CN106876811B - Leakage detecting device and battery module leakage detecting system - Google Patents
Leakage detecting device and battery module leakage detecting system Download PDFInfo
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- CN106876811B CN106876811B CN201710236600.1A CN201710236600A CN106876811B CN 106876811 B CN106876811 B CN 106876811B CN 201710236600 A CN201710236600 A CN 201710236600A CN 106876811 B CN106876811 B CN 106876811B
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- temperature control
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- 239000004020 conductor Substances 0.000 claims abstract description 63
- 239000000463 material Substances 0.000 claims abstract description 59
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 239000000700 radioactive tracer Substances 0.000 claims description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 18
- 229910002804 graphite Inorganic materials 0.000 claims description 18
- 239000010439 graphite Substances 0.000 claims description 18
- 239000012188 paraffin wax Substances 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 239000012466 permeate Substances 0.000 claims description 3
- 239000012782 phase change material Substances 0.000 claims description 3
- 238000004382 potting Methods 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 15
- 238000004891 communication Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001007 puffing effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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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
- H01M10/4228—Leak testing of cells or batteries
-
- 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
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
-
- 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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
-
- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Automation & Control Theory (AREA)
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a leakage detecting device and a battery module leakage detecting system. The battery module comprises a thermal management assembly, wherein the thermal management assembly is provided with a first cavity for containing a temperature control material, and a gap exists between the leakage detecting device and the bottom of the thermal management assembly. The leakage detecting device is provided with a leakage detecting component for containing conductive materials, two ends of the leakage detecting device are connected with an external power supply, and the external power supply and the conductive materials in the leakage detecting component form an electrical loop. When the thermal management component leaks, the temperature control material enters the leakage detection component for accommodating the conductive material along the side wall and the gap, and an external power supply is disconnected from an electrical loop formed by the conductive material in the leakage detection component so as to realize detection of leakage of the temperature control material in the thermal management component. Thereby reducing the risk of potential safety hazards and avoiding fatal, irrecoverable losses.
Description
Technical Field
The invention relates to the technical field of battery thermal management, in particular to a leakage detecting device and a battery module leakage detecting system.
Background
The battery thermal management technology solves the problem that the battery works in an environment with too high or too low temperature to cause heat dissipation or thermal runaway, and improves the overall performance of the battery.
However, if the cavity for performing thermal management on the battery is cracked or damaged, the temperature control material in the cavity can leak, so that a great potential safety hazard exists, and once the problem occurs, fatal and irrecoverable loss can be caused.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a leakage detecting device and a battery module leakage detecting system, wherein a second cavity filled with a conductive material is additionally arranged, and when a first cavity for thermal management leaks, a temperature control material can infiltrate into the second cavity filled with the conductive material through the edge of the first cavity to influence the conductivity of the conductive material, so that leakage detection is performed by detecting the conductivity of the conductive material.
The preferred embodiment of the invention provides a leakage detecting device which is applied to a battery module, wherein the battery module comprises a thermal management assembly, and the thermal management assembly is provided with a first cavity for accommodating a temperature control material;
the leakage detecting device is fixedly connected with the bottom of the thermal management assembly, a gap exists between the leakage detecting device and the bottom of the thermal management assembly, two ends of the leakage detecting device are connected with an external power supply, the leakage detecting device comprises a leakage detecting assembly for containing conductive materials, and the external power supply and the conductive materials in the leakage detecting assembly form an electrical loop;
when the heat management component leaks, the temperature control material flows out from the side wall of the heat management component, and enters the leakage detection component for accommodating the conductive material along the side wall and the gap to block an electrical loop formed by the external power supply and the conductive material in the leakage detection component so as to realize detection of leakage of the temperature control material in the heat management component.
In a preferred embodiment of the invention, the tracer apparatus comprises: the leakage detecting assembly is fixedly connected with the thermal management assembly, and the leakage detecting assembly is electrically connected with the external power supply through the lead.
In a preferred embodiment of the present invention, the tracer assembly comprises: the connection cavity is integrally formed with the second cavity, and the leakage detecting assembly is fixedly connected with the first cavity of the thermal management assembly through the connection cavity.
In the preferred embodiment of the invention, the second cavity is communicated with the connecting cavity, or a partition plate is arranged between the second cavity and the connecting cavity, and a liquid leakage gap which is convenient for the temperature control material to permeate into the second cavity is arranged on the partition plate.
In a preferred embodiment of the present invention, the density of the conductive material is less than the density of the temperature control material, the conductive material comprises graphite, and the temperature control material comprises paraffin.
In a preferred embodiment of the present invention, the leak detection assembly further includes a conductive sheet, the conductive material is uniformly laid in the second cavity, the conductive sheet is disposed at two ends of the second cavity, the conductive material contacts with the conductive sheet, and the conductive sheet is electrically connected with the external power supply through the conductive wire.
In a preferred embodiment of the present invention, the second cavity is provided with a second inlet for introducing the conductive material, and after the conductive material is introduced, the second inlet is closed to seal the second cavity.
The preferred embodiment of the invention also provides a battery module leakage detection system, which comprises a battery module, an external power supply and the leakage detection device;
the two ends of the leakage detecting device are electrically connected with the external power supply;
the battery module comprises a thermal management assembly and a plurality of single batteries, wherein the single batteries are fixed on two opposite side walls of the thermal management assembly, and the thermal management assembly is fixedly connected with the leakage detecting device.
In a preferred embodiment of the present invention, a temperature control material is disposed in a first cavity of the thermal management assembly, a conductive material is disposed in a second cavity of the tracer device, the temperature control material comprising: paraffin, phase change material and potting adhesive, wherein the conductive material comprises graphite.
In a preferred embodiment of the present invention, the first cavity is provided with a first inlet for introducing the temperature control material, and after the temperature control material is introduced, the first inlet is closed to seal the first cavity.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a leakage detecting device and a battery module leakage detecting system. The battery module comprises a thermal management assembly, wherein the thermal management assembly is provided with a first cavity for containing a temperature control material. The leakage detecting device is fixedly connected with the bottom of the thermal management assembly, a gap exists between the leakage detecting device and the bottom of the thermal management assembly, two ends of the leakage detecting device are connected with an external power supply, the leakage detecting device comprises a leakage detecting assembly used for containing conductive materials, and the external power supply and the conductive materials in the leakage detecting assembly form an electrical loop.
When the heat management component leaks, the temperature control material flows out from the side wall of the heat management component, and enters the leakage detection component for accommodating the conductive material along the side wall and the gap to block an electrical loop formed by the external power supply and the conductive material in the leakage detection component so as to realize detection of leakage of the temperature control material in the heat management component.
Thereby reducing the risk of potential safety hazards and avoiding fatal, irrecoverable losses.
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 block diagram of a battery module leakage detection system according to a preferred embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a battery module leakage detection system according to a preferred embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a connection between a leakage detecting device and a battery module according to a preferred embodiment of the present invention.
FIG. 4 is a schematic view of a thermal management assembly according to a first embodiment of the present invention.
FIG. 5 is a schematic diagram illustrating a second view of a thermal management assembly according to a preferred embodiment of the present invention.
FIG. 6 is a schematic diagram of a first view of a tracer according to a preferred embodiment of the invention.
FIG. 7 is a schematic diagram of a second view of a tracer according to a preferred embodiment of the invention.
FIG. 8 is a schematic diagram of a third view of a tracer according to a preferred embodiment of the invention.
Icon: 10-a battery module leak detection system; 100-tracer device; 110-a tracer assembly; 112-a second cavity; 113-a second inlet; 114-conductive material; 115-conductive sheet; 116-connecting the cavities; 118-separator; 1180-weeping gap; 120-conducting wires; 200-battery module; 210-a thermal management assembly; 212-a first cavity; 214-a first inlet; 216-slit grooves; 218-a receiving groove; 220-single battery; 300-external power source.
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.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "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.
Some embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
The present invention provides a battery module tracer system 10. Referring to fig. 1, fig. 1 is a block diagram of a battery module leakage detection system 10 according to a preferred embodiment of the invention. The battery module tracer system 10 includes: the leakage detecting device 100, the battery module 200 and the external power supply 300.
In this embodiment, two ends of the tracer apparatus 100 are electrically connected to the external power source 300. The battery module 200 is fixedly connected with the leakage detecting device 100.
Referring to fig. 2 and 3, fig. 2 is a schematic structural diagram of a battery module leakage detecting system 10 according to a preferred embodiment of the present invention, and fig. 3 is a schematic structural diagram of a leakage detecting device 100 connected to a battery module 200 according to a preferred embodiment of the present invention.
In this embodiment, the battery module 200 includes a thermal management assembly 210 and a plurality of unit cells 220, wherein the unit cells 220 are fixed on two opposite sidewalls of the thermal management assembly 210. The thermal management assembly 210 is provided with a first cavity 212 for accommodating a temperature control material, the tracer device 100 is fixedly connected to the bottom of the thermal management assembly 210, and a gap exists between the tracer device 100 and the bottom of the thermal management assembly 210. The tracer device 100 is provided with a second cavity 112 for accommodating the conductive material 114, two ends of the tracer device 100 are connected with an external power supply 300, and the external power supply 300 and the conductive material 114 in the second cavity 112 form an electrical loop.
In this embodiment, when the thermal management assembly 210 leaks, the temperature control material flows out from the side wall of the thermal management assembly 210, the temperature control material enters the second cavity 112 containing the conductive material 114 along the side wall and the gap, and the external power source 300 is disconnected from the electrical circuit formed by the conductive material 114 in the second cavity 112, so as to realize detection of leakage of the temperature control material in the thermal management assembly 210.
Referring to fig. 3 and 4, fig. 4 is a schematic structural diagram of a first view of a thermal management assembly 210 according to a preferred embodiment of the invention. The thermal management assembly 210 includes: the first cavity 212 is temperature controlled with material and the receiving cavity 218. The accommodating groove 218 is disposed on two sidewalls of the first cavity 212, and the plurality of unit batteries 220 are fixed in the accommodating groove 218.
In this embodiment, the temperature control material is disposed in the first cavity 212, and is configured to absorb heat of the unit cell 220, so as to control the temperature of the unit cell 220, and the temperature control material becomes liquid after absorbing heat.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a second view of a thermal management assembly 210 according to a preferred embodiment of the invention. In this embodiment, a slit groove 216 is formed at the bottom of the first cavity 212, and the slit groove 216 is formed during the process of integrally forming the first cavity 212 by blow molding. The first cavity 212 is a sealed structure, and the slit groove 216 is not communicated with the first cavity 212. The leaked temperature control material may flow into the second chamber 112 through the slit groove 216.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a first view of a tracer apparatus 100 according to a preferred embodiment of the invention. The tracer apparatus 100 includes: the tracer assembly 110 and the conductor 120. The tracer assembly 110 is fixedly connected with the thermal management assembly 210, both ends of the tracer assembly 110 are connected with the wires 120, and the tracer assembly 110 is electrically connected with the external power supply 300 through the wires 120.
In this embodiment, the tracer assembly 110 includes: the second cavity 112 and the conductive material 114. The conductive material 114 is laid in the second cavity 112.
In this embodiment, the density of the conductive material 114 is required to be less than the density of the temperature control material. When the edge sidewall of the first cavity 212 is cracked, the temperature control material leaks, and due to gravity, the temperature control material flows down into the second cavity 112 along the edge sidewall of the first cavity 212. Because the density of the temperature control material is higher than that of the conductive material 114, the temperature control material will be at the bottom of the second cavity 112 after penetrating into the second cavity 112, and the conductive material 114 floats on the temperature control material. Thus, the temperature control material blocks the electrical connection between the conductive material 114 and the external power source 300, and affects the conductivity of the conductive material 114.
In this embodiment, the conductive material 114 may be, but is not limited to, a material having conductive properties such as graphite. The temperature control material may be, but is not limited to, paraffin, phase change material, potting compound, etc. that can absorb heat of the unit cell 220 and has a density higher than that of the conductive material 114.
In this embodiment, the temperature control material is preferably paraffin wax having a density of about 0.9g/cm 3 . The conductive material 114 preferably comprises an expanded graphite having a density of about 0.002 to about 0.005g/cm 3 . The expanded graphite (Expanded Graphite, EG) is used as a novel functional carbon material, and is a loose and porous vermiform substance obtained by intercalation, washing, drying and high-temperature puffing of natural graphite flakes.
Expanded graphite has many excellent characteristics such as heat resistance, corrosion resistance, radiation resistance, electrical and thermal conductivity, self-lubricity, low coefficient of friction, and the like. When the expanded graphite is used in a non-oxidizing medium or inert gas at the temperature of between 200 ℃ below zero and 2500 ℃, the expanded graphite is not softened at high temperature and is not embrittled at low temperature, and especially, the expanded graphite is not in sealing failure caused by pressure, temperature alternation or vibration, and has more advantages than asbestos and rubber in heat resistance and oxidation resistance. The expanded graphite and the medium do not react chemically in a wide temperature, pressure and time range except a few medium with a specific concentration of a strong oxidant, and the expanded graphite is suitable for most inorganic acids, alkalis and salts. The expanded graphite can instantaneously expand 150-300 times of volume when meeting high temperature, and is changed into worm shape from flake shape, so that the structure is loose, porous and bent, the surface area is enlarged, the surface tension performance is improved, the force for absorbing flake graphite is enhanced, and the worm shape graphite can be embedded by itself, thus increasing the softness, rebound resilience and plasticity of the expanded graphite.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a second view of a tracer apparatus 100 according to a preferred embodiment of the invention. The tracer assembly 110 further includes a connection cavity 116, the connection cavity 116 and the second cavity 112 are integrally formed, and the tracer assembly 110 is fixedly connected with the first cavity 212 of the thermal management assembly 210 through the connection cavity 116.
In this embodiment, the second cavity 112 is in communication with the connection cavity 116, and the temperature control material directly flows into the second cavity 112 via the connection cavity 116.
Or, as shown in fig. 7, a partition plate 118 is disposed between the second cavity 112 and the connection cavity 116, and a liquid leakage gap 1180 is disposed on the partition plate 118 to facilitate the temperature control material to permeate into the second cavity 112, where the temperature control material flows into the connection cavity 116 and then flows into the second cavity 112 from the liquid leakage gap 1180. The weeping gap 1180 is defined corresponding to the location where the slot 216 of the thermal management assembly 210 is located.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a third view of a tracer apparatus 100 according to a preferred embodiment of the invention. The leak detection assembly 110 further includes a conductive sheet 115, the conductive material 114 is uniformly laid in the second cavity 112, the conductive sheet 115 is disposed at two ends of the second cavity 112, the conductive sheet 115 is electrically connected with the external power supply 300 through a wire 120, and the conductive material 114 contacts with the conductive sheet 115 to form an electrical circuit.
In this embodiment, when the temperature control material infiltrates into the bottom of the second cavity 112 and the conductive material 114 floats on the temperature control material, the temperature control material may prevent the conductive material 114 from contacting the conductive sheet 115, and the external power supply 300 is disconnected from the conductive sheet 115 and an electrical circuit formed by the conductive material 114, thereby realizing detection of leakage of the temperature control material in the thermal management assembly 210.
Referring to fig. 4 and 5 again, the first cavity 212 is provided with a first inlet 214 for introducing the temperature control material, and after the temperature control material is introduced, the first inlet 214 is sealed and closed, so that the first cavity 212 is sealed.
Referring to fig. 6 and 8 again, a second inlet 113 for introducing the conductive material 114 is formed in the second cavity 112. After the conductive material 114 is introduced into the second cavity 112, the second inlet 113 is sealed and closed, so that the second cavity 112 is closed.
In summary, the invention provides a leakage detecting device and a leakage detecting system of a battery module. The battery module comprises a thermal management assembly and a plurality of single batteries, wherein the single batteries are fixed on two opposite side walls of the thermal management assembly. The heat management component is provided with a first cavity for containing a temperature control material, the leakage detection device is fixedly connected with the bottom of the heat management component, and a gap exists between the leakage detection device and the bottom of the heat management component. The leakage detecting device is provided with a second cavity for containing conductive materials, two ends of the leakage detecting device are connected with an external power supply, and the external power supply and the conductive materials in the second cavity form an electrical loop.
When the thermal management component leaks, the temperature control material flows out from the side wall of the thermal management component, the temperature control material enters the second cavity for accommodating the conductive material along the side wall and the gap, and the external power supply is disconnected from an electrical loop formed by the conductive material in the second cavity, so that the detection of the leakage of the temperature control material in the thermal management component is realized. Therefore, the risk of potential safety hazards can be reduced, and fatal and irrecoverable losses are avoided.
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 (8)
1. The leakage detecting device is applied to a battery module and is characterized in that the battery module comprises a thermal management assembly, wherein the thermal management assembly is provided with a first cavity for containing a temperature control material;
the leakage detecting device is fixedly connected with the bottom of the thermal management assembly, a gap exists between the leakage detecting device and the bottom of the thermal management assembly, two ends of the leakage detecting device are connected with an external power supply, the leakage detecting device comprises a leakage detecting assembly for containing conductive materials, and the external power supply and the conductive materials in the leakage detecting assembly form an electrical loop;
when the thermal management component leaks, the temperature control material flows out of the side wall of the thermal management component, and enters the leakage detection component for accommodating the conductive material along the side wall and the gap to block an electrical loop formed by the external power supply and the conductive material in the leakage detection component so as to realize detection of the leakage of the temperature control material in the thermal management component;
the density of the conductive material is smaller than that of the temperature control material, the conductive material comprises graphite, and the temperature control material comprises paraffin;
the tracer assembly includes: the connection cavity is integrally formed with the second cavity, and the leakage detecting assembly is fixedly connected with the first cavity of the thermal management assembly through the connection cavity.
2. The apparatus of claim 1, wherein the tracer means comprises: the leakage detecting assembly is electrically connected with the external power supply through the lead.
3. The device according to claim 1, wherein the second cavity is communicated with the connecting cavity, or a partition plate is arranged between the second cavity and the connecting cavity, and a liquid leakage gap which is convenient for the temperature control material to permeate into the second cavity is arranged on the partition plate.
4. The apparatus of claim 2, wherein the tracer assembly further comprises conductive sheets, wherein the conductive material is uniformly laid in the second cavity, the conductive sheets are disposed at two ends of the second cavity, the conductive material is in contact with the conductive sheets, and the conductive sheets are electrically connected with the external power supply through the wires.
5. The device of claim 4, wherein the second cavity is provided with a second inlet for the conductive material, and the second inlet is closed to seal the second cavity after the conductive material is introduced.
6. A battery module tracer system, comprising a battery module, an external power source, and a tracer device according to any one of claims 1-5;
the two ends of the leakage detecting device are electrically connected with the external power supply;
the battery module comprises a thermal management assembly and a plurality of single batteries, wherein the single batteries are fixed on two opposite side walls of the thermal management assembly, and the thermal management assembly is fixedly connected with the leakage detecting device.
7. The system of claim 6, wherein a temperature control material is disposed within a first cavity of the thermal management assembly and a conductive material is disposed within a second cavity of the tracer device, the temperature control material comprising: paraffin, phase change material and potting adhesive, wherein the conductive material comprises graphite.
8. The system of claim 7, wherein the first cavity is provided with a first inlet for the temperature control material, and the first inlet is closed to seal the first cavity after the temperature control material is introduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710236600.1A CN106876811B (en) | 2017-04-12 | 2017-04-12 | Leakage detecting device and battery module leakage detecting system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710236600.1A CN106876811B (en) | 2017-04-12 | 2017-04-12 | Leakage detecting device and battery module leakage detecting system |
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| CN106876811A CN106876811A (en) | 2017-06-20 |
| CN106876811B true CN106876811B (en) | 2024-02-09 |
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