阅读说明：本技术 防爆电池电源 (Explosion-proof battery power supply ) 是由 徐基维 张能 林豈庆 王运鹏 于 2020-10-30 设计创作，主要内容包括：本申请提出一种防爆电池电源,包括：第一箱体和第二箱体,其中,第一箱体和/或第二箱体为隔爆箱体,隔爆箱体包括箱体本体和箱盖,箱盖通过螺栓与箱体本体相连；设置在第一箱体之中的电池模组,其中,电池模组包括第一区域和第二区域,第一区域包括电池模组中所有的电极,第二区域包括电池模组中所有的泄压阀；气体处理装置,用于处理电池模组热失控过程中释放的气体；设置在第二箱体之中的电源控制模组。由此,根据本申请实施例的防爆电池电源,通过气体处理装置可以处理电池模组热失控过程中释放的气体,有效降低电池热失控释放气体对第一箱体外围环境的影响,大幅降低了发生燃烧和爆炸等极端事故的几率。(The application provides an explosion-proof battery power supply, includes: the explosion-proof box body comprises a box body and a box cover, wherein the box cover is connected with the box body through a bolt; the battery module is arranged in the first 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 gas treatment device is used for treating gas released in the thermal runaway process of the battery module; and the power supply control module is arranged in the second box body. From this, according to the explosion-proof battery power of this application embodiment, can handle the gas of battery module thermal runaway in-process release through gas treatment device, effectively reduce the influence of battery thermal runaway release gas to first box peripheral environment, reduced the probability of taking place terminal accidents such as burning and explosion by a wide margin.)

1. An explosion-proof battery power supply, comprising:

the explosion-proof box comprises a box body and a box cover, wherein the box cover is connected with the box body through a bolt;

the battery module is arranged in the first 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 gas treatment device is used for treating gas released in the thermal runaway process of the battery module; and

and the power supply control module is arranged in the second box body.

2. The explosion-proof battery power supply of claim 1, wherein said gas treatment device is disposed within said first housing or on a cover of said first housing.

3. The explosion-proof battery power supply of claim 1, wherein the gas treatment device automatically treats all or a specific component of the released gas when the gas is released during thermal runaway of the battery module.

4. The explosion-proof battery power supply of claim 1, further comprising:

the first pressure relief device is arranged between the first box body and the second box body and used for relieving the pressure in the first box body to the second box body;

and the second pressure relief device is arranged on the side wall of the second box body and is used for relieving the pressure in the second box body to the outside.

5. The explosion-proof battery power supply of claim 1, further comprising:

the pouring structure comprises a first pouring layer and a second pouring layer, the first pouring layer is used for covering the first area, the second pouring layer is used for covering the second area, and the impact strength of the second pouring layer is smaller than that of the relief valve when the relief valve is opened, so that the second pouring layer is broken when the relief valve is opened;

a free space exists between the potting structure and the tank cover.

6. The explosion-proof battery power supply of claim 1, further comprising:

a first pressure sensor disposed in the first tank;

a second pressure sensor disposed within the second tank, wherein a pressure threshold of the second pressure sensor is less than a pressure threshold of the first pressure sensor.

7. The explosion-proof battery power supply as set forth in claim 1, wherein a first lead means is further provided on said second case for electrically connecting said battery module and said power control module;

and a second lead device is further arranged on the second box body and used for enabling the power supply control module to be electrically connected with an external circuit.

8. The explosion-proof battery power supply of claim 5, 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.

9. The explosion-proof battery power supply of claim 8, further comprising: cover the third of second pouring seal layer waters the seal, wherein, the third is watered the seal and is in relief valve position department has the second opening, the second opening corresponds the relief valve, so that the relief valve can warp the second opening is carminative, the impact strength who waters the seal of third is greater than the impact strength who waters the seal, first water the seal the second water the seal with the third waters the seal and is silica gel or epoxy.

10. The explosion-proof battery power supply of claim 9, wherein the first, second and third potting layers fill the space between the battery module and the side wall and bottom of the first case so that it is tightly attached to the body of the explosion-proof case and fixes the battery module.

Technical Field

The invention relates to the technical field of batteries, in particular to an explosion-proof battery power supply.

Background

At present, the explosion-proof battery power of large capacity that uses in the pit in colliery comprises a large amount of battery cells usually, when battery cell takes place extreme trouble if thermal runaway, can produce and release a large amount of gas, the gas that exists the release is gathered in the power supply box and is caused the box because of the too big risk that takes place the explosive accident of pressure, has brought very big potential safety hazard for the safe operation of battery power, nevertheless does not have good solution in the industry of moving ahead now, awaits the solution urgently.

Disclosure of Invention

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

Therefore, the invention provides the anti-explosion battery power supply, which can process gas released in the thermal runaway process of the battery module through the gas processing device, effectively reduce the influence of the gas released by the thermal runaway of the battery on the peripheral environment of the first box body, and greatly reduce the probability of extreme accidents such as combustion and explosion.

To achieve the above object, the present invention provides an explosion-proof battery power supply, comprising: the explosion-proof box comprises a box body and a box cover, wherein the box cover is connected with the box body through a bolt; the battery module is arranged in the first 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 gas treatment device is used for treating gas released in the thermal runaway process of the battery module; and a power control module disposed in the second case.

In some embodiments, the gas treatment device is disposed within the first housing or on a lid of the first housing.

In some embodiments, when the gas is released during the thermal runaway of the battery module, the gas treatment device may automatically treat all or a specific component of the released gas.

In some embodiments, the explosion-proof battery power supply further comprises: the first pressure relief device is arranged between the first box body and the second box body and used for relieving the pressure in the first box body to the second box body; and the second pressure relief device is arranged on the side wall of the second box body and is used for relieving the pressure in the second box body to the outside.

In some embodiments, the explosion-proof battery power supply further comprises: the pouring structure comprises a first pouring layer and a second pouring layer, the first pouring layer is used for covering the first area, the second pouring layer is used for covering the second area, and the impact strength of the second pouring layer is smaller than that of the relief valve when the relief valve is opened, so that the second pouring layer is broken when the relief valve is opened; a free space exists between the potting structure and the tank cover.

In some embodiments, a first pressure sensor disposed within the first tank; a second pressure sensor disposed within the second tank, wherein a pressure threshold of the second pressure sensor is less than a pressure threshold of the first pressure sensor.

In some embodiments, a first lead device is further disposed on the second box, and the first lead device is used for electrically connecting the battery module and the power supply control module; and a second lead device is further arranged on the second box body and used for enabling the power supply control module to be electrically connected with an external circuit.

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

In some embodiments, the third encapsulation layer covers the second encapsulation layer, wherein the third encapsulation layer has 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, the impact strength of the third encapsulation layer is greater than that of the first encapsulation layer, and the first encapsulation layer, the second encapsulation layer and the third encapsulation layer are made of silica gel or epoxy resin.

In some embodiments, the first, second and third potting layers fill the space between the battery module and the side wall and the bottom of the first box body, so that the battery module is tightly attached to the body of the flameproof box body and fixed

This application is through setting up the encapsulation structure that covers battery module, and gas processing apparatus, not only realized the effective isolation of potential ignition source and explosive gas, and can handle the gas of battery module thermal runaway in-process release, effectively reduce the influence of battery thermal runaway release gas to first box peripheral environment, simultaneously still can be through setting up respectively between first box and second box and the pressure relief device on the second box, form the second grade and release, through releasing the casing that effectively reduces battery module gas outgoing's pressure destruction last level step by step when battery emergence faults such as thermal runaway lead to the relief valve to open, can not cause explosive extreme harm to external environment more, thereby the probability of taking place terminal accidents such as burning and explosion has been reduced 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

The foregoing and/or additional aspects and advantages of the present invention 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 diagram of an explosion-proof battery power supply according to a first embodiment of the present invention;

FIG. 2 is a schematic diagram of an explosion-proof battery power supply according to a second embodiment of the present invention;

FIG. 3 is a schematic diagram of an explosion-proof battery power supply according to a third embodiment of the present invention; and

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

Reference numerals:

an explosion-proof battery power supply 1, a box body 101 and a box cover 102;

the battery module comprises a first box body 10, a first pouring seal layer 11, a second pouring seal layer 12, a third pouring seal layer 13, a battery module 30, an electrode 31, a pressure release valve 32, a first support 33 and a first pressure sensor 71;

the second box 20, the first lead device 21, the second lead device 22, the power control module 40, the second support 41, the first and second pressure relief devices 50 and 60, the second pressure sensor 72, and the gas processing device 90.

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 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 illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

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

Fig. 1 is a schematic structural view of an explosion-proof battery power supply according to a first embodiment of the present invention. As shown in fig. 1, an explosion-proof battery power supply 1 according to an embodiment of the present invention includes: a first case 10, a second case 20, a battery module 30, a power control module 40, and a gas treatment device 90.

The first box 10 and/or the second box 20 are explosion-proof boxes, each explosion-proof box comprises a box body 101 and a box cover 102, and the box covers 102 are connected with the box bodies 101 through bolts so that failures such as thermal runaway of the battery modules 30 are controlled in the explosion-proof boxes through the explosion-proof function of the explosion-proof boxes, and extreme harm to the external environment of the explosion-proof boxes is avoided. Meanwhile, the box cover 102 is connected with the box body 101 through bolts, so that the battery module 30 can be replaced and maintained in time, and the production cost is saved.

And a battery module 30 disposed in the first case 10, wherein the battery module 30 includes a first region including all the electrodes in the battery module 30 and a second region including all the pressure relief valves in the battery module 30.

It should be understood that the battery module 30 may be formed by connecting single lithium batteries in series or in parallel, each single lithium battery has a positive electrode 31 and a negative electrode 31, when N single lithium batteries are disposed in the battery module 30, there are N × 2 electrodes 31, where N is an integer greater than 1, and in this case, the first region includes all the electrodes 31 in the battery module 30. Similarly, the second region includes all the pressure relief valves 32 in the battery module 30.

It should be noted that battery explosion generally refers to a failure such as thermal runaway occurring in a lithium battery, which causes a sudden increase in the internal pressure of the battery until the battery case is burst and exploded. Therefore, the large-capacity lithium battery is provided with the pressure release valve, so that when the gas pressure in the battery reaches the preset threshold value of the pressure release valve, the gas in the battery can be released to the outside of the battery by opening the pressure release valve, and the explosion of the battery is effectively avoided.

The power control module 40 is disposed in the second housing 20.

The second box 20 is further provided with a first lead device 21, and the first lead device 21 is used for electrically connecting the battery module 30 and the power control module 40.

As a possible embodiment, a second lead device 22 may be further disposed on the second case 20, and the second lead device 22 is used to electrically connect the power control module 40 with an external circuit, so as to connect the battery module with the external circuit.

Wherein the first and second lead means 21, 22 may consist of one or more glan heads.

Since the battery module 30 discharges the gas generated inside to the outside of the battery module 30 through the relief valve 32, however, since the first case 10 is a sealed structure, the gas pressure inside the first case 10 also gradually increases as the gas of the battery module 30 continuously increases, which causes an explosion risk.

Referring to fig. 1 and 2, in order to further ensure the safety of the first box 10 and the battery module 30, in the structural design of the explosion-proof battery power supply 1, in the embodiment of the present application, a gas processing device 90 is further provided to process the gas released during the thermal runaway process of the battery module 30, wherein the gas processing device 90 may be disposed in the first box 10, may also be mounted on a wall of a free space portion in the first box 10, and may also be disposed on a box cover 102 of the first box 10 (as shown in fig. 2), when the battery module 30 in the first box 10 releases hydrogen, methane, ethylene, carbon monoxide, carbon dioxide, and other gases during the thermal runaway process, the gas processing device 90 may process the gases by the principle of physical adsorption, and may also process the gases by a chemical reaction, so as to achieve the purpose that the gas processing device 90 automatically processes all components or specific components in the released gases, thereby effectively reducing the influence of the battery thermal runaway release gas on the peripheral environment of the first box body and greatly reducing the probability of extreme end accidents such as combustion, explosion and the like.

In order to prevent the gas that is not completely processed by the gas processing apparatus from accumulating in the first tank 10 to generate excessive pressure, in one embodiment of the present application, as shown in fig. 3, the explosion-proof battery power supply 1 may further include: a first pressure relief device 50 and a second pressure relief device 60 disposed in the second case 20, wherein the first pressure relief device 50 and the second pressure relief device 60 are disposed on the case body 101. The first pressure relief device 50 is adapted to communicate with the first tank 10 to relieve the pressure in the first tank 10 to the second tank 20, and the second pressure relief device 60 is adapted to communicate with the outside to relieve the pressure in the second tank 20 to the outside.

Because battery module 30 discharges the gas that its inside produced to the outside of battery module 30 through relief valve 32, when the gas processing apparatus can not handle the release gas completely, because first box 10 is seal structure, and gas along with battery module 30 lasts and increases, can make the gas pressure in the first box 10 also crescent, has the explosion risk. Therefore, the first pressure relief device 50 is further arranged between the first box 10 and the second box 20 in the embodiment of the application, so that the pressure in the first box 10 can be relieved into the second box 20, and the risk of explosion of the first box 10 is effectively reduced. Meanwhile, the buffer space formed by the second box body 20 effectively reduces the pressure of the gas to be discharged and reduces the overall explosion danger of the explosion-proof battery power supply.

Further, this application still sets up second pressure relief device 60 on the box body 101 of second box 20 for the gas that is not handled by gas treatment device completely can finally be discharged to the outside of explosion-proof battery power 1 through second pressure relief device 60, promptly, makes the gas that battery module 30 produced loop through relief valve 32, gas treatment device 90, first pressure relief device 50 and second pressure relief device 60 and finally discharges to the outside of explosion-proof battery power.

When the gas released during the thermal runaway process of the battery module 30 is completely processed by the gas processing device 90, the embodiment of the present application may not require pressure relief through the first pressure relief device 50 and the second pressure relief device 60.

In an embodiment of the present application, the first and second pressure relief devices 50, 60 may be a valve block consisting of one or more check valves and/or flame arrestors.

In some embodiments, as shown in fig. 4, the explosion-proof battery power supply 1 further comprises an encapsulation structure, wherein the encapsulation structure comprises a first encapsulation layer 11 and a second encapsulation layer 12, the first encapsulation layer 11 is used for covering a first area, the second encapsulation layer 12 is used for covering a second area, and the impact strength of the second encapsulation layer 12 is smaller than that of the pressure relief valve 32 when the pressure relief valve 32 is opened, so that the second encapsulation layer is broken when the pressure relief valve 32 is opened.

It should be noted that, since the potential ignition source in the battery is an electrified component, that is, the electrode 31 in the battery module 30, the first area of the battery module 30 is covered by the first potting layer 11, that is, all the electrodes 31 in the battery module 30 are isolated from the gas outside the battery module 30 by the first potting layer 11, so that the electrodes 31 in the battery module 30 are effectively prevented from generating electric sparks to ignite the explosive gas in the surrounding environment, thereby causing an explosive hazard.

And the second seals 12 protects all relief valves 32 in the battery module 30 to prevent that the relief valves 32 from being influenced by the outside destruction of battery module 30, and then influence the inside pressure environment of battery module 30, cause the battery blasting, effectively improve the reliability of battery module.

Meanwhile, the second pouring sealing layer 12 and the pressure release valve 32 can be broken by the gas generated inside the battery module 30, that is, the second pouring sealing layer 12 and the pressure release valve 32 can be broken when the pressure inside the battery module 30 sharply increases, so that the gas inside the battery module 30 is released to the outside of the battery module 30, the gas inside the battery module 30 is prevented from continuously increasing, and explosion is caused.

Alternatively, the second potting layer 12 may cover the first region in order to further isolate the electrodes 31 in the battery module 30.

The impact strength of the second potting layer 12 is less than that of the first potting layer 11, so that the second potting layer 12 can be easily broken by gas inside the battery module 30, and the purpose of gas release is achieved.

In some embodiments, the explosion-proof battery power supply 1 further comprises a third potting layer 13, wherein the third potting layer 13 covers the second potting layer 12.

The third pouring layer 13 is provided with a second opening at the pressure release valve 32, the second opening corresponds to the pressure release valve 32, so that the pressure release valve 32 can exhaust gas through the second opening, the impact strength of the third pouring layer 13 is greater than that of the first pouring layer 11, and the first pouring layer 11, the second pouring layer 12 and the third pouring layer 13 are made of silica gel or epoxy resin.

That is to say, this application can effectively restrict the degree of damage to second encapsulation layer 12 when relief valve 32 is opened through set up third encapsulation layer 13 in the outside of second encapsulation layer 12, namely, makes the destruction part can be restricted in relief valve department by the at utmost, effectively reduces the destruction influence to first encapsulation layer 11, has improved the reliability of encapsulation protection.

Further, the first pouring layer 11, the second pouring layer 12 and the third pouring layer 13 are filled in the space between the battery module 30 and the side wall and the bottom of the first box 10, so that the battery module is tightly attached to the explosion-proof box body and fixes the battery module 30, and the battery module is prevented from being collided when the explosion-proof battery power supply 1 is moved, and unnecessary reaction is caused in the battery module 30.

Note that the encapsulation of the explosion-proof battery power supply 1 according to the embodiment of the present application is not limited to the three-layer encapsulation, and for example, only one layer encapsulation may be provided, two layers encapsulation may be provided, or three layers encapsulation may be provided.

Further, the explosion-proof battery power supply 1 further includes a first pressure sensor 71 and a second pressure sensor 72.

Wherein the first pressure sensor 71 is disposed in the first tank 10, the second pressure sensor 72 is disposed in the second tank 30, and a pressure threshold of the second pressure sensor 72 is smaller than that of the first pressure sensor 71.

Specifically, because the pressure threshold of second pressure sensor 72 is less than the pressure threshold of first pressure sensor 71, consequently, make gas enter into second box 20 through first pressure relief device 50, receive the pressure after the buffering decompression of second box 20, still can reach the pressure threshold who triggers second pressure sensor 72, improve pressure detection's accuracy nature, when guaranteeing that box internal pressure risees, power control module group can in time cut off the connection between explosion-proof battery power and the external circuit, reduce the explosion hidden danger of explosion-proof battery power in the at utmost.

Further, there is free space 14 between the encapsulation layer that covers battery module 30 and the case lid to the production gas after for relief valve 32 opens provides the buffer zone, avoids causing explosion accident etc. to take place for the explosion proof box.

Further, the explosion-proof battery power supply 1 further includes a first support 33 disposed in the first casing 10, the first support 33 being used for supporting and fixing the battery module 30, a second support 41 disposed in the second casing 20, the second support 41 being used for supporting and fixing the power control module 40.

To sum up, this application can effectively handle the gas of battery module thermal runaway in-process release through gas processing apparatus, effectively reduces the influence of battery thermal runaway release gas to first box peripheral environment, has reduced the probability of taking place extreme accident such as burning and explosion by a wide margin. And, this application waters the electrode of sealing to battery module through first sealing and second and covers, effectively realize the isolation to the electrode, because of producing the electric spark emergence accident of catching fire when avoiding battery module electrode and ambient gas to contact, and simultaneously, this application is through setting up pressure relief device between first box and second box and on the second box respectively, form the second grade and release, through releasing the pressure that effectively reduces battery module gas outgoing and produce step by step when the battery takes place trouble such as thermal runaway and leads to the relief valve to open, prevent to destroy the casing of last one deck level, can not cause explosive extreme harm to external environment more.

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.

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.