CN115295971B - Protective structure of battery - Google Patents
Protective structure of battery Download PDFInfo
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- CN115295971B CN115295971B CN202211225028.6A CN202211225028A CN115295971B CN 115295971 B CN115295971 B CN 115295971B CN 202211225028 A CN202211225028 A CN 202211225028A CN 115295971 B CN115295971 B CN 115295971B
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- 230000001681 protective effect Effects 0.000 title claims abstract description 95
- 230000007246 mechanism Effects 0.000 claims abstract description 48
- 230000000670 limiting effect Effects 0.000 claims abstract description 45
- 230000000694 effects Effects 0.000 claims abstract description 8
- 230000017525 heat dissipation Effects 0.000 claims description 15
- 238000005381 potential energy Methods 0.000 claims description 12
- 230000002159 abnormal effect Effects 0.000 claims description 8
- 230000000903 blocking effect Effects 0.000 claims description 5
- 230000033228 biological regulation Effects 0.000 claims 1
- 230000001737 promoting effect Effects 0.000 claims 1
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 230000007704 transition Effects 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 6
- 230000005611 electricity Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000009970 fire resistant effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
-
- 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
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/14—Primary casings; Jackets or wrappings for protecting against damage caused by external factors
- H01M50/143—Fireproof; Explosion-proof
-
- 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
-
- 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
- H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
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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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses a protective structure of a battery, and relates to the technical field of batteries. Including protective housing, protective housing's inside parcel has electric core, protective housing's first end is provided with the opening, the opening is used for getting to put electric core, protective housing's second end seals, be provided with the positive negative pole mechanism that is used for exporting the electric energy on the electric core, the protective cover is installed to protective housing's first end, be provided with trigger mechanism and control mechanism on the protective cover. According to the invention, through the matching arrangement of the trigger assembly, the high-temperature driving assembly and the limiting assembly, when the internal temperature of the battery cell rises, the limiting effect of the limiting assembly on the trigger assembly can be relieved through the driving of the high-temperature driving assembly, and then the trigger assembly can be switched from the use state to the trigger state, so that the electrical connection between the battery cell and the outside is cut off, the effect of automatically controlling the circuit break of the battery cell is achieved, and the safety of the whole circuit is effectively ensured.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a protective structure of a battery.
Background
And current battery module output utmost point protection is usually through setting up battery management system, utilize the time to pay close attention to the inside parameter of battery module, warn when the problem appears, though the service environment of detection battery module that can be fine, and in time remind, but when unexpected circumstances in the proruption, the battery module has been impaired and breaks down, the protection to the battery module this moment often only can separate the fire material through setting up in the battery module production process and protect, but the inside trouble battery of battery module still is in connected state at this moment, can not timely cut off, thereby lead to under the condition that unexpected battery damaged, its protective effect is unsatisfactory, what even more can cause the loss to enlarge, the protective structure of a battery is proposed for this reason.
Disclosure of Invention
The present invention is directed to a protective structure of a battery to solve the above problems.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a protective structure of battery, includes protective housing, protective housing's inside parcel has electric core, protective housing's first end is provided with the opening, the opening is used for getting to put electric core, protective housing's second end is sealed, be provided with the positive negative pole mechanism that is used for exporting the electric energy on the electric core, the protective cover is installed to protective housing's first end, be provided with trigger mechanism and control mechanism on the protective cover, trigger mechanism is including triggering assembly and coupling assembling, coupling assembling is used for carrying out the inside electric energy output of electric core or input with positive negative pole mechanism electric connection, trigger assembly has two kinds of operating condition of user state and trigger state, when trigger assembly is in the user state, can guarantee coupling assembly and positive negative pole mechanism's electric connection, when trigger assembly is in the trigger state, can cut off coupling assembly and positive negative pole mechanism's electric connection, control mechanism is used for when electric core is in abnormal state, will trigger the assembly and switch into the trigger state by the user state.
Preferably, in this technical solution, the trigger assembly includes: self-rotation module and spacing module, have self-rotation potential energy when the self-rotation module is in initial condition, and respectively with coupling assembling and positive negative pole mechanism electric connection, when triggering the subassembly and being in the user state, the self-rotation module is in initial position, just spacing module locking the protective cover with relative position between the self-rotation module, when triggering the subassembly and being in the trigger state, spacing module removes right the protective cover with relative position's between the self-rotation module locking, the self-rotation module rotation under self potential energy state, and the disconnection electric connection between coupling assembling and the positive negative pole mechanism.
This technical scheme is preferred, coupling assembling includes first connection module and second connection module, first connection module sets up on the protective cover, the second connection module sets up on the rotation module, when the rotation module is in initial condition, communicate in proper order between first connection module, second connection module and the positive negative pole mechanism, when the rotation module position is relieved the limit, form between first connection module, second connection module and the positive negative pole mechanism and open circuit.
This technical scheme is preferred, control mechanism includes high temperature drive assembly and short circuit overload drive assembly, when high temperature drive assembly was used for electric core overheated, drive spacing module and relieve spacing to the self-rotation module, when short circuit overload drive assembly was used for electric core short circuit or transships, drive spacing module and relieve spacing to the self-rotation module.
This technical scheme is preferred, the rotation module includes interior regulating block and at least one coil spring, interior regulating block is located the inside of protective cover, just interior regulating block forms to rotate through pivot and protective cover and is connected, the axial lead of pivot extends along the first direction, the first direction by the directional second end of protective housing's first end, coil spring's one end is connected with the protective cover, and its other end is connected with the pivot, the coil spring deposit has the promotion pivot pivoted energy.
This technical scheme is preferred, spacing module is including protection slider and elastic component, the protection slider forms sliding connection along first direction and protective cover, the elastic component activity sets up in the inner wall of protective cover, when triggering the subassembly and being in the user state, the first end of elastic component forms the conflict with the protection slider, and its second end forms the conflict with interior regulating block, the second direction is the directional second end of first end of elastic component, the second direction is mutually perpendicular with first direction, the dislocation groove has been seted up on the protection slider, when triggering the subassembly and being in the trigger state, the elastic component falls into the dislocation groove, the conflict of elastic component and interior regulating block disappears.
This technical scheme is preferred, high temperature drive assembly includes the temperature sensing module, the temperature sensing module sets up under protection slider is along first direction, electric core normal during operation, the temperature sensing module is contactless with protection slider, when electric core heaies up, the temperature sensing module can follow first direction jacking protection slider, until the elastic component falls into and dislocates in the groove.
This technical scheme is preferred, short circuit overload drive assembly includes jacking module and blocks the module, the jacking module has the potential energy along first direction jacking protection slider, electric core normal during operation, block the relative position that the module can lock between protection slider and the protective cover, when electric core short circuit perhaps transships, block the module and remove the relative position locking between protection slider and the protective cover, the protection slider rises under the potential energy effect of jacking module, until the elastic component falls into the dislocation groove.
This technical scheme is preferred, and it still includes the honeycomb lid, the honeycomb lid is located protective housing's first end is used for the encapsulation the electric core, be formed with the heat dissipation district on the interior regulating block, the louvre has been seted up on the heat dissipation district, the louvre is linked together with the honeycomb lid.
In a preferred embodiment of the present invention, the honeycomb cover is provided with an inner electrode block set, the inner electrode block set includes at least one positive electrode block and at least one negative electrode block, the positive electrode block is electrically connected to a positive electrode of the electrical core, and the negative electrode block is electrically connected to a negative electrode of the electrical core.
Compared with the prior art, the invention has the beneficial effects that:
this protective structure of battery, through triggering the subassembly, the cooperation setting of high temperature drive assembly and spacing subassembly, realized when the inside temperature of electric core risees, can remove spacing subassembly to the limiting displacement of triggering the subassembly through the drive of high temperature drive assembly, and then trigger the subassembly and can be switched into the state of triggering by the user state, make electric core and external electric connection cut off, reach the effect that automatic control electric core opened circuit, effectively guarantee whole circuit safety, reach the effect of protecting one by one, rise when external environment whole temperature simultaneously, the battery module is whole under high temperature environment, thereby lead to triggering the subassembly of triggering of a plurality of batteries simultaneously in the battery module, the electric core of a plurality of batteries of inside battery module is the shutdown circuit simultaneously, independently protect, effectively prevent the mutual influence between the different batteries, and the effect of protection is improved.
This protective structure of battery, through triggering the subassembly, short circuit overload drive subassembly and spacing subassembly's cooperation sets up, realized when the short circuit appears in the electric core in the battery or transship, can remove spacing subassembly to triggering the limiting displacement of subassembly through short circuit overload drive subassembly drive, and then trigger the subassembly and can switch into the trigger state by user state, make electric core and external electric connection cut off, reach the effect that automatic control electricity core opened circuit, further improvement the safety in utilization of battery.
Simultaneously because the protective structure of this battery adopts pure machinery to carry out the linkage, consequently it can be applicable to various types of battery, for example lithium cell or lead acid battery, it also does not restrict the shape of battery simultaneously, for example square or circular battery.
Drawings
Fig. 1 is a perspective view of a battery module according to the present invention;
fig. 2 is a sectional view of a battery according to the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2 in accordance with the present invention;
fig. 4 is a top view of a battery according to the present invention;
fig. 5 is a cross-sectional view of a protective cover according to the present invention;
FIG. 6 is an enlarged view of portion B of FIG. 5 in accordance with the present invention;
fig. 7 is a perspective view of a temperature sensing module according to the present invention.
In the figure: 1. a battery module; 2. an insulating cover; 3. a joint; 4. a protective housing; 41. a refractory layer; 5. a honeycomb cover; 51. an inner electrode block group; 6. a temperature sensing module; 61. a bi-metal spiral sheet; 62. driving the screw rod; 63. a top rod; 7. a protective cover; 71. an inner adjusting block; 72. a coil spring; 73. an outer connecting block; 74. an inner connection block; 75. a movable contact block; 76. a limiting part; 77. a push rod; 78. a limiting rod; 79. a limiting spring; 710. positioning a slide block; 711. positioning the chute; 712. a heat dissipation area; 713. a sealing region; 714. connecting wires; 8. a protective slider; 81. a dislocation groove; 82. a transition rod; 83. a pressure spring; 84. a gear bump; 85. a gear lever; 86. a gear spring; 87. a permanent magnet; 88. an electromagnet; 9. and (5) battery cores.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that in the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
Further, it will be appreciated that the dimensions of the various elements shown in the figures are not drawn to scale, for ease of description, and that the thickness or width of some layers may be exaggerated relative to other layers, for example.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined or illustrated in one of the figures, it will not need to be further discussed or illustrated in detail in the description of the figures that follows.
Before understanding the technical solution, it should be noted that, the battery module 1 mentioned in the present invention is generally shown in fig. 1, and its conventional shape is rectangular bar, a plurality of batteries are uniformly arranged in the battery module 1 at equal intervals, fire-insulating material is arranged between adjacent batteries, and the arranged batteries have various shapes, such as rectangular bar and cylinder, etc. commonly used, two sets of wires are generally adopted to respectively connect all the positive electrodes and negative electrodes of the batteries in series, and after two sets of wires are led out of the battery module 1 to form the connectors 3 for outputting and inputting electric energy, the top of the battery module 1 is encapsulated by the insulating cover 2, so as to obtain the complete battery module 1.
As shown in fig. 2, 4 and 5, in order to solve the technical problems proposed in the background art, the present invention provides a technical solution: a protective structure of a battery comprises a protective shell 4, wherein the protective shell 4 can be designed into a double-layer shell structure in order to improve the fire resistance of the battery, a fire-resistant material is filled between two layers of shells to form a fire-resistant layer 41, a battery cell 9 is wrapped in the protective shell 4, an opening is formed in a first end of the protective shell 4 and used for taking and placing the battery cell 9, a second end of the protective shell 4 is closed, a positive and negative electrode mechanism used for outputting electric energy is arranged on the battery cell 9, the positive and negative electrode mechanism mainly has the function of leading out a positive electrode and a negative electrode in the battery cell 9, and in order to realize that the battery has an automatic power-off function when in an abnormal state, the first end of the protective shell 4 is provided with a trigger mechanism and a control mechanism, the trigger mechanism comprises a trigger assembly and a connecting assembly, and the connecting assembly is used for electrically connecting the positive and negative electrode mechanisms, the electric energy in the battery cell 9 is output or input, the trigger assembly has two working states of a use state and a trigger state, when the trigger assembly is in the use state, the electrical connection between the connecting assembly and the positive and negative electrode mechanisms can be ensured, when the trigger assembly is in the trigger state, the electrical connection between the connecting assembly and the positive and negative electrode mechanisms can be cut off, the control mechanism is used for switching the trigger assembly from the use state to the trigger state when the battery cell 9 is in the abnormal state, it needs to be known that the abnormal state mentioned in the invention comprises the abnormal phenomena of overheating phenomenon, battery short circuit or battery overload and the like in the use process of the battery, when the battery normally works, the trigger assembly is in the use state, and at the moment, the battery can sequentially carry out electric energy exchange with the outside through the positive and negative electrode mechanisms (namely the inner electrode block group 51 on the honeycomb cover 5) and the connecting assembly, when the battery is in an abnormal state, the positive and negative electrode mechanisms and the connecting assembly are disconnected, and the battery cannot exchange electric energy with the outside, so that the battery is protected, and other batteries in the battery module 1 can be protected.
To further illustrate the present invention, the present embodiment provides a specific triggering component, which includes: the self-rotation module and the limiting module, the self-rotation module has self-rotation potential energy when in an initial state and is respectively electrically connected with the connecting assembly and the positive and negative electrode mechanisms, when the trigger assembly is in a use state, the self-rotation module is in an initial position, the limiting module locks the relative position between the protective cover 7 and the self-rotation module, when the trigger assembly is in a trigger state, the limiting module unlocks the relative position between the protective cover 7 and the self-rotation module, the self-rotation module rotates under the self potential energy state and breaks the electrical connection between the connecting assembly and the positive and negative electrode mechanisms, concretely, as shown in figure 5, the self-rotation module comprises an inner adjusting block 71 and at least one spiral spring 72, the inner adjusting block 71 is positioned inside the protective cover 7, the inner adjusting block 71 is in rotary connection with the protective cover 7 through a rotating shaft, and the axial lead of the rotating shaft extends along a first direction, the first direction is from the first end of the protective shell 4 to the second end, one end of the spiral spring 72 is connected with the protective cover 7, the other end is connected with the rotating shaft, the spiral spring 72 stores energy for driving the rotating shaft to rotate, namely, the spiral spring 72 is in a stretching or compressing state, namely, the rotating shaft can constantly keep a trend for driving the inner adjusting block 71 to rotate, the structure can ensure that the inner adjusting block 71 can freely rotate in the protective cover 7 by taking the axis of the rotating shaft as the center, therefore, it is clear that a conductive area and a non-conductive area can be arranged on the inner adjusting block 71, when the self-rotating module is in an initial state, the positive and negative mechanisms can be electrically connected with the connecting assembly through the conductive area, the battery cell 9 can be communicated with the outside and can exchange electric energy, when the trigger assembly is in a use state, the positive and negative electrode mechanisms can be connected with the connecting assembly through the non-conductive area, at the moment, an open circuit is formed, and then the battery cell 9 cannot be communicated with the outside, so that the electric energy cannot be exchanged.
Further, adapted to the above trigger assembly, the connection assembly includes a first connection module and a second connection module, wherein the first connection module is disposed on the protective cover 7, the second connection module is disposed on the rotation module, when the rotation module is in an initial state, the first connection module, the second connection module, and the positive and negative electrode mechanisms are sequentially connected, and when the position of the rotation module is lifted, an open circuit is formed between the first connection module, the second connection module, and the positive and negative electrode mechanisms, as shown in fig. 3 and 5, specifically, the positive and negative electrode mechanisms include an inner electrode block group 51, the inner electrode block group 51 includes at least one positive electrode block and at least one negative electrode block, the positive electrode block is electrically connected to the positive electrode of the electrical core 9, the negative electrode block is electrically connected to the negative electrode of the electrical core 9, and the first connection module is mainly used for electrically connecting to the positive electrode block and the negative electrode block in the inner electrode block group 51, so that the first connection module at least needs to be disposed in two groups, one group is electrically connected to the positive electrode block, the other group is electrically connected to the negative electrode block, or for preventing a short circuit, and a plurality of groups of the first connection module may be designed to be respectively connected to each of the positive electrode blocks, and each group of the first connection module includes: an outer connecting block 73 and an inner connecting block 74 corresponding to the outer connecting block 73, as shown in fig. 5, the outer connecting block 73 is disposed on a top wall of the protecting cover 7 along the first direction, the inner connecting block 74 is disposed on a bottom wall of the protecting cover 7 along the first direction, both the outer connecting block 73 and the inner connecting block 74 are capable of conducting electricity, the inner connecting block 74 is used for contacting with a positive electrode block or a negative electrode block in the inner electrode block set 51, and the outer connecting block 73 is used for connecting with an external positive electrode wire and a negative electrode wire.
The second connection modules disposed on the inner adjustment block 71 need to correspond to the first connection modules one to one, and the second connection modules can enable the outer connection block 73 and the inner connection block 74 in the first connection module to form an electrical connection, as shown in fig. 5, the second connection modules include: the trigger assembly comprises a pair of movable contact blocks 75 and a connecting line 714, wherein the two movable contact blocks 75 are arranged on two end faces of the inner adjusting block 71 along the first direction, the connecting line 714 is embedded inside the inner adjusting block 71, two ends of the connecting line 714 are fixedly connected with the two movable contact blocks 75 respectively, the movable contact blocks 75 and the connecting line 714 can conduct electricity, when the trigger assembly is in a use state, the two movable contact blocks 75 are in contact with the corresponding inner connecting block 74 and the corresponding outer connecting block 73 respectively, further the inner connecting block 74 and the corresponding outer connecting block 73 can be electrically connected through the movable contact blocks 75 and the connecting line 714, when the trigger assembly is in a trigger state, the corresponding movable contact blocks 75 are in contact with the inner connecting block 74 and/or the corresponding outer connecting block 73 respectively to form an open circuit, meanwhile, in order to prevent the movable contact blocks 75 from being in small contact area with the outer connecting block 73 or the inner connecting block 74 respectively to form a short circuit or generate an electric spark, the movable contact blocks 75 can be designed into a disc-shaped structure, and guarantee that the cross-area of the movable contact blocks 75 along the first direction is larger than that the cross-area of the contact points of the outer connecting block 73 and the inner connecting block 74.
It should be noted that, since the above-mentioned self-rotation module has a tendency of self-rotation, in order to prevent the trigger assembly from being in a use state, the self-rotation module automatically rotates to switch the working state of the trigger assembly to be in a trigger state, and therefore a limit module is required to be provided, the limit module in this embodiment includes a protection slider 8 and an elastic member, the protection slider 8 forms a sliding connection with the protection cover 7 along a first direction, the elastic member is movably disposed on the inner wall of the protection cover 7, when the trigger assembly is in the use state, a first end of the elastic member forms a collision with the protection slider 8, a second end of the elastic member forms a collision with the inner adjusting block 71, a second direction is that the first end of the elastic member points to the second end, the second direction is perpendicular to the first direction, a dislocation groove 81 is provided on the protection slider 8, when the trigger assembly is in the trigger state, the elastic member falls into the unseating groove 81, the elastic member and the inner adjusting block 71 are not interfered with each other, specifically, as shown in fig. 5 and 6, the elastic member includes a push rod 77, a limiting spring 79 and a limiting rod 78 which are sequentially connected along the second direction, the limiting rod 78 is adapted to the limiting portion 76, as can be seen from the above, when the push rod 77 falls into the unseating groove 81, the interference force between the limiting rod 78 and the limiting portion 76 is weakened or disappears, and the inner adjusting block 71 can rotate, in the actual design process, the matching between the limiting rod 78 and the limiting portion 76 can be various, for example, the limiting rod 78 is designed into a limiting tooth-shaped structure, and the limiting portion 76 is designed into a limiting ratchet, or the limiting rod 78 is designed into a cylindrical shape with rounded ends, and the limiting portion 76 can be designed into a groove shape.
Meanwhile, when the battery cell 9 is in an abnormal working state, the control mechanism can switch the trigger assembly from a use state to a trigger state, the control mechanism comprises a high-temperature driving assembly and a short-circuit overload driving assembly, the high-temperature driving assembly is used for driving the limiting module to remove the limitation on the self-rotation module when the battery cell 9 is overheated, and the short-circuit overload driving assembly is used for driving the limiting module to remove the limitation on the self-rotation module when the battery cell 9 is short-circuited or overloaded.
Specifically, the high-temperature driving assembly comprises a temperature sensing module 6, the temperature sensing module 6 is arranged right below the protective sliding block 8 along the first direction, and when the battery cell 9 works normally, the temperature sensing module 6 is not in contact with the protective sliding block 8; when the temperature of the battery cell 9 rises, the temperature sensing module 6 can lift the protective sliding block 8 along the first direction until the elastic member falls into the dislocation groove 81, as shown in fig. 2, when the battery cell 9 abnormally generates high heat, the temperature inside the protective casing 4 rises, and the temperature sensing module 6 can expand along the first direction after being heated, so that the expanded temperature sensing module 6 can lift the protective sliding block 8 along the first direction until the dislocation groove 81 on the protective sliding block 8 coincides with the projection of the elastic member along the second direction, at this time, the abutting end of the elastic member and the protective sliding block 8 falls into the dislocation groove 81, the abutting force between the other end of the elastic member and the limiting part 76 is reduced or disappears, and the coil spring 72 stores energy for driving the rotation of the rotating shaft, furthermore, the coil spring 72 can drive the inner adjusting block 71 to rotate through the rotating shaft, so as to switch the operating state of the triggering assembly from the use state to the triggering state, and meanwhile, in order to prevent the inner adjusting block 71 from rotating excessively, a positioning slider 710 may be disposed on a side surface of the inner adjusting block 71 along the first direction, and a positioning chute 711 is disposed on a side wall of the protective cover 7 along the first direction to limit the angle of rotation of the inner adjusting block 71 to prevent the inner adjusting block from rotating excessively, as shown in fig. 4, a central angle generated by the positioning chute 711 may be 30 to 90 °, which may be any one of 30 °, 35 °, 40 °, 45 °, 50 °, 55 °, 60 °, 65 °, 70 °, 75 °, 80 °, 85 °, and 90 °, or any value between the adjacent degrees.
As shown in fig. 2 and 7, a circular groove is formed in the inner wall of the protective casing 4 along a first direction, and the temperature sensing module 6 includes: the push rod 63, the driving screw rod 62 and the bimetal spiral sheet 61 are sequentially arranged from top to bottom along a first direction, the push rod 63 is in threaded connection with the driving screw rod 62, the push rod 63 is matched with the circular grooves, the push rod 63 mainly serves to enable the jacking process to be more stable and not to shake, the driving screw rod 62 is arranged for enabling the temperature sensing module 6 to be suitable for the circular grooves with different depths, when the depths of the circular grooves are different due to different types of batteries or other reasons in the production process of the batteries, the top end of the push rod 63 and the top end of the circular groove can form a proper distance by screwing the push rod 63 and the driving screw rod 62, the temperature sensing module 6 is enabled to have proper precision, the bimetal spiral sheet 61 is different in thermal expansion coefficient of each component layer, when the temperature changes, the deformation of the driving layer is larger than that of the driven layer, the whole bimetal spiral sheet 61 can be bent towards one side of the driven layer, and appears as a result that the bimetal spiral sheet 61 expands and lengthens as a whole, which is mature prior art, and therefore macro is not described in detail.
Specifically, the short circuit overload driving assembly comprises a jacking module and a blocking module, the jacking module has potential energy for jacking the protective sliding block 8 along the first direction, when the battery cell 9 works normally, the blocking module can lock the relative position between the protective slider 8 and the protective cover 7, when the battery cell 9 is short-circuited or overloaded, the blocking module releases the locking of the relative position between the protective sliding block 8 and the protective cover 7, the protective sliding block 8 rises under the potential energy of the jacking module until the elastic piece falls into the dislocation groove 81, as shown in fig. 6, the jacking module includes a pressure spring 83 and a transition rod 82, which are arranged at the bottom of the protection slider 8 in sequence along the first direction, one end of the pressure spring 83 is fixed with the bottom of the protection slider 8 along the first direction, the other end of the transition rod is fixed with the transition rod 82, the pressure spring 83 stores the energy of the jacking protective sliding block 8, the diameter of the transition rod 82 needs to be larger than that of the circular groove, the transition rod 82 is prevented from falling into the circular groove, so that the energy storage of the pressure spring 83 disappears, the transition rod 82 can be slidably arranged inside the protective sliding block 8 and can be directly arranged right below the protective sliding block 8 along the first direction, and the blocking module comprises a short circuit overload driving structure and a gear bump 84, the gear bump 84 is arranged on the side surface of the protective sliding block 8 along the first direction, when the trigger assembly is in a use state, the short circuit overload driving structure can generate interference with the gear bump 84, which can generate a force to prevent the protective slider 8 from moving upwards, when the battery cell 9 is short-circuited or overloaded, the short-circuit overload driving structure can cancel the interference generated by the gear bump 84, the guard slide 8 is raised by the pressure spring 83 until the push rod 77 falls into the unseating groove 81 and the trigger assembly switches to the trigger state.
Further, the short-circuit overload driving structure in this embodiment includes: the electromagnet 88 and the permanent magnet 87 are attracted to each other when the electromagnet 88 is energized, the shift spring 86 prevents the electromagnet 88 from being close to the permanent magnet 87, when the battery cell 9 is normally used, the shift lever 85 is in contact with the shift bump 84, namely, the shift lever 85 and the shift bump 84 have a force for preventing the protection slider 8 from moving upwards, the circuit of the electromagnet 88 is connected in series with the circuit of the battery cell 9, when the battery cell 9 is short-circuited or overloaded, the internal current of the electromagnet 88 is increased instantaneously, a large instantaneous attraction force is generated between the electromagnet 88 and the permanent magnet 87, the permanent magnet 87 is attracted to the electromagnet 88, the shift lever 85 is further moved in a direction away from the shift bump 84 under the driving of the electromagnet 88 until the shift lever 85 is not in contact with the shift bump 84, further, the protection slider 8 rises under the action of the pressure spring 83 until the push rod 77 falls into the dislocation groove 81, and the trigger assembly is switched to the trigger state.
It should be noted that, when the battery normally works, the short circuit overload driving structure can generate a force for preventing the protection slider 8 from rising, and therefore, when the battery is overheated, the temperature sensing module 6 needs to overcome the resistance to lift the protection slider 8, and therefore, when designing, it is only necessary to pay attention to the mechanical cooperation between the short circuit overload driving structure and the temperature sensing module 6, and as shown in fig. 6, in order to enable the structure to be reused when eliminating the battery fault, in the design, the top of the dislocation groove 81 along the first direction can be designed to be gradually reduced, and the gear lever 85 and the gear protrusion 84 are designed to be in flange contact, only the inner adjusting block 71 needs to be rotated to reset, and the protection slider 8 is pressed down, so that the whole structure can be reset again.
Meanwhile, it should be noted that when the limiting rod 78 is designed to be a limiting toothed structure and the limiting portion 76 is designed to be a limiting ratchet, the limitation on the inner adjusting block 71 can be removed only when the limiting rod 78 and the limiting portion 76 are not in contact at all, so that when the design is performed, the dislocation groove 81 needs to be designed to be a groove with a depth of a sudden change type, the length of the dislocation groove 81 in the second direction needs to be greater than the length of the limiting spring 79 in a natural state, and meanwhile, the weight of the push rod 77 needs to be ensured to be greater than the weight (generally designed to be 2 to 4 times) of the limiting rod 78, so that when the protective slider 8 is lifted, the push rod 77 can drive the limiting rod 78 to bounce into the dislocation groove 81 at the moment when the push rod 77 falls into the dislocation groove 81, and the limiting rod 78 and the limiting portion 76 are not in contact at all, and the inner adjusting block 71 can rotate; when the stopper rod 78 is designed to be a cylindrical shape with a rounded end and the stopper portion 76 is designed to be a rounded groove shape, even if the stopper rod 78 contacts the stopper portion 76, the inner adjusting block 71 can rotate under the driving action of the coil spring 72 when the abutting force generated between the stopper rod 78 and the stopper portion 76 is small.
As shown in fig. 2 to 4, in order to facilitate heat dissipation of the battery, the invention further includes a honeycomb cover 5, the honeycomb cover 5 is covered on the first end of the protective housing 4 and is used for packaging the battery cell 9, the inner electrode block group 51 is disposed on the honeycomb cover 5, when the inner adjusting block 71 is designed, heat dissipation holes symmetrical along the axis of the rotating shaft can be formed on the inner adjusting block 71, the heat dissipation holes are fan-shaped and are communicated with the honeycomb cover 5, a heat dissipation area 712 is formed in an area of the inner adjusting block 71 containing the heat dissipation holes, a sealing area 713 is formed in an area where the heat dissipation holes are not formed, and heat dissipation of the battery can be facilitated by the arrangement of the heat dissipation area 712.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A protection structure of a battery comprises a protection shell (4), wherein a battery cell (9) is wrapped inside the protection shell (4), an opening is formed in a first end of the protection shell (4) and used for taking and placing the battery cell (9), a second end of the protection shell (4) is closed, and a positive and negative electrode mechanism used for outputting electric energy is arranged on the battery cell (9), and is characterized in that a protection cover (7) is installed at the first end of the protection shell (4);
the protective cover (7) is provided with a trigger mechanism and a control mechanism;
the trigger mechanism comprises a trigger component and a connecting component; the connecting assembly is used for being electrically connected with the positive and negative electrode mechanisms to output or input electric energy inside the battery cell (9); the trigger assembly has two working states, namely a use state and a trigger state, when the trigger assembly is in the use state, the electrical connection between the connecting assembly and the positive and negative electrode mechanisms can be ensured, and when the trigger assembly is in the trigger state, the electrical connection between the connecting assembly and the positive and negative electrode mechanisms can be cut off;
the trigger assembly includes: the self-rotation module has self-rotation potential energy when in an initial state and is respectively electrically connected with the connecting assembly and the positive and negative electrode mechanisms;
when the trigger assembly is in a use state, the self-rotation module is in an initial position, and the limiting module locks the relative position between the protective cover (7) and the self-rotation module;
when the trigger assembly is in a trigger state, the limiting module releases the locking of the relative position between the protective cover (7) and the self-rotating module, the self-rotating module rotates under the potential energy state of the self-rotating module, and the electrical connection between the connecting assembly and the positive and negative electrode mechanisms is disconnected;
the connecting assembly comprises a first connecting module and a second connecting module;
the first connecting module is arranged on the protective cover (7);
the second connecting module is arranged on the self-rotating module, when the self-rotating module is in an initial state, the first connecting module, the second connecting module and the positive and negative mechanisms are sequentially communicated, and when the position of the self-rotating module is relieved from limitation, a broken circuit is formed among the first connecting module, the second connecting module and the positive and negative mechanisms;
the control mechanism is used for switching the trigger assembly from a use state to a trigger state when the battery cell (9) is in an abnormal state.
2. A battery protection arrangement according to claim 1, wherein said control means comprises a high temperature drive assembly and a short circuit overload drive assembly;
the high-temperature driving assembly is used for driving the limiting module to release the limiting of the self-rotating module when the battery cell (9) is overheated;
the short circuit overload driving assembly is used for driving the limiting module to relieve the limitation on the self-rotation module when the battery cell (9) is in short circuit or is overloaded.
3. A battery shielding structure according to claim 2, characterized in that said self-rotation module comprises an inner regulation block (71) and at least one helical spring (72);
the inner adjusting block (71) is located inside the protective cover (7), the inner adjusting block (71) is in rotating connection with the protective cover (7) through a rotating shaft, the axis of the rotating shaft extends along a first direction, and the first direction is towards a second end from a first end of the protective shell (4);
one end of the spiral spring (72) is connected with the protective cover (7), the other end of the spiral spring is connected with the rotating shaft, and the spiral spring (72) stores energy for promoting the rotating shaft to rotate.
4. A protection structure of battery according to claim 3, characterized in that said limit module comprises a protection slider (8) and an elastic element;
the protective sliding block (8) is in sliding connection with the protective cover (7) along a first direction;
the elastic piece is movably arranged on the inner wall of the protective cover (7), when the trigger assembly is in a use state, a first end of the elastic piece is abutted against the protective sliding block (8), a second end of the elastic piece is abutted against the inner adjusting block (71), the first end of the elastic piece points to the second end in a second direction, and the second direction is perpendicular to the first direction;
the protection slide block (8) is provided with a dislocation groove (81), when the trigger assembly is in a trigger state, the elastic piece falls into the dislocation groove (81), and the elastic piece and the conflict of the inner adjusting block (71) disappear.
5. The battery protection structure according to claim 4, wherein the high temperature driving assembly comprises a temperature sensing module (6), the temperature sensing module (6) is disposed right below the protection slider (8) along the first direction, and when the battery cell (9) works normally, the temperature sensing module (6) does not contact the protection slider (8); when the battery core (9) is heated, the temperature sensing module (6) can lift up the protective sliding block (8) along the first direction until the elastic piece falls into the dislocation groove (81).
6. The battery protection structure according to claim 5, wherein the short circuit overload driving assembly comprises a jacking module and a blocking module;
the jacking module has potential energy for jacking the protective sliding block (8) along a first direction;
electric core (9) normal during operation, block the relative position that the module can lock between protection slider (8) and protective cover (7), electric core (9) short circuit or when transshipping, block that the module removes the relative position locking between protection slider (8) and protective cover (7), protection slider (8) rise under the potential energy effect of jacking module, until the elastic component falls into dislocation groove (81).
7. The battery protection structure according to claim 5, further comprising a honeycomb cover (5), wherein the honeycomb cover (5) is disposed at the first end of the protective casing (4) and is used for encapsulating the battery core (9); a heat dissipation area (712) is formed on the inner adjusting block (71), heat dissipation holes are formed in the heat dissipation area (712), and the heat dissipation holes are communicated with the honeycomb cover (5).
8. The battery protection structure according to claim 7, wherein the honeycomb cover (5) is provided with an inner electrode block set (51), the inner electrode block set (51) comprises at least one positive electrode block and at least one negative electrode block, the positive electrode block is used for being electrically connected with a positive electrode of the battery cell (9), and the negative electrode block is used for being electrically connected with a negative electrode of the battery cell (9).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211225028.6A CN115295971B (en) | 2022-10-09 | 2022-10-09 | Protective structure of battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211225028.6A CN115295971B (en) | 2022-10-09 | 2022-10-09 | Protective structure of battery |
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| CN115295971B true CN115295971B (en) | 2022-12-20 |
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Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102754245B (en) * | 2011-04-18 | 2014-02-19 | 华为终端有限公司 | Battery, battery component and subscriber equipment |
| US20180166677A1 (en) * | 2016-12-11 | 2018-06-14 | Blue Solutions Canada Inc. | Battery Protection Device |
| CN109216641B (en) * | 2017-06-30 | 2020-10-23 | 比亚迪股份有限公司 | Battery protection cover plate assembly, power battery and electric automobile |
| CN209896119U (en) * | 2019-01-21 | 2020-01-03 | 欣旺达电动汽车电池有限公司 | Secondary battery |
| CN111916596B (en) * | 2020-06-11 | 2022-07-26 | 安徽正熹标王新能源有限公司 | Battery protection device |
| CN112259859A (en) * | 2020-10-13 | 2021-01-22 | 建德希傅电子科技有限公司 | Automobile lithium battery pack protection device |
| CN213483871U (en) * | 2020-11-12 | 2021-06-18 | 惠州天力新能源科技有限公司 | Lithium battery capable of quickly combining battery packs |
| CN112467313A (en) * | 2020-12-09 | 2021-03-09 | 河南克能新能源科技有限公司 | Battery module structure with self-breaking protection function |
| DE102021102049A1 (en) * | 2021-01-29 | 2022-08-04 | Audi Aktiengesellschaft | Battery arrangement, motor vehicle and method for operating a battery arrangement |
| CN113629363A (en) * | 2021-08-10 | 2021-11-09 | 天科新能源有限责任公司 | Battery cell structure and energy storage module for preventing thermal runaway from rapidly expanding |
| CN215869698U (en) * | 2021-09-08 | 2022-02-18 | 深圳辉力电子有限公司 | Short circuit trigger diaphragm lithium ion battery |
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