CN109080468A - A kind of band overcharges the method for early warning and system of the battery modules of protective device - Google Patents
A kind of band overcharges the method for early warning and system of the battery modules of protective device Download PDFInfo
- Publication number
- CN109080468A CN109080468A CN201810678668.XA CN201810678668A CN109080468A CN 109080468 A CN109080468 A CN 109080468A CN 201810678668 A CN201810678668 A CN 201810678668A CN 109080468 A CN109080468 A CN 109080468A
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- China
- Prior art keywords
- battery
- protective device
- battery modules
- busbar
- voltage
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/547—Voltage
-
- 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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- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The present invention relates to electric automobile power battery fields, and in particular to a kind of band overcharges the method for early warning and system of the battery modules of protective device.Programme element is: passing through with the battery cell for overcharging protective device and constitutes battery modules in series and parallel; the overturning structure that protective device is overcharged in battery cell is connected with positive plate, is located at below negative electrode tab, when thermal runaway occurs; protective device triggering is overcharged, battery forms open circuit.Voltage acquisition line is fixed on busbar, for acquiring the voltage between the adjacent two pieces of batteries in shunt circuit, and voltage signal is sent to processor.Processor is for receiving the collected voltage signal of voltage acquisition line, judge whether electric current increases in busbar according to the size of voltage value, i.e. whether the electric current of shunt circuit increases, to judge whether that thermal runaway has occurred in existing single battery, leads to internal short-circuit of battery；If thermal runaway has occurred, battery modules are made with the instruction to stop working and issues alarm signal.
Description
Technical field
The present invention relates to electric automobile power battery fields, and in particular to a kind of band overcharges the battery modules of protective device
Method for early warning and system.
Background technique
Battery is the power resources of electric car, to meet different voltage and energy requirement, power train in vehicle application lithium-ion electric
Pond group is usually used by a certain number of single batteries by series-parallel mode in groups, i.e. battery modules.Currently, just extremely three
The lithium-ion battery monomer of first material by installation overcharge protective device realize battery overcharge and thermal runaway protection, but battery at
After group, due to the influence of production technology, single battery inconsistency, lead to that charge and discharge can not be stopped when battery modules thermal runaway,
Very big threat is caused to the safety of battery and vehicle.Therefore, develop a kind of safer battery modules method for early warning and
System is very important.
Summary of the invention
The purpose of the present invention is to provide the method for early warning that a kind of band overcharges the battery modules of protective device, for solving electricity
The problem of can not stopping charge and discharge when Chi Mo group thermal runaway.
In order to solve the above technical problems, the present invention provides the pre- police that a kind of band overcharges the battery modules of protective device
Method, comprising the following steps:
1) voltage between neighbouring sample point of the acquisition on same busbar；Battery modules are constituted and are connected by busbar
And/or parallel-connection structure, anode/cathode of the corresponding single battery of each sampled point；
2) judged according to voltage value size, if voltage value increases, judgement has single battery that thermal runaway occurs, if heat occurs
Out of control, processor issues alarm signal.
The present invention also provides the early warning systems that a kind of band overcharges the battery modules of protective device, to realize following method:
1) voltage between neighbouring sample point of the acquisition on same busbar；Battery modules are constituted and are connected by busbar
And/or parallel-connection structure, anode/cathode of the corresponding single battery of each sampled point；
2) judged according to voltage value size, if voltage value increases, judgement has single battery that thermal runaway occurs, if heat occurs
Out of control, processor issues alarm signal.
Beneficial effects of the present invention:
A kind of band provided by the invention overcharges the method for early warning and system of the battery modules of protective device, for solving installation
There are the battery modules for the battery composition for overcharging protective device as overcharging, overheating, internal short-circuit, collision, heat is lost caused by aging etc.
Control problem.Battery modules are monitored in real time using voltage acquisition line and processor, are done in time in battery modules thermal runaway
It stops working out and instruction and issues thermal runaway alarm signal, technical staff or operator is enable to find danger in time, guarantee
The safety of battery modules.
Further, voltage acquisition line and busbar are welded to connect.
Further, busbar and battery electrode column are welded to connect.
Further, processor is battery management system.
Detailed description of the invention
Fig. 1 is the connection schematic diagram of busbar Yu voltage acquisition line；
Fig. 2 is the early warning system flow chart of this battery modules.
Specific embodiment
To keep the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, to the present invention
It is described in further detail.
For lithium ion battery, just extremely ternary material, cathode are graphite, wherein overcharging configured with protective device is overcharged
Protective device includes cathode overturning structure and positive fusing structure, and cathode overturning structure is located at below single battery cathode, and with
Anode is connected, secondary inside single battery when thermal runaway (overcharge, overheat, internal short-circuit, collision, aging etc.) occurs for single battery
Reaction aggravation generates bulk gas, and single battery air pressure inside increases, and pushes overturning structure to be flipped up, connects with negative electrode tab
Touching causes internal short-circuit of battery so that negative electrode tab and positive plate are directly connected to by overturning structure, and shunt circuit electric current increases；
The inflow-rate of water turbine of positive fusing structure is more than load current value, and positive fusing structure is blown, and battery forms open circuit.
It is adapted to method for early warning of the invention with the single lithium battery mould group for overcharging protective device for this,
Lower mask body is introduced.
Formed as shown in Figure 1 for six single batteries 3P2S battery modules (six single batteries be respectively (7,1), (8,
2), (9,3), (4,10), (5,11), (6,12)), i.e. three, left side single battery parallel connection, the single battery parallel connection of three, the right, so
Two groups of battery series connection in parallel afterwards.Single battery positive terminal 7,8,9 is connected by the first busbar, and negative terminal 1,2,3 passes through the
Two busbars are connected, so that three pieces of left side single battery parallel connection in figure；Single battery positive terminal 4,5,6 passes through third busbar phase
Even, negative terminal 10,11,12 is connected by the 4th busbar, so that the three pieces of single battery parallel connections in the right, pole 3,4 pass through in figure
Conductor connection is connected, two batteries in parallel connection groups are connected, the series and parallel structure of battery modules is constituted.As shown in Figure 1, voltage acquisition line
Processor is connected, sampled point is welded in busbar and connects each battery electrode column, for measuring the potential on busbar everywhere.Example
Such as, voltage U2- of the processor by detecting the voltage U1-2 between the available negative terminal 1,2 of sampled point, between negative terminal 2,3
3.Under normal conditions, in same shunt circuit, the potential of the anode (or cathode) of two pieces of batteries is close, electric between U1-2, U2-3
It presses minimum.But in the case where thermal runaway (overcharge, overheat, internal short-circuit, collision, aging etc.) occurs, due to internal short-circuit of battery,
Such as 8,2 short circuit of battery, U1-2, U2-3 become larger, so that voltage acquisition line is able to detect that voltage change, processor issues alarm
Signal.
Therefore, method flow of the invention is as shown in Figure 2: (overcharging, overheats, is internal short-circuit, collision, old when thermal runaway occurs
Change etc.) when, protective device triggering is overcharged, battery forms short circuit, and voltage acquisition line is for acquiring the adjacent two pieces of batteries in shunt circuit
Between voltage, and voltage signal is sent to processor.Processor is used to receive the collected voltage signal of voltage acquisition line,
Judge whether electric current increases in busbar according to whether voltage value occurs the increase of the order of magnitude, i.e. the electric current of batteries in parallel connection mould group
Whether increase, to judge whether that thermal runaway has occurred in existing single battery, leads to internal short-circuit of battery；If hot mistake has occurred
Control, then make the instruction to stop working to battery modules and issue thermal runaway alarm signal.
The above method can be executed in the processor with code.Processor can be battery management system.
In addition, voltage acquisition line passes through welding specifically, busbar is connect with lithium ion battery pole by welding manner
Mode is fixed on above busbar, and is applied UV glue at solder joint and protected.
Claims (6)
1. the method for early warning that a kind of band overcharges the battery modules of protective device, which comprises the following steps:
1) voltage between neighbouring sample point of the acquisition on same busbar；Battery modules are constituted and are connected by the busbar
And/or parallel-connection structure, anode/cathode of the corresponding single battery of each sampled point；
2) judged according to voltage value size, if voltage value increases, judgement has single battery that thermal runaway occurs, and loses if heat occurs
Control, processor issue alarm signal.
2. the method for early warning that a kind of band according to claim 1 overcharges the battery modules of protective device, which is characterized in that institute
It states voltage acquisition line and busbar is welded to connect.
3. a kind of band according to claim 1 or 2 overcharges the method for early warning of the battery modules of protective device, feature exists
In the busbar and the battery electrode column are welded to connect.
4. the method for early warning that a kind of band according to claim 1 overcharges the battery modules of protective device, which is characterized in that institute
Stating processor is battery management system.
5. a kind of band overcharges the early warning system of the battery modules of protective device, including processor and memory, which is characterized in that institute
It states processor and executes instruction stored in memory, to realize following method:
1) voltage between neighbouring sample point of the acquisition on same busbar；Battery modules are constituted and are connected by the busbar
And/or parallel-connection structure, anode/cathode of the corresponding single battery of each sampled point；
2) judged according to voltage value size, if voltage value increases, judgement has single battery that thermal runaway occurs, and loses if heat occurs
Control, processor issue alarm signal.
6. the early warning system that a kind of band according to claim 5 overcharges the battery modules of protective device, which is characterized in that institute
Stating processor is battery management system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810678668.XA CN109080468B (en) | 2018-06-27 | 2018-06-27 | Early warning method and system for battery module with overcharge protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810678668.XA CN109080468B (en) | 2018-06-27 | 2018-06-27 | Early warning method and system for battery module with overcharge protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109080468A true CN109080468A (en) | 2018-12-25 |
| CN109080468B CN109080468B (en) | 2021-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810678668.XA Active CN109080468B (en) | 2018-06-27 | 2018-06-27 | Early warning method and system for battery module with overcharge protection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117254220A (en) * | 2023-11-15 | 2023-12-19 | 河南锂动电源有限公司 | Overheat fusing type safe lithium battery pack |
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| US20100136384A1 (en) * | 2009-05-28 | 2010-06-03 | Tesla Motors, Inc. | Battery thermal event detection system using an electrical conductor with a thermally interruptible insulator |
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| CN104655975A (en) * | 2015-02-09 | 2015-05-27 | 清华大学 | Identification method for micro short circuit of battery |
| CN106025405A (en) * | 2016-07-22 | 2016-10-12 | 北京航空航天大学 | Alarming device and method for quick monitoring of power battery failure |
| CN106291370A (en) * | 2016-07-22 | 2017-01-04 | 北京航空航天大学 | Monomer inefficacy method for quick in parallel and device in a kind of connection in series-parallel set of cells |
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2018
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005190911A (en) * | 2003-12-26 | 2005-07-14 | Matsushita Electric Ind Co Ltd | Non-aqueous electrolyte secondary battery |
| CN2852416Y (en) * | 2005-12-24 | 2006-12-27 | 玮辰（龙口）实业有限公司 | Single battery monitoring device inside battery pack |
| US20100136384A1 (en) * | 2009-05-28 | 2010-06-03 | Tesla Motors, Inc. | Battery thermal event detection system using an electrical conductor with a thermally interruptible insulator |
| CN203800141U (en) * | 2014-04-25 | 2014-08-27 | 中航锂电（洛阳）有限公司 | Power battery system with thermal runaway protection function |
| CN104655975A (en) * | 2015-02-09 | 2015-05-27 | 清华大学 | Identification method for micro short circuit of battery |
| CN106025405A (en) * | 2016-07-22 | 2016-10-12 | 北京航空航天大学 | Alarming device and method for quick monitoring of power battery failure |
| CN106291370A (en) * | 2016-07-22 | 2017-01-04 | 北京航空航天大学 | Monomer inefficacy method for quick in parallel and device in a kind of connection in series-parallel set of cells |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117254220A (en) * | 2023-11-15 | 2023-12-19 | 河南锂动电源有限公司 | Overheat fusing type safe lithium battery pack |
| CN117254220B (en) * | 2023-11-15 | 2024-01-30 | 河南锂动电源有限公司 | Overheat fusing type safe lithium battery pack |
Also Published As
| Publication number | Publication date |
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| CN109080468B (en) | 2021-06-01 |
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Address after: No.66, Binhe North Road, high tech Development Zone, Luoyang City, Henan Province Patentee after: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Patentee after: AVIC Innovation Technology Research Institute (Jiangsu) Co.,Ltd. Address before: No.66, Binhe North Road, high tech Development Zone, Luoyang City, Henan Province Patentee before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Patentee before: Kaibo Energy Technology Co.,Ltd. Address after: No.66, Binhe North Road, high tech Development Zone, Luoyang City, Henan Province Patentee after: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Patentee after: Kaibo Energy Technology Co.,Ltd. Address before: No.66, Binhe North Road, high tech Development Zone, Luoyang City, Henan Province Patentee before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Patentee before: CHINA AVIATION LITHIUM BATTERY RESEARCH INSTITUTE Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220112 Address after: No.1 Jiangdong Avenue, Jintan District, Changzhou City, Jiangsu Province Patentee after: Zhongchuangxin Aviation Technology Co.,Ltd. Patentee after: AVIC Innovation Technology Research Institute (Jiangsu) Co.,Ltd. Address before: No.66, Binhe North Road, high tech Development Zone, Luoyang City, Henan Province Patentee before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. Patentee before: AVIC Innovation Technology Research Institute (Jiangsu) Co.,Ltd. |
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