CN202886568U

CN202886568U - Battery-charging detection system

Info

Publication number: CN202886568U
Application number: CN 201220426204
Authority: CN
Inventors: 陈艇; 王云杰; 严国刚
Original assignee: Microvast Power Systems Huzhou Co Ltd
Current assignee: Microvast Power Systems Huzhou Co Ltd
Priority date: 2012-08-27
Filing date: 2012-08-27
Publication date: 2013-04-17
Anticipated expiration: 2022-08-27

Abstract

The utility model provides a battery-charging detection system, comprising a charging module, a public bus anode, a public bus cathode, a relay, a battery consisting of a plurality of battery modules and a circuit detection system, wherein the public bus anode is connected with an anode terminal of the battery and the public bus cathode is connected with a cathode terminal of the battery. The public bus anode is provided with anode branches connected with anodes of the battery modules and the amount of the anode branches is the same to the amount of the battery modules. The public bus cathode is provided with cathode branches connected with cathodes of the battery modules and the amount of the cathode branches is the same to the amount of the battery modules. By adopting the technical scheme provided by the utility model, when a compensation device is used to compensate for the battery, a circuit short-circuit phenomenon caused by relay aging is effectively avoided and safe switching of the battery modules in large-scale batteries can be satisfied. A mistake of charging circuit connection is prevented, battery recoiling is avoided and the direct short-circuit phenomenon is prevented. Security of a whole charging process is ensured, and safety of life and property is protected.

Description

The batteries charging detection system

Technical field

The utility model relates to a kind of charging detection system.

Background technology

Traditional lithium ion battery group is comprised of several power brick connection in series-parallel, electric battery is after discharging and recharging for a long time, the power brick of electric battery causes unbalanced phenomena easily, mend electricity so after electric battery has been used a period of time, just need to carry out equilibrium to it, common benefit electric hand section is to use less electric current that it is continued charging, the battery of owing electricity is full of electricity, can so that electric battery is recovered initial use state, increases application performance and serviceable life.

But in practical operation, the corresponding little electric current ancillary equipment of each power brick still considers it all is impossible from the complexity of system from cost consideration, therefore in the urgent need to a kind of equipment that can make things convenient for, effectively power brick be carried out complementary energy; In the prior art, use a kind of electric current ancillary equipment that whole power brick is charged, the electric current ancillary equipment can all fill multi-string battery by the mode of switching, the mode that is relay array realizes, so long as the switching by relay array, which kind of array way all exists the process that switches to another crosstalk pond by a string battery of relay from power brick, therefore in this process following situation might occur: control signal has realized successful switch, but because relay is long-time, high-frequency switching causes losing efficacy and is sticked together, just might cause two crosstalk ponds to be short-circuited by relay, cause the generation of accident; In addition the aspect since battery cloth electricity need to from power brick, draw wire harness in each battery unit and connect respectively charging equipment, the complexity of its wire harness is well imagined, it is very large to connect the possibility of makeing mistakes, if the wrong situation occurs, might cause recoil or the phenomenon that directly is short-circuited to battery, cause easily security incident, the threat to life property safety.

The utility model content

The purpose of this utility model provides and a kind ofly can effectively detect the unusual batteries charging detection system of charging circuit.

For reaching above-mentioned purpose, the utility model provides a kind of batteries charging detection system, it comprise charging module, common bus just, negative, the relay of common bus, the electric battery and the checking system for PCB that are formed by several battery modules, common bus is just connecting the positive terminal of electric battery, it is just negative with common bus that the negative negative terminal that connects electric battery of common bus, charging module connect common bus; The just upper setting of common bus anodal branch line identical with battery module quantity and that be connected with the battery module positive pole, the negative upper negative pole branch line identical with battery module quantity and that be connected with the battery module negative pole that arranges of common bus arranges respectively relay on anodal branch line and the negative pole branch line; Common bus just is being connected all with common bus and is being connected with checking system for PCB.

Common bus is just connecting the positive terminal of electric battery, and it is just negative with common bus that the negative negative terminal that connects electric battery of common bus, the positive pole of charging module and negative pole respectively connect common bus.

Battery module in the electric battery is just born positive terminal and the negative terminal that is connected to electric battery with common bus by common bus.

The just upper setting of common bus anodal branch line identical with battery module quantity and that be connected with the battery module positive pole, the negative upper negative pole branch line identical with battery module quantity and that be connected with the battery module negative pole that arranges of common bus arranges respectively relay on anodal branch line and the negative pole branch line;

Each battery module in the electric battery is connected to common bus by anodal branch line and negative pole branch line with both positive and negative polarity and just bears with common bus, and at branch line the break-make that relay can be controlled battery module effectively is set, and more efficient than manual switching, reliability is higher.

As preferably, anodal comparator circuit, negative pole comparator circuit, trigger unit, testbus are set in the described checking system for PCB; Anodal comparator circuit and negative pole comparator circuit are in parallel and be connected in series by testbus and trigger unit mutually.

The comparator circuit that arranges in the checking system for PCB is connected to trigger unit after can detecting the voltage that the electric battery common bus is negative and common bus is positive, feeds back accurately result by trigger unit;

As preferably, described anodal comparator circuit comprises anodal relay and anodal comparing unit, and anodal comparing unit just is connected with common bus by anodal relay.

Comparing unit is a kind of output quantity numerical value can being compared with the reference value of regulation, to produce the device of a difference signal (error signal);

Output high level when the cathode voltage that detects comparing unit is higher than the comparing unit cathode voltage, the output low level when cathode voltage that detects comparing unit is lower than the comparing unit cathode voltage, when only the voltage of the detection part output on common bus is just negative with common bus all was high level, the voltage on the testbus just was high level; When the voltage of the detection part output on common bus is just negative with common bus was inconsistent, electric current passed through the comparing unit ground connection of output low level, at this moment output low level;

Anodal relay can be controlled anodal comparing unit and the break-make that common bus just is being connected, and detects neatly.

As preferably, described negative pole comparator circuit comprises negative pole relay and negative pole comparing unit, and the negative pole comparing unit just is connected with common bus by the negative pole relay.

The negative pole relay can be controlled negative pole comparing unit and the break-make that common bus just is being connected, and detects neatly.

As preferably, described trigger unit comprises input power, optocoupler sensor and electric capacity.

The optocoupler sensor also claims photoisolator or photoelectrical coupler, it is the device that comes transmission of electric signals take light as medium, illuminator emits beam when input end adds electric signal, and light-receiving device is accepted just to produce photocurrent after the light, flows out from output terminal, thereby realized " electricity-light-electricity " conversion, volume is little because it has, the life-span is long, contactless, and antijamming capability is strong, insulation between output and the input, the advantages such as one-way transmission signal obtain to use widely in digital circuit.

When being high level on the testbus, the optocoupler sensor is not luminous, shows relay work, the phenomenon that do not stick together, and when being low level on the testbus, the optocoupler sensor is luminous, shows certain relay operation irregularity, has adhesion phenomenon to occur.

As preferably, described anodal comparing unit comprises input power, resistance, electric capacity and anodal comparer, and the input power of anodal comparing unit and resistance are connected with diode and are connected isolator after connecting.

The input power of anodal comparing unit and resistance be connected with diode be connected isolator after connecting after, the positive terminal voltage of anodal comparer will be less than 1V under the effect of resistance and diode.

As preferably, described negative pole comparing unit comprises input power, resistance, electric capacity and comparer.

Input power is powered to comparing unit, and electric capacity is used for filtering, and resistance prevents electric battery electric leakage when detecting.

As preferably, the negative pole of described anodal comparer is connected with anodal relay, and the resistance in the positive pole of anodal comparer and the anodal comparing unit is connected in series.

The negative pole of anodal comparer is connected with anodal relay, just is being connected to common bus by anodal relay; The positive pole of anodal comparer and the resistance in the anodal comparing unit are connected in series, and the cathode voltage of anodal comparer is less than 1V.

As preferably, the positive pole of described negative pole comparer is connected with the negative pole relay, is connected with the positive pole of the highest battery module of current potential in the electric battery behind the negative pole contact resistance of negative pole comparer.

The reference voltage of the negative pole of negative pole comparer is the voltage of the highest crosstalk pond module in the detected electric battery.

As preferably, described resistance comprises that resistance is the resistance of 100 Κ Ω.

Using resistance is the resistance of 100 Κ Ω, and the battery module electric leakage can prevent that the input power of comparing unit is to charging battery module simultaneously in the time of can preventing from detecting.

As preferably, the voltage of described input power is greater than the voltage of electric battery.

The voltage of the input power of negative pole comparing unit guarantees when relay all works that greater than the voltage of electric battery input voltage is exported high level greater than the reference voltage of negative pole.

As preferably, described input power is identical with the input voltage of comparing unit.

The advantage of the batteries charging detection system that the utility model provides is: when using the electric equipment of benefit that electric battery is mended electricity, the short circuit phenomenon that can effectively avoid Relay Aging to cause avoids causing the generation of accident; Can satisfy the handoff-security of battery module in the large-sized battery pack, can prevent that the charging circuit connection from makeing mistakes, avoid battery is caused recoil and prevents from directly being short-circuited phenomenon, guarantee the security of whole charging process, the protection security of the lives and property.

Description of drawings

Fig. 1 is the charging circuit synoptic diagram of batteries charging detection system.

Fig. 2 is the testing circuit synoptic diagram of batteries charging detection system.

Wherein: 1, common bus just, 11, relay, 2, common bus is negative, 21, the negative pole comparing unit, 22, anodal comparing unit, 3, the optocoupler sensor, 4, testbus.

Embodiment

Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated.

Such as Fig. 1-shown in Figure 2, the utility model comprises that charging module, common bus are positive 1, common bus is negative 2, relay, the electric battery and the checking system for PCB that are comprised of the battery module of 8 3.2V, common bus positive 1 connects the positive terminal of electric battery, common bus negative 2 connects the negative terminal of electric battery, and charging module connects common bus positive 1 and common bus negative 2; Anodal branch line identical with battery module quantity and that be connected with the battery module positive pole is set on the common bus positive 1, on the common bus negative 2 negative pole branch line identical with battery module quantity and that be connected with the battery module negative pole is set, on anodal branch line and the negative pole branch line relay is set respectively; Common bus positive 1 is connected 2 with common bus and all is connected with checking system for PCB, and comparing unit 21, trigger unit 3, testbus 4 and relay 11 wherein are set in the checking system for PCB.

Common bus positive 1 is connected on the testbus 4 after being connected in series by relay 12 and comparing unit 22, and common bus negative 2 is connected on the testbus 4 after being connected in series by relay 11 and comparing unit 21, and testbus 4 directly is connected with optocoupler sensor 3; The supply voltage of comparing unit 22 is 24V, and be connected isolator with diode by resistance, comparer in the comparing unit 22 is connected with input power by resistance, the supply voltage of comparing unit 21 is 24V, the comparer that input power connects in the comparing unit 21 is anodal, connect with the maximum potential of electric battery behind the comparer negative pole contact resistance in the comparing unit 21, more than the resistance of all uses be 100 Κ Ω; Trigger unit 3 comprises input power, optocoupler sensor and the electric capacity of 24V, is connected isolator after input power and the capacitances in series.

Claims

One kind the charging detection system, comprise charging module, common bus just, negative, the charge relay of common bus, the electric battery and the checking system for PCB that are formed by several battery modules, common bus is just connecting the positive terminal of electric battery, it is just negative with common bus that the negative negative terminal that connects electric battery of common bus, charging module connect common bus; The just upper setting of common bus anodal branch line identical with battery module quantity and that be connected with the battery module positive pole, the negative upper negative pole branch line identical with battery module quantity and that be connected with the battery module negative pole that arranges of common bus arranges respectively relay on anodal branch line and the negative pole branch line; Common bus just is being connected all with common bus and is being connected with checking system for PCB.
2. charging detection system according to claim 1 is characterized in that: anodal comparator circuit, negative pole comparator circuit, trigger unit, testbus are set in the described checking system for PCB; Anodal comparator circuit and negative pole comparator circuit are in parallel and be connected in series by testbus and trigger unit mutually.
3. charging detection system according to claim 2, it is characterized in that: described anodal comparator circuit comprises anodal relay and anodal comparing unit, and anodal comparing unit just is connected with common bus by anodal relay.
4. charging detection system according to claim 2, it is characterized in that: described negative pole comparator circuit comprises negative pole relay and negative pole comparing unit, and the negative pole comparing unit just is connected with common bus by the negative pole relay.
5. charging detection system according to claim 2, it is characterized in that: described trigger unit comprises input power, optocoupler sensor and electric capacity.
6. charging detection system according to claim 3, it is characterized in that: described anodal comparing unit comprises input power, resistance, electric capacity and anodal comparer, the input power of anodal comparing unit and resistance are connected with diode and are connected isolator after connecting.
7. charging detection system according to claim 4, it is characterized in that: described negative pole comparing unit comprises input power, resistance, electric capacity and comparer.
8. charging detection system according to claim 6, it is characterized in that: the negative pole of described anodal comparer is connected with anodal relay, and the resistance in the positive pole of anodal comparer and the anodal comparing unit is connected in series.
9. charging detection system according to claim 7, it is characterized in that: the positive pole of described negative pole comparer is connected with the negative pole relay, is connected with the positive pole of the highest battery module of current potential in the electric battery behind the negative pole contact resistance of negative pole comparer.
10. according to claim 6 to 9 each described charging detection systems, it is characterized in that: described resistance comprises that resistance is the resistance of 100 Κ Ω.
11. charging detection system according to claim 7 is characterized in that: the voltage of described input power is greater than the voltage of electric battery.
12. charging detection system according to claim 5 is characterized in that: described input power is identical with the input voltage of comparing unit.