m******h
发帖数: 5753 | 1 启动2-cycle engine， 该用crank battery，deep cycle， 还是 hybrid？
原配电池， deep cycle的，发现电压上不去， 不大到12v， 启动困难， 用我原来
trolling motor 的deep cycle， 刚充满后, 电压 略高于 12v， 启动很容易，
但放几天后又不行了， | m******h
发帖数: 5753 | 2 找到答案了
Boat Battery Buying Guide
written by Keith Sutton
Confused about marine batteries? This guide will help you sort through the
different types and choose the ideal battery for the task at hand.
Marine Battery Buying Guide
Understanding the different types of marine batteries available and their
applications will help you select the right battery to power your rig.
Selecting a new 12-volt marine battery for your boat can be a daunting task
for first-time buyers. Many types are available, each with a different
purpose, and each with various advantages and disadvantages. With this handy
buyer's guide, however, you'll have easily understandable information at
your fingertips so you can choose a battery ideal for the tasks at hand.
Basic Battery Types
There are two basic types of 12-volt batteries: 1) cranking, or starting,
batteries, which are designed to start your main engine, and 2) deep-cycle
batteries, which are used to power electrical accessories such as trolling
motors, fish-finders and radios. Dual-purpose batteries that can perform
both these functions to some extent also are available.
Cranking Batteries
Engine cranking requires lots of power in a short burst. A battery with more
surface area on the lead plates inside it delivers more fast power than one
with less plate surface. For this reason, cranking batteries are made with
thinner, more numerous lead plates. When the engine is running, the battery
is quickly replenished by the alternator.
The marine cranking amp (MCA), or just cranking amp (CA), rating found on a
battery's label measures a battery's starting power. And if you're using a
newer model outboard with sophisticated computers, pumps and sensors that
don't take kindly to being underpowered, you certainly don't want to scrimp
on starting power. Check your engine's manual for its recommended MCA/CA
rating before shopping for a battery, and always choose a battery with a
rating equal to or greater than the recommended value.
Deep-Cycle Batteries
Trolling motors and other accessories sip power at a slower rate for
extended periods. Batteries that power them usually aren't recharged until
the end of the day. These deep discharges are hard on battery plates, so
deep-cycle batteries have fewer yet thicker lead plates than cranking
batteries and are built to withstand deep cycling.
A deep-cycle battery's reserve capacity (RC) rating indicates how long it
can carry a specific load before falling into the dead zone. The higher the
RC number, the longer the battery will power your accessories. Remember this
when choosing a battery. Typically, a deep-cycle battery will have two or
three times the RC of a cranking battery. A deep-cycle battery also can
withstand several hundred discharge/recharge cycles, while a cranking
battery is not designed to be totally discharged.
No Substitutions
The key thing to remember when purchasing cranking and deep-cycle battery
types is not to substitute one for the other. If you use a cranking battery
to power your trolling motor, for instance, the battery will soon overheat
and fail, leaving you without power and requiring you to buy a new battery.
A deep-cycle battery substituted for a cranking battery, on the other hand,
may not provide the power needed to start your outboard. You could get
stranded with an engine that won't run. The inherent design strengths of
each battery type also are their weaknesses in opposite applications.
Dual-Purpose Batteries
It's usually best to install separate cranking and deep-cycle batteries. If
your boat is small, however, and there's only room for one battery due to
space or weight restrictions, consider buying a dual-purpose marine battery
specially that handles starting and cycling. Bear in mind, however, most
dual-purpose batteries won't start an engine quite as well as a true
cranking battery and won't endure as many deep discharge/recharge cycles as
a dedicated deep-cycle model.
Wet Cell, Gel or AGM?
Batteries can be further categorized as wet cell, gel or AGM (absorbed glass
mat), depending on the configuration of the electrolyte, or conducting
medium, inside the battery. Each type has pros and cons you should know
before making a purchase.
Wet-Cell Batteries
The traditional lead-acid batteries we all are familiar with are wet-cell or
"flooded-cell" batteries. Each wet-cell battery contains a liquid mixture
of sulfuric acid and distilled water (usually referred to as "battery acid")
. This is the most popular battery type, primarily because the price is
generally less than other types, but also because these batteries have a
number of inherent advantages. For example, a properly charged and
maintained, premium wet-cell battery is capable of as many as 1,000
discharge/recharge cycles. This can translate to many years of dependable
service at an initial cost substantially less than comparable capacity gel
or AGM batteries. Wet-cell batteries also are less likely to be damaged by
overcharging and tend to weigh less than comparable gel or AGM batteries.
One disadvantage of wet-cell batteries is the fact that most have vented,
interior accessible designs. This requires they be regularly inspected and
the cells topped off with distilled water. Venting also releases hydrogen
gas, which means the battery compartment must be well ventilated. Other
drawbacks include possible spilling of corrosive battery acid, a higher rate
of self-discharge (6% to 7% per month) and the fact that wet-cell batteries
are more fragile in high-vibration environments such as boats.
AGM Batteries
AGM batteries feature a dense filling of absorbent glass matting packed
tightly between the battery's plates. The matting is saturated with acid
electrolyte. This allows oxygen to recombine with hydrogen gas to replenish
the battery's water content and alleviate the need for refilling. No
maintenance is required, except periodic external cleaning. And because
these batteries are sealed, acid inside cannot spill and flammable gases
aren't released. AGM batteries also can be installed at any angle. They are
shock and vibration resistant, submersible without damage unlike wet-cell
batteries, and have a low self-discharge rate (around 3% per month at 77
degrees F). Primarily drawbacks are higher initial cost, greater weight than
comparable wet-cell batteries and the fact water cannot be replaced if the
battery is accidentally overcharged.
Gel Batteries
Gel batteries are filled with liquid electrolyte that is gelled with
silicates before the battery is sealed. Like AGM batteries, they use
recombinant technology that eliminates the need for adding water. They are
maintenance free, sealed, low-temperature tolerant, shock/vibration
resistant and have long cycle life. Their most notable advantage is
resistance to over-discharge that can damage other battery types. Gels have
an internal self-discharge rate less than 1 percent per month, so they can
be stored for long periods without being recharged. And because they aren't
prone to develop life-shortening plate sulfation when left uncharged, they
are a good choice for boaters who often forget to recharge batteries
promptly after use.
Gel batteries show their dark side when it comes to price and recharging.
They generally cost more than other battery types with the same RC and MCA
ratings. Most manufacturers recommend charging them to at least 13.8 volts,
but no more than 14.1 volts. Standard marine battery chargers routinely
reach higher voltages, so chargers designed to include gel batteries or
those with a gel setting must be used.
In Conclusion
Understanding the differences between the various types of batteries, and
the pros and cons of each, should no doubt prove useful when you're trying
to decide which battery will work best to crank your boat and power all your
accessories. Making the right choice eliminates many worries when you are
on the water, allowing you to concentrate on the most important reason you
bought your boat in the first place -- having fun.
【在 m******h 的大作中提到】
: 启动2-cycle engine， 该用crank battery，deep cycle， 还是 hybrid？
: 原配电池， deep cycle的，发现电压上不去， 不大到12v， 启动困难， 用我原来
: trolling motor 的deep cycle， 刚充满后, 电压 略高于 12v， 启动很容易，
: 但放几天后又不行了，
| N*********r
发帖数: 1190 | 3 电池老了吧。不管deep cyle还是starting, 充满电都应该是12.7V.
启动motor的时候电压drop到9-10伏都正常。但是没有load,应该保持12.6-12.7V
空间多就两块电池分别starting, deepcycle,只想用一块就用deepcycle,启动没问题，
也不怎么伤电池，motor的启动电流还不到100A
但是electri trolling motor的电池最好和这些启动啊，灯啊，电子设备啊，都分开。 | W*******s
发帖数: 18705 | 4 Who put deep cycle for cranking? 买的时候被忽悠了。。 | m******h
发帖数: 5753 | 5 很可能电池老了， 电池格子里可以放两块， 多放两块电池是好主意
可不可以并联？是电流重要， 还是电压？
【在 N*********r 的大作中提到】
: 电池老了吧。不管deep cyle还是starting, 充满电都应该是12.7V.
: 启动motor的时候电压drop到9-10伏都正常。但是没有load,应该保持12.6-12.7V
: 空间多就两块电池分别starting, deepcycle,只想用一块就用deepcycle,启动没问题，
: 也不怎么伤电池，motor的启动电流还不到100A
: 但是electri trolling motor的电池最好和这些启动啊，灯啊，电子设备啊，都分开。
| m******h
发帖数: 5753 | 6 当时有些奇怪，但人家一直这么用的，
我新手，被忽悠只好认了，
【在 W*******s 的大作中提到】
: Who put deep cycle for cranking? 买的时候被忽悠了。。
| N*********r
发帖数: 1190 | 7 deep cyle可以兼顾启动，照明，音响，fishfinder,在只打算用一个电池的情况下，比
只用个starting battery要蓄电多，而且电池寿命很长，因为很少deep discharge
【在 m******h 的大作中提到】
: 当时有些奇怪，但人家一直这么用的，
: 我新手，被忽悠只好认了，
| m**o
发帖数: 9137 | 8 同意.
【在 N*********r 的大作中提到】
: deep cyle可以兼顾启动，照明，音响，fishfinder,在只打算用一个电池的情况下，比
: 只用个starting battery要蓄电多，而且电池寿命很长，因为很少deep discharge
| m******h
发帖数: 5753 | 9 俩deep cycle 并联，是否可以提供足够的电流，又持久？ | W*******s
发帖数: 18705 | 10 别管别人说什么，做什么，Cranking battery 就是点火用的。Deep Cycle就是TM用的
。至于可以混用否,Maybe，但是不专业。不要并联，点火专用一个，其它绑另一个上。
去AutoParts买一个大功率的CrankingBattery，一百多块，问题就解决了。不知道你船
是在外面还是车库，我一直用On-Board Charger充电的，Never Unplug，这对电池寿命
有好处。 | | | s*****o
发帖数: 557 | 11 麻老大把船长证考出来了？俺只用过deep cycle，纯顶。
【在 m******h 的大作中提到】
: 启动2-cycle engine， 该用crank battery，deep cycle， 还是 hybrid？
: 原配电池， deep cycle的，发现电压上不去， 不大到12v， 启动困难， 用我原来
: trolling motor 的deep cycle， 刚充满后, 电压 略高于 12v， 启动很容易，
: 但放几天后又不行了，
| W*******s
发帖数: 18705 | 12 我忘了是多少尺，反正淡水的船24尺以下的不需要考证。
【在 s*****o 的大作中提到】
: 麻老大把船长证考出来了？俺只用过deep cycle，纯顶。
| m******h
发帖数: 5753 | 13 威力说的对， MA 不需要驾照， 而且不是comercial 的， 就更不需要了，比你那里有
人味， 哈哈哈
刚才试了一下并联， 今天比较冷，40 度，没有效果， 喷了点starter， 一个 deep
cycle电池就可以启动了。
【在 s*****o 的大作中提到】
: 麻老大把船长证考出来了？俺只用过deep cycle，纯顶。
| W*******s
发帖数: 18705 | 14 I Tell Ya, go buy a new powerful cranking battery. It is not funny being
stuck on the water.
【在 m******h 的大作中提到】
: 威力说的对， MA 不需要驾照， 而且不是comercial 的， 就更不需要了，比你那里有
: 人味， 哈哈哈
: 刚才试了一下并联， 今天比较冷，40 度，没有效果， 喷了点starter， 一个 deep
: cycle电池就可以启动了。
| m******h
发帖数: 5753 | 15 not only a crank battery, but also a back up outboard, I do not want to lose
power on on water.
By they, did you find out why you can't use a gallon milk jug fill with
water to use as an anchor?
【在 W*******s 的大作中提到】
: I Tell Ya, go buy a new powerful cranking battery. It is not funny being
: stuck on the water.
| W*******s
发帖数: 18705 | 16 嘿嘿，I Don't Know。我有想到过物理的常识，也想到以前从井里打水拉上来蛮费力的
，不是一个空桶的重量哦。所以，就算不是个真正固底的锚，对于冲气船有一定的托拉
力。Someone Just Need To Try It。Not Too Much Effort Involved.LOL.
If your motor has a built in alternator, you don't need a second battery as a
backup. You need a good solid high power rating cranking battery. I don't
know about your boat.Other electrical stuff can be wired on a separate
battery.
lose
【在 m******h 的大作中提到】
: not only a crank battery, but also a back up outboard, I do not want to lose
: power on on water.
: By they, did you find out why you can't use a gallon milk jug fill with
: water to use as an anchor?
| c*****y
发帖数: 5747 | 17 对不起啊！
很久没来了。最近忙装修和期末考试。
没天天上鱼版，抱歉啊！
看来答案早被师兄们找到了。
保持联系。
我五月后就不忙了，准备夏天好好钓钓鱼。 |
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