CN114301112B - Portable energy storage system and electric appliance - Google Patents
Portable energy storage system and electric appliance Download PDFInfo
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- CN114301112B CN114301112B CN202111460656.8A CN202111460656A CN114301112B CN 114301112 B CN114301112 B CN 114301112B CN 202111460656 A CN202111460656 A CN 202111460656A CN 114301112 B CN114301112 B CN 114301112B
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- 238000004146 energy storage Methods 0.000 title claims abstract description 67
- 238000011084 recovery Methods 0.000 abstract description 15
- 238000010586 diagram Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Protection Of Static Devices (AREA)
Abstract
本发明公开了一种便携式储能系统及电器，所述便携式储能系统包括:用于提供电能的电池模块、用于连接负载的输出模块，还包括连接于所述电池模块与所述输出模块之间的电池保护模块，所述电池保护模块用于检测所述便携式储能系统是否过载短路，并于所述便携式储能系统过载短路时自恢复所述便携式储能系统。与现有技术相比，本发明能实现便携式储能系统的短路保护、以及输出端过载之后的自恢复。
The present invention discloses a portable energy storage system and an electrical appliance, wherein the portable energy storage system comprises: a battery module for providing electrical energy, an output module for connecting a load, and a battery protection module connected between the battery module and the output module, wherein the battery protection module is used to detect whether the portable energy storage system is overloaded and short-circuited, and to self-restore the portable energy storage system when the portable energy storage system is overloaded and short-circuited. Compared with the prior art, the present invention can realize short-circuit protection of the portable energy storage system and self-recovery after the output end is overloaded.
Description
Technical Field
The invention relates to a portable power supply, in particular to a portable energy storage system and an electric appliance.
Background
In the use process of the portable power supply product, the output end is short-circuited due to improper use, and the charge-discharge MOS tube is controlled to be disconnected through the battery management IC so as to carry out short-circuit protection, a specific switch is required to be introduced for short-circuit protection recovery, and the portable power supply product is reset by manual operation, so that the cost is high and the operation is troublesome.
Therefore, how to design a portable energy storage system and an electrical apparatus, so that the self-recovery circuit can operate when the output end of the portable power supply is overloaded and short-circuited is a technical problem to be solved in the industry.
Disclosure of Invention
Aiming at the problems of high cost and troublesome operation caused by the fact that a specific switch is required to be introduced and manual operation is required to reset during short-circuit of the output end of a portable power supply in the prior art, the invention provides a portable energy storage system and an electric appliance.
The technical scheme of the invention is that the portable energy storage system comprises a battery module for providing electric energy, an output module for connecting a load, and a battery protection module connected between the battery module and the output module, wherein the battery protection module is used for detecting whether the portable energy storage system is in overload short circuit or not and recovering the portable energy storage system when the portable energy storage system is in overload short circuit.
Further, the battery protection module includes:
The voltage dividing unit is connected between the battery module and the output module and is used for dividing voltage so as to change the voltage output by the battery module to the output module;
The first control unit is used for detecting output parameters of the battery module and input parameters of the output module, judging whether the portable energy storage system is in overload short circuit or not according to the output parameters and the input parameters, and conducting the voltage dividing unit when the portable energy storage system is in overload short circuit.
Further, the output module comprises an interface module connected with a direct current load and an inversion module connected with an alternating current load;
the voltage division unit comprises a first voltage division circuit connected between the battery module and the interface module, and a second voltage division circuit connected between the battery module and the inversion module.
Further, the first voltage dividing circuit comprises a voltage dividing resistor R1 and a voltage dividing resistor R2 which are connected in series between the battery module and the interface module, and a normally closed relay K1 which is connected in parallel with two ends of the voltage dividing resistor R1 and the voltage dividing resistor R2.
Further, the second voltage dividing circuit comprises a voltage dividing resistor R3 and a voltage dividing resistor R4 which are connected in series between the battery module and the inversion module, and a normally closed relay K2 which is connected in parallel between the voltage dividing resistor R3 and the voltage dividing resistor R4.
Further, the first control unit is further connected to two ends of the voltage dividing resistor R1, when the portable energy storage system is in overload short circuit, the first control unit controls the normally closed relay K1 to be opened, detects voltages at two ends of the voltage dividing resistor R1, and controls the normally closed relay K1 to be closed when the voltages at two ends of the voltage dividing resistor R1 are lower than a first preset voltage.
Further, the first control unit is further connected to two ends of the voltage dividing resistor R3, when the portable energy storage system is in overload short circuit, the first control unit controls the normally closed relay K2 to be opened, detects voltages at two ends of the voltage dividing resistor R3, and controls the normally closed relay K2 to be closed when the voltages at two ends of the voltage dividing resistor R3 are lower than a second preset voltage.
Further, the battery protection module further comprises a second control unit connected to the output end of the battery module, wherein the second control unit is used for detecting the single voltage of each battery in the battery module and the total current output by the battery module, and adjusting the working state of the battery module to avoid battery damage when the battery module fails.
Further, the second control unit comprises at least one switching tube connected in series with the output end of the battery module and a battery management IC for detecting the single voltage and the total current, and the battery management IC can also adjust the charge and discharge states of the switching tube when the battery module fails so as to adjust the working state of the battery module.
Further, the resistance values of the voltage dividing resistor R1, the voltage dividing resistor R2, the voltage dividing resistor R3 and the voltage dividing resistor R4 are selected according to the short-circuit protection threshold set by the portable energy storage system and the impedance of the output end.
Further, the output parameter is an output voltage of the battery module, and the input parameter is an input voltage of the output module.
The invention further provides an electric appliance, and the portable energy storage system is adopted by the electric appliance.
Further, the electric appliance is an air conditioner.
Compared with the prior art, the invention has at least the following beneficial effects:
Whether the portable energy storage system is in overload short circuit or not can be detected through the battery protection module, load can be unloaded and circuit self-recovery can be achieved when the portable energy storage system is in overload short circuit, and user experience is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a portable energy storage system according to the present invention;
FIG. 2 is a schematic diagram of a circuit connection of the portable energy storage system of the present invention;
FIG. 3 is a schematic diagram illustrating the connection of the first voltage divider circuit according to the present invention;
FIG. 4 is a schematic diagram illustrating the connection of the first voltage divider circuit when the output end of the portable energy storage system is shorted;
fig. 5 is a schematic diagram illustrating connection of the first voltage dividing circuit when the output end of the portable energy storage system of the present invention is working normally.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Thus, reference throughout this specification to one feature will be used in order to describe one embodiment of the invention, not to imply that each embodiment of the invention must be in the proper motion. Furthermore, it should be noted that the present specification describes a number of features. Although certain features may be combined together to illustrate a possible system design, such features may be used in other combinations not explicitly described. Thus, unless otherwise indicated, the illustrated combinations are not intended to be limiting.
The principles and structures of the present invention are described in detail below with reference to the drawings and the examples.
In the use process of the portable power supply product, the output end is short-circuited easily due to improper use, the battery management IC controls the charge-discharge MOS tube to be disconnected so as to carry out short-circuit protection, and then a specific switch is required to be introduced for short-circuit protection recovery, so that the portable power supply product is reset by manual operation, has higher cost and is complex to operate. The invention provides a portable energy storage system, which can realize the detection of overload short circuit and the self-recovery function of a circuit during overload short circuit of the portable energy storage system through the cooperation of a relay and a first control unit.
The portable energy storage system provided by the invention comprises:
The battery module is used for providing electric energy for the portable energy storage system;
The output module is used for connecting a load;
and the battery protection module is used for detecting whether the portable energy storage system is in overload short circuit or not and realizing self-recovery when the portable energy storage system is in overload short circuit.
Wherein, the battery protection module may include at least:
The voltage dividing unit is connected between the battery module and the output module and used for dividing voltage so as to change the voltage output by the battery module to the output module;
the first control unit is used for detecting the output parameters of the battery module and the input parameters of the output module, judging whether the portable energy storage system is in overload short circuit or not according to the output parameters and the input parameters, and conducting the voltage dividing unit when the portable energy storage system is in overload short circuit.
Referring to fig. 1, the output module includes an interface module connected with a dc load and an inverter module connected with an ac load, and for matching the interface module and the inverter module, the voltage dividing unit includes a first voltage dividing circuit connected between the battery module and the interface module, and a second voltage dividing circuit connected between the battery module and the inverter module, where the conducting states of the first voltage dividing circuit and the second voltage dividing circuit are controlled by a first control unit, and the first control unit can make the first voltage dividing circuit and the second voltage dividing circuit conduct when the portable energy storage system is in overload short circuit.
Referring to fig. 3, the first voltage dividing circuit includes a voltage dividing resistor R1, a voltage dividing resistor R2 and a normally closed relay K1, wherein the voltage dividing resistor R1 and the voltage dividing resistor R2 are connected in series and then connected between the battery module and the interface module, the normally closed relay K1 is connected in parallel to two ends of the voltage dividing resistor R1 and the voltage dividing resistor R2, the normally closed relay K1 can be disconnected under the control of the first control unit, when the normally closed relay K1 is in a closed state, the normally closed relay K1 is equivalent to short-circuiting the voltage dividing resistor R1 and the voltage dividing resistor R2, at this time, the voltage dividing resistor R1 and the voltage dividing resistor R2 are not connected into a circuit, and when the normally closed relay K1 is disconnected under the control of the first control unit, the current output by the battery module can only flow out through the voltage dividing resistor R1 and the voltage dividing resistor R2, at this time, the voltage dividing resistor R1 and the voltage dividing resistor R2 are connected into the circuit, and the voltage dividing function is achieved.
Further, in order to realize the self-recovery function of the portable energy storage system, the first control unit is further connected to two ends of the voltage dividing resistor R1, when the portable energy storage system is in overload short circuit, the first control unit controls the normally closed relay K1 to be opened, then the voltages at two ends of the voltage dividing resistor R1 are detected, the voltages at two ends of the voltage dividing resistor R1 are compared with a first preset voltage, and when the voltages at two ends of the voltage dividing resistor are lower than the first preset voltage, the normally closed relay K1 is controlled to be closed, so that the circuit is self-recovered.
Referring to fig. 2, the second voltage dividing circuit includes a voltage dividing resistor R3, a voltage dividing resistor R4, and a normally closed relay K2, wherein the voltage dividing resistor R3 and the voltage dividing resistor R4 are connected in series and then connected between the battery module and the inverter module, the normally closed relay K2 is connected in parallel to two ends of the voltage dividing resistor R3 and the voltage dividing resistor R4, and the normally closed relay K2 can be disconnected under the control of the first control unit. The working principle of the normally closed relay K2 is the same as that of the first voltage dividing circuit, when the normally closed relay K2 is in a closed state, the normally closed relay K2 is equivalent to short-circuiting the voltage dividing resistor R3 and the voltage dividing resistor R4, the voltage dividing resistor R3 and the voltage dividing resistor R4 are not connected into the circuit, when the normally closed relay K2 is disconnected under the control of the first control unit, the current output by the battery module can only flow out through the voltage dividing resistor R3 and the voltage dividing resistor R4, and at the moment, the voltage dividing resistor R3 and the voltage dividing resistor R4 are connected into the circuit to play a voltage dividing role.
And in order to realize the self-recovery function of the portable energy storage system, the first control unit is further connected to the two ends of the voltage dividing resistor R3, when the portable energy storage system is in overload short circuit, the first control unit controls the normally closed relay K2 to be disconnected, then the voltages at the two ends of the voltage dividing resistor R3 are detected, the voltages at the two ends of the voltage dividing resistor R3 are compared with the second preset voltage, and when the voltages at the two ends of the voltage dividing resistor are lower than the second preset voltage, the normally closed relay K2 is controlled to be closed, so that the circuit is self-recovered.
It should be noted that the first voltage dividing circuit is used for realizing self-recovery at the interface module, that is, self-recovery under the short circuit of the output end of the portable energy storage system caused by overload of the direct current load, and the second voltage dividing circuit is used for realizing self-recovery at the inverter module, that is, self-recovery under the short circuit of the output end of the portable energy storage system caused by overload of the alternating current load. The output parameters collected by the first control unit are output voltage of the battery module, the input parameters are input voltage of the output module, the input voltage of the output module comprises input voltage of the interface module and input voltage of the inversion module, and when the input voltage is far smaller than the output voltage or zero, the output end of the portable energy storage system is indicated to have overload short circuit.
When the input voltage of the interface module is abnormal, the direct current load is indicated to be overloaded, the direct current load can be unloaded through the battery management IC, at the moment, the first control unit disconnects the normally closed relay K1 to enable the divider resistor R1 and the divider resistor R2 to be connected into a circuit, voltage division is further carried out, overload of the direct current load is avoided, the first control unit simultaneously detects the voltages at two ends of the divider resistor R1, when the voltages at two ends of the divider resistor R1 are lower than a first preset voltage, the circuit is restored to be normal, the first control unit controls the normally closed relay K1 to be closed, and the divider resistor R1 and the divider resistor R2 are shielded, so that a self-restoring function is realized. When the input voltage of the inverter module is abnormal, the overload of the ac load is indicated, and the control mode under the condition is the same as the control mode under the overload of the dc load, which is not described herein.
Further, the battery protection module further comprises a second control unit connected to the output end of the battery module, wherein the second control unit is used for detecting the single voltage of each battery in the battery module and the total current output by the battery module, adjusting the working state of the battery module, preventing the battery damage caused by over-current, over-charge and under-voltage of the battery, and prolonging the service life of the battery.
Referring to fig. 2, the second control unit includes at least one switching tube connected in series to the output end of the battery module, and a battery management IC for detecting the voltage and the total current of the unit cells, wherein the battery management IC can adjust the charge and discharge states of the switching tube connected to the output end of the battery module to adjust the working state of the battery module, thereby avoiding battery damage. Here, the battery management IC may further control the switching tube to be turned off to discharge the load when the overload short circuit occurs in the portable energy storage system, so as to perform the short circuit protection, and the battery management IC may cooperate with the first control unit to implement the self-recovery function. The switching tube in the second control unit is an MOS tube.
The working principle of the present invention is described below with reference to fig. 4 and 5:
When a load is connected, when the circuit works normally, the normally closed relay K1 is in a closed state, the voltage dividing resistor R1 and the voltage dividing resistor R2 are short-circuited, the equivalent circuit of the first voltage dividing circuit is shown in figure 5, the first control unit detects the voltage between the output ends B+ and B-of the battery module and the voltage between the input ends P+ and P-of the interface module, the voltages are approximately equal, the normally closed relay K1 is closed, and the circuit works normally;
When the circuit is in overload short circuit, the first control unit detects that the voltage at the P+ and P-positions of the input end of the interface module is 0 (or is far smaller than the voltage between the B+ and B-positions of the output end of the battery module), the first control unit judges that the portable energy storage system is in overload short circuit, the normally closed relay K1 is controlled to be disconnected, the equivalent circuit of the first voltage dividing circuit is shown in fig. 4, the output current of the battery module flows through the voltage dividing resistor R1 and the voltage dividing resistor R2, the voltage dividing resistor R1 divides the voltage, the first control unit collects the voltages at the two ends of the voltage dividing resistor R1, and meanwhile, the second control unit adjusts the charge and discharge states of the switching tube to remove overload loads.
After the load is removed, when the circuit is recovered, the voltage at two ends of the voltage dividing resistor R1 is lower than a first preset voltage, at the moment, the first control unit controls the normally closed relay K1 to be closed, the voltage dividing resistor R1 and the voltage dividing resistor R2 are shielded, and the circuit is recovered to work normally.
It should be noted that when the portable energy storage system has an overload short circuit, the output end is equivalent to the short circuit, and the resistor is 0, so that the circuit only divides the voltage through the voltage dividing resistor R1 and the voltage dividing resistor R2, and when the portable energy storage system returns to normal, the output end is connected to the circuit, the output end impedance of the circuit is connected to the circuit, and the voltage of the circuit is divided through the voltage dividing resistor R1, the voltage dividing resistor R2 and the output end impedance, so that the voltage division of the voltage dividing resistor R1 is reduced. Here, the first threshold voltage is determined according to the load type, and the resistance values of the voltage dividing resistor R1 and the voltage dividing resistor R2 are determined according to the first preset voltage and the output terminal impedance. The working principle of the second voltage dividing circuit is the same as that of the second voltage dividing circuit, and the resistance values of the voltage dividing resistor R3 and the voltage dividing resistor R4 are determined according to a second preset voltage and the impedance of the output end, and the first preset voltage and the second preset voltage are collectively called as a short-circuit protection threshold.
The invention further provides an electric appliance, and the portable energy storage system is adopted by the electric appliance.
Further, the electric appliance is an air conditioner.
Compared with the prior art, the portable energy storage system overload short circuit detection device has the advantages that whether the portable energy storage system is in overload short circuit or not can be detected through the battery protection module, the load can be unloaded when the portable energy storage system is in overload short circuit, the circuit self-recovery is realized, and the user experience is improved.
The above examples are provided for the purpose of illustrating the specific embodiments of the present invention, and it should be noted that it is possible for those skilled in the art to make several modifications and variations without departing from the spirit of the present invention, and these modifications and variations should be considered to be within the scope of the present invention.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111460656.8A CN114301112B (en) | 2021-12-02 | 2021-12-02 | Portable energy storage system and electric appliance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111460656.8A CN114301112B (en) | 2021-12-02 | 2021-12-02 | Portable energy storage system and electric appliance |
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| CN114301112A CN114301112A (en) | 2022-04-08 |
| CN114301112B true CN114301112B (en) | 2024-12-17 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2840439Y (en) * | 2005-10-13 | 2006-11-22 | 深圳桑达百利电器有限公司 | DC power supply load short-circuit self-restoring circuit |
| KR20160122349A (en) * | 2015-04-13 | 2016-10-24 | 엘에스산전 주식회사 | Limited fault current energy storage system in power grid |
| CN207652117U (en) * | 2017-11-17 | 2018-07-24 | 深圳市虹鹏能源科技有限责任公司 | A kind of portable energy-storing power-supply system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103802483B (en) * | 2013-12-26 | 2016-08-31 | 珠海艾派克微电子有限公司 | A kind of print cartridge, ink box chip and chip method for detecting short circuit |
| WO2016119116A1 (en) * | 2015-01-27 | 2016-08-04 | 华为技术有限公司 | Short circuit protection circuit |
| CN207098584U (en) * | 2017-06-29 | 2018-03-13 | 国网江西省电力公司南昌供电分公司 | Short-circuit protection and voluntarily restoring circuit |
| CN107294057B (en) * | 2017-08-16 | 2019-02-12 | 苏州易美新思新能源科技有限公司 | Protection device and method, power supply system |
| CN208522452U (en) * | 2018-06-05 | 2019-02-19 | 重庆斯微奇电子技术有限公司 | A kind of self- recoverage short-circuit protection circuit |
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- 2021-12-02 CN CN202111460656.8A patent/CN114301112B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2840439Y (en) * | 2005-10-13 | 2006-11-22 | 深圳桑达百利电器有限公司 | DC power supply load short-circuit self-restoring circuit |
| KR20160122349A (en) * | 2015-04-13 | 2016-10-24 | 엘에스산전 주식회사 | Limited fault current energy storage system in power grid |
| CN207652117U (en) * | 2017-11-17 | 2018-07-24 | 深圳市虹鹏能源科技有限责任公司 | A kind of portable energy-storing power-supply system |
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| CN114301112A (en) | 2022-04-08 |
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