WO2020220887A1 - 电池模组以及电池包 - Google Patents
电池模组以及电池包 Download PDFInfo
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- WO2020220887A1 WO2020220887A1 PCT/CN2020/081769 CN2020081769W WO2020220887A1 WO 2020220887 A1 WO2020220887 A1 WO 2020220887A1 CN 2020081769 W CN2020081769 W CN 2020081769W WO 2020220887 A1 WO2020220887 A1 WO 2020220887A1
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- WIPO (PCT)
- Prior art keywords
- monitoring
- substrate
- battery
- battery module
- wire
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
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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
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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
- H01M10/482—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
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
- H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the cells
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/258—Modular batteries; Casings provided with means for assembling
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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
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/20—Pressure-sensitive devices
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
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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
Definitions
- This application relates to the field of battery technology, and in particular to a battery module and a battery pack.
- the embodiments of the present application provide a battery module and a battery pack, which can monitor the secondary battery in real time, and feedback the explosion signal in time when the secondary battery is thermally out of control, thereby improving the safety of the battery module during use.
- an embodiment of the present application proposes a battery module, which includes:
- Secondary batteries multiple secondary batteries are arranged side by side, and the secondary batteries have an explosion-proof valve
- the monitoring component is arranged above the secondary battery.
- the monitoring component includes a substrate and a monitoring wire, which is connected to the substrate; the monitoring wire is set corresponding to the position of each explosion-proof valve; when any explosion-proof valve explodes, the monitoring wire can be broken Open to monitor the status of the battery module.
- the battery module according to the embodiment of the present application can realize real-time monitoring of the state of the secondary battery by providing a monitoring component.
- the monitoring component includes a substrate and a monitoring wire.
- the monitoring wire itself constitutes a complete loop.
- the monitoring wire included in the monitoring component is fused or broken and disconnected.
- the monitoring wire cannot continue to transmit electrical signals, so as to timely feedback the explosion of the secondary battery Signal, so as to take timely safety intervention measures for the battery module to prevent the spread of high-temperature substances exploded by the secondary battery in time, and to improve the safety of the battery module during use.
- a battery pack which includes the battery module as in the foregoing embodiment.
- the number of battery modules is more than two, and the monitoring wires included in each of the two or more battery modules are connected in series.
- a battery pack which includes:
- the battery unit; the cover body is arranged above the battery unit; the monitoring component, the monitoring component is arranged on the cover body, the monitoring component includes a substrate and a monitoring wire, the monitoring wire is connected to the substrate; when the battery unit explodes, the monitoring wire can be disconnected to Realize the monitoring of the battery cell status.
- FIG. 1 is a schematic diagram of an exploded structure of a battery module according to an embodiment of the present application
- FIG. 2 is a schematic diagram of the structure of a monitoring component of an embodiment of the present application.
- FIG. 3 is a schematic structural diagram of a monitoring component according to another embodiment of the present application.
- Fig. 4 is a schematic structural diagram of a monitoring component according to another embodiment of the present application.
- FIG. 5 is a schematic cross-sectional structure diagram of a battery module according to an embodiment of the present application.
- Figure 6 is an enlarged view of A in Figure 5;
- Fig. 7 is a schematic partial cross-sectional view of a battery module according to an embodiment of the present application.
- FIG. 8 is a schematic cross-sectional structure diagram of a battery module according to another embodiment of the present application.
- Figure 9 is an enlarged view of B in Figure 8.
- FIG. 10 is a schematic diagram of an exploded structure of a battery pack according to an embodiment of the present application.
- FIG. 11 is a schematic diagram of an exploded structure of a battery pack according to another embodiment of the present application.
- Fig. 12 is a schematic diagram of the connection state of the cover and the monitoring component of an embodiment of the present application.
- Secondary battery; 11a center line; 111, explosion-proof valve;
- Monitoring component 121, substrate; 121a, receiving part; 122, monitoring wire; 122a, first section; 122b, second section; 122c, intermediate transition section; 123, insulating layer;
- X width direction
- Y thickness direction
- Z length direction
- an embodiment of the present application provides a battery module 1, which includes a plurality of secondary batteries 11 and a monitoring component 12.
- a plurality of secondary batteries 11 are arranged side by side to form a battery pack.
- Each secondary battery 11 has an explosion-proof valve 111.
- the explosion-proof valve 111 When the internal pressure of the secondary battery 11 exceeds a predetermined pressure, the explosion-proof valve 111 will explode to relieve the pressure, and at the same time, high-temperature substances such as high-temperature gas or high-temperature electrolyte will be ejected.
- the secondary battery 11 is a square battery.
- the shape of the explosion-proof valve 111 is a circle or a racetrack shape.
- the monitoring component 12 of this embodiment is arranged above the secondary battery 11.
- the monitoring component 12 includes a substrate 121 and a monitoring wire 122.
- the monitoring wire 122 is connected to the substrate 121, so that the substrate 121 provides a supporting force for the monitoring wire 122, which reduces the possibility that the position of the monitoring wire 122 will move downward to be electrically connected to the secondary battery 11.
- the monitoring wire 122 is set corresponding to the position of each explosion-proof valve 111. In a normal state, the monitoring wire 122 itself constitutes a complete electrical circuit as a whole.
- the high temperature or impact force generated by the explosion can act on the monitoring wire 122, so that the monitoring wire 122 is fused or cut by shearing force, so that the monitoring wire 122 is disconnected. Realize the monitoring of the status of the battery module 1.
- the battery module 1 of the embodiment of the present application implements real-time monitoring of the working state of the secondary battery 11 by providing a monitoring component 12.
- the monitoring wire 122 in the monitoring assembly 12 will be disconnected when subjected to high temperature or large impact force, so as to timely feedback the signal that the secondary battery 11 has exploded to facilitate the
- the battery module 1 adopts timely safety intervention measures to prevent the spread of high-temperature substances exploded by the secondary battery 11 in time, and can also serve as a warning to personnel and improve the safety of the battery module 1 during use.
- the battery module 1 further includes a battery management system (BMS, Battery management system).
- BMS Battery management system
- the monitoring wire 122 has two connection ends. The two connecting ends are respectively connected with the positive terminal and the negative terminal of the battery management system. In a normal state, the monitoring wire 122 will be energized, and current will flow. When the monitoring wire 122 is disconnected and it is in a disconnected state, the current flowing through the monitoring wire 122 will be cut off. After the battery management system detects the current change signal, it judges that the secondary battery 11 explodes and automatically intervenes in time or sends out an alarm signal.
- BMS Battery management system
- the number of secondary batteries 11 may be 2 to 50. Three or more secondary batteries 11 are electrically connected in series or series-parallel combination.
- the substrate 121 may be a mica plate, which has good brittleness and is easy to be broken when subjected to a large impact force.
- the base plate 121 may also be a plastic plate, which is easy to melt when subjected to high temperature, but is easy to break when subjected to a large impact force. In this way, when the secondary battery 11 explodes, the substrate 121 has a small blocking effect on high-temperature substances, which ensures that more high-temperature substances act on the monitoring wire 122 so that the monitoring wire 122 is quickly disconnected.
- the substrate 121 has a predetermined length, a predetermined width, and a predetermined thickness.
- the width direction X of the substrate 121 is the direction corresponding to the width
- the thickness direction Y of the substrate 121 is the direction corresponding to the thickness
- the length direction Z of the substrate 121 is the direction corresponding to the length.
- the thickness of the substrate 121 is 0.5 mm to 2 mm.
- the monitoring wire 122 has a first section 122a and a second section 122b arranged at intervals along the width direction X.
- the monitoring wire 122 also includes an intermediate transition section 122c connecting the first section 122a and the second section 122b.
- the first section 122a and the second section 122b are arranged corresponding to the positions of the explosion-proof valves 111.
- high-temperature substances can be ejected from the explosion-proof valve 111 and act on the first section 122a and/or the second section 122b to disconnect the first section 122a and/or the second section 122b.
- the first section 122a and the second section 122b can be mutually redundant, so that when the first section 122a is not disconnected, the second section 122b is disconnected to realize the monitoring function, or when the second section 122b is not disconnected, the second section 122b is disconnected.
- One segment 122a is disconnected to realize the monitoring function.
- the minimum distance between the first section 122a and the second section 122b is H (see FIG. 4), and the outer diameter of the monitoring wire 122 is D (see FIG. 6), where H/ D ⁇ 2.5.
- the minimum distance refers to the smallest value among all the distance values between the first section 122a and the second section 122b measured along the width direction X straight line.
- the minimum distance between the first segment 122a and the second segment 122b is too small.
- the melted first section 122a and/or the second section 122b may flow to each other, resulting in the fusing
- the electrical connection of the first section 122a and/or the second section 122b is restored, which in turn causes the monitoring function of the monitoring wire 122 to fail, and the signal that the secondary battery 11 has exploded cannot be fed back normally.
- the creepage distance between the first section 122a and the second section 122b is too short, so that the first section 122a and the second section 122b are easy to hit. Passing through, affecting normal monitoring.
- the material of the monitoring wire 122 may be aluminum, copper, tin, or the like.
- the cross-section of the monitoring wire 122 may be circular or polygonal.
- the outer diameter of the monitoring wire 122 is D, where 0.1mm ⁇ D ⁇ 2mm.
- the outer diameter of the monitoring wire 122 refers to the length of a straight line drawn through the center of the monitoring wire 122 on the cross section of the monitoring wire 122.
- the outer diameter refers to the diameter of the monitoring wire 122.
- the outer diameter refers to the maximum outer diameter, that is, the length of the longest straight line passing through the center of the cross section.
- the outer diameter of the monitoring wire 122 When the outer diameter of the monitoring wire 122 is less than 0.1 mm, its own impact resistance performance is low, and it is easily broken by the external impact force during the installation process, resulting in the failure of the monitoring wire 122 and the function of monitoring the secondary battery 11 cannot be realized.
- the outer diameter of the monitoring wire 122 is greater than 2mm, the monitoring wire 122 itself has too high resistance to high temperature and impact resistance, and it is difficult to be fused by high-temperature substances or broken by external impact, thereby reducing the monitoring sensitivity and causing the monitoring wire 122 to fail to pass the open circuit. In this way, the function of monitoring the secondary battery 11 is realized.
- the outer diameter of the monitoring wire 122 larger than 2 mm will occupy more installation space, thereby reducing the energy density of the battery module 1.
- the minimum distance H between the first section 122a and the second section 122b where 5mm ⁇ H ⁇ 50mm.
- the minimum distance H is less than 5 mm, the minimum distance between the first section 122a and the second section 122b is too small.
- the electrical connection of the first segment 122a and/or the second segment 122b is restored, which in turn causes the monitoring to fail.
- the minimum distance between the first section 122a and the second section 122b is too small, the creepage distance between the first section 122a and the second section 122b will be too short, so that the first section 122a and the second section 122b are easy for each other.
- the breakdown connection affects the monitoring wire 122 to perform the monitoring function normally.
- the minimum distance H is greater than 50mm, the distance between the first section 122a and the second section 122b is too large, so that the first section 122a and the second section 122b are far away from the center of the explosion-proof valve 111, and there will be a weakening of the explosion ejection.
- the high-temperature substance may directly act on the impact force on the first section 122a and the second section 122b.
- the high-temperature substance will be cooled due to the long transmission distance, so that it will act on the first section 122a and the second section 122b.
- the temperature is low.
- the first section 122a and the second section 122b may be difficult to be fused by the high-temperature substance or broken by external impact, resulting in the failure of the monitoring wire 122, and the function of monitoring the secondary battery 11 cannot be realized by disconnection.
- the explosion-proof valve 111 has a center line 11 a extending along the length direction Z of the base plate 121.
- the first section 122a and the second section 122b are respectively arranged on both sides of the center line 11a.
- the first section 122a and the second section 122b of the monitoring wire 122 extend along the length direction Z.
- the monitoring wire 122 has a U-shaped structure. The linear measurement is performed along the width direction X, and the distance between the first section 122a and the second section 122b measured at each position is equal.
- the first section 122a and the second section 122b have the same structure, and they are arranged in parallel.
- the first segment 122a and the second segment 122b are each inclined toward a direction away from each other, so that the distance between the two gradually decreases or increases along the length direction Z.
- the number of monitoring wires 122 in this embodiment may be more than two.
- Two or more monitoring wires 122 are arranged side by side in one direction, and all are arranged opposite to the explosion-proof valve 111. More than two monitoring wires 122 are mutually redundant. When the secondary battery 11 explodes, any one of the two or more monitoring wires 122 can monitor the state of the secondary battery 11, thereby helping to improve the accuracy of monitoring. When any one of the two or more monitoring wires 122 fails or does not work normally, the remaining monitoring wires 122 can complete the monitoring work normally, thereby reducing the possibility of missed judgment.
- the monitoring wire 122 is directly disposed on the surface of the substrate 121.
- the surface where the substrate 121 and the monitoring wire 122 are connected is a flat surface. The two are connected and fixed by snapping or bonding.
- a receiving portion 121a is provided on the substrate 121.
- the monitoring wire 122 is disposed in the receiving portion 121a.
- the overall shape of the monitoring wire 122 matches the shape of the receiving portion 121a.
- the receiving portion 121a also has a U-shaped structure.
- the accommodating portion 121a is arranged corresponding to the position of the explosion-proof valve 111.
- the monitoring wire 122 is housed in the accommodating portion 121a, so that on the one hand, it is beneficial to improve the compactness of the structure, save space, and increase the energy density of the battery module 1.
- the monitoring wire 122 is constrained by the insulating plate to improve its position The stability reduces the possibility that the position of the monitoring wire 122 is shifted and cannot maintain the corresponding state with the position of the explosion-proof valve 111, and reduces the possibility that high-temperature substances cannot act on the shifted monitoring wire 122 and cause monitoring failure.
- the receiving portion 121 a penetrates the substrate 121 along the thickness direction Y of the substrate 121.
- the accommodating portion 121a extends in the length direction Z.
- the monitoring wire 122 directly corresponds to the explosion-proof valve 111 of the secondary battery 11. When the secondary battery 11 explodes, the internal high-temperature substance can directly act on the monitoring wire 122, and quickly cause the monitoring wire 122 to fuse or be interrupted by external impact, so that the monitoring wire 122 is in a disconnected state. Conducive to shorten the monitoring time.
- the maximum dimension of the monitoring wire 122 in the thickness direction Y is smaller than the thickness of the substrate 121, and the monitoring wire 122 is disposed in the receiving portion 121a.
- the monitoring wire 122 is not exposed to the substrate 121, so that the substrate 121 can protect the monitoring wire 122 and reduce the possibility of accidental breaking of the monitoring wire 122 due to external impact during the assembly process or later use.
- the monitoring wire 122 does not occupy more installation space in the thickness direction Y, which improves the overall compactness of the monitoring assembly 12, thereby helping to increase the energy density of the battery module 1.
- the receiving portion 121 a is a groove recessed along the thickness direction Y of the substrate 121.
- the bottom wall of the groove does not penetrate the substrate 121.
- the substrate 121 can provide support for the monitoring wire 122 along the thickness direction Y.
- the monitoring wire 122 is not easy to escape from the groove.
- the substrate 121 of this embodiment will melt itself under the action of high temperature or be broken under the action of impact force.
- the groove extends along the length direction Z to form a strip-shaped groove.
- the monitoring wire 122 also has a strip structure as a whole, so as to match the shape of the groove.
- the monitoring component 12 further includes an insulating layer 123 that wraps the monitoring wire 122.
- the insulating layer 123 is filled in the receiving portion 121a.
- the monitoring wire 122 is connected to the substrate 121 through the insulating layer 123.
- the explosion-proof valve 111 explodes, the insulating layer 123 can be melted or broken.
- the insulating layer 123 can ensure that the monitoring wire 122 is insulated and isolated from the adjacent energized structure, and reduce the contact between the monitoring wire 122 and the adjacent energized structure to cause a short circuit.
- the insulating layer 123 can fill the gap between the monitoring wire 122 and the substrate 121, thereby improving the position stability of the monitoring wire 122.
- the insulating layer 123 can reduce the possibility of breakdown and short-circuiting of the first segment 122a and the second segment 122b.
- the high-temperature substance can first melt or shatter to expose the internal monitoring wire 122, and then the high-temperature substance will fuse or break the monitoring wire 122.
- the thickness of the insulating layer 123 is M, and the maximum outer diameter of the monitoring wire 122 is D, where 0.05 ⁇ M/D ⁇ 10.
- M/D is less than 0.05
- the thickness of the insulating layer 123 is too thin, and the insulation performance becomes poor, which increases the possibility of insulation failure.
- M/D is greater than 10
- the thickness of the insulating layer 123 is too thick, so that when the explosion-proof valve 111 explodes, high-temperature substances are easily blocked by the insulating layer 123, and it is not easy to quickly melt or break the insulating layer 123, prolonging the monitoring The monitoring time of the wire 122.
- the thickness value measured at any position of the insulating layer 123 is M.
- the portion of the insulating layer 123 disposed under the monitoring wire 122 has a thickness M along the thickness direction Y.
- linear measurement is performed on the portion of the insulating layer 123 disposed under the monitoring wire 122 to obtain the thickness value M.
- the thickness of the insulating layer 123 is M, where 0.1mm ⁇ M ⁇ 1mm.
- the material of the insulating layer 123 may be a polymer material such as polyethylene, polypropylene, or polyester, or ceramic or mica.
- the thickness of the insulating layer 123 may be 0.1 mm to 1 mm.
- the insulating performance of the insulating layer 123 is greater than 500M ⁇ . When the thickness of the insulating layer 123 is less than 0.1 mm, the insulation performance will be reduced, thereby increasing the possibility of a short circuit caused by the breakdown of the first segment 122a and the second segment 122b, a false alarm occurs, and the monitoring accuracy is reduced.
- the thickness of the insulating layer 123 is greater than 1 mm, the difficulty of melting or breaking of the insulating layer 123 increases, so that when the secondary battery 11 explodes, the insulating layer 123 fails to melt or break to expose the monitoring wire 122, thereby causing The first section 122a and the second section 122b cannot be disconnected, so that the monitoring cable group cannot normally complete the monitoring work, and it is impossible to determine that the secondary battery 11 has exploded.
- the monitoring component 12 further includes a protective plate 13.
- the protective plate 13 is provided on the side of the substrate 121 close to the secondary battery 11.
- the protective plate 13 can provide additional protection. When the secondary battery 11 explodes, the protective plate 13 can prevent high-temperature substances from diffusing outward, thereby improving the safety of the battery module 1.
- the protection plate 13 may be connected and fixed with the substrate 121, and the substrate 121 and the protection plate 13 are laminated in the thickness direction Y.
- the protective plate 13 is composed of high-temperature resistant and high-strength insulating materials such as mica, ceramics, composite materials, and the like.
- the substrate 121 and the protective plate 13 are bonded by a high temperature resistant adhesive such as silicone glue, high temperature epoxy glue, organic silicon, phenolic aldehyde, etc.
- the monitoring component 12 further includes an isolation plate 14.
- the separator 14 is disposed on the side of the substrate 121 away from the secondary battery 11.
- the isolation plate 14 isolates the secondary battery 11 and the monitoring assembly 12.
- the isolation plate 14 may be connected and fixed with the substrate 121, and the substrate 121 and the protection plate 13 are laminated in the thickness direction Y.
- the isolation plate 14 is composed of insulating materials such as mica or plastic.
- the substrate 121 and the isolation plate 14 are bonded by a high temperature resistant adhesive such as silicone glue, high temperature epoxy glue, organic silicon, phenolic type, etc.
- the battery module 1 of the embodiment of the present application can realize real-time monitoring of the state of the secondary battery 11 by providing a monitoring component 12.
- the monitoring component 12 includes a substrate 121 and a monitoring wire 122.
- the monitoring wire 122 itself constitutes a complete loop.
- the monitoring wire 122 included in the monitoring assembly 12 is fused or broken and disconnected.
- the monitoring wire 122 cannot continue to transmit electrical signals, so that the secondary battery is fed back in time 11 is a signal of explosive spray, so as to take timely safety intervention measures for the battery module 1 to prevent the spread of high-temperature substances from the explosive spray of the secondary battery 11 and improve the safety of the battery module 1 during use.
- an embodiment of the present application further provides a battery pack 2 including the battery module 1 of the foregoing embodiments.
- the number of battery modules 1 is more than two.
- the monitoring wires 122 included in each of the two or more battery modules 1 are connected in series. After all the monitoring wires 122 are connected in series, they are connected to the positive terminal and the negative terminal of the battery management system through the total input terminal and the total output terminal, so that each battery module 1 is monitored in real time.
- the battery pack 2 of the embodiment of the present application can realize real-time monitoring of the state of the battery module 1 through the monitoring component 12.
- the monitoring wire 122 included in the monitoring assembly 12 is fused or broken and disconnected.
- the monitoring wire 122 cannot continue to transmit electrical signals, so as to feed back the battery module in time 1.
- the signal of explosion ejection occurs, so as to take safety intervention measures for the battery pack 2 in time to prevent the spread of high-temperature materials from the explosion ejection of the battery module 1 and improve the safety of the battery pack 2 during use.
- the battery pack 2 further includes a box body 21 and a cover body 22.
- the box body 21 has an accommodating cavity for accommodating the battery module 1.
- the battery module 1 is put into the containing cavity of the box body 21, and finally the box body 21 and the cover body 22 are connected and fixed.
- the embodiment of the present application further provides a battery pack 3, which includes a battery unit 31, a cover 22, and a monitoring assembly 12.
- the cover 22 is provided above the battery unit 31.
- the monitoring component 12 is disposed on the cover 22.
- the monitoring component 12 includes a substrate 121 and a monitoring wire 122.
- the monitoring wire 122 is connected to the substrate 121. When the battery cell 31 explodes, the monitoring wire 122 can be disconnected to monitor the state of the battery cell 31.
- the battery unit 31 may be a single secondary battery 11, the battery module 1 of the above-mentioned embodiments, or a battery module in the prior art.
- the substrate 121 of the monitoring component 12 and the cover 22 are adhesively connected.
- the substrate 121 and the cover 22 are bonded by a high temperature resistant adhesive such as silicone glue, high temperature epoxy glue, silicone, phenolic.
- the battery pack 3 further includes a box 21.
- the box body 21 has an accommodating cavity for accommodating the battery unit 31.
- the battery unit 31 is put into the containing cavity of the box body 21, and finally the box body 21 and the cover body 22 are connected and fixed.
- the battery pack 3 of the embodiment of the present application can realize real-time monitoring of the state of the battery unit 31 by setting the monitoring component 12.
- the monitoring component 12 includes a substrate 121 and a monitoring wire 122.
- the monitoring wire 122 itself constitutes a complete loop.
- the monitoring wire 122 included in the monitoring assembly 12 is fused or broken and disconnected.
- the monitoring wire 122 cannot continue to transmit electrical signals, so that the battery cell 31 is fed back in time.
- the burst spray signal is used to take safety intervention measures for the battery pack 3 in time to prevent the spread of high temperature substances exploded by the battery unit 31 and improve the safety of the battery pack 3 during use.
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- Chemical Kinetics & Catalysis (AREA)
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
一种电池模组(1)以及电池包(3)。电池模组(1)包括:二次电池(11),多个二次电池(11)并排设置,二次电池(11)具有防爆阀(111);监测组件(12),监测组件(12)设置于二次电池(11)的上方,监测组件(12)包括基板(121)以及监测导线(122),监测导线(122)与基板(121)连接;监测导线(122)与各个防爆阀(111)位置对应设置;任意一个防爆阀(111)发生爆喷时,监测导线(122)能够断开,以实现对电池模组(1)状态的监测。所述电池模组(1)能够实时监测二次电池(11),在二次电池(11)发生热失控时,及时反馈爆喷信号,提高电池模组(1)使用过程的安全性。
Description
相关申请的交叉引用
本申请要求享有于2019年04月30日提交的名称为“电池模组以及电池包”的中国专利申请201910359968.6的优先权,该申请的全部内容通过引用并入本文中。
本申请涉及电池技术领域,特别是涉及一种电池模组以及电池包。
目前,随着在二次电池中的能量密度越来越高,市场对电池安全性的需求越来越高。在二次电池使用过程中会发生热失控,从而导致局部形成高温环境,具有较大破坏力,严重时可能烧穿电池箱上盖而引发火灾,然而由于不能够及时地检测到二次电池发生热失控,因此会造成极大的安全事故。
发明内容
本申请实施例提供一种电池模组以及电池包,能够实时监测二次电池,在二次电池发生热失控时,及时反馈爆喷信号,提高电池模组使用过程的安全性。
一方面,本申请实施例提出了一种电池模组,其包括:
二次电池,多个二次电池并排设置,二次电池具有防爆阀;
监测组件,监测组件设置于二次电池的上方,监测组件包括基板以及监测导线,监测导线与基板连接;监测导线与各个防爆阀位置对应设置;任意一个防爆阀发生爆喷时,监测导线能够断开,以实现对电池模组状态的监测。
根据本申请实施例的电池模组能够通过设置监测组件来实现对二次电池的状态进行实时监测。监测组件包括基板和监测导线。监测导线自身构成完整回路。在二次电池发生爆喷喷出高温物质时,监测组件所包括的监测导线被熔断或冲断而断开,此时监测导线内部无法继续传递电信号,从而及时反馈二次电池发生爆喷的信号,以便于对电池模组及时采取安全干预措施及时遏制二次电池爆喷的高温物质蔓延,提高电池模组使用过程的安全性。
另一个方面,根据本申请实施例提供一种电池包,其包括如上述实施例的电池模组。
根据本申请实施例的另一个方面,电池模组的数量为两个以上,两个以上电池模组各自所包括的监测导线串联连接。
再一个方面,根据本申请实施例提供一种电池包,其包括:
电池单元;盖体,设置于电池单元上方;监测组件,监测组件设置于盖体,监测组件包括基板以及监测导线,监测导线与基板连接;电池单元发生爆喷时,监测导线能够断开,以实现对电池单元状态的监测。
下面将通过参考附图来描述本申请示例性实施例的特征、优点和技术效果。
图1是本申请一实施例的电池模组的分解结构示意图;
图2是本申请一实施例的监测组件的结构示意图;
图3是本申请另一实施例的监测组件的结构示意图;
图4是本申请再一实施例的监测组件的结构示意图;
图5是本申请一实施例的电池模组的剖视结构示意图;
图6是图5中A处放大图;
图7是本申请一实施例的电池模组的局部剖视结构示意图;
图8是本申请另一实施例的电池模组的剖视结构示意图;
图9是图8中B处放大图;
图10是本申请一实施例的电池包的分解结构示意图;
图11是本申请另一实施例的电池包的分解结构示意图;
图12是本申请一实施例的盖体和监测组件的连接状态示意图。
在附图中,附图并未按照实际的比例绘制。
标记说明:
1、电池模组;
11、二次电池;11a、中心线;111、防爆阀;
12、监测组件;121、基板;121a、容纳部;122、监测导线;122a、第一段;122b、第二段;122c、中间过渡段;123、绝缘层;
13、防护板;
14、隔离板;
2、电池包;
21、箱体;
22、盖体;
3、电池包;
31、电池单元;
X、宽度方向;Y、厚度方向;Z、长度方向。
下面结合附图和实施例对本申请的实施方式作进一步详细描述。以下实施例的详细描述和附图用于示例性地说明本申请的原理,但不能用来限制本申请的范围,即本申请不限于所描述的实施例。
在本申请的描述中,需要说明的是,除非另有说明,“多个”的含义是两个以上;术语“上”、“下”、“左”、“右”、“内”、“外”等指示的方位或位置关系仅是为了便于描述本申请和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本申请的限制。此外,术语“第一”、“第二”、“第三”等仅用于描述目的,而不能理解为指示或暗示相对重要性。
下述描述中出现的方位词均为图中示出的方向,并不是对本申请具体结构进行限定。在本申请的描述中,还需要说明的是,除非另有明确的规 定和限定,术语“安装”、“相连”、“连接”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是直接相连,也可以通过中间媒介间接相连。对于本领域的普通技术人员而言,可视具体情况理解上述术语在本申请中的具体含义。
为了更好地理解本申请,下面结合图1至图12对本申请实施例进行详细描述。
一方面,参见图1所示,本申请实施例提供一种电池模组1,其包括多个二次电池11和监测组件12。多个二次电池11并排设置以形成电池组。每个二次电池11具有防爆阀111。二次电池11内部压力超过预定压力时,防爆阀111会发生爆喷以泄压,同时会伴随高温物质喷出,例如高温气体或高温电解液。在一个示例中,二次电池11为方形电池。防爆阀111的形状为圆形或跑道形。
本实施例的监测组件12设置于二次电池11的上方。参见图2至图4所示,监测组件12包括基板121以及监测导线122。监测导线122与基板121连接,从而基板121为监测导线122提供支承力,降低监测导线122的位置发生下移而与二次电池11发生电连接的可能性。监测导线122与各个防爆阀111位置对应设置。正常状态下,监测导线122自身整体构成一个完整的电回路。任意一个防爆阀111发生爆喷时,爆喷产生的高温或冲击力能够作用于监测导线122,以使监测导线122发生熔断或受到剪切力而被切断,从而监测导线122断开,以此实现对电池模组1状态的监测。
本申请实施例的电池模组1通过设置监测组件12来实现对二次电池11的工作状态进行实时监测。在二次电池11发生爆喷情况时,监测组件12内的监测导线122受到高温作用或较大冲击力作用时会发生断开,从而及时反馈二次电池11发生爆喷的信号,以便于对电池模组1及时采取安全干预措施,及时遏制二次电池11爆喷的高温物质蔓延,同时也能够对人员起到警示作用,提高电池模组1使用过程的安全性。
在一个实施例中,电池模组1还包括电池管理***(BMS,Battery management system)。监测导线122具有两个连接端部。两个连接端部分别与电池管理***的正极端子和负极端子相连接。正常状态下,监测导线122上会通电,从而有电流通过。当监测导线122发生断开,自身处于断路状态时,流过监测导线122的电流会被切断。电池管理***监测到电流变化信号后,判断二次电池11发生爆喷,并及时自动实施干预或向外发出报警信号。
在一个实施例中,二次电池11的数量可以为2个至50个。三个以上的二次电池11通过电连接进行串联或串并联组合。
在一个实施例中,基板121可以是云母板,自身脆性好,在受到较大冲击力时易于破碎。基板121也可以是塑料板,在受到高温时易于熔化,而在受到较大冲击力时易于破碎。这样,在二次电池11发生爆喷时,基板121对高温物质的阻挡作用小,保证高温物质更多地作用于监测导线122以使监测导线122快速地断开。基板121具有预定长度、预定宽度和预定厚度。在各个实施例中,基板121的宽度方向X是宽度所对应的方向,基板121的厚度方向Y是厚度所对应的方向,基板121的长度方向Z是长度所对应的方向。可选地,基板121的厚度为0.5mm至2mm。
在一个实施例中,参见图4所示,监测导线122具有沿宽度方向X间隔设置的第一段122a和第二段122b。监测导线122还包括连接第一段122a和第二段122b的中间过渡段122c。第一段122a和第二段122b与各个防爆阀111位置对应设置。二次电池11爆喷时,高温物质可以从防爆阀111喷出并作用于第一段122a和/或第二段122b,以使第一段122a和/或第二段122b断开。第一段122a和第二段122b可以互为冗余,从而在第一段122a未断开时,第二段122b发生断开以实现监测功能,或者,第二段122b未断开时,第一段122a发生断开以实现监测功能。在一个示例中,第一段122a和第二段122b之间的最小间距为H(参见图4所示),而监测导线122的外径为D(参见图6所示),其中,H/D≥2.5。最小间距指的是沿宽度方向X直线测量出第一段122a和第二段122b之间的所有间距值中的最小值。在H/D小于2.5时,第一段122a和第二段122b之间的最小间距过小。这样,在第一段122a和/或第二段122b由于高温发 生熔化的情况下,熔化后的第一段122a和/或第二段122b存在熔融物质流向彼此的可能性,从而导致熔断后的第一段122a和/或第二段122b重新恢复电连接,进而导致监测导线122监测功能失效,无法正常反馈二次电池11已发生爆喷的信号。另外,第一段122a和第二段122b之间的最小间距过小会导致第一段122a和第二段122b之间的爬电距离过短,从而第一段122a和第二段122b易于击穿连通,影响正常监测。
在一个示例中,监测导线122的材料可以是铝、铜或锡等。监测导线122的横截面可以是圆形或多边形。监测导线122的外径为D,其中,0.1mm≤D≤2mm。监测导线122的外径指的是对监测导线122的横截面上通过监测导线122中心所做的直线的长度值。监测导线122的横截面为圆形时,该外径指的是监测导线122的直径。监测导线122的横截面是多边形时,该外径指的是最大外径,也即通过横截面中心的最长的直线的长度值。监测导线122的外径小于0.1mm时,自身抗冲击力性能低,容易在安装过程中被外部冲击力冲断,从而导致监测导线122失效,无法实现监测二次电池11的功能。监测导线122的外径大于2mm时,监测导线122自身抗高温和抗冲击力性能过高,从而难于被高温物质熔断或被外部冲击力冲断,从而降低监测灵敏度,导致监测导线122无法通过断路方式实现监测二次电池11的功能。同时监测导线122的外径大于2mm会占用更多的安装空间,从而降低电池模组1的能量密度。第一段122a和第二段122b之间的最小间距H,其中,5mm≤H≤50mm。在最小间距H小于5mm时,第一段122a和第二段122b之间的最小间距过小。这样,在第一段122a和/或第二段122b由于高温发生熔化的情况下,熔化后的第一段122a和/或第二段122b存在熔融物质流向彼此的可能性,从而导致熔断后的第一段122a和/或第二段122b重新恢复电连接,进而导致监测失效。另外,第一段122a和第二段122b之间的最小间距过小会导致第一段122a和第二段122b之间的爬电距离过短,从而第一段122a和第二段122b彼此易于击穿连通,影响监测导线122正常执行监测功能。在最小间距H大于50mm时,第一段122a和第二段122b之间的间距过大,从而第一段122a和第二段122b距离防爆阀111的中心较远,会存在减弱爆 喷出的高温物质直接作用于第一段122a和第二段122b上冲击力的可能性,也会存在高温物质因传递距离较远而被冷却降温,使得作用于第一段122a和第二段122b时的温度偏低。这样,第一段122a和第二段122b存在难于被高温物质熔断或被外部冲击力冲断的可能性,从而导致监测导线122失效,无法通过断开方式实现监测二次电池11的功能。
在一个实施例中,参见图1所示,防爆阀111具有沿基板121的长度方向Z延伸的中心线11a。第一段122a和第二段122b分别设置于中心线11a的两侧。可选地,监测导线122的第一段122a和第二段122b沿长度方向Z延伸。在一个示例中,监测导线122呈U形结构。沿宽度方向X进行直线式测量,第一段122a和第二段122b之间在各个位置测量的间距相等。在一个示例中,第一段122a和第二段122b结构相同,两者平行设置。在另一个示例中,第一段122a和第二段122b各自朝向远离彼此的方向倾斜,以使两者之间的间距沿长度方向Z逐渐减小或增大。
在一个实施例中,本实施例的监测导线122的数量可以为两个以上。两个以上的监测导线122沿一方向并排设置,并且全部与防爆阀111位置相对设置。两个以上的监测导线122互为冗余。在二次电池11发生爆喷时,两个以上的监测导线122中的任意一个监测导线122都可以对二次电池11的状态进行监测,从而有利于提高监测准确度。两个以上的监测导线122中任一个监测导线122出现监测失效或未正常工作时,其余的监测导线122能够正常完成监测工作,从而降低漏判的可能性。
在一个实施例中,参见图2所示,监测导线122直接设置于基板121的表面上。基板121和监测导线122相连接的表面为平整面。两者通过卡扣或粘接的方式连接固定。在另一个实施例中,参见图3所示,基板121上设有容纳部121a。监测导线122设置于容纳部121a。监测导线122整体的形状与容纳部121a的形状相匹配。在监测导线122为U形结构时,容纳部121a也为U形结构。容纳部121a与防爆阀111位置对应设置。监测导线122被收纳于容纳部121a内,从而一方面,有利于提高结构紧凑性,节约空间,提高电池模组1能量密度,另一方面,监测导线122受到绝缘板的约束,提高了自身位置稳定性,降低监测导线122位置发生偏移 而不能够与防爆阀111的位置保持对应状态的可能性,降低高温物质无法作用于发生偏移的监测导线122而导致监测失效的可能性。
在一个实施例中,参见图5和图6所示,容纳部121a沿基板121的厚度方向Y贯穿基板121。容纳部121a沿长度方向Z延伸。监测导线122直接对应二次电池11的防爆阀111。在二次电池11发生爆喷时,内部高温物质能够直接作用于监测导线122,并快速地使监测导线122发生熔断或被外部冲击力冲断,以使监测导线122处于断开状态,从而有利于缩短监测时间。监测导线122沿厚度方向Y的最大尺寸小于基板121的厚度,并且监测导线122设置于容纳部121a内。沿厚度方向Y,监测导线122不露出于基板121,从而基板121能够对监测导线122形成保护,降低装配过程或后期使用过程中监测导线122受到外力冲击而被意外冲断的可能性。另外,监测导线122不会在厚度方向Y上侵占更多的安装空间,提升监测组件12整体结构紧凑性,从而有利于提高电池模组1的能量密度。
在另一个实施例中,参见图7所示,容纳部121a为沿基板121的厚度方向Y凹陷的凹槽。凹槽的底壁不贯穿基板121。基板121沿厚度方向Y能够为监测导线122提供承托力。在电池模组1使用过程中发生振动时,监测导线122不易从凹槽内脱出。本实施例的基板121在高温作用下自身会发生熔化或在冲击力作用下发生破碎。在一个示例中,凹槽沿长度方向Z直线延伸,以形成条形槽。监测导线122整体也呈条状结构,从而与凹槽形状相匹配。
在一个实施例中,参见图8和图9所示,监测组件12还包括包裹监测导线122的绝缘层123。绝缘层123填充于容纳部121a。监测导线122通过绝缘层123与基板121连接。防爆阀111发生爆喷时,绝缘层123能够被熔化或破碎。绝缘层123能够保证监测导线122与相邻通电结构件绝缘隔离,降低监测导线122与相邻通电结构件发生接触而造成短路。绝缘层123能够填充监测导线122和基板121之间的间隙,从而提高监测导线122的位置稳定性。绝缘层123能够降低第一段122a和第二段122b发生击穿短路的可能性。二次电池11发生爆喷时,高温物质能够首先熔化或破碎,以暴露出内部的监测导线122,然后高温物质再将监测导线122熔 断或冲断。
在一个实施例中,绝缘层123的厚度为M,而监测导线122的最大外径为D,其中,0.05≤M/D≤10。当M/D小于0.05时,绝缘层123的厚度过薄,绝缘性能变差,提高发生绝缘失效的可能性。当M/D大于10时,绝缘层123的厚度过厚,从而在防爆阀111发生爆喷时,高温物质易于受到绝缘层123阻挡作用,不易快速地将绝缘层123熔化或破碎,延长了监测导线122的监测时间。在一个示例中,绝缘层123任一位置测量出的厚度值均为M。在另一个示例中,沿厚度方向Y,绝缘层123设置于监测导线122下方的部分沿厚度方向Y的厚度为M。沿厚度方向Y,对绝缘层123设置于监测导线122下方的部分作直线式测量,以得到厚度值M。
在一个实施例中,绝缘层123的厚度为M,其中,0.1mm≤M≤1mm。绝缘层123的材料可以是聚乙烯、聚丙烯或聚酯等高分子材料,也可以是陶瓷或云母。绝缘层123的厚度可以为0.1mm至1mm。绝缘层123的绝缘性能大于500MΩ。绝缘层123的厚度小于0.1mm时,绝缘性能会降低,从而提高第一段122a和第二段122b击穿发生短路的可能性,出现错误报警情况,降低监测准确性。绝缘层123的厚度大于1mm时,绝缘层123熔化难度或破碎难度增大,从而存在二次电池11发生爆喷时,绝缘层123未能熔化或破碎以暴露出监测导线122的情况,进而导致第一段122a和第二段122b无法发生断路,使得监测线缆组无法正常完成监测工作,无法判断二次电池11已发生爆喷的状态。
在一个实施例中,参见图6或图7所示,监测组件12还包括防护板13。沿基板121的厚度方向Y,防护板13设置于基板121靠近二次电池11的一侧。防护板13能够提供额外保护。二次电池11发生爆喷时,防护板13能够阻挡高温物质向外扩散,提升电池模组1安全性。防护板13可以与基板121连接固定,并且基板121和防护板13沿厚度方向Y层叠。可选地,防护板13为云母、陶瓷、复合材料等耐高温高强度绝缘材料组成。可选地,基板121与防护板13通过硅酮胶、高温环氧胶、有机硅、酚醛类等耐高温粘合剂进行粘接。
在一个实施例中,参见图6或图7所示,监测组件12还包括隔离板 14。沿基板121的厚度方向Y,隔离板14设置于基板121远离二次电池11的一侧。隔离板14将二次电池11和监测组件12隔离开。隔离板14可以与基板121连接固定,并且基板121和防护板13沿厚度方向Y层叠。二次电池11发生爆喷时,高温物质首先将隔离板14熔化或冲碎,然后再将监测导线122熔断或冲断。可选地,隔离板14为云母或塑料等绝缘材料组成。可选地,基板121与隔离板14通过硅酮胶、高温环氧胶、有机硅、酚醛类等耐高温粘合剂进行粘接。
本申请实施例的电池模组1能够通过设置监测组件12来实现对二次电池11的状态进行实时监测。监测组件12包括基板121和监测导线122。监测导线122自身构成完整回路。在二次电池11发生爆喷喷出高温物质时,监测组件12所包括的监测导线122被熔断或冲断而断开,此时监测导线122内部无法继续传递电信号,从而及时反馈二次电池11发生爆喷的信号,以便于对电池模组1及时采取安全干预措施及时遏制二次电池11爆喷的高温物质蔓延,提高电池模组1使用过程的安全性。
参见图10所示,本申请实施例还提供一种电池包2,其包括上述各实施例的电池模组1。在一个实施例中,电池模组1的数量为两个以上。两个以上电池模组1各自所包括的监测导线122串联连接。所有的监测导线122串联连接后,再通过总输入端和总输出端与电池管理***的正极端子和负极端子相连接,从而对每个电池模组1进行实时监测。
本申请实施例的电池包2能够通过监测组件12来实现对电池模组1的状态进行实时监测。在二次电池11发生爆喷喷出高温物质时,监测组件12所包括的监测导线122被熔断或冲断而断开,此时监测导线122内部无法继续传递电信号,从而及时反馈电池模组1发生爆喷的信号,以便于对电池包2及时采取安全干预措施及时遏制电池模组1爆喷的高温物质蔓延,提高电池包2使用过程的安全性。
在一个实施例中,电池包2还包括箱体21和盖体22。箱体21具有用于容纳电池模组1的容纳腔。将电池模组1装入箱体21的容纳腔内,最后将箱体21和盖体22连接固定。
在一个实施例中,参见图11和图12所示,本申请实施例还提供一种 电池包3,其包括电池单元31、盖体22和监测组件12。盖体22设置于电池单元31的上方。监测组件12设置于盖体22。监测组件12包括基板121以及监测导线122。监测导线122与基板121连接。电池单元31发生爆喷时,监测导线122能够断开,以实现对电池单元31状态的监测。
在一个实施例中,电池单元31可以是单个的二次电池11、上述各实施例的电池模组1或现有技术中的电池模组。
在一个实施例中,监测组件12的基板121与盖体22粘接连接。可选地,基板121与盖体22通过硅酮胶、高温环氧胶、有机硅、酚醛类等耐高温粘合剂进行粘接。
在一个实施例中,电池包3还包括箱体21。箱体21具有用于容纳电池单元31的容纳腔。将电池单元31装入箱体21的容纳腔内,最后将箱体21和盖体22连接固定。
本申请实施例的电池包3能够通过设置监测组件12来实现对电池单元31的状态进行实时监测。监测组件12包括基板121和监测导线122。正常状态下,监测导线122自身构成完整回路。在电池单元31发生爆喷喷出高温物质时,监测组件12所包括的监测导线122被熔断或冲断而断开,此时监测导线122内部无法继续传递电信号,从而及时反馈电池单元31发生爆喷的信号,以便于对电池包3及时采取安全干预措施及时遏制电池单元31爆喷的高温物质蔓延,提高电池包3使用过程的安全性。
虽然已经参考优选实施例对本申请进行了描述,但在不脱离本申请的范围的情况下,可以对其进行各种改进并且可以用等效物替换其中的部件,尤其是,只要不存在结构冲突,各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例,而是包括落入权利要求的范围内的所有技术方案。
Claims (17)
- 一种电池模组,其中,包括:二次电池,多个所述二次电池并排设置,所述二次电池具有防爆阀;监测组件,所述监测组件设置于所述二次电池的上方,所述监测组件包括基板以及监测导线,所述监测导线与所述基板连接;所述监测导线与各个所述防爆阀位置对应设置;任意一个所述防爆阀发生爆喷时,所述监测导线能够断开,以实现对所述电池模组状态的监测。
- 根据权利要求1所述的电池模组,其中,所述监测导线具有沿所述基板的宽度方向间隔设置的第一段和第二段,所述第一段和所述第二段之间的最小间距为H,所述监测导线的外径为D,其中,H/D≥2.5。
- 根据权利要求2所述的电池模组,其中,所述监测导线呈U形结构。
- 根据权利要求2或3所述的电池模组,其中,所述防爆阀具有沿所述基板的长度方向延伸的中心线,所述第一段和所述第二段分别设置于所述中心线的两侧。
- 根据权利要求2至4任一项所述的电池模组,其中,所述监测导线的外径D,其中,0.1mm≤D≤2mm,所述第一段和所述第二段之间的最小间距H,其中,5mm≤H≤50mm。
- 根据权利要求1至5任一项所述的电池模组,其中,所述基板上设有容纳部,所述监测导线设置于所述容纳部,所述监测导线的形状与所述容纳部的形状相匹配。
- 根据权利要求6所述的电池模组,其中,所述容纳部为沿所述基板的厚度方向凹陷的凹槽,所述凹槽的底壁不贯穿所述基板。
- 根据权利要求6所述的电池模组,其中,所述容纳部沿所述基板的厚度方向贯穿所述基板,所述监测导线沿所述厚度方向的最大尺寸小于所述基板的厚度,并且所述监测导线设置于所述容纳部内。
- 根据权利要求6至8任一项所述的电池模组,其中,所述监测组件还包括包裹所述监测导线的绝缘层,所述绝缘层填充于所述容纳部,所 述监测导线通过所述绝缘层与所述基板连接。
- 根据权利要求9所述的电池模组,其中,所述绝缘层的厚度为M,所述监测导线的最大外径为D,其中,0.05≤M/D≤10。
- 根据权利要求10所述的电池模组,其中,所述绝缘层设置于所述监测导线下方的部分沿所述厚度方向的厚度为M。
- 根据权利要求10或11所述的电池模组,其中,所述绝缘层的厚度M,其中,0.1mm≤M≤1mm。
- 根据权利要求1至12任一项所述的电池模组,其中,所述监测组件还包括防护板,沿所述基板的厚度方向,所述防护板设置于所述基板靠近所述二次电池的一侧。
- 根据权利要求1至13任一项所述的电池模组,其中,所述监测组件还包括隔离板,沿所述基板的厚度方向,所述隔离板设置于所述基板远离所述二次电池的一侧。
- 一种电池包,其中,包括如权利要求1至14任一项所述的电池模组。
- 根据权利要求15所述的电池包,其中,所述电池模组的数量为两个以上,两个以上所述电池模组各自所包括的所述监测导线串联连接。
- 一种电池包,其中,包括:电池单元;盖体,设置于所述电池单元上方;监测组件,所述监测组件设置于所述盖体,所述监测组件包括基板以及监测导线,所述监测导线与所述基板连接;所述电池单元发生爆喷时,所述监测导线能够断开,以实现对所述电池单元状态的监测。
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CN209860056U (zh) * | 2019-04-30 | 2019-12-27 | 宁德时代新能源科技股份有限公司 | 电池模组及电池包 |
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US11211667B2 (en) | 2021-12-28 |
CN111864292A (zh) | 2020-10-30 |
EP3734747B1 (en) | 2021-08-25 |
US20200350536A1 (en) | 2020-11-05 |
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