CN217984503U - Low-voltage battery interface circuit, low-voltage power supply device and insulin pump - Google Patents
Low-voltage battery interface circuit, low-voltage power supply device and insulin pump Download PDFInfo
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- CN217984503U CN217984503U CN202222257605.1U CN202222257605U CN217984503U CN 217984503 U CN217984503 U CN 217984503U CN 202222257605 U CN202222257605 U CN 202222257605U CN 217984503 U CN217984503 U CN 217984503U
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Abstract
The utility model relates to a low voltage battery interface circuit, low voltage power supply unit and insulin pump, wherein low voltage battery interface circuit includes: the fuse comprises a battery connector, a fuse body, a first connecting port and a second connecting port; the positive end of the battery connector is connected with the first end of the fuse link, and the second end of the fuse link is connected with the first connection port; the negative terminal of the battery connector is connected with the second connection port. The interface circuit is mainly composed of a battery connector and a fuse link. The positive terminal of the battery connector is the terminal of the battery which outputs voltage and current when the battery is connected, and the other terminal is the negative terminal. In the circuit, the positive terminal of the battery connector is connected with the first connection port through the fuse link, so that the current output by the battery connector passes through the fuse link in the load use process. Thus, when the current in the circuit abnormally increases, the fuse body disconnects the protection circuit.
Description
Technical Field
The utility model relates to a small-size medical equipment technical field especially relates to a low voltage battery interface circuit, low voltage power supply unit and insulin pump.
Background
Insulin pumps are generally powered by 1.5 volt dry cell batteries or around 3 volt lithium batteries. Since the insulin pump is applied to the medical field, the safety requirements are high to avoid medical accidents. For the safety of the insulin pump in the using process, the hardware circuit of the insulin pump needs to be set with the functions of reverse connection prevention, overvoltage prevention, overcurrent prevention and electrostatic protection (electrostatic discharge) of ESD (electrostatic discharge) so as to ensure the safety of a user in the using process.
In the prior art, circuit protection design is generally performed aiming at the scenes that the power supply voltage of electric automation is higher and the area size of a circuit board is larger, and the low-voltage circuit safety protection design of a 1.5V dry battery or a 3V lithium battery for personal health equipment is not provided.
Aiming at the problem that the low-voltage battery interface circuit in the related technology is lack of safety protection design, no effective solution is provided at present.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is desirable to provide a low-voltage battery interface circuit, a low-voltage power supply device and an insulin pump.
In a first aspect, the present invention provides a low voltage battery interface circuit, the low voltage battery interface circuit includes: the fuse comprises a battery connector, a fuse body, a first connecting port and a second connecting port;
the positive end of the battery connector is connected with the first end of the fuse link, and the second end of the fuse link is connected with the first connection port;
the negative terminal of the battery connector is connected with the second connection port.
In one embodiment, the low-voltage battery interface circuit further comprises: a first semiconductor device;
a first end of the first semiconductor device is connected with a second end of the fuse link, and a second end of the first semiconductor device is connected with a negative end of the battery connector;
the first semiconductor device is turned on in a direction that a second terminal thereof leads to a first terminal.
In one embodiment, the low-voltage battery interface circuit further comprises: a second semiconductor device;
the first end of the second semiconductor device is connected with the second end of the fuse link, and the second end of the second semiconductor device is connected with the first connection port;
the second semiconductor device is turned on in a direction from the first terminal to the second terminal.
In one embodiment, the fuse link is a fuse;
the first semiconductor device is a zener diode.
In one embodiment, the fuse link is a fuse;
the second semiconductor device is an IC device, the input end of the IC device forms the first end of the semiconductor device, and the output end of the IC device forms the second end of the semiconductor device;
the enabling end of the IC device is connected with the second end of the fuse link, and the grounding end of the IC device is connected with the negative end of the battery connector;
wherein the IC device is configured to turn on when the enable terminal is at a high potential.
In one embodiment, the low-voltage battery interface circuit further comprises: a transient diode;
the first end of the transient diode is connected with the second end of the fuse link, and the second end of the transient diode is connected with the negative end of the battery connector.
In one embodiment, the low-voltage battery interface circuit further comprises: a capacitor device;
the first end of the capacitor device is connected with the first connection port, and the second end of the capacitor device is connected with the second connection port.
In a second aspect, the present invention further provides a low voltage power supply device, which includes a battery interface and a battery mounting assembly, wherein the battery mounting assembly is connected to the battery interface;
the battery interface comprises the low voltage battery interface circuit provided in the first aspect.
In one embodiment, the battery mounting assembly comprises a mounting shell, a battery cavity for accommodating a battery is arranged in the mounting shell, a first end of the battery cavity is provided with an anode contact, and a second end of the battery cavity is provided with a cathode contact;
the first end of the battery cavity is also provided with a limiting bulge, and the limiting bulge extends towards the inside of the battery cavity.
In a third aspect, the utility model also provides an insulin pump, which comprises a pump body and a power supply device, wherein the power supply device is connected with the pump body;
the power supply device is the low-voltage power supply device provided in the second aspect.
The utility model provides a low-voltage battery interface circuit can be used to adopt the personal health equipment of low voltage power. The interface circuit is mainly composed of a battery connector and a fuse link, and is provided with a first connection port and a second connection port. In the circuit, the positive terminal of the battery connector is connected with the first connection port through the fuse link, so that the current output by the battery connector passes through the fuse link in the load use process. Thus, when the current in the circuit is abnormally increased, the fuse body can break the protection circuit. Therefore, the low-voltage battery interface circuit capable of protecting the low-voltage electric equipment is provided, and the problem that the low-voltage battery interface circuit in the prior art is lack of safety protection design is solved.
Drawings
Fig. 1 is a schematic structural diagram of a low-voltage battery interface circuit in the present invention.
Fig. 2 is a schematic structural diagram of a low-voltage battery interface circuit in one embodiment.
Fig. 3 is a schematic diagram of a low-voltage battery interface circuit in another embodiment.
Fig. 4 is a schematic diagram of the low-voltage battery interface circuit in one of the preferred embodiments.
Fig. 5 is a schematic diagram of the low voltage battery interface circuit in another preferred embodiment.
Fig. 6 is an exploded view of the structure of the battery mounting assembly in the preferred embodiment.
Fig. 7 is a schematic view of the battery mounting in the preferred embodiment.
Fig. 8 is a schematic view of the reverse connection installation of the battery in the present preferred embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.
It will be understood that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Fig. 1 is a schematic structural diagram of a low-voltage battery interface circuit in the present invention. Referring to fig. 1, the present invention provides a low-voltage battery interface circuit, which includes: a battery connector 10, a fuse body 20, a first connection port 11, and a second connection port 12;
the positive terminal of the battery connector 10 is connected with the first terminal of the fuse link 20, and the second terminal of the fuse link 20 is connected with the first connection port 11;
the negative terminal of the battery connector 10 is connected to the second connection port 12.
Specifically, the utility model provides an interface circuit is used for the low voltage battery scene, is a low voltage circuit safety protection technique, also can be used to the individual health equipment who adopts the low voltage power supply consequently. Illustratively, the low voltage battery may be a 1.5 volt dry cell battery or a 3 volt lithium battery.
The interface circuit is mainly composed of a battery connector 10 and a fuse link 20, and has a first connection port 11 and a second connection port 12. The battery connector 10 is used to connect a battery for supplying power, and the positive terminal of the battery connector 10 is the terminal that outputs voltage and current when the battery is connected, and the other terminal is the negative terminal. In this circuit, the positive terminal of the battery connector 10 is connected to the first connection port 11 via the fuse 20, and therefore, during load use, the current output from the battery connector 10 passes through the fuse 20. So that the fuse link 20 opens the protection circuit when the current in the circuit abnormally increases. Therefore, the low-voltage battery interface circuit capable of protecting the low-voltage electric equipment is provided, and the problem that the low-voltage battery interface circuit in the prior art is lack of safety protection design is solved. Illustratively, the battery connector 10 may be a connector manufactured by MOLEX, model 503763-0291.
When the battery is connected, the first connection port 11 is an output port of the circuit, and the second connection port 12 is an input port of the circuit.
In some of these embodiments, the fuse link 20 is a fuse that can blow the protection circuit when the current is too large. Preferably, the fuse is a self-recovery fuse. The resistance value of the self-recovery fuse can change along with the specific circuit condition, the temperature of the self-recovery fuse rapidly rises along with the abnormal increase of the current flowing through the self-recovery fuse, and the corresponding resistance value can become very large, so that the current intensity passing through the self-recovery fuse can be limited, and the current limiting effect is achieved. When the abnormally increased current disappears, the resistance value of the self-recovery fuse is also recovered to a normal value. The self-healing fuse also blows the protection circuit if the current flowing through the fuse exceeds its rated current. Therefore, the self-recovery fuse is adopted, the protection circuit can be fused when the current is overlarge, and the resistance value changes along with the current, so that the current limiting function is realized. For example, the self-recovery fuse may be a PPTC (polymer positive temperature coefficient) self-recovery fuse having a stable DC resistance of 0.03 Ω, which is made by littel fuse manufacturer as model 0402L075 SL.
Fig. 2 is a schematic structural diagram of a low-voltage battery interface circuit in one embodiment. As shown in fig. 2, in one embodiment, the low-voltage battery interface circuit further includes: a first semiconductor device 30;
a first end of the first semiconductor device 30 is connected with a second end of the fuse link 20, and a second end of the first semiconductor device 30 is connected with a negative terminal of the battery connector 10;
the first semiconductor device 30 is turned on with its second end leading to the first end.
Specifically, the first semiconductor device 30 has a parallel relationship with the circuit load in the present embodiment. When the battery is connected positively, the battery connector 10 outputs a voltage from its positive terminal so that the first terminal of the first semiconductor device 30 has a higher potential than its second terminal, and therefore the first semiconductor device 30 does not conduct, which is equivalent to an open circuit, when a current normally flows through the circuit load, so that the circuit load is normally used. When the battery is reversely connected, the battery connector 10 outputs a voltage from its negative terminal, so that the potential of the second terminal of the first semiconductor device 30 is higher than that of the first terminal thereof, and thus the first semiconductor device 30 is turned on, and the voltage drop of the semiconductor device when it is turned on is relatively small and substantially constant due to its own characteristics. For example, the forward conduction voltage drop of a silicon tube is 0.7 volt, and the forward conduction voltage drop of a germanium tube is 0.3 volt. The voltage across the first semiconductor device 30 is therefore small, which in turn causes the voltage across the circuit load to be equally small, so that the current through the circuit load is very little and the load will not burn out. In other words, when the first semiconductor device 30 is conducting in the forward direction, current flows primarily from the battery connector 10 negative through the first semiconductor device 30 to the fuse link 20, while only very little current is carried through the circuit load to the fuse link 20. Meanwhile, when the first semiconductor device 30 is turned on, the voltage across the fuse link 20 is relatively high, and at this time, the current flowing through the fuse link 20 is relatively high, and if the current exceeds the rated current of the fuse link 20, the fuse link 20 is fused, so that the purpose of protecting the circuit is achieved. Preferably, the first semiconductor device 30 is a zener diode, and the forward conduction voltage of the diode is small, less than about 1 volt, so that the load is not burned out and can be effectively protected. Illustratively, the zener diode is a littlefuse manufacturer model SZMMSZ4678T1G zener diode.
In addition to the reverse connection prevention realized by the above embodiments, the reverse connection prevention can also be realized by other methods.
Fig. 3 is a schematic structural diagram of a low-voltage battery interface circuit in another embodiment. In another embodiment, as shown in fig. 3, the low-voltage battery interface circuit further comprises: a second semiconductor device 40;
a first end of the second semiconductor device 40 is connected to the second end of the fuse link 20, and a second end of the second semiconductor device 40 is connected to the first connection port 11;
the second semiconductor device 40 is turned on in a direction from its first end to its second end.
Specifically, the second semiconductor device 40 in the present embodiment has a series relationship with the circuit load. When the battery is connected positively, the second semiconductor device 40 is turned on, and current can normally pass through the second semiconductor device 40, so that current can normally pass through the circuit load, and the circuit load can be normally used. When the battery is reverse connected, the second semiconductor device 40 is turned off and current cannot pass through the second semiconductor device 40, so that no current passes through the circuit load.
Preferably, the second semiconductor device 40 is an IC device, an input terminal of the IC device constitutes a first terminal of the semiconductor device, and an output terminal of the IC device constitutes a second terminal of the semiconductor device; the enable terminal of the IC device is connected to the second terminal of the fuse link 20, and the ground terminal of the IC device is connected to the negative terminal of the battery connector 10; wherein the IC device is configured to turn on when the enable terminal is at a high potential. Specifically, when the battery is connected positively, the IC device is in a conductive state because the enable terminal of the IC device is at a high potential. When the battery is reversely connected, the IC device is in a non-conducting state because the enable end of the IC device is at a low potential. Illustratively, the IC device may be an IC device manufactured by LITTEFUSE, model MAX40203ANS + T. When the battery works normally, the voltage drop of the IC device is only dozens of millivolts, and the service efficiency of the battery is not influenced.
Referring to fig. 3 and 4, in some of these embodiments, the low-voltage battery interface circuit further comprises: a transient diode 50;
a first terminal of the transient diode 50 is connected to the second terminal of the fuse link 20 and a second terminal of the transient diode 50 is connected to the negative terminal of the battery connector 10.
Specifically, the main function of the transient diode 50 is to prevent static discharge, thereby ensuring the electrical safety of the circuit load. Illustratively, the transient diode 50 may be a TVS tube of the littel fuse manufacturer's PESD2V0Y1BSF, and the transient diode 50 may protect against ESD static electricity of 20KV or more.
Referring to fig. 3 and 4, in some of these embodiments, the low-voltage battery interface circuit further comprises: a capacitor device 60;
a first terminal of the capacitor device 60 is connected to the first connection port 11, and a second terminal of the capacitor device 60 is connected to the second connection port 12.
Specifically, the capacitor device 60 has a primary function of filtering, which is in parallel relationship with the circuit load, so that the current-voltage output of the interface circuit is more stable. Preferably, the capacitor device 60 is composed of two filter capacitors with different capacitance values.
The utility model discloses in, still provide a low voltage power supply unit, mainly used provides the electric energy to using electrical apparatus. The low-voltage power supply device includes: a battery interface and a battery mounting assembly; the battery mounting assembly is connected with the battery interface; this battery interface includes the utility model provides a low voltage battery interface circuit.
Specifically, the battery mounting assembly is used to mount a battery and is connected to a battery connector 10 in a low voltage battery interface circuit so that the battery can supply power to an electric device through the battery interface circuit, while the battery interface circuit can effectively protect the electric device when the battery is reversely connected.
Further, in one embodiment, the battery mounting assembly includes a mounting housing, the mounting housing having a battery cavity therein for accommodating a battery, the battery cavity having a first end provided with an anode contact and a second end provided with a cathode contact;
the first end of the battery cavity is also provided with a limiting bulge, and the limiting bulge extends towards the inside of the battery cavity and protrudes out of the anode contact piece.
Specifically, the low-voltage power supply device in the embodiment has the reverse connection prevention effect in the battery interface circuit, and also has the reverse connection prevention effect in the battery mounting assembly. When the battery is normally mounted in the battery cavity, the positive terminal of the battery has a projection so that it can normally contact the anode contact. When the battery is reversely arranged in the battery cavity, the negative end of the battery is planar, so that the negative end of the battery cannot contact the anode contact member under the action of the limiting protrusion, and the effect of preventing reverse connection is achieved.
In a further embodiment, the battery mounting assembly is removably mounted. Specifically, the installation component still includes the installation lid, and installation lid detachable installs the first end at the installation casing, and spacing arch then sets up in the installation lid and is close to one side in battery chamber, and the border position of positive pole contact is provided with the spacing bellied spacing mouth of cooperation, and when the installation lid was installed on the installation casing, spacing arch extended into the battery chamber through spacing mouthful. It should be further noted that, when the limiting protrusion is actually provided, the thickness of the limiting protrusion should be smaller than the thickness of the battery anode protrusion.
The utility model discloses in, still provide an insulin pump, this insulin pump includes the pump body and power supply unit, and this power supply unit and pump body coupling provide operating voltage for the pump body. Wherein power supply unit is the utility model provides a low voltage power supply unit. Therefore, the insulin pump has the function of preventing reverse connection, and the pump body cannot be damaged when the battery is reversely connected.
The technical solution of the present invention is described below by means of specific preferred embodiments.
Fig. 4 is a schematic diagram of the low-voltage battery interface circuit in one of the preferred embodiments. In a preferred embodiment, as shown in fig. 4, a battery interface circuit for an insulin pump is provided, the insulin pump battery interface circuit consisting of a connector J1 (corresponding to a battery connector) 503763-0291 from MOLEX, a PPTC self-recovery fuse F1 (corresponding to a fuse) from LITTELFUSE, model 0402L075SL, a TVS tube D19 (corresponding to a transient diode) from PESD2V0Y1BSF, a zener diode D42 (corresponding to a first semiconductor device) from szzmmsz 4678T1G, and 2 filter capacitors C3 and C38 (corresponding to capacitive devices) of different capacitance values. The connector J1 has four ports, and illustratively, the port 1 may be a positive terminal and the ports 2, 3, 4 may be negative terminals.
Specifically, the positive terminal of the connector J1 is connected to the first terminal of the self-healing fuse F1, and the negative terminal of the connector J1 is connected to the ground port GND. A first terminal of the TVS tube D19 is connected to the negative terminal of the connector J1 (grounded, respectively), and a second terminal of the TVS tube D19 is connected to the second terminal of the self-healing fuse F1. A first end of the zener diode D42 is connected to the negative terminal of the connector J1 (correspondingly grounded), a second end of the zener diode D42 is connected to the second end of the self-recovery fuse F1, and the zener diode D42 is led from the first end to the second end. The filter capacitors C3 and C38 are connected in parallel, and have a first terminal connected to the negative terminal of the connector J1 (correspondingly grounded) and a second terminal connected to the second terminal of the self-healing fuse F1. An output port VCC (corresponding to a first connection port) of the circuit is connected to a second terminal of the self-healing fuse F1, and an input port VCC (corresponding to a second connection port) of the circuit is connected to a negative terminal of the connector J1 (not shown).
The working principle is as follows: the PPTC self-recovery fuse F1 with the model number of 0402L075SL has the stable DC resistance value of 0.03 omega, and the resistance value of the PPTC self-recovery fuse becomes very large along with the abnormal increase of the current flowing through the PPTC self-recovery fuse F1, so that the PPTC self-recovery fuse can play a role in limiting the current. The TVS tube D19 with the model number PESD2V0Y1BSF can protect the ESD static electricity of more than 20 KV. However, when the battery of the connector J1 is connected in the reverse direction, the zener diode D42 conducts in the forward direction, and the forward conduction voltage VF of the diode is small (about a few tenths of volts) and does not burn the load. The battery is reversely connected, the voltage stabilizing diode D42 is in forward conduction, the voltage on the self-recovery fuse F1 is larger, the current flowing through the self-recovery fuse F1 is larger, and if the current exceeds the rated current of the self-recovery fuse F1, the self-recovery fuse F1 can be fused, so that the purpose of protecting the circuit is achieved. The capacitance values of the two filter capacitors are 22uF and 1uF respectively, and the rated working voltages of the two filter capacitors are 10V and 6.3V respectively.
Fig. 5 is a schematic diagram of the low-voltage battery interface circuit in another preferred embodiment. In another preferred embodiment, as shown in fig. 5, another battery interface circuit for an insulin pump is provided, which is composed of 503763-0291 connector J2 (equivalent to a battery connector) manufactured by MOLEX, a PPTC self-recovery fuse F2 (equivalent to a fuse link) of type 0402L075SL manufactured by LITTELFUSE, a TVS tube D43 (equivalent to a transient diode) of type PESD2V0Y1BSF, an IC device D41 (equivalent to a second semiconductor device) of type MAX40203ANS + T, a resistor R163, and 2 filter capacitors C40 and C39 (equivalent to capacitor devices) of different capacitance values. The connector J2 has four ports, and illustratively, the port 1 may be a positive terminal and the ports 2, 3, 4 may be negative terminals.
Specifically, the positive terminal of the connector J2 is connected to the first terminal of the self-healing fuse F2, and the negative terminal of the connector J2 is connected to the ground port GND. A first terminal of the TVS tube D43 is connected to the negative terminal of the connector J2 (grounded, respectively), and a second terminal of the TVS tube D43 is connected to the second terminal of the self-healing fuse F2. The input end A1 of the IC device D41 is connected to the second end of the self-healing fuse F2, the output end A2 of the IC device D41 is connected to the first connection port VCC of the circuit, the enable end B1 of the IC device D41 is connected to the second end of the self-healing fuse F2 through the resistor R163, and the ground end B2 of the IC device D41 is connected to the negative terminal of the connector J2 (correspondingly grounded). The filter capacitors C40 and C39 are connected in parallel, and have a first terminal connected to the negative terminal of the connector J2 (correspondingly grounded) and a second terminal connected to the first connection port VCC of the circuit. Wherein the second connection port of the circuit is connected to the negative terminal of the connector J2 (not shown).
The main change compared to the last preferred embodiment is the replacement of the zener diode D42 by the IC device D41. The working principle is as follows: when the battery of the connector J2 is reversely connected, the IC device D41 does not work, and the output voltage is zero, so that the aim of protecting a rear-stage circuit is fulfilled. And when the battery normally works, the voltage drop of the IC device D41 is only dozens of millivolts, and the service efficiency of the battery is not influenced.
For the battery interface circuits of the two preferred embodiments described above, the use advantages are: after the 1.5V dry battery passes through the processing circuit, the voltage supplied to the rear-stage load circuit is basically 1.5V, and the use efficiency and the performance of the battery are not influenced. Meanwhile, the purposes of preventing reverse connection, preventing overvoltage and overcurrent and protecting ESD static electricity are achieved. Furthermore, the package size of the selected components is small, which is advantageous for miniaturization of wearable products such as insulin pumps.
In addition to providing anti-reverse optimization in the interface circuit, in another preferred embodiment, a battery mounting assembly is also provided which also has an anti-reverse effect.
Fig. 6 is an exploded view of the structure of the battery mounting assembly in the preferred embodiment. As shown in fig. 6, the battery mounting assembly includes: a battery compartment cover 61, a battery compartment anode 62, a battery compartment cathode 64 and a battery compartment 65 (corresponding to the mounting cover, anode contact, cathode contact and mounting housing, respectively, in the above-described embodiments). Wherein, battery compartment 65 is used for holding battery 63, and the first end opening setting of battery compartment 65, and the first end at battery compartment 65 is installed to battery compartment positive pole 62 detachable, and the second end at battery compartment 65 is installed to battery compartment negative pole 64. The battery compartment cover 61 is detachably mounted at the first end of the battery compartment 65, and a supporting block 66 (equivalent to the limiting protrusion in the above embodiment) is disposed on one side of the battery compartment cover 61 close to the battery compartment 65, after the battery compartment cover 61 is mounted, the supporting block 66 penetrates through the battery compartment anode 62 and extends into the battery compartment 65, the thickness of the supporting block 66 should be smaller than the positive protrusion of the battery 63, and then when the battery 63 is connected positively, the positive protrusion of the battery 63 can normally contact with the battery compartment anode 62.
Fig. 7 is a schematic view of the battery forward mounting in the preferred embodiment, and fig. 8 is a schematic view of the battery reverse mounting in the preferred embodiment. As can be seen by comparing fig. 7 and 8, when the cells are connected, the positive projections of the cells 63 are in normal contact with the battery compartment anode 62, and the negative electrodes of the cells 63 are in contact with the battery compartment cathode 64, since the support block 66 should be smaller in thickness than the positive projections of the cells 63; when the batteries are reversed, the support block 66 prevents the negative poles of the batteries 63 from contacting the battery compartment anode 62, thereby causing an open circuit.
The features of the above embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features in the above embodiments are not described, but should be construed as being within the scope of the present specification as long as there is no contradiction between the combinations of the features.
It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be taken as limiting the present invention, and that suitable modifications and variations of the above embodiments are within the scope of the invention as claimed.
Claims (10)
1. A low-voltage battery interface circuit, said low-voltage battery interface circuit comprising: a battery connector (10), a fuse (20), a first connection port (11), and a second connection port (12);
the positive end of the battery connector (10) is connected with the first end of the fuse link (20), and the second end of the fuse link (20) is connected with the first connection port (11);
the negative terminal of the battery connector (10) is connected to the second connection port (12).
2. The low-voltage battery interface circuit of claim 1, further comprising: a first semiconductor device (30);
a first end of the first semiconductor device (30) is connected with a second end of the fuse link (20), and a second end of the first semiconductor device (30) is connected with a negative end of the battery connector (10);
the first semiconductor device (30) is turned on with its second end leading to the first end.
3. The low voltage battery interface circuit of claim 1, further comprising: a second semiconductor device (40);
a first end of the second semiconductor device (40) is connected with a second end of the fuse link (20), and a second end of the second semiconductor device (40) is connected with the first connection port (11);
the second semiconductor device (40) is turned on in a direction from the first end to the second end thereof.
4. The low-voltage battery interface circuit according to claim 2, characterized in that said fuse link (20) is a fuse;
the first semiconductor device (30) is a zener diode.
5. The low-voltage battery interface circuit according to claim 3, characterized in that said fuse link (20) is a fuse;
the second semiconductor device (40) is an IC device, the input of which constitutes a first terminal of the semiconductor device and the output of which constitutes a second terminal of the semiconductor device;
the enabling end of the IC device is connected with the second end of the fuse link (20), and the grounding end of the IC device is connected with the negative end of the battery connector (10);
wherein the IC device is configured to turn on when the enable terminal is at a high potential.
6. A low voltage battery interface circuit as claimed in any one of claims 1 to 5, further comprising: a transient diode (50);
a first end of the transient diode (50) is connected to a second end of the fuse link (20), and a second end of the transient diode (50) is connected to a negative terminal of the battery connector (10).
7. The low voltage battery interface circuit as claimed in any one of claims 1 to 5, further comprising: a capacitor device (60);
the first end of the capacitor device (60) is connected with the first connection port (11), and the second end of the capacitor device (60) is connected with the second connection port (12).
8. A low-voltage power supply device characterized by comprising: a battery interface and a battery mounting assembly; the battery mounting assembly is connected with the battery interface;
the battery interface comprises a low voltage battery interface circuit as claimed in any one of claims 1 to 7.
9. The low voltage power supply apparatus of claim 8, wherein the battery mounting assembly comprises a mounting housing having a battery cavity therein for receiving a battery, the battery cavity having a first end provided with an anode contact and a second end provided with a cathode contact;
the first end of battery chamber still is provided with spacing arch, spacing arch to battery chamber inside extends.
10. An insulin pump is characterized by comprising a pump body and a power supply device, wherein the power supply device is connected with the pump body;
the power supply device is a low-voltage power supply device as claimed in claim 8 or claim 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222257605.1U CN217984503U (en) | 2022-08-26 | 2022-08-26 | Low-voltage battery interface circuit, low-voltage power supply device and insulin pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222257605.1U CN217984503U (en) | 2022-08-26 | 2022-08-26 | Low-voltage battery interface circuit, low-voltage power supply device and insulin pump |
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|---|---|
| CN217984503U true CN217984503U (en) | 2022-12-06 |
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| CN202222257605.1U Active CN217984503U (en) | 2022-08-26 | 2022-08-26 | Low-voltage battery interface circuit, low-voltage power supply device and insulin pump |
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| CN (1) | CN217984503U (en) |
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2022
- 2022-08-26 CN CN202222257605.1U patent/CN217984503U/en active Active
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