[introduction] reach device of smooth hot season and data center from electric car, motorboat, batteries power supply system is developing flourishingly. Current trend basically is to increase moving voltage of the system to be led with cut system dimension, weight or the usable meritorious service that add load. Below the ceaseless progress of parts of an apparatus of wide power input, at this tide forefront is the application that changes 24V from 12V.

All and electric car (EV) , include pure electric car (BEV) , the 12V lead acerbity cell that uses a convention will serve as the independent power source that enters system and warming system without the key, because be in advocate these systems when drawing batteries is extinct still should be run continuously. Besides, batteries still is Zhang Jin of safe gasbag system, safety belt implement with dashboard power supply, because if use different tension,still need new attestation, not only take time is wasteful also.

In ICE (internal-combustion engine) in the car, plumbic acerbity batteries also uses the motor that start. The batteries of light-duty autocycle and autocycle is 6 bend over, most car is 12 bend over, heavy-duty lorry is 24 bend over normally. The multiple that can discover these are 6V but this is not coincidence. The chemical kind that there is a lot of differring in the world of batteries (namely lithium of iron of ion of plumbic acid, lithium, phosphoric acid) , and the mainest unit is single cell, can have the voltage of float open a way inside 1-4V limits (nominal) . Accordingly, a lot of cell combination can produce taller voltage to call batteries series together (when be being combined with protective circuit especially) , but more Chang Jian calls cell. Series connection batteries can obtain needs output voltage, OK also and shunt-wound will increase output electric current.

The voltage of plumbic acerbity batteries is 2V, because this establishs ties,3 batteries will offer 6V, 6 batteries offer 12V, 12 batteries offer 24V. The plumbic acerbity batteries on car of for military use and plane uses 14 batteries to provide power source of 28V military standard. The voltage of lithium ion batteries is 2.4 to 3V, because these 6 groups of lithium are ionic,batteries can be portable electric drill and other workshop equipment to offer voltage of 18V model batteries.

Generally speaking, heavy-duty applying (big electric current) it is important to because weight comes without the price,use plumbic acerbity cell normally, and pay attention to charge quickly and light quantified application more material of chemistry of tendency lithium ion, but batteries is chemical (and wraparound store can) the likelihood is planted than this too simplifying explanation comes more delicately and ” changeful ” , because of the information that this suggests reference is more detailed, but from now on RECOM rich guest [1] begins.

Although batteries power supply uses the commonnest tension,be 6, 12 with 18V, but other spheres more and more will total line voltage is pushed up 24 with 48V. A will detailed introduction can see the backside reason of this kind of trend in all sorts of use case.

Since 12V batteries is commonner, why to continue to use?

The plumbic acerbity batteries of 12V compares 24V really or 48V is general, because this also compares voltage,taller replacement scheme is obtained. When electric machinery is started, heavy-duty batteries can provide hundreds electricity, but as a result of wiring harness carry stream ability is limited, the biggest continuously electric current is controlled in 100A by limitation, be in limitation of the greatest usable power then 1, 200W fluctuates.

If the equation place of lower part is shown, power and electric current and voltage become direct ratio, but with resistance path (for example electrical wiring) medium electric current shows exponential scale.

Watt of – of equation 1 is mensurable, among them P is power, I is electric current, v is voltage

– of equation 2 Ohm’s law, among them V is voltage, I is electric current, r is resistor

When watt law and Ohm’s law union are together, electric current becomes more apparent to the exponential effect of power comsumption. Before arriving at upright load, the resistor of electrical wiring can cause power comsumption and voltage drop.

Power loss of computation of – of equation 3, among them P is power, I is electric current, r is resistor

Can reach from which the following conclusion:

● Below the circumstance with changeless power, voltage can make doubly voltaic halve.

● The electric current that means voltaic halve the system to want an in part only handles ability, because this reduces conductor,dimension also can keep same power.

● same conductor medium voltaic halve can make the voltage drop halve of along the road, offer taller voltage to upright load thereby (improve systematic efficiency) .

● Voltaic halve can make conductor length double and keep same voltage drop.

● same conductor medium voltaic halve can let distribution network power comsumption have 1/4 only.

Although the world is getting lost electric car quickly, but internal-combustion engine car is in at least production is thrown continuously inside 20 years next, because this still was met later 2050,go up in big driveway, and in this during innovation can advance continuously. As dynamoelectric adjust, the development that gets used to the technology such as suspension oneself, the car will continue to be given priority to with the technology offer in order to come true below all road condition drive faultlessly experience. More complex air conditioning control, mechanical pump will by dynamoelectric with turbine supercharger is replaced, and instant idle fast open stop a system to wait, report of these extraordinary waste time and the power supply capacity that exceeds batteries of standard 12 V.

ICE with mixture motivation the 48V batteries system of electric car can provide 5kW power, but still be by classify safe and extra-low voltage (SELV) , the wiring of means tradition is isolated from and the safety of technician grooms enough reduces risk getting an electric shock (fall in most use circumstance, all volts d.c. under 60V can be regarded as ” safe ” ) . The vehicle of batteries power supply of large car and other form has very many electrical wiring possibly also and bring about gross weight to increase, but what should notice is electrical wiring weight euqally important to fuel car and electric car. The argument that uses tall tension occasionally is to be able to reduce cupreous dosage. What get on these weight and cost is economic, and those who use implementation of group of taller voltage batteries is economic add in, can be in abiding the change that spends respect happening to be being shown (no matter be,point to fuel or battery life) .

These elements are shown in the article the value in listed and actual applying advocates. No matter be to increase power dimension of processing, cut system, shift dimension of high-energy effect, contractible electrical wiring, support longer take a line, or it is the element such as dependability, taller total line voltage has quite large dominant position.

So do 24V or 48V batteries connect regular meeting application what to place be? The electromotor of different type is very good choice. Small-sized electric machinery, for example the hand uses wheelchair or cart of tool, fisher, golf, footplate car, often emphasize in the dimension of whole system and weight, as a result of mostly the weight that dispute connective props up batteries and relevant power parts of an apparatus or power supply cord accordingly can use up many batteries n. In another end, industrial electric machinery and system of electric machinery drive often are any industries the biggest customer of footmark of total the sources of energy [2] , because this is ambitious,of tone is there still is a lot of to improve space and the chance that increase energy efficiency in this domain.

Still have a variety of electrical system benefit from benefit from besides electric machinery tall voltage batteries. Smooth hot season (PV) is a very good example, because solar battery array is OK modular, can think like batteries array and application offer the energy with proper size to store. 24 or 48V can offer enough peak value power to be the hut between hill, out-of-the-way weather station or mobile phone from network plan base station power supply, at the same time sufficient batteries capacity is crucial system power supply several days when the cloudy day.

The phenomenon that a few kinds of afore-mentioned application confluence rises is commonner and commonner already. Larger ship not only the batteries voltage with taller benefit from benefit from, use PV to also can bring more profit. Same idea also applies to recreational car (RV) , as a result of COVID-19 epidemic situation, the sales volume of recreational car appeared breathtaking grow considerably. Use mix with the military affairs of batteries power source redundantly in great quantities high reliability application is changed into from 12V system 24 or the situation of 48V system will be more and more general. RECOM also offers the 48V batteries power supply that suits shipping application to communicate inverter, can produce three-phase 115VAC, output power is 1, 200VA.

Should be sensitive electronic equipment or radio emitter power supply when batteries when, the regulated power supply that whether can provide stability becomes very important. Voltage regulator must efficient use memory energy with utmost favourable geographical position, the difference of the battery that also should have wider input voltage range to fill report in order to answer and the batteries that discharge completely, and be below a lot of circumstances, need has the output that electric current keeps apart to be disturbed in order to avoid road of ground connection annulus, or protective equipment avoids the inductive voltage transient that suffers surge of laden light voltage and be struck by lightning or exterior report magnetic field to cause to affect. Generally speaking, expose in the environment more, requires segregation order and degree is about to jump over tall.

The applied range with wider = of wider input voltage limits

RECOM offers a variety of low cost for board class power source, exceed diminutive to be not segregation manostat to be like RPM and RPX series, suit to have wide input particularly extremely voltage limits, efficient and super- low bide one’s time the equipment of batteries power supply of power comsumption. RECOM also carries sacrificial vessel to have 4:1Input the segregation DC/DC converter of voltage limits, apply to system of 12 / 24V (36V of 9 –) or system of 24 / 48V (75V of 18 –) . If need global solution, RPA150E series uses 1/8 brick to enclose, in the input of 9-60VDC voltage limits offers 150W stabilized voltage to keep apart output, cover 12 / 18 / 24 and voltage of 48V batteries group. It is to keep apart DC/DC converter to contain in-house and planar transformer, still can regard as so 24V or manostat of 48V bus line, no matter input voltage taller than output, lower same perhaps, can offer constant voltage and prevent short circuit output.

The union of power parts of an apparatus with taller total line voltage and rich function rises the application that can invite more and different sort further is benefited. Computational application also can enjoy afore-mentioned advantage (join and blame join all are, namely data center and notebook computer) . E.g. , computer server may extinct reserve the n of batteries, because this faces a Gao Heng that won’t drop forever to decide load, energy memory stands by laden position more (no matter be physics or tension level) be optimized to the design and reduce energy OPEX more advantageous, because OPEX is an influence normally,data center always has cost (the reason of TCO) . This can pass through systematic front reserve batteries is unit (BBU) comes true, beardless changeover time with store can the form is supplied for load reserve importantly power source.

Conclusion

The way that 12V batteries offerred no less than to lead to 24V solution is same, 24V batteries also can be 48V open up a road. Generally speaking, should meet batteries conformity in the batteries group of taller voltage reduce the expense that pack and increase value position only; And 24V batteries as it happens manages the optimal position between 12V and 48V bus line now.

Be like public electrified wire netting same, gain is scored in the distribution voltage that all large systems can be being pushed higher ceaselessly almost.

Document

[1] RECOM, “What Is Energy Storage? ” RECOM Blog, nov 4, 2022, https://recom-power.com/en/rec-n-what-is-energy-storage- – 233.html

[2] IEA, “Motor-driven System Electricity Use As A Share Of Electricity Use By Industry Subsector, ” IEA, paris, https://www.iea.org/data-and-statistics/charts/motor-driven-system-electricity-use-as-a-share-of-electricity-use-by-industry-subsector (accessed January 3, 2023) .

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