CN112470402B - Switching device, electrical energy storage system, device and/or vehicle and method for connecting a voltage source to a load resistor - Google Patents
Switching device, electrical energy storage system, device and/or vehicle and method for connecting a voltage source to a load resistor Download PDFInfo
- Publication number
- CN112470402B CN112470402B CN201980050941.7A CN201980050941A CN112470402B CN 112470402 B CN112470402 B CN 112470402B CN 201980050941 A CN201980050941 A CN 201980050941A CN 112470402 B CN112470402 B CN 112470402B
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- Prior art keywords
- transistor
- switching device
- resistor
- load resistor
- voltage source
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
- H03K17/0822—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in field-effect transistor switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/28—Modifications for introducing a time delay before switching
- H03K17/284—Modifications for introducing a time delay before switching in field effect transistor switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/0063—High side switches, i.e. the higher potential [DC] or life wire [AC] being directly connected to the switch and not via the load
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- Protection Of Static Devices (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to a switching device (1) for the electrically conductive connection of a voltage source (V) to a load Resistor (RL), an electrical energy storage system, a device and/or a vehicle and a method for connecting a voltage source (V) to a load Resistor (RL) by means of a switching device, characterized in that the switching device (1) has: -a first transistor (T1), -a second transistor (T2), -a third transistor (T3), -a capacitance (C), and-a switch (S), wherein the voltage source (V) can be conductively connected to the load Resistor (RL) by means of the first transistor (T1), wherein the first transistor (T1) can be switched by means of the switch (S) or by means of the second and third transistors (T2, T3), wherein the third transistor (T3) can be switched by means of the capacitance (C), wherein the second transistor (T2) is arranged such that it switches when the load Resistor (RL) is shorted.
Description
Technical Field
The present invention relates to a switching device, an electrical energy storage system, a device and/or a vehicle and a method for connecting a voltage source to a load resistor by means of a switching device according to the preamble of the independent claims.
Background
CN 103474967A shows a highly integrated battery safety circuit.
US 2015/0180091 shows a battery protected from external short circuits.
Disclosure of Invention
In a switching device for the electrically conductive connection of a voltage source to a load resistor, the core of the invention is that the switching device has:
the first transistor is a transistor of a type,
-A second transistor
-A third transistor
Capacitance, and
The switching of the switch is effected,
Wherein the voltage source can be connected to the load resistor by means of a first transistor,
Wherein the first transistor can be switched by means of a switch or by means of a second and a third transistor,
Wherein the third transistor can be switched by means of a capacitance switch,
Wherein the second transistor is arranged such that it switches when the load resistor is shorted.
The invention is based on the fact that a voltage source can be connected to a load resistor in an electrically conductive manner by means of a switching device. When the load resistor is shorted, in addition to the already turned on second transistor, the third transistor is also turned on and the first transistor is switched, so that this first transistor is blocked and remains blocked from blocking. The current may not be interrupted until the switching device is separated from the voltage source.
The advantage here is that no additional voltage drop occurs during normal operation of the switching device due to the short-circuit protection.
Further advantageous embodiments of the invention are the subject matter of the dependent claims.
According to one advantageous embodiment, the switching device has a first resistor and a second resistor, wherein the switching device is provided for charging the capacitor via the first resistor and the second resistor. The capacitor can thus be charged during operation of the switching device.
In this case, it is advantageous if the second transistor and the third transistor are arranged in a series circuit. The first transistor is thus turned on when the second transistor and the third transistor are turned on.
The first resistor is advantageously arranged in parallel with the series circuit. Here, the first resistor limits the voltage between the control electrode and the source of the first transistor.
It is also advantageous if the second resistor is arranged between the control electrode of the third transistor and the switch. The first and second resistors limit the charging current for the capacitor.
It is also advantageous if the second resistor is arranged between the capacitor and the switch.
The switching device is advantageously designed such that the third transistor is switched in a delayed manner as a function of the switching, in particular wherein the duration of the delay is dependent on the size of the second resistor and the size of the capacitance. The short-circuit protection is activated in a delayed manner by a delayed switching. The switching device is thus less susceptible to short-term voltage fluctuations after switching on the switching device.
According to an advantageous embodiment, the first transistor and/or the second transistor and/or the third transistor are/is designed as field effect transistors with insulated control electrodes, in particular as p-channel MOSFET transistors. In this case, the switching device can advantageously be designed compact.
In an electrical energy storage system, the core of the invention is that the electrical energy storage system has a switching device as described above or according to any of the claims relating to a switching device and a voltage source.
The invention is based on the fact that the switching device is blocked and remains blocked from closing when the load resistor is short-circuited. The current may not be interrupted until the switching device is separated from the voltage source.
In normal operation of the electrical energy storage system, no additional voltage drop occurs due to the short-circuit protection. The working distance of the electrical energy storage system is thereby extended.
In a device and/or a vehicle, the core of the invention is that the device and/or the vehicle has at least one electrical energy storage system and a load resistor as described above or according to any one of the claims relating to an electrical energy storage system.
The invention is based on the fact that the switching device is blocked and remains blocked from closing when the load resistor is short-circuited. The current may not be interrupted until the switching device is separated from the voltage source.
In normal operation of the electrical energy storage system, no additional voltage drop occurs due to the short-circuit protection. The range of the device and/or the vehicle is thereby extended.
In a method for connecting a voltage source to a load resistor by means of a switching device, in particular as described above or according to any one of the claims relating to switching devices, the core of the invention is that short-circuit protection is activated when the switching device is switched on.
The invention is based on the fact that the switching device is blocked and remains blocked from closing when the load resistor is short-circuited.
In this case, it is advantageous if the short-circuit protection is activated with a delay. The switching device is thus less susceptible to short-term voltage fluctuations after switching on the switching device.
It is furthermore advantageous if the switching device remains closed in a self-closing manner when the load resistor is short-circuited. No additional voltage drop occurs based on the short-circuit protection.
After the short-circuit of the load resistor has been eliminated, the switching device advantageously remains blocked also from blocking, wherein the switching device can be switched off by means of the switch. In this case, it is advantageous if the switching device is in a defined state.
The above-described design and the extended design may be combined with each other arbitrarily, if appropriate. Other possible designs, extensions and embodiments of the invention also include combinations of features of the invention that were not explicitly mentioned in the foregoing or in the following description with reference to the examples. In this case, the person skilled in the art will also add various aspects as an improvement or supplement to the corresponding basic form of the invention.
Drawings
In the following section, the invention is illustrated by means of examples from which other inventive features can be derived, but the scope of the invention is not limited thereto. Embodiments are shown in the drawings.
In the figure:
Fig. 1 shows a schematic diagram of a wiring diagram of a switching device 1 according to the invention; and
Fig. 2 shows a pulse diagram of the operation of the switching device 1 according to the invention.
Detailed Description
The switching device 1 for conductively connecting a voltage source V to a load resistor RL has:
A first transistor T1 which is connected to the first transistor,
A second transistor T2 which is connected to the first transistor,
A third transistor T3 which is arranged to be connected to the first transistor,
A first resistance R1 which is chosen to be chosen,
A second resistance R2 which is chosen to be chosen,
The capacitance C of the capacitor C,
-Controlling the voltage source, and
A switch S for switching the control voltage source.
The transistors (T1, T2, T3) are preferably designed as field effect transistors with insulated control electrodes, in particular as p-channel MOSFET transistors.
The first transistor T1 is arranged between the voltage source V and the load resistor RL. The Source (Source) of the first transistor T1 is electrically conductively connected to a voltage Source V. The Drain (Drain) of the first transistor T1 is conductively connected to a load resistor RL. The control electrode of the first transistor T1 is conductively connected to a switch S.
A first intermediate tap 2 is arranged between the voltage source V and the source of the first transistor T1. The first intermediate tap 2 conductively connects the voltage source V and the source of the first transistor T1 with the source of the second transistor T2.
A second intermediate tap 3 is arranged between the drain of the first transistor T1 and the load resistor RL. The second intermediate tap 3 conductively connects the load resistor RL and the drain of the first transistor T1 with the control electrode of the second transistor T2.
A third intermediate tap 4 is arranged between the control electrode of the first transistor T1 and the switch S. The third intermediate tap 4 can be connected to the drain of the second transistor T2 in an electrically conductive manner by means of a third transistor T3. Here, the third intermediate tap 4 is conductively connected to the drain of the third transistor T3. The source of the third transistor T3 is conductively connected to the drain of the second transistor T2. The control electrode of the third transistor T3 is conductively connected to the capacitor C.
The second transistor T2 and the third transistor T3 thus form a series circuit. The first resistor R1 is arranged in parallel with a series circuit constituted by the second transistor T2 and the third transistor T3. The first resistor R1 connects a fourth intermediate tap 5 arranged between the first intermediate tap 2 and the source of the second transistor T2 with a fifth intermediate tap 6 arranged between the third intermediate tap 4 and the switch S.
A sixth intermediate tap 7 is arranged between the control electrode of the third transistor T3 and the capacitance C. A seventh intermediate tap 8 is arranged between the fifth intermediate tap 6 and the switch S. The second resistor R2 conductively connects the sixth intermediate tap 7 with the seventh intermediate tap 8.
A control voltage source is arranged between the capacitor C and the switch S.
Fig. 2 shows a pulse diagram of the operating mode of the switching device 1. The supply voltage UV of the voltage source V, the voltage UR across the load resistor RL, the value of the load resistor RL and the control voltage US at the switch S are shown here as a function of time t.
At time t0, switch S is closed, and the control voltage US at switch S is negative and-20V. The supply voltage UV is equal to the voltage UR across the load resistor RL and is 12V. The value of the load resistor RL is constant. The first transistor T1 is conductive and conductively connects the voltage source V with the load resistor RL.
At time t1, switch S is open, and the control voltage US at switch S is positive and +20v. The first transistor T1 is locked. The voltage source V is thus separated from the load resistor RL. The voltage UL across the load resistor RL is switched to 0V with a delay. The capacitor C is charged through the first resistor R1 and the second resistor R2 and the third transistor T3 is latched. The value of the load resistor RL is constant.
At time t2, switch S is closed and control voltage US is switched to-20V. The first transistor T1 is conductive and the voltage UL across the load resistor RL increases stepwise from 0V to 12V. The value of the load resistor RL is constant. The second transistor T2 is blocked. The third transistor T3 is turned on with a delay, thus activating the short-circuit protection of the switching device. The duration of the delay in switching off the third transistor T3 depends here on the choice of the capacitor C and the value of the second resistor R2.
At time t3, a short circuit occurs at load resistor RL, and the value of load resistor RL decreases stepwise. The second transistor T2 is turned on. The first transistor T1 is locked. The voltage UL at the load resistor RL thus decreases stepwise. Since the third transistor T3 has been turned on, the control electrode of the first transistor T1 is conductively connected to the voltage source V and the first transistor T1 is also blocked, so the second transistor T2 remains turned on. Thus, a self-blocking effect of the switching device 1 occurs. The supply voltage UV is constantly maintained at 12V. The voltage UL at the load resistor RL is negligible.
At time t4, after eliminating the short circuit on the load resistor RL, the switch S is opened, and the value of the load resistor RL thus rises stepwise to the original value. The control voltage US at the switch S is positive and +20v. The supply voltage UV is constantly maintained at 12V. The voltage UL at the load resistor RL is negligible. The switching device 1 thus shifts to the off state, and the self-closing of the switching device 1 ends.
At time t5, switch S is closed, and the control voltage US at switch S is negative and-20V. The first transistor T1 is turned on and the voltage UL across the load resistor RL increases stepwise from 0V to 12V. The value of the load resistor RL is constant. The second transistor T2 is blocked. The third transistor T3 is turned on with a delay, thus activating the short-circuit protection of the switching device again.
As voltage source V, for example, an electrical energy store can be used. An electrical energy store is understood to mean an energy store that can be charged repeatedly, in particular an electrochemical energy store cell and/or an energy store module having at least one electrochemical energy store cell and/or an energy store pack having at least one energy store module. The energy storage cells can be designed as lithium-based cells, in particular lithium-ion cells. The energy storage cells are alternatively designed as lithium-polymer cells or nickel-metal hydride cells or lead-acid cells or lithium-air cells or lithium-sulfur cells.
Claims (13)
1. Switching device (1) for the electrically conductive connection of a voltage source (V) to a load Resistor (RL),
It is characterized in that the method comprises the steps of,
A switching device (1) is provided with:
-a first transistor (T1),
-A second transistor (T2),
A third transistor (T3),
-Capacitance (C), and
A switch (S),
Wherein the voltage source (V) can be connected to the load Resistor (RL) in an electrically conductive manner by means of a first transistor (T1),
Wherein the first transistor (T1) can be switched by means of a switch (S) or by means of a second transistor (T2) and a third transistor (T3),
Wherein the third transistor (T3) can be switched by means of a capacitor (C),
Wherein the second transistor (T2) is arranged such that it switches when the load Resistor (RL) is shorted,
Wherein the switching device (1) has a first resistor (R1) and a second resistor (R2), wherein the switching device (1) is provided for charging the capacitor (C) via the first resistor (R1) and the second resistor (R2), and wherein the first resistor (R1) is arranged in parallel with a series circuit in which the second transistor (T2) and the third transistor (T3) are arranged.
2. Switching device (1) according to claim 1, characterized in that the second resistor (R2) is arranged between the control electrode of the third transistor (T3) and the switch (S).
3. Switching device (1) according to claim 1 or 2, characterized in that the second resistor (R2) is arranged between the capacitor (C) and the switch (S).
4. Switching device (1) according to claim 1 or 2, characterized in that the switching device (1) is designed such that the third transistor (T3) is switched in a delayed manner in accordance with the switch (S).
5. Switching device (1) according to claim 4, characterized in that the duration of the delay is dependent on the size of the second resistor (R2) and the size of the capacitor (C).
6. Switching device (1) according to claim 1 or 2, characterized in that the first transistor (T1) and/or the second transistor (T2) and/or the third transistor (T3) are designed as field effect transistors with insulated control electrodes.
7. Switching device (1) according to claim 6, characterized in that the first transistor (T1) and/or the second transistor (T2) and/or the third transistor (T3) are designed as p-channel MOSFET transistors.
8. Electrical energy storage system, characterized in that the electrical energy storage system has a switching device (1) according to any one of claims 1 to 7 and a voltage source (V).
9. Vehicle having at least one electrical energy storage system according to claim 8 and a load Resistor (RL).
10. Method for connecting a voltage source (V) with a load Resistor (RL) by means of a switching device (1) according to any one of claims 1 to 7,
Characterized in that the short-circuit protection is activated when the switching device (1) is switched on.
11. The method of claim 10, wherein the short-circuit protection is activated with a delay.
12. Method according to claim 10 or 11, characterized in that the switching device (1) is closed off from the closing when the load Resistor (RL) is short-circuited.
13. Method according to claim 12, characterized in that the switching device (1) is also closed off from the blocking after the short-circuit of the load Resistor (RL) has been eliminated, wherein the switching device can be switched off by means of a switch (S).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018212708.5A DE102018212708A1 (en) | 2018-07-31 | 2018-07-31 | Switching device, electrical energy storage system, device and / or vehicle and method for connecting a voltage source to a load resistor by means of a switching device |
| DE102018212708.5 | 2018-07-31 | ||
| PCT/EP2019/068513 WO2020025271A1 (en) | 2018-07-31 | 2019-07-10 | Switching device, electrical energy storage system, device and/or vehicle and method for connecting a voltage source to a load resistance by means of a switching device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112470402A CN112470402A (en) | 2021-03-09 |
| CN112470402B true CN112470402B (en) | 2024-09-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980050941.7A Active CN112470402B (en) | 2018-07-31 | 2019-07-10 | Switching device, electrical energy storage system, device and/or vehicle and method for connecting a voltage source to a load resistor |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN112470402B (en) |
| DE (1) | DE102018212708A1 (en) |
| WO (1) | WO2020025271A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325466B (en) * | 2021-11-25 | 2022-11-18 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Generator outlet mutual inductor turn-to-turn short circuit self-checking system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012123276A1 (en) * | 2011-03-17 | 2012-09-20 | Sb Limotive Germany Gmbh | Device for deactivating a power transistor |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3536925A1 (en) * | 1985-10-17 | 1987-04-23 | Balluff Gebhard Feinmech | TWO-WIRE SWITCH WITH A POWER TRANSISTOR |
| DE19914466C1 (en) * | 1999-03-30 | 2000-09-14 | Siemens Ag | Driver stage for switching load for motor vehicle door control |
| DE19936857A1 (en) * | 1999-08-05 | 2001-02-15 | Siemens Ag | Protection circuit for an electrical switching element |
| US20070127180A1 (en) * | 2005-12-05 | 2007-06-07 | Yingjie Lin | Short circuit protection for vehicle driver circuit |
| DE202006002762U1 (en) * | 2006-02-21 | 2006-05-04 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Circuit for switching a voltage-controlled transistor |
| CN103474967A (en) * | 2012-06-07 | 2013-12-25 | 苏州赛芯电子科技有限公司 | Highly-integrated battery protection circuit |
| FR2991779B1 (en) * | 2012-06-12 | 2014-07-11 | Commissariat Energie Atomique | BATTERY OF ACCUMULATORS PROTECTED AGAINST SHORT CIRCUITS EXTERNAL |
| DE102014205116A1 (en) * | 2014-03-19 | 2015-09-24 | Robert Bosch Gmbh | A battery cell device having a battery cell and a current limiting circuit, and a method of limiting a current flowing across the battery cell and the battery cell terminals of the battery cell |
-
2018
- 2018-07-31 DE DE102018212708.5A patent/DE102018212708A1/en active Pending
-
2019
- 2019-07-10 CN CN201980050941.7A patent/CN112470402B/en active Active
- 2019-07-10 WO PCT/EP2019/068513 patent/WO2020025271A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012123276A1 (en) * | 2011-03-17 | 2012-09-20 | Sb Limotive Germany Gmbh | Device for deactivating a power transistor |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018212708A1 (en) | 2020-02-06 |
| WO2020025271A1 (en) | 2020-02-06 |
| CN112470402A (en) | 2021-03-09 |
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