CN112002852A

CN112002852A - Explosion-proof battery

Info

Publication number: CN112002852A
Application number: CN202010674922.6A
Authority: CN
Inventors: 徐基维; 张能; 林豈庆; 王运鹏
Original assignee: Huarui Mining Technology Co ltd
Current assignee: Huarui Mining Technology Co ltd
Priority date: 2020-07-14
Filing date: 2020-07-14
Publication date: 2020-11-27

Abstract

The application provides an explosion-proof battery, which comprises a box body and an explosion-proof box body connected with the box body; the battery module is arranged in the box body, a first area of the battery module comprises all electrodes in the battery module, and a second area of the battery module comprises all pressure release valves in the battery module; the first pouring layer covers the first area, and a first opening of the first pouring layer corresponds to the pressure release valve so that the pressure release valve can exhaust gas through the first opening; covering at least the second pouring layer of the second area so as to break the second pouring layer when the pressure release valve is opened; the power supply control module is arranged in the explosion-proof box body; and the first lead device is arranged between the explosion-proof box body and the box body. Through this application can effectively reduce the realization cost and the weight of the explosion-proof mechanism of battery to and ensure that except the battery module through the pouring and sealing processing when the explosive environment appears, other expose the conductor and all do not all electrified, thereby realize in time stopping the contact of point flame source and explosive gas, effectively promote economic nature and the explosion-proof control effect that the explosion-proof mechanism realized.

Description

Explosion-proof battery

Technical Field

The application relates to the technical field of battery safety application, in particular to an explosion-proof battery.

Background

At present, a high-capacity explosion-proof battery used in an underground coal mine mainly uses a special or increased-safety lead-acid storage battery power supply, and has the defects of small energy density, low voltage, few cycle times, serious environmental pollution and the like, and GB 3836 series and IEC60079 series explosion-proof standards have a plurality of limitations on the use of the lead-acid storage battery, and the underground high-capacity storage battery has no particularly good solution for power supply. In recent years, equipment such as various underground robots, intelligent dangerous mixture monitoring and monitoring systems and pure electric auxiliary transportation equipment based on new technologies such as 5G and the Internet of things gradually emerge, the requirement of the equipment on battery capacity is increased, however, at present, no high-safety-reliability explosion-proof battery matched with the equipment is available, and the current situation becomes a technical bottleneck restricting the research and development application of the underground robot equipment.

Disclosure of Invention

The present application is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, the purpose of this application is to provide an explosion-proof battery, can effectively reduce the realization cost and the weight of the explosion-proof mechanism of battery to and ensure when the explosive environment appears except the battery module through the encapsulation processing, other expose the conductor all not electrified, thereby realize in time stopping the contact of breakpoint fire source and explosive gas, effectively promote economic nature and the explosion-proof control effect that the explosion-proof mechanism realized.

In order to achieve the above object, an explosion-proof battery provided in an embodiment of the present application includes: the explosion-proof box body is connected with the box body; the battery module is arranged in the box body and comprises a first area and a second area, the first area comprises all electrodes in the battery module, and the second area comprises all pressure relief valves in the battery module; the first pouring layer covers the first area of the battery module, and is provided with a first opening corresponding to the pressure release valve, so that the pressure release valve can exhaust gas through the first opening; the second pouring layer at least covers the second area of the battery module, wherein the impact strength of the second pouring layer is smaller than that of the pressure release valve when the pressure release valve is opened, so that the pressure release valve breaks through the second pouring layer when the pressure release valve is opened; the power supply control module is arranged in the explosion-proof box body; and the first lead device is arranged between the box body and the explosion-proof box body.

The explosion-proof battery provided by the embodiment of the application is characterized in that a box body and an explosion-proof box body connected with the box body are configured aiming at the explosion-proof battery, a battery module is arranged in the box body, a first pouring sealing layer covers a first area of the battery module, and a second pouring layer at least covering the second area of the battery module, wherein the first pouring layer covering the first area of the battery module and the second pouring layer at least covering the second area of the battery module are adopted to realize the pouring protection of the battery module, the explosion-proof box body is adopted to realize the explosion-proof protection of the power supply control module, the realization cost and the weight of the explosion-proof mechanism of the battery can be effectively reduced, and the explosion-proof box body is ensured to not only the poured battery module when the explosive environment occurs, other exposed conductors are not electrified, so that the contact between the fire source and the explosive gas is timely blocked, and the economy and the explosion-proof control effect of the explosion-proof mechanism are effectively improved.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of an explosion-proof battery according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a battery module according to another embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a power control module according to another embodiment of the present application;

fig. 4 is a schematic structural view of an explosion-proof battery according to another embodiment of the present application.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. On the contrary, the embodiments of the application include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.

Fig. 1 is a schematic structural diagram of an explosion-proof battery according to an embodiment of the present application.

Referring to fig. 1, the explosion-proof battery 10 includes: the explosion-proof box body 12 is connected with the box body 11; a battery module 13 disposed in the case 11, wherein the battery module 13 includes a first region including all of the electrodes 131 in the battery module 13 and a second region including all of the pressure relief valves 132 in the battery module 13; a first potting layer 133 covering a first area of the battery module 13, the first potting layer 133 having a first opening corresponding to the pressure release valve 132 so that the pressure release valve 132 can release air through the first opening; and a second potting layer 134 covering at least a second region of the battery module 13, wherein the impact strength of the second potting layer 134 is smaller than the impact strength of the relief valve when opened, so that the relief valve 132 breaks the second potting layer 134 when opened; a power supply control module 14 disposed in the explosion-proof case 12; and a first lead wire device 15 arranged between the explosion-proof case body 12 and the case body 11.

In the embodiment of the present application, the explosion-proof battery 10 is exemplified by a lithium battery, or may be any other possible battery for coal mine downhole operation, which is not limited to this.

The battery module 13 in this application embodiment disposes in box 11, and disposes the explosion-proof box 12 that links to each other with box 11, and dispose power control module 14 in this explosion-proof box 12 to make power control module 14 can control all on-off control unit disconnection when explosive environment appears, ensure except that battery module 13 through the encapsulation processing, other exposed conductors are all not electrified, thereby realize blockking the contact of ignition source and explosive gas from the source. And only the box body provided with the power supply control module 14 is set as an explosion-proof box body 12, and the box body 11 provided with the battery module 13 is configured as a common box body, so that the implementation cost and weight of an explosion-proof mechanism of the battery can be effectively reduced, the isolation configuration of the power supply control module 14 and the battery module 13 is realized, and the economy of the implementation of the explosion-proof mechanism and the balance between the explosion-proof control effects are effectively improved.

The explosion-proof case 12 may be welded to the case 11, or the explosion-proof case 12 may be welded to a side surface of the case 11, which is not limited thereto.

The battery module 13 includes: the battery pack comprises a battery pack and a battery pack management and protection unit matched with the battery pack, wherein the battery pack can be formed by connecting single lithium batteries in a series or parallel mode.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a battery module according to another embodiment of the present disclosure, the battery module including: a battery pack 201 formed by connecting single lithium batteries in series or parallel, and a battery pack management and protection unit 202 matched with the battery pack, referring to fig. 3, fig. 3 is a schematic structural diagram of a power supply control module provided in another embodiment of the present application, and the power supply control module may include, for example, an electrical circuit switch unit 301 and a communication circuit switch unit 302.

The electrical circuit switch unit 301 and the communication circuit switch unit 302 in the power supply control module are each composed of a certain number of relays, a certain number of fuses, and a manual mechanical switch.

When the concentration of the explosive and dangerous mixture in the environment is detected to exceed the standard, the power supply control module 14 can control all the electrical circuit switch units 301 and the communication circuit switch units 302 to be disconnected, and then the battery pack management and protection unit 202 is controlled to be disconnected from the power supply control module, so that the ignition source is prevented from being in contact with the explosive gas from the source.

In some embodiments of the present application, the second potting layer 134 also covers the first area, and the impact strength of the second potting layer 134 is less than the impact strength of the first potting layer 133.

In some embodiments of the present application, referring to fig. 4, a third encapsulation layer 135 covering the second encapsulation layer 134, where the third encapsulation layer 135 has a second opening at the position of the pressure relief valve 132, the second opening corresponds to the pressure relief valve 132, so that the pressure relief valve 132 can exhaust gas through the second opening, and the impact strength of the third encapsulation layer 135 is greater than that of the first encapsulation layer 133, that is, the third encapsulation layer 135 is a layer of encapsulation layer covering the second encapsulation layer 134, and plays a role in protecting the second encapsulation layer 134 and the first encapsulation layer 133.

In some embodiments of the present application, the first, second, and

third potting layers

133, 134, and 135 are made of silicone or epoxy, which can simplify a manufacturing process of the potting layer, ensure a better potting protection effect, and have better practicability and applicability, or may be made of any other possible potting material, which is not limited in this respect.

In some embodiments of the present application, the first, second, and

third potting layers

133, 134, and 135 fill the space between the battery modules 13 and the side walls and the bottom of the case 11 to closely fit the battery modules 13 with the case body and fix the battery modules 13.

It can be understood that, in general, the main potential ignition source of the lithium battery is an electrified component (for example, the electrode 131 of the battery module 13 in the present application), that is, the positive and negative terminals of the single lithium battery in the battery module 13, therefore, in the present embodiment, by covering and disposing the first potting layer 133 in the first area of the battery module 13, the first potting layer 133 realizes effective protection of the corresponding positive and negative terminal portions of the single battery, and disposing the second potting layer 134 at least covering the second area of the battery module 13, and the second potting layer 134 realizes protection of the first potting layer 133 and simultaneously protects the pressure release valve 132, so that effective potting protection is realized.

For example, after the battery module 13 is mounted in the case 11 in the explosion-proof housing, the battery module 13 and its support (the first support 20) are sealed with a sealing compound, the bottom and side surfaces of the sealing compound are tightly bonded to the case 11, and a certain free space is present between the upper surface of the sealing compound and the case cover 102.

In the embodiment of the present application, the impact strength of the second pouring layer 134 is configured to be smaller than the impact strength of the pressure release valve during opening, so that the pressure release valve 132 breaks the second pouring layer 134 during opening, so that the gas generated by the battery in the extreme case through the internal chemical reaction is discharged to the box body via the pressure release valve 132, and can be discharged to the external environment through the pressure release device 17 arranged on the box cover, thereby avoiding the gas accumulation inside the box body 11.

In the embodiment of the present application, the first potting layer 133 can effectively protect the positive and negative terminals of the battery module 13, so as to effectively isolate the potential ignition source from the explosive gas, thereby greatly reducing the occurrence probability of accidents such as combustion and explosion, and improving the safety protection performance of the explosion-proof battery 10.

The impact strength of the third potting layer 135 is configured to be greater than the impact strength of the first potting layer 133, so that the third potting layer 135 can form an outermost protection and a further protection to the second potting layer 134. That is to say, the third encapsulation layer 135 can further enhance the protection function of the first encapsulation layer 133 and the second encapsulation layer 134, and due to the protection and reinforcement effect of the third encapsulation layer 135, the damage degree of the second encapsulation layer 134 can be effectively limited, that is, the damage part can be limited at the relief valve 132 to the maximum extent, so that the destructive influence on the first encapsulation layer 133 is reduced to a great extent, and the reliability of the encapsulation explosion-proof protection method is improved.

In some embodiments of the present application, referring to fig. 4, the case 11 comprises:

a case body 101 and an explosion-proof case body 104;

and the box cover 102 and the explosion-proof box cover 105 are respectively arranged on the box body 101 and the explosion-proof box body 104, wherein the box cover 102 and the explosion-proof box cover 105 are connected with the box body 101 and the explosion-proof box body 104 through bolts 103, and a free space is formed between the upper surface of the pouring layer covering the battery module 13 in the box body 11 and the box cover 102.

A case body 101; and a cover 102 disposed on the case body 101, wherein the cover 102 is connected to the explosion-proof case body 101 by bolts 103, and a free space is provided between the cover 102 and the upper surface of the potting layer covering the battery module 13, so as to provide a certain buffer space for the accumulation of gas pressure, and to assist the disposition of other components (e.g., a pressure sensor) to assist the enrichment of the explosion-proof function of the explosion-proof battery 10.

The case 11 may be regarded as a potting chamber, the explosion-proof case 12 connected to the case 11 may be regarded as a wiring chamber, and the case 11 and the explosion-proof case are electrically connected to each other through the first lead wire device 15 so that the battery module 13 and the power supply control module 14 are electrically connected to each other.

The explosion-proof case 12 is further provided with a second lead device 22, and the second lead device 22 is used for connecting the explosion-proof battery 10 with an external circuit.

In some embodiments of the present application, the first lead assembly 15 or the second lead assembly 22 is formed by a number of glan heads.

In some embodiments, referring to fig. 2 and 4 together, the battery module 13 is electrically connected to the electrical circuit switch unit 301 and the communication circuit switch unit 302 in the power control module 14 via the first lead wire device 15; the electric circuit switch unit 301 and the communication circuit switch unit 302 in the power supply control module 14 are electrically connected to the electric circuit and the communication circuit outside the case 11 and the explosion-proof case 12, respectively, via the second lead device 22.

The first lead device 15 or the second lead device 22 is mainly used for fastening and sealing a cable, wherein the fastening is to lock the cable through Glan, so that the cable is not subjected to axial displacement and radial rotation, the normal connection of the cable is ensured, the sealing is IP protection which is often called, namely, dust and water prevention, the first lead device 15 or the second lead device 22 can also be applied to a shielded cable waterproof connector and is suitable for the cable with a shielding layer, the armored cable waterproof connector suitable for armored cables, the explosion-proof cable waterproof connector suitable for dangerous areas such as mines and the like.

In some embodiments of the present application, referring to fig. 4, the explosion-proof battery 10 further includes:

a pressure sensor 16 provided in the case 11; a pressure relief device 17 provided on the cover 102 of the case 11 for relieving the pressure in the case 11 to the outside when the pressure in the case 11 increases.

The pressure relief device 17 may be, for example, a flame arrester, a one-way valve, or a combination of a flame arrester and a one-way valve, or the pressure relief device 17 may be, without limitation, a combination of one or more flame arresters.

The pressure sensor 16 is a device or apparatus that can sense the pressure signal and convert the pressure signal into a usable output electrical signal according to a certain rule.

a first support member 20 disposed in the case 11, the first support member 20 being used to support and fix the battery module 13; the second support piece 21 of setting among explosion-proof box 12, second support piece 21 is used for supporting and fixed power control module 14, that is to say, battery module 13 can be via first support piece 20 fixed mounting in box 11, and power control module 14 can be via second support piece 21 fixed mounting among explosion-proof box 12, thereby effectively ensured the steadiness ability of battery module 13 and the installation of power control module 14, can be convenient for battery module 13 and the heat dissipation of power control module 14 simultaneously, effectively avoid the risk that battery module 13 and power control module 14's temperature is too high to lead to, the holistic security performance of explosion-proof battery 10 has effectively been promoted from the angle of accuse temperature.

In the embodiment, by arranging the case body and the explosion-proof case body connected with the case body for the explosion-proof battery, the battery module arranged in the case body, the first potting layer covering the first area of the battery module, and a second pouring layer at least covering the second area of the battery module, wherein the first pouring layer covering the first area of the battery module and the second pouring layer at least covering the second area of the battery module are adopted to realize the pouring protection of the battery module, the explosion-proof box body is adopted to realize the explosion-proof protection of the power supply control module, the realization cost and the weight of the explosion-proof mechanism of the battery can be effectively reduced, and the explosion-proof box body is ensured to not only the poured battery module when the explosive environment occurs, other exposed conductors are not electrified, so that the contact between the fire source and the explosive gas is timely blocked, and the economy and the explosion-proof control effect of the explosion-proof mechanism are effectively improved.

It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims

1. An explosion-proof battery, comprising:

the explosion-proof box body is connected with the box body;

the battery module is arranged in the box body and comprises a first area and a second area, the first area comprises all electrodes in the battery module, and the second area comprises all pressure relief valves in the battery module;

the first pouring layer covers the first area of the battery module, and is provided with a first opening corresponding to the pressure release valve, so that the pressure release valve can exhaust gas through the first opening; and

a second potting layer at least covering the second region of the battery module, wherein the impact strength of the second potting layer is less than the impact strength of the pressure relief valve when the pressure relief valve is opened, so that the pressure relief valve breaks the second potting layer when the pressure relief valve is relieved;

the power supply control module is arranged in the explosion-proof box body;

and the first lead device is arranged between the box body and the explosion-proof box body.

2. The explosion-proof battery of claim 1 wherein the second potting layer also covers the first region and the second potting layer has a lower impact strength than the first potting layer.

3. The explosion-proof battery as defined in claim 1, further comprising:

and a third pouring layer covering the second pouring layer, wherein the third pouring layer is provided with a second opening at the position of the pressure release valve, the second opening corresponds to the pressure release valve so that the pressure release valve can exhaust gas through the second opening, and the impact strength of the third pouring layer is greater than that of the first pouring layer.

4. The explosion-proof battery of claim 3 wherein the first, second and third potting layers are silicone or epoxy.

5. The explosion-proof battery as defined in claim 1, wherein the case and the explosion-proof case comprise:

the explosion-proof box body comprises a box body and an explosion-proof box body;

the battery module pouring box comprises a box body, a box cover and an explosion-proof box cover, wherein the box body is arranged on the box body, the box cover and the explosion-proof box cover are arranged on the explosion-proof box body respectively, the box cover and the explosion-proof box cover are connected with the box body and the explosion-proof box body through bolts, and free space is reserved between the upper surface of a pouring layer of the battery module and the box cover.

6. The explosion-proof battery as set forth in claim 1, wherein,

the box body and the explosion-proof box body are electrically connected through a first lead device so that the battery module is electrically connected with the power supply control module;

and a second lead device is also arranged on the explosion-proof box body and is used for connecting the explosion-proof battery with an external circuit.

7. The explosion-proof battery as defined in claim 1, further comprising:

a pressure sensor disposed within the tank;

and the pressure relief device is arranged on the box cover of the box body and used for relieving the pressure in the box body to the outside when the pressure in the box body is increased.

8. The explosion-proof battery as defined in claim 1, further comprising:

the first supporting piece is arranged in the box body and used for supporting and fixing the battery module;

and the second supporting piece is arranged in the explosion-proof box body and is used for supporting and fixing the power supply control module.

9. The explosion-proof battery as set forth in claim 3, wherein the first potting layer, the second potting layer and the third potting layer fill the space between the battery module and the side walls and the bottom of the case body to closely adhere to the case body and fix the battery module.