CN207466374U - A kind of battery pack protection circuit - Google Patents
A kind of battery pack protection circuit Download PDFInfo
- Publication number
- CN207466374U CN207466374U CN201721024928.9U CN201721024928U CN207466374U CN 207466374 U CN207466374 U CN 207466374U CN 201721024928 U CN201721024928 U CN 201721024928U CN 207466374 U CN207466374 U CN 207466374U
- Authority
- CN
- China
- Prior art keywords
- battery pack
- anode
- electronic switch
- protection circuit
- battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Battery Mounting, Suspending (AREA)
Abstract
The utility model provides a kind of battery pack protection circuit, including multiple battery packs and the one-to-one battery management system of multiple battery packs and protection circuit；The anode of multiple battery packs is connected to form a total anode, and the cathode of multiple battery packs is connected to form a total cathode；Each protection circuit includes the first electronic switch, the second electronic switch, the first diode and the second diode；One end of first electronic switch is connected with the anode of corresponding battery pack, and the other end is connected by the second electronic switch with total anode；The anode of first diode is connected with the anode of corresponding battery pack and cathode is connected between corresponding first electronic switch and corresponding second electronic switch；The anode of second diode is connected with total anode and cathode is connected between corresponding first electronic switch and corresponding second electronic switch.Battery pack protection circuit provided by the utility model can protect battery pack to improve battery pack service life.
Description
【Technical field】
The utility model is related to electric vehicle engineering field more particularly to a kind of battery pack protection circuits.
【Background technology】
In order to meet the high voltage demands of electric vehicle, usually first battery pack is composed in series, then by more by several single batteries
Group battery pack composes in parallel battery pack.Wherein, every group of battery pack all corresponds to one or more relay to be carried out to battery pack
Charge and discharge control.
However, if there are pressure differences between battery pack, larger dash current can be generated when the moment that relay is closed, and then
By battery damage or the service life of influence battery pack.
In consideration of it, it is really necessary to provide a kind of new battery pack protection circuit to overcome drawbacks described above.
【Utility model content】
The purpose of this utility model, which is to provide, a kind of can protect battery pack to improve battery pack service life
Battery pack protection circuit.
To achieve these goals, the utility model provides a kind of battery pack protection circuit, including multiple battery packs and institute
State the one-to-one battery management system of multiple battery packs；Each battery management system and the corresponding battery pack phase
Even, for monitoring the status information of the corresponding battery pack；Each battery pack includes positive electrode and negative electrode, the multiple electricity
The anode of pond group is connected to form a total anode, and the cathode of the multiple battery pack is connected to form a total cathode；The electricity
Pond group protective device further includes multiple and the multiple battery pack and protects circuit correspondingly；The anode of each battery pack
It is connected by the corresponding protection circuit with total anode；Each protection circuit includes the first electronic switch, the
Two electronic switches, the first diode and the second diode；One end of first electronic switch and the corresponding battery pack
Anode be connected, and the other end is connected by second electronic switch with total anode；The anode of first diode
It is connected with the anode of the corresponding battery pack, the cathode of first diode is connected to corresponding first electronic switch
Between corresponding second electronic switch；The anode of second diode is connected with total anode, and the described 2nd 2
The cathode of pole pipe is connected between corresponding first electronic switch and corresponding second electronic switch.
In a preferred embodiment, first electronic switch and second electronic switch are contactor.
In a preferred embodiment, each battery management system includes a Hall sensor；It is described every
A Hall sensor is connected between the cathode of the corresponding battery pack and total cathode；Each battery management system
The electric current of the corresponding battery pack is detected by corresponding Hall sensor.
In a preferred embodiment, the battery pack includes the single battery of several series connection；The single battery is
Ferric phosphate lithium cell.
In a preferred embodiment, the voltage of the status information of the battery pack including the battery pack, electric current with
And temperature.
Battery pack protection circuit provided by the utility model, due to being provided with protection electricity between each battery pack and total anode
Road, so that when multiple battery packs carry out charge and discharge, even if there are pressure differences to improve battery pack by battery damage
Service life.
【Description of the drawings】
Fig. 1 is the circuit diagram of battery pack protection circuit provided by the utility model.
【Specific embodiment】
It is clear in order to be more clear the purpose of this utility model, technical solution and advantageous effects, below in conjunction with
Attached drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, shows
So, the described embodiments are only a part of the embodiments of the utility model, instead of all the embodiments.It is new based on this practicality
Embodiment in type, the every other implementation that those of ordinary skill in the art are obtained without making creative work
Example, shall fall within the protection scope of the present invention.
When an element was considered with another element " being connected ", it can be directly 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 with belonging to this reality
It is identical with the novel normally understood meaning of those skilled in the art.Made in the specification of the utility model herein
Term is intended merely to the purpose of description specific embodiment, it is not intended that in limitation the utility model.
Referring to Fig. 1, it is the circuit diagram of battery pack protection circuit 100 provided by the utility model.The battery
Group protective device 100 includes the battery pack 10 of multiple parallel connections and the multiple 10 one-to-one battery management system of battery pack
20.Wherein, each battery management system (Battery Management System, BMS) 20 and the corresponding battery
Group 10 is connected, for monitoring the status information of the corresponding battery pack 10.In the present embodiment, the shape of the battery pack 10
State information includes voltage, electric current and the temperature of the battery pack 10.The battery pack 10 includes the single battery of several series connection
11.Wherein, the single battery 11 can be ferric phosphate lithium cell.It is appreciated that each battery pack 10 include anode with
Cathode, wherein, the anode of the multiple battery pack 10 is connected to form a total anode, and the cathode phase of the multiple battery pack 10
Even form a total cathode.The multiple battery pack 10 carries out charge and discharge by total anode and total cathode.This implementation
In mode, illustrated by taking two battery packs 10 as an example.
Further, the battery pack protection circuit 100 further includes multiple one-to-one with the multiple battery pack 10
Protect circuit 30.The anode of each battery pack 10 is connected by the corresponding protection circuit 30 with total anode.Institute
It states each protection circuit 30 and includes the first electronic switch K1, the second electronic switch K2, the first diode D1 and the two or two pole
Pipe D2.Wherein, one end of the first electronic switch K1 is connected, and the other end passes through with the anode of the corresponding battery pack 10
The second electronic switch K2 is connected with total anode.The anode of the first diode D1 and the corresponding battery pack 10
Anode be connected, the cathode of the first diode D1 is connected to the corresponding first electronic switch K1 and second electronics
Between switch K2.The anode of the second diode D2 is connected with total anode, and the cathode of the second diode D2 is connected to pair
Between the first electronic switch K1 and the second electronic switch K2 that answer.In the present embodiment, first electronic cutting
Pass K1 and the second electronic switch K2 is contactor.
Further, each battery management system 20 includes a Hall sensor H.Each hall sensing
Device H is connected between the cathode of the corresponding battery pack 10 and total cathode.Each battery management system 20 passes through
Corresponding Hall sensor H detects the electric current of the corresponding battery pack 10.
The operation principle of battery pack protection circuit 100 provided by the utility model is as follows：
When the multiple battery pack 10 is discharged, the multiple second electronic switch K2 is closed at and the multiple first
Electronic switch K1 is disconnected, at this point, each battery pack 10 is put by the first diode D1 and the second electronic switch K2
Electricity, even if there are pressure difference between each battery pack 10, due to the effect of the first diode D1, between the multiple battery pack 10
Reflux is not had, and the only high battery pack 10 of voltage is discharged.Due to the first diode D1, there are pressure drops and work item
Part limits, and when being worked by larger electric current, the first diode D1 will become a power consuming devices, and fever is serious, this
When the electric current of corresponding battery pack 10 can be detected by the Hall sensor H of corresponding battery management system 20, when electric current becomes
When stabilization (not changing), the multiple first electronic switch K1 is controlled to be closed, at this point, due between multiple battery packs 10
There is no pressure difference or pressure difference are very small, therefore the impact of circuit can not be considered, and then play to multiple battery packs substantially
10 effects protected.Similarly, when charging for multiple battery packs 10, the first electronic switch K1 is closed first and second is electric
Sub switch K2 is disconnected, and is closed when the electric current of multiple battery packs 10 is stablized, then by the second electronic switch K2.
Battery pack protection circuit 100 provided by the utility model, due to being provided between each battery pack 10 and total anode
Circuit is protected, so that when multiple battery packs 10 carry out charge and discharge, battery pack 10 will not be damaged, carried even if there are pressure differences
The high service life of battery pack 10.
The utility model is not restricted to described in specification and embodiment, therefore for the personnel of familiar field
For other advantage and modification is easily implemented, therefore in the universal limited without departing substantially from claim and equivalency range
Spirit and scope in the case of, the utility model is not limited to specific details, representative equipment and shown here as with retouching
The diagram example stated.
Claims (5)
1. a kind of battery pack protection circuit, including multiple battery packs and the one-to-one battery management system of the multiple battery pack
System；Each battery management system is connected with the corresponding battery pack, for monitoring the state of the corresponding battery pack
Information；It is characterized in that：Each battery pack includes positive electrode and negative electrode, and the anode of the multiple battery pack is connected to form one
Total anode, and the cathode of the multiple battery pack is connected to form a total cathode；The battery pack protection circuit further includes multiple
Circuit is protected correspondingly with the multiple battery pack；The anode of each battery pack passes through the corresponding protection circuit
It is connected with total anode；It is described it is each protection circuit include the first electronic switch, the second electronic switch, the first diode with
And second diode；One end of first electronic switch is connected, and the other end passes through with the anode of the corresponding battery pack
Second electronic switch is connected with total anode；The anode of the anode of first diode and the corresponding battery pack
It is connected, the cathode of first diode is connected to corresponding first electronic switch and corresponding second electronic switch
Between；The anode of second diode is connected with total anode, and the cathode of second diode is connected to corresponding institute
It states between the first electronic switch and corresponding second electronic switch.
2. battery pack protection circuit as described in claim 1, it is characterised in that：First electronic switch and second electricity
Sub switch is contactor.
3. battery pack protection circuit as described in claim 1, it is characterised in that：Each battery management system includes one
A Hall sensor；Each Hall sensor is connected between the cathode of the corresponding battery pack and total cathode；
Each battery management system detects the electric current of the corresponding battery pack by corresponding Hall sensor.
4. battery pack protection circuit as described in claim 1, it is characterised in that：The battery pack includes the monomer of several series connection
Battery；The single battery is ferric phosphate lithium cell.
5. battery pack protection circuit as described in claim 1, it is characterised in that：The status information of the battery pack includes described
Voltage, electric current and the temperature of battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721024928.9U CN207466374U (en) | 2017-08-16 | 2017-08-16 | A kind of battery pack protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721024928.9U CN207466374U (en) | 2017-08-16 | 2017-08-16 | A kind of battery pack protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207466374U true CN207466374U (en) | 2018-06-08 |
Family
ID=62256722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721024928.9U Expired - Fee Related CN207466374U (en) | 2017-08-16 | 2017-08-16 | A kind of battery pack protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207466374U (en) |
-
2017
- 2017-08-16 CN CN201721024928.9U patent/CN207466374U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180608 Termination date: 20180816 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |