CN202008524U - Charging connector contact resistance detector and charging post - Google Patents

Abstract

The utility model discloses a charging connector contact resistance detector and a charging post, which comprises a detection unit and a control unit, wherein the detection unit is arranged at a power supply end and detects voltage value of a socket portion between the power supply end and a battery. When the voltage value of the socket portion is higher than the maximum set threshold, charging is stopped; and when the voltage value of the socket portion is lower than the normal threshold, the control unit controls charging with normal current value. The charging connector contact resistance detector can be used for detecting the socket portion, controls charging according to detection results, and can effectively prevent defects caused by poor contact of the socket portion.

Description

Charging connector contact resistance pick-up unit and charging pile

Technical field

The utility model relates to the power battery charging technology, particularly relates to a kind of charging connector contact resistance pick-up unit and charging pile.

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 electric battery.There is very big hidden danger in this charging modes, because of the power battery pack charging is carried out outdoor mostly, environment is harsh, its charging plug and socket are subjected to misoperation or outside contamination easily and cause loose contact, contact resistance increases, and when big charging current is passed through, will produce very big 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 influence the quality of charging each time.

The utility model content

Fundamental purpose of the present utility model is exactly at the deficiencies in the prior art, and a kind of charging connector contact resistance pick-up unit and a kind of charging pile are provided, and can effectively avoid dividing contact the bad problem of bringing because of the Plug Division.

For achieving the above object, the utility model is by the following technical solutions:

A kind of charging connector contact resistance pick-up unit, comprise detecting unit and control module, the feeder ear of charging equipment and the part of the grafting between the battery are coupled to be used to detect the voltage of this part in the test side of described detecting unit, the input end of described control module is coupled to the output terminal of described detecting unit, and the output terminal of described control module is coupled to charging circuit in the charging equipment to be used for according to the testing result of described detecting unit control charging current value or to stop charging.

Described detecting unit comprises anodal test side and negative pole test side, and the branch road that is in the anode end of the described part of pegging graft is coupled in described anodal test side, and the branch road that is in the battery cathode end of the described part of pegging graft is coupled in described negative pole test side.

Also comprise the Alarm Unit that links to each other with described control module.

Described Plug Division branch comprises the socket that plug joins with it.

A kind of charging pile for the power battery pack power supply comprises aforesaid a kind of charging connector contact resistance pick-up unit.

The utility model beneficial technical effects is:

Use the charging of charging connector contact resistance pick-up unit control of the present utility model to battery, can be achieved as follows charging modes: have only when detecting contact resistance in allowed band when (being reflected) by the voltage on it, just start normal large current charge, when non-allowed band, stop charging, can also carry out the derate charging according to the contact situation, to reduce the charging risk.The utility model can detect the situation that is connected of charging grafting part (as the plug of feeder ear and the socket of battery-end) earlier before charging normal, thereby effectively avoids dividing contact problems affect charge efficiency because of the Plug Division, even causes the problem of more serious charging accident.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the utility model device;

The structure principle chart that Fig. 2 charges for the embodiment that uses the utility model device;

Fig. 3 is for using the charging control flow chart of an embodiment of the utility model.

Embodiment

In conjunction with the accompanying drawings the utility model is further described in detail by the following examples.

Referring to Fig. 1, the charging connector contact resistance pick-up unit of an embodiment comprises detecting unit and control module, the feeder ear of charging equipment and the grafting part between the battery are coupled in the test side of described detecting unit, the input end of described control module is coupled to the output terminal of described detecting unit, and the output terminal of described control module is coupled to the charging circuit in the charging equipment.Line among Fig. 1 between the each several part just schematically.Described detecting unit detects the magnitude of voltage of the grafting part between feeder ear and the battery, and described control module is according to the testing result control charging of 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 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 pick-up unit also comprises Alarm Unit, 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 module.

See also Fig. 2, in one embodiment, preferably, described detecting unit comprises anodal test side and negative pole test side, the branch road that is in the anode end of the described part of pegging graft is coupled in described anodal test side, the branch road that is in the battery cathode end of the described part of pegging graft is coupled in described negative pole test side, 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 bigger 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 module control is 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.

See also Fig. 1, the charging pile of an embodiment comprises above-mentioned a kind of charging connector contact resistance pick-up unit, and this charging pile can be used for powering to power battery pack.

Typical Plug Division branch comprises the socket that plug joins with it.Plug and socket can select to be arranged on feeder ear or battery-end respectively.

Be that example further specifies charging connector contact resistance pick-up unit and corresponding charge control method with a preferred embodiment below.

Referring to Fig. 2, one group of complete charging equipment comprises a charging output plug and the socket that is installed on the power battery pack.Plug and socket comprises 4 interconnective one to one terminals at least, is respectively anodal A1 of charging plug and the anodal A2 of electric battery socket; Charging plug negative pole B1 and electric battery socket negative pole B2.Preferably, detecting unit comprises: the charging plug detection terminal C1 of anode end and electric battery socket detection terminal C2, and electric battery socket detection terminal C2 is connected with battery anode A2; And the charging plug detection terminal D1 of battery cathode end and electric battery socket detection terminal D2, electric battery socket detection terminal D2 is connected with electric battery negative pole B2.

Referring to Fig. 3, charging detects control procedure and 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 signal wire and the voltage signal between the detection terminal D1, show that then charging plug is electrically connected with the electric battery socket, the contact resistance of control module start detection charging plug and electric battery socket and correspondingly control charging, process is as follows:

The first step, charging station starts charging, load known quantitative (generally less) charging current, the detecting unit of charging station is coupled to terminal A 0 and end points C0, detect the voltage between it, 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 anodal A1 of charging plug and electric battery socket positive pole A2, detecting unit is coupled to terminal B 0 and end points D0 simultaneously, detect the voltage between it, 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 anodal B1 of charging plug and electric battery socket negative pole B2.

Second step, control module is compared the voltage V2 between terminal A 0 and the end points C0 with normal setting value, terminal B 0 is compared with normal setting value with the voltage between the end points D0, if aforementioned both magnitude of voltage all is lower than normal setting value, judge that then charging plug contacts well with the electric battery socket, can charge normal, charging station just can start the program of charging normal to batteries charging.

The 3rd step, judgement by 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 electric battery socket, cannot charge, control module just sends the serious bad indication of contact, and prompting reconnects after need handling plugs and sockets again, repeats aforementioned trace routine.

The 4th step, judgement by 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 rapid charge, control module sends the indication of loose contact, continues charging but can reduce charging current.

Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.

Claims (5)

1. charging connector contact resistance pick-up unit, it is characterized in that, comprise detecting unit and control module, the feeder ear of charging equipment and the part of the grafting between the battery are coupled to be used to detect the voltage of this part in the test side of described detecting unit, the input end of described control module is coupled to the output terminal of described detecting unit, and the output terminal of described control module is coupled to charging circuit in the charging equipment to be used for according to the testing result of described detecting unit control charging current value or to stop charging.

2. charging connector contact resistance pick-up unit as claimed in claim 1, it is characterized in that, described detecting unit comprises anodal test side and negative pole test side, the branch road that is in the anode end of the described part of pegging graft is coupled in described anodal test side, and the branch road that is in the battery cathode end of the described part of pegging graft is coupled in described negative pole test side.

3. charging connector contact resistance pick-up unit as claimed in claim 1 or 2 is characterized in that, also comprises the Alarm Unit that links to each other with described control module.

4. charging connector contact resistance pick-up unit as claimed in claim 1 or 2 is characterized in that described Plug Division branch comprises the socket that plug joins with it.

5. the charging pile for the power battery pack power supply is characterized in that, comprises each described charging connector contact resistance pick-up unit as claim 1-4.

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