CN112470402A - 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
- CN112470402A CN112470402A CN201980050941.7A CN201980050941A CN112470402A CN 112470402 A CN112470402 A CN 112470402A CN 201980050941 A CN201980050941 A CN 201980050941A CN 112470402 A CN112470402 A CN 112470402A
- Authority
- CN
- China
- Prior art keywords
- transistor
- switching device
- resistor
- switch
- voltage source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004146 energy storage Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims abstract description 15
- 230000005669 field effect Effects 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims 1
- 210000004027 cell Anatomy 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000003213 activating effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- JDZCKJOXGCMJGS-UHFFFAOYSA-N [Li].[S] Chemical compound [Li].[S] JDZCKJOXGCMJGS-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 210000000352 storage cell Anatomy 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Protection Of Static Devices (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to a switching device (1) for electrically conductively connecting 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) comprises: a first transistor (T1), a second transistor (T2), a third transistor (T3), a capacitor (C), and a switch (S), wherein a voltage source (V) can be connected in an electrically conductive manner 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 capacitor (C), wherein the second transistor (T2) is arranged such that it switches when the load Resistor (RL) is short-circuited.
Description
Technical Field
The 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 preambles of the independent claims.
Background
CN 103474967 a shows a highly integrated battery safety circuit.
US 2015/0180091 shows a battery protected against external short-circuits.
Disclosure of Invention
In a switching device for electrically conductively connecting a voltage source to a load resistor, the core of the invention is that the switching device comprises:
-a first transistor for controlling the voltage of the first transistor,
-a second transistor
-a third transistor
-a capacitance, and
-a switch for switching the switching of the switching means,
wherein the voltage source can be conductively connected to the load resistor by means of the first transistor,
wherein the first transistor can be switched by means of a switch or by means of the second and third transistor,
wherein the third transistor can be switched by means of a capacitor,
wherein the second transistor is arranged such that it switches when the load resistance is short-circuited.
The invention is based on the idea of being able to connect a voltage source to a load resistor in an electrically conductive manner by means of a switching device. In the event of a short circuit of the load resistor, the third transistor is also switched on and the first transistor is switched on in addition to the already switched on second transistor, so that this first transistor is latched and remains latched self-blocking. The current may not be interrupted until the switching device is disconnected from the voltage source.
The advantage here is that, in the normal operation of the switching device, no additional voltage drop occurs due to the short-circuit protection.
Further advantageous embodiments of the invention are the subject matter of the dependent claims.
In an advantageous embodiment, the switching device has a first resistor and a second resistor, the switching device being provided to charge the capacitor via the first resistor and the second resistor. The capacitor can thus be charged during operation of the switching device.
It is advantageous here if the second transistor and the third transistor are arranged in a series circuit. Thus, when the second transistor and the third transistor are turned on, the first transistor is turned on.
The first resistor is advantageously arranged in parallel with the series circuit. 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 a second resistor is arranged between the capacitance and the switch.
The switching device is advantageously designed such that the third transistor switches in a time-delayed manner as a function of the switch, in particular wherein the duration of the time delay is dependent on the size of the second resistor and the size of the capacitor. The short-circuit protection is activated in a delayed manner by means of a delayed switch. The switching device is therefore 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 an insulated control electrode, in particular as p-channel MOSFET transistors. It is advantageous here that the switching device can be designed to be 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 the switching device and a voltage source.
The invention is based on the insight that the switching device is latched and remains latched self-closing when the load resistor is short-circuited. The current may not be interrupted until the switching device is disconnected from the voltage source.
During normal operation of the electrical energy storage system, no additional voltage drop occurs due to the short-circuit protection. The operating distance of the electrical energy storage system is thereby extended.
The invention is based on the idea of providing a device and/or a vehicle with at least one electrical energy storage system and a load resistor as described above or according to any of the claims relating to an electrical energy storage system.
The invention is based on the insight that the switching device is latched and remains latched self-closing when the load resistor is short-circuited. The current may not be interrupted until the switching device is disconnected from the voltage source.
During normal operation of the electrical energy storage system, no additional voltage drop occurs due to the short-circuit protection. The working distance 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 a switching device as described above or according to any of the claims relating to a switching device, the core of the invention is that a short-circuit protection is activated when the switching device is switched on.
The invention is based on the insight that the switching device is latched and remains latched self-closing when the load resistor is short-circuited.
It is advantageous here to activate the short-circuit protection with a delay. The switching device is therefore less susceptible to short-term voltage fluctuations after switching on the switching device.
It is also advantageous if the switching device remains latched in a self-blocking manner in the event of a short circuit of the load resistor. No additional voltage drop occurs on the basis of the short-circuit protection.
After the short circuit of the load resistor has been eliminated, the switching device is advantageously also latched closed in a self-closing manner, wherein the switching device can be switched off by means of a switch. It is advantageous here if the switching device is in a defined state.
The above-described designs and further designs can be combined with one another as desired, if appropriate. Other possible embodiments, further embodiments and implementations of the invention also include combinations of features of the invention which are not explicitly mentioned in the foregoing or in the following with reference to the examples. In particular, the person skilled in the art will add various aspects as an improvement or supplement to the corresponding basic form of the invention.
Drawings
In the following section, the invention is explained by means of examples from which further inventive features can be derived, without the scope of the invention being limited thereto. Embodiments are shown in the drawings.
In the figure:
fig. 1 shows a schematic diagram of a connection diagram of a switching device 1 according to the invention; and is
Fig. 2 shows a pulse diagram of the operating mode of the switching device 1 according to the invention.
Detailed Description
The switching device 1 for electrically conductively connecting a voltage source V to a load resistor RL has:
-a first transistor T1,
-a second transistor T2,
-a third transistor T3,
-a first resistance R1,
-a second resistance R2,
-a capacitance C of the capacitor,
-controlling the voltage source, and
-a switch S for switching a 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 resistance RL. The Source (Source) of the first transistor T1 is connected in an electrically conductive manner to a voltage Source V. The Drain (Drain) of the first transistor T1 is conductively connected to the load resistor RL. The control electrode of the first transistor T1 is conductively connected to the 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 resistance RL. The second intermediate tap 3 conductively connects the load resistance 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 conductively connected to the drain of the second transistor T2 by means of a third transistor T3. The third center tap 4 is connected in an electrically conductive manner to the drain of a 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. A 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. A second resistor R2 electrically conductively connects sixth intermediate tap 7 to 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 resistance RL, the value of the load resistance 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 resistance RL and is 12V. The value of the load resistance RL is constant. The first transistor T1 is conductive and conductively connects the voltage source V to the load resistor RL.
At time t1, switch S is opened, and control voltage US at switch S is positive and + 20V. The first transistor T1 is latched. The voltage source V is thus separated from the load resistance RL. The voltage UL across the load resistance RL switches to 0V with a delay. The capacitor C is charged by the first resistor R1 and the second resistor R2 and the third transistor T3 is latched. The value of the load resistance RL is constant.
At a point in time t2, the switch S is closed and the control voltage US is switched to-20V. The first transistor T1 is conductive and the voltage UL across the load resistance RL rises stepwise from 0V to 12V. The value of the load resistance RL is constant. The second transistor T2 is latched. 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 turning 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 the load resistance RL, and the value of the load resistance RL decreases stepwise. The second transistor T2 is turned on. The first transistor T1 is latched. The voltage UL at the load resistance RL therefore decreases stepwise. Since the third transistor T3 has already been switched on, the control electrode of the first transistor T1 is conductively connected to the voltage source V and the first transistor T1 is also latched, so that the second transistor T2 remains switched on. The self-blocking effect of the switching device 1 thus occurs. The supply voltage UV is constantly maintained at 12V. The voltage UL at the load resistance RL is negligible.
At time t4, after the short circuit across the load resistance RL is eliminated, the switch S is opened, and the value of the load resistance RL thus rises stepwise to the initial 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 resistance RL is negligible. The switching device 1 is therefore switched to the off state, and the self-blocking of the switching device 1 is ended.
At time t5, switch S is closed and the control voltage US at switch S is negative and-20V. The first transistor T1 is switched on and the voltage UL across the load resistance RL rises stepwise from 0V to 12V. The value of the load resistance RL is constant. The second transistor T2 is latched. The third transistor T3 is turned on with a delay, thus activating the short-circuit protection of the switching device.
For example, an electrical energy store can be used as the voltage source V. Electrical energy stores are understood here to mean rechargeable energy stores, in particular electrochemical energy store cells and/or energy store modules having at least one electrochemical energy store cell and/or energy store packs having at least one energy store module. The energy storage cells can be designed as lithium-based cells, in particular as lithium-ion cells. The energy storage unit is alternatively designed into a lithium-polymer battery unit or a nickel-metal hydride battery unit or a lead-acid battery unit or a lithium-air battery unit or a lithium-sulfur battery unit.
Claims (14)
1. Switching device (1) for electrically conductively connecting a voltage source (V) to a load Resistor (RL),
it is characterized in that the preparation method is characterized in that,
a switch device (1) is provided with:
-a first transistor (T1),
-a second transistor (T2),
-a third transistor (T3),
-a capacitance (C), and
-a switch (S),
wherein a voltage source (V) can be connected in an electrically conductive manner to the load Resistor (RL) by means of a 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 a capacitor (C),
wherein the second transistor (T2) is arranged such that it switches when the load Resistance (RL) is short-circuited.
2. Switching device (1) according to claim 1, characterized in that 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 a first and a second resistor (R1, R2).
3. The switching device (1) according to any one of the preceding claims, wherein the second transistor (T2) and the third transistor (T3) are arranged in a series circuit.
4. A switching device (1) according to claim 3, characterized in that said first resistor (R1) is arranged in parallel with said series circuit.
5. The switching device (1) according to any one of claims 2 to 4, wherein the second resistor (R2) is arranged between the control electrode of the third transistor (T3) and the switch (S).
6. Switching device (1) according to any of claims 2 to 5, characterized in that said second resistance (R2) is arranged between said capacitor (C) and said switch (S).
7. Switching device (1) according to one of the claims 2 to 6, characterized in that the switching device (1) is designed such that the third transistor (T3) switches with a delay according to the switch (S),
in particular wherein the duration of the delay depends on the magnitude of the second resistance (R2) and the magnitude of the capacitance (C).
8. The switching device (1) according to one of the preceding claims, 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 an insulated control electrode, in particular as p-channel MOSFET transistors.
9. Electrical energy storage system, characterized in that it has a switching device (1) according to any of the preceding claims and a voltage source (V).
10. Device and/or vehicle having at least one electrical energy storage system according to claim 9 and a load Resistor (RL).
11. Method for connecting a voltage source (V) to a load Resistance (RL) by means of a switching device (1), in particular according to one of claims 1 to 8,
characterized in that the short-circuit protection is activated when the switching device (1) is switched on.
12. The method of claim 11, wherein the short circuit protection is activated with a delay.
13. Method according to claim 11 or 12, characterized in that the switching device (1) is latched self-blocking in the event of a short circuit of the load Resistance (RL).
14. Method according to claim 13, characterized in that the switching device (1) is also self-blocking after the short circuit of the load Resistance (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 |
|---|---|---|---|
| DE102018212708.5 | 2018-07-31 | ||
| 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 |
| 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 (1)
| Publication Number | Publication Date |
|---|---|
| CN112470402A true CN112470402A (en) | 2021-03-09 |
Family
ID=67253897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980050941.7A Pending CN112470402A (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) | CN112470402A (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 (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4780788A (en) * | 1985-10-17 | 1988-10-25 | Gebhard Balluff Fabrik Feinmechanischer Erzeugnisse Gmbh & Co. | 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 |
| US20090066400A1 (en) * | 2006-02-21 | 2009-03-12 | Klaus Fischer | Circuit for Switching a Voltage-Controlled Transistor |
| WO2012123276A1 (en) * | 2011-03-17 | 2012-09-20 | Sb Limotive Germany Gmbh | Device for deactivating a power transistor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 WO PCT/EP2019/068513 patent/WO2020025271A1/en active Application Filing
- 2019-07-10 CN CN201980050941.7A patent/CN112470402A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4780788A (en) * | 1985-10-17 | 1988-10-25 | Gebhard Balluff Fabrik Feinmechanischer Erzeugnisse Gmbh & Co. | 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 |
| US20090066400A1 (en) * | 2006-02-21 | 2009-03-12 | Klaus Fischer | Circuit for Switching a Voltage-Controlled Transistor |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6881707B2 (en) | BMS wakeup device, BMS including it and battery pack | |
| KR102246769B1 (en) | The battery pack and a vacuum cleaner including the same | |
| US8659267B2 (en) | Battery pack and over-discharge protecting method thereof | |
| US10277064B2 (en) | Power tool and control method thereof | |
| US9054538B2 (en) | Battery management system | |
| KR102371194B1 (en) | Power Providing System For Vehicle | |
| EP2983268B1 (en) | Battery system | |
| US9643506B2 (en) | Portable backup charger | |
| CN101047321B (en) | Lithium battery pack and electric tool | |
| KR20200137965A (en) | Secondary battery protection circuit, secondary battery protection device, battery pack and method of controlling secondary battery protection circuit | |
| JP3102496U (en) | Secondary battery circuit device | |
| JPH04331425A (en) | Overcharge preventing device and overdischarge preventing device | |
| JPH11242966A (en) | Protecting method for battery pack and device therefor | |
| TW201218576A (en) | Dc power supply device | |
| CN105680505A (en) | Vehicle emergency starting device | |
| US20110248676A1 (en) | Battery pack | |
| JP2001112182A (en) | Protective circuit for secondary battery | |
| CN112470402A (en) | Switching device, electrical energy storage system, device and/or vehicle and method for connecting a voltage source to a load resistor | |
| US20110025274A1 (en) | Energy accumulator | |
| JPH09308114A (en) | Charge and discharge controller for battery | |
| EP3560060B1 (en) | High power flash battery system and method thereof | |
| EP3955411A1 (en) | Pre-charge circuit and battery system having same | |
| JPH11185824A (en) | Primary battery compatible battery pack | |
| KR102161289B1 (en) | External battery | |
| EP4167428A1 (en) | Circuit device for protecting battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |