CN212991234U - Explosion-proof battery - Google Patents

Abstract

The utility model discloses an explosion-proof battery, include: the device comprises a first box body, a second box body and a third box body; the first battery module is arranged in the first box body and comprises a first area and a second area; the second battery module is arranged in the second box body and comprises a third area and a fourth area; the first pressure relief device is arranged between the first box body and the third box body and used for relieving the pressure in the first box body to the third box body; the second pressure relief device is arranged between the second box body and the third box body and used for relieving the pressure in the second box body to the third box body; and the third pressure relief device is arranged in the third box body and used for relieving the pressure in the third box body to the outside so as to realize the explosion-proof protection of the battery module.

Description

Explosion-proof battery

Technical Field

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

Background

With the increasing demand for the capacity of storage batteries and the decreasing demand for the volume of various electronic and electrical devices used in explosive mixture environments, the current industrial production tends to select lithium ion batteries with higher energy density. However, the higher the energy density of the battery, the more factors affecting the safety of use, and therefore, the requirements for explosion protection of lithium ion batteries used in explosive mixture environments are also more stringent.

Disclosure of Invention

The present invention aims at solving at least one of the technical problems in the above-mentioned technology to a certain extent.

Therefore, an object of the present invention is to provide an explosion-proof battery to realize the explosion-proof protection of the battery module.

In order to achieve the above object, the utility model provides an explosion-proof battery, include: the device comprises a first box body, a second box body and a third box body; the first battery module is arranged in the first box body and comprises a first area and a second area; the second battery module is arranged in the second box body and comprises a third area and a fourth area; the power supply control module is arranged in the third box body; the first pressure relief device is arranged between the first box body and the third box body and used for relieving the pressure in the first box body to the third box body; the second pressure relief device is arranged between the second box body and the third box body and used for relieving the pressure in the second box body to the third box body; and the third pressure relief device is arranged in the third box body and used for relieving the pressure in the third box body to the outside.

The utility model discloses an explosion-proof battery, can be through respectively between first box and third box, between second box and the third box and set up pressure relief device on the third box, form the second grade and release, through releasing the pressure that effectively reduces first battery module and second battery module gas outgoing and produce step by step when battery trouble such as thermal runaway 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 addition, battery among the explosion-proof battery falls into two modules and places in the box of difference, can improve explosion-proof battery's factor of safety greatly.

In addition, according to the present invention, the explosion-proof battery can also have the following additional technical features:

further, the second region includes all pressure relief valves in the first battery module; the fourth region includes all the pressure relief valves in the second battery module.

Specifically, the first potting layer covers the first area of the first battery module, and the first potting layer has a first opening corresponding to the pressure release valve of the first battery module, so that the pressure release valve of the first battery module can release gas through the first opening; a second potting layer at least covering the second area of the first battery module, wherein the impact strength of the second potting layer is less than the impact strength of the first battery module when the pressure release valve is opened, so that the pressure release valve of the first battery module breaks the second potting layer when opened; a third potting layer covering the third area of the second battery module, the third potting layer having a second opening corresponding to the pressure relief valve of the second battery module, such that the pressure relief valve of the second battery module can vent gas through the second opening; and a fourth pouring layer at least covering the fourth area of the second battery module, wherein the impact strength of the fourth pouring layer is smaller than the impact strength of the second battery module when the pressure release valve is opened, so that the pressure release valve of the second battery module breaks the fourth pouring layer when opened.

Specifically, the second pouring layer also covers the first area, and the impact strength of the second pouring layer is smaller than that of the first pouring layer; the fourth pouring layer also covers the third area, and the impact strength of the fourth pouring layer is smaller than that of the third pouring layer.

Further, the above-mentioned explosion-proof battery further includes: a fifth pouring layer covering the second pouring layer, wherein the fifth pouring layer is provided with a third opening at the position of the pressure release valve of the first battery module, the third opening corresponds to the pressure release valve of the first battery module, so that the pressure release valve of the first battery module can exhaust gas through the third opening, and the impact strength of the fifth pouring layer is greater than that of the first pouring layer; cover the sixth of fourth encapsulation layer waters the encapsulation layer, wherein, the sixth is watering the encapsulation layer and is in the relief valve position department of second battery module has the fourth opening, the fourth opening corresponds the relief valve of second battery module, so that the relief valve of second battery module can pass through the fourth opening is carminative, the impact strength of sixth encapsulation layer is greater than the impact strength of third encapsulation layer, wherein, first encapsulation layer the second encapsulation layer the third encapsulation layer the fourth encapsulation layer the fifth encapsulation layer with the sixth encapsulation layer is silica gel or epoxy.

Further, the above-mentioned explosion-proof battery further includes: a first pressure sensor disposed in the first tank; a second pressure sensor disposed in the second tank; a third pressure sensor disposed within the third tank, wherein a pressure threshold of the third pressure sensor is less than pressure thresholds of the first and second pressure sensors.

Specifically, first box, second box and third box are explosion-proof box, explosion-proof box includes: a box body; the explosion-proof cover is arranged on the box body, and the explosion-proof cover is connected with the box body through a bolt.

Further, the above-mentioned explosion-proof battery further includes: the first box body and the third box body are electrically connected through a first lead device, so that the first battery module is electrically connected with the power supply control module; the second box body and the third box body are electrically connected through a second lead device, so that the second battery module is electrically connected with the power supply control module; and a third lead device is arranged on the third box body so that the power supply control module is electrically connected with an external circuit.

Specifically, free spaces exist between the pouring layers covering the first battery module and the second battery module and the explosion-proof cover respectively.

Further, the above-mentioned explosion-proof battery further includes: the first supporting piece is arranged in the first box body and used for supporting and fixing the first battery module; the second supporting piece is arranged in the second box body and used for supporting and fixing the second battery module; and the third supporting piece is arranged in the third box body and is used for supporting and fixing the power supply control module.

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 above 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 structural view of an explosion-proof battery according to a first embodiment of the present invention;

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

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

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

fig. 5 is a schematic structural view of an explosion-proof battery according to a fifth embodiment of the present invention;

fig. 6 is a schematic structural view of an explosion-proof battery according to a sixth embodiment of the present invention;

fig. 7 is a schematic structural view of an explosion-proof battery according to a seventh embodiment of the present invention;

fig. 8 is a schematic structural view of an explosion-proof battery according to an eighth embodiment of the present invention;

reference numerals: an explosion-proof battery 1000, a box body 101 and an explosion-proof cover 102;

the battery module comprises a first box 100, a first battery module 110, a first pouring seal layer 120, a second pouring seal layer 130, a fifth pouring seal layer 140, a first pressure sensor 150, a first support 160, an electrode 11 and a pressure release valve 12;

the second box 200, the second battery module 210, the third potting layer 220, the fourth potting layer 230, the sixth potting layer 240, the second pressure sensor 250, the second support 260, the electrode 21 and the pressure relief valve 22;

the third box 300, the power control module 310, the first pressure relief device 400, the second pressure relief device 500, the third pressure relief device 320, the first lead device 600, the second lead device 700, the third pressure sensor 330, and the third support 340.

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.

The following describes an explosion-proof battery according to an embodiment of the present invention with reference to the drawings.

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

As shown in fig. 1, the explosion-proof battery 1000 according to the embodiment of the present invention may include: the battery pack includes a first case 100, a second case 200, a third case 300, a first battery module 110, a second battery module 210, a power control module 310, a first pressure relief device 400, a second pressure relief device 500, and a third pressure relief device 320.

The first battery module 110 is disposed in the first case 100, and the first battery module 110 includes a first region and a second region. The second battery pack 210 is disposed in the second case 200, and the second battery module 210 includes a third region and a fourth region.

Further, as shown in fig. 1, the first region may include all of the electrodes 11 in the first battery module 110, the second region may include all of the pressure release valves 12 in the first battery module 110, the third region may include all of the electrodes 21 in the second battery module 210, and the fourth region may include all of the pressure release valves 22 in the second battery module 210.

It should be understood that the first battery module 110 and the second battery module 210 may include a battery pack, wherein the battery pack may be formed by connecting single lithium batteries in series or in parallel. Any single lithium battery has positive and negative electrodes, and when N single lithium batteries are disposed in the battery module, there are N × 2 electrodes, where N is an integer greater than 1, for example, the first region includes all the electrodes 11 in the first battery module 110, and the third region includes all the electrodes 21 in the second battery module 210. Similarly, the second region includes all the pressure release valves 12 in the first battery module 110, and the fourth region includes all the pressure release valves 22 in the second battery module 210.

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 310 may be disposed in the third housing 300, and it should be noted that the power control module 310 is electrically connected to the first battery module 110 and the second battery module 210, and the battery control module 310 is used for controlling and monitoring the charging and discharging states of the first battery module 110 and/or the second battery module 210.

In an embodiment of the present invention, as shown in fig. 2, the explosion-proof battery 1000 further includes a first lead device 600, and the first battery module 110 and the power control module 310 are electrically connected through the first lead device 600 between the first case 100 and the third case 300. For example, the electric control wire between the power control module 310 and the first battery module 110 passes through the case between the first case 100 and the third case 300 through the first lead device 600.

It should be understood that the third casing 300 may be further provided with a third lead device (not shown) communicating with the outside so as to electrically connect the power control module 310 with an external circuit, wherein the external circuit may be a control circuit of an electric device, so that the power control module 310 can control charging and discharging of the first battery module 110 and/or the second battery module 210 according to a power demand.

Wherein the first lead assembly 600 and the third lead assembly may be comprised of one or more glan heads.

The first pressure relief device 400 is disposed between the first tank 100 and the third tank 300, and is used to relieve the pressure in the first tank 100 to the third tank 300.

The third pressure relief device 320 is disposed in the third tank 300, and is used for relieving the pressure in the third tank 300 to the outside.

Specifically, although the first battery module 110 discharges the gas generated inside to the outside of the first battery module 110 through the pressure release valve 12, since the first casing 100 is a sealed structure, the gas pressure inside the first casing 100 gradually increases as the gas of the first battery module 110 continuously increases, thereby risking explosion. Therefore, the utility model discloses set up first pressure relief device 400 between first box 100 and third box 300 for pressure in first box 100 can be released to in the third box 300, effectively reduces the risk of first box 100 explosion. Meanwhile, the buffer space formed by the third box body 300 effectively reduces the pressure of the gas to be discharged and reduces the overall explosion danger of the explosion-proof battery.

Further, the utility model discloses still set up third pressure relief device 320 in third box 300 for the gas that first battery module 110 produced can finally be released to the outside of explosion-proof battery 1000 through third pressure relief device 320, promptly, make the gas that first battery module 110 produced loop through relief valve 12, first pressure relief device 400 and the outside that explosion-proof battery 1000 was finally discharged to third pressure relief device 320, effectively prevent explosion-proof battery 1000 from exploding.

Further, the power control module 310 may be electrically connected to the second battery module 210, and the battery control module 310 is used for controlling and monitoring the charging/discharging state of the second battery module 210.

In an embodiment of the present invention, as shown in fig. 3, the explosion-proof battery 1000 further includes a second lead device 700, and the second battery module 210 and the power control module 310 are electrically connected through the second lead device 700 between the second case 200 and the third case 300. For example, the electric control line between the power control module 310 and the second battery module 210 passes through the case between the second case 200 and the third case 300 through the second lead device 700.

The second pressure relief device 500 is disposed between the second tank 200 and the third tank 300, and is used for relieving the pressure in the second tank 200 to the third tank 300, and the third tank 300 is relieved to the outside through the third pressure relief device 320.

Specifically, the second battery module 210 discharges the gas generated inside to the outside of the second battery module 210 through the relief valve 22, but since the second casing 200 is a sealed structure, the gas pressure inside the second casing 200 also gradually increases as the gas of the second battery module 210 continuously increases, thereby risking explosion. Therefore, the utility model discloses still set up second pressure relief device 500 between second box 200 and third box 300 for in the pressure in second box 200 can be released to third box 300, effectively reduce the risk of second box 200 explosion. Meanwhile, the buffer space formed by the third box body 300 effectively reduces the pressure of the gas to be discharged and reduces the overall explosion danger of the explosion-proof battery.

Further, the utility model discloses still set up third pressure relief device 320 in third box 300 for the gas that second battery module 210 produced can finally be released to the outside of explosion-proof battery 1000 through third pressure relief device 320, promptly, makes the gas that second battery module 210 produced loop through relief valve 22, second pressure relief device 500 and the outside that third pressure relief device 320 finally discharged to explosion-proof battery 1000, effectively prevents explosion-proof battery 1000 from exploding.

It should be noted that the first pressure relief device 400, the second pressure relief device 500, and the third pressure relief device 320 described in the above embodiments may each be a valve block consisting of one or more check valves and/or flame arrestors.

The embodiment of the utility model provides an in, can be through respectively between first box and third box, between second box and the third box and set up pressure relief device on the third box, form the second grade and release, with through releasing the casing that effectively reduces first battery module and the gaseous exhaust pressure of second battery module and destroy last level step by step, can not cause explosive extreme harm to external environment more, in addition, battery among the explosion-proof battery falls into two modules and places in the box of difference, can improve explosion-proof battery's factor of safety greatly, and the battery module is through pouring the back of sealing, in case go out the problem just must change whole module, therefore, fall into two modules with the battery and place and water and seal in the box of difference, the battery quantity of single module has effectively been separated, can effectively reduce the loss cost.

It should be noted that, the smaller the number of the single batteries which are sealed together by casting, the lower the capacity of the sealing module is, and the higher the safety coefficient is, so that the safety coefficient of the explosion-proof battery can be greatly improved by dividing the battery in the explosion-proof battery into two modules which are placed in different boxes for sealing by casting.

In an embodiment of the present invention, as shown in fig. 4, the explosion-proof battery 1000 may further include: a first potting layer 120, a second potting layer 130, a third potting layer 220, and a fourth potting layer 230.

The first potting layer 120 is used to cover a first area of the first battery module 110, and the first potting layer 120 has a first opening corresponding to the pressure release valve 12 of the first battery module 110, so that the pressure release valve 12 of the first battery module 110 can release air through the first opening.

It should be noted that, because the potential ignition source is the electrified part in the battery, namely, electrode 11 in first battery module 110, the utility model discloses a first regional cover of first battery module 110 of pouring seal 120, promptly, all electrodes 11 are kept apart through first pouring seal 120 and the outer gas of first battery module 110 in first battery module 110 to effectively prevent that electrode 11 in first battery module 110 from producing the electric spark and then lighting the explosive gas in the surrounding environment and thereby causing explosive hazard accident.

The second potting layer 130 covers at least a second area of the first battery module 110, wherein the impact strength of the second potting layer 130 is smaller than the impact strength of the first battery module 110 when the pressure release valve 12 is opened, so that the pressure release valve 12 of the first battery module 110 breaks the second potting layer 130 when opened.

The utility model discloses an in the embodiment, accessible second waters sealing layer 130 and protects all relief valves 12 in first battery module 110 to prevent that relief valve 12 from being broken by the outside power from first battery module 110, thereby influence the inside pressure environment of first battery module 110, cause the battery blasting, effectively improve battery module's reliability.

In addition, the second potting layer 130 and the pressure release valve 12 can be broken by the gas generated inside the first battery module 110, that is, the second potting layer 130 and the pressure release valve 12 can be broken when the pressure inside the first battery module 110 is sharply increased, so that the gas inside the first battery module 110 is released to the outside of the first battery module 110, and the gas inside the first battery module 110 is prevented from being continuously increased to cause explosion.

Alternatively, in order to further isolate the electrodes 11 in the first battery module 110, the second potting layer 130 may cover the first region. The impact strength of the second potting layer 130 is less than that of the first potting layer 120, so that the second potting layer 130 can be easily broken by the gas inside the first battery module 110, and the purpose of gas release is achieved.

The third potting layer 220 is used for covering a third area of the second battery module 210, and the third potting layer 220 has a second opening corresponding to the pressure release valve 22 of the second battery module 210, so that the pressure release valve 22 of the second battery module 210 can release air through the second opening.

It should be noted that, because the potential ignition source is the electrified part in the battery, namely, electrode 21 in the second battery module 210, the utility model discloses a third zone that third seals 220 with second battery module 210 covers, promptly, all electrodes 21 in the second battery module 210 are through the gas isolation outside third seals 220 and the second battery module 210 of watering to effectively prevent that electrode 21 in the second battery module 210 from producing the electric spark and then lighting the explosive gas in the surrounding environment and thereby causing explosive hazard accident.

The fourth potting layer 230 covers at least a fourth area of the second battery module 210, wherein the impact strength of the fourth potting layer 230 is smaller than the impact strength of the second battery module 210 when the pressure relief valve 22 is opened, so that the pressure relief valve 22 of the second battery module 210 breaks through the fourth potting layer 230 when being opened.

The utility model discloses an in the embodiment, accessible fourth seals 230 protects all relief valves 22 in to second battery module 210 to prevent that relief valve 22 from being broken by the outside power from second battery module 210, thereby influence the inside pressure environment of second battery module 210, cause the battery blasting, effectively improve battery module's reliability.

In addition, the fourth potting layer 230 and the pressure release valve 22 can be broken by the gas generated inside the second battery module 210, that is, the fourth potting layer 230 and the pressure release valve 22 can be broken when the pressure inside the second battery module 210 is sharply increased, so that the gas inside the second battery module 210 is released to the outside of the second battery module 210, and the gas inside the second battery module 210 is prevented from being continuously increased to cause explosion.

Alternatively, to further isolate the electrodes 21 in the second battery module 210, the fourth potting layer 230 may cover the third region. The impact strength of the fourth encapsulation layer 230 is less than that of the third encapsulation layer 220, so that the fourth encapsulation layer 230 can be easily broken by the gas inside the second battery module 210, and the purpose of gas release is achieved.

In an embodiment of the present invention, as shown in fig. 5, the explosion-proof battery 1000 may further include: a fifth potting layer 140 and a sixth potting layer 240.

The fifth sealing layer 140 covers the second sealing layer 130, the fifth sealing layer 140 has a third opening at the position of the pressure release valve 12 of the first battery module 110, the third opening corresponds to the pressure release valve 12 of the first battery module 110, so that the pressure release valve 12 of the first battery module 110 can exhaust gas through the third opening, and the impact strength of the fifth sealing layer 140 is greater than the impact strength of the first sealing layer 120.

The sixth pouring layer 240 covers the fourth pouring layer 230, the sixth pouring layer 240 has a fourth opening at the position of the pressure release valve 22 of the second battery module 210, the fourth opening corresponds to the pressure release valve 22 of the second battery module 210, so that the pressure release valve 22 of the second battery module 210 can exhaust through the fourth opening, and the impact strength of the sixth pouring layer 240 is greater than that of the third pouring layer 220, wherein the first pouring layer 120, the second pouring layer 130, the third pouring layer 220, the fourth pouring layer 230, the fifth pouring layer 140 and the sixth pouring layer 240 can be silica gel or epoxy resin.

That is to say, by providing the fifth potting layer 140 on the outer side of the second potting layer 130, when the relief valve 12 is opened, the degree of damage to the second potting layer 130 can be effectively limited, that is, the damaged portion can be limited to the maximum extent at the relief valve 12, the influence of damage to the first potting layer 120 is effectively reduced, and the reliability of potting protection is improved. Similarly, through setting up sixth encapsulation layer 240 in the outside of fourth encapsulation layer 230, can effectively restrict the degree of damage to fourth encapsulation layer 230 when relief valve 22 is opened, namely, make the destruction part can be restricted in relief valve 22 department by the at utmost, effectively reduce the destruction influence to third encapsulation layer 220, improved the reliability of encapsulation protection. Moreover, the manufacturing process of the pouring layer can be simplified by adopting silica gel or epoxy resin, a better pouring protection effect can be ensured, and the pouring protection device has better practicability and applicability.

Further, the first potting layer 120, the second potting layer 130, and the fifth potting layer 140 fill the space between the side walls and the bottom of the first battery module 110 and the first case 100, so that they are closely attached to the explosion-proof case body and fix the first battery module 110, preventing the first battery module 210 from colliding when the explosion-proof battery 1000 is moved, and causing unnecessary reactions inside the first battery module 110. Similarly, the third potting layer 220, the fourth potting layer 230 and the sixth potting layer 240 fill the space between the sidewalls and the bottom of the second battery module 210 and the second case 200, so that the second battery module 210 is tightly attached to the explosion-proof case body and the second battery module 210 is fixed, thereby preventing the second battery module 210 from colliding when the explosion-proof battery 1000 is moved and causing an unnecessary reaction inside the second battery module 210.

Further, as shown in fig. 6, the explosion-proof battery 1000 may further include: a first pressure sensor 150, a second pressure sensor 250, and a third pressure sensor 330.

Wherein the first pressure sensor 150 is disposed in the first tank 100, the second pressure sensor 250 is disposed in the second tank 200, and the third pressure sensor 330 is disposed in the third tank 300, wherein a pressure threshold of the third pressure sensor 330 is less than pressure thresholds of the first pressure sensor 150 and the second pressure sensor 250.

Specifically, because the pressure threshold of third pressure sensor 330 is less than the pressure threshold of first pressure sensor 150 and second pressure sensor 250, consequently, make gas enter into third box 300 through first pressure relief device 400 or second pressure relief device 500, receive the pressure after the buffering decompression of third box 300, still can reach the pressure threshold who triggers third pressure sensor 330, 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 and the external circuit, in time carry out the pressure release to box internal pressure simultaneously, reduce explosion potential hazard of explosion-proof battery in the at utmost.

In an embodiment of the present invention, as shown in fig. 7, the first box 100, the second box 200, and the third box 300 are explosion-proof boxes, and the explosion-proof boxes include: a case body 101 and an explosion-proof cover 102.

Wherein, explosion-proof cover 102 sets up on box body 101, and explosion-proof cover 102 links to each other with box body 101 through the bolt to in time change and maintain first battery module 110 or second battery module 210, practice thrift manufacturing cost.

Further, free spaces exist between the pouring layer covering the first battery module 110 and the pouring layer covering the second battery module 210 and the explosion-proof cover 102, so that a buffer area is provided for generated gas after the pressure release valve 12 or the pressure release valve 22 is opened, and explosion accidents and the like of the explosion-proof box body are avoided.

In an embodiment of the present invention, as shown in fig. 8, the explosion-proof battery may further include a first support 160, a second support 260, and a third support 340.

Wherein the first support 160 is disposed in the first casing 100 for supporting and fixing the first battery module 110, the second support 260 is disposed in the second casing 200 for supporting and fixing the second battery module 210, and the third support 340 is disposed in the third casing 300 for supporting and fixing the power control module 310.

In summary, the explosion-proof battery of the embodiment of the invention can cover the electrodes of the first battery module and the second battery module respectively through the first pouring layer and the second pouring layer, and the third pouring layer and the fourth pouring layer, effectively realize the isolation of the electrodes, avoid the occurrence of an explosive accident caused by the contact between the electric spark generated by the electrodes of the battery modules and the environmental gas, meanwhile, two-stage discharge is formed by arranging pressure relief devices between the first box body and the third box body, between the second box body and the third box body and on the third box body respectively, so as to effectively reduce the pressure of the gas exhausted from the first battery module and the second battery module to damage the upper-level shell through gradual release, and further avoid explosive extreme damage to the external environment, in addition, the battery in the explosion-proof battery is divided into two modules to be placed in different boxes, so that the safety coefficient of the explosion-proof battery can be greatly improved.

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.

Claims (10)

1. An explosion-proof battery, comprising:

the device comprises a first box body, a second box body and a third box body;

the first battery module is arranged in the first box body and comprises a first area and a second area;

the second battery module is arranged in the second box body and comprises a third area and a fourth area;

the power supply control module is arranged in the third box body;

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

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

and the third pressure relief device is arranged in the third box body and is used for relieving the pressure in the third box body to the outside.

2. The explosion-proof battery as set forth in claim 1, wherein the second region includes all the pressure relief valves in the first battery module;

the fourth region includes all the pressure relief valves in the second battery module.

3. The explosion-proof battery as defined in claim 2, further comprising:

a first potting layer covering the first area of the first battery module, the first potting layer having a first opening corresponding to the pressure relief valve of the first battery module, such that the pressure relief valve of the first battery module can vent gas through the first opening;

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

a third potting layer covering the third area of the second battery module, the third potting layer having a second opening corresponding to the pressure relief valve of the second battery module, such that the pressure relief valve of the second battery module can vent gas through the second opening;

and a fourth pouring layer at least covering the fourth area of the second battery module, wherein the impact strength of the fourth pouring layer is smaller than the impact strength of the second battery module when the pressure release valve is opened, so that the pressure release valve of the second battery module breaks the fourth pouring layer when opened.

4. The explosion-proof battery of claim 3 wherein the second potting layer also covers the first region and the second potting layer has an impact strength less than the impact strength of the first potting layer;

the fourth pouring layer also covers the third area, and the impact strength of the fourth pouring layer is smaller than that of the third pouring layer.

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

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

cover the sixth of fourth encapsulation layer waters the encapsulation layer, wherein, the sixth is watering the encapsulation layer and is in the relief valve position department of second battery module has the fourth opening, the fourth opening corresponds the relief valve of second battery module, so that the relief valve of second battery module can pass through the fourth opening is carminative, the impact strength of sixth encapsulation layer is greater than the impact strength of third encapsulation layer, wherein, first encapsulation layer the second encapsulation layer the third encapsulation layer the fourth encapsulation layer the fifth encapsulation layer with the sixth encapsulation layer is silica gel or epoxy.

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

a first pressure sensor disposed in the first tank;

a second pressure sensor disposed in the second tank;

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

7. The explosion-proof battery as defined in claim 5, wherein the first case, the second case and the third case are explosion-proof cases, the explosion-proof cases comprising:

a box body;

the explosion-proof cover is arranged on the box body, and the explosion-proof cover is connected with the box body through a bolt.

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

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

the second box body and the third box body are electrically connected through a second lead device, so that the second battery module is electrically connected with the power supply control module;

and a third lead device is arranged on the third box body so that the power supply control module is electrically connected with an external circuit.

9. The explosion-proof battery as set forth in claim 7, wherein free spaces exist between the encapsulation layers covering the first battery module and the second battery module, respectively, and the explosion-proof cover.

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

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

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

and the third supporting piece is arranged in the third box body and is used for supporting and fixing the power supply control module.

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