CN209559178U - Lithium battery thermal runaway deformation detection device - Google Patents
Lithium battery thermal runaway deformation detection device Download PDFInfo
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- CN209559178U CN209559178U CN201821955811.7U CN201821955811U CN209559178U CN 209559178 U CN209559178 U CN 209559178U CN 201821955811 U CN201821955811 U CN 201821955811U CN 209559178 U CN209559178 U CN 209559178U
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- lithium battery
- pressure sensitivity
- thermal runaway
- deformation detection
- detector cells
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Abstract
The utility model discloses lithium battery thermal runaway deformation detection devices, wherein: including deformation detection structure, deformation detection structure includes pressure sensitivity device, signal wire and external signal processor, the connection of one end of pressure sensitivity device and signal wire, the other end of signal wire connects external signal processor, pressure sensitivity device is mounted between lithium battery monomer or between lithium battery monomer and its outline border, when lithium battery monomer thermal runaway deforms, lithium battery monomer oppresses pressure sensitivity device, so that compressing pressure sensitivity device senses pressure, pressure signal can be transferred to external signal processor by signal wire by pressure sensitivity device.The utility model has the advantages of Effect on Detecting is good, can make a response to lithium battery early stage thermal runaway and provide the device of accurate alarm signal, fill up the technological gap of lithium battery thermal runaway deformation detection.
Description
Technical field
The invention belongs to the technical fields of lithium battery thermal runaway detection, and in particular to lithium battery thermal runaway deformation detection dress
It sets.
Background technique
Lithium battery thermal runaway detector is essential a part in lithium battery fire-fighting application, it has to lithium battery
It is monitored, detects, find the generation of lithium battery thermal runaway in time, once thermal runaway has occurred in lithium battery, just by lithium battery heat
Feature physical quantity out of control, such as temperature, smog, gas and radiation light intensity are converted into electric signal, and are acted immediately to fire report
Alert controller sends alarm signal.Especially thermal runaway deformation detector plays vital work in fire early warning
With especially in the region that human eye can not be directly observed, detector is particularly important.
But at present thermal runaway detector alternative on the market only just for the temperature generated after lithium battery thermal runaway,
The information such as gas and radiation light intensity are detected, and can not be judged to the early stage of lithium battery thermal runaway.And temperature, gas and
Radiation light intensity detector is easy to be interfered by environment, and accuracy rate is not high.Especially after thermal runaway occurs for lithium battery, embodiment is
The fever vaporization of electrolyte inside causes lithium battery monomer first to expand deformation, then just there is the evolution of detectable gas, then
Rise later for environment temperature, is only the generation of spark caused by thermal runaway later.Current detection of gas and temperature sensing mode
The mid-term stage that all thermal runaway can only occurs to lithium battery makes early warning, and can not make early warning to early stage thermal runaway.
Summary of the invention
That the technical problem to be solved by the present invention is to solve the above shortcomings of the prior art and to provide a kind of Effect on Detecting is good,
It can make a response to lithium battery early stage thermal runaway and the device of accurate alarm signal is provided, fill up lithium battery thermal runaway deformation detection
Technological gap lithium battery thermal runaway deformation detection device.
To realize the above-mentioned technical purpose, the technical scheme adopted by the invention is as follows:
Lithium battery thermal runaway deformation detection device, in which: including deformation detection structure, deformation detection structure includes pressure sensitivity dress
It sets, signal wire and external signal processor, one end connection of pressure sensitivity device and signal wire, the other end of signal wire connect outside
Signal processor, pressure sensitivity device is mounted between lithium battery monomer or between lithium battery monomer and its outline border, when lithium battery list
Body heat deformation out of control, lithium battery monomer oppress pressure sensitivity device, so that compressing pressure sensitivity device senses pressure, pressure sensitivity device can will be pressed
Force signal is transferred to external signal processor by signal wire.
To optimize above-mentioned technical proposal, the concrete measure taken further include:
Above-mentioned pressure sensitivity device is contact-making switch or piezoelectric transducer or pressure sensor, three's exclusive use or at least two
Kind is applied in combination.
Above-mentioned pressure sensitivity device is externally provided with protection shell, and pressure sensitivity device includes detector cells, detector cells circuit board
Quantity with detector touch panel, detector cells is at least one, and detector cells side is fixed on detector cells collection
At the one side of plate, detector touch panel is fixed on the other side of detector cells, and detector cells circuit board is fixed on protection
In shell, detector touch panel extend out to protection shell outside, detector touch panel fix or contact with lithium battery monomer or
Clearance fit, protection shell are fixedly connected with another lithium battery monomer or lithium battery monomer outline border.
Above-mentioned pressure sensitivity device is externally provided with protection shell, and pressure sensitivity device includes that detector cells and detector cells are integrated
The quantity of plate, detector cells is at least one, and detector cells side is fixed on the one side of detector cells circuit board, detection
Device unit circuit board is fixed in protection shell, and the detector cells other side is extend out to outside protection shell, with lithium battery monomer solid
Fixed or contact or clearance fit, protection shell are fixedly connected with another lithium battery monomer or lithium battery monomer outline border.
The current supply circuit of above-mentioned external signal processor control connection lithium battery monomer.
Above-mentioned external signal processor is connected with contact-making switch, and contact-making switch accesses the current supply circuit of lithium battery monomer,
External signal processor passes through the current supply circuit of contact-making switch on-off lithium battery monomer, and contact-making switch microswitch or film are opened
It closes.
Above-mentioned piezoelectric transducer is piezoelectric ceramics or piezo-electric generating piece.
Lithium battery thermal runaway deformation detection device of the invention, including pressure sensitivity device, protection shell, the elements such as signal wire and
Other auxiliary elements such as resistance, wherein pressure sensitivity device and signal wire are necessary, are protected used in shell and resistance and fixed resistance
Circuit board help out, selected depending on specific use environment and service condition.When in use, installation with battery cell it
Between or battery cell and its outline border between, wherein stress surface directly contacts or very close with battery cell side.Pressure sensitivity dress
It sets as detection core, can be contact-making switch, be also possible to piezoelectric transducer, be also possible to pressure sensor, three can be with
It is used alone, can also be applied in combination.After pressure sensitivity device is under pressure, circuit communication can be will be switched off, be also possible to by
To after pressure, the circuit of script connection is disconnected, specifically used to be determined by the requirement of external signal processor, external signal processing
Device can also connect warning device, and while control circuit disconnects, user's battery is informed in control warning device alarm in time
It breaks down.
Thermal runaway occurs for lithium ion battery thermal runaway deformation detector very good solution of the invention lithium ion battery
Early warning problem can be detected when lithium battery monomer, which first expands deformation, to be leaked there has been no gas by pressure sensitivity device
Corresponding measure is made according to the early warning of thermal runaway deformation detector to lithium battery thermal runaway, in time reduce lives and properties by
Threat degree.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of pressure sensitivity device.
Label therein are as follows: deformation detection structure 1, pressure sensitivity device 2, detector cells 21, detector cells circuit board 22,
Detector touch panel 23, signal wire 3, protection shell 4.
Specific embodiment
The embodiment of the present invention is described in further detail below in conjunction with attached drawing.
Lithium battery thermal runaway deformation detection device, in which: including deformation detection structure 1, deformation detection structure 1 includes pressure sensitivity
Device 2, signal wire 3 and external signal processor, pressure sensitivity device 2 are connect with one end of signal wire 3, the other end of signal wire 3
External signal processor is connected, pressure sensitivity device 2 is mounted between lithium battery monomer or between lithium battery monomer and its outline border, when
The deformation of lithium battery monomer thermal runaway, lithium battery monomer oppress pressure sensitivity device 2, so that compressing pressure sensitivity device 2 senses pressure, pressure sensitivity
Pressure signal can be transferred to external signal processor by signal wire 3 by device 2.
In embodiment, pressure sensitivity device 2 is contact-making switch or piezoelectric transducer or pressure sensor, and three is used alone or extremely
Few two kinds are applied in combination.These three sensors of contact-making switch/piezoelectric transducer/pressure sensor can be individually a kind of with any of them
Used aloned, can also be used in parallel with multiple same monomers, according to use occasion difference, according to certain algorithm, can be
One monomer issues signal and can determine whether, is also possible to reach Rule of judgment after several monomers issue signal.Pressure sensor
After by external pressure, analog electrical signal or pulse electrical signal or electric switch amount signal can be output to the outside.
In embodiment, pressure sensitivity device 2 is externally provided with protection shell 4, and pressure sensitivity device 2 includes detector cells 21, detector list
First circuit board 22 and detector touch panel 23, the quantity of detector cells 21 are at least one, and 21 side of detector cells is solid
It is scheduled on the one side of detector cells circuit board 22, detector touch panel 23 is fixed on the other side of detector cells 21, detection
Device unit circuit board 22 is fixed in protection shell 4, and detector touch panel 23 is extend out to outside protection shell 4, detector contact
Panel 23 is fixed or contacted with lithium battery monomer or clearance fit, protection shell 4 and another lithium battery monomer or lithium battery list
External frame is fixedly connected.
In embodiment, pressure sensitivity device 2 is externally provided with protection shell 4, and pressure sensitivity device 2 includes detector cells 21 and detector list
First circuit board 22, the quantity of detector cells 21 are at least one, and it is integrated that 21 side of detector cells is fixed on detector cells
The one side of plate 22, detector cells circuit board 22 are fixed in protection shell 4, and it is outer that 21 other side of detector cells extend out to protection
Outside shell 4, fixes or contact with lithium battery monomer or clearance fit, protection shell 4 and another lithium battery monomer or lithium battery list
External frame is fixedly connected.
In embodiment, the current supply circuit of external signal processor control connection lithium battery monomer.
In embodiment, external signal processor is connected with contact-making switch, and the power supply that contact-making switch accesses lithium battery monomer is returned
Road, external signal processor pass through the current supply circuit of contact-making switch on-off lithium battery monomer, contact-making switch microswitch or film
Switch.
In embodiment, piezoelectric transducer is piezoelectric ceramics or piezo-electric generating piece.
At least one detector cells 21, signal transmssion line connection are fixed on detector cells circuit board 22 of the invention
On detector cells circuit board 22, detector cells circuit board 22 can optionally integrate other auxiliary elements.Pressure sensitivity device 2 can
To be contact-making switch or piezoelectric transducer or pressure sensor
Be integrated into detector body according to several contact-making switches, pressure sensitivity device 2 be installed between lithium battery monomer or
Between lithium battery monomer and fixed frame, when thermal runaway deformation occurs for lithium battery, the extruding force that lithium battery deformation generates is acted on
In detector body, thus the circuit being connected with detector is opened or off, is sentenced to generate signal for control element
Disconnected foundation.
Be integrated into detector body using several piezoelectric transducers, pressure sensitivity device 2 be installed between lithium battery monomer or
Between lithium battery monomer and fixed frame, when thermal runaway deformation occurs for lithium battery, the extruding force that lithium battery deformation generates is acted on
In detector body, piezoelectric transducer generates piezoelectric effect, and corresponding different extruding force generates different voltage, externally output with
Judgment basis is provided.
Use several pressure sensors for detector body, pressure sensitivity device 2 is installed between lithium battery monomer or lithium electricity
Between pond monomer and fixed frame, when thermal runaway deformation occurs for lithium battery, the extruding force that lithium battery deformation generates acts on spy
Device main body is surveyed, pressure sensor exports different current/voltage signals according to the difference of extruding force to provide judgment basis.
Using several contact-making switch/piezoelectric transducer/pressure sensor hybrid combinings, pressure sensitivity device 2 is installed on lithium electricity
Between pond monomer or lithium battery monomer and fixed frame, when thermal runaway deformation, which occurs, for lithium battery generates extruding force, externally export
Corresponding on-off model/voltage signal/current signal is to provide judgment basis.
Originally it applies in example, 23 side of detector touch panel and lithium cells do face contact, side and detector cells collection
It contacts at the detector cells 21 on plate 22, is passed to the extruding force that lithium battery thermal runaway deforms by detector touch panel 23
Detector cells 21 pass through after the collection (screening when necessary by certain logical algorithm) of detector cells circuit board 22
Voltage or current signal outflow are carried out information with the external world and coupled by signal transmssion line 3.In addition, detector contact surface can not also be used
Plate is directly contacted with lithium cells with 21 pressure receiving plane of detector cells, power is directly acted on detector cells 21.
The above is only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment,
All technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
For those of ordinary skill, several improvements and modifications without departing from the principles of the present invention should be regarded as protection of the invention
Range.
Claims (7)
1. lithium battery thermal runaway deformation detection device, it is characterized in that: including deformation detection structure (1), the deformation detection knot
Structure (1) includes pressure sensitivity device (2), signal wire (3) and external signal processor, one end of pressure sensitivity device (2) and signal wire (3)
Connection, the other end of signal wire (3) connect external signal processor, the pressure sensitivity device (2) be mounted on lithium battery monomer it
Between or lithium battery monomer and its outline border between, when lithium battery monomer thermal runaway deform, lithium battery monomer oppress pressure sensitivity device
(2), so that compressing pressure sensitivity device (2) senses pressure, pressure signal can be passed through signal wire (3) by the pressure sensitivity device (2)
It is transferred to external signal processor.
2. lithium battery thermal runaway deformation detection device according to claim 1, it is characterized in that: the pressure sensitivity device (2)
For contact-making switch or piezoelectric transducer or pressure sensor, three is used alone or at least two are applied in combination.
3. lithium battery thermal runaway deformation detection device according to claim 1, it is characterized in that: the pressure sensitivity device (2)
It is externally provided with protection shell (4), pressure sensitivity device (2) includes detector cells (21), detector cells circuit board (22) and detector
The quantity of touch panel (23), the detector cells (21) is at least one, and detector cells (21) side is fixed on spy
The one side of device unit circuit board (22) is surveyed, detector touch panel (23) is fixed on the other side of detector cells (21), detects
Device unit circuit board (22) is fixed in protection shell (4), and detector touch panel (23) extend out to protection shell (4) outside, institute
The detector touch panel (23) stated is fixed or contacted with lithium battery monomer or clearance fit, protection shell (4) and another lithium
Battery cell or lithium battery monomer outline border are fixedly connected.
4. lithium battery thermal runaway deformation detection device according to claim 1, it is characterized in that: the pressure sensitivity device (2)
It is externally provided with protection shell (4), pressure sensitivity device (2) includes detector cells (21) and detector cells circuit board (22), described
The quantity of detector cells (21) is at least one, and detector cells (21) side is fixed on detector cells circuit board (22)
On one side, detector cells circuit board (22) is fixed in protection shell (4), and it is outer that detector cells (21) other side extend out to protection
Shell (4) is fixed or contacted outside, with lithium battery monomer or clearance fit, protection shell (4) and another lithium battery monomer or lithium electricity
Pond monomer outline border is fixedly connected.
5. lithium battery thermal runaway deformation detection device according to claim 1 or 2 or 3 or 4, it is characterized in that: described is outer
The current supply circuit of portion's signal processor control connection lithium battery monomer.
6. lithium battery thermal runaway deformation detection device according to claim 5, it is characterized in that: the external signal is handled
Device is connected with contact-making switch, and contact-making switch accesses the current supply circuit of lithium battery monomer, and external signal processor passes through contact-making switch
The current supply circuit of on-off lithium battery monomer, the contact-making switch microswitch or thin film switch.
7. lithium battery thermal runaway deformation detection device according to claim 2, it is characterized in that: the piezoelectric transducer is
Piezoelectric ceramics or piezo-electric generating piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821955811.7U CN209559178U (en) | 2018-11-26 | 2018-11-26 | Lithium battery thermal runaway deformation detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821955811.7U CN209559178U (en) | 2018-11-26 | 2018-11-26 | Lithium battery thermal runaway deformation detection device |
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| Publication Number | Publication Date |
|---|---|
| CN209559178U true CN209559178U (en) | 2019-10-29 |
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ID=68299412
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821955811.7U Active CN209559178U (en) | 2018-11-26 | 2018-11-26 | Lithium battery thermal runaway deformation detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540082A (en) * | 2018-11-26 | 2019-03-29 | 哲弗智能系统（上海）有限公司 | Lithium battery thermal runaway deformation detection device |
-
2018
- 2018-11-26 CN CN201821955811.7U patent/CN209559178U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540082A (en) * | 2018-11-26 | 2019-03-29 | 哲弗智能系统（上海）有限公司 | Lithium battery thermal runaway deformation detection device |
| WO2020108308A1 (en) * | 2018-11-26 | 2020-06-04 | 哲弗智能系统（上海）有限公司 | Lithium battery probe apparatus |
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