CN201069808Y

CN201069808Y - Charging battery

Info

Publication number: CN201069808Y
Application number: CNU2007201435237U
Authority: CN
Inventors: 李桐进
Original assignee: WEILI ENERGY CO Ltd
Current assignee: WEILI ENERGY CO Ltd
Priority date: 2007-04-10
Filing date: 2007-04-10
Publication date: 2008-06-04
Anticipated expiration: 2017-04-10

Abstract

The utility model discloses a chargeable battery, which comprises a control circuit board and a battery body, which are arranged inside the battery shell. The control circuit board is mutually connected with the battery body. The battery body is internally arranged with a battery diaphragm, a plurality of polar plates and electrolyte; wherein, the polar plates are coated with active materials to form the lithium-ion or lithium-polymer chargeable battery. The control circuit board can provide the charge protection, discharge protection and short-circuit protection for the battery body. When the battery body is under the state of charging and the voltage excessively rises due to the over long time charge, the control circuit board protects the battery body according to the overcharge protection detection voltage. When the battery is under the state of discharging and the voltage excessively decreases due to the over long time discharge, the control circuit board protects the battery body according to the overdischarge protection detection voltage. When the battery body is under the short circuit state, the control circuit board then protects the battery body by the execution of the short-circuit protection.

Description

Rechargeable battery

Technical field

The utility model relates to a kind of rechargeable battery, particularly about a kind of 9 volts of rechargeable batteries with control circuit board.

Background technology

Battery is unique energy source of portable electronic product, and conditions such as volume of battery, weight, life-span length and fail safe are bigger with the performance influence to the function of portable electronic product.Chemical cell is divided into primary cell and secondary cell.The characteristic of primary cell is and can not charges that after the inner stored power consumption of primary cell finished, primary cell just can't provide electric energy again.The characteristic of secondary cell is chargeable, improves the life-span that battery uses, and secondary cell is widely used in portable electronic product such as mobile phone, mobile computer, digital camera, PDA, walkman etc.Because primary cell does not have the problem in the charging, thereby can not blast because of overcharging, yet secondary cell needs to be provided with overcharge protection circuit because of the charging problem on charger.

9 volts of rechargeable batteries in the past, Ni-MH battery inside is to be made of hard metal shell, the danger of easily blasting.And 9 voltaic element have energy density low, the defective that capacitance is too small.

Fig. 1 is the perspective view of original technology.Please refer to Fig. 1, Ni-MH battery 1 in the past comprises electric stamen 3, battery case 4, metal iron plate 2.Ni-MH battery is to be anodal with the nickel hydroxide, and hydrogen bearing alloy is a negative pole, and potassium hydroxide is electrolyte.The fail safe of 9 volts of nickel-hydrogen chargeable cells is not as good as alkaline battery, and 9 volts of nickel-hydrogen chargeable cell battery cases partly adopt hard metal alloy, and the hidden danger on the explosion safety is arranged.

For improving 9 volts of rechargeable batteries in the past; the utility model provides a kind of 9 volts of rechargeable batteries; can prevent blast; battery self-protection is provided; improve battery power output, capacitance, reduced volume, cycle life, improved fail safe simultaneously, improve because of battery charge and cross the hot problem of charger of a specified duration.

The utility model content

Main purpose of the present utility model provides a kind of rechargeable battery; it is that control circuit board is set in rechargeable battery; the state of control circuit board may command battery when charging, discharge, short circuit; control circuit board was implemented over-charge protective to battery when battery charge was excessive; control circuit board implemented to put protection to battery when battery discharge was excessive; control circuit board is implemented short-circuit protection to battery during battery short circuit, and control circuit board may command cell voltage maintains between 5 volts to 9 volts.

Another purpose of the present utility model provides a kind of rechargeable battery, and it is to select for use aluminium foil as battery body, can increase fail safe, prevents battery explosion.

The utility model gets again that a purpose provides a kind of rechargeable battery, and it can improve the power output of battery, increases capacitance, and reduced volume prolongs cycle life, and improves because of battery charge and cross the hot problem of charger of a specified duration.

For reaching above-mentioned purpose, rechargeable battery of the present utility model is to comprise battery case, is provided with control circuit board and battery body in the battery case, and adopts aluminium foil as battery body, increases fail safe, prevents battery explosion.The battery body over-charge protective is provided, crosses and put protection, short-circuit protection by control circuit board; the control cell voltage maintains between 5 volts to 9 volts; because control circuit board is located in the battery; can improve the power output of battery; increase capacitance; reduced volume prolongs cycle life, and improvement is crossed the hot problem of charger of a specified duration because of battery charge.

Description of drawings

Fig. 1 is the stereochemical structure exploded view of original technology.

Fig. 2 is a stereochemical structure exploded view of the present utility model.

Fig. 3 is a perspective view of the present utility model.

Fig. 4 is the schematic diagram that control circuit board of the present utility model combines with battery body.

Fig. 5 is the enforcement calcspar that battery body combines with control circuit board.

Fig. 6 is the circuit diagram of control circuit board.

Fig. 7 is that 9 volts of nickel-hydrogen chargeable cells and 9 volts of lithium rechargeable batteries are in the datagram of various charging and discharging currents.

Fig. 8 is 9 volts of alkaline batteries respectively at per hour 360 milliamperes and 720 milliamperes and 9 volts of lithium rechargeable batteries datagrams relatively.

The figure number explanation

1 alkaline battery

2 metal iron plates

3 electric stamens

4 battery cases

109 volts of rechargeable batteries

12 battery cases

122 control circuit boards

123 battery bodies

124 fillers

125 nickel sheets

126 electric wires

127 integrated circuits

128 electric stamens

129 1 groups of field-effect transistors

14 load devices

16 chargers

Embodiment

Fig. 2 is a stereochemical structure exploded view of the present utility model.Fig. 3 is a perspective view of the present utility model.

Please be simultaneously with reference to Fig. 2, Fig. 3.

Present embodiment is to select for use 9 volts of rechargeable batteries 10 to do explanation.Battery case 12, battery body 123 and control circuit board 122 are arranged in 9 volts of rechargeable batteries 10, also have filler 124, electric wire 126, nickel sheet 125, electric stamen 128 in addition.Battery case 12 is a hollow housing, be divided into first part and second partly, but electricity stamen 128 is to be positioned at external load or charging in battery case 12 firsts, the instrument of charging is that used charger of general nickel-hydrogen chargeable cell or the used charger of Ni-Cd nickel-cadmium get final product, common load then is a portable electronic product, as mobile phone, notebook, digital camera, PDA, walkman etc.All the other all are to be positioned at battery case 12 as battery body 123, control circuit board 122, filler 124, electric wire 126, nickel sheet 125, electric stamen 128.Filler 124 is fixed on battery body 123 and control circuit board 122 and prevents battery body 123 and control circuit board 122 vibrations in the battery case 12.Be provided with two battery bodies 123 in the present embodiment in the battery body 123 and connect mutually, utilize plural nickel sheet 125 to interconnect with control circuit board 122 again.Control circuit board 122 utilizes plural electric wire 126 to be connected with electric stamen 128.Though be to explain, but also can utilize the battery body of various numbers to provide power supply to finish the present invention with two battery bodies.As providing power supply with the battery body number for 4, the mode of mutually combining changes to connection in series-parallel between battery body.

Battery body 123 inner pole plate and the electrolyte that comprise battery isolating film, plural sheet of forming.The pole plate of isolating battery body 123 and plural sheet by battery isolating film.Pole plate comprises positive plate and negative plate, scribble active material on positive plate and the negative plate, as graphitized carbon, alloy material, lithium cobalt, lithium nickel, lithium manganese, lithium nickel cobalt etc., by these active materials and electrolyte to reach the electric energy of high-energy-density, as 9 volt lithium ion rechargeable batteries, 9 volts of lithium macromolecule rechargeable batteries.The material of battery body 123 is selected aluminium foil for use, does not use hard metal as battery body, so can avoid the generation of exploding, and increases fail safe.

Fig. 4 is the schematic diagram that control circuit board of the present utility model combines with battery body.Please be for being described in more detail the utility model simultaneously with reference to Fig. 2, Fig. 3 and Fig. 4.Control circuit board 122 in the battery case 12 utilizes plural nickel sheet 125 to combine with battery body 123 and finishes, and control circuit board 122 is made up of complex capacitance, complex impedance, two field-effect transistors and an integrated circuit.Control circuit board 127 has over-charge protective, crosses the effect of putting protection and short-circuit protection.

The state of control circuit board 127 may command battery bodies 123 when charging, discharge, short circuit.When the electric energy in the battery body 123 was crossed when of a specified duration and overcharged because of the charging interval; 127 pairs of battery bodies of control circuit board 123 are implemented over-charge protective; it is to be set at 4.15～4.40 volts to protect each battery body 5 respectively to each battery body 5 that over-charge protective detects voltage; 123 chargings surmount over-charge protective detection voltage to battery body, and battery body 123 will stop charging and carry out over-charge protective.When the electric energy in the battery body 123 discharges for a long time when excessive because of crossing discharge time; 127 pairs of battery bodies 123 of control circuit board implemented to put protection; cross put protection detect voltage to each battery body 123 be 2.30 ± 0.1 volts to protect each battery body 123 respectively; discharge surmounted and puts protection and detect voltage to battery body 123, and battery body 123 will stop discharge and carry out putting protection.When the electric energy in the battery body 123 during because of the external load short circuit, 127 pairs of battery bodies of control circuit board 123 are implemented short-circuit protections, and control circuit board 127 is implemented about 10 milliseconds of the time of short-circuit protections.Control circuit board 127 and may command battery body 123 voltages maintain between 5 volts to 9 volts.

Control circuit board 127 is when normal operation, and the consumable electric current of itself is lower than 20 micromicroamperes, and conducting internal resistance itself is lower than 80 milliohms, and the electric current during operate as normal own is 0～2 ampere.When control circuit board 127 during in normal operation, electric current arrives 4～6 amperes and itself then takes overcurrent protection to reduce electric current.

Fig. 5 is the enforcement calcspar that battery body combines with control circuit board.Fig. 6 is the circuit diagram of control circuit board.Please be for being described in more detail the utility model simultaneously with reference to Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6.

Control circuit board 122 is to comprise integrated circuit 127 and one group of field-effect transistor 129.Integrated circuit 127 and battery body 123, one group of field-effect transistor 129 are connected, battery body 123 1 ends link to each other with the positive pole of load device 14/ charger 16, battery body 123 other ends are connected with one group of field-effect transistor 129 1 end, one group of field-effect transistor 129 other end then links to each other with the negative pole of load device/charger, makes battery body 123 can form the loop of a load/charging with load device 14/ charger 16.The short circuit that cooperates the discharge of controlling battery body 123, charging, protection to cause because of load or charging with one group of field-effect transistor 129 by integrated circuit 127 when battery body.Control circuit board 127 has over-charge protective, crosses the effect of putting protection and short-circuit protection.

Table one is the tabulations of 9 volts of lithium rechargeable batteries with respect to 9 volts of Ni-MH battery characteristics, does explanation especially at this.

Table one

Battery variety	9 volts of Ni-MH batteries	9 volts of lithium rechargeable batteries
Battery variety	9 volts of Ni-MH batteries	9 volts of lithium rechargeable batteries	Energy density	Energy density is low	Energy density height (3～4 times of about Ni-MH batteries)
Capacitance	Little 160～180 Milliampere Hours of capacitance	High 160～500 Milliampere Hours of capacitance (2～3 times of traditional approximately rechargeable batteries)	Energy density	Energy density is low	Energy density height (3～4 times of about Ni-MH batteries)
Capacitance	Little 160～180 Milliampere Hours of capacitance		Power shell	Battery body is that hard metal is easily blasted	Battery body is that aluminium foil does not have explosion hazard
Protective circuit	There is not protective circuit	Having control circuit board provides over-charge protective, crosses and put protection, short-circuit protection	Power shell	Battery body is that hard metal is easily blasted
Protective circuit	There is not protective circuit		Battery charge	Battery can produce high heat, hot when overcharging	Battery can not produce high heat, hot when overcharging
Discharging current	Has only low discharging current during discharge	Tool high-output power ability provides heavy-current discharge from 144 milliwatts～14.4 watt	Battery charge	Battery can produce high heat, hot when overcharging	Battery can not produce high heat, hot when overcharging
Discharging current	Has only low discharging current during discharge		Volume and weight relationships	Weight 3A volume B	Weight A, volume B (if same volume, 9 volts of lithium rechargeable batteries weight be 9 volts of Ni-MH batteries 1/3)

Fig. 7 is that 9 volts of nickel-hydrogen chargeable cells and 9 volts of lithium rechargeable batteries are in the datagram of various charging and discharging currents.Fig. 8 is 9 volts of alkaline batteries respectively at per hour 360 milliamperes and 720 milliamperes and 9 volts of lithium rechargeable batteries datagrams relatively.Label 1 among Fig. 8 is represented alkaline battery 360 milliamperes, and label 2 is represented alkaline battery 720 milliamperes, and label 3 is represented lithium macromolecule battery 360 milliamperes, and label 4 is represented lithium macromolecule battery 720 milliamperes.360 milliampere alkaline batteries are discharge time: 31.8S, 720 milliampere alkaline batteries are discharge time: 5.5S, 360 milliampere lithium macromolecule batteries are discharge time: 59.2S, 720 milliampere lithium macromolecule batteries are discharge time, and: 21.3S. please be simultaneously with reference to Fig. 7 and Fig. 8, with the difference between 9 volts of alkaline batteries of clear interpretation more and the 9 volts of lithium rechargeable batteries.

In Fig. 7 and Fig. 7, can very clearly find, 9 volts of lithium rechargeable batteries are for 9 volts of alkaline batteries or 9 volts of nickel-hydrogen chargeable cells, at these 9 volts of lithium rechargeable batteries selecting for use are 9 volts of lithium macromolecule rechargeable batteries, under the same conditions, 9 volts of lithium macromolecule rechargeable batteries the performance of charging, discharge than 9 volts of alkaline batteries or 9 volts of nickel-hydrogen chargeable cells come good, all longer as capacitance, energy density, discharge time than height or time that 9 volts of alkaline batteries or 9 volts of nickel-hydrogen chargeable cells come.

9 volts of lithium rechargeable batteries 10 itself comprise control circuit board 6, Gu the protective circuit that need not be dependent on the general charger 16 is protected 9 voltaic elements itself.Can make 9 volts of lithium rechargeable batteries 10 can not produce overdischarge, overcharge by control circuit board, and when charger 16 chargings, also can not make 1 generation of 9 volts of lithium rechargeable batteries own high hot, hot with the same in the past.9 volts of lithium rechargeable batteries 10 cycle lives are more than 2000 times.

The above is preferred embodiment of the present utility model only, is not to be used for limiting the scope that the utility model is implemented.Any those skilled in the art can think variation all should fall into protection scope of the present invention.

Claims

1. a rechargeable battery is characterized in that: comprise

One battery case;

One battery body comprises a battery isolating film, is provided with the pole plate and the electrolyte of a plurality of sheets in the described battery isolating film;

One control circuit board, being positioned at described battery case is connected with described battery body, the state of the described battery body of described control circuit board may command when charging, discharge, short circuit, when described battery body was overcharged, described control circuit board was implemented over-charge protective to described battery body; Described battery body discharges when excessive, and described control circuit board implemented to put protection to described battery body; During described battery body short circuit, described control circuit board is implemented short-circuit protection to described battery body, and the described battery body voltage of described control circuit board may command maintains between 5 volts to 9 volts.

2. rechargeable battery as claimed in claim 1, wherein said battery body are at least one lithium batteries.

3. rechargeable battery as claimed in claim 1, wherein said lithium battery are that lithium ion battery or the mutual connection in series-parallel of at least two lithium macromolecule batteries are formed by at least two lithium batteries.