The manufacture method of large-capacity power type lithium ion battery pack
Technical field
The present invention is meant a kind of manufacture method of large-capacity power type lithium ion battery pack especially about a kind of manufacture method of lithium ion battery group.
Background technology
Lithium ion battery be last century the nineties develop and begin to realize commercial, its appearance deserve to be called secondary cell historical once the leap, subsequently ten surplus year in, its commercialization process has obtained the development of advancing by leaps and bounds.The range of application of lithium ion battery also thereby is constantly widened, and to energy traffic, under water, lithium ion battery has entered the every field of human society from space from information industry.
Lithium ion battery is divided into primary cell and secondary cell two classes, the non-rechargeabel disposable lithium-battery of main use in the lower electronic product of power consumption such as camera then uses the secondary lithium battery that can discharge and recharge in the bigger electronic product of power consumption such as video camera, digital camera, mobile phone and notebook computer.Compare with other storage batterys, the advantage of lithium ion battery is voltage height, high-energy-density, self-discharge rate is low, the life-span is long.Not having memory effect also is the dark outstanding advantage popular to people of lithium ion battery, is that other secondary cell is not available, and whether the electric weight that people needn't take into account before lithium ion cell charging wherein runs out.
Lithium ion battery is made up of positive pole, negative pole, electrolyte, barrier film and five parts of container, wherein most importantly positive pole, negative pole and three parts of electrolyte.No matter at both positive and negative polarity or in battery diaphragm, lithium all exists with ionic species in kalium ion battery.The negative pole of lithium ion battery is a carbon materials, and is anodal then be the transition metal oxide that contains lithium as graphite etc., as LiCoO2, LiMn2O4 etc.Electrolyte is the organic solution that contains lithium salts.Lithium ion battery work (charge or discharge) process in, lithium ion directed movement in both positive and negative polarity and electrolyte membrance.During charging, potassium ion is deviate from from positive electrode under the driving of electric field, through electrolyte, is inserted in the negative pole.During discharge, process is just in time opposite, and promptly lithium ion returns in the positive pole, and electronics has then passed through in the electronic product of electricity consumption and power supply for it.
At present, lithium ion battery is widely used in the vehicle, i.e. power lithium-ion battery.For power lithium-ion battery a basic requirement being arranged is exactly that capacity is wanted height, could powered vehicle drive to certain distance like this, can satisfy certain trip needs.Therefore, the monomer of current driving force lithium ion battery is done bigger and bigger, and this not only makes the cost height, and security reliability is low.
Therefore, need a kind of easy manufacturing and the high large-capacity power type lithium ion battery of dependability.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of manufacture method of large-capacity power type lithium ion battery pack, it will be by being easy to make and stable minor comonomer makes up, form the large-capacity power type lithium ion battery pack, to satisfy power-type lithium ion battery high voltage and jumbo requirement, thereby be convenient to make, cost is low, and security reliability is good.
For being implemented in above-mentioned purpose, the invention provides a kind of manufacture method of large-capacity power type lithium ion battery pack, comprise the steps: step 1, cell is provided; Step 2, several cells in parallel are formed a battery unit module; Step 3, several battery unit modules of connecting are formed a battery time composite module; Step 4, several batteries time composite module in parallel are formed a battery pack.
The manufacture method of large-capacity power type lithium ion battery pack of the present invention will be by being easy to make and stable minor comonomer battery makes up, form the large-capacity power type lithium ion battery pack, to satisfy power-type lithium ion battery high voltage and jumbo requirement, thereby be convenient to make, cost is low, and good reliability.
In order further to understand feature of the present invention and technology contents, see also following about detailed description of the present invention and accompanying drawing, yet appended graphic only provide with reference to and the explanation usefulness, be not to be used for the present invention is limited.
Brief description of drawings
Below in conjunction with accompanying drawing,, will make technical scheme of the present invention and other beneficial effects apparent by the specific embodiment of the present invention is described in detail.
In the accompanying drawing,
Fig. 1 is the flow chart of the manufacture method of large-capacity power type lithium ion battery pack of the present invention.
Embodiment
For further setting forth technological means and the effect that the present invention takes for the predetermined purpose of realization, see also following about detailed description of the present invention and accompanying drawing, believe purpose of the present invention, feature and characteristics, should obtain thus going deep into and concrete understanding, yet accompanying drawing only provides reference and explanation usefulness, is not to be used for the present invention is limited.
Consult Fig. 1, the manufacture method of large-capacity power type lithium ion battery pack of the present invention comprises the steps: 1, cell is provided; 2, several cells in parallel are formed a battery unit module; 3, several battery unit modules of connecting are formed a battery time composite module; 4, several batteries time composite module in parallel is formed a battery pack.
The cell of described step 1 can be the cell of the existing low capacity that is easy to make, such as the 10Ah cell, and all be provided with PTC resistor (PTC), and the cell polymer Li-ion battery, flexible packing lithium ion battery, box hat or aluminum hull lithium ion battery or the cylindrical lithium ion battery that adopt tertiary cathode material or LiMn2O4, the above preferred 40 micron thickness power-type lithium ion battery barrier films of 25 micron thickness and the anti-overcharge electrolyte of safety-type to make at each cell.
In this step 2, at first cell is carried out vibration processing, under 45 ℃ hot environment, carry out 48 hours burin-in process then, investigate the voltage drop of cell then, qualified cell is carried out combo and is unified into required battery unit module.
In the described step 3, at first the battery unit module is carried out the charge and discharge cycles in a week, the voltage when the battery unit module is charged to combination was shelved 48 hours then, qualified battery unit module is carried out combo be connected into required high-voltage battery time composite module.
In the described step 4, the afflux row of battery time composite module by metal preferably copper, copper alloy, nickel or nickel alloy carried out and be unified into battery pack,, also can not influence the work of integral battery door group if there is the inferior composite module of a battery to go wrong like this.
The present invention realizes grouping management to cell, and anabolic process all adopts spot welding to connect, and connects without scolding tin, does not contact thermal source, can not damage battery like this.
The present invention also comprises step 32, is connected with protective circuit at the output of each battery unit module, and it can prevent that electric current is excessive, prevent to overcharge, prevents overdischarge and prevent that temperature is too high.
The present invention also comprises step 34, is connected with the battery management control circuit at the output of each battery unit module, when certain battery unit module has problem, just having the indication of reporting to the police, and reminds operating personnel.
The present invention also comprises step 42, is connected with protective circuit at the output of each battery time composite module, and it can prevent that electric current is excessive, prevent to overcharge, prevents overdischarge and prevent that temperature is too high.
The present invention also comprises step 44, is connected with the battery management control circuit at the output of each battery time composite module, when certain battery time composite module has problem, just have the indication of reporting to the police, remind operating personnel, turn-off the connection of this group simultaneously, do not influence the work of integral battery door group.
The present invention also comprises step 5, and battery pack is carried out three anti-processing, so can be because of not shelving the destruction of causing battery for a long time.
In sum, the manufacture method of large-capacity power type lithium ion battery pack of the present invention will be by being easy to make and stable minor comonomer battery makes up, form the large-capacity power type lithium ion battery pack, to satisfy power-type lithium ion battery high voltage and jumbo requirement, thereby be convenient to make, cost is low, and good reliability.
The above; for the person of ordinary skill of the art; can make other various corresponding changes and distortion according to technical scheme of the present invention and technical conceive, and all these changes and distortion all should belong to the protection range of accompanying Claim of the present invention.