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CN102255346A - Portable electronic device - Google Patents

Portable electronic device Download PDF

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Publication number
CN102255346A
CN102255346A CN2010101894164A CN201010189416A CN102255346A CN 102255346 A CN102255346 A CN 102255346A CN 2010101894164 A CN2010101894164 A CN 2010101894164A CN 201010189416 A CN201010189416 A CN 201010189416A CN 102255346 A CN102255346 A CN 102255346A
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Prior art keywords
battery
power
portable electronic
electronic device
port
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CN2010101894164A
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Chinese (zh)
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CN102255346B (en
Inventor
李启胜
赖玉鹏
麦特·泰勒
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HTC Corp
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HTC Corp
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Priority to CN201010189416.4A priority Critical patent/CN102255346B/en
Publication of CN102255346A publication Critical patent/CN102255346A/en
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Abstract

Disclosed herein is a portable electronic device, including: a first battery, an inter-charging port and an inter-charging module. The mutual charging port is used for being connected with another portable electronic device, receiving the power of a second battery of the other portable electronic device or outputting the power of the first battery to the second battery. The mutual charging module is coupled between the first battery and the mutual charging port and used for comparing the electric power of the first battery and the electric power of the second battery. When the second battery is larger than the electric power of the first battery, the mutual charging module transmits the electric power of the second battery to the first battery so as to charge the first battery. When the second battery is smaller than the power of the first battery, the mutual charging module outputs the power of the first battery to the second battery through the mutual charging port so as to charge the second battery.

Description

Portable electron device
Technical field
The present invention is relevant for a kind of portable electron device, the charging technique of battery in relevant especially this kind portable electron device.
Background technology
Portable electron device provides electric power with battery usually.Usually need charge with charger when battery electric power is used up, perhaps, also can connect host computer charging by the USB on this portable electron device (USB) port.
Yet the user may be on hand without any finding just under the situation of charging mean that this portable electron device needs charging.For example, catching sight of mobile phone when being in harmony public affairs does not outside have electricity, but needs wherein address list information.Therefore, how to make " charging " action have more mobility, the problem of always specially grinding for the present technique field.
Summary of the invention
The present invention discloses a kind of portable electron device, comprising: one first battery, fills a port and a mutual mold filling piece mutually.This fills port mutually in order to being connected with another portable electron device, with the electric power of one second battery that receives this another portable electron device, maybe the electric power of this first battery is exported to this second battery of this another portable electron device.This mutual mold filling piece is coupled to this first battery and this fills between the port mutually, in order to the relatively electric power of this first battery and the electric power of this second battery.When the electric power of this second battery during greater than the electric power of this first battery, the electric power that this mutual mold filling piece transmits this second battery is given this first battery, so that this first battery is charged.When the electric power of this second battery during less than the electric power of this first battery, this mutual mold filling piece fills port mutually via this and exports the electric power of this first battery second battery of this another portable electron device to, so that this second battery is charged.
The above-mentioned port technique that fills mutually can adopt USB (universal serial bus) port common on the mobile phone, also can make independently metallic contact (not being contained in the metallic contact in any known port technology) in addition and realize.
Below enumerate a plurality of execution modes and relevant indicators to help to understand the present invention.
Description of drawings
A kind of application of Fig. 1 diagram portable electron device of the present invention;
A kind of structure of the further diagram portable electron device of Fig. 2;
A kind of USB cable that is applied to Fig. 2 of Fig. 3 diagram; And
The another kind of structure of the further diagram portable electron device of Fig. 4.
The reference numeral explanation
102,104～portable electron device;
106,112～battery;
108,114～mutually mold filling pieces;
110,116～mutually fill port;
202,214～charge switch;
204,406,428～current-limiting circuit;
206,212,408,426～mutually fill controller;
208,216～power switch;
210,412,430～protective circuit;
404～wireless communication interface;
410,420～confession charging contact mat;
414,424～magnet;
416,422～magnetic inductor;
CSA, CSA[0], CSA[1], CSB, CSB[0], CSB[1]～control signal;
MA, MB～connection prompting.
Embodiment
Following content comprises numerous embodiments of the present invention, and its content is not to be used for limiting the scope of the invention.The scope of reality of the present invention still should be with the master that is stated as of claim.
A kind of application of Fig. 1 diagram portable electron device of the present invention wherein connects two portable electron devices 102 and 104, makes the stronger device of electric power be able to the device charging more weak to electric power.Portable electron device 102 comprises: a battery 106, one mutual mold filling piece 108 and fills port one 10 mutually; Mold filling piece 108 is coupled to battery 106 and fills mutually between the port one 10 mutually.Portable electron device 104 comprises: a battery 112, one mutual mold filling piece 114 and fills port one 16 mutually; Mold filling piece 114 is coupled to battery 112 and fills mutually between the port one 16 mutually.As shown in the figure, filling port one 10 and 116 mutually can link together portable electron device 102 and 104.Above-mentioned mutual mold filling piece and the design of filling port mutually make the battery 106 of portable electron device 102 and 104 and 112 electric power be passed to the other side's use.For example, the electric power of the battery 112 of portable electron device 104 can be by filling port one 10 input portable electron devices 102 mutually, again via wherein mutually mold filling piece 108 pass to battery 106, so that battery 106 is charged.
A kind of structure of the further diagram portable electron device of Fig. 2.As shown in the figure, filling port (110,116) mutually realizes with USB (USB) port.Two square tubes are used as the transmission pipeline of battery (106,112) electric power with the power pins VBUS of serial bus port (110,116).
For convenience of description, below explanation mainly so that wherein one to make things convenient for portable electronic apparatus-102-be example, 104 of the opposing party's portable electron devices can be realized by similar structures.Consult Fig. 2, the mutual mold filling piece 108 of portable electron device 102 comprises at least: a charge switch 202, a current-limiting circuit 204, are filled controller 206, a power switch 208 and a protective circuit 210 mutually.The electric power of the battery 112 of portable electron device 104 can be received by the power pins VBUS of USB 110.Charge switch 202 and current-limiting circuit 204 are used to couple the power pins VBUS of this USB (universal serial bus) port 110 to battery 106.Whether the conducting of charge switch 202 is by filling controller 206 decisions mutually.As shown in the figure, fill controller 206 mutually and be coupled between battery 106 and the USB (universal serial bus) port 110 power pins VBUS, in order to electric power and the received battery 112 electric power comparison of USB (universal serial bus) port 110 power pins VBUS battery 106.If the electric power of battery 112 is greater than battery 106, then fill controller 206 mutually with control signal CSA[0] conducting charge switch 202, and with control signal CSA[1] not conducting power switch 208, make received battery 112 electric power of USB (universal serial bus) port 110 power pins VBUS be able to battery 106 be charged via the charge switch 202 and the path of current-limiting circuit 204.In other embodiment, charge switch 202 can be positioned at current-limiting circuit 204, uses conducting or not conducting charge path.
In addition, mold filling piece 108 also is further used for transmitting the power pins VBUS of the electric power of battery 106 to USB (universal serial bus) port 110 mutually, so that battery 106 electric power are exported to portable electron device 104.Consult Fig. 2, about this execution mode, mold filling piece 108 comprises power switch 208 and protective circuit 210 mutually, in order to couple battery 106 to USB (universal serial bus) port 110 power pins VBUS.Protective circuit 210 can be realized by diode, pours into battery 106 in order to avoid improper electric current via the current path that power switch 208 is provided.In this execution mode, fill controller 206 mutually and also design and control power switch 208.For example; fill controller 206 mutually after comparing received battery 112 electric power of battery 106 electric power and USB (universal serial bus) port 110 power pins VBUS; be lower than the electric power of battery 106 if find the electric power of battery 112; then can be with control signal CSA[1] conducting power switch 208; and with control signal CSA[0] not conducting charge switch 202, make the electric power of battery 106 be able to power pins VBUS that path via protective circuit 210 and power switch 208 is passed to USB (universal serial bus) port 110 for the portable electron device 104 wherein battery 112 that charges.In other embodiment, power switch 208 can be positioned at protective circuit 210, uses conducting or not conducting supply path.
About the cable that is connected between the USB 110 and 116, the present invention further proposes a kind of USB cable (as shown in Figure 3).But these USB cable two ends all are designed to male.Thus, Fig. 2 USB 110 and 116 can be all the female design.In addition, Fig. 3 USB cable has special design in addition, wherein ID pin (ID) and grounding pin (GND) short circuit and its D+ pin (D+) and D-pin (D-) short circuit.
Get back to Fig. 2, cable design based on Fig. 3, fill ID pin (ID), D+ pin (D+), D-pin (D-) and grounding pin (GND) that controller 206 can be designed to further couple USB (universal serial bus) port 110 mutually, to judge whether the cable that USB (universal serial bus) port 110 is connected is particular design cable (ID pin and the short circuit of GND pin and D+ and the short circuit of D-pin) shown in Figure 3.If USB (universal serial bus) port 110 is to connect USB cable shown in Figure 3, filling controller 206 mutually can control signal CSA[1] make power switch 208 conductings, make the electric power of battery 106 be passed to USB (universal serial bus) port 110 power pins VBUS.Filling controller 212 mutually thereby can learn the current potential of battery 106 in the portable electron device 104, and with battery 106 current potentials and battery 112 current potentials relatively, with output control signal CSB[0] and CSB[1] charge switch 214 and power switch 216 are controlled.Based on similar operation, portable electron device 104 fill mutually controller 212 can determine that USB (universal serial bus) port 116 connects for Fig. 3 cable the time conducting power switch 216, what make that the electric power of battery 112 is able to that mat USB (universal serial bus) port 116 power pins VBUS pass to portable electron device 102 fills controller 206 mutually, make and fill controller 206 mutually and be able to the electric power of battery 106 and 112 is compared, so that control signal CSA[0 to be provided] and CSA[1] operation charge switch 202 and power switch 208.
Make a general survey of the operation of all elements shown in Figure 2, put in order as follows., fill controller 206 and 212 mutually and can detect this respectively and be connected, and make power switch 208 and 216 temporary transient conductings respectively when 116 are connected with cable shown in Figure 3 in USB (universal serial bus) port 110. Portable electron device 102 and 104 thereby battery (106 and 112) power information own can be passed to the other side and carry out the current potential comparisons.Fill mutually controller 206 and 212 finish current potential relatively after, can control the conducting/not on-state of charge switch 202, power switch 208, charge switch 214 and power switch 216, to set charging/supply path.If battery 106 electric power are less than battery 112 electric power, then charge switch 202 conductings, power switch 208 not conductings, and charge switch 214 not conductings, power switch 216 conductings make battery 112 electric power be able to rechargeable battery 106.If situation is opposite, battery 106 electric power are greater than battery 112 electric power, and then charge switch 202 not conductings, power switch 208 conductings, and charge switch 214 conductings, power switch 216 not conductings make battery 106 electric power be able to battery 112 is charged.
The another kind of structure of the further diagram portable electron device of Fig. 4.As shown in the figure, fill port (110,116) mutually and change realization in another way.For convenience of description, below explanation mainly so that wherein one to make things convenient for portable electronic apparatus-102-be example, 104 of the opposing party's portable electron devices can be realized by similar structures.
With reference to figure 4, fill port one 10 mutually and comprise one at least for charging contact mat 410.Battery 112 electric power of portable electron device 104 will be by importing portable electron devices 102 for charging contact mat 410.Can be the Metal Contact sheet of independent design for charging contact mat 410, be built in any known connectivity port (for example USB (universal serial bus) port of Fig. 2) in not at portable electron device 102 shells.
Cooperate the design for charging contact mat 410, portable electron device 102 can further fill port one 10 mutually and make particular design in the mold filling piece 108 mutually at it.As shown in the figure, fill port one 10 mutually and can also comprise a wireless communication interface 404, and mutually mold filling piece 108 can comprise also that a current-limiting circuit 406 and fills controller 408 mutually.Wireless communication interface 404 will receive battery 112 power informations that portable electron device 104 is transmitted with communication and come.406 of current-limiting circuits are used to couple for charging contact mat 410 to battery 106, and by the switch (not shown) of filling mutually in the controller 408 control current-limiting circuits 406, with the conducting state of control current-limiting circuit 406.Fill controller 408 mutually and be coupled between battery 106 and the wireless communication interface 404, in order to compare battery 112 power informations that battery 106 electric power and wireless communication interface 404 are received.If the electric power of battery 112 then fills controller 408 with control signal CSA conducting current-limiting circuit 406 mutually greater than the electric power of battery 106, make for charging contact mat 410 received battery 112 electric power to be able to battery 106 is charged.
In addition, Fig. 4 execution mode further designs battery 112 uses that a supply path is exported to battery 106 electric power of portable electron device 102 portable electron device 104.As shown in the figure, mold filling piece 108 can comprise that further a protective circuit 412 is used to couple battery 106 to for charging contact mat 410, charges to battery 112 to portable electron device 104 with output battery 106 electric power mutually.
In addition, wireless communication interface 404 further can communication sends out portable electron device 102 with the power information of battery 106, receives for portable electron device 104 and uses.
In addition, about portable electron device 102 and 104 be connected, the execution mode of Fig. 4 is design one magnetic force induction mode further.As shown in the figure, the port one 10 that fills mutually of portable electron device 102 also comprises a magnet 414 and a magnetic inductor 416.When connect for charging contact mat 410 portable electron devices 104 for charging contact mat 420 time, the magnet 414 on the portable electron device 102 and magnetic inductor 416 are understood magnetic inductor 422 and the magnet 424 on each autoregistration portable electron device 104. Magnetic inductor 416 and 422 can be exported respectively and be connected prompting MA and MB.With portable electron device 102 is example, connects prompting MA and will drive and fill controller 408 mutually and start and fill operation mutually: relatively battery 106 and 112 electric power, and with generation control signal CSA conducting or not conducting current-limiting circuit 406 and protective circuit 412.Connecting prompting MB can drive too and fill controller 426 mutually and start it and fill operation mutually.In this embodiment, control signal CSA can be by the switch in control current-limiting circuit 406 and the protective circuit 412, with conducting or not conducting current-limiting circuit 406 and protective circuit 412.Perhaps, control signal CSA can be by the switch outside control current-limiting circuit 406 and the protective circuit 412 (as power switch 208 and the charge switch 202 of Fig. 2), with conducting or not conducting current-limiting circuit 406 and protective circuit 412.
The interaction arrangement of all elements of Fig. 4 execution mode is as follows.Portable electron device 102 is with after 104 are connected in mode shown in Figure 4, and magnetic inductor 416 and 422 can provide respectively and be connected prompting MA and MB to filling controller 408 and 426 mutually, to drive the electric power that fills controller 408 and 426 comparison batteries 106 and 112 mutually.If battery 106 electric power are higher than the electric power of battery 112; filling the control signal CSA that controller 408 produced mutually can make current-limiting circuit 406 not conductings and make protective circuit 412 conductings; and fill the control signal CSB that controller 426 produced mutually and can make current-limiting circuit 428 conductings and make protective circuit 430 not conductings, make the electric power of battery 106 be able to flow out to flow into again pass to battery 112 for charging contact mat 420 by current-limiting circuit 428 and charge for charging contact mat 410 via protective circuit 412.Otherwise; if battery 106 electric power are lower than the electric power of battery 112; filling the control signal CSA that controller 408 produced mutually can make current-limiting circuit 406 conductings and make protective circuit 412 not conductings; and fill the control signal CSB that controller 426 produced mutually and can make current-limiting circuit 428 not conductings and make protective circuit 430 conductings, make the electric power of battery 112 be able to flow out to flow into again pass to battery 106 for charging contact mat 410 by current-limiting circuit 406 and charge for charging contact mat 420 via protective circuit 430.
Aforementioned numerous embodiments is not to be used for limiting the scope of the invention with helping understand the present invention.The scope of the invention is asked for an interview claims.

Claims (13)

1.一种便携式电子装置，包括：1. A portable electronic device comprising: 一第一电池；a first battery; 一互充端口，用以与另一便携式电子装置连接，以接收该另一便携式电子装置的一第二电池的电力，或将该第一电池的电力输出至该另一便携式电子装置的该第二电池；A recharging port for connecting with another portable electronic device to receive power from a second battery of the other portable electronic device, or output power from the first battery to the second battery of the other portable electronic device Second battery; 一互充模块，耦接于该第一电池与该互充端口之间，用以比较该第一电池的电力与该第二电池的电力；a recharging module, coupled between the first battery and the recharging port, for comparing the power of the first battery with the power of the second battery; 其中当该第二电池的电力大于该第一电池的电力时，该互充模块传输该第二电池的电力给该第一电池，以对该第一电池进行充电；以及Wherein when the power of the second battery is greater than the power of the first battery, the mutual charging module transmits the power of the second battery to the first battery to charge the first battery; and 当该第二电池的电力小于该第一电池的电力时，该互充模块经由该互充端口将该第一电池的电力输出至该另一便携式电子装置的第二电池，以对该第二电池进行充电。When the power of the second battery is less than the power of the first battery, the mutual charging module outputs the power of the first battery to the second battery of the other portable electronic device via the mutual charging port to The battery is charged. 2.如权利要求1所述的便携式电子装置，其中该互充端口为一通用串行总线端口，且该通用串行总线端口的一电源引脚用于接收该第二电池的电力。2. The portable electronic device as claimed in claim 1, wherein the charging port is a USB port, and a power pin of the USB port is used to receive power from the second battery. 3.如权利要求2所述的便携式电子装置，其中该互充模块包括：3. The portable electronic device as claimed in claim 2, wherein the refillable module comprises: 一充电开关以及一限流电路，用以耦接该电源引脚至该第一电池；以及a charging switch and a current limiting circuit for coupling the power supply pin to the first battery; and 一互充控制器，耦接于该第一电池与该电源引脚之间，用以判断该第一电池的电力与该第二电池的电力何者较大，且于该第二电池的电力大于该第一电池的电力时导通该充电开关，以使用该第二电池的电力对该第一电池进行充电。a mutual charging controller, coupled between the first battery and the power supply pin, used to determine which of the power of the first battery and the power of the second battery is greater, and when the power of the second battery is greater than The charging switch is turned on when the power of the first battery is used to charge the first battery with the power of the second battery. 4.如权利要求3所述的便携式电子装置，其中该互充模块还包括一供电开关以及一保护电路，用以耦接该第一电池至该电源引脚；且4. The portable electronic device as claimed in claim 3, wherein the rechargeable module further comprises a power switch and a protection circuit for coupling the first battery to the power pin; and 该互充控制器还于该第二电池的电力低于该第一电池的电力时导通该供电开关，使得该第一电池的电力得以传递至该电源引脚以对该第二电池进行充电。The mutual charging controller also turns on the power supply switch when the power of the second battery is lower than the power of the first battery, so that the power of the first battery can be delivered to the power pin to charge the second battery . 5.如权利要求4所述的便携式电子装置，其中该通用串行总线端口藉由一通用串行总线缆线与该另一便携式电子装置连接，该通用串行总线缆线的一ID引脚与一接地引脚短路、且其一D+引脚与一D-引脚短路。5. The portable electronic device as claimed in claim 4, wherein the USB port is connected to the other portable electronic device via a USB cable, an ID of the USB cable pin is shorted to a ground pin, and a D+ pin is shorted to a D− pin. 6.如权利要求5所述的便携式电子装置，其中该互充控制器进一步耦接该通用串行总线端口的一第一ID引脚、一第一D+引脚、一第一D-引脚以及一第一接地引脚，以判断该通用串行总线端口是否藉该通用串行总线缆线连接该另一便携式电子装置。6. The portable electronic device as claimed in claim 5, wherein the mutual charging controller is further coupled to a first ID pin, a first D+ pin, and a first D- pin of the USB port and a first ground pin for judging whether the USB port is connected to the other portable electronic device via the USB cable. 7.如权利要求6所述的便携式电子装置，其中该互充控制器还于检测到该通用串行总线端口藉该通用串行总线缆线连接该另一便携式电子装置时导通该供电开关，使得该第一电池的电力经由该电源引脚传递至该另一便携式电子装置。7. The portable electronic device as claimed in claim 6, wherein the mutual charging controller also turns on the power supply when detecting that the USB port is connected to the other portable electronic device via the USB cable switch, so that the power of the first battery is delivered to the other portable electronic device through the power pin. 8.如权利要求1所述的便携式电子装置，其中该互充端口包括一第一供充电接触垫，用以接收该第二电池的电力。8. The portable electronic device as claimed in claim 1, wherein the charging port comprises a first contact pad for receiving power from the second battery. 9.如权利要求8所述的便携式电子装置，其中该互充端口还包括：9. The portable electronic device as claimed in claim 8, wherein the refill port further comprises: 一无线通信接口，以无线通信方式接收该第二电池的电力信息。A wireless communication interface receives the power information of the second battery by wireless communication. 10.如权利要求9所述的便携式电子装置，其中该互充模块包括：10. The portable electronic device as claimed in claim 9, wherein the refillable module comprises: 一限流电路，用以耦接该第一供充电接触垫至该第一电池；以及a current limiting circuit for coupling the first charging contact pad to the first battery; and 一互充控制器，耦接于该第一电池与该无线通信接口之间，用以判断该第一电池的电力与该第二电池的电力何者较高，且于该第二电池的电力高于该第一电池的电力时导通该限流电路，使该第二电池的电力得以对该第一电池进行充电。A mutual charging controller, coupled between the first battery and the wireless communication interface, is used to determine which of the power of the first battery and the power of the second battery is higher, and when the power of the second battery is higher, When the power of the first battery is turned on, the current limiting circuit is turned on, so that the power of the second battery can charge the first battery. 11.如权利要求10所述的便携式电子装置，其中该互充模块还包括一保护电路，用于耦接该第一电池至该第一供电接触垫以输出该第一电池的电力至该另一便携式电子装置。11. The portable electronic device as claimed in claim 10, wherein the mutual charging module further comprises a protection circuit for coupling the first battery to the first power supply contact pad to output the power of the first battery to the other A portable electronic device. 12.如权利要求11所述的便携式电子装置，其中该无线通信接口还以无线通信方式将该第一电池的电力信息发送至该另一便携式电子装置。12. The portable electronic device as claimed in claim 11, wherein the wireless communication interface also transmits the power information of the first battery to the other portable electronic device in a wireless communication manner. 13.如权利要求12所述的便携式电子装置，其中该互充端口还包括一第一磁铁以及一第一磁感应器，用以于该第一供充电接触垫连接该另一便携式电子装置的一第二供充电接触垫时，各自对准该另一便携式电子装置上的一第二磁感应器以及一第二磁铁，使该第一磁感应器输出一第一连接提示给该互充控制器以驱动该互充控制器比较该第一电池与第二电池的电力。13. The portable electronic device as claimed in claim 12, wherein the mutual charging port further comprises a first magnet and a first magnetic sensor for connecting the first charging contact pad to one of the other portable electronic devices. When the second charging contact pad is used, it is respectively aligned with a second magnetic sensor and a second magnet on the other portable electronic device, so that the first magnetic sensor outputs a first connection prompt to the mutual charge controller to drive The mutual charging controller compares the electric power of the first battery and the second battery.
CN201010189416.4A 2010-05-20 2010-05-20 portable electronic device Active CN102255346B (en)

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CN103683350A (en) * 2012-09-13 2014-03-26 华平信息技术股份有限公司 Charging method and charging circuit of electronic equipment, and electronic equipment
CN103682491A (en) * 2012-09-13 2014-03-26 华平信息技术股份有限公司 Charging method between electronic devices, charging circuits and electronic devices
CN103941135A (en) * 2013-08-07 2014-07-23 武汉天马微电子有限公司 Short circuit detection method and device
CN104009352A (en) * 2013-02-21 2014-08-27 英华达（上海）科技有限公司 Charging adapter and charging method of electronic device
CN105098888A (en) * 2015-07-20 2015-11-25 小米科技有限责任公司 Charging method and device
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CN103941135A (en) * 2013-08-07 2014-07-23 武汉天马微电子有限公司 Short circuit detection method and device
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CN107577620A (en) * 2016-07-04 2018-01-12 佳能株式会社 Information processor, information processing method and recording medium
WO2018045714A1 (en) * 2016-09-12 2018-03-15 珠海格力电器股份有限公司 Partner charging control method and system, and mobile device
CN108616148A (en) * 2016-12-09 2018-10-02 手持产品公司 Intelligent battery balance system and method
CN106602663A (en) * 2017-01-05 2017-04-26 捷开通讯(深圳)有限公司 Combined intelligent device charging and mutual charging device and charging method
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CN108536267A (en) * 2018-03-30 2018-09-14 联想(北京)有限公司 Information processing method and electronic equipment
CN111224438A (en) * 2018-11-26 2020-06-02 和硕联合科技股份有限公司 Electronic device with universal sequence bus C-type connector
CN112166539A (en) * 2019-09-26 2021-01-01 深圳市大疆创新科技有限公司 Battery management device, method and system
WO2021056316A1 (en) * 2019-09-26 2021-04-01 深圳市大疆创新科技有限公司 Battery management apparatus and method, and system
CN111030215A (en) * 2019-12-03 2020-04-17 安徽爱学堂教育科技有限公司 Power supply intercommunication circuit and device for equipment room

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