes from "0v" to "6.4v", at this time, The voltage difference is greater than the first threshold, and the voltage difference is greater than the driving voltage of the electrophoretic particles. At this time, the electrophoretic particles move to the position corresponding to the first mark under the action of the voltage difference.

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

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

However, 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, for example, when the voltage difference changes from "0v" to "6.4v", at this time, the voltage difference is greater than the first threshold , that is, if 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 mark to the position corresponding to the first mark under the action of the voltage difference.

Optionally, in a possible implementation manner, the first mark is located at one end of the display panel, and the second mark is located at the other end of the display panel.

Optionally, in a possible implementation manner, the first mark is located at both ends of the display panel, and the second mark is located in the middle of the display panel.

It should be noted that the specific value set for the first threshold may be determined according to actual conditions such as specific safety specification requirements, and it should be understood that this is not limited in this embodiment of the present application.

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 is selected as the electrophoretic particle according to the set first threshold value.

For example, when it is determined that the electrical insulation failure of the battery device occurs, and the minimum voltage difference between the first port and the second port of the battery device is 3.2v, at this time, the first threshold value can be set to 3.2v according to specific safety regulations and other requirements. v, then when selecting electrophoretic particles, also select electrophoretic particles with a driving voltage equal to 3.2v. It can be understood that as long as the voltage difference acting on the electrophoretic particles is greater than or equal to 3.2v, the electrophoretic particles can move.

Furthermore, since the voltage difference of the battery device may have slight changes in the actual application process, when we select the type of electrophoretic particles, we need to ensure that the electrophoretic particles will not move under small voltage difference changes, Only when the voltage difference reaches a certain threshold, for example, when the voltage difference reaches the driving voltage of the electrophoretic particle, the electrophoretic particle will move. It should be understood that the selection of the type of electrophoretic particles may be selected according to a specific application scenario, which is not limited in this application.

Optionally, in a possible implementation manner, the electrophoretic particles include a single-color charged particle with the same polarity.

In conjunction with FIG. 5 , the electrophoretic particles include a single-color charged particle with the same polarity for illustration. FIG. 5 is a schematic structural diagram of an electrophoretic device 500 provided in an embodiment of the present application.

5, the electrophoresis device 500 also includes a capillary 510, the capillary 510 is installed in a closed container at a horizontal angle, and the monochromatic charged particles and their dispersion are packaged together in the electrophoresis device 500. The display panel 520 of the electrophoresis device 500 is set It is a transparent panel to observe the movement changes of single-color charged particles.

Exemplarily, the monochromatic charged particles are taken as positively charged particles. The first port of the electrophoretic device 500 is connected to the positive pole of the battery device 300 through a wire, and the second port is connected to the box body 130 through a wire. As shown in (a) of Figure 5, when there is no voltage difference between the first port and the second port (the voltage difference is 0), that is, when the electrical insulation failure does not occur in the battery device, at this time, the monochromatic charged particles are fixed Suspended in the left position of the airtight container, that is, the initial position shown in (a) of FIG. 5 .

However, when the electrical insulation failure of the battery device occurs, that is, when the voltage difference between the first port and the second port is greater than or equal to the first threshold, for example, assuming that the set first threshold is 6v, the magnitude of the voltage difference changes from "0v "When it changes to "6.4v", the voltage difference is greater than the first threshold. And because the driving voltage of the selected monochromatic charged particles is also 6v, that is, the voltage difference is greater than the driving voltage of the monochromatic electrophoretic particles, at this time, the monochromatic charged particles between the first port and the second port of the electrophoretic device 500 Under the action of the voltage difference, the particles move along the capillary 510 to the oppositely charged electrode, as shown in (b) of FIG. 5 , the monochromatic charged particles migrate from the initial position to the target position along the capillary 510 .

Then, 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) through the color transfer displayed on the display panel 520, then the observer can think that The monochromatic charged particles move from the initial position to the target position under the action of the electric field, and then the observer judges that the electrical insulation failure of the battery device occurs.

Optionally, in a possible implementation manner, the initial position may be a position corresponding to the second mark on the display panel 520 , and the target position may be a position corresponding to the first mark on the display panel 520 . As shown in FIG. 5 , the first mark is located at one end of the display panel 520 , and the second mark is located at the other end of the display panel 520 .

Exemplarily, the first mark and the second mark may be scale value marks. When there is no voltage difference between the first port and the second port of the electrophoretic device, that is, when the voltage difference is "0v", the monochromatic charged particles are located at the second port. Two identifies the corresponding location (ie, the initial location). 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 changes from "0v" to "6.4v", that is, the voltage difference is greater than the set first threshold (driving voltage), the monochromatic charged particles move from the position corresponding to the second mark (initial position) to the position corresponding to the first mark (target position).

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

It should be noted that the monochromatic charged particles may be the same type of particles, or two or more different types of particles with the same polarity. It should be understood that this is not limited in the embodiment of the present application.

It should also be noted that the specific value set for the first threshold may be determined according to actual conditions such as requirements of specific safety regulations, and it should be understood that this is not limited in this embodiment of the present application.

It should also be explained 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 Particles as electrophoretic particles.

For example, when it is determined that the electrical insulation failure of the battery device occurs, and the minimum voltage difference between the first port and the second port of the battery device is 3.2v, at this time, the first threshold value can be set to 3.2v according to specific safety regulations and other requirements. v, then when selecting electrophoretic particles, also select electrophoretic particles with a driving voltage equal to 3.2v. It can be understood that as long as the voltage difference acting on the electrophoretic particles is greater than or equal to 3.2v, the electrophoretic particles can move.

Furthermore, since the voltage difference of the battery device may have slight changes in the actual application process, when we select the type of electrophoretic particles, we need to ensure that the electrophoretic particles will not move under small voltage difference changes, Only when the voltage difference reaches a certain threshold, for example, when the voltage difference reaches the driving voltage of the electrophoretic particle, the electrophoretic particle will move. It should be understood that the selection of the type of electrophoretic particles may be selected according to a specific application scenario, which is not limited in this application.

In the present application, the length of the capillary can be 1-10 cm, and the diameter can be 2-5 mm. It should be understood that the specific size of the capillary is only an example, and the embodiment of the present application is not limited here.

It should also be noted that the aforementioned dispersion liquid may also be referred to as electrophoretic medium, electrophoretic liquid, etc., and it should be understood that the embodiment of the present application does not limit this.

Optionally, in a possible implementation manner, the electrophoretic particles include two charged particles with opposite polarities and different colors.

Referring to FIG. 6 , the electrophoretic particles include two kinds of charged particles with opposite polarities and different colors. FIG. 6 is a schematic structural diagram of an electrophoretic device 600 provided in an embodiment of the present application.

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

For example, two-color charged particles include two charged particles with opposite polarities and different colors. Specifically, two kinds of charged particles with opposite polarities and different colors are coated in the microcapsules, and under the action of an external electric field, the two kinds of charged particles perform electrophoretic migration in opposite directions respectively to realize display.

Exemplarily, the first port of the electrophoretic device 600 is connected to the positive electrode of the battery device 300 through a wire, and the second port is connected to the box body 130 through a wire. As shown in (a) of Figure 6, when there is no voltage difference between the first port and the second port (the voltage difference is 0), that is, when the electrical insulation failure does not occur in the battery device, at this time, the two different colors The charged particles are fixed and suspended in the middle position of the airtight container, which is the initial position shown in (a) of FIG. 6 .

However, when the electrical insulation failure of the battery device occurs, that is, when the voltage difference between the first port and the second port is greater than or equal to the first threshold, for example, assuming that the set first threshold is 6v, the magnitude of the voltage difference changes from "0v "When it changes to "6.4v", the voltage difference is greater than the first threshold. And because the driving voltages of the two selected electrophoretic particles are both 6v, that is, the voltage difference is greater than the driving voltage of the two kinds of electrophoretic particles, at this time, the charged particles of these two different colors are under the action of the electric field applied to the electrophoretic device , because the polarities of the two are opposite, the charged particles move along the capillary 510 to the electrodes with opposite polarities to their own charges.

As shown in (b) of FIG. 6 . For example, the negatively charged particles among the charged particles of two different colors move along the capillary 510 to the position of the first electrode 450 connected to the first port (in this case, the first electrode can be understood as a positive electrode). The positively charged particles among the charged particles of two different colors move along the capillary 510 to the position of the second electrode 460 connected to the second port (the second electrode can be understood as a negative electrode).

Then, the observer can observe different color displays at the positions of the first electrode 450 and the second electrode 460 respectively through the transfer of the colors displayed on the display panel 520, that is, it can be considered that the charged electrodes of two different colors The particles move from the initial position to the target position under the action of the electric field, and then it is judged that the electrical insulation failure of the battery device occurs.

It should be noted that the initial position shown in FIG. 6 may be the position corresponding to the second mark on the display panel, and the target position may be the position corresponding to the first mark on the display panel. As shown in FIG. 6 , the first mark is located at both ends of the display panel 520 , and the second mark is located in the middle of the display panel.

Exemplarily, the first mark and the second mark may be scale value marks. When there is no voltage difference between the first port and the second port of the electrophoretic device, that is, when the voltage difference is "0v", the two charged particles are located at The location corresponding to the second identifier, (ie, the initial location). 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 changes from "0v" to "6.4v", that is, the voltage difference is greater than the set first threshold (driving voltage), the two kinds of electrophoretic particles move from the position corresponding to the second mark (initial position) to the position corresponding to the first mark (target position).

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

It should be noted that the specific value set for the first threshold may be determined according to actual conditions such as specific safety specification requirements, and it should be understood that this is not limited in this embodiment of the present application.

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 is used as the electrophoretic particle according to the magnitude of the set first threshold.

For example, when it is determined that the electrical insulation failure of the battery device occurs, and the minimum voltage difference between the first port and the second port of the battery device is 3.2v, at this time, the first threshold value can be set to 3.2v according to specific safety regulations and other requirements. v, then when selecting electrophoretic particles, electrophoretic particles with a driving voltage equal to 3.2v should also be selected. It can be understood that as long as the voltage difference acting on the electrophoretic particles is greater than or equal to 3.2v, the electrophoretic particles can move.

Furthermore, since the voltage difference of the battery device may have slight changes in the actual application process, when we select the type of electrophoretic particles, we need to ensure that the electrophoretic particles will not move under small voltage difference changes, Only when the voltage difference reaches a certain threshold, for example, when the voltage difference reaches the driving voltage of the electrophoretic particle, the electrophoretic particle will move. It should be understood that the selection of the type of electrophoretic particles may be selected according to a specific application scenario, which is not limited in this application.

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

In the present application, the length of the capillary can be 1-10 cm, and the diameter can be 2-5 mm. It should be understood that the specific size of the capillary is only an example, and the embodiment of the present application is not limited here.

It should also be noted that the aforementioned dispersion liquid may also be referred to as electrophoretic medium, electrophoretic liquid, etc., and it should be understood that the embodiment of the present application does not limit this.

Optionally, in a possible implementation manner, the detection device 310 may be an indicator light device, and the presentation device 320 may be an indicator light. When the indicator light device detects the voltage difference between the first port and the second port When greater than or equal to the first threshold, the indicator light is on. At this time, an indicator light with a rated voltage value of the first threshold can be selected. According to specific circumstances, if the first threshold value is set to 6.4V, an indicator light with a rated voltage value of 6.4v can be selected.

Specifically, the first port of the indicator light device is connected to the positive pole of the battery main body 110 through a wire, and the second port of the indicator light device is connected to the metal part of the box body 130 through a wire, or the first port of the indicator light device One port is connected to the negative pole of the battery main body 110 through a wire, and the second port of the indicator light device is connected to the metal part of the box body 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, for example, the voltage difference changes from "0v" to "6.4v", and the voltage difference is equal to the first threshold. A threshold value, that is, the voltage difference is equal to the rated voltage value of the indicator light device, which means that there will be current passing through 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 light up . At this time, the observer observes that the indicator light is on, thereby judging 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. It should be understood that the embodiment of the present application does not limit the type and color of the indicator light.

Furthermore, since the voltage difference of the battery device may have slight changes in the actual application process, when we select the type of indicator light, we need to ensure that the indicator light will not light up under the slight voltage difference change, Only when the voltage difference reaches a certain threshold, for example, the voltage difference reaches the rated voltage of the indicator light, the indicator light will be turned on. It should be understood that the category of the indicator light may be selected according to a specific application scenario, which is not limited in this application.

It should also be noted that the specific value set for the first threshold may be determined according to actual conditions such as requirements of specific safety regulations, and it should be understood that this is not limited in this embodiment of the present application.

Optionally, in a possible implementation manner, the detection device 310 may be a buzzer, and the presentation device 320 may 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 the first threshold, the buzzer buzzes. At this time, a buzzer with a rated voltage value of the first threshold can be selected. According to specific conditions, if the first threshold value is set to 6.4V, a buzzer with a rated voltage value of 6.4V can be selected.

Specifically, the first port of the buzzing device is connected to the positive pole of the battery main body 110 through a wire, and the second port of the buzzing device is connected to the metal part of the box 130 through a wire, or the first port of the buzzing device One port is connected to the negative pole of the battery main body 110 through a wire, and the second port of the buzzer is connected to the metal part of the box body 130 .

Exemplarily, 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 changes from "0v" to "6.4v", and 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 can be understood that the battery device can supply power to the buzzer at this time, so the control unit in the buzzer controls the buzzer in the buzzer The chip vibrates to make the buzzer buzz. At this time, the observer hears the beeping sound from the buzzer, thereby judging that the electrical insulation failure of the battery device occurs.

Furthermore, since the voltage difference of the battery device may have slight changes in the actual application process, when we select the type of buzzer, we need to make sure that the buzzer will not be activated under a small voltage difference change. Buzzer, the buzzer will buzz only when the voltage difference reaches a certain threshold, for example, when the voltage difference reaches the rated voltage of the buzzer. It should be understood that the category of the buzzer may be selected according to a specific application scenario, which is not limited in this application.

It should also be noted that the specific value set for the first threshold may be determined according to actual conditions such as requirements of specific safety regulations, and it should be understood that this is not limited in this embodiment of the present application.

It should be noted that the buzzer device may be an electromagnetic buzzer, or may also be a piezoelectric buzzer, etc. It should be understood that this embodiment of the present application does not limit this.

Optionally, in a possible implementation manner, the detection device 310 may be a voltmeter, and the presentation device 320 may be a display screen. When the voltmeter detects that the voltage difference between the first port and the second port changes , the display screen of the voltmeter displays the specific voltage value.

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

Further, when the voltmeter detects that the voltage difference between the first port and the second port changes, for example, the voltage changes from "0v" to "6.4v", at this time, the display screen of the voltmeter displays the specific voltage value. Therefore, the observer judges that the electrical insulation failure of the battery device occurs by observing the voltage value on the voltmeter.

It should be noted that since the voltage difference of the battery device may have slight changes in the actual application process, we observe the specific voltage value displayed on the voltmeter, and only when the voltage difference reaches a certain threshold can we determine that the battery device has a fault. Failure of electrical insulation.

It should be noted that the detecting device and the presenting device are not limited to the above-mentioned examples in this application, any device can detect the voltage change between the first port and the second port, and the observer can judge the electrical insulation of the battery device through the device Failures can be referred to as detection means and presentation means.

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

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can 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 into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions described above are realized in the form of software function 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 the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other various media that can store program codes. .

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims (12)

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.

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