CN217824382U - High-reliability intrinsic safety explosion-proof battery circuit - Google Patents
High-reliability intrinsic safety explosion-proof battery circuit Download PDFInfo
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- CN217824382U CN217824382U CN202221995648.3U CN202221995648U CN217824382U CN 217824382 U CN217824382 U CN 217824382U CN 202221995648 U CN202221995648 U CN 202221995648U CN 217824382 U CN217824382 U CN 217824382U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides an intrinsically safe explosion-proof battery circuit, which comprises a battery device and a current-limiting resistance device connected with the battery device, and is characterized in that the intrinsically safe explosion-proof battery circuit also comprises a charging diode device connected between the battery device and the current-limiting resistance device, wherein the battery device comprises one battery or a plurality of batteries connected in series; the current-limiting resistance device is a series resistance array formed by connecting a plurality of high-power resistors in series, and one end of the current-limiting resistance device is connected with a positive input/output pin in a charging terminal of the intrinsically safe explosion-proof battery circuit; the charging diode device is a low-conductor voltage drop diode array formed by connecting a plurality of diodes in parallel, the anode of each diode in the plurality of diodes is connected with a positive input output pin in a charging terminal of the intrinsically safe explosion-proof battery circuit, the cathode of each diode is connected with the anode of the battery device and the other end of the current-limiting resistance device, and the charging diode device is used for realizing a low-power consumption channel in the charging direction when external charging equipment charges the intrinsically safe explosion-proof battery circuit.
Description
Technical Field
The utility model relates to an explosion-proof equipment field especially relates to the explosion-proof battery circuit of this ampere of high reliability.
Background
With the development of industries such as petroleum, chemical industry, coal mine, textile and the like, in some industrial production scenes, explosion accidents may occur due to the high concentration of dust or combustible gas. The prevention of explosive accidents attracts more and more attention of people, so that the electrical equipment used in the places is required to adopt explosion-proof products so as to avoid becoming a dangerous ignition source.
Electrical devices used in explosive gas environments come in a variety of explosion-proof types, such as: explosion-proof type, safety-increasing type, intrinsic safety type (intrinsic safety type for short), casting type, positive pressure type and the like. Except the intrinsic safety type, other types adopt explosion-proof measures of mechanical means, and only the intrinsic safety type adopts energy of a limiting circuit to achieve the aim of explosion prevention. Compared with other explosion-proof types, the safety type has the advantages of high safety degree, small volume, light weight, low manufacturing cost, simple structure, easy operation, easy maintenance and the like.
If the explosion-proof equipment can reach the intrinsic safety explosion-proof capability, the safety of the equipment can be greatly improved. The battery of the explosion-proof equipment is a direct energy output source, and is the most difficult and the most critical link for realizing intrinsic safety explosion prevention in the explosion-proof equipment. In GB 3836.4 it is mentioned that a circuit implemented by resistive current limiting to a certain level is intrinsically safe, however, in order to achieve a defined current, a larger current limiting resistive circuit needs to be wired in series. If the working current of the intrinsically safe explosion-proof battery in the explosion-proof equipment is moderate, the loss efficiency of discharging in the current limiting resistor is acceptable, but the following problems can exist in charging the battery: if a battery is charged with a small current using one charging terminal, the charging time will be too long; if a battery is charged with a large current through one of the charging terminals, the current will cause excessive heating of the current limiting resistor, resulting in high temperature and damage to the battery. If a charging terminal is additionally arranged, a new problem of protecting the charging resistor from the ground is caused.
The utility model provides a method solves this problem to realize a high reliable this ampere of explosion-proof battery circuit based on this kind of method.
The background section is only provided to assist in understanding the present invention and therefore the disclosure in the background section may include some prior art that does not constitute a part of the common general knowledge of a person skilled in the art. The disclosure of the "background" section is not intended to represent a representation of the disclosure or the problems which may be solved by one or more embodiments of the present invention, but is to be understood or appreciated by those of ordinary skill in the art prior to the filing of the present application.
SUMMERY OF THE UTILITY MODEL
The above-mentioned problem that the intrinsic safety explosion-proof battery of the protection and protection equipment exists to prior art, the utility model provides a high reliability intrinsic safety explosion-proof battery circuit.
The utility model provides an explosion-proof battery circuit of this ampere of, its current-limiting resistance device including battery device and be connected with this battery device, its characterized in that, this explosion-proof battery circuit of this ampere of is still including connecting the diode device that charges between this battery device and this current-limiting resistance device, wherein
The battery device comprises a battery or a plurality of batteries connected in series;
the current-limiting resistance device is a series resistance array formed by connecting a plurality of high-power resistors in series, and one end of the current-limiting resistance device is connected with a positive input/output pin in a charging terminal of the intrinsically safe explosion-proof battery circuit; and
the charging diode device is a low-conductor voltage drop diode array formed by connecting a plurality of diodes in parallel, the anode of each diode in the plurality of diodes is connected with the positive input/output pin in the charging terminal of the intrinsically safe explosion-proof battery circuit, the cathode of each diode is connected with the anode of the battery device and the other end of the current-limiting resistance device, and the charging diode device is used for realizing a low-power consumption channel in the charging direction when external charging equipment charges the intrinsically safe explosion-proof battery circuit.
In a preferred embodiment, the intrinsically safe explosion-proof battery circuit further comprises one or more battery charge equalization devices, the number of the battery charge equalization devices is the same as the number of the batteries included in the battery device, each battery charge equalization device is respectively connected in parallel with each corresponding battery in the battery device, and the battery charge equalization devices are used for monitoring the voltage of the batteries connected in parallel when the intrinsically safe explosion-proof battery circuit is charged by using external charging equipment and opening a discharge current channel when the voltage of the batteries is greater than the overcharge detection voltage.
In a preferred embodiment, the battery charging equalization device comprises a protection chip HY2213-BB3A and an N-MOSFET chip YJQ2012A, wherein a pin OUT of the protection chip HY2213-BB3A is connected with a pin G of the N-MOSFET chip YJQ 2012A; a pin VSS of the protection chip HY2213-BB3A and a pin S of the N-MOSFET chip YJQ2012A are connected with the negative electrode of the corresponding battery and are grounded at the same time; the pin VCC of the protective chip HY2213-BB3A is connected with the anode of the corresponding battery through a resistor; the pin D of the N-MOSFET chip YJQ2012A is connected with the anode of the corresponding battery through another resistor; and pin VCC of the protection chip HY2213-BB3A is grounded through a capacitor.
In a preferred embodiment, the intrinsically safe explosion-proof battery circuit further includes a resistor with a large resistance value connected between the positive electrode of the battery device and the sampling pin of the intrinsically safe explosion-proof battery circuit, so that when an external charging device charges the intrinsically safe explosion-proof battery circuit, the external charging device determines the real-time voltage state of the battery device according to the sampling pin.
In a preferred embodiment, the intrinsically safe explosion-proof battery circuit further comprises a temperature detection device for detecting the temperature of the battery device and cutting off the output of the intrinsically safe explosion-proof battery circuit when the temperature exceeds a predetermined threshold.
In a preferred embodiment, the intrinsically safe explosion-proof battery circuit further comprises a power detection and display device for detecting and displaying the power of each battery in the battery device.
To sum up, the utility model discloses an explosion-proof battery circuit of this ampere has realized following beneficial technological effect:
(1) The series resistor array formed by connecting a plurality of high-power resistors in series is used as the current-limiting resistor device, the discharge current of the battery device under the extreme condition can be controlled, so that the intrinsically safe explosion-proof battery meets the requirement of resistance type intrinsically safe discharge current, and compared with a single resistor, the series resistor array formed by connecting a plurality of high-power resistors in series can bear higher power, the heat dissipation effect is better, and the current-limiting resistor device can still normally work under the condition that a certain resistor in the series resistor array is short-circuited, thereby realizing better working safety.
(2) By using the low-conductor voltage drop Schottky diode array formed by connecting a plurality of Schottky diodes in parallel as the charging diode device, because the diodes and the battery have internal resistance, under the charging condition, the resistance value of the parallel diodes is smaller than that of a single diode, and the current distributed on each diode is smaller, so that the low-conductor voltage drop Schottky diode array formed by connecting a plurality of Schottky diodes in parallel can realize a low-power consumption channel in the charging direction, and avoid too large charging heat due to the blocking of the resistor when an external charging device is used for charging the intrinsic safety explosion-proof battery.
(3) The battery charging equalization device can monitor the voltage of the batteries, and when the voltage of the batteries reaches a certain threshold value, a small discharging current channel can be opened, so that the voltages of a plurality of batteries can be kept balanced, and the condition that the total voltage reaches the charging completion voltage and the individual batteries are not charged well due to large difference is avoided.
(4) The external charging equipment can judge the real voltage of the battery according to the sampling pin by connecting the resistor with a large resistance value between the positive end tap of the battery device and the exposed sampling pin, so that effective charging control is implemented.
Drawings
Other features, characteristics, benefits and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings. Wherein:
fig. 1 is a schematic structural diagram of an intrinsically safe explosion-proof battery circuit according to a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an intrinsically safe explosion-proof battery circuit according to a second embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a battery equalization device in an intrinsically safe explosion-proof battery circuit according to a second embodiment of the present invention.
Detailed Description
Fig. 1 shows a schematic structural diagram of an intrinsically safe explosion-proof battery circuit 100 according to a first embodiment of the present invention. As shown in the figure, the intrinsically safe explosion-proof battery circuit 100 of the embodiment of the present invention includes a battery device 110, a current limiting resistor device 120 connected to the battery device 110, and a charging diode device 130 connected between the battery device 110 and the current limiting resistor device 120.
In the present embodiment, the battery device 110 includes 2 lithium batteries B1 and B2 connected in series, and the output voltage is 8.6V.
In this embodiment, the current limiting resistor device 120 includes 16 resistors R1 to R16 of 250 milli-ohm type 2512 connected in series to form a series resistor array with a total resistance of 4 ohms, one end of the current limiting resistor device 120 is connected to the positive input/output pin InoutP in the charging terminal of the intrinsically safe explosion-proof battery circuit 100, wherein the maximum current of the actual operating resistor is 150mA, a voltage drop of 600mV is formed across the series resistor array, the operating efficiency is greater than 90%, the maximum total power consumption across the series resistor array is 90mW, and the temperature rise caused by the resistors R1 to R16 is negligible.
In the present embodiment, the charging diode device 130 is a low conductor voltage drop schottky diode array formed by connecting 4 schottky diodes D1-D4 in parallel, an anode of each diode D1-D4 is connected to the positive input/output pin InoutP in the charging terminal of the intrinsically safe explosion-proof battery circuit 100, and a cathode is connected to the positive electrode (i.e. the positive end tap) VBat8V6 of the battery device 110 and the other end of the current-limiting resistor device 120, so as to implement a low power consumption channel in the charging direction when an external charging device charges the intrinsically safe explosion-proof battery circuit 100 by connecting the charging terminal (including the positive input/output pin InoutP and the negative input/output pin InoutN) of the intrinsically safe explosion-proof battery circuit 100 and the sampling pin Sense, and avoid too much charging heat generated due to the blocking of the resistors R1-R16 during charging, which affects the service lives of the batteries B1 and B2. In the embodiment, the charging diode device 130 uses 4 SMC schottky diodes D1-D4 with a forward conduction voltage drop of 0.3V, the current shared on each diode D1-D4 is 0.5A for the charging current of 2A, the power on each diode D1-D4 is 0.15W, the junction temperature rise of each diode D1-D4 is 12 degrees, and the influence on the ambient temperature is small. Because the diode is also a passive reliable device, the reverse current of the diode is very small, and the diode can not cause adverse effect on discharge current limiting.
Fig. 2 shows a schematic structural diagram of an intrinsically safe explosion-proof battery circuit 100A according to a second embodiment of the present invention. The structure of the intrinsically safe explosion-proof battery circuit 100A is substantially the same as the structure of the intrinsically safe explosion-proof battery circuit 100 of the first embodiment, and the two are different in that: the intrinsically safe explosion-proof battery circuit 100A further includes battery charge equalization devices 140, the number of which is the same as that of the batteries B1 and B2 included in the battery device 110 (i.e. 2), each battery charge equalization device 140 is connected in parallel with the corresponding battery B1 and B2, respectively, and is used for monitoring the voltage of the batteries B1 and B2 connected in parallel therewith when the intrinsically safe explosion-proof battery circuit 100A is charged by using external charging equipment, and opening a discharge current channel when the voltage of the batteries B1 and B2 is greater than an overcharge detection voltage (VCU 4.25V in this embodiment). When the voltage of any one of the two batteries B1 and B2 reaches a voltage greater than the overcharge detection voltage (VCU 4.25V), the battery charge equalization device 130 connected in parallel opens the discharge current channel for the battery charge equalization device, and after a plurality of cycles, the voltages of the batteries B1 and B2 can be kept in balance, thereby avoiding the situation that the total voltage reaches the charge completion voltage and the individual batteries are not charged well due to a large difference.
As shown in fig. 3, the battery charging equalization device 140 in the intrinsically safe explosion-proof battery circuit 100A according to the second embodiment of the present invention includes a protection chip HY2213-BB3A, N-MOSFET chip YJQ2012A and discharge resistors R101 and R102. The pin OUT of the protection chip HY2213-BB3A is connected with the pin G of the N-MOSFET chip YJQ 2012A. Pin VSS of the protection chip HY2213-BB3A and pin S of the N-MOSFET chip YJQ2012A are connected to the negative electrode of the battery B1, and at the same time, are grounded GND. Pin VCC of the protection chip HY2213-BB3A is connected to the positive terminal of the battery B1 through a resistor R101 (150 ohms in this embodiment), and is connected to ground GND through a capacitor C50 (0.1 μ in this embodiment). And pin D of the N-MOSFET chip YJQ2012A is connected to the positive electrode of the battery B1 through a resistor R102 (50 ohms in this embodiment). When the external charging device charges the intrinsically safe explosion-proof battery circuit 100A, the protection chip HY2213-BB3A continuously detects the battery voltage connected between the pin VCC and the pin VSS to control the charge balancing operation. When the voltage of the battery B1 is greater than the overcharge detection voltage (VCU 4.25V), the pin OUT of the protection chip HY2213-BB3A outputs high level to control the conduction of the N-MOSFET chip YJQ2012A, so that the battery B1 is charged slowly; or when the voltage of the battery B1 is lower than the overcharge release voltage (VCR 4.15V in the embodiment), the pin OUT of the protection chip HY2213-BB3A outputs a low level to control the N-MOSFET chip YJQ2012A to turn off the bypass.
A third embodiment of the present invention provides an intrinsically safe explosion-proof battery circuit 100B (not shown). The intrinsically safe explosion-proof battery circuit 100B is substantially the same as the intrinsically safe explosion-proof battery circuit 100 or the intrinsically safe explosion-proof battery circuit 100A, and differs from the intrinsically safe explosion-proof battery circuit 100 or the intrinsically safe explosion-proof battery circuit 100A only in that: the intrinsically safe explosion-proof battery circuit 100B further includes a resistor with a large resistance value (e.g., 10K ohms) connected between the positive electrode (i.e., the positive end tap) VBat8V6 of the battery device 110 and the sampling pin Sense of the intrinsically safe explosion-proof battery circuit 100B, so that when an external charging device charges the intrinsically safe explosion-proof battery circuit 100B, the external charging device can determine the real-time voltage state of the battery device 110 according to the sampling pin Sense.
In a fourth embodiment of the present invention (not shown), the intrinsically safe explosion- proof battery circuit 100 or 100A or 100B further includes a temperature detecting device for detecting the temperature of the battery device 110, and when the temperature exceeds a predetermined threshold, the output of the intrinsically safe explosion- proof battery circuit 100 or 100A or 100B is cut off.
In a fifth embodiment (not shown), the intrinsically safe explosion- proof battery circuit 100 or 100A or 100B further includes a power detection device for detecting and displaying the power of each battery B1 and B2 in the battery device 110
Obviously, those skilled in the art can understand that, according to the practical application scenario, the number of batteries included in the battery device 110 in the intrinsically safe explosion-proof battery circuit 100 of the present invention may be other suitable numbers; the number of the current-limiting resistors included in the current-limiting resistor device (series resistor array) 120 may be other suitable numbers, and the resistance values of the resistors may be other suitable values, but it should be noted that the resistance values of the resistors should be the same; the number of schottky diodes in the charge diode device 130 (schottky diode array) may be other suitable numbers; and the resistor connected between the positive pole (i.e., the positive terminal tap) VBat8V6 of the battery device 110 and the sampling pin Sense of the intrinsically safe explosion-proof battery circuit 100B may adopt other suitable large resistance values.
Furthermore, it will be understood by those skilled in the art that the specific description of the electrical values of the intrinsically safe explosion-proof battery circuit in the embodiments of the present invention described above is not limiting. According to the requirement of concrete application scene, the utility model discloses an intrinsic safety explosion-proof battery circuit's electric numerical value can carry out corresponding adjustment.
The above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made according to the claims and the description of the present application are still included in the protection scope of the present invention. Furthermore, any embodiment or claim of the present invention need not achieve all of the objects, advantages, or features disclosed herein. In addition, the abstract and the title are provided to assist the patent document retrieval and are not intended to limit the scope of the invention.
Claims (6)
1. An intrinsically safe explosion-proof battery circuit, which comprises a battery device and a current-limiting resistance device connected with the battery device, is characterized in that the intrinsically safe explosion-proof battery circuit also comprises a charging diode device connected between the battery device and the current-limiting resistance device, wherein,
the battery device comprises a battery or a plurality of batteries connected in series;
the current-limiting resistance device is a series resistance array formed by connecting a plurality of high-power resistors in series, and one end of the current-limiting resistance device is connected with a positive input/output pin in a charging terminal of the intrinsic safety anti-explosion battery circuit; and
the charging diode device is a low-conductor-voltage-drop diode array formed by connecting a plurality of diodes in parallel, the anode of each diode in the plurality of diodes is connected with the positive input/output pin in the charging terminal of the intrinsically-safe explosion-proof battery circuit, the cathode of each diode is connected with the anode of the battery device and the other end of the current-limiting resistance device, and the charging diode device is used for realizing a low-power-consumption channel in the charging direction when external charging equipment charges the intrinsically-safe explosion-proof battery circuit.
2. The intrinsically-safe explosion-proof battery circuit of claim 1, further comprising one or more battery charge equalization devices, wherein the number of the battery charge equalization devices is the same as the number of batteries included in the battery device, and each battery charge equalization device is connected in parallel with a corresponding battery in the battery device, and is used for monitoring the voltage of the battery connected in parallel with the battery charge equalization device when the intrinsically-safe explosion-proof battery circuit is charged by using an external charging device, and opening a discharge current channel when the battery voltage is greater than an overcharge detection voltage.
3. The intrinsically safe explosion-proof battery circuit of claim 2, wherein the battery charge equalization device comprises a protection chip HY2213-BB3A and an N-MOSFET chip YJQ2012A, wherein the pin OUT of the protection chip HY2213-BB3A is connected with the pin G of the N-MOSFET chip YJQ 2012A; a pin VSS of the protection chip HY2213-BB3A and a pin S of the N-MOSFET chip YJQ2012A are connected with the negative electrode of the corresponding battery and are grounded at the same time; the pin VCC of the protection chip HY2213-BB3A is connected with the anode of the corresponding battery through a resistor; the pin D of the N-MOSFET chip YJQ2012A is connected with the cathode of the corresponding battery through another resistor; and pin VCC of the protection chip HY2213-BB3A is grounded through a capacitor.
4. The intrinsically safe explosion-proof battery circuit of any one of claims 1-3, further comprising a large-resistance resistor connected between the positive electrode of the battery device and a sampling pin of the intrinsically safe explosion-proof battery circuit, wherein the large-resistance resistor is used for judging the real-time voltage state of the battery device through the sampling pin by an external charging device when the intrinsically safe explosion-proof battery circuit is charged by the external charging device.
5. An intrinsically safe explosion-proof battery circuit as claimed in any one of claims 1 to 3, further comprising temperature detection means for detecting the temperature of the battery means and switching off the output of the intrinsically safe explosion-proof battery circuit when the temperature exceeds a predetermined threshold.
6. An intrinsically safe explosion-proof battery circuit as claimed in any one of claims 1 to 3, further comprising a charge detection display device for detecting and displaying the charge of each battery in the battery device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221995648.3U CN217824382U (en) | 2022-07-29 | 2022-07-29 | High-reliability intrinsic safety explosion-proof battery circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221995648.3U CN217824382U (en) | 2022-07-29 | 2022-07-29 | High-reliability intrinsic safety explosion-proof battery circuit |
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| Publication Number | Publication Date |
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| CN217824382U true CN217824382U (en) | 2022-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221995648.3U Active CN217824382U (en) | 2022-07-29 | 2022-07-29 | High-reliability intrinsic safety explosion-proof battery circuit |
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| CN (1) | CN217824382U (en) |
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- 2022-07-29 CN CN202221995648.3U patent/CN217824382U/en active Active
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Effective date of registration: 20221129 Address after: No.8, Huyue East Road, Longchi street, Liuhe District, Nanjing City, Jiangsu Province Patentee after: Tecman (Nanjing) safety protection equipment Co.,Ltd. Address before: 210031 Building D, No.21, Liuzhou North Road, high tech Zone, Nanjing City, Jiangsu Province Patentee before: TECMEN ELECTRONICS Co.,Ltd. |