CN207339374U - A kind of battery pack - Google Patents
A kind of battery pack Download PDFInfo
- Publication number
- CN207339374U CN207339374U CN201721484680.4U CN201721484680U CN207339374U CN 207339374 U CN207339374 U CN 207339374U CN 201721484680 U CN201721484680 U CN 201721484680U CN 207339374 U CN207339374 U CN 207339374U
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- battery pack
- battery
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- voltage
- equalization system
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Abstract
The utility model provides a kind of battery pack, including active equalization system, super-charge super-discharge protection switch and the master controller that multiple battery packs, the sheet metal of heat-insulating, fire-preventing and each battery pack being connected in series are correspondingly arranged；Multiple battery component layers are arranged under the overlay；Sheet metal is arranged between the battery pack of adjacent two layers, and is fitted and connected in anode towards its that layer of battery pack, is scribbled expanding fire-proof paint in the one side towards battery electrode or is scribbled expanding fire-proof paint on its two sides；Master controller is controlled active equalization system and super-charge super-discharge protection switch.The active equalization system of the battery pack can effectively reduce voltage difference of the battery pack during charging and discharging, prevent that battery pack is overcharged and overdischarge.Simultaneously as not using electrical/electronic to switch in battery pack to control current loop, eliminates the security risk that electric current is brought by electrical/electronic switch generation heat.
Description
Technical field
The technical field of battery manufacture is the utility model is related to, more particularly, to a kind of battery pack.
Background technology
Lithium ion battery has the advantages that durability is good, has extended cycle life and innocuous substance, it is substituted in clean energy resource
It is widely used in kind.With the decline of lithium battery price, lithium ion battery is in dynamic bicycle and golf cart
In started progressively to substitute lead-acid accumulator.
Lithium ion battery generally includes anode, cathode, partition plate and electrolyte.Modern lithium ion battery is usually using graphite material
Material is used as anode, and transition metal oxide is as cathode.During charge discharges, lithium ion passes between a cathode and an anode
It is defeated.The voltage of general single lithium battery is in 2V between 5V.Therefore, target voltage and capacity to be realized, it is necessary to by multiple batteries
Connect and be together in parallel use.
In general, the energy density of each battery, self-discharge rate and internal resistance are likely to difference.When battery is used in series
When, capacity, the self-discharge rate of battery are different by the voltage for causing each battery with the difference of internal resistance.With the charging of battery, hold
Measure that the voltage of less battery is very fast by increase ratio, the voltage of the larger battery of capacity will rise slow.In this way, capacity is smaller
Battery be more likely overcharged.When the cell is discharged, the voltage of the larger battery of capacity can the less battery of specific capacity
Voltage reduce it is slower, so cause the less battery of capacity to be more likely overcharged.
Since lithium battery is usually sensitive to overcharge and overdischarge, and overcharge and overdischarge will damage lithium battery circulation
Performance.Meanwhile overcharge possibly even causes battery fire.
Lithium battery super-charge super-discharge in order to prevent, people control the working voltage scope of lithium battery using battery protecting plate.
The circuit protection plate is usually made of the control chip and electronic switch of detection cell voltage, wherein electronic switch be used for connect and
Disconnecting circuit.The electric current of all discharge and recharges will pass through the electronic switch on control panel.And these electronic switches are usually by CMOS tube
Form.
The heat dissipation for handling electronic switch well is to ensure a key factor of lithium battery safety.Since ohm heat is I2R
（Square * resistance of current strength）, with the increase of circuital current, the heat production of electronic switch will dramatically increase.Therefore, in difference
Battery pack application in, battery management system need it is individually designed according to its battery current use scope.If overcurrent-overvoltage
Conservative management is not good at, and can often trigger fire.In addition, increase electronic switch cost would generally increase battery management system in systems
Overall manufacture cost.
Therefore, it is necessary to the battery pack device of existing lithium battery is improved and optimized, it is a kind of effective to design
Prevent that super-charge super-discharge is electric, and battery pack that is easy to repair, having a safety feature.
The content of the invention
In order to solve the above problem existing in the prior art, the utility model provides a kind of using modular battery group
Battery pack, sets corresponding active equalization system in each battery pack, which can effectively reduce battery pack and exist
Voltage difference during charging and discharging, prevents that battery pack is overcharged and overdischarge.Simultaneously as do not make in battery pack
Current loop is controlled with other electrical/electronics such as metal-oxide-semiconductor switch, electric current is eliminated and generation heat is switched by electrical/electronic
The security risk brought.
To achieve these goals, the utility model provides following technical solution：
A kind of battery pack, including the multiple battery packs, sheet metal of heat-insulating, fire-preventing, corresponding with each battery pack being connected in series
Active equalization system, super-charge super-discharge protection switch and the master controller of setting；The multiple battery component layers are arranged under the overlay；Institute
State sheet metal to be arranged between the battery pack of adjacent two layers, and be fitted and connected in anode towards its that layer of battery pack；The gold
Belong to piece to scribble expanding fire-proof paint in the one side towards battery electrode or scribble expanding fire-proof paint on its two sides；Institute
Active equalization system is stated, for reducing the voltage difference between multiple battery packs；The super-charge super-discharge protection switch was receiving
It is triggered during charging/overdischarge signal；The master controller is controlled active equalization system and super-charge super-discharge protection switch.
It is in hierarchal arrangement state between battery pack, and is connected in series, gold is provided between the battery of adjacent two layers
Belong to piece, which is fitted and connected in anode towards its that layer of battery pack, and scribbles in the one side towards battery electrode swollen
Bulging fireproof coating, especially buckling type steelwork coating；Further, sheet metal can also its two sides be coated with dilatancy
Fireproof coating.These coating can absorb certain heat, and heated while, fireproof coating volumetric expansion play every
The effect of heat, while prevent battery in parallel in battery pack from triggering chain failure.
When the battery in battery pack catches fire, the block of battery can open in effective space, and so catch fire battery
Without departing from battery pack structure, make other battery packs of battery pack will not be impacted.
In the measure of prevention battery overcharge/overdischarge, which employs master controller control active equalization system
System, so as to carry out the balance of voltage to there are the battery pack of voltage difference；If the voltage of battery pack is beyond the safe operation of battery
Scope, master controller then disconnect super-charge super-discharge protection switch, and then cutoff circuit, thus effectively prevent battery pack be overcharged and
Overdischarge, improves the safety in utilization of lithium battery.
As further describing for the technical solution of the utility model, also connected between the multiple battery pack by signal wire
Connect, when any one battery pack reaches overcharge/cross put state after, which, which will send, overcharges/crosses discharge signal via signal wire
Other battery packs are passed to, and are eventually transferred to master controller.
It is this transmission be cascade, i.e. a battery pack send overcharge/cross discharge signal, other battery packs will all receive this
Signal, and pass up to the master controller of battery pack.Master controller and then by controlling active equalization system, to whole battery
The voltage of bag is balanced.
As further describing for the technical solution of the utility model, the active equalization system includes voltage checking chip
With balance of voltage module, the voltage of the corresponding battery pack of voltage checking chip measurement simultaneously judges whether to exceed charge threshold or low
In discharge threshold；The balance of voltage module carries out the voltage of multiple battery packs balanced.
The voltage management of battery pack is to control the voltage range of operation of battery pack in the operational envelope less than battery
It is interior.When the voltage of battery pack exceeds range of operation, but is located at the operational envelope of battery, the voltage of this battery pack differs
Cause, electric voltage equalization is carried out by the balance of voltage module of battery pack.
If the voltage checking chip in active equalization system detects that the voltage of corresponding battery pack has exceeded charge threshold
Or less than discharge threshold, that is, the operational envelope of battery is exceeded, which will send overcharge/overdischarge letter
Number, and the voltage checking chip of cascade is transmitted to by signal wire, the master controller of battery pack is eventually transferred to, master controller will be sent out
Go out alarm signal, and disconnect super-charge super-discharge protection switch, and then cutoff circuit, protect battery pack.
The battery pack of this battery pack is balanced voltage using active equalization system, does not use and electrically or electronically opens
Close such as MOS electronic switches, that is, the electric current for flowing through battery pack will not pass through and electrically or electronically switch, this will be eliminated electrically or electronically
The security risk brought due to producing amount of heat is switched, achievees the purpose that to protect lithium battery.
As further describing for the technical solution of the utility model, LED light is additionally provided with each battery pack, works as institute
State voltage checking chip and detect that the voltage of corresponding battery pack exceedes charge threshold or less than discharge threshold, concurrent excess of export overcharge
Threshold value or during less than discharge threshold signal, the LED light of the battery pack will be shinny；Positioned at the battery pack and super-charge super-discharge protection switch
Between the LED light of all battery packs also will be shinny.
Master controller receives overcharge/overdischarge signal that voltage checking chip is sent, when then sending alarm signal,
The LED light for being arranged on battery pack will be shinny, at the same time all electricity between the battery pack and super-charge super-discharge protection switch
The LED light of pond group also will be shinny, gives user reminding, this enables a user to the battery pack for readily finding overcharge/overdischarge.
If battery pack fails, it is replaced.
As further describing for the technical solution of the utility model, battery pack is provided with 4 battery packs, 4 electricity
Pond group is connected in series and is arranged by upper and lower two layers, and the thickness of the sheet metal is 1mm.Battery pack as the utility model
A kind of structure, which employs 4 Battery pack groups, and be arranged in two layers setting, and 72 and lithium electricity are used per Battery pack group
Pond, is provided with the sheet metal of 1mm between the battery pack of layering, which scribbles expansion steel-structure fireproofing coating.Research
Person has found that the battery pack is safe while use is stablized in experiment, when the single lithium battery of battery pack therein occurs
When catching fire, effectively the situation of catching fire can be blocked to spread vertically and horizontally.
As further describing for the technical solution of the utility model, the cell parallel connection in the battery pack.
As further describing for the technical solution of the utility model, connected between the battery pack by electrode connector
Connect.
Battery pack is using the cell parallel in battery pack, the connection mode connected between battery pack, makes the battery strings of battery pack
Being connected in parallel becomes easy.And battery pack avoids the deficiency heat dissipation of MOS electronic switches resistance to pressure without using MOS electronic switches
The bad situation for causing to catch fire occurs.
As further describing for the technical solution of the utility model, the battery of battery pack is cylindricality lithium battery.
Based on above-mentioned technical solution, the technique effect that the utility model obtains is：
（1）Battery pack provided by the utility model, using active equalization system to corresponding electricity in cell voltage management
Pond group carries out electric voltage equalization, and not using electrically or electronically switch such as MOS electronic switches, that is, the electric current for flowing through battery pack will not
Can be by electrically or electronically switching, this will eliminate the security risk for electrically or electronically switching and being brought due to producing amount of heat, reach
To the purpose of protection lithium battery.
（2）The battery pack of the utility model, if the voltage of battery pack has exceeded charge threshold or less than discharge threshold,
When having exceeded the operational envelope of battery, master controller will send alarm signal and disconnect super-charge super-discharge protection switch, make
The battery pack of overcharge/overdischarge can readily be found by obtaining user, and easily the battery pack of failure can be replaced.
（3）The battery pack of the utility model, the sheet metal being arranged between the battery of adjacent two layers, bears towards battery pack
The expansion shape fire-resistant coating for steel structure or two sides that the one side of pole scribbles scribble fireproof coating.The coating can when battery catches fire
To absorb certain heat, and heated while, heat-insulated effect is played in fireproof coating volumetric expansion, while prevents battery
Battery in parallel triggers chain failure in group, so as to ensure the overall security of battery pack.
Brief description of the drawings
Fig. 1 is the structure diagram of the battery pack of the battery pack of the utility model.
Fig. 2 is the partial structurtes enlarged drawing of the battery pack of the battery pack of the utility model.
Fig. 3 is battery pack connection and the schematic diagram of battery management of the battery pack of the utility model.
Embodiment
For the ease of understanding the utility model, the utility model is carried out more below in conjunction with attached drawing and specific embodiment
Comprehensive description.The better embodiment of the utility model is given in attached drawing.But the utility model can be with many differences
Form realize, however it is not limited to embodiments described herein.On the contrary, the purpose for providing these embodiments is to make pair
The more thorough and comprehensive that the disclosure of the utility model understands.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with belonging to the technology of the utility model
The normally understood implication of technical staff in domain is identical.It is simply in the term used in the description of the utility model herein
The purpose of description specific embodiment, it is not intended that in limitation the utility model.
Embodiment 1
Fig. 1 and Fig. 2 sets forth structure diagram and the partial structurtes amplification of the battery pack of the battery pack of the present embodiment
Figure, Fig. 3 are battery pack connection and the schematic diagram of battery management of the battery pack of the utility model.With reference to reference to 1 ~ Fig. 3 of figure, one kind
Battery pack, including in the battery pack 1 of layered arrangement and the sheet metal 2 of heat-insulating, fire-preventing.In the present embodiment, battery pack is arranged to go here and there
Joining battery pack A, battery pack B, battery pack C and the battery pack D to link together, wherein battery pack A and battery pack B are located at upper strata,
Battery pack C and battery pack D is located at lower floor, can be connected in series together by electrode connector between battery pack, and each electricity
Battery inside the group of pond is then connected in parallel.It is provided with 4 battery packs in this battery pack altogether, it is 72 in parallel in each battery pack
Cylindricality lithium ion battery, cylindricality lithium ion battery as needed could be provided as 18650 batteries.
As shown in Fig. 2, the cathode of battery pack A and battery pack D are above, anode is located at lower section；Battery pack B and battery pack
The anode of C is above, and cathode is located at lower section.Spacing can be installed between the battery pack of layering, spacing can not also be stayed.Need
It is noted that sheet metal 2 is provided between upper and lower two layers of battery pack, while sheet metal 2 is fitted and connected in anode direction
Its that layer of battery pack.It is 1mm sheet metals that two panels thickness is provided between the battery pack of the present embodiment, and wherein piece of metal piece pastes
The bottom of battery pack A is connected to, in addition piece of metal piece is amplexiformed in the top of battery pack C.Sheet metal 2 is towards battery electrode
Expansion steel-structure fireproofing coating is simultaneously scribbled, forms fireproof coating layer 21.Certainly, sheet metal 2 can also be applied at its two layers
There is dope layer, be further ensured that flameproof effect.
It should be noted that the fireproof coating layer 21 that the expansion steel-structure fireproofing coating is formed can absorb certain heat
Amount, and heated while, heat-insulated effect is played in fireproof coating volumetric expansion, while prevents battery in parallel in battery pack
Trigger chain failure.
When the battery in battery pack catches fire, the block of cylindrical battery is opened in effective space, and so catch fire battery
Without departing from battery pack structure, make other battery packs of battery pack will not be impacted.Between being installed between every layer of battery pack
Away from when, this effective space of opening then is further ensured that.
With reference to figure 3, in the battery management system of battery pack, also connected between multiple battery packs by signal wire 11, often
A battery pack 1 is correspondingly arranged on active equalization system 3, is additionally provided with super-charge super-discharge protection switch 4 and master controller 5.Always
Controller 5 is electrically connected with active equalization system 3, super-charge super-discharge protection switch 4, and active equalization system 3 and super-charge super-discharge are protected
Shield switch 4 is controlled.
The present embodiment provides the voltage management of battery pack, is to control the voltage range of operation of battery pack less than battery
In operational envelope.When the voltage of battery pack exceeds range of operation, but is located at the operational envelope of battery, this battery
The voltage of group is inconsistent, and electric voltage equalization is carried out by the active equalization system 3 of battery pack 1.In prevention battery overcharge/overdischarge
In measure, which employs master controller 5 and controls active equalization system 3, so as to there are the progress of the battery pack of voltage difference
The balance of voltage.
If the voltage of battery pack, beyond the operational envelope of battery, master controller 5 disconnects super-charge super-discharge protection
Switch 4, and then cutoff circuit, so as to effectively prevent that battery pack is overcharged and overdischarge, improves the safe to use of lithium battery
Property.
It should be noted that in active equalization system 3, including voltage checking chip 31 and balance of voltage module 32, electricity
The voltage of the corresponding battery pack of the pressure measurement of detection chip 31 simultaneously judges whether to exceed charge threshold or less than discharge threshold.
If the voltage checking chip 31 in active equalization system 3 detects that the voltage of corresponding battery pack has exceeded charging threshold
Value or less than discharge threshold, that is, exceeded the operational envelope of battery, the voltage checking chip 31 will send overcharge/
Overdischarge signal, and the voltage checking chip of cascade is transmitted to by signal wire, the master controller 5 of battery pack is eventually transferred to, always
Controller 5 will send alarm signal, and disconnect super-charge super-discharge protection switch 4, and then cutoff circuit, protect battery pack.
Since the battery pack 1 of this battery pack is balanced voltage using active equalization system 3, using electrically or
Electronic switch such as MOS electronic switches, that is, the electric current for flowing through battery pack will not pass through and electrically or electronically switch, this will eliminate electric
Or the security risk that electronic switch is brought due to producing amount of heat, achieve the purpose that to protect lithium battery.
Further, it is additionally provided with LED light in each battery pack（Do not marked in figure）, when voltage checking chip 31 detects
Voltage to corresponding battery pack exceedes charge threshold or less than discharge threshold, sends more than charge threshold or believes less than discharge threshold
Number.
At this time, master controller receives overcharge/overdischarge signal that voltage checking chip is sent, and then sends alarm signal
Number when, the LED light for being arranged on battery pack will be shinny, at the same time the institute between the battery pack and super-charge super-discharge protection switch
The LED light for having battery pack also will be shinny, gives user reminding, this enables a user to the electricity for readily finding overcharge/overdischarge
Pond group.If battery pack fails, it is replaced.
A kind of battery pack using modular battery group provided in this embodiment, sets corresponding master in each battery pack
Equal balance system is moved, which can effectively reduce voltage difference of the battery pack during charging and discharging, prevent battery
It is coated with overcharge and overdischarge.Simultaneously as do not controlled in battery pack using other electrical/electronics such as metal-oxide-semiconductor switch
Current loop, eliminates electric current and the security risk for producing heat and bringing is switched by electrical/electronic.
The battery pack of the present embodiment is safe, and scalability is strong, the metal being arranged between bilevel battery pack
Piece, in the expansion shape fire-resistant coating for steel structure that the one side towards battery electrode scribbles.The coating can be inhaled when battery catches fire
Receive certain heat, and heated while, heat-insulated effect is played in fireproof coating volumetric expansion, while prevents in battery pack
Battery in parallel triggers chain failure, so as to ensure the overall security of battery pack.
Above content is only the structure example and explanation of the utility model, its description is more specific and detailed,
But it should not be interpreted as limiting the scope of the present invention.It should be pointed out that for the common of this area
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these it is aobvious and
The alternative forms being clear to belong to the scope of protection of the utility model.
Claims (8)
- A kind of 1. battery pack, it is characterised in that including be connected in series multiple battery packs, the sheet metal of heat-insulating, fire-preventing, with it is each Active equalization system, super-charge super-discharge protection switch and the master controller that battery pack is correspondingly arranged；The multiple battery component layers are arranged under the overlay；The sheet metal is arranged between the battery pack of adjacent two layers, and is fitted and connected in anode towards its that layer of battery pack； The sheet metal scribbles expanding fire-proof paint in the one side towards battery electrode or scribbles expansion fire-proof on its two sides Coating；The active equalization system, for reducing the voltage difference between multiple battery packs；The super-charge super-discharge protection switch is triggered when receiving overcharge/overdischarge signal；The master controller is controlled active equalization system and super-charge super-discharge protection switch.
- 2. battery pack according to claim 1, it is characterised in that also connected between the multiple battery pack by signal wire Connect, when any one battery pack reaches overcharge/cross put state after, which, which will send, overcharges/crosses discharge signal via signal wire Other battery packs are passed to, and are eventually transferred to master controller.
- 3. battery pack according to claim 1, it is characterised in that the active equalization system include voltage checking chip and Balance of voltage module, the voltage of the corresponding battery pack of voltage checking chip measurement simultaneously judge whether to exceed charge threshold or are less than Discharge threshold；The balance of voltage module carries out the voltage of multiple battery packs balanced.
- 4. battery pack according to claim 3, it is characterised in that LED light is additionally provided with each battery pack, when described Voltage checking chip detects that the voltage of corresponding battery pack exceedes charge threshold or less than discharge threshold, concurrent excess of export overcharge threshold Value or during less than discharge threshold signal, the LED light of the battery pack will be shinny；Positioned at the battery pack and super-charge super-discharge protection switch it Between the LED light of all battery packs also will be shinny.
- 5. battery pack according to claim 1, it is characterised in that battery pack is provided with 4 battery packs, 4 batteries Group is connected in series and is arranged by upper and lower two layers, and the thickness of the sheet metal is 1mm.
- 6. battery pack according to claim 1, it is characterised in that the cell parallel connection in the battery pack.
- 7. battery pack according to claim 1, it is characterised in that connected phase by electrode connector between the battery pack Connect.
- 8. according to any battery pack of claim 1 ~ 7, it is characterised in that the battery of battery pack is cylindricality lithium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721484680.4U CN207339374U (en) | 2017-11-09 | 2017-11-09 | A kind of battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721484680.4U CN207339374U (en) | 2017-11-09 | 2017-11-09 | A kind of battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207339374U true CN207339374U (en) | 2018-05-08 |
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ID=62427630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721484680.4U Active CN207339374U (en) | 2017-11-09 | 2017-11-09 | A kind of battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207339374U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107834632A (en) * | 2017-11-09 | 2018-03-23 | 威艾能源（惠州）有限公司 | A kind of battery bag |
-
2017
- 2017-11-09 CN CN201721484680.4U patent/CN207339374U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107834632A (en) * | 2017-11-09 | 2018-03-23 | 威艾能源（惠州）有限公司 | A kind of battery bag |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210301 Address after: 311200 room 301-52, Xiaoshan science and Technology City, building 1, ChuanHua science and technology building, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee after: Weiai energy (Hangzhou) Co.,Ltd. Address before: 516229 room 1208, building C, Kaichen technology business incubator, No. 49, Chenjiang Avenue North, Chenjiang street, Zhongkai high tech Zone, Huizhou City, Guangdong Province Patentee before: WEIAI ENERGY (HUIZHOU) Co.,Ltd. |
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| TR01 | Transfer of patent right |