Capacitor module for solving battery abnormity of power utilization acquisition terminal in low-temperature scene

Abstract

The utility model provides a capacitor module for solving battery abnormity of a power utilization acquisition terminal in a low temperature scene, a voltage determination circuit, a super-capacitor charging circuit and a boost circuit are integrated on a printed board, the voltage determination circuit comprises a chip U1 and a divider resistor, the super-capacitor charging circuit comprises a chip U2 and a shunt resistor, and the boost circuit comprises a chip U1 and a chip U2. According to the boost circuit, an internal logic power supply pin of a chip U3 is connected with a BOOST circuit output by the BOOST circuit, a reset signal pin of a chip U1 is connected with enable signal pins of a chip U2 and the chip U3, a power supply pin of the chip U1 is connected with a nickel-metal hydride battery charging circuit, an input end of the chip U2 is connected with the nickel-metal hydride battery charging circuit, an output end of the chip U2 is connected with a super capacitor, and the super capacitor is connected with a power supply pin of the chip U1. The input end and the output end of the chip U3 are both connected with the nickel-metal hydride battery charging circuit, and a switch pin of the chip U3 is connected with the super capacitor. By adopting the technical scheme, the cost is lower than that of a low-temperature nickel-metal hydride battery, and a nickel-metal hydride battery pack can be directly replaced.

Description

Technical Field

[0001] This utility model relates to a capacitor module, and more particularly to a capacitor module for solving battery abnormalities in power acquisition terminals under low-temperature conditions. Background Technology

[0002] In Inner Mongolia and Northeast China, winter temperatures can drop to around -40°C. Under these conditions, conventional nickel-metal hydride batteries experience a decrease in electrolyte viscosity and conductivity, severely affecting their charging and discharging parameters. Consequently, as backup power sources for power acquisition terminals, these batteries frequently experience low output voltage, no output, or severely insufficient power. This results in the battery being unable to support the power acquisition terminal in reporting power outage events after an abnormal power grid outage, seriously impacting the normal operation and maintenance of the power grid.

[0003] In the prior art, a new type of nickel-metal hydride battery, by adding a low-temperature active film to the positive and negative poles and adding other measures, can ensure that the battery discharge capacity can reach more than 83% of the total capacity at -40℃. This is called a low-temperature nickel-metal hydride battery, which effectively solves the aforementioned problems of nickel-metal hydride batteries at low temperatures. However, the cost of low-temperature nickel-metal hydride batteries is high, about three times that of ordinary nickel-metal hydride batteries, and they have not been verified by mass application. Utility Model Content

[0004] To address the aforementioned technical problem of "high cost of low-temperature nickel-metal hydride batteries," this invention provides a capacitor module for resolving battery abnormalities in power acquisition terminals under low-temperature conditions. The technical solution is as follows:

[0005] A capacitor module for solving battery abnormalities in power acquisition terminals under low-temperature conditions is disclosed. A voltage determination circuit, a supercapacitor charging circuit, and a boost circuit are integrated on a printed circuit board. The voltage determination circuit includes chip U1 and voltage divider resistors. The supercapacitor charging circuit includes chip U2 and shunt resistors. The boost circuit is connected to the BOOST circuit output by the internal logic power supply pin of chip U3. The reset signal pin of chip U1 is connected to the enable signal pins of chips U2 and U3. The power supply pin of chip U1 is connected to the NiMH battery charging circuit. The input terminal of chip U2 is connected to the NiMH battery charging circuit, and the output terminal of chip U2 is connected to the supercapacitor. Both the input and output terminals of chip U3 are connected to the NiMH battery charging circuit, and the switch pin of chip U3 is connected to the supercapacitor.

[0006] The voltage determination circuit outputs the following logic: when the voltage between the positive terminal of the battery pack interface and GND is greater than the voltage threshold Vth, the reset signal pin of the voltage determination circuit outputs a low level; when the voltage between the positive terminal of the battery pack interface and GND is less than or equal to the voltage threshold Vth, the reset signal pin of the voltage determination circuit outputs a high level.

[0007] The enable signal pin of chip U2 is active low.

[0008] The enable signal pin of the chip U3 is active high.

[0009] Optionally, the length, width, and height dimensions of the printed circuit board are the same as those of the nickel-metal hydride rechargeable battery pack of the power acquisition terminal.

[0010] Optionally, the external interface of the printed circuit board is consistent with the nickel-metal hydride rechargeable battery pack of the power acquisition terminal.

[0011] Optionally, the external connectors of the printed circuit board are consistent with the nickel-metal hydride rechargeable battery pack of the power acquisition terminal.

[0012] Optionally, the voltage divider resistor is a sliding resistor.

[0013] The voltage threshold Vth can be adjusted by adjusting the resistance value of the voltage divider resistor.

[0014] Optionally, the shunt resistor is a sliding resistor.

[0015] The charging current can be adjusted by adjusting the resistance value of the shunt resistor.

[0016] Optionally, the shunt resistor is grounded.

[0017] Optionally, the chip U1 is grounded.

[0018] Optionally, the supercapacitor is grounded.

[0019] Optionally, the chip U3 is grounded.

[0020] Compared with the existing technology, the advantages of adopting the technical solution of this utility model are:

[0021] This not only solves the problem of traditional nickel-metal hydride battery packs failing at low temperatures and failing to provide energy to the power acquisition terminal, thus preventing the terminal from reporting power outage events; but also, while being cheaper than low-temperature nickel-metal hydride batteries, it has the same interface definition and similar size as nickel-metal hydride battery packs. The supercapacitor module with built-in logic control and charging / discharging circuits can directly replace nickel-metal hydride battery packs and be placed in the battery compartment of the power acquisition terminal, improving the operation and maintenance efficiency in low-temperature scenarios. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a block diagram of the supercapacitor module according to an embodiment of the present invention;

[0024] Figure 2 This is a circuit block diagram of the supercapacitor module in the charging state according to an embodiment of the present invention;

[0025] Figure 3 This is a circuit block diagram of the supercapacitor module in the external discharge state according to an embodiment of this utility model;

[0026] Figure 4 This invention relates to the interface definition and connector type of the nickel-metal hydride battery pack for the power acquisition terminal in this embodiment of the utility model.

[0027] Figure 5 This is a schematic diagram showing the location of the power consumption data acquisition terminal and battery compartment in an embodiment of this utility model.

[0028] In the diagram: 1. Chip U1; 2. Chip U2; 3. Chip U3; 4. Supercapacitor; 5. Voltage divider resistor; 6. Shunt resistor; 7. Battery compartment; 8. LCD screen; 9. RS-232 communication port; 10. USB interface; 11. Local communication module; 12. Main terminal; 13. Remote communication module; 14. Auxiliary terminal. Detailed Implementation

[0029] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0031] The following reference Figures 1-5 The technical solutions of some embodiments of the present invention are described below.

[0032] Example 1

[0033] This utility model provides an embodiment, such as Figure 1As shown in the figure, this embodiment provides a capacitor module for solving battery abnormalities in power acquisition terminals under low-temperature scenarios. The voltage determination circuit, supercapacitor charging circuit, and boost circuit are integrated on a printed circuit board. The voltage determination circuit includes chip U11 and voltage divider resistor 5. The supercapacitor charging circuit includes chip U22 and shunt resistor 6. The boost circuit is a BOOST circuit whose internal logic power supply pin is connected to the output of the BOOST circuit of chip U33. The reset signal pin of chip U11 is connected to the enable signal pins of chip U22 and chip U33. The power supply pin of chip U11 is connected to the nickel-metal hydride battery charging circuit. The input terminal of chip U22 is connected to the nickel-metal hydride battery charging circuit. The output terminal of chip U22 is connected to the supercapacitor 4. The input and output terminals of chip U33 are both connected to the nickel-metal hydride battery charging circuit. The switch pin of chip U32 is connected to the supercapacitor 4.

[0034] The voltage determination circuit outputs the following logic: when the voltage between the positive terminal of the battery pack interface and GND is greater than the voltage threshold Vth, the reset signal pin of the voltage determination circuit outputs a low level; when the voltage between the positive terminal of the battery pack interface and GND is less than or equal to the voltage threshold Vth, the reset signal pin of the voltage determination circuit outputs a high level. The enable signal pin of chip U2 is active low. The enable signal pin of chip U3 is active high.

[0035] Specifically, the internal logic power supply pin of the Vin chip is directly connected to the output of the BOOST circuit, that is, connected to the "positive terminal of the battery pack interface". This ensures that after the corresponding module of this patent is inserted into the battery socket, the internal logic circuit of BOOST is in a ready-to-work state. After the voltage determination circuit outputs a logic high level, the BOOST circuit can immediately switch to the working state.

[0036] Example 2

[0037] This utility model provides another embodiment of a capacitor module for solving battery abnormalities in power acquisition terminals under low-temperature conditions. In this embodiment, the length, width, and height dimensions of the printed circuit board are the same as those of the nickel-metal hydride rechargeable battery pack of the power acquisition terminal.

[0038] Example 3

[0039] This utility model provides another embodiment, which is a capacitor module for solving the problem of abnormal battery in power acquisition terminal under low temperature scenarios. In this embodiment, the external interface of the printed circuit board is consistent with the nickel-metal hydride rechargeable battery pack of the power acquisition terminal.

[0040] Example 4

[0041] This utility model provides another embodiment of a capacitor module that solves the problem of abnormal battery operation in power acquisition terminals under low-temperature conditions. In this embodiment, the external connectors of the printed circuit board are consistent with the nickel-metal hydride rechargeable battery pack of the power acquisition terminal.

[0042] To directly replace a nickel-metal hydride (NiMH) battery pack with a supercapacitor backup power module, both require identical external interface definitions and connector types. Since the backup power control and power failure detection required by product standards are integrated within the power acquisition terminal, and the charging and discharging characteristics of supercapacitors and NiMH batteries differ significantly, simply replacing the NiMH battery pack with supercapacitor 4 is insufficient to achieve backup power functionality. In this embodiment, the supercapacitor module internally includes supercapacitor 4, a charging circuit, a discharging circuit, and a logic control circuit; that is, without altering the existing power acquisition terminal product's structural framework and backup power interface dimensions and definitions, a supercapacitor backup power module can replace the NiMH battery.

[0043] Example 5

[0044] This utility model provides another embodiment, which is a capacitor module for solving the problem of abnormal battery in power acquisition terminal under low temperature scenarios. In this embodiment, the voltage divider resistor 5 is a sliding resistor.

[0045] The voltage threshold Vth can be adjusted by adjusting the resistance value of the voltage divider resistor.

[0046] Example 6

[0047] This utility model provides another embodiment, which is a capacitor module for solving the problem of abnormal battery in power acquisition terminal under low temperature scenarios. In this embodiment, the shunt resistor 6 is a sliding resistor.

[0048] The charging current can be adjusted by adjusting the resistance value of the shunt resistor.

[0049] Example 7

[0050] This utility model provides another embodiment, which is a capacitor module for solving the problem of abnormal battery in power acquisition terminal under low temperature scenarios. In this embodiment, the shunt resistor 6 is grounded.

[0051] Example 8

[0052] This utility model provides another embodiment, which is a capacitor module for solving the problem of abnormal battery in power acquisition terminal under low temperature scenarios. In this embodiment, chip U11 is grounded.

[0053] Example 9

[0054] This utility model provides another embodiment, which is a capacitor module for solving the problem of abnormal battery in power acquisition terminal under low temperature scenarios. In this embodiment, the supercapacitor 4 is grounded.

[0055] Example 10

[0056] This utility model provides another embodiment, which is a capacitor module for solving the problem of abnormal battery in power acquisition terminal under low temperature scenarios. In this embodiment, chip U33 is grounded.

[0057] Example 11

[0058] This utility model provides another embodiment of a capacitor module for resolving battery malfunctions in power acquisition terminals under low-temperature conditions. In this embodiment, the capacitor module is integrated onto a printed circuit board with dimensions of approximately 2.2cm x 2.2cm, making its overall dimensions comparable to the corresponding dimensions of the nickel-metal hydride rechargeable battery pack used in the power acquisition terminal. The printed circuit board is mounted on a... Figure 5 At the location shown in battery compartment 7, the nickel-metal hydride battery pack is directly replaced with a supercapacitor backup power module; the external interface definition and connector type of the supercapacitor backup power module are set as follows. Figure 4 The interface definition and connector type of the nickel-metal hydride battery pack shown are for the power consumption acquisition terminal.

[0059] like Figure 3 As shown, the voltage determination circuit consists of chip U1 and peripheral voltage divider resistor 5, which is used to determine the voltage state of the "positive terminal of the battery pack interface". By selecting the resistance value of voltage divider resistor 5, the voltage threshold Vth to be determined is set. The determination voltage threshold Vth is set to 5.6V, and the output voltage of the battery charging circuit of the acquisition terminal is set to 6V. The determination voltage threshold Vth can be modified according to the specific situation of the output voltage of different battery charging circuits.

[0060] The voltage determination circuit output logic is as follows: when the voltage between the positive terminal of the battery pack interface and GND is >5.6V, the "RESET" pin of the voltage determination circuit outputs a low level; when the voltage between the positive terminal of the battery pack interface and GND is ≤5.6V, the "RESET" pin of the voltage determination circuit outputs a high level.

[0061] The supercapacitor charging circuit consists of chip U2 and peripheral components. The charging current can be set by the external resistor, and the supercapacitor is charged in constant current mode. When its enable signal pin is disabled, its internal anti-reverse current circuit can effectively prevent the supercapacitor 4 from being charged again by the charging circuit after the boost circuit outputs a 5V voltage.

[0062] The boost circuit adopts a typical BOOST circuit, and some modifications have been made to the original circuit: the internal logic power supply pin of the Vin chip is directly connected to the output of the BOOST circuit, that is, connected to the "positive terminal of the battery pack interface", to ensure that the internal logic circuit of the BOOST is in a ready-to-work state after the corresponding module is inserted into the battery socket, and the BOOST circuit can immediately switch to the working state after the voltage determination circuit outputs a logic high level.

[0063] When the voltage between the positive terminal of the battery pack interface and GND is greater than 5.6V, it is logically determined that the NiMH charging circuit of the power acquisition terminal is normal, that is, the external AC power supply is normal. The "RESET" pin of the voltage determination circuit outputs a low level. This low level drives the supercapacitor charging circuit to work normally. The enable of the charging circuit is active low. The voltage across the supercapacitor continuously rises until it reaches the output voltage set by the charging circuit. The cutoff voltage of the charging circuit set in this patented circuit is 2.7V, and the rated voltage of the supercapacitor is 3V. The low level output of the "RESET" pin is simultaneously sent to the enable pin of the boost circuit (the enable of the boost circuit is active high). The boost circuit does not work. Figure 4 As shown.

[0064] When the voltage between the positive terminal of the battery pack interface and GND is ≤5.6V, it is logically determined that the output voltage of the NiMH charging circuit of the power acquisition terminal is abnormal, i.e., the external AC power supply is disconnected. The "RESET" pin of the voltage judgment circuit outputs a high level, which causes the supercapacitor charging circuit to stop working. The high level output of the "RESET" pin is simultaneously sent to the enable pin of the boost circuit. The enable of the boost circuit is active high, and the boost circuit begins to discharge externally and outputs a set 5V voltage to provide power to the power acquisition terminal. Figure 5 As shown.

[0065] Through the above two states, the supercapacitor backup power module corresponding to this utility model can replace the nickel-metal hydride battery pack at low temperatures to power the power acquisition terminal, thus eliminating the aforementioned maintenance problems at low temperatures.

[0066] In this invention, the terms "connection" and "fixing" should be interpreted broadly. For example, "connection" can mean a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0067] In the description of this utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or unit referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0068] In the description of this specification, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0069] The foregoing has described specific embodiments of the present invention in detail. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A capacitor module for solving battery abnormalities in power acquisition terminals under low-temperature conditions, characterized in that, The voltage determination circuit, the supercapacitor charging circuit, and the boost circuit are integrated on the printed circuit board. The voltage determination circuit includes chip U1 (1) and voltage divider resistor (5). The supercapacitor charging circuit includes chip U2 (2) and shunt resistor (6). The boost circuit is the BOOST circuit output by the internal logic power supply pin of chip U3 (3). The reset signal pin of chip U1 (1) is connected to the enable signal pin of chip U2 (2) and chip U3 (3). The power supply pin of chip U1 (1) is connected to the nickel-metal hydride battery charging circuit. The input terminal of chip U2 (2) is connected to the nickel-metal hydride battery charging circuit. The output terminal of chip U2 (2) is connected to the supercapacitor (4). The input and output terminals of chip U3 (3) are both connected to the nickel-metal hydride battery charging circuit. The switch pin of chip U3 (2) is connected to the supercapacitor (4).

2. The capacitor module for solving battery abnormalities in power acquisition terminals under low-temperature scenarios according to claim 1, characterized in that, The length, width, and height dimensions of the printed circuit board are the same as those of the nickel-metal hydride rechargeable battery pack in the power acquisition terminal.

3. A capacitor module for solving battery abnormalities in power acquisition terminals under low-temperature conditions, as described in claim 1, characterized in that... The external interface of the printed circuit board is consistent with the nickel-metal hydride rechargeable battery pack of the power acquisition terminal.

4. A capacitor module for solving battery abnormalities in power acquisition terminals under low-temperature scenarios, as described in claim 1, characterized in that, The external connectors of the printed circuit board are consistent with the nickel-metal hydride rechargeable battery pack of the power acquisition terminal.

5. A capacitor module for solving battery abnormalities in power acquisition terminals under low-temperature conditions, as described in claim 1, characterized in that, The voltage divider resistor (5) is a sliding resistor.

6. A capacitor module for solving battery abnormalities in power acquisition terminals under low-temperature scenarios, as described in claim 1, characterized in that, The shunt resistor (6) is a sliding resistor.

7. A capacitor module for solving battery abnormalities in power acquisition terminals under low-temperature scenarios, as described in claim 1, characterized in that, The shunt resistor (6) is grounded.

8. A capacitor module for solving battery abnormalities in power acquisition terminals under low-temperature conditions, as described in claim 1, characterized in that, The chip U1(1) is grounded.

9. A capacitor module for solving battery abnormalities in power acquisition terminals under low-temperature conditions, as described in claim 1, characterized in that, The supercapacitor (4) is grounded.

10. A capacitor module for solving battery abnormalities in power acquisition terminals under low-temperature scenarios, as described in claim 1, characterized in that, The chip U3(3) is grounded.

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