CN212586327U - System for monitoring battery expansion - Google Patents
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- CN212586327U CN212586327U CN202021149656.7U CN202021149656U CN212586327U CN 212586327 U CN212586327 U CN 212586327U CN 202021149656 U CN202021149656 U CN 202021149656U CN 212586327 U CN212586327 U CN 212586327U
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Abstract
The utility model provides a system for monitoring battery expansion, which comprises a control end; the interlayer is arranged between two adjacent battery cells; and the pressure sensor is electrically connected with the control end, is arranged between the adjacent interlayers and the battery monomer or between the adjacent two interlayers, and is in contact arrangement with the interlayers. Compared with the prior art, the utility model discloses a monitoring system is provided with pressure sensor and intermediate layer, can give the certain pressure of intermediate layer when the inside inflation of battery, and the intermediate layer and then with pressure transmission to pressure sensor in, the inflation condition by pressure sensor response battery transmits the monitoring result to the control end in, and then reminds the inside inflation condition of staff's battery to and react in time.
Description
Technical Field
The utility model relates to a lithium cell technical field, concretely relates to system for monitoring battery inflation.
Background
Lithium ion batteries have been commonly used in portable electrical appliances such as portable computers, video cameras, and mobile communications due to their unique performance advantages. The high-capacity lithium ion battery developed at present is tried out in electric automobiles, is expected to become one of main power sources of the electric automobiles in the 21 st century, and is applied to artificial satellites, aerospace and energy storage.
In the use process of the battery, due to various factors, abnormal reaction in the battery is caused, the internal pressure of the battery is increased, the battery shell is bound to be pressed, if the pressure cannot be released in time, explosion is likely to occur, and personal and property safety is harmed; the explosion phenomenon still exists in the current world battery products, and the situation about battery expansion and explosion is still not effectively solved.
In view of the above, it is necessary to provide a technical solution to the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: the system can monitor the expansion condition of the battery pack so as to timely and accurately solve the problem of battery expansion.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a system for monitoring battery expansion, comprising:
a control end;
the interlayer is arranged between two adjacent battery cells;
and the pressure sensor is electrically connected with the control end, is arranged between the adjacent interlayers and the battery monomer or between the adjacent two interlayers, and is in contact arrangement with the interlayers.
Preferably, the interlayer is at least one of a flame retardant coating, a thermal insulation coating, a metal plate, a plastic plate, foam and a rubber mat. This monitoring system's intermediate layer can possess multiple functions, can select the function intermediate layer according to the demand of reality, if can adopt thermal barrier coating, sets up this thermal barrier coating between two adjacent battery monomer, can be along with generating heat simultaneously when the battery is inside to appear expanding, adopts this thermal barrier coating not only to be favorable to protecting pressure sensor's stability, also can play certain radiating action simultaneously.
Preferably, the pressure sensors are arranged in a plurality of numbers and are respectively arranged between the adjacent interlayers and the battery cells or between the adjacent two interlayers.
Preferably, the pressure sensor is disposed in a middle region between the adjacent interlayers and the battery cell or in a middle region between two adjacent interlayers.
Preferably, the system further comprises an alarm electrically connected with the control end. The expansion result monitored by the pressure sensor and the result of measuring the fiber center wavelength drift amount are transmitted back to the control end together, and after the expansion result exceeds the pressure range value set in the control end, the control end starts an alarm to remind a worker to overhaul the battery pack so as to prevent accidents such as explosion and the like.
Preferably, a display screen for displaying the monitoring result is arranged on the control end.
Preferably, the system further comprises a laser unit and a linear optical fiber; the laser unit is electrically connected with the control end, the linear optical fiber is connected with the laser unit to form a communicated light path, and the linear optical fiber is arranged in the battery pack through the fixing components at two ends and is in contact with the surface of a part at the top of at least one battery monomer of the battery pack.
Preferably, the linear optical fiber is connected to the pressure sensor. When pressure sensor was provided with a plurality of, a plurality of pressure sensor equallyd divide and do not connect with the corresponding position of sharp optic fibre, pressure sensor can be used to monitor the inflation condition of electric core body, with pressure sensor and sharp optic fibre straight line connection, there is the detection reaction when pressure sensor, can give the certain stress of sharp optic fibre simultaneously, and then in passing the signal back laser unit, sharp optic fibre and pressure sensor work together and monitor the inflation condition of battery jointly, can further improve the accuracy of battery monomer inflation monitoring.
Preferably, the laser unit includes a DBR laser and a photoelectric demodulator, and the DBR laser and the photoelectric demodulator are respectively connected to the linear optical fiber and form a communicated optical path. The DBR laser is used for emitting laser signals, after the laser signals enter the linear optical fibers, the optical fibers can reflect the laser signals with specific wavelengths, the photoelectric demodulator processes the reflected laser signals, when the parts on the top of the battery cell expand, the optical fibers are stretched or compressed under the action of stress, and accordingly the central wavelength of the optical fibers drifts. The expansion monitoring of each battery monomer in the battery pack is preliminarily realized by measuring the drift amount of the central wavelength of the optical fiber, and the accuracy of the monitoring result is further improved.
Preferably, the two-end fixing assembly comprises a first positioning block and a second positioning block, a containing groove for containing the linear optical fiber is formed in the first positioning block and the second positioning block, and the linear optical fiber is fixed in the containing groove. The linear optical fiber is fixed through the positioning block, so that the optical fiber is always in a straightened state, the linear optical fiber is conveniently arranged on the surface of a component at the top of the battery monomer, and the linear optical fiber can quickly and accurately measure the expansion of the surface of each monomer of the whole battery pack.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1) the utility model discloses a monitoring system is provided with pressure sensor and intermediate layer, can give the certain pressure of intermediate layer when the inside inflation of battery, and the intermediate layer and then with pressure transmission to pressure sensor in, the inflation condition by pressure sensor response battery transmits the monitoring result to the control end in, and then reminds the inside inflation condition of staff's battery to and react in time.
2) The utility model provides an intermediate layer possesses multiple functions, can select interbedded material according to the actual demand of production, can play the efficiency of protection battery when detecting the battery inflation condition.
3) The utility model discloses a system still provides the expanded mode of another kind monitoring battery, through the size of the drift volume of measuring optic fibre center wavelength and then realize each free inflation monitoring of battery, with the pressurized condition through pressure sensor realize this kind of mode interact of inflation monitoring to the battery, both supplement each other, not only can realize the monitoring to the whole inflation condition of group battery, the volume expansion of single electric core in the group battery can also be monitored simultaneously, in order to reach in time, accurately handle the problem of battery inflation.
4) The linear optical fiber arranged in the utility model is arranged in the battery pack through the fixing components at the two ends and is in surface contact with the part at the top of the battery monomer, so that the volume of the device is reduced, and the device has the advantage of simple packaging; the arranged pressure sensors are reasonable in layout and act together with the linear optical fiber connection, potential safety hazards caused by battery monomers or battery packs with expansion exceeding limits are eliminated, the production quality of the batteries and the safety and reliability during use are improved, and the pressure sensors are suitable for large-batch industrial production at present.
Drawings
Fig. 1 is a schematic structural view of embodiment 1 of the present invention.
Fig. 2 is a schematic structural view of embodiment 2 of the present invention.
In the figure: 1-a control end; 11-a display screen; 2-a laser unit; 3-a linear optical fiber; 4-two end fixing components; 5-a pressure sensor; 6-an alarm; 7-a battery pack; 71-battery cell; 711-components on top of the cell; 8-interlayer.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the present invention and its advantageous effects will be described in further detail below with reference to the accompanying drawings of the detailed description and the specification, but the present invention is not limited thereto.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model discloses the standard part that uses all can purchase from the market, and dysmorphism piece all can be customized according to the description with the record of drawing of description, and the concrete connection mode of each part all adopts conventional means such as ripe bolt, rivet, welding among the prior art, and machinery, part and equipment all adopt prior art, and conventional model, including circuit connection adopts conventional connection mode among the prior art, does not detailed here again.
As shown in fig. 1, a system for monitoring battery swelling includes:
a control terminal 1;
interlayers 8, at least one interlayer 8 being disposed between two adjacent battery cells 71;
and the pressure sensor 5 is electrically connected with the control terminal 1, is arranged between the adjacent interlayers 8 and the battery cell 71 or between the two adjacent interlayers 8, and is arranged in contact with the interlayers 8.
Wherein, the interlayer 8 is at least one of a flame retardant coating, a heat insulation coating, a metal plate, a plastic plate, foam and a rubber mat. This monitoring system's intermediate layer 8 can possess multiple functions, can select function intermediate layer 8 according to the demand of reality, if can adopt thermal barrier coating, set up this thermal barrier coating between two adjacent battery monomer 71, can be accompanied with simultaneously generating heat when the battery is inside to appear expanding, adopt this thermal barrier coating not only to be favorable to protecting pressure sensor 5's stability, also can play certain radiating action simultaneously. In addition, in one battery pack 7, the pressure sensor 5 may be disposed between the adjacent interlayer 8 and the battery cell 71 and between the adjacent two interlayers 8, or only the pressure sensor 5 may be disposed between the interlayer 8 and the battery cell 71 or only between the adjacent two interlayers 8 in one battery pack 7.
Further, the pressure sensors 5 are provided in a plurality of numbers, and are respectively disposed between the adjacent interlayers 8 and the battery cells 71 or between the adjacent two interlayers 8.
Further, the pressure sensor 5 is disposed in a middle region between the adjacent sandwiching layers 8 and the battery cell 71 or in a middle region between the adjacent two sandwiching layers 8. That is, the pressure sensing part of the pressure sensor 5 contacts with the middle position of the opposite surface of the adjacent interlayer 8 and the battery cell 71 or the middle position of the opposite surface of the two interlayers 8, and can be connected with the control terminal 1 through a signal transmission line, so that the expansion pressure value of the pressure sensor 5 is transmitted to the control terminal 1, and the control terminal 1 can make a judgment.
Further, the system also comprises an alarm which is electrically connected with the control end 1. The expansion result monitored by the pressure sensor 5 and the result of measuring the fiber center wavelength drift amount are transmitted back to the control end 1 together, and after the expansion result exceeds the pressure range value set in the control end 1, the control end 1 starts an alarm to remind a worker to overhaul the battery pack 7 so as to prevent accidents such as explosion and the like.
Further, be provided with the display screen 11 that is used for showing the monitoring result on the control end 1 to make things convenient for the staff to look over every battery monomer 71's inflation condition fast, this system also is favorable to the quick location to battery monomer 71 inflation position simultaneously, and the staff of being convenient for quick replacement is expanded battery monomer 71, improves change efficiency.
As shown in fig. 2, unlike embodiment 1, this embodiment further includes a laser unit 2 and a linear optical fiber 3; the laser unit 2 is electrically connected with the control terminal 1, and the linear optical fiber 3 is connected with the laser unit 2 and forms a communicated optical path, is arranged in the battery pack 7 through the two-end fixing assembly 4, and is in surface contact with a component 711 on the top of at least one battery cell of the battery pack 7.
The linear optical fiber 3 can be made of one optical fiber, one end of the linear optical fiber 3 is fixed by a positioning block in the fixing components 4 at two ends and then is connected with the laser unit 2, and a communicated light path is formed between the laser unit 2 and the linear optical fiber 3; the other end of the linear optical fiber 3 is fixed by another positioning block and then exposed in the air. Specifically, the linear optical fiber 3 can be made of a single-mode optical fiber, so that the expansion condition of the battery can be conveniently monitored by the optical fiber.
Further, the linear optical fiber 3 is connected to a pressure sensor 5. When pressure sensor 5 is provided with a plurality of, a plurality of pressure sensor 5 are equallyd divide and are do not connected with the corresponding position of sharp optic fibre 3, pressure sensor 5 can be used to monitor the inflation condition of electric core body, with pressure sensor 5 and 3 sharp connections of sharp optic fibre, there is the detection reaction when pressure sensor 5, can give 3 certain stresses of sharp optic fibre simultaneously, and then return the signal in laser unit 2, the inflation condition of sharp optic fibre 3 and pressure sensor 5 combined action monitoring battery, can further improve the accuracy of battery monomer 71 inflation monitoring.
Further, the laser unit 2 includes a DBR laser and a photo-electric demodulator, both of which are respectively connected to the linear optical fiber 3 and form a communicating optical path. The DBR laser is used for emitting laser signals, after the laser signals enter the linear optical fiber 3, the optical fiber can reflect the laser signals with specific wavelength, the photoelectric demodulator processes the reflected laser signals, when the component 711 on the top of the battery monomer expands, the optical fiber is stretched or compressed under the action of stress, and the central wavelength of the optical fiber drifts accordingly. The expansion monitoring of each battery cell 71 in the battery pack 7 is primarily realized by measuring the drift amount of the central wavelength of the optical fiber, and the accuracy of the monitoring result is further improved. In particular, the DBR laser is a Distributed Bragg Reflector laser, Distributed Bragg Reflector, and the portion 711 of the top of the cell may be a tab.
Further, both ends fixed subassembly 4 includes first locating piece and second locating piece, offers the holding tank that is used for placing sharp optic fibre 3 on first locating piece and the second locating piece, and sharp optic fibre 3 is fixed in the holding tank. The linear optical fiber 3 is fixed by the positioning block, so that the optical fiber is always in a straightened state, the linear optical fiber 3 is conveniently arranged on the surface of the component 711 at the top of the battery cell, and the linear optical fiber 3 can quickly and accurately measure the expansion of the surface of each cell of the whole battery. Specifically, one end of the linear optical fiber 3 is fixed by the first positioning block and then connected with the laser unit 2, and the other end of the linear optical fiber 3 is fixed by the second positioning block and then exposed in the air.
The rest is the same as embodiment 1, and the description thereof is omitted.
The utility model discloses a theory of operation does: setting a pressure value in a proper range in the control end 1, electrically connecting the pressure sensor 5 with the control end 1 and transmitting the monitored battery expansion condition back to the control end 1, wherein the pressure sensor 5 mainly detects through pressure conduction induction of the interlayer 8, and then the control end 1 compares the numerical values of the pressure sensor 5 and the interlayer 8 to judge the battery expansion condition; and on the other hand, the laser signal is sent out by the DBR laser, the laser signal is transmitted into the linear optical fiber 3, the laser signal with the corresponding wavelength is reflected when passing through the linear optical fiber 3, the reflected laser signal is received by the photoelectric demodulator and is compared with the laser signal sent out by the DBR laser, then the comparison result is transmitted back to the control end 1, and the control end 1 judges the position of the corresponding linear optical fiber 3 according to the comparison result, so that the corresponding position of the single battery is further determined. The expansion of the battery cells can be measured by measuring the drift amount of the central wavelength of the optical fiber, the pressure sensor 5 is connected with the linear optical fiber 3, and when the pressure sensor 5 receives a certain pressure, the linear optical fiber 3 can be pulled and a certain stress is applied to the linear optical fiber 3, so that the expansion condition in the battery can be monitored more accurately.
Variations and modifications to the above-described embodiments may become apparent to those skilled in the art from the disclosure and teachings of the above description. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious modifications, replacements or variations made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A system for monitoring battery expansion, comprising:
a control terminal (1);
an interlayer (8), at least one interlayer (8) being arranged between two adjacent battery cells (71);
and the pressure sensor (5) is electrically connected with the control end (1), is arranged between the adjacent interlayers (8) and the battery cell (71) or between the adjacent two interlayers (8), and is in contact with the interlayers (8).
2. The system for monitoring battery expansion according to claim 1, wherein the interlayer (8) is at least one of a flame retardant coating, a thermal barrier coating, a metal plate, a plastic plate, foam and a rubber mat.
3. The system for monitoring battery swelling according to claim 1, wherein said pressure sensor (5) is provided in a plurality, respectively between adjacent said interlayers (8) and said battery cells (71) or between two adjacent said interlayers (8).
4. System for monitoring battery swelling according to claim 1 or 3, characterized in that the pressure sensor (5) is arranged in the middle area between the adjacent sandwich (8) and the battery cell (71) or in the middle area between two adjacent sandwich (8).
5. The system for monitoring battery swelling according to claim 1, further comprising an alarm (6) electrically connected to said control terminal (1).
6. The system for monitoring battery swelling according to claim 1, wherein a display screen (11) for displaying the monitoring result is provided on the control terminal (1).
7. The system for monitoring battery swelling according to claim 1, further comprising a laser unit (2) and a linear optical fiber (3); the laser unit (2) is electrically connected with the control end (1), the linear optical fiber (3) is connected with the laser unit (2) to form a communicated optical path, and is arranged in the battery pack (7) through the fixing components (4) at two ends and is in surface contact with a component (711) at the top of at least one battery cell of the battery pack (7).
8. System for monitoring battery swelling according to claim 7, characterized in that said linear optical fiber (3) is connected to said pressure sensor (5).
9. The system for monitoring battery swelling according to claim 7, wherein said laser unit (2) comprises a DBR laser and a photo-demodulator, each connected to and forming a communicating optical path with said linear optical fiber (3), respectively.
10. The system for monitoring battery swelling according to claim 7, wherein the two-end fixing assembly (4) comprises a first positioning block and a second positioning block, wherein a receiving groove for placing the linear optical fiber (3) is formed in the first positioning block and the second positioning block, and the linear optical fiber (3) is fixed in the receiving groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021149656.7U CN212586327U (en) | 2020-06-19 | 2020-06-19 | System for monitoring battery expansion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021149656.7U CN212586327U (en) | 2020-06-19 | 2020-06-19 | System for monitoring battery expansion |
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| CN212586327U true CN212586327U (en) | 2021-02-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113543543A (en) * | 2021-06-04 | 2021-10-22 | 安徽千航新能源科技有限公司 | Lithium battery test explosion-proof device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113543543A (en) * | 2021-06-04 | 2021-10-22 | 安徽千航新能源科技有限公司 | Lithium battery test explosion-proof device |
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