CN209231489U - A kind of aging tester control circuit - Google Patents

The utility model discloses a kind of aging tester control circuits comprising main control module, the charging power modules connecting with main control module, charging and discharging circuit switching module and constant flow module；The charge and discharge switching module includes first switch, second switch, third switch, the 4th switch and the 5th switch, and the positive input terminal of the constant flow module is connect by the 4th switch with the anode of battery, and is switched by third and connect with the cathode of battery；The cathode of the constant flow module is connect by second switch with the cathode of the charging power modules, and is connect by the 5th switch with the cathode of battery, and the anode of the charging power modules is connected by the anode of first switch and battery.The utility model can test out to safety and precise the battery parameter of battery, and a set of metal-oxide-semiconductor is shared in charge and discharge process, can reduce probability of damage, and use constant-current discharge during discharge, will not cause shocking damage to battery.

A kind of aging tester control circuit

Technical field

The utility model relates to a kind of aging tester control circuit more particularly to a kind of safe and efficient aging testers Control circuit.

Background technique

With the development of new energy, dynamic lithium battery is widely used, the electric bicycle of market, toy, intelligence Energy door lock, street lamp, energy storage base station, electric tool, electric bus have all used lithium battery.It supports to develop new energy energetically in country Background under, the quantity of lithium battery demand increases substantially, and the test problem of battery capacity becomes one headache of battery processing factory The problem of.

Currently, aging tester on the market uses resistance-type to discharge mostly, this discharge mode is with battery electricity The reduction electric current of pressure can also become smaller therewith, not be able to satisfy the constant-current discharge purpose of client in this way.In addition, Ye You factory meeting on the market Using the discharge mode of MOS+ resistance-type, go to reach the constant of electric current using the switch-closed time of MOS, in this way in use process In seal in ammeter and can find that electric current is invariable, but actual current is suddenly big or suddenly small state, this aging equipment There is mortal injury to some battery protecting plates on the market, some battery protecting plates can use power by these ripples to breaking Pipe constant-current discharge, absolute constant of electric current, does not have any injury to protection board.

In addition, some aging testers will use a high voltage power supply on the market, then carry out constant pressure adjustment processing go to Battery pack charges, and this charging modes will do it high-voltage charging, protection board uses on the market under constant pressure runaway condition Metal-oxide-semiconductor is all to have certain pressure voltage, and when high pressure is greater than metal-oxide-semiconductor pressure voltage, battery protection moment can direct breakdown protection plate MOS, the battery for causing aging itself good, factory but become defective products, or battery is caused to charge accident on fire from explosion.Also When some aging testers discharge, instrument internal temperature may can reach 100 degree of even higher, and internal mainboards Also do not add isolating and protecting measure, this discharge mode equally exists security risk.

Utility model content

In order to overcome the deficiencies of the prior art and there are the problem of, the utility model provides a kind of ageing device control circuit, should Ageing device control circuit can test out to safety and precise the battery parameter of battery, and a set of function is shared in charge and discharge process Rate pipe can reduce probability of damage, and use constant-current discharge during discharge, will not cause shocking damage to battery.

The utility model is achieved through the following technical solutions: a kind of ageing device control circuit, including main control module, with Charging power modules, charging and discharging circuit switching module and the constant flow module of main control module connection, charging power modules pass through institute It states charging and discharging circuit module to connect with the constant flow module, the charge and discharge electrical circuit switching module is connect with battery；

The charge and discharge switching module includes first switch, second switch, third switch, the 4th switch and the 5th opens It closes,

The positive input terminal of the constant flow module is connect by the 4th switch with the anode of battery, and passes through third switch and electricity The cathode in pond connects；The cathode of the constant flow module is connect by second switch with the cathode of the charging power modules, and is led to It crosses the 5th switch to connect with the cathode of battery, the anode of the charging power modules is connected by the anode of first switch and battery It connects；

When battery is in constant-current charge state, the first switch, second switch and third are closed the switch, the 4th switch And the 5th switch disconnect；When battery is in constant-current discharge electricity condition, the first switch, second switch and third switch are disconnected It opens, the 4th switch and the 5th closes the switch.

Preferably, the constant flow module includes comparison circuit and metal-oxide-semiconductor a control circuit interconnected.

Preferably, the comparison circuit has a comparator, and the chip model of the comparator is 34072.

Preferably, the main control module is single-chip microcontroller main control module.

Compared with prior art, ageing device control circuit provided by the utility model has the advantage that

(1) true capacity and battery charging and discharging protection voltage of battery can accurately be tested out；

(2) power tube constant-current discharge will not cause shocking damage to battery；

(3) a set of metal-oxide-semiconductor is shared in charge and discharge process, can reduce probability of damage；

(4) it can be switched to suitable charging voltage when charging, battery protecting plate metal-oxide-semiconductor will not be punctured.

Detailed description of the invention

Fig. 1 is the circuit structure schematic block diagram of ageing device control circuit described in the utility model embodiment.

Fig. 2 is the particular circuit configurations schematic diagram of charge and discharge switching module described in the utility model embodiment.

Fig. 3 is the particular circuit configurations schematic diagram of constant flow module described in the utility model embodiment.

Specific embodiment

For the ease of the understanding of those skilled in the art, below in conjunction with the drawings and specific embodiments to the utility model make into One step detailed description.

As shown in Fig. 1, a kind of ageing device control circuit, including main control module, the charge power supply being connect with main control module Module, charging and discharging circuit switching module and constant flow module, charging power modules by the charging and discharging circuit module with it is described Constant flow module connection, the charge and discharge electrical circuit switching module are connect with battery.In the present embodiment, the main control module is monolithic Machine main control module.

As preferred embodiment, the charge and discharge switching module is as described in attached drawing 2 comprising first switch, second open It closes, third switchs, the 4th switch and the 5th switch, the positive input terminal of the constant flow module are passing through the 4th switch and battery just Pole connection, and switched by third and connect with the cathode of battery；The cathode of the constant flow module is filled by second switch with described The cathode of power supply module connects, and is connect by the 5th switch with the cathode of battery, and the anode of the charging power modules is logical The anode for crossing first switch and battery connects；When the first switch, second switch and third close the switch, the 4th switch with And when the 5th switch disconnection, a charging constant current loop is formed at this time, constant-current charge can be carried out to battery, battery is in perseverance at this time Current charge state；When the first switch, second switch and third switch disconnection, the 4th switch and the 5th are closed the switch When, an electric discharge constant current loop is formed at this time, can carry out constant-current discharge to battery, battery is in constant-current discharge electricity condition.

In a wherein preferred embodiment, the constant flow module includes a comparison circuit and MOS interconnected Pipe control circuit.The comparison circuit has a comparator, and (in the present embodiment, the chip model of the comparator is preferably 34072)；The metal-oxide-semiconductor control circuit has a metal-oxide-semiconductor, and the particular circuit configurations of the constant flow module are as shown in Fig. 3, This is no longer described in detail the particular circuit configurations of constant flow module.In this constant flow module, 3 feet of comparator 34072 are positive defeated Entering end signal input terminal, 2 feet are feedback voltage end, and 1 foot is output end, which is used to control the linear voltage of metal-oxide-semiconductor, with Constant flow module is set to reach a dynamic balance state, i.e. input voltage adjustable loop size of current, to realize that constant current is filled Electricity or constant-current discharge.

Using ageing device control circuit provided by the utility model, the true capacity and electricity of battery can be accurately tested out Pond charge and discharge protecting voltage, and can be switched to suitable charging voltage in charging, battery protecting plate metal-oxide-semiconductor will not be punctured；Together When also pass through the setting charge and discharge switching module and constant flow module and can have so that sharing a set of metal-oxide-semiconductor in charge and discharge process Effect reduces probability of damage, and carries out constant-current discharge to battery using power tube, will not cause shocking damage to battery.

Above-described embodiment is the preferable implementation of the utility model, is not the restriction to the utility model, not Be detached from the utility model inventive concept under the premise of, it is any it is obvious replacement the protection scope of the utility model it It is interior.