CN212991232U

CN212991232U - Explosion-proof battery

Info

Publication number: CN212991232U
Application number: CN202021386134.9U
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: 2021-04-16
Anticipated expiration: 2030-07-14

Abstract

The utility model discloses an explosion-proof battery, include: 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; and the pouring body covers the battery module and is used for packaging the battery module, wherein the pouring body is provided with a pressure relief area so as to ensure that the pouring body is broken when the pressure relief valve is opened. According to the utility model discloses explosion-proof battery through the encapsulation body that sets up the cover battery module, realizes the effective isolation of potential ignition source and explosive gas, has reduced the probability of taking place extreme accidents such as burning and explosion by a wide margin.

Description

Explosion-proof battery

Technical Field

The utility model relates to a battery safety technical field, in particular to explosion-proof battery.

Background

The current high-capacity explosion-proof power supply used in underground coal mines mainly comprises 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 the GB3836 series and IEC60079 series explosion-proof standards have many limitations on the use of lead-acid storage batteries, so that the underground high-capacity storage battery power supply gradually tends to select lithium batteries. However, a large-capacity lithium battery is directly placed in a battery box, when the battery box is filled with explosive gas, the explosive gas is in contact with a potential ignition source of a battery electrode, so that great explosive danger hidden trouble exists, no good solution exists in the industry at present, and solution is needed urgently.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, the utility model aims to provide an explosion-proof battery through the encapsulation layer that sets up the cover battery module, realizes potential ignition source and explosive gas's effective isolation, has reduced the probability of taking place extreme accidents such as burning and explosion by a wide margin.

In order to achieve the above object, an embodiment of the present invention provides an explosion-proof battery, including: a 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; and

and the pouring body covers the battery module and is used for packaging the battery module, wherein the pouring body is provided with a pressure relief area so as to ensure that the pouring body is broken when the pressure relief valve is opened.

In addition, the explosion-proof battery according to the above embodiment of the present invention may further have the following additional technical features:

according to the utility model discloses an embodiment, the pouring body includes: the first pouring layer covers the first area of the battery module, the first pouring layer is provided with a first opening used as the pressure relief area, and the first opening corresponds to the pressure relief valve so that the pressure relief valve can exhaust air through the first opening; the second pouring layer covers the second area of the battery module, wherein the impact strength of the pressure relief area in the second pouring layer is smaller than the impact strength of the pressure relief valve when the pressure relief valve is opened, so that the pressure relief valve breaks through the second pouring layer when the pressure relief valve is opened, and the pressure relief area is the whole area of the second pouring layer or the area corresponding to the pressure relief valve.

According to the utility model discloses an embodiment, the second is watered the sealing layer and is still covered the battery module first is watered the sealing layer, just the impact strength of second is watered the sealing layer and is less than the impact strength of first pouring the sealing layer.

According to the utility model discloses an embodiment, foretell explosion-proof battery still includes: 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 exhausts air through the second opening, and the impact strength of the third pouring layer is greater than that of the first pouring layer.

According to the utility model discloses an embodiment, first casting layer the second casting layer with the third casting layer is silica gel or epoxy.

According to the utility model discloses an embodiment, the box is explosion-proof box or non-explosion-proof metal protection box, wherein, explosion-proof box includes: a box body; the anti-explosion cover is arranged on the box body, is connected with the box body through bolts, and covers a pouring layer of the battery module and a free space is reserved between the anti-explosion cover and the anti-explosion cover.

According to the utility model discloses an embodiment, foretell explosion-proof box still includes: the pressure detector is arranged in the box body and controls to cut off the electrical connection between the explosion-proof battery and an external circuit when detecting that the pressure in the box body is greater than a preset threshold value; and the at least one pressure relief device is arranged on the explosion-proof cover or the box body, so that when the pressure in the box body rises, the pressure is timely relieved, and the influence on the battery module is reduced.

According to the utility model discloses an embodiment, foretell explosion-proof box still includes: and the sealing strip is arranged between the explosion-proof cover and the box body.

According to the utility model discloses an embodiment, foretell explosion-proof box still includes: and the supporting piece is used for supporting and fixing the battery module.

According to the utility model discloses an embodiment, first encapsulation layer the second encapsulation layer with the third encapsulation layer is filled with battery module with the space between the lateral wall of box and the bottom, so that it with explosion-proof box body closely laminates and fixes battery module.

According to the utility model discloses explosion-proof battery through the packaging body that sets up the cover battery module to the packaging body that adopts the cover battery module encapsulates the battery module, effectively realizes the effective isolation of potential ignition source and explosive gas, has reduced the probability of taking place the extreme accident such as burning and explosion by a wide margin.

Additional aspects and advantages of the invention 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 invention.

Drawings

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

fig. 2 is a schematic structural view of an explosion-proof battery according to an embodiment of the present invention;

fig. 3 is a schematic structural view of an explosion-proof battery according to another embodiment of the present invention;

fig. 4 is a schematic structural diagram of an explosion-proof battery according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

An explosion-proof battery according to an embodiment of the present invention is described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an explosion-proof battery according to an embodiment of the present invention. As shown in fig. 1, the explosion-proof battery 10 includes: the case 100, the battery module 200, and the potting body 1000.

The battery module 200 is disposed in the case 100, wherein the battery module 200 includes a first area and a second area, the first area includes all the electrodes 201 in the battery module 200, and the second area includes all the pressure relief valves 202 in the battery module 200; the potting body 1000 covers the battery module 200, and the potting body 1000 is used to encapsulate the battery module 200, wherein the potting body 1000 is provided with a pressure relief area to ensure that the potting body 1000 is broken when the pressure relief valve 202 is opened.

The embodiment of the utility model provides an in, explosion-proof battery 10 can be the lithium cell, also can be other arbitrary possible colliery battery for the borehole operation, does not do specifically and restricts here, uses explosion-proof battery 10 to explain in detail for the lithium cell below.

It can be understood that battery module 200 can include a plurality of monomer lithium cells of spacing apart in proper order and arranging, can link to each other through electric connector between the monomer lithium cell, and the main potential ignition source of lithium cell is electrified part usually, as shown in fig. 1, the utility model discloses all electrodes 201 in well battery module 200, also be the positive negative terminal of monomer lithium cell in battery module 200, consequently, in the embodiment of the utility model, cover battery module 200 through the encapsulation body 1000, realize the encapsulation to battery module 200, can effectively avoid the battery to take place the detonation risk that probably leads to after the trouble such as thermal runaway.

According to an embodiment of the present invention, as shown in fig. 2, according to an embodiment of the present invention, a potting body 1000 includes: a first potting layer 300 and a second potting layer 400.

The first potting layer 300 covers a first area of the battery module 200, the first potting layer 300 has a first opening 203 as a pressure relief area, and the first opening 203 corresponds to the pressure relief valve 202, so that the pressure relief valve 202 can exhaust air through the first opening 203; the second potting layer 400 covers a second region of the battery module 200, wherein the impact strength of the pressure relief region in the second potting layer 400 is smaller than the impact strength of the pressure relief valve 202 when opened, so as to ensure that the pressure relief valve 202 breaks through the second potting layer 400 when opened, wherein the pressure relief region is the whole region of the second potting layer or the region corresponding to the pressure relief valve. Therefore, in the embodiment of the present invention, the first pouring layer 300 is set by covering the first region of the battery module 200, and the pressure relief valve 202 of the single battery is effectively protected by the first pouring layer 300.

In the above structural design of the explosion-proof battery 10, as shown in fig. 2, the first potting layer 300 is configured to have the first opening 203 as a pressure relief area at the second area, that is, at all the pressure relief valves 202 in the battery module 200, and the first opening 203 corresponds to the pressure relief valve 202, so that the pressure relief valve 202 can exhaust gas through the first opening 203, and the explosion risk possibly caused after the battery has a fault such as thermal runaway can be effectively avoided.

The impact strength of the second pouring layer 400 is smaller than that of the pressure release valve 202 when the pressure release valve 202 is opened, so that the second pouring layer 400 is broken when the pressure release valve 202 is opened, and under the condition that the second pouring layer 400 is broken after the pressure release valve 202 is opened, the first pouring layer 300 can still effectively protect the electrode 201 of the single lithium battery, effective isolation of a potential ignition source and explosive gas is achieved, and probability of extreme accidents such as combustion and explosion is greatly reduced.

According to an embodiment of the present invention, as shown in fig. 3, the second potting layer 400 further covers the first potting layer 300 of the battery module 200, and the impact strength of the second potting layer 400 is less than the impact strength of the first potting layer 300.

It can be understood that, as shown in fig. 3, the embodiment of the present invention can further provide a second encapsulation layer 400 covering the first encapsulation layer 300 of the battery module 200, that is, the second encapsulation layer 400 not only covers the second region, but also covers the region covered by the first encapsulation layer 300, and when the second encapsulation layer 400 protects the first encapsulation layer 300, the pressure release valve 202 is also protected, so as to achieve effective encapsulation protection.

It should be noted that, because the impact strength of the second encapsulation layer 400 is smaller than the impact strength when the pressure release valve 202 is opened, and when the pressure release valve 202 is opened and breaks through the second encapsulation layer 400, the first encapsulation layer 300 can still effectively protect the electrode 201 of the single lithium battery, so that the potential ignition source is effectively isolated from the explosive gas, and the probability of the occurrence of the extreme end accidents such as combustion and explosion is greatly reduced.

According to an embodiment of the present invention, as shown in fig. 4, the explosion-proof battery 10 further includes: a third encapsulation layer 500. The third sealing layer 500 covers the second sealing layer 400, the third sealing layer 500 has a second opening 204 at the position of the pressure release valve 202, the second opening 204 corresponds to the pressure release valve 202, so that the pressure release valve 202 can exhaust gas through the second opening 204, and the impact strength of the third sealing layer 500 is greater than that of the first sealing layer 300.

Further, according to an embodiment of the present invention, as shown in fig. 4, the first potting layer 300, the second potting layer 400 and the third potting layer 500 are filled in the space between the side walls and the bottom of the battery module 200 and the case 100, so that they are closely attached to the explosion-proof case body and fix the battery module.

Alternatively, according to an embodiment of the present invention, the first, second and

third potting layers

300, 400 and 500 may be silicone or epoxy. That is, the skilled person can set the first encapsulation layer 300, the second encapsulation layer 400 and the third encapsulation layer 500 according to the actual situation, for example, the first encapsulation layer 300 is a silicone, the second encapsulation layer 400 is an epoxy resin, and the third encapsulation layer 500 is an epoxy resin.

It can be understood that silica gel is called silicic acid gel, is a high-activity adsorption material, belongs to an amorphous substance, and has stable chemical property and no combustion because the main component of the silica gel is silicon dioxide; epoxy resin is a general name of a polymer containing more than two epoxy groups in a molecule, is a polycondensation product of epoxy chloropropane and bisphenol A or polyol, and can be subjected to ring opening by using various compounds containing active hydrogen due to the chemical activity of the epoxy groups, and a network structure is formed by curing and crosslinking, so that the epoxy resin is a thermosetting resin. Therefore, the silica gel or the epoxy resin has the characteristics of high temperature resistance, good flame retardant property, explosion resistance and the like.

The impact strength of the third sealing layer 500 is configured to be greater than the impact strength of the first sealing layer 300, so that the third sealing layer 500 can form an outermost protection and further protect the second sealing layer 400, that is, the third sealing layer 500 can further enhance the protection functions of the first sealing layer 300 and the second sealing layer 400, and due to the protection and reinforcement effects of the third sealing layer 500, the damage degree of the second sealing layer 400 can be effectively limited, that is, the damage part can be limited at the pressure release valve 202 to the greatest extent, so that the destructive influence on the first sealing layer 300 is reduced to a great extent, and the reliability of the sealing explosion-proof protection method is improved.

Optionally, according to an embodiment of the present invention, as shown in fig. 4, the box 100 may be an explosion-proof box or a non-explosion-proof metal protection box, wherein the explosion-proof box may include: a box body 101 and an explosion-proof cover 102. The box body 101 and the explosion-proof cover 102 can be made of section steel; the explosion-proof cover 102 is provided on the case body 101, the explosion-proof cover 102 is connected to the case body 101 by bolts 1021, and a free space exists between the potting layer covering the battery module 200 and the explosion-proof cover 102, so that a certain buffer space can be given to the pressure gas, and by providing the free space, it is also possible to assist in disposing some other components (e.g., a pressure detector) to assist in enriching the explosion-proof function of the explosion-proof battery 10.

Further, according to an embodiment of the present invention, as shown in fig. 4, the explosion-proof box further includes: a pressure sensor 103 and at least one pressure relief device (e.g., pressure relief device 1022). Preferably, the pressure detector 103 is provided in the case body 101; at least one pressure relief device is arranged on the explosion-proof cover 102 or the box body 101, wherein when the pressure detector 103 detects that the internal pressure of the box body is greater than a preset threshold value, the electrical connection between the explosion-proof battery 10 and an external circuit is controlled to be cut off, and meanwhile, the pressure relief device relieves pressure in time, so that the influence on the battery module 200 is reduced.

The pressure relief device may be, for example, a flame arrester, a check valve, or a combination of a flame arrester and a check valve, without limitation.

It can be understood that, as shown in fig. 4, when the battery relief valve 202 opens to exhaust, the pressure in the box body 101 increases greatly, if the pressure in the box body 101 does not discharge, a certain pressure value is reached, and explosion may occur, therefore, to ensure safety, the embodiment of the present invention may be provided with the pressure detector 103 in the box body 101 and the relief valve 1022 on the explosion-proof cover 102, so that the pressure in the box body 101 can be detected by the pressure detector 103, when the detected pressure is greater than a preset threshold, the electrical connection between the explosion-proof battery 10 and an external circuit is controlled to be cut off, and at the same time, the pressure relief device releases the pressure in time to discharge the gas in the box body 101, thereby avoiding that the gas accumulates inside the box body 101 to generate an excessive pressure to damage the box body 101 and the battery module 200, and causing no explosive extreme damage to the external environment, the explosion-proof function is realized, the explosion risk of the battery is reduced, and the safety of the explosion-proof box body and the battery is improved.

It should be noted that, in order to exhaust the gas in the box body 101 as soon as possible, the embodiment of the present invention may be provided with a plurality of pressure relief devices on the explosion-proof cover 102, wherein the above-mentioned manner of providing the pressure relief devices is only exemplary, and those skilled in the art may also provide the pressure relief devices at other positions, for example, on the box body 101.

Further, according to the utility model discloses an embodiment, foretell explosion-proof box still includes: a seal strip 600. Wherein, the sealing strip 600 is arranged between the explosion-proof cover 102 and the box body 101.

It is to be understood that the sealing tape 600 may be provided between the explosion-proof cover 102 and the case body 101 to close the gap between the explosion-proof cover 102 and the case body 101. Wherein the sealing strip 600 may include a body, at least two upper legs and at least two lower legs. Wherein, at least two last stabilizer blades are seted up respectively at the upper end of body at an interval, and at least two last stabilizer blades are stopped respectively to explosion-proof cover 102, and at least two lower stabilizer blades are seted up respectively at the lower extreme of body at an interval, and at least two lower stabilizer blades are stopped respectively to box body 101.

Therefore, by arranging the sealing strip with a plurality of upper support legs and lower support legs between the explosion-proof cover 102 and the box body 101, not only can multiple sealing between the explosion-proof cover 102 and the box body 101 be realized, but also the sealing performance between the explosion-proof cover 102 and the box body 101 can be effectively improved, and further the waterproof and dustproof performance of the explosion-proof box body is improved.

According to the utility model discloses an embodiment, foretell explosion-proof box still includes: a support 104. The support member 104 is used to support and fix the battery module 200.

It can be understood that the embodiment of the utility model provides a can set up support piece 104 in the bottom of box body 101 to support and fix battery module 200, that is to say that, battery module 200 can be via support piece 104 fixed mounting among the explosion-proof box, thereby effectively ensured battery module 200's steadiness ability, guarantee that battery module 200 can not appear rocking and the displacement, improve battery module 200 security.

According to the embodiment of the utility model provides an explosion-proof battery, through setting up the first regional first seal of watering that covers the battery module, and cover the second seal of battery module at least, realize the encapsulation protection with the first seal of watering in the first region that adopts to cover the battery module and the second seal of watering in the second region that covers the battery module at least, even destroy when the relief valve is opened under the condition of second seal of watering, the electrode of monomer lithium cell still can effectively be protected to first seal of watering, realize the effective isolation of potential ignition source and explosive gas, the probability of taking place the extreme accident such as burning and explosion has been reduced by a wide margin.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. An explosion-proof battery, comprising:

a 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; and

2. The explosion-proof battery as set forth in claim 1, wherein said potting body comprises:

the first pouring layer covers the first area of the battery module, the first pouring layer is provided with a first opening used as the pressure relief area, and the first opening corresponds to the pressure relief valve so that the pressure relief valve can exhaust air through the first opening; and

and covering the second pouring layer of the second area of the battery module, wherein the impact strength of the pressure relief area in the second pouring layer is smaller than the impact strength of the pressure relief valve when the pressure relief valve is opened so as to ensure that the pressure relief valve breaks through the second pouring layer when the pressure relief valve is opened, wherein the pressure relief area is the whole area of the second pouring layer or the area corresponding to the pressure relief valve.

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

4. The explosion-proof battery as defined in claim 2, 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.

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

6. The explosion-proof battery as defined in claim 4, wherein the case is an explosion-proof case or a non-explosion-proof metal protection case, wherein the explosion-proof case comprises:

a box body;

the anti-explosion cover is arranged on the box body, is connected with the box body through bolts, and covers a pouring layer of the battery module and a free space is reserved between the anti-explosion cover and the anti-explosion cover.

7. The explosion-proof battery as defined in claim 6, further comprising:

the pressure detector is arranged in the box body and controls to cut off the electrical connection between the explosion-proof battery and an external circuit when detecting that the pressure in the box body is greater than a preset threshold value;

and the at least one pressure relief device is arranged on the explosion-proof cover or the box body to ensure that when the internal pressure of the box body rises, the pressure is timely relieved, and the influence on the battery module is reduced.

8. The explosion-proof battery as defined in claim 6, further comprising:

and the sealing strip is arranged between the explosion-proof cover and the box body.

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

and the supporting piece is used for supporting and fixing the battery module.

10. The explosion-proof battery as claimed in claim 6, wherein the first potting layer, the second potting layer and the third potting layer fill the space between the battery module and the side wall and the bottom of the case body so as to be closely attached to the explosion-proof case body and fix the battery module.