CN1761119A - Control circuit for charging or discharging plug able dual batteries in portable type devices - Google Patents
Control circuit for charging or discharging plug able dual batteries in portable type devices Download PDFInfo
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- CN1761119A CN1761119A CN 200410051788 CN200410051788A CN1761119A CN 1761119 A CN1761119 A CN 1761119A CN 200410051788 CN200410051788 CN 200410051788 CN 200410051788 A CN200410051788 A CN 200410051788A CN 1761119 A CN1761119 A CN 1761119A
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- battery
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- back splint
- main battery
- charge
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- 238000007599 discharging Methods 0.000 title abstract description 6
- 230000009977 dual effect Effects 0.000 title 1
- 238000001514 detection method Methods 0.000 claims description 8
- 230000037431 insertion Effects 0.000 claims 2
- 238000003780 insertion Methods 0.000 claims 2
- 238000000034 method Methods 0.000 description 16
- 230000005611 electricity Effects 0.000 description 7
- 239000013585 weight reducing agent Substances 0.000 description 5
- 230000007812 deficiency Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Using plug-sensing unit for batteries senses plug states of main battery and back splint battery. Using sensing unit for DC power supply senses plug states of DC power supply. Using sensing unit for battery capacity senses capacities of main battery and back splint battery. Referencing the sensed results, microproceesor controls charging and discharging sequence for main battery and back splint battery in order to avoid exhausting both main battery and back splint battery, causing inconvenience. In addition, charging operation under DC power supply with specification of two times of electric power is not necessary.
Description
[technical field]
The invention relates to a kind of mancarried device, particularly relevant for the plugged double-battery charge charge/discharge control circuit in a kind of mancarried device.
[background technology]
Along with the prosperity of electronics technology, except the function of product constantly strengthened, its volume also constantly dwindled.Therefore, also constantly flourish as mobile phone, personal digital assistant various mancarried devices such as (Personal Digital Assistant are called for short PDA), and then bring very convenient living environment.
In mancarried device,, use the plug type battery to be used as its power supply usually in order to ensure the convenience that carries and use.Because the function of mancarried device is more and more strong, required electricity needs is also more and more big, so, can plug the scheme of double cell slot, become the optimal selection of this problem of solution.
Yet, the plugged double cell of existing mancarried device, because with the use in parallel of two batteries, so that when back splint battery (Jacket Battery) when electric energy exhausts, the electric energy of main battery also exhausts simultaneously, make that main battery also can't be kept perfectly electric power for use when user's desire removes the back splint battery with weight reduction.In addition, because the parallel connection of battery configuration, make the DC power supply of the mancarried device that is used for charging, also must reach the specification of twice capacity, cause bulky and expend cost.
[summary of the invention]
The object of the invention provides a kind of plugged double-battery charge charge/discharge control circuit of mancarried device, its may command back splint battery and main battery discharge in regular turn, during weight reduction, main battery still can be kept perfectly electric power for use when user's desire the back splint battery is removed.Also may command main battery and back splint battery charge in regular turn, and need not use the DC power supply of twice power specification.In addition, also with protection of the too high protection of battery temperature, battery over-discharge can and the battery functions such as protection that overcharge.
For reaching above-mentioned and other purpose, the invention provides a kind of double-battery charge charge/discharge control circuit that plugs, be applicable to mancarried device with pluggable main battery and back splint battery.This can plug the double-battery charge charge/discharge control circuit and comprise: battery insert-pull detection unit, direct current power supply detecting unit, battery capacity detecting unit, main battery charging control switch, main battery discharge control switch, back splint battery charge control switch, back splint battery discharge control switch and microcontroller.Wherein, battery insert-pull detection unit is in order to the plug state of detecting main battery and back splint battery, the direct current power supply detecting unit is in order to the plug state of the DC power supply of detecting mancarried device, and the battery capacity detecting unit is in order to the capacity of detecting main battery and back splint battery.The main battery charging control switch is in order to the charge circuit of control main battery, the main battery discharge control switch is in order to the discharge loop of control main battery, back splint battery charge control switch is in order to the charge circuit of control back splint battery, and back splint battery discharge control switch is in order to the discharge loop of control back splint battery.Microcontroller then couples battery insert-pull detection unit, direct current power supply detecting unit, battery capacity detecting unit, main battery charging control switch, main battery discharge control switch, back splint battery charge control switch and back splint battery discharge control switch, plug state in order to foundation main battery, back splint battery and DC power supply, and the capacity of main battery and back splint battery, control the conducting state of main battery charging control switch, main battery discharge control switch, back splint battery charge control switch and back splint battery discharge control switch.
In the preferred embodiment of the present invention, when microcontroller detects DC power supply when having inserted, as judging main battery for existing and off-capacity, conducting main battery charging control switch and close back splint battery charge control switch then, that is to say, main battery is charged.Otherwise represent main battery not exist, or main battery has been full of electricity, therefore, closed main battery charging control switch and conducting back splint battery charge control switch, so that the back splint battery is charged.
In the preferred embodiment of the present invention, when microcontroller detects DC power supply when having pulled out, as judge that the back splint battery is that existence and capacity are enough to power supply, conducting back splint battery discharge control switch and close the main battery discharge control switch then, that is to say, supply mancarried device required electric power by the back splint battery.Otherwise represent the back splint battery not exist, or the back splint battery electric power exhausts, therefore, close back splint battery discharge control switch and conducting main battery discharge control switch, and supply mancarried device required electric power by main battery.
In the preferred embodiment of the present invention, when microcontroller detects the back splint battery when having inserted, as judge main battery in pulling out, then conducting back splint battery charge control switch and back splint battery discharge control switch are supplied electric power so that the back splint battery charge is reached by the back splint battery.When microcontroller is judged main battery for existing and during off-capacity, conducting main battery charging control switch and close back splint battery charge control switch then is to charge to main battery.Otherwise represent main battery to be full of electricity, therefore, close main battery charging control switch and conducting back splint battery charge control switch, so that the back splint battery is charged.In addition, when microcontroller judged that the back splint battery capacity is enough to power, then conducting back splint battery discharge control switch and cut out the main battery discharge control switch supplied mancarried device required electric power by the back splint battery.Otherwise therefore the back splint battery electric power deficiency that representative is inserted, is closed back splint battery discharge control switch and conducting main battery discharge control switch, and is supplied mancarried device required electric power by main battery.
In the preferred embodiment of the present invention, when microcontroller detects the back splint battery when having pulled out, then conducting main battery charging control switch and main battery discharge control switch are with to the main battery charging and supply electric power by main battery.
In the preferred embodiment of the present invention, when microcontroller detects main battery when having inserted, as judging the back splint battery in pulling out, then conducting main battery charging control switch and main battery discharge control switch are so that charging reaches and supplies electric power by main battery to main battery.When microcontroller is judged the back splint battery for existing and capacity when being enough to power, then conducting back splint battery discharge control switch and cut out the main battery discharge control switch supplies mancarried device required electric power by the back splint battery.Otherwise represent back splint battery electric power deficiency, therefore, close back splint battery discharge control switch and conducting main battery discharge control switch, and supply mancarried device required electric power by main battery.In addition, when microcontroller was judged the main battery off-capacity, conducting main battery charging control switch and close back splint battery charge control switch then was to charge to main battery.Otherwise represent main battery to be full of electricity, therefore, close main battery charging control switch and conducting back splint battery charge control switch, so that the back splint battery is charged.
In the preferred embodiment of the present invention, when microcontroller detects main battery when having pulled out, then conducting back splint battery charge control switch and back splint battery discharge control switch are with to the back splint battery charge and supply electric power by the back splint battery.
In the preferred embodiment of the present invention; this can plug the double-battery charge charge/discharge control circuit and more comprise the battery temperature sensing unit; temperature in order to detecting main battery and back splint battery; with when temperature is too high; can select to close main battery charging control switch and back splint battery charge control switch via microcontroller, with the protection battery.
By in the above-mentioned explanation as can be known, the plugged double-battery charge charge/discharge control circuit of a kind of mancarried device provided by the present invention, not only may command back splint battery and main battery discharge in regular turn, the back splint battery is removed during weight reduction when user's desire, main battery still can be kept perfectly electric power for use, also may command main battery and back splint battery charge in regular turn, and need not use the DC power supply of twice power specification.In addition, also can reach the protection of the too high protection of battery temperature, battery over-discharge can and the battery functions such as protection that overcharge.
[description of drawings]
Fig. 1 shows the plugged double-battery charge charge/discharge control circuit calcspar of a kind of mancarried device of the preferred embodiment according to the present invention.
Fig. 2 shows the control flow chart of microcontroller detecting DC power supply plug.
Fig. 3 shows the control flow chart of microcontroller detecting back splint battery plug.
Fig. 4 shows the control flow chart of microcontroller detecting main battery plug.
[embodiment]
Please refer to shown in Figure 1, it is the plugged double-battery charge charge/discharge control circuit calcspar of a kind of mancarried device of the preferred embodiment according to the present invention, this can plug double-battery charge charge/discharge control circuit 100 and be applicable to that control has the mancarried device (not shown) of pluggable main battery and back splint battery, for example is mobile phone or PDA(Personal Digital Assistant) etc.
As shown in the figure, can plug double-battery charge charge/discharge control circuit 100 comprises: battery insert-pull detection unit 110, direct current power supply detecting unit 120, battery capacity detecting unit 130, battery temperature sensing unit 140, for example be main battery charging control switch 150, main battery discharge control switch 160, back splint battery charge control switch 170 and the back splint battery discharge control switch 180 of MOS transistor and for example be 8051 microcontroller 190.
Wherein, battery insert-pull detection unit 110 is in order to the plug state of detecting main battery and back splint battery, direct current power supply detecting unit 120 is in order to the plug state of the DC power supply of detecting mancarried device, battery capacity detecting unit 130 is in order to the capacity of detecting main battery and back splint battery, and battery temperature sensing unit 140 is in order to the temperature of detecting main battery and back splint battery.In addition, main battery charging control switch 150 is in order to the charge circuit of control main battery, main battery discharge control switch 160 is in order to the discharge loop of control main battery, back splint battery charge control switch 170 is in order to the charge circuit of control back splint battery, and back splint battery discharge control switch 180 is gone the same way in order to the discharge of control back splint battery.Microcontroller 190 then receives the detecting result of battery insert-pull detection unit 110, direct current power supply detecting unit 120, battery capacity detecting unit 130, battery temperature sensing unit 140 etc., so that control the conducting situation of main battery charging control switch 150, main battery discharge control switch 160, back splint battery charge control switch 170 and back splint battery discharge control switch 180 according to the result of detecting.
As previously mentioned, in order to control precedence discharge according to back splint battery and main battery, the back splint battery is removed during weight reduction when user's desire, the main battery electric power that still can be kept perfectly uses for mancarried device, and control is according to the charging of the precedence of main battery and back splint battery, and avoids using the DC power supply of twice power specification, so the different detecting result of microcontroller 190 necessary foundations, control the charging and discharging state of main battery and back splint battery, be described as follows.
Please refer to shown in Figure 2ly, it is the control flow chart of microcontroller detecting DC power supply plug, and this flow process can be when DC power supply plug, uses the mode of interrupting and starts execution, also can be that the timing of application microcontroller is interrupted carrying out.
Among the figure, when the S205 step, do you judge that at first DC power supply exists? exist when microcontroller detects DC power supply, that is DC power supply has been when having inserted, then flow process enters the S210 step to judge whether main battery exists and off-capacity.As judge when main battery is existence and off-capacity that then enter the S215 step, conducting main battery charging control switch is also closed back splint battery charge control switch, that is to say, main battery is charged.Otherwise represent main battery not exist, or main battery has been full of electricity, therefore, flow process enters the S220 step, closes main battery charging control switch and conducting back splint battery charge control switch, so that the back splint battery is charged.
And detect DC power supply and do not exist when the S205 step, that is DC power supply has been when having pulled out, then flow process enters the S230 step to judge the back splint battery and whether exist and capacity is enough to power.As judge that the back splint battery for existing and capacity when being enough to power, then enters the S240 step, conducting back splint battery discharge control switch also cuts out the main battery discharge control switch, that is to say, supplies mancarried device required electric power by the back splint battery.Otherwise represent the back splint battery not exist, or the back splint battery electric power exhausts, therefore, flow process enters the S235 step, closes back splint battery discharge control switch and conducting main battery discharge control switch, and supplies mancarried device required electric power by main battery.
Please refer to shown in Figure 3ly, it is the control flow chart of microcontroller detecting back splint battery plug, and this flow process is preferably when the back splint battery plug, and the mode of using interruption starts execution.
Among the figure, when the S305 step, do you judge that at first the back splint battery exists? when detecting the back splint battery, microcontroller exists, that is the back splint battery is when inserting, does does then flow process enter the S310 step and exist to judge main battery? as judge that main battery does not exist, then enter the S315 step, conducting back splint battery charge control switch and back splint battery discharge control switch are supplied electric power so that the back splint battery charge is reached by the back splint battery.And judge that main battery is when existing when the S310 step, then enter the S320 step, to judge whether off-capacity of main battery? when judging the main battery off-capacity, then enter the S330 step, conducting main battery charging control switch is also closed back splint battery charge control switch, so that main battery is charged.Otherwise represent main battery to be full of electricity, therefore, flow process enters the S325 step, closes main battery charging control switch and conducting back splint battery charge control switch, so that the back splint battery is charged.
Afterwards, flow process enters the S335 step, to judge whether the back splint battery capacity is enough to power supply, when microcontroller judges that the back splint battery capacity is enough to power, then flow process enters the S345 step, conducting back splint battery discharge control switch also cuts out the main battery discharge control switch, supplies mancarried device required electric power by the back splint battery.Otherwise the back splint battery electric power deficiency that representative is inserted, therefore, flow process enters the S340 step, closes back splint battery discharge control switch and conducting main battery discharge control switch, and supplies mancarried device required electric power by main battery.
In addition, do not exist when detecting the back splint battery in the S305 step, that is the back splint battery is when pulling out, then conducting main battery charging control switch and main battery discharge control switch are with to the main battery charging and supply electric power by main battery.
Please refer to shown in Figure 4ly, it is the control flow chart of microcontroller detecting main battery plug, and this flow process is preferably when main battery plug, and the mode of using interruption starts execution.
Among the figure, when the S405 step, do you judge that at first main battery exists? when detecting main battery, microcontroller exists, that is main battery is when inserting, does does then flow process enter the S410 step and exist to judge the back splint battery? as judge that the back splint battery does not exist, then enter the S415 step, conducting main battery charging control switch and main battery discharge control switch are to charge to main battery and to supply electric power by main battery.And judge that the back splint battery is when existing when the S410 step, then enter the S420 step, to judge that the back splint battery capacity is enough to power supply? as judge when the back splint battery capacity is enough to power, then enter the S430 step, conducting back splint battery discharge control switch also cuts out the main battery discharge control switch, supplies mancarried device required electric power by the back splint battery.Otherwise represent back splint battery electric power deficiency, therefore, flow process enters the S425 step, closes back splint battery discharge control switch and conducting main battery discharge control switch, and supplies mancarried device required electric power by main battery.
Afterwards, whether flow process enters the S435 step, not enough to judge the main battery capacity? when microcontroller is judged the main battery off-capacity, then enter the S445 step, conducting main battery charging control switch is also closed back splint battery charge control switch, so that main battery is charged.Otherwise represent main battery to be full of electricity, therefore, flow process enters the S440 step, closes main battery charging control switch and conducting back splint battery charge control switch, so that the back splint battery is charged.
In addition, do not exist when detecting main battery in the S405 step, that is main battery then enters the S450 step when pulling out, conducting back splint battery charge control switch and back splint battery discharge control switch are with to the back splint battery charge and supply electric power by the back splint battery.
By above explanation as can be known, when mancarried device when device has main battery and back splint battery simultaneously, its operating principle is the precedence discharge according to back splint battery and main battery, and charges according to the precedence of main battery and back splint battery.Therefore, when user's desire removes the back splint battery and during weight reduction, the main battery electric power that just can be kept perfectly uses for mancarried device, and can avoid using the DC power supply of twice power specification.In addition when mancarried device when only device has main battery or back splint battery, its operating principle then is same as the mancarried device of single battery, that is is discharged and recharged by the battery that has installed.
In addition, for fear of because of excessively discharging and recharging or the too high battery that damages of battery temperature, but this can plug the temperature of double-battery charge charge/discharge control circuit 100 reference battery temperature detecting unit 140 main batterys of detecting and back splint battery, with when temperature is too high, select to close main battery charging control switch 150 and back splint battery charge control switch 170 via microcontroller.But and the battery capacity detected of reference battery capacity detecting unit 130, determine whether open discharging and recharging, with further protection battery, avoid excessively discharging and recharging.
Claims (8)
1. one kind can plug the double-battery charge charge/discharge control circuit, is applicable to the mancarried device with a pluggable main battery and a back splint battery, and it is characterized in that: it comprises:
One battery insert-pull detection unit is in order to detect the plug state of this main battery and this back splint battery;
One direct current power supply detecting unit is in order to the plug state of a direct current power supply unit of detecting this mancarried device;
One battery capacity detecting unit is in order to detect the capacity of this main battery and this back splint battery;
One main battery charging control switch is in order to control the charge circuit of this main battery;
One main battery discharge control switch is in order to control the discharge loop of this main battery;
One back splint battery charge control switch is in order to control the charge circuit of this back splint battery;
One back splint battery discharge control switch is in order to control the discharge loop of this back splint battery; And
One microcontroller, couple this battery insert-pull detection unit, this direct current power supply detecting unit, this battery capacity detecting unit, this main battery charging control switch, this main battery discharge control switch, this back splint battery charge control switch and this back splint battery discharge control switch, in order to according to this main battery, the plug state of this back splint battery and this DC power supply, and the capacity of this main battery and this back splint battery, control this main battery charging control switch, this main battery discharge control switch, the conducting state of this back splint battery charge control switch and this back splint battery discharge control switch.
2. the double-battery charge charge/discharge control circuit that plugs as claimed in claim 1, it is characterized in that: when detecting this DC power supply when having inserted, judge that as this microcontroller this main battery exists and off-capacity, this main battery charging control switch of conducting and close this back splint battery charge control switch then, otherwise close this main battery charging control switch and this back splint battery charge control switch of conducting.
3. the double-battery charge charge/discharge control circuit that plugs as claimed in claim 1, it is characterized in that: when detecting this DC power supply when having pulled out, judge that as this microcontroller this back splint battery exists and capacity is enough to power supply, this back splint battery discharge control switch of conducting and close this main battery discharge control switch then, otherwise close this back splint battery discharge control switch and this main battery discharge control switch of conducting.
4. the double-battery charge charge/discharge control circuit that plugs as claimed in claim 1, it is characterized in that: when detecting this back splint battery insertion, in judging that as this microcontroller this main battery is pulled out, then this back splint battery charge control switch of conducting and this back splint battery discharge control switch, and when this microcontroller is judged this main battery existence and off-capacity, this main battery charging control switch of conducting and close this back splint battery charge control switch then, otherwise close this back splint battery charge control switch of this main battery charging control switch and conducting, in addition when this microcontroller judges that this back splint battery capacity is enough to power, this back splint battery discharge control switch of conducting and close this main battery discharge control switch then, otherwise close this back splint battery discharge control switch and this main battery discharge control switch of conducting.
5. the double-battery charge charge/discharge control circuit that plugs as claimed in claim 1 is characterized in that: when detecting this back splint battery when pulling out, and then this main battery charging control switch of conducting and this main battery discharge control switch.
6. the double-battery charge charge/discharge control circuit that plugs as claimed in claim 1, it is characterized in that: when detecting this main battery insertion, in judging that as this microcontroller this back splint battery is pulled out, then this main battery charging control switch of conducting and this main battery discharge control switch, and when this microcontroller judges that this back splint battery existence and capacity are enough to power, this back splint battery discharge control switch of conducting and close this main battery discharge control switch then, otherwise close this main battery discharge control switch of this back splint battery discharge control switch and conducting, in addition when this microcontroller is judged this main battery off-capacity, this main battery charging control switch of conducting and close this back splint battery charge control switch then, otherwise close this main battery charging control switch and this back splint battery charge control switch of conducting.
7. the double-battery charge charge/discharge control circuit that plugs as claimed in claim 1 is characterized in that: when detecting this main battery when pulling out, then the control of this back splint battery charge control switch of conducting and this back splint battery discharge is done and is closed.
8. the double-battery charge charge/discharge control circuit that plugs as claimed in claim 1, it is characterized in that: this charge-discharge control circuit more comprises a battery temperature sensing unit, in order to detect the temperature of this main battery and this back splint battery, with when temperature is too high, can select to close this main battery charging control switch and this back splint battery charge control switch via this microcontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410051788 CN1761119A (en) | 2004-10-11 | 2004-10-11 | Control circuit for charging or discharging plug able dual batteries in portable type devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410051788 CN1761119A (en) | 2004-10-11 | 2004-10-11 | Control circuit for charging or discharging plug able dual batteries in portable type devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1761119A true CN1761119A (en) | 2006-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410051788 Pending CN1761119A (en) | 2004-10-11 | 2004-10-11 | Control circuit for charging or discharging plug able dual batteries in portable type devices |
Country Status (1)
| Country | Link |
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| CN (1) | CN1761119A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101610304A (en) * | 2008-06-20 | 2009-12-23 | 希姆通信息技术（上海）有限公司 | The changing method of mobile communication terminal and double-battery charge and power supply thereof |
| WO2010060338A1 (en) * | 2008-11-03 | 2010-06-03 | 华为技术有限公司 | Hybrid battery management system, battery management method and hybrid standby power system |
| CN104915310A (en) * | 2014-03-10 | 2015-09-16 | 仁宝电脑工业股份有限公司 | Electronic system |
| CN105305597A (en) * | 2014-07-01 | 2016-02-03 | 同济汽车设计研究院有限公司 | Power supply system and method thereof |
| CN105490341A (en) * | 2015-12-28 | 2016-04-13 | 深圳市基伍智联科技有限公司 | Smart phone with dual-battery function |
| CN105958628A (en) * | 2016-05-16 | 2016-09-21 | 浪潮电子信息产业股份有限公司 | Power supply system and method |
| CN107170924A (en) * | 2017-04-24 | 2017-09-15 | 北京长城华冠汽车科技股份有限公司 | A kind of battery case and electric automobile |
| CN115085332A (en) * | 2022-07-20 | 2022-09-20 | 湖南威铭能源科技有限公司 | Water meter power supply system and management method thereof |
| CN115313572A (en) * | 2022-08-22 | 2022-11-08 | 歌尔科技有限公司 | Wearable device, charging and discharging control method and storage medium |
-
2004
- 2004-10-11 CN CN 200410051788 patent/CN1761119A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101610304A (en) * | 2008-06-20 | 2009-12-23 | 希姆通信息技术（上海）有限公司 | The changing method of mobile communication terminal and double-battery charge and power supply thereof |
| CN101610304B (en) * | 2008-06-20 | 2013-01-02 | 希姆通信息技术（上海）有限公司 | Mobile communication terminal and double-battery charge and power supply switching method thereof |
| WO2010060338A1 (en) * | 2008-11-03 | 2010-06-03 | 华为技术有限公司 | Hybrid battery management system, battery management method and hybrid standby power system |
| CN104915310A (en) * | 2014-03-10 | 2015-09-16 | 仁宝电脑工业股份有限公司 | Electronic system |
| CN105305597A (en) * | 2014-07-01 | 2016-02-03 | 同济汽车设计研究院有限公司 | Power supply system and method thereof |
| CN105490341A (en) * | 2015-12-28 | 2016-04-13 | 深圳市基伍智联科技有限公司 | Smart phone with dual-battery function |
| CN105958628A (en) * | 2016-05-16 | 2016-09-21 | 浪潮电子信息产业股份有限公司 | Power supply system and method |
| CN107170924A (en) * | 2017-04-24 | 2017-09-15 | 北京长城华冠汽车科技股份有限公司 | A kind of battery case and electric automobile |
| CN107170924B (en) * | 2017-04-24 | 2020-05-01 | 北京长城华冠汽车科技股份有限公司 | A battery box and electric vehicle |
| CN115085332A (en) * | 2022-07-20 | 2022-09-20 | 湖南威铭能源科技有限公司 | Water meter power supply system and management method thereof |
| CN115313572A (en) * | 2022-08-22 | 2022-11-08 | 歌尔科技有限公司 | Wearable device, charging and discharging control method and storage medium |
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