CN102111006B - Charging connector contact resistance detection device and charging control method - Google Patents

Charging connector contact resistance detection device and charging control method Download PDF

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Publication number
CN102111006B
CN102111006B CN 201110072431 CN201110072431A CN102111006B CN 102111006 B CN102111006 B CN 102111006B CN 201110072431 CN201110072431 CN 201110072431 CN 201110072431 A CN201110072431 A CN 201110072431A CN 102111006 B CN102111006 B CN 102111006B
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CN
China
Prior art keywords
charging
voltage
magnitude
battery
pegging graft
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CN 201110072431
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Chinese (zh)
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CN102111006A (en
Inventor
周明亮
肖铿
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深圳可立克科技股份有限公司
绵阳可立克电子科技有限公司
信丰可立克科技有限公司
惠州市可立克科技有限公司
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Application filed by 深圳可立克科技股份有限公司, 绵阳可立克电子科技有限公司, 信丰可立克科技有限公司, 惠州市可立克科技有限公司 filed Critical 深圳可立克科技股份有限公司
Priority to CN 201110072431 priority Critical patent/CN102111006B/en
Publication of CN102111006A publication Critical patent/CN102111006A/en
Application granted granted Critical
Publication of CN102111006B publication Critical patent/CN102111006B/en

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Abstract

The invention discloses a charging connector contact resistance detection device. The device comprises a detection unit and a control unit arranged at a power supply end, wherein the detection unit is used for detecting a voltage value of a plug part between the power supply end and a battery; and the control unit is used for stopping charging when the voltage value of the plug part is over a set maximum threshold, and controlling to charge by a normal current when the voltage value of the plug part is below a normal threshold. The charging control method comprises the following steps of: a, detecting whether the power supply end is connected with the battery electrically; if the power supply end is connected with the battery electrically, performing a step b; and b, performing pre-charging according to a set low current, and detecting the voltage value of the plug part between the power supply end and the battery; stopping charging when the detected voltage value of the plug part is over the set maximum threshold; and charging by using the normal current when the detected voltage value of the plug part is below the normal threshold. By detecting the plug part and controlling the charging according to a detection result, problems caused by poor contact of the plug part can be effectively avoided.

Description

Charging connector contact resistance detection device and charge control method
Technical field
The present invention relates to the power battery charging technology, particularly relate to a kind of charging connector contact resistance detection device and charge control method.
Background technology
Existing charging station when the charging output plug is connected to the female seat of power battery pack, is connected charge switch when power battery pack is charged, powerful charging current is just directly charged to battery pack.There is very large hidden danger in this charging modes, because the power battery pack charging is carried out outdoor mostly, environment is harsh, its charging plug and socket are subject to easily misoperation or outside contamination and cause loose contact, contact resistance increases, and when large charging current is passed through, will produce very large loss and cause serious heating on its contact resistance, finally cause charge efficiency low, may initiation fire when serious, burn the charging plug socket.Therefore whether its charging current output plug is good with contacting of electrokinetic cell group interface, and whether each contact puts in place, and these factors all can affect the quality of charging each time.
Summary of the invention
Main purpose of the present invention is exactly for the deficiencies in the prior art, and a kind of charging connector contact resistance detection device and charge control method are provided, and can effectively avoid dividing contact the bad problem of bringing because of the Plug Division.
For achieving the above object, the present invention is by the following technical solutions:
A kind of charging connector contact resistance detection device, comprise the detecting unit and the control unit that are arranged on feeder ear, described detecting unit is for detection of the magnitude of voltage of the part of the grafting between feeder ear and the battery, described control unit is used for the testing result control charging according to described detecting unit, setting the only charging of the above time control stop of max-thresholds when the magnitude of voltage of the part of pegging graft, controlling with the normal electrical flow valuve when normality threshold is following when the magnitude of voltage of the part of pegging graft and charge.
Preferably, described detecting unit comprises anodal test side and negative pole test side, described anodal test side is for detection of the branch road that is in the anode end of the described part of pegging graft, described negative pole test side is for detection of the branch road that is in the battery cathode end of the described part of pegging graft, and the magnitude of voltage of described grafting part is the higher person in the detected value of the detected value of described anodal test side and described negative pole test side.
Preferably, when the magnitude of voltage of the part of pegging graft was higher than normality threshold and is lower than the setting max-thresholds, described control unit controlled to be lower than the current charges of normal charging current value.
Preferably, also comprise Alarm Unit, be used for when the magnitude of voltage of the part of pegging graft is higher than normality threshold, sending the prompting of loose contact.
Preferably, the socket that comprises that plug joins is with it divided in described Plug Division.
A kind of charging pile for the power battery pack power supply comprises aforementioned any charging connector contact resistance detection device.
A kind of charge control method may further comprise the steps:
A. detect feeder ear and whether be electrically connected with battery, if be electrically connected, execution in step b;
B. carry out precharge according to the little electric current of setting and detect feeder ear and battery between the magnitude of voltage of grafting part, peg graft magnitude of voltage partly when the setting max-thresholds is above when detecting, stop charging, peg graft magnitude of voltage partly when normality threshold is following when detecting, charge with the normal electrical flow valuve.
Preferably, among the step b, detect simultaneously the branch road that is in the anode end of the described part of pegging graft and the branch road that is in the battery cathode end of described grafting part, with the magnitude of voltage of the higher person in the detected value of the detected value of described anodal test side and described negative pole test side as the described part of pegging graft.
Preferably, among the step b, when the magnitude of voltage that detects the part of pegging graft is lower than the setting max-thresholds but is higher than normality threshold, with the setting current value charging less than the normal charging current value.
Preferably, among the step b, when the magnitude of voltage that detects the part of pegging graft is higher than normality threshold, alarm prompt.
The technique effect that the present invention is useful is:
According to the present invention, only have when detecting contact resistance when (being reflected by the voltage on it), just to start normal large current charge in allowed band, when non-allowed band, stop charging, can also carry out the derate charging according to the contact situation, to reduce the charging risk.Owing to before charging normal, detect first the connection of charging grafting part (such as the plug of feeder ear and the socket of battery-end), thereby effectively avoid dividing contact problems affect charge efficiency because of the Plug Division, even cause the problem of more serious charging accident.
Description of drawings
The structure principle chart that Fig. 1 charges for the embodiment that uses apparatus of the present invention;
Fig. 2 is the charging control flow chart of an embodiment of the inventive method.
Embodiment
By reference to the accompanying drawings the present invention is further described in detail by the following examples.
The charging connector contact resistance detection device of an embodiment comprises detecting unit and the control unit (not shown) that is arranged on feeder ear, described detecting unit is for detection of the magnitude of voltage of the part of the grafting between feeder ear and the battery, described control unit is used for the testing result control charging according to described detecting unit, setting the only charging of the above time control stop of max-thresholds when the magnitude of voltage of the part of pegging graft, controlling when normality threshold (being the current value of setting under the battery normal charging condition) is following when the magnitude of voltage of the part of pegging graft and charge with the normal electrical flow valuve.In a preferred embodiment, charging connector contact resistance detection device also comprises Alarm Unit (not shown), and when the magnitude of voltage of the part of pegging graft was higher than normality threshold, Alarm Unit was accepted the prompting of sending loose contact of control unit.
See also Fig. 1, in one embodiment, preferably, described detecting unit comprises anodal test side and negative pole test side, described anodal test side is for detection of the branch road that is in the anode end of the described part of pegging graft, described negative pole test side is for detection of the branch road that is in the battery cathode end of the described part of pegging graft, and the magnitude of voltage of described grafting part is the higher person in the detected value of the detected value of described anodal test side and described negative pole test side.
In a preferred embodiment, it is larger than normality threshold to set max-thresholds, when detecting unit is higher than normality threshold and is lower than the setting max-thresholds when the magnitude of voltage of the part of pegging graft, described control unit controls to be lower than the current charges of normal charging current value, like this, just can also continue charging when detecting not too serious contact problems.Set minimum also can the setting for of max-thresholds and equal normality threshold, just will stop charging in case detect contact problems like this.
The charging pile of an embodiment comprises above-mentioned a kind of charging connector contact resistance detection device, and this charging pile can be used for powering to power battery pack.
The socket that comprises that plug joins is with it divided in typical Plug Division.Plug and socket can select respectively to be arranged on feeder ear or battery-end.
On the other hand, the invention provides a kind of charge control method, may further comprise the steps:
A. detect feeder ear and whether be electrically connected with battery, if be electrically connected, execution in step b;
B. carry out precharge according to the little electric current of setting and detect feeder ear and battery between the magnitude of voltage of grafting part, peg graft magnitude of voltage partly when the setting max-thresholds is above when detecting, stop charging, peg graft magnitude of voltage partly when normality threshold is following when detecting, charge with the normal electrical flow valuve.
In a preferred embodiment, among the step b, detect simultaneously the branch road that is in the anode end of the described part of pegging graft and the branch road that is in the battery cathode end of described grafting part, with the magnitude of voltage of the higher person in the detected value of the detected value of described anodal test side and described negative pole test side as the described part of pegging graft.
In a preferred embodiment, among the step b, when the magnitude of voltage that detects the part of pegging graft is lower than the setting max-thresholds but is higher than normality threshold, with the setting current value charging less than the normal charging current value.
In a preferred embodiment, among the step b, when the magnitude of voltage that detects the part of pegging graft is higher than normality threshold, alarm prompt.
The below further specifies charging connector contact resistance detection device and corresponding charge control method as an example of a preferred embodiment example.
Referring to Fig. 1, one group of complete charging device comprises a charging output plug and the socket that is installed on the power battery pack.Plug and socket comprises 4 one to one interconnective terminals at least, is respectively the anodal A1 of charging plug and the anodal A2 of battery pack socket; Charging plug negative pole B1 and battery pack socket negative pole B2.Preferably, detecting unit comprises: the charging plug detection terminal C1 of anode end and battery pack socket detection terminal C2, and battery pack socket detection terminal C2 is connected with battery anode A2; And the charging plug detection terminal D1 of battery cathode end and battery pack socket detection terminal D2, battery pack socket detection terminal D2 is connected with battery pack negative pole B2.
Referring to Fig. 2, the charge control method of an embodiment preferably includes following flow process:
When charging plug is connected to the power battery pack socket, at first the electrical connection situation is detected, if charging station (or claiming charging pile) detects the detection terminal C1 of holding wire and the voltage signal between the detection terminal D1, show that then charging plug is electrically connected with the battery pack socket, the contact resistance of charging station start detection charging plug and battery pack socket and correspondingly control charging, process is as follows:
The first step, charging station starts charging, load known quantitative (generally less) charging current, detecting unit detects the voltage between end points A0 and the end points C0, thereby know that grafting part between feeder ear and the battery is at the magnitude of voltage of anode end, also can reflect this part contact resistance size cases of the anodal A1 of charging plug and battery pack socket positive pole A2, detecting unit detects the voltage between end points B0 and the end points D0 simultaneously, thereby know grafting part between feeder ear and the battery at the magnitude of voltage of battery cathode end, also can reflect this part contact resistance size cases of the anodal B1 of charging plug and battery pack socket negative pole B2.
Second step, voltage V2 between terminal A 0 and the end points C0 is compared with normal set point, terminal B 0 is compared with normal set point with the voltage between the end points D0, if aforementioned both magnitude of voltage all is lower than normal set point, judge that then charging plug contacts well with the battery pack socket, can charge normal, charging station just can start the program of charging normal to batteries charging.
The 3rd step, press the judgement of second step, if aforementioned both any one value of magnitude of voltage is higher than the setting max-thresholds, judge that then there are serious contact problems in charging plug and battery pack socket, cannot charge, charging station just sends the serious bad indication of contact, and prompting reconnects after need processing plugs and sockets again, repeats aforementioned trace routine.
The 4th step, press the judgement of second step, if aforementioned both magnitude of voltage any one the value between normality threshold with the setting max-thresholds between, judge that then charging plug contacts some problems of existence with socket, normally quick charge, charging station sends the indication of loose contact, continues charging but can reduce charging current.
Above content is the further description of the present invention being done in conjunction with concrete preferred implementation, can not assert that implementation of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.

Claims (9)

1. charging connector contact resistance detection device, it is characterized in that, comprise the detecting unit and the control unit that are arranged on feeder ear, described detecting unit is for detection of the magnitude of voltage of the part of the grafting between feeder ear and the battery, described control unit is used for the testing result control charging according to described detecting unit, when the magnitude of voltage of the part of pegging graft is being set the only charging of the above time control stop of max-thresholds, control with the normal electrical flow valuve when normality threshold is following when the magnitude of voltage of the part of pegging graft and to charge, described detecting unit comprises anodal test side and negative pole test side, described anodal test side is for detection of the branch road that is in the anode end of the described part of pegging graft, described negative pole test side is for detection of the branch road that is in the battery cathode end of the described part of pegging graft, and the magnitude of voltage of described grafting part is the higher person in the detected value of the detected value of described anodal test side and described negative pole test side.
2. charging connector contact resistance detection device as claimed in claim 1 is characterized in that, when the magnitude of voltage of the part of pegging graft was higher than normality threshold and is lower than the setting max-thresholds, described control unit controlled to be lower than the current charges of normal charging current value.
3. charging connector contact resistance detection device as claimed in claim 1 or 2 is characterized in that, also comprises Alarm Unit, is used for sending when the magnitude of voltage of the part of pegging graft is higher than normality threshold the prompting of loose contact.
4. charging connector contact resistance detection device as claimed in claim 1 or 2 is characterized in that, described Plug Division is divided and comprised plug and the socket that joins with it.
5. charging connector contact resistance detection device as claimed in claim 1 or 2, it is characterized in that, described anodal test side comprises the charging plug detection terminal of anode end and the battery pack socket detection terminal of anode end, and the battery pack socket detection terminal of anode end is connected with battery anode; Described negative pole test side comprises the charging plug detection terminal of battery cathode end and the battery pack socket detection terminal of battery cathode end, and the battery pack socket detection terminal of battery cathode end is connected with the battery pack negative pole.
6. the charging pile for the power battery pack power supply is characterized in that, comprises such as each described charging connector contact resistance detection device of claim 1 to 5.
7. a charge control method is characterized in that, may further comprise the steps:
A. detect feeder ear and whether be electrically connected with battery, if be electrically connected, execution in step b;
B. carry out precharge according to the little electric current of setting and detect feeder ear and battery between the magnitude of voltage of grafting part, peg graft magnitude of voltage partly when the setting max-thresholds is above when detecting, stop charging, peg graft magnitude of voltage partly when normality threshold is following when detecting, charge with the normal electrical flow valuve;
Among the described step b, the branch road that is in the anode end of the described part of pegging graft is detected in anodal test side, simultaneously the branch road that is in the battery cathode end of the described part of pegging graft is detected in the negative pole test side, with the magnitude of voltage of the higher person in the detected value of the detected value of described anodal test side and described negative pole test side as the described part of pegging graft.
8. charge control method as claimed in claim 7 is characterized in that, among the described step b, when the magnitude of voltage that detects the part of pegging graft is lower than the setting max-thresholds but is higher than normality threshold, with the setting current value charging less than the normal charging current value.
9. such as claim 7 or 8 described charge control methods, it is characterized in that, among the described step b, when the magnitude of voltage that detects the part of pegging graft is higher than normality threshold, alarm prompt.
CN 201110072431 2011-03-24 2011-03-24 Charging connector contact resistance detection device and charging control method CN102111006B (en)

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Application Number Priority Date Filing Date Title
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CN102111006B true CN102111006B (en) 2013-01-16

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CN103487717B (en) * 2013-10-14 2016-03-09 奇瑞新能源汽车技术有限公司 A kind of battery testing system and battery detection method
CN105550092A (en) * 2015-12-07 2016-05-04 联想(北京)有限公司 Information processing method and electronic device
CN106253415A (en) * 2016-09-14 2016-12-21 努比亚技术有限公司 A kind of charge control method and device
DE102016219975A1 (en) * 2016-10-13 2018-04-19 BSH Hausgeräte GmbH Domestic appliance with a plug connection to a power cord
CN108631373B (en) * 2017-03-17 2020-02-28 苏州宝时得电动工具有限公司 Butt-joint charging system
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CN108318741B (en) * 2018-03-14 2020-04-07 维沃移动通信有限公司 Impedance detection circuit and detection method
CN109856456A (en) * 2018-12-07 2019-06-07 维沃移动通信有限公司 A kind of method, electronic equipment, power supply adaptor and system measuring impedance
CN109980727A (en) * 2019-03-29 2019-07-05 维沃移动通信有限公司 A kind of terminal, charger and charge protection method
CN110829520A (en) * 2019-10-28 2020-02-21 量道(厦门)新能源科技有限公司 Charging connection reliability detection and charging control circuit and method

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CN106299180A (en) * 2015-06-24 2017-01-04 南京德朔实业有限公司 Electric tool and the combination of battery bag
CN106299180B (en) * 2015-06-24 2019-03-08 南京德朔实业有限公司 The combination of electric tool and battery pack

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