CN212991225U - Explosion-proof battery - Google Patents
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- CN212991225U CN212991225U CN202021383124.XU CN202021383124U CN212991225U CN 212991225 U CN212991225 U CN 212991225U CN 202021383124 U CN202021383124 U CN 202021383124U CN 212991225 U CN212991225 U CN 212991225U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides an explosion-proof battery, which comprises a first explosion-proof box body and a second explosion-proof box body connected with the first explosion-proof box body; the battery module is arranged in the first explosion-proof box body; the temperature adjusting module is connected with the first explosion-proof box body and is used for adjusting the actual temperature of the first explosion-proof box body; and the battery module is electrically connected with the power supply control module. This explosion-proof battery has realized the isolation configuration of power control module group and battery module to and realize the control by temperature change protection mechanism to explosion-proof box, to influence each other when effectively reducing power control module group production detonation accident and battery module when breaking down, realize the two explosion-proof mechanisms of power control module group and battery module, effectively promote explosion-proof battery's fail safe nature and explosion-proof protection level.
Description
Technical Field
The utility model relates to a battery safety technical field especially relates to an explosion-proof battery.
Background
At present, a high-capacity explosion-proof battery used in a coal mine is mainly a special or increased-safety lead-acid storage battery power supply, and has the defects of small energy density, low voltage, few cycle times, serious environmental pollution and the like, and GB 3836 series and IEC60079 series explosion-proof standards have a plurality of limitations on the use of the lead-acid storage battery, so that no particularly good solution is provided for supplying power to the underground high-capacity storage battery. In recent years, equipment such as various underground robots, intelligent dangerous mixture monitoring and monitoring systems and pure electric auxiliary transportation equipment based on new technologies such as 5G and the Internet of things gradually emerge, the requirement of the equipment on battery capacity is increased, however, at present, no high-safety-reliability explosion-proof battery matched with the equipment is available, and the current situation becomes a technical bottleneck restricting the research and development application of the underground robot equipment.
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.
For this reason, the utility model aims to provide an explosion-proof battery has realized the isolation configuration of power control module group and battery module to and realize the control by temperature change protection mechanism to explosion-proof box, to each other's influence when effectively reducing power control module group production deflagration accident and battery module when breaking down, realize the two explosion-proof mechanisms of power control module group and battery module, effectively promote explosion-proof battery's fail safe nature and explosion-proof protection level.
In order to achieve the above object, an embodiment of the present invention provides an explosion-proof battery, including: the first explosion-proof box body and the second explosion-proof box body are connected with the first explosion-proof box body; the battery module is arranged in the first explosion-proof box body; the temperature adjusting module is connected with the first explosion-proof box body and is used for adjusting the actual temperature of the first explosion-proof box body; and the battery module is electrically connected with the power supply control module.
The embodiment of the utility model provides an explosion-proof battery, through configuration battery module among first explosion-proof box, and dispose power control module among the explosion-proof box of second, and the temperature regulation module that is connected with first explosion-proof box, the temperature regulation module is used for adjusting the actual temperature of first explosion-proof box, the isolation configuration of power control module and battery module has been realized, and realize the control by temperature change protection mechanism to explosion-proof box, to each other's influence when effectively reducing power control module and producing the detonation accident with battery module when breaking down, realize the two explosion-proof mechanisms of power control module and battery module, effectively promote explosion-proof battery's fail safe nature and explosion-proof protection level.
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 diagram of an explosion-proof battery according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a battery module according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a power control module according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a battery pack management and protection unit according to another embodiment of the present invention;
fig. 5 is a schematic structural view of an explosion-proof battery according to another embodiment of the present invention.
Description of reference numerals:
the explosion-proof battery pack comprises a first explosion-proof box body 11, a second explosion-proof box body 12, a temperature adjusting module 20, a battery module 13, a power supply control module 14, a temperature detector 210, a heater 211, a cooler 212, a first lead device 15, a second lead device 22, a pressure sensor 16, a pressure relief device 17, a controller 18, a box body 101, an explosion-proof cover 102, a bolt 103, an electrode 131, a pressure release valve 132, a first pouring seal layer 133, a second pouring seal layer 134 and a third pouring seal layer 135.
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 only for the purpose of explaining the present invention, and should not be construed as limiting the present invention. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
Fig. 1 is a schematic structural diagram of an explosion-proof battery according to an embodiment of the present invention.
As shown in fig. 1, the explosion-proof battery 10 includes: the explosion-proof box comprises a first explosion-proof box body 11 and a second explosion-proof box body 12 connected with the first explosion-proof box body 11; a battery module 13 disposed in the first explosion-proof case 11; a temperature adjusting module 20 connected with the first explosion-proof box body 11, the temperature adjusting module 20 being used for adjusting the actual temperature of the first explosion-proof box body 11; and a power control module 14 disposed in the second explosion-proof case 12, wherein the battery module 13 and the power control module 14 are electrically connected. The second explosion-proof box body 12 can be connected with the first explosion-proof box body 11 in different modes according to the requirements of the underground coal mine operation environment. For example, the second explosion-proof case 12 may be welded above the first explosion-proof case 11 to reduce the floor area of the explosion-proof battery 10, or, as shown in fig. 1, the second explosion-proof case 12 may be welded on the side surface of the first explosion-proof case 11 to facilitate the electrical connection between the battery module 13 and the power control module 14.
From this, through configuration battery module among first explosion-proof box, configuration power control module group among the second explosion-proof box to connect first explosion-proof box and second explosion-proof box through the mode of difference, realized the isolation configuration of power control module group and battery module, to influence each other when having reduced power control module group and battery module arbitrary party and breaking down.
In an embodiment of the present invention, the lithium battery has the characteristics of small volume, light weight, large specific energy, etc., so the explosion-proof battery 10 is used as the lithium battery for example, or any other possible batteries for coal mine underground operation, which is not limited to this.
In specific implementation, the battery module 13 in the above example may include: the battery pack can be formed by connecting single lithium batteries in series or parallel.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a battery module according to another embodiment of the present invention, the battery module includes: a battery pack 210 formed by connecting single lithium batteries in series or parallel, and a battery pack management and protection unit 220 associated with the battery pack. Referring to fig. 3, fig. 3 is a schematic structural diagram of a power control module according to another embodiment of the present invention, which may include, for example, an electrical circuit switch unit 310 and a communication circuit switch unit 320.
The electric circuit switch unit 310 and the communication circuit switch unit 320 in the power supply control module 14 are each constituted by a certain number of relays, a certain number of fuses, and a manual mechanical switch.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a battery pack management and protection unit according to another embodiment of the present invention, the battery pack management and protection unit 220 includes a management unit 2201 formed by a battery management system and a protection unit 2202 formed by a relay and a fuse, wherein the management unit 2201 monitors information of voltage, current, temperature, deformation, etc. of a cell in the battery pack 210 in real time, and controls an operating state of the protection unit 2202.
When the temperature adjustment module 20 connected to the first explosion-proof box 11 is configured, the temperature adjustment module 20 is used to adjust the actual temperature of the first explosion-proof box 11, that is, the temperature adjustment module 20 can be used to detect the actual temperature in the first explosion-proof box 11 in real time, and when the current actual temperature is too high, the temperature can be automatically reduced.
It can be understood that, when arranging explosion-proof battery 10 in operation scenes such as pit, then the ambient temperature in pit may be lower, consequently, the temperature regulation module in the embodiment of this application not only can realize cooling down in the first explosion-proof box, can also realize carrying out the intensification processing to the actual temperature of first explosion-proof box simultaneously, from this, realize adjusting explosion-proof battery 10's actual temperature in a flexible way, make explosion-proof battery 10 can be applicable to the operational environment of multiple difference, expand explosion-proof battery 10's application scene.
It should be noted that, in some embodiments of the present invention, referring to fig. 5, fig. 5 is a schematic structural diagram of an explosion-proof battery according to another embodiment of the present invention, the temperature adjustment module 20 includes a temperature detector 210, a heater 211, and a cooler 212; the temperature detector 210, the heater 211 and the cooler 212 are respectively connected with the first explosion-proof box body 11, wherein the temperature detector 210 is used for detecting a first actual temperature inside the first explosion-proof box body 11; the heater 211 is configured to perform corresponding temperature rise adjustment on the first actual temperature when the first actual temperature is smaller than the first temperature threshold; the cooler 212 is used for performing corresponding cooling adjustment on the first actual temperature when the first actual temperature is greater than the second temperature threshold; the second temperature threshold is greater than or equal to the first temperature threshold.
The temperature detector 210 can be configured to detect the first actual temperature of the first explosion-proof box body 11 in real time, so that the heater 211 or the cooler 212 is automatically triggered to enter the working state according to the comparison condition of the first actual temperature and the first temperature threshold and the second temperature threshold, the realization is simple and convenient, the temperature control protection mechanism of the first explosion-proof box body 11 can be automatically aimed at, the flexibility of the realization of the temperature control protection mechanism is improved, and the temperature control protection effect is improved.
Optionally, the heater 211 is a semiconductor heater, and the cooler is a semiconductor cooler, so that the temperature control protection mechanism is more sensitive to implement, the instantaneity of temperature control protection is improved, and the temperature control effect is guaranteed.
Of course, the heater 211 may be any other possible type of heater, and the cooler 212 may be any other possible type of cooler, without limitation.
In some embodiments of the present invention, referring to fig. 5, the explosion-proof battery 10 further includes: a first support 20 provided in the first explosion-proof case 11, and a second support 21 provided in the second explosion-proof case 12. The first support 20 is connected to the battery module 13, the second support 21 is connected to the power control module 14, the first support 20 is used for supporting and fixing the battery module 13, and the second support 21 is used for supporting and fixing the power control module 14. That is, the battery module 13 may be fixedly mounted in the first explosion-proof case 11 via the first support 20, and the power control module 14 may be fixedly mounted in the second explosion-proof case 12 via the second support 21, thereby effectively ensuring the stability of the mounting of the battery module 13 and the power control module 14.
In some embodiments of the present invention, with continued reference to fig. 5, further comprising: a first lead means 15 disposed between the first explosion proof case 11 and the second explosion proof case 12, and a second lead means 22 disposed on the second explosion proof case 12.
The first explosion-proof box body 11 and the second explosion-proof box body 12 are electrically connected with the battery module 13 and the power supply control module 14 through the first lead device 15, and when the concentration of explosive dangerous mixtures in the environment exceeds the standard, the power supply control module 14 controls all the switch control units to be switched off. The second lead means 22 is used for connecting the explosion-proof battery 10 with an external circuit.
In some embodiments of the present invention, the first lead device 15 or the second lead device 22 is composed of a number of glan heads.
In some embodiments, referring to fig. 2 and 5 together, the battery module 13 is electrically connected to the electrical circuit switching unit 310 and the communication circuit switching unit 320 in the power control module 14 through the first lead wire device 15; the electric circuit switch unit 310 and the communication circuit switch unit 320 in the power control module 14 are electrically connected to the external electric circuits and communication circuits of the first explosion-proof case 11 and the second explosion-proof case 12, respectively, via the second lead device 22.
From this, can realize being connected electrically between battery module 13 and the power control module 14, be favorable to power control module 14 to control battery module 13 according to operating condition.
It should be noted that, the above-mentioned first lead device 15 or second lead device 22 mainly functions to fasten and seal the cable, the fastening refers to locking the cable through glan, so that the cable does not generate axial displacement and radial rotation, thus ensuring normal connection of the cable, the sealing refers to IP protection in general, i.e. dust and water proofing, the first lead device 15 or second lead device 22 may also apply a cable waterproof connector with a shield, and is applicable to a cable with a shield layer, an armored cable waterproof connector applicable to armored cable, an explosion-proof cable waterproof connector applicable to dangerous areas such as mines, etc.
In some embodiments of the present disclosure, with continued reference to fig. 5, the battery module 13 includes a first region including all of the electrodes 131 in the battery module 13 and a second region including all of the pressure relief valves 132 in the battery module 13. The explosion-proof battery 10 further includes: a first potting layer 133 covering a first area of the battery module 13, the first potting layer 133 having a first opening corresponding to the pressure release valve 132 so that the pressure release valve 132 can release air through the first opening; and a second potting layer 134 covering at least a second region of the battery module 13, wherein the impact strength of the second potting layer 134 is smaller than the impact strength when the relief valve is opened, so that the relief valve 132 breaks the second potting layer 134 when opened.
The embodiment of the utility model provides an in, it is through the first encapsulation layer that waters to the first region of explosion-proof battery configuration cover battery module to and cover the second encapsulation layer of the second region of battery module at least, realize the protection of watering of battery module with the second encapsulation layer that the first region of adoption cover battery module was watered the first encapsulation layer and is covered the second region of battery module at least.
Therefore, the utility model discloses still realize the explosion-proof protection that the encapsulation protection and the flame proof protection of battery module combined together, realize the two explosion-proof mechanisms of power control module group and battery module, and by the disconnection of all on-off control unit of power control module group control, when can ensureing that explosive environment appears, except the battery module through encapsulation processing, other expose the conductor all not electrified, thereby realize having blocked the contact of ignition source with explosive gas from the source, effectively promote explosion-proof battery's fail safe nature and explosion-proof protection level.
It should be understood that, usually, the main potential ignition source of the lithium battery is the charged component (for example, the utility model discloses the electrode 131 of well battery module 13), also be the positive negative terminal of the single lithium battery in the battery module 13, therefore, in the embodiment of the utility model, set up first encapsulation layer 133 through covering in the first region of battery module 13, realize effectively protecting the corresponding electrode 131 part of single battery by this first encapsulation layer 133 to set up the second encapsulation layer 134 that covers the second region of battery module 13 at least, when realizing the protection to the first layer encapsulation material by this second encapsulation layer 134, also carried out the guard action to relief valve 132 part, realized effectual encapsulation protection.
For example, after the battery module 13 is mounted in the first explosion-proof case 11 in the explosion-proof housing, the battery module 13 and the first support member 20 are sealed with a sealing compound, the bottom and the side of the sealing compound are tightly combined with the case of the first explosion-proof case 11, and a certain free space is formed between the upper surface of the sealing compound and the explosion-proof cover 102.
The embodiment of the utility model provides an in, the configuration second waters the impact strength of seal 134 and is less than the impact strength when the relief valve is opened to break through second when making relief valve 132 open and water seal 134, thereby make the battery arrange to the box after the gas that the inside chemical reaction produced under the extreme condition via relief valve 132, can discharge to the external environment through the pressure relief device 17 that sets up on the explosion-proof lid, thereby avoided gaseous gathering in first explosion-proof box 11 is inside.
The embodiment of the utility model provides an in, first positive negative terminal that waters the sealing layer 133 and can effectively protect the monomer lithium cell realizes the effective isolation of potential ignition source and explosive gas, has reduced the emergence probability of extreme accidents such as burning and explosion by a wide margin, has promoted explosion-proof battery 10's safety protection performance.
In an embodiment of the present invention, with continued reference to fig. 5, the first explosion-proof housing 11 and the second explosion-proof housing 12 include: a case body 101; and an explosion-proof cover 102 disposed on the case body 101, wherein the explosion-proof cover 102 is connected to the case body 101 by bolts 103, a free space is provided between the explosion-proof cover 102 and the upper surface of the encapsulation layer covering the battery module 13, and a sealing rubber strip is used between the explosion-proof cover 102 and the case body 101 for sealing, so as to improve the sealing performance of the entire explosion-proof battery 10, and by providing the free space, it is also possible to assist in disposing some other components (for example, a pressure sensor) to assist in enriching the explosion-proof function of the explosion-proof battery 10.
In an embodiment of the present invention, referring to fig. 5, further includes: and a third pouring layer 135 covering the second pouring layer 134, wherein the third pouring layer 135 has a second opening at the position of the pressure release valve 132, the second opening corresponds to the pressure release valve 132, so that the pressure release valve 132 can exhaust gas through the second opening, and the impact strength of the third pouring layer 135 is greater than that of the first pouring layer 133.
In an embodiment of the present invention, the first, second and third potting layers 133, 134 and 135 fill the space between the battery module 13 and the side wall and the bottom of the first explosion-proof box 11, so that the battery module 13 is tightly attached to the box body 101 of the first explosion-proof box 11 and the battery module 13 is fixed.
The utility model discloses an in the embodiment, first pouring blanket 133, second pouring blanket 134 and third pouring blanket 135 are silica gel or epoxy, can simplify the manufacturing process of pouring blanket to can guarantee better pouring protection effect, have better practicality and suitability.
The impact strength of the third encapsulation layer 135 is configured to be greater than the impact strength of the first encapsulation layer 133, so that the third encapsulation layer 135 can form an outermost protection function and further protect the second encapsulation layer 134, that is, the third encapsulation layer 135 can further enhance the protection functions of the first encapsulation layer 133 and the second encapsulation layer 134, and due to the protection and reinforcement effects of the third encapsulation layer 135, the damage degree of the second encapsulation layer 134 can be effectively limited, that is, the damage part can be limited at the relief valve 132 to the maximum extent, so that the destructive influence on the first encapsulation layer is reduced to a great extent, and the reliability of the encapsulation explosion-proof protection method is improved.
In order to further reduce the explosion risk of the explosion-proof battery 10, in an embodiment of the present invention, as shown in fig. 5, further comprising: a pressure sensor 16 disposed in the first explosion-proof case 11; a pressure relief device 17 provided on the explosion-proof cover 102 of the first explosion-proof case 11; and a controller 18 respectively connected to the pressure sensor 16 and the pressure relief device 17, wherein the controller 18 is configured to control the pressure relief device 17 to release the pressure in the first explosion-proof box 11 to the outside when the pressure in the first explosion-proof box 11 increases.
The pressure relief device 17 may be, for example, a flame arrester, a check valve, or a combination of a flame arrester and a check valve, which is not limited herein.
That is, by monitoring the pressure inside the first explosion-proof box body 11, the explosive risk caused by the over-high pressure of the gas inside the first explosion-proof box body 11 can be effectively avoided.
To sum up, the embodiment of the utility model provides an explosion-proof battery, through configuration battery module among first explosion-proof box, and dispose power control module group among the explosion-proof box of second, the isolation configuration of power control module group and battery module has been realized, and realize the control by temperature change protection mechanism to explosion-proof box, to influence each other when effectively reducing power control module group production detonation accident and battery module when breaking down, realize the double explosion-proof mechanism of power control module group and battery module, effectively promote explosion-proof battery's fail safe nature and explosion-proof protection level.
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.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An explosion-proof battery, comprising:
the anti-explosion box comprises a first anti-explosion box body and a second anti-explosion box body connected with the first anti-explosion box body;
the battery module is arranged in the first explosion-proof box body;
the temperature adjusting module is connected with the first explosion-proof box body and is used for adjusting the actual temperature of the first explosion-proof box body;
and the battery module is electrically connected with the power supply control module.
2. The explosion-proof battery as set forth in claim 1, wherein said temperature adjusting module includes a temperature detector, a heater, and a cooler; the temperature detector, the heater and the cooler are respectively connected with the first explosion-proof box body, wherein,
the temperature detector is used for detecting a first actual temperature inside the first explosion-proof box body;
the heater is used for carrying out corresponding temperature rise adjustment on the first actual temperature when the first actual temperature is smaller than a first temperature threshold value;
the cooler is used for correspondingly cooling and adjusting the first actual temperature when the first actual temperature is greater than a second temperature threshold; the second temperature threshold is greater than or equal to the first temperature threshold.
3. The explosion-proof battery as set forth in claim 2, wherein said heater is a semiconductor heater and said cooler is a semiconductor cooler.
4. The explosion-proof battery as set forth in claim 1, wherein,
the second explosion-proof box body is welded on the first explosion-proof box body, or the second explosion-proof box body is welded on the side face of the first explosion-proof box body.
5. The explosion-proof battery as defined in claim 1, further comprising:
the first explosion-proof box body and the second explosion-proof box body are electrically connected through a first lead device, so that the battery module is electrically connected with the power supply control module;
and a second lead device is also arranged on the second explosion-proof box body and is used for connecting the explosion-proof battery with an external circuit.
6. The explosion-proof battery of claim 4, wherein the battery module includes a first region including all of the electrodes in the battery module and a second region including all of the pressure relief valves in the battery module.
7. The explosion-proof battery as defined in claim 6, further comprising:
the first pouring layer covers the first area of the battery module, and is provided with a first opening corresponding to the pressure release valve, so that the pressure release valve can exhaust gas through the first opening; and
and a second pouring layer at least covering the second area of the battery module, wherein the impact strength of the second pouring layer is smaller than that of the pressure release valve when the pressure release valve is opened, so that the pressure release valve breaks the second pouring layer when opened.
8. The explosion-proof battery as set forth in claim 7, further comprising:
and a third pouring layer covering the second pouring layer, wherein the third pouring layer is provided with a second opening at the position of the pressure release valve, the second opening corresponds to the pressure release valve so that the pressure release valve can exhaust gas through the second opening, and the impact strength of the third pouring layer is greater than that of the first pouring layer.
9. The explosion-proof battery of claim 8 wherein the first and second explosion-proof cases comprise:
a box body;
the explosion-proof cover is arranged on the box body, is connected with the box body through bolts, and covers a free space between the upper surface of a pouring layer of the battery module and the explosion-proof cover.
10. The explosion-proof battery as defined in claim 4, further comprising:
a pressure sensor disposed within the first explosion-proof housing;
the pressure relief device is arranged on the explosion-proof cover of the first explosion-proof box body;
and the controller is respectively connected with the pressure sensor and the pressure relief device and is used for controlling the pressure relief device to release the pressure in the first explosion-proof box body to the outside when the pressure in the first explosion-proof box body is increased.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021383124.XU CN212991225U (en) | 2020-07-14 | 2020-07-14 | Explosion-proof battery |
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| CN202021383124.XU CN212991225U (en) | 2020-07-14 | 2020-07-14 | Explosion-proof battery |
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| CN212991225U true CN212991225U (en) | 2021-04-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022012377A1 (en) * | 2020-07-14 | 2022-01-20 | 华瑞矿业科技有限公司 | Explosion-proof battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022012377A1 (en) * | 2020-07-14 | 2022-01-20 | 华瑞矿业科技有限公司 | Explosion-proof battery |
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