Summary of the invention
In view of this, the object of the present invention is to provide a kind of charging circuit, to control the charging current of open type lead acid accumulator in charging process, thus avoid lead acid accumulator in charging process, enter into hyperpolarization state;
Another object of the present invention is to provide a kind of charger applying above-mentioned charging circuit.
For achieving the above object, the invention provides following technical scheme:
A kind of charging circuit, for in the charging process to open type lead acid accumulator, it is characterized in that, divider resistance is in series with in described charging circuit, and described divider resistance is parallel with described divider resistance short circuit when the gassing rate of described open type lead acid accumulator is less than or equal to preset value, preset value is greater than at the gassing rate of described open type lead acid accumulator, and the gassing rate of described lead acid accumulator is when being greater than the critical polarization gassing rate of this battery, make the control device of described divider resistance place in circuit.
Preferably, described control device comprises:
Contact switch, described contact switch comprises contact and contact, described contact is fixedly installed on connecting rod, and by described divider resistance short circuit when described contact contacts with described contact, makes described divider resistance access charging circuit when described contact and described contact disconnect;
Gas collection cylinder, described gas collection cylinder comprises cylinder body and is set in the piston in described cylinder body, described cylinder body offers the air admission hole for collecting the gas that described open type lead acid accumulator is separated out, the sidewall of described cylinder body offers the steam vent for being vented, and the cylinder body volume between the bottom of described steam vent and described cylinder body equals the preset value of described gassing rate; Described piston can by described connecting rod jack-up away from the bottom end of described cylinder body, and described in described piston closes during steam vent, described contact and described contact, when the open described steam vent of described piston, described contact and described contact depart from;
Fixture, described fixture is arranged near described piston one end away from the bottom of described cylinder body;
Elastic pressure parts, described elastic pressure parts one end and described fixture offset, the other end when the open described steam vent of described piston and the end of described piston offset.
Preferably, in described charging circuit, be in series with multiple divider resistance, and described control device comprises:
Contact switch, described contact switch comprise with described divider resistance one to one contact and with described contact contact one to one, described contact is all fixedly connected on same connecting rod, and described contact when contacting with described contact by the described divider resistance short circuit of its correspondence, make the described divider resistance access charging circuit of its correspondence when described contact and described contact disconnect;
Gas collection cylinder, described gas collection cylinder comprises cylinder body and is set in the piston in described cylinder body, described cylinder body offers the air admission hole for collecting the gas that described open type lead acid accumulator is separated out, the sidewall of described cylinder body offers quantity consistent with described divider resistance and be positioned at the steam vent of differing heights position, and and cylinder body volume between the nearest steam vent of described cylinder base and the bottom of described cylinder body equal the preset value of described gassing rate; Described piston can by described connecting rod jack-up away from the bottom end of described cylinder body, and described in described piston closes during steam vent, drive the contact corresponding to described steam vent and described contact, when the open described steam vent of described piston, the contact corresponding to described steam vent and described contact is driven to depart from;
Fixture, described fixture is arranged near described piston one end away from the bottom of described cylinder body;
Elastic pressure parts, described elastic pressure parts one end and described fixture offset, and during the described steam vent that the other end is open at described piston and described cylinder base the is nearest and end of described piston offsets.
Preferably, described air admission hole is opened in the bottom of described cylinder body.
Preferably, described elastic pressure parts is stage clip.
Preferably, also comprise the safe air outlet on the sidewall being opened in described cylinder body, described safe air outlet is greater than the distance of described steam vent to the bottom of described cylinder body to the distance of the bottom of described cylinder body.
Preferably, described safe air outlet is provided with multiple.
As can be seen from above-mentioned technical scheme, divider resistance is in series with in charging circuit provided by the invention, and divider resistance is also parallel with control device, control device when the gassing rate of open type lead acid accumulator is less than or equal to preset value by divider resistance short circuit, and be greater than preset value at the gassing rate of open type lead acid accumulator, and when the gassing rate of open type lead acid accumulator is greater than the critical polarization gassing rate of battery, divider resistance is linked in charging circuit.
In the charging circuit provided in the present invention, the gassing rate preset value of open type lead acid accumulator is total gassing rate critical value that open type storage battery is about to when entering into critical polarization, when the gassing total amount of open type lead acid accumulator does not reach preset value, it generally can not enter critical polarized state, thus now can not limit the electric current of whole charging circuit, namely divider resistance is in short circuit state, but for any one open type lead acid accumulator, it has theoretical critical polarization gassing rate, the gassing rate total when open type lead acid accumulator reaches preset value, and its gassing rate is greater than critical polarization gassing rate, illustrate that battery enters critical polarized state, now need to control the electric current in charging circuit, go on into excessive polarized state to avoid open type lead acid accumulator, controller now makes divider resistance be linked in charging circuit, electric current in charging circuit is reduced, thus effectively avoid open type lead acid accumulator in charging process, enter into hyperpolarization state.
As can be seen here; can realize adjusting the control of the charging current of whole charging circuit from the gassing rate in charging process by open type storage battery in charging circuit provided by the present invention; thus effectively prevent open type storage battery in charging process, enter into hyperpolarization state, effective protection is defined to open type storage battery.
The present invention also provides a kind of charger, and the charging circuit in this charger is the charging circuit as above described in any one.
Because above-mentioned charging circuit has above-mentioned technique effect, the charger therefore comprising this charging circuit also has above-mentioned technique effect, repeats no more in present specification.
Embodiment
Core of the present invention is to provide a kind of charging circuit, to control the charging current of open type lead accumulator in charging process, thus avoids lead accumulator in charging process, enter into hyperpolarization state;
Another core of the present invention is to provide a kind of charger applying above-mentioned charging circuit.
The charging circuit provided in the present invention, be mainly used in the charging process to open type lead acid accumulator (or claiming lead accumulator), the core improvement of this charging circuit is, divider resistance R is in series with in charging circuit, and divider resistance R is parallel with control device, this control device can when the gassing rate of open type lead acid accumulator is less than or equal to preset value by divider resistance R short circuit, preset value is greater than at the gassing rate of open type lead acid accumulator, and when the gassing rate of open type lead acid accumulator is greater than the critical polarization gassing rate of this battery, divider resistance R is linked in charging circuit.
In the charging circuit provided in the present embodiment, the gassing rate preset value of open type lead acid accumulator is total gassing rate that open type storage battery is about to when entering into critical polarization, when the gassing total amount of open type lead acid accumulator does not reach preset value, it generally can not enter critical polarized state, thus now can not limit the electric current of whole charging circuit, namely divider resistance R is in short circuit state, but for any one open type lead acid accumulator, it has theoretical critical polarization gassing rate, the gassing rate total when open type lead acid accumulator reaches preset value, and its gassing rate is greater than critical polarization gassing rate, illustrate that battery enters critical polarized state, now need to control the electric current in charging circuit, go on into excessive polarized state to avoid open type lead acid accumulator, controller now makes divider resistance R be linked in charging circuit, electric current in charging circuit is reduced, thus effectively avoid open type lead acid accumulator in charging process, enter into hyperpolarization state.
As can be seen here; can realize adjusting the control of the charging current of whole charging circuit from the gassing rate in charging process by open type storage battery in charging circuit provided by the present invention; thus effectively prevent open type storage battery in charging process, enter into hyperpolarization state, effective protection is defined to open type storage battery.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1 to Fig. 4, the connection diagram of the charging circuit that Fig. 1 provides for the embodiment of the present invention and battery; Fig. 2 is the control device that provides in the embodiment of the present invention structural representation when piston closes steam vent; The structural representation of control device when piston will open steam vent that Fig. 3 provides for the embodiment of the present invention; The structural representation of control device when piston opens steam vent that Fig. 4 provides for the embodiment of the present invention.
Divider resistance R connects in the charge circuit, and divider resistance R is parallel with a control loop, control loop is provided with contact switch K, please refer to Fig. 1, when contact switch K closes, divider resistance R is overall by short circuit, resistance now in whole charging circuit is less, charging current is larger, when contact switch K disconnects, divider resistance R entirety is linked in charging circuit, because whole charging circuit resistance value increases, and charging voltage is constant, thus can obtain according to Ohm's law, electric current in charging circuit will reduce, the reduction of charging current then effectively can reduce the degree of polarization of lead acid accumulator.
Provide a kind of specific implementation form of control device in the embodiment of the present invention, please also refer to Fig. 2, Fig. 3 and Fig. 4, this control device comprises contact switch K, gas collection cylinder, fixture 1 and elastic pressure parts 2.
Wherein contact switch K comprises contact 7 and contact 8, and contact 8 is fixedly installed on connecting rod 9, contact 7 generally comprises the first contact and the second contact, connecting rod 9 is through the gap the first contact and the second contact, be fixed in the contact 8 on connecting rod 9 is provided with for respectively with the contact site of the first contact and the second contact, when contact 7 contacts with contact 8, so contact switch K closes, known with reference to figure 1, now divider resistance R will by short circuit, divider resistance R is inoperative in whole charging circuit, when contact 7 and contact 8 disconnect, contact switch K disconnects, known with reference to figure 1, now divider resistance R will be linked in charging circuit, for limiting the electric current in whole charging circuit.Wherein, those skilled in the art it is easily understood that, the resistance of divider resistance R reasonably should be selected, so that can by the current limit in whole charging circuit in suitable scope after divider resistance R is linked in charging circuit according to the difference of the open type lead acid accumulator of charging;
Gas collection cylinder specifically comprises cylinder body 5 and is set in the piston 3 of cylinder body 5 inside, cylinder body 5 is provided with the air admission hole 6 for collecting the gas that open type lead acid accumulator is separated out, and the steam vent 4 be also provided with on the sidewall of cylinder body 5 for Exhaust Gas, cylinder body volume between bottom steam vent 4 and cylinder body 5 should equal the preset value of gassing rate, piston 3 can by connecting rod 9 jack-up away from the one end bottom cylinder body 5, as shown in Figure 4, therefore piston 3 is by moving up and down, and can realize the disconnection of contact switch K and close.Concrete, contact 8 and piston 3 are split-type structural away from the one end (this end also can be provided with piston rod) bottom cylinder body 5, when piston 3 is moved up by gas push, once the bottom of piston 3 departs from steam vent 4, namely steam vent 4 is decontroled by piston 3, and now piston 3 will connecting rod 9 jack-up away from the one end bottom cylinder body 5, and the contact 8 be fixed on connecting rod 9 will by jack-up, contact switch K disconnects, and divider resistance R is linked in charging circuit; When piston 3 moves down, once steam vent 4 is closed by the bottom of piston 3, piston 3 will depart from connecting rod 9 away from the one end bottom cylinder body 5, and now connecting rod 9 and contact 8 will realize the contact with contact 7 under the effect of self gravitation, contact switch K closes, and divider resistance R is by short circuit;
Fixture 1 is arranged away from the one end bottom cylinder 5 body near piston 3;
One end of elastic pressure parts 2 is fixedly connected with fixture 1, and its other end when the open steam vent 4 of piston 3 and piston 3 end offset, and provide the thrust moved downward for piston 3.
What needs were described is, gassing rate preset value in above-described embodiment should change according to different open type lead acid accumulators, find through large quantifier elimination, this preset value generally can be set to " AH(ampere-hour the number) " 20-22 that is capacitance values when unit represents battery capacity to be charged doubly, and the unit of preset value should be " ml ".
After reaching gassing rate preset value when gassing rate, the disconnection of contact switch K and closed be determine according to the relation between the gassing rate of now open type lead acid accumulator and critical polarization gassing rate, namely when gassing rate is greater than critical polarization gassing rate, contact switch K disconnects, when gassing rate is less than or equal to critical polarization gassing rate, contact switch K closes, thus steam vent 4 is when designing, and should ensure that the deflation rate of steam vent 4 is equal with the critical polarization gassing rate of this open type lead acid accumulator.
The control principle of the control device provided in above-described embodiment is as follows:
Air admission hole 6 is connected with the steam vent 4 of open type lead acid accumulator (hereinafter referred to as storage battery), in the charging incipient stage, the gas that storage battery is separated out enters into gas collection cylinder by air admission hole 6, the piston 3 of gas collection cylinder moves up gradually under the promotion of gas, and now piston 3 does not contact with connecting rod 9 away from the one end bottom cylinder body 5, as shown in Figure 2, contact switch K is now closed, divider resistance R is by short circuit, and thus now storage battery charges under normal voltage and current;
Along with increasing gradually of gassing rate, piston 3 moves in continuation, when the bottom of piston 3 just moves to concordant with steam vent 4 upper end, now piston 3 just contacts with connecting rod 9 away from the one end bottom cylinder body 5, if gassing rate increases further, now piston 3 is open by steam vent 4, simultaneously, connecting rod 9 is by jack-up, contact switch K disconnects, divider resistance R is connected in charging circuit, play the effect of dividing potential drop and reduction charging current, if now the gassing rate of storage battery is greater than the deflation rate of steam vent 4, so steam vent 4 is opened continuing, divider resistance R is maintained by the present situation of connecting in charging circuit,
When the gassing rate of storage battery is less than critical polarization gassing rate (i.e. the deflation rate of steam vent 4), under the elastic force effect of elastic pressure parts 2, piston 3 will move downward, partially enclosed steam vent gradually, make feed rate equal with deflation rate, now make piston 3 be in poised state, and now contact 8 will contact again with contact 7, contact switch K closes, and divider resistance R is again by short circuit.
Gassing rate once storage battery exceedes critical polarization gassing rate again, and divider resistance R will be linked in charging circuit again.
As can be seen here, the control device provided in above-described embodiment can get involved the control of electric current in whole charging circuit when the gassing rate of storage battery reaches preset value, if the gassing rate of storage battery is greater than critical polarization gassing rate, so divider resistance R is accessed charging circuit, to reduce charging current, if the gassing rate of storage battery is less than or equal to critical polarization gassing rate, then keep current charging current constant.
A nearlyer step, the charging circuit of a kind of access classes divider resistance R is additionally provided in the embodiment of the present invention, concrete, multiple divider resistance R is in series with in this charging circuit, and each divider resistance R is all in parallel with control device, this control device comprises contact switch K, gas collection cylinder, fixture 1 and elastic pressure parts 2.
Wherein contact switch K comprise with divider resistance R one to one contact 7 and with contact 7 contact 8 one to one, and each contact 8 is all fixedly connected on same connecting rod 9, can, by the divider resistance R short circuit of its correspondence, the divider resistance R of its correspondence can be made to be linked in charging circuit when contact 7 and contact 8 disconnect when contact 7 contacts with contact 8;
The piston 3 that gas collection cylinder comprises cylinder body 5 and is set in cylinder body 5, and cylinder body 5 offers air admission hole 6, and it is consistent with divider resistance R and be positioned at the steam vent 4 of differing heights position cylinder body 5 sidewall to offer quantity, and bottom the nearest steam vent 4 of cylinder body 5 distance from bottom and cylinder body 5 between cylinder body volume equal the preset value of gassing rate; Piston 3 can by described connecting rod 9 jack-up away from the bottom end of described cylinder body 5, and when described piston 3 closes described steam vent 4, the corresponding contact 8 of described steam vent 4 contacts with described contact 7, when the open described steam vent 4 of described piston 3, the corresponding contact 8 of described steam vent 4 departs from described contact 7;
Fixture 1 is identical with the set-up mode of elastic pressure parts 2 with the fixture 1 in above-described embodiment with elastic pressure parts 2, no longer repeats in the present embodiment at this.
In order to ensure when its corresponding contact 7 of contact 8 of bottommost departs from, other contacts 8 still contact with contact 7, need to arrange stage clip on the contact 8 except the contact 8 of bottommost, and the length of stage clip should increase along with the rising of contact 8.
Illustrate in the present embodiment and the situation being in series with three divider resistance R in charging circuit is described, and contact 8 position being in bottommost is defined as the first order, upwards be respectively the second level successively, the third level etc., like this after its corresponding contact 7 of first order contact 8 departs from, second level contact 8 still can be contacted by stage clip with its contact 7, move on piston 3 continues and cause the stage clip of the second level to be stretched out completely and after departing from contact 7, the stage clip of the third level is not still stretched out completely, and its corresponding contact 7 is still kept in touch, until piston 3 moves on continuing, third level stage clip is stretched out completely, now three divider resistance R are just connected in series in charging circuit completely.
As can be seen here, the charging circuit provided in the present embodiment achieves and controls the level that has of electric current in open type lead acid battery charge process.
On the sidewall that air admission hole 6 in above-described embodiment can be opened in cylinder body 5 or bottom, the air admission hole 6 provided in present specification embodiment is opened in the bottom of cylinder body 5.
A nearlyer step, in order to ensure the safety of charging, the safe air outlet be arranged on cylinder body 5 sidewall is also comprised in the present embodiment, and the distance bottom safe air outlet to cylinder body 5 should be greater than the distance bottom steam vent 4 to cylinder body 5, safe air outlet is mainly used in when the pressure of cylinder body 5 inside exceedes certain limit, release can be carried out to cylinder body 5 inside rapidly, damage with blast protection.
Therefore, it is comparatively large that safe air outlet can be offered, or can offer multiple safe air outlet on cylinder body 5 sidewall, to ensure the safety of charging.
Also disclose a kind of charger in the embodiment of the present invention, and the charging circuit in this charger is charging circuit disclosed in above-described embodiment, therefore this charging circuit has all technique effects of charging circuit in above-described embodiment concurrently, repeats no more herein.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.