CN106785128B - Unstability suppression equipment and battery - Google Patents
Unstability suppression equipment and battery Download PDFInfo
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- CN106785128B CN106785128B CN201710221585.3A CN201710221585A CN106785128B CN 106785128 B CN106785128 B CN 106785128B CN 201710221585 A CN201710221585 A CN 201710221585A CN 106785128 B CN106785128 B CN 106785128B
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- cavity
- temperature
- hole
- battery cell
- pressure sensing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The embodiment of the invention provides instability suppression equipment and a battery, wherein the instability suppression equipment is applied to a battery cell, and comprises a temperature detection device, a pressure sensing device, a trigger device, a cooling material and a transmission tube, wherein the temperature detection device is arranged on the battery cell and is connected with the pressure sensing device, the pressure sensing device is connected with the trigger device, two ends of the transmission tube are respectively connected with the battery cell and the trigger device, and the cooling material is arranged on the trigger device. The temperature detection device detects the temperature of the battery core and transmits the temperature to the pressure sensing device, and when the temperature reaches a threshold value, the pressure sensing device generates a pressure signal capable of triggering the triggering device so that the triggering device releases cooling materials, and the cooling materials reach the battery core along the transmission pipe to extinguish the fire of the battery core. The invention can rapidly detect the temperature of the battery cell and effectively avoid the problems of fire and the like caused by overhigh temperature of the battery cell.
Description
Technical Field
The invention relates to the technical field of battery application, in particular to a destabilization inhibition device and a battery.
Background
The inventor researches that, in the long-time use process of the existing battery or the battery core, heat accumulation may be caused by the fact that heat cannot be timely dispersed, and further the phenomenon of fire of the battery core or the battery is caused, so that how to solve the problem becomes a technical problem which needs to be solved by a person skilled in the art.
Disclosure of Invention
In view of the above, the invention provides a destabilization suppressing device and a battery, which can timely detect the temperature of a battery cell through ingenious design of the destabilization suppressing device, and avoid the fire phenomenon caused by overhigh temperature of the battery cell.
The preferred embodiment of the invention provides instability suppression equipment which is applied to a battery cell and comprises a temperature detection device, a pressure sensing device, a triggering device, a cooling material and a transmission pipe;
the temperature detection device is arranged on the battery cell and is connected with the pressure sensing device, the pressure sensing device is connected with the triggering device, two ends of the transmission pipe are respectively connected with the battery cell and the triggering device, and the cooling material is arranged on the triggering device;
the temperature detection device detects the temperature of the battery cell and transmits the temperature to the pressure sensing device, and when the temperature reaches a threshold value, the pressure sensing device generates a pressure signal which can trigger the triggering device so that the triggering device releases the cooling material, and the cooling material reaches the battery cell along the transmission pipe to perform fire extinguishing treatment on the battery cell.
In an alternative preferred embodiment of the present invention, the temperature detecting device includes a temperature sensing bulb and a capillary tube, the temperature sensing bulb is disposed on the electric core, and two ends of the capillary tube are respectively connected with the temperature sensing bulb and the pressure sensing device.
In a preferred embodiment of the present invention, the pressure sensing device includes a diaphragm, a valve rod, and a first cavity having an accommodating space, where a first through hole and a second through hole are formed in the first cavity;
the diaphragm set up in the first cavity, and make form two independent first cavity and second cavity in the first cavity, first through-hole is located first cavity, the second through-hole is located the second cavity, temperature-detecting device set up in first through-hole, valve rod one end with the diaphragm is connected, and pass the second through-hole with trigger device connects.
In an alternative preferred embodiment of the present invention, the pressure sensing device further includes a thermal expansion body, and the thermal expansion body is disposed in the first cavity and contacts the temperature detecting device.
In an alternative preferred embodiment of the present invention, a closed space is formed between the first cavity and the capillary tube.
In a preferred embodiment of the present invention, the triggering device includes a valve body, a connecting piece, and a second cavity having a receiving space, where the connecting piece is provided with a third through hole;
the second cavity is connected with the first cavity through the connecting piece, a notch is formed in one side, close to the second cavity, of the connecting piece, the valve body is arranged at the notch, and the valve rod can be contacted with the valve body through the third through hole.
In a preferred embodiment of the present invention, a fourth through hole is formed on one side of the connecting piece, the transmission pipe is disposed in the fourth through hole, and the cooling material can reach the battery cell along the notch, the fourth through hole and the transmission pipe in sequence.
In an alternative preferred embodiment of the present invention, the triggering device further includes an elastomer, and the elastomer is disposed on an inner wall of the second cavity, which is far from the connecting piece, and is connected with the valve body.
In an alternative preferred embodiment of the invention, the elastomer is a spring.
The preferred embodiment of the invention also provides a battery, which comprises a battery core and the instability suppression equipment, wherein the instability suppression equipment is arranged on the battery core.
According to the destabilization inhibition equipment and the battery provided by the embodiment of the invention, the temperature of the battery core is detected by the destabilization inhibition equipment through the temperature detection device, and when the temperature of the battery core reaches the threshold value, the temperature-reducing material is released to extinguish fire, so that the fire phenomenon caused by overhigh temperature of the battery core can be avoided in time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic block diagram of a battery according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a battery according to an embodiment of the present invention.
Fig. 3 is a schematic cross-sectional structure of a battery according to an embodiment of the present invention.
Fig. 4 is a schematic block structure diagram of a destabilizing suppression device according to an embodiment of the present invention.
Fig. 5 is a schematic cross-sectional view of the first chamber shown in fig. 2.
Fig. 6 is a schematic cross-sectional structure of the connection member shown in fig. 3.
Icon: 10-battery; 100-destabilizing suppression device; 110-a temperature detection device; 112-a bulb; 114-capillary; 120-pressure sensing means; 122-a first cavity; 1220-first via; 1222-a first cavity; 1224-a second via; 1226-a second cavity; 124-a membrane; 126-valve stem; 130-triggering means; 132-a connector; 1320-a third via; 1322-fourth through hole; 1324-notch; 134-valve body; 136-a second cavity; 138-an elastomer; 140-cooling material; 150-a transmission tube; 200-cell.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
Referring to fig. 1 and fig. 2 in combination, a schematic structural diagram and a schematic sectional structural diagram of a battery 10 according to an embodiment of the invention are shown, where the battery 10 includes a battery cell 200 and a instability suppression device 100, and the instability suppression device 100 is disposed on the battery cell 200. It should be noted that, on the premise of ensuring that the temperature detecting device 110 in the instability suppression device 100 can accurately detect the temperature of the battery cell 200 and that the temperature reducing material 140 reaches the battery cell 200 along the transmission pipe 150 when the temperature reaches the threshold value, the relative setting position of the instability suppression device 100 and the battery cell 200 is not limited herein.
Optionally, in this embodiment, the battery cell 200 may be a single battery cell 200, or may be a battery cell 200 module composed of a plurality of single battery cells 200, where the battery cell 200 is generally divided into three types, i.e. an aluminum-shell battery cell 200, a soft-package battery cell 200 (also referred to as "polymer battery cell 200"), and a cylindrical battery cell 200. In general, the battery 10 of the mobile phone adopts an aluminum shell battery cell 200, digital products such as bluetooth and the like mostly adopt a soft package battery cell 200, and the battery 10 of the notebook computer adopts serial-parallel combination of cylindrical battery cells 200. Here, the specific type of the battery cell 200 is not limited in this embodiment.
Further, referring to fig. 3 and 4 in combination, a schematic cross-sectional structure of the battery 10 and a schematic block structure of the instability suppression device 100 are provided for the present embodiment, where the instability suppression device 100 includes a temperature detecting device 110, a pressure sensing device 120, a triggering device 130, a cooling material 140 and a transmission pipe 150.
The temperature detecting device 110 is disposed on the electrical core 200 and connected to the pressure sensing device 120, the pressure sensing device 120 is connected to the triggering device 130, two ends of the transmission tube 150 are respectively connected to the electrical core 200 and the triggering device 130, and the cooling material 140 is disposed on the triggering device 130. The temperature detecting device 110 detects the temperature of the battery cell 200 and transmits the temperature to the pressure sensing device 120, and when the temperature reaches a threshold value, the pressure sensing device 120 generates a pressure signal capable of triggering the triggering device 130 so that the triggering device 130 releases the cooling material 140, and the cooling material 140 reaches the battery cell 200 along the transmission pipe 150 to perform fire extinguishing treatment on the battery cell 200.
Further, since the temperature detecting device 110 is used for detecting the temperature of the battery cell 200, the detected temperature is transmitted to the pressure sensing device 120. Therefore, in this embodiment, the temperature detecting device 110 may include a bulb 112 and a capillary tube 114, the bulb 112 is disposed on the electric core 200, two ends of the capillary tube 114 are respectively connected to the bulb 112 and the pressure sensing device 120, that is, one end of the capillary tube 114 is connected to the bulb 112, and the other end of the capillary tube 114 is connected to the pressure sensing device 120.
Optionally, the temperature sensing bulb 112 is used for detecting the temperature of the battery cell 200, and the working principle is that the temperature sensing bulb 112 is filled with a medium that expands when heated, and during the temperature rise of the battery cell 200, the medium in the temperature sensing bulb 112 expands continuously to generate a corresponding pressure, and the pressure is transmitted to the pressure sensing device 120 through the capillary tube 114. The medium may be a liquid or a gas, and the present embodiment is not limited thereto.
Optionally, the sizes, shapes, and materials of the temperature sensing bulb 112 and the capillary 114 may be flexibly set according to the usage of the battery cell 200, which is not limited in this embodiment.
Further, referring to fig. 5 in combination, the pressure sensing device 120 includes a diaphragm 124, a valve rod 126, and a first cavity 122 having a receiving space, and a first through hole 1220 and a second through hole 1224 are formed in the first cavity 122. The diaphragm 124 is disposed in the first cavity 122, and two independent first cavities 1222 and second cavities 1226 are formed in the first cavity 122, the first through hole 1220 is located in the first cavity 1222, the second through hole 1224 is located in the second cavity 1226, the temperature detecting device 110 is disposed in the first through hole 1220, and one end of the valve rod 126 is connected with the diaphragm 124 and passes through the second through hole 1224 to be connected with the triggering device 130. The sizes and shapes of the first through hole 1220, the second through hole 1224, the first cavity 1222 and the second cavity 1226 can be flexibly designed according to practical requirements.
Optionally, in this embodiment, the temperature detecting device 110 further transmits the pressure to the first cavity 122 through the capillary tube 114, and transmits the pressure to the diaphragm 124 in the first cavity 1222 through a first through hole 1220 provided on the first cavity 122, and as the temperature of the battery cell 200 increases, the pressure value that the diaphragm 124 receives and is conducted by the capillary tube 114 increases continuously, so as to press the diaphragm 124 to deform, so as to drive the valve rod 126 located in the second cavity 1226 to move, and trigger the triggering device 130 when the valve rod 126 moves to a predetermined position. The membrane 124 may be an elastic sheet, and is easy to deform under a force. It should be noted that in this embodiment, the diaphragm 124 deforms under pressure to displace the valve stem 126.
Optionally, in practical implementation, the connection manner between the membrane 124 and the first cavity 122 may be flexibly selected according to practical situations. For example, in the above embodiment, the diaphragm 124 is fixedly disposed between the first cavity 122. In addition, the diaphragm 124 may be movably disposed on the inner wall of the first cavity 122, so that the diaphragm 124 is displaced relative to the interior of the first cavity 122 under the compression of pressure, that is, as the pressure in the first cavity 1222 increases, the diaphragm 124 is displaced toward the second cavity 1226 as a whole, so that the space of the first cavity 1222 increases and the space of the second cavity 1226 decreases.
Optionally, in order to ensure that the pressure conducted into the first cavity 1222 through the capillary tube 114 is all applied to the diaphragm 124, in this embodiment, the first cavity 1222 is in communication with the capillary tube 114 through the first through hole 1220, and the space formed by the first cavity 1222 and the capillary tube 114 should be a closed space.
Further, the valve rod 126 is configured to trigger the triggering device 130 under the driving of the diaphragm 124, so that the diaphragm 124 and the valve rod 126 may be detachably or fixedly connected, and the shape, size, material, etc. of the valve rod 126 may be flexibly designed according to practical applications, which is not described in detail in this embodiment.
Further, in this embodiment, the triggering device 130 includes a valve body 134, a connecting member 132, and a second cavity 136 having a receiving space, and the connecting member 132 is provided with a third through hole 1320. The second cavity 136 is connected to the first cavity 1222 through the connecting member 132, specifically, as shown in fig. 6, a notch 1324 is disposed on a side of the connecting member 132 near the second cavity 136, the valve body 134 is disposed at the notch 1324, and the valve stem 126 may contact the valve body 134 through the third through hole 1320.
In practical implementation, the pressure sensing device 120 triggers the triggering device 130 through the valve rod 126, specifically, the valve rod 126 is driven by the diaphragm 124 to extend along the third through hole 1320 into the connecting piece 132, during the process that the pressure value in the first cavity 1222 is continuously increased, the valve rod 126 moves to the gap 1324 to contact with the valve body 134, and when the pressure value exceeds the threshold value, the valve body 134 is pressed out of the gap 1324, so that the cooling material 140 enters the transmission pipe 150 through the gap 1324. In this embodiment, the threshold may be set to 80 degrees.
Optionally, the connecting piece 132 is used to connect the first cavity 122 and the second cavity 136, and the valve rod 126 may reciprocate along the third through hole 1320, so the size, shape, and dimension of the connecting piece 132 and the third through hole 1320 are not limited in this embodiment if this condition is satisfied. It should be noted that the third through hole 1320 communicates with the notch 1324 and is shaped to mate with the valve stem 126.
Further, after the cooling material 140 is transferred to the battery cell 200 through the transfer tube 150, as the temperature of the battery cell 200 decreases, the pressure of the first cavity 1222 decreases, and after the valve rod 126 is far away from the valve body 134, in order to restore the valve body 134 to the original position again, that is, the valve body 134 is located at the notch 1324 again so that the notch 1324 is closed, in this embodiment, an end of the valve body 134, which contacts with the notch 1324, may be fixedly disposed on the bottom wall of the second cavity 136 through the elastic body 138, so that the valve body 134 may automatically return to the original position by using the expansion principle of the elastic body 138, so as to facilitate the reuse of the instability suppression device. Alternatively, in this embodiment, the elastic body 138 may be a spring.
In practical implementation, in order to ensure that the cooling material 140 can smoothly enter the transmission tube 150 through the notch 1324, a fourth through hole 1322 communicated with the notch 1324 is provided on one side of the connecting piece 132, and the transmission tube 150 is disposed in the fourth through hole 1322, so that the cooling material 140 can sequentially reach the battery cell 200 along the notch 1324, the fourth through hole 1322 and the transmission tube 150.
Further, since the cooling material 140 enters the transfer tube 150 along the path under the pressure, the transfer tube 150 may be fixedly disposed at the fourth hole 1322, so as to prevent the transfer tube 150 from falling off from the fourth hole 1322 when the cooling material 140 enters the transfer tube 150. It should be noted that in practical implementation, the present embodiment may be selected to use the transfer tube 150 with a smooth inner surface and no adhesion with the cooling material 140.
The transmission pipe 150 is used for transmitting the cooling material 140 to the battery cell 200, so in this embodiment, the material, size and length of the transmission pipe 150 are not limited.
It should be appreciated that, in practical implementation, in order to accelerate the temperature reduction of the battery cell 200, one end of the transmission tube 150, which is close to the battery cell 200, may be wrapped on the outer surface of the battery cell 200, but is not in contact with the outer surface of the battery cell 200, so as to increase the contact area between the cooling material 140 and the battery cell 200 as much as possible, and improve the cooling efficiency.
Further, in this embodiment, the cooling material 140 may be placed at the bottom of the second cavity 136, and after the valve rod 126 extrudes the valve body 134 from the notch 1324, the pressure in the second cavity 136 reaches a maximum value, so as to press the cooling material 140 to sequentially enter the fourth hole 1322 and the transmission tube 150 from the notch 1324 to reach the battery cell 200.
Alternatively, in this embodiment, the cooling material 140 is used to cool or extinguish the fire when the temperature reaches the threshold, and thus, the cooling material 140 may be a fire extinguishing material, a refrigerating material, for example, dry ice, etc., which is not limited in this embodiment.
In summary, according to the destabilization suppressing apparatus 100 and the battery 10 provided by the invention, through ingenious design and application of the destabilization suppressing apparatus 100, the temperature of the battery cell 200 can be detected in time, and the cooling material 140 is released when the temperature of the battery cell 200 reaches the threshold value, so that the fire phenomenon of the battery cell 200 possibly occurring due to heat accumulation in the use process is effectively avoided.
In the description of the present invention, the terms "configured," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The destabilization inhibition device is characterized by being applied to an electric core and comprising a temperature detection device, a pressure sensing device, a triggering device, a cooling material and a transmission pipe;
the temperature detection device is arranged on the battery cell and is connected with the pressure sensing device, the pressure sensing device is connected with the triggering device, two ends of the transmission pipe are respectively connected with the battery cell and the triggering device, and the cooling material is arranged on the triggering device;
the temperature detection device detects the temperature of the battery cell and transmits the temperature to the pressure sensing device, and when the temperature reaches a threshold value, the pressure sensing device generates a pressure signal capable of triggering the triggering device so that the triggering device releases the cooling material, and the cooling material reaches the battery cell along the transmission pipe to perform fire extinguishing treatment on the battery cell;
the temperature detection device comprises a temperature sensing bulb and a capillary tube, wherein the temperature sensing bulb is arranged on the electric core, one end of the capillary tube is connected with the temperature sensing bulb, and the other end of the capillary tube is connected with the pressure sensing device.
2. The destabilization suppression device according to claim 1, characterized in that the pressure sensing means comprises a diaphragm, a valve stem and a first cavity having a receiving space, the first cavity being provided with a first through hole and a second through hole;
the diaphragm set up in the first cavity, and make form two independent first cavity and second cavity in the first cavity, first through-hole is located first cavity, the second through-hole is located the second cavity, temperature-detecting device set up in first through-hole, valve rod one end with the diaphragm is connected, and pass the second through-hole with trigger device connects.
3. The destabilization suppression device of claim 2, wherein the first cavity forms a closed space with the capillary tube.
4. The destabilization suppressing apparatus according to claim 2, characterized in that the membrane is an elastic sheet.
5. The destabilization suppression device according to claim 2, characterized in that the triggering device includes a valve body, a connecting piece and a second cavity having a receiving space, the connecting piece being provided with a third through hole;
the second cavity is connected with the first cavity through the connecting piece, a notch is formed in one side, close to the second cavity, of the connecting piece, the valve body is arranged at the notch, and the valve rod can be contacted with the valve body through the third through hole.
6. The destabilizing suppression device according to claim 5, characterized in that a fourth through hole communicating with the notch is provided on one side of the connecting piece, the transmission pipe is provided in the fourth through hole, and the cooling material can reach the battery cell along the notch, the fourth through hole, the transmission pipe in order.
7. The destabilizing suppression device of claim 5, wherein the triggering device further comprises an elastomer disposed on an inner wall of the second cavity remote from the connection and connected to the valve body.
8. The destabilization suppression device of claim 7, wherein the elastomer is a spring.
9. A battery comprising a cell and the instability suppression device of any one of claims 1-8, the instability suppression device being disposed on the cell.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710221585.3A CN106785128B (en) | 2017-04-06 | 2017-04-06 | Unstability suppression equipment and battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710221585.3A CN106785128B (en) | 2017-04-06 | 2017-04-06 | Unstability suppression equipment and battery |
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| CN106785128A CN106785128A (en) | 2017-05-31 |
| CN106785128B true CN106785128B (en) | 2023-05-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108565366B (en) * | 2018-03-14 | 2023-12-01 | 华霆（合肥）动力技术有限公司 | Thermal management device and power supply device |
| CN111916596B (en) * | 2020-06-11 | 2022-07-26 | 安徽正熹标王新能源有限公司 | Battery protection device |
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| WO2012174781A1 (en) * | 2011-06-24 | 2012-12-27 | 中兴通讯股份有限公司 | Method, apparatus and terminal for adjusting terminal temperature |
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