CN212991230U

CN212991230U - Explosion-proof battery

Info

Publication number: CN212991230U
Application number: CN202021384560.9U
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: 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 a package body covering the battery module, for packaging the battery module. According to the utility model discloses explosion-proof battery through the packaging 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 GB 3836 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 a package body covering the battery module, for packaging the battery module.

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 packaging body includes: 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 air through the first opening; and covering the battery module, wherein the battery module comprises a second pouring layer of the top area including the second area, and 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 as to ensure that the pressure release valve breaks the second pouring layer when opened.

According to the utility model discloses an embodiment, the second is watered the sealing layer and is still covered 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, first casting layer with second 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 battery 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 with second encapsulation layer fills up and is full of 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.

Detailed Description

Reference will now be made in detail to 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 function 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: case 100, battery module 200, and package 1000.

Wherein the battery module 200 is disposed in the case 100, the battery module 200 includes a first region and a second region, the first region includes all the electrodes 201 in the battery module 200, and the second region includes all the pressure relief valves 202 in the battery module 200; the package body 1000 covers the battery module 200, and the package body 1000 is used to package the battery module 200.

In the embodiment of the present invention, the explosion-proof battery 10 can be a lithium battery, and can also be any other rechargeable battery, which is not specifically limited herein, and the following explosion-proof battery 10 is elaborated as a lithium battery.

It can be understood that battery module 200 can include a plurality of monomer lithium batteries of spacing apart in proper order and arrange, can link to each other through electric connector between the monomer lithium battery, and the main potential ignition source of lithium battery 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 battery in battery module 200, consequently, in the embodiment of the utility model, cover battery module 200 through packaging 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, the package body 1000 includes: a first potting layer 300 and a second potting layer 400.

The first sealing layer 300 covers a first area of the battery module 200, the first sealing layer 300 has a first opening 301, and the first opening 301 corresponds to the pressure release valve 202, so that the pressure release valve 202 can release air through the first opening 301; the second potting layer 400 covers the top area of the battery module 200 including the second area, as shown in fig. 2, the top area of the battery module 200 includes the second area and the potting area of the first potting layer 300 covering all the electrodes of the battery module 200, wherein the impact strength of the second potting layer 400 is smaller than the impact strength when the pressure release valve 202 is opened, so as to ensure that the second potting layer 400 is burst when the pressure release valve 202 is opened.

Therefore, in the present embodiment, the first potting layer 300 is disposed in the first area of the battery module 200 in a covering manner, so that the first potting layer 300 effectively protects the part of the relief valve 202 of the unit battery.

In the above structural design of the explosion-proof battery 10, as shown in fig. 2, in the second region, that is, at all the pressure release valves 202 in the battery module 200, the first potting layer 300 is configured to have the first opening 301, and the first opening 301 corresponds to the pressure release valve 202, so that the pressure release valve 202 can exhaust gas through the first opening 301, and the risk of knocking 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. Therefore, by arranging the first potting layer 300 covering the first area of the battery module 200 and the second potting layer 400 covering the second area of the battery module 200, potting protection is realized by adopting the first potting layer 300 covering the first area of the battery module 100 and the second potting layer 400 covering the top area including the second area of the battery module 100, even if the second potting layer 400 is broken when the pressure release valve 202 is opened, the first potting layer 300 can still cover the electrode 201 of the single lithium battery, effective isolation of a potential ignition source and explosive gas is realized, and the probability of occurrence of end accidents such as combustion and explosion is greatly reduced.

According to an embodiment of the present invention, as shown in fig. 3, the second sealing layer 400 further covers the first sealing layer, and the impact strength of the second sealing layer 400 is smaller than the impact strength of the first sealing layer 300.

It can be understood that, as shown in fig. 3, the embodiment of the present invention further provides the second encapsulation layer 400 that still covers 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 protection of the first encapsulation layer 300 is realized by the second encapsulation layer 400, the pressure release valve 202 is also partially protected, so as to realize 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, the pressure release valve 202 can break the second encapsulation layer 400 when releasing pressure, and the first encapsulation layer 300 can still cover the electrode 201 of the single lithium battery under the condition that the second encapsulation layer 400 is damaged after the pressure release valve 202 is opened, so that the potential ignition source is effectively isolated from the explosive gas, and the probability of the occurrence of extreme end accidents such as combustion and explosion is greatly reduced.

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

second potting layers

300 and 400 may be a silicone or an epoxy. That is, the skilled person can arrange the first encapsulation layer 300 and the second encapsulation layer 400 according to practical situations, for example, the first encapsulation layer 300 is a silicone, and the second encapsulation layer 400 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.

According to an embodiment of the present invention, the first and

second potting layers

300 and 400 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 200.

According to an embodiment of the present invention, as shown in fig. 3, the box 100 is an explosion-proof box or a non-explosion-proof metal protection box, wherein the explosion-proof box includes: a case body 101 and an explosion-proof cover 102. The explosion-proof cover 102 of the box body 101 can be made of profile steel; the explosion-proof cover 102 is provided on the case body 101, wherein 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 accumulation of the pressure gas, and by providing the free space, it is also possible to assist the disposition of some other component (e.g., a pressure detector) to assist the enrichment of the explosion-proof function of the explosion-proof battery 10.

Further, according to an embodiment of the present invention, as shown in fig. 3, the explosion-proof box further includes: a pressure detector 103 and at least one pressure relief device (e.g., pressure relief device 104). 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. 3, 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 reaches a certain pressure value, an 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 104 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 the pressure relief device performs pressure relief in time to exhaust the gas in the box body 101, thereby avoiding the gas accumulation inside the box body 101 to generate an excessive pressure to destroy the box body 101 and the battery module 200, and causing no explosive extreme hazard 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.

According to the utility model discloses an embodiment, foretell explosion-proof box still includes: a sealing strip 500. Wherein, the sealing strip 500 is arranged between the explosion-proof cover 102 and the box body 101.

It is understood that the sealing tape 500 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 500 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, the sealing strip 500 with the plurality of upper supporting legs and the plurality of lower supporting legs is arranged between the explosion-proof cover 102 and the box body 101, so that multiple sealing between the explosion-proof cover 102 and the box body 101 can be realized, the sealing performance between the explosion-proof cover 102 and the box body 101 can be effectively improved, and the waterproof and dustproof performance of the explosion-proof box body is further improved.

According to an embodiment of the present invention, as shown in fig. 3, the above-mentioned explosion-proof battery further includes: a support member 105. The support member 105 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 105 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 105 fixed mounting among the explosion-proof box, thereby has effectively ensured battery module 200's steadiness ability, guarantees that battery module 200 can not appear rocking, improves 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, the second that covers the second region of battery module waters the seal, with the first regional first seal of watering that adopts to cover the battery module and the second that covers the battery module top region including the second region are watered the seal and are realized the encapsulation protection, even destroy the second when the relief valve is opened under the condition of watering the seal, the first electrode that waters the seal and still can effectively protect the monomer lithium cell, realize the effective isolation of potential ignition source and explosive gas, the probability of taking place terminal accidents 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

and the packaging body is used for packaging the battery module.

2. The explosion-proof battery of claim 1 wherein the package body comprises:

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 air through the first opening;

and covering the battery module, wherein the battery module comprises a second pouring layer of the top area including the second area, and 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 as to ensure that the pressure release valve breaks the second pouring layer when opened.

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

4. The explosion-proof battery of claim 2 wherein the first and second potting layers are silicone or epoxy.

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

6. The explosion-proof battery as set forth in claim 5, 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.

7. The explosion-proof battery as set forth in claim 5, further comprising:

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

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

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

9. The explosion-proof battery as set forth in claim 5, wherein the first and second potting layers fill the space between the battery module and the side walls and bottom of the case to closely fit the explosion-proof case body and fix the battery module.