CN115347297B - Detachable battery core module and echelon utilization method - Google Patents
Detachable battery core module and echelon utilization method Download PDFInfo
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- CN115347297B CN115347297B CN202211000958.1A CN202211000958A CN115347297B CN 115347297 B CN115347297 B CN 115347297B CN 202211000958 A CN202211000958 A CN 202211000958A CN 115347297 B CN115347297 B CN 115347297B
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- 238000000034 method Methods 0.000 title claims description 33
- 238000005520 cutting process Methods 0.000 claims description 29
- 238000004880 explosion Methods 0.000 claims description 18
- 239000012774 insulation material Substances 0.000 claims description 14
- 239000011810 insulating material Substances 0.000 claims description 6
- 125000006850 spacer group Chemical group 0.000 claims 2
- 238000005192 partition Methods 0.000 description 26
- 230000005611 electricity Effects 0.000 description 14
- 238000010586 diagram Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000110 cooling liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01M50/317—Re-sealable arrangements
-
- 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
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
-
- 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
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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
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
-
- 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)
- Battery Mounting, Suspending (AREA)
Abstract
The invention provides a detachable cell module, which relates to the technical field of batteries and comprises: a frame having an explosion-proof passage, the frame having a notch for surrounding a portion forming the explosion-proof passage; the battery cores are positioned in the frame and are positioned at two sides of the explosion-proof channel in the first direction, the first direction is perpendicular to the length direction of the explosion-proof channel, each battery core is provided with an explosion-proof valve, and each battery core is communicated with the explosion-proof channel through the explosion-proof valve; wherein in the second direction, the frame is separable along the slot, the first direction being perpendicular to the second direction. Through set up the notch on the frame that surrounds the explosion-proof passageway that forms, can cut apart into two sub-electric core modules with electric core module along the explosion-proof passageway, improve the utilization ratio of electric core module.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to an explosion-proof battery cell module and a ladder utilization method.
Background
With the popularization of new energy electric vehicles, the safety and cruising ability of the battery cell module become important points of people. The lithium ion battery can generate high-temperature high-pressure gas in the use process, and the explosion-proof valve is arranged to automatically open and release pressure under the condition that the internal pressure of the battery cell is overlarge. At present, after a single cell in a cell module is in thermal runaway failure, the whole cell module needs to be replaced, so that waste of the cell is caused, and material and economy are lost.
Disclosure of Invention
The invention provides a detachable battery cell module and a gradient utilization method, which are used for solving the problem of how to improve the utilization rate of the battery cell module.
The embodiment of the invention provides a detachable cell module, which comprises: a frame having an explosion-proof passage, the frame having a notch for surrounding a portion forming the explosion-proof passage; the battery cores are positioned in the frame and are positioned on two sides of the explosion-proof channel in a first direction, the first direction is perpendicular to the length direction of the explosion-proof channel, each battery core is provided with an explosion-proof valve, and each battery core is communicated with the explosion-proof channel through the explosion-proof valve; wherein in a second direction, the frame is separable along the slot, the first direction being perpendicular to the second direction.
Further, the explosion-proof channel is provided with a first sub explosion-proof channel and a second sub explosion-proof channel, and the first sub explosion-proof channel and the second sub explosion-proof channel are arranged at intervals in a first direction; the battery cell on one side of the explosion-proof channel is communicated with the first sub explosion-proof channel through the explosion-proof valve, the battery cell on the other side of the explosion-proof channel is communicated with the second sub explosion-proof channel through the explosion-proof valve, and the notch is positioned between the first sub explosion-proof channel and the second sub explosion-proof channel.
Further, the frame includes a first bulkhead between the first sub-explosion-proof channel and the second sub-explosion-proof channel, and the slot is located on the first bulkhead.
Further, the frame includes: the second baffle and the third baffle, second baffle and third baffle are located first sub explosion-proof passageway with between the sub explosion-proof passageway of second, and set up at first direction interval, the notch is located between second baffle and the third baffle.
Further, the number of the notches is a plurality, and at least part of the notches are arranged at intervals in the first direction.
Further, the frame further comprises an upper cover plate and a lower cover plate, wherein the upper cover plate and the lower cover plate are respectively provided with a plurality of heat exchange channels, and the heat exchange channels are distributed on two sides of the explosion-proof channel.
The embodiment of the invention also provides a gradient utilization method of the battery cell module, which is used for controlling the battery cell module, and the battery cell module also comprises a sensor, and the gradient utilization method comprises the following steps: acquiring state information of the battery cell module by the sensor; determining a damaged side in the battery cell module based on the state information, wherein the damaged side is one side where any damaged battery cell in two sides of the explosion-proof channel is located; the cell module is cut along the notch to separate the damaged side from the remainder of the cell module.
Further, the explosion-proof channel has a first sub-explosion-proof channel and a second sub-explosion-proof channel, the first sub-explosion-proof channel and the second sub-explosion-proof channel are arranged at intervals in a first direction, and the frame is used for surrounding the portion forming the first sub-explosion-proof channel and has a first notch, and the frame is used for surrounding the portion forming the second sub-explosion-proof channel and has a second notch, and the cutting the cell module along the notch comprises: determining distances from the first sub explosion-proof channel and the second sub explosion-proof channel to the damaged side respectively in the first direction; the cell module is cut along the first notch or the second notch adjacent to the damaged side.
Further, the determining the distance of the first sub-explosion-proof channel and the second sub-explosion-proof channel to the damaged side in the first direction and between cutting the cell module along the first notch or the second notch near the damaged side, the cutting the cell module along the notch further comprises: a thermal insulation material is added to the explosion proof channel.
Further, the adding of the insulating material in the explosion-proof channel further includes: an insulating material is added in the first sub-explosion-proof channel or the second sub-explosion-proof channel remote from the damaged side.
The embodiment of the invention provides a detachable cell module, which comprises: the battery cell comprises a frame and a plurality of battery cells, wherein the frame is provided with an explosion-proof channel, and a part of the frame for surrounding the explosion-proof channel is provided with a notch; the battery cores are positioned in the frame and at two sides of the explosion-proof channel in a first direction, the first direction is perpendicular to the length direction of the explosion-proof channel, each battery core is provided with an explosion-proof valve, and each battery core is communicated with the explosion-proof channel through the explosion-proof valve; wherein in the second direction, the frame is separable along the slot, the first direction being perpendicular to the second direction. Through setting up explosion-proof passageway, can effectively be with follow explosion-proof valve exhaust high temperature high pressure gas quick discharge electricity core module, avoid electricity core module to produce danger, further share same explosion-proof passageway with the electricity core of explosion-proof passageway both sides, can effectively improve the space utilization of electricity core module, the rethread sets up the notch on the frame that surrounds the explosion-proof passageway that forms, can cut apart into two sub-electricity core modules with electricity core module along explosion-proof passageway, carries out effectual echelon utilization to electricity core module, improves the utilization ratio of electricity core module.
Drawings
Fig. 1 is a schematic diagram of an exploded view of a detachable cell module according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a detachable battery cell module according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a frame of a detachable battery cell module according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another detachable battery cell module according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another detachable battery cell module according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another detachable battery cell module according to an embodiment of the present invention;
fig. 7 is a schematic diagram of heat exchange flow of a detachable cell module according to an embodiment of the present invention;
fig. 8 is a schematic flow chart of a method for gradient utilization of a cell module according to an embodiment of the present invention;
fig. 9 is a schematic flow chart of another cascade utilization method of a battery cell module according to an embodiment of the present invention;
fig. 10 is a schematic flow chart of another cascade utilization method of a battery cell module according to an embodiment of the present invention;
fig. 11 is a schematic flow chart of another ladder utilization method of a battery cell module according to an embodiment of the present invention.
Description of the reference numerals
1. A battery cell module; 10. a frame; 11. an explosion-proof channel; 111. a first sub-explosion-proof channel; 112. a second sub-explosion-proof channel; 12. a partition plate; 121. a first separator; 122. a second separator; 123. a third separator; 124. a relief hole; 125. a cell baffle; 13. a cover plate; 131. an upper cover plate; 132. a lower cover plate; 133. a heat exchange channel; 14. a backing plate; 15. a notch; 20. a battery cell; 21. an explosion-proof valve; 22. an electrode terminal; 30. an end plate; 40. a clamping plate; 50. a battery cell frame; 60. bridging the busbar; 70. a side plate; 80. and integrating the end plates.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The individual features described in the specific embodiments can be combined in any suitable manner, without contradiction, for example by combination of different specific features, to form different embodiments and solutions. Various combinations of the specific features of the invention are not described in detail in order to avoid unnecessary repetition.
In the following description, references to the term "first/second/are merely to distinguish between different objects and do not indicate that the objects have the same or a relationship therebetween. It should be understood that references to orientations of "above", "below", "outside" and "inside" are all orientations in normal use, and "left" and "right" directions refer to left and right directions illustrated in the specific corresponding schematic drawings, and may or may not be left and right directions in normal use.
It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. The term "coupled," unless specifically indicated otherwise, includes both direct and indirect coupling.
In a specific embodiment, the battery cell module is applicable to any type of electric automobile, and by way of example, the battery cell module can be applicable to an electric car as a power source of the electric car; the battery cell module can be applied to an electric motor coach as a power source of the electric motor coach. The cell module is suitable for mounting any shape of cell, and illustratively, the cell module can mount a cylindrical cell; the cell module may be provided with square cells, for example. For convenience of explanation, the following description will be given by taking the example that the battery cell module is suitable for an electric car, and taking the example that the battery cell of the explosion-proof battery cell module is a cylindrical battery cell, and the structure of the battery cell module is exemplified.
In some embodiments, as shown in connection with fig. 1 and 2, the battery module 1 includes: a frame 10 and a plurality of cells 20. The frame 10 has an explosion-proof channel 11, and the portion of the frame 10 for surrounding the explosion-proof channel 11 has a notch 15. The explosion-proof channel 11 can be understood as a structure capable of rapidly discharging the high-temperature and high-pressure gas out of the battery cell module 1 through the explosion-proof channel 11 when the battery cell 20 generates the high-temperature and high-pressure gas in thermal runaway, so that the danger of fire and even explosion caused by the aggregation of the high-temperature and high-pressure gas in the battery cell module 1 is effectively avoided. The explosion-proof channel 11 is a long-strip channel, which may be a channel built by the frame 10, or a channel formed by the cell 20 and the frame 10 in a matching manner, and the cross section of the channel is not limited, and may be circular or square. The part of the frame 10 for surrounding the explosion-proof channel 11 is provided with a notch 15, the notch 15 is used for separating the cell module 1, the specific setting position and the specific shape and size of the notch 15 are not limited, and the purpose of separating the cell module 1 as a positioning point can be achieved. For example, the notch 15 may be a V-shaped notch 15 to facilitate precise positioning of the cutting device.
The plurality of electric cells 20 are located in the frame 10 and located at both sides of the explosion-proof channel 11 in a first direction (a direction indicated by an arrow in fig. 1 and 2) perpendicular to the length direction of the explosion-proof channel 11, each electric cell 20 has an explosion-proof valve 21, and each electric cell 20 communicates with the explosion-proof channel 11 through the explosion-proof valve 21. In order to improve the space utilization rate of the battery cell module 1, the plurality of battery cells 20 share the same explosion-proof channel 11, the battery cells 20 are arranged on two sides of the explosion-proof channel 11 along the first direction, each side of the battery cells 20 are arranged side by side along the length direction of the explosion-proof channel 11, the specific number is not limited, the specific number can be determined according to practical conditions, the first direction is perpendicular to the length direction of the explosion-proof channel 11, and the length direction can be understood as the direction in which one side of the longest dimension of the explosion-proof channel 11 is located. It should be noted that the shape and the volume of the battery cell 20 may be determined according to practical needs, and the battery cell 20 may be, for example, a cylindrical battery cell, where a plurality of cylindrical battery cells are disposed side by side and distributed on two sides of the explosion-proof channel 11. For example, the battery cell 20 may be a square battery cell, and a plurality of square battery cells are arranged side by side and distributed on two sides of the explosion-proof channel 11. The battery cell 20 is in use, high temperature and high pressure gas possibly appears, through setting up explosion-proof valve 21, under the too big condition of battery cell 20 internal pressure, explosion-proof valve 21 opens the pressure release voluntarily to prevent the problem that explosion appears in battery cell 20, the quick discharge battery cell module 1 of high temperature and high pressure gas through explosion-proof channel 11 simultaneously avoids battery cell module 1 to produce danger. Each of the explosion-proof valves 21 of the battery cells 20 is communicated with the explosion-proof channel 11, the communication can be understood that the high-temperature and high-pressure gas exhausted through the explosion-proof valve 21 can enter the explosion-proof channel 11, any structure capable of realizing the communication function meets the requirements of the scheme, in order to improve the exhaust efficiency of the high-temperature and high-pressure gas, the explosion-proof valve 21 can be opposite to the explosion-proof channel 11, the communication can be understood that the explosion-proof valve 21 is opened, and the high-temperature and high-pressure gas directly enters the explosion-proof channel 11.
The specific form of arrangement of the battery cells 20 and the location of arrangement of the explosion-proof valve 21 are not limited herein. The battery cell 20 is a square battery cell, the square battery cells are arranged in the vertical direction side by side, the explosion-proof valve 21 is arranged on the side surface of the square battery cell, the space between the square battery cells arranged on two sides side by side forms the explosion-proof channel 11, the explosion-proof valve 21 is opened, high-temperature and high-pressure gas directly enters the explosion-proof channel 11, and the explosion-proof valve 21 of the battery cell 20 on the other side of the explosion-proof channel 11 cannot be impacted along the first direction. The battery cell 20 is a cylindrical battery cell, the cylindrical battery cells are arranged in the side-by-side vertical direction, the explosion-proof valve 21 is arranged on the side surface of the cylindrical battery cell, and the specific arrangement form is the same as that of the square battery cell, and the detailed description is omitted herein. In order to further improve the space utilization rate of the battery cell module 1, the battery cell 20 can be horizontally arranged, the explosion-proof valve 21 is arranged at one end of the battery cell 20, the battery cell 20 can be overlapped in the vertical direction in the frame 10, and the base plate 14 can be arranged between two adjacent rows of battery cells 20 in the vertical direction, so that the space utilization rate is improved, and it is emphasized that the battery cell 20 is provided with multiple layers in the vertical direction, the battery cell 20 positioned in the middle is not easy to exchange heat, and the base plate 14 is provided with a heat exchange runner for assisting the middle battery cell 20 to exchange heat and is used for effectively exchanging heat through the heat exchange runner. Meanwhile, in order to further improve the heat exchange uniformity, the heat exchange flow passages of the pad 14 may be in communication with other heat exchange passages, and particularly other heat exchange passages will be described below.
In order to facilitate connection of the two side electric cores 20, the electric core module 1 further includes a bridging busbar 60, and the bridging busbar 60 can connect the electrode terminals 22 of the electric cores 20 on two sides of the explosion-proof channel 11, so that the electric cores 20 are the same group of power sources. The specific connection condition and connection manner of the bridging busbar 60 are not limited, and it should be emphasized that the bridging busbar 60 needs to be connected from one side to the other side of the explosion-proof channel 11, and in order to avoid a short circuit, the connection line of the bridging busbar 60 needs to be insulated to avoid the bridging busbar 60 contacting the battery cell 20, and the battery cell module 1 further includes a clamping plate 40, where the clamping plate 40 is disposed at one end of the explosion-proof channel 11 of the battery cell module 1, and the bridging busbar 60 is located on one side of the clamping plate 40, so that the clamping plate 40 is located between the bridging busbar 60 and the battery cell 20, thereby preventing the short circuit.
In order to limit the battery cells 20, and prevent short circuits between the battery cells 20, the battery cell module 1 further comprises a battery cell frame 50, the battery cell frame 50 is provided with a plurality of through holes, each battery cell 20 faces to one through hole, the electrode end 22 of each battery cell 20 can penetrate through the through hole, and meanwhile, the battery cell frame 50 is abutted to the electrode end 22 of the battery cell 20, so that the battery cell frame 50 is fixed on the battery cell module 1, the movement of the battery cell 20 is effectively limited, and meanwhile, the short circuits of the battery cell 20 are avoided. In order to further protect the battery cell 20 from being extruded and avoid danger caused by false collision of the connection circuit of the battery cell 20 with other parts, the battery cell module 1 further comprises side plates 70, wherein the side plates 70 are positioned at two ends of the frame 10 in the first direction, and the battery cell frame 50 is protected in the side plates 70.
Wherein the frame 10 is separable along the slot 15 in a second direction, the first direction being perpendicular to the second direction. Specifically, the notch 15 is disposed on the frame 10 for surrounding the explosion-proof channel 11, and in the second direction, the second direction is the length direction of the explosion-proof channel 11, and the battery cells 20 on two sides of the explosion-proof channel 11 can be separated by separating the notch 15, so that the battery cell module 1 is separated into two sub-battery cell modules. The two sub-cell modules retain the complete battery performance of the cell module 1 and can be used as independent power sources. The sub-cell module is provided with an output interface, the output interface comprises a positive output interface and a negative output interface, and the positive output interface and the negative output interface are positioned at two ends of the cell module 1 in the length direction. To facilitate the cutting separation, the notches 15 are provided at both ends of the notch 15 in the longitudinal direction of the explosion-proof passage 11. Cutting accuracy can be effectively improved through cutting at two ends, and meanwhile, cutting speed can be accelerated. While a plurality of notches 15 may be provided in the first direction, the notches 15 may be effectively selected depending on the cutting location to better protect the cells 20 from damage, the specific construction of which will be described in detail below.
The embodiment of the invention provides a detachable cell module, which comprises: the battery cell comprises a frame and a plurality of battery cells, wherein the frame is provided with an explosion-proof channel, and a part of the frame for surrounding the explosion-proof channel is provided with a notch; the battery cores are positioned in the frame and at two sides of the explosion-proof channel in a first direction, the first direction is perpendicular to the length direction of the explosion-proof channel, each battery core is provided with an explosion-proof valve, and each battery core is communicated with the explosion-proof channel through the explosion-proof valve; wherein in the second direction, the frame is separable along the slot, the first direction being perpendicular to the second direction. Through setting up explosion-proof passageway, can effectively be with follow explosion-proof valve exhaust high temperature high pressure gas quick discharge electricity core module, avoid electricity core module to produce danger, further share same explosion-proof passageway with the electricity core of explosion-proof passageway both sides, can effectively improve the space utilization of electricity core module, the rethread sets up the notch on the frame that surrounds the explosion-proof passageway that forms, can cut apart into two sub-electricity core modules with electricity core module along explosion-proof passageway, carries out effectual echelon utilization to electricity core module, improves the utilization ratio of electricity core module.
In some embodiments, as shown in connection with fig. 2 and 3, the explosion proof channel 11 has a first sub-explosion proof channel 111 and a second sub-explosion proof channel 112, the first sub-explosion proof channel 111 and the second sub-explosion proof channel 112 being spaced apart in a first direction (as indicated by the arrow in fig. 2). Specifically, in order to avoid the damage of the high-temperature and high-pressure gas generated by the thermal runaway of the battery cells 20 to other battery cells 20, the explosion-proof channel 11 is divided into at least two channels, namely a first sub explosion-proof channel 111 and a second sub explosion-proof channel 112, wherein the first sub explosion-proof channel 111 and the second sub explosion-proof channel 112 are arranged at intervals in the first direction, and the high-temperature and high-pressure gas generated by the thermal runaway of any one battery cell 20 is not directly sprayed onto the battery cell 20 on the other side of the explosion-proof channel 11 when being sprayed along the first direction.
The battery core 20 on one side of the explosion-proof channel 11 is communicated with the first sub explosion-proof channel 111 through the explosion-proof valve 21, the battery core 20 on the other side of the explosion-proof channel 11 is communicated with the second sub explosion-proof channel 112 through the explosion-proof valve 21, and the notch 15 is positioned between the first sub explosion-proof channel 111 and the second sub explosion-proof channel 112. It may be specifically understood that, in the first direction, the explosion-proof channel 11 is divided into a first sub-explosion-proof channel 111 and a second sub-explosion-proof channel 112, a shielding structure exists between the first sub-explosion-proof channel 111 and the second sub-explosion-proof channel 112, and the shielding structure may be any structure capable of preventing high-temperature and high-pressure gas injected from one of the battery cells 20 through the explosion-proof valve 21 from impacting the explosion-proof valve 21 of the battery cell 20 on the other side of the explosion-proof channel 11 along the first direction, and an exemplary shielding structure may be a partition plate capable of disconnecting the first sub-explosion-proof channel 111 from the second sub-explosion-proof channel 112, and when the battery cells 20 close to the first sub-explosion-proof channel 111 undergo thermal runaway, the high-temperature and high-pressure gas generated from the battery cells 20 is injected into the first sub-explosion-proof channel 111 along the first direction, and the high-temperature and high-pressure gas will not flow into the second sub-explosion-proof channel 112, so that the battery cells 20 connected to the second sub-explosion-proof channel 112 will not be damaged. Exemplary, the shielding structure may be a hollowed-out plate, and the hollowed-out plate may communicate the first sub-explosion-proof channel 111 with the second sub-explosion-proof channel 112, so that when the battery cell 20 close to the first sub-explosion-proof channel 111 is thermally out of control, the high-temperature and high-pressure gas generated by the battery cell 20 is sprayed along the first direction to directly impact on the hollowed-out plate, thereby avoiding direct impact on the explosion-proof valve 21 of the battery cell 20 communicated with the second sub-explosion-proof channel 112. The notch 15 is located between the first sub-explosion-proof channel 111 and the second sub-explosion-proof channel 112, separating the cell modules 1 along the notch 15 to form two sub-cell modules, each sub-cell module still having an independent explosion-proof channel 11.
In some embodiments, as shown in connection with fig. 2 and 3, the frame 10 includes a first bulkhead 121, the first bulkhead 121 being positioned between the first sub-explosion proof channel 111 and the second sub-explosion proof channel 112, and the slot 15 being positioned on the first bulkhead 121. It will be understood that, in particular, in order to further prevent the other cells 20 from being damaged by the high-temperature and high-pressure gas ejected from the explosion-proof valve 21 when the individual cells 20 are thermally out of control, the frame 10 is provided with a partition 12, the partition 12 includes a first partition 121, the first partition 121 divides the explosion-proof channel 11 into a first sub-explosion-proof channel 111 and a second sub-explosion-proof channel 112, and the notch 15 is located on the first partition 121. The cell modules 1 are separated along the notch 15, and the first partition plate 121 is divided into 2 pieces, so that the separated sub-cell modules are all provided with explosion-proof channels 11. The partition plate 12 may further include a cell baffle 125, where a space between the cell baffle 125 and the first partition plate 121 is a sub explosion-proof channel, and the cell baffle 125 is provided with a relief hole 124, so that, for facilitating high-temperature and high-pressure gas passing through the explosion-proof valve 21 to quickly enter the explosion-proof channel 11, the explosion-proof valve 21 is adjacent to the relief hole 124, where the adjacent step includes that a certain interval is between the explosion-proof valve 21 and the relief hole 124, and also includes that the explosion-proof valve 21 is opposite to the relief hole 124 in the first direction, and there is no interval between the two. The shape and the size of the relief hole 124 are not limited, and it is sufficient that the opening of the explosion-proof valve 21 is not affected, for example, the explosion-proof valve 21 is circular, the relief hole 124 is also circular, the size of the relief hole 124 is slightly larger than the size of the explosion-proof valve 21, and the valve of the explosion-proof valve 21 directly passes through the relief hole 124 when the explosion-proof valve 21 is opened to the first sub explosion-proof channel 111 and is not affected.
In some embodiments, as shown in fig. 4, the frame 10 includes: the second and third partitions 122 and 123 are located between the first and second sub explosion-proof passages 111 and 112 with a spacing in the first direction, and the notch 15 is located between the second and third partitions 122 and 123. It will be understood that, in particular, the frame 10 is provided with the partition 12, the partition 12 includes the second partition 122 and the third partition 123, and is disposed at intervals along the first direction, the second partition 122 and the third partition 123 are located between the first sub-explosion-proof channel 111 and the second sub-explosion-proof channel 112, the space formed by the second partition 122 and the cell 20 surrounding the first sub-explosion-proof channel 111, the space formed by the third partition 123 and the cell 20 surrounding the second sub-explosion-proof channel 112, a space is also reserved between the second partition 122 and the third partition 123, the notch 15 is located between the second partition 122 and the third partition 123, the cell module 1 is separated along the notch 15, and the second partition 122 is separated from the third partition 123, so that the separated sub-cell module groups have the independent first sub-explosion-proof channel 111 and the second sub-explosion-proof channel 112.
In some embodiments, as shown in fig. 5, in order to facilitate cutting the battery cell module 1 without damaging the battery cells 20 during cutting, the number of the slots 15 is plural, and at least some of the slots 15 are disposed at intervals in the first direction. Specifically, when the battery cell module 1 needs to be cut, the battery cell 20 on one side of avoiding the cutting process to normally use the battery cell module 1 causes the damage, sets up a plurality of notches 15 along first direction, can select suitable notch 15 to cut, further in order to improve cutting accuracy and cutting speed, notch 15 all sets up notch 15 along the both ends on the length direction of explosion-proof passageway 11, cuts through both ends and can effectively improve cutting accuracy, also can accelerate cutting rate simultaneously.
In some embodiments, as shown in connection with fig. 3 and 6, the frame 10 further includes an upper cover plate 131 and a lower cover plate 132, and each of the upper cover plate 131 and the lower cover plate 132 is provided with a plurality of heat exchanging channels 133, wherein the plurality of heat exchanging channels 133 are distributed at both sides of the explosion-proof channel 11. Specifically, in order to protect the battery cells 20 from being extruded, the frame 10 further has a cover plate 13, for example, the battery cells 20 are horizontally arranged side by side, and for more comprehensive protection, the cover plate 13 includes an upper cover plate 131 and a lower cover plate 132, and the cover plate 13 can be correspondingly designed according to different shapes of the battery cells 20, so that the cover plate 13 is more attached to the battery cells 20, thereby better protecting the battery cells 20. The battery cell 20 is a cylindrical battery cell, the upper cover plate 131 and the lower cover plate 132 are in a wave shape, so that the upper cover plate 131 and the lower cover plate 132 are attached to the periphery of the cylindrical battery cell, the battery cell 20 is prevented from shaking, and in order to further fix and exchange heat to the cylindrical battery cell, heat conduction structural adhesive is injected between the cylindrical battery cell and the upper cover plate 131 and the lower cover plate 132, so that the heat exchange efficiency can be improved while the cylindrical battery cell is prevented from shaking.
Further, in order to exchange heat to the electric core 20, the upper cover plate 131 and the lower cover plate 132 are provided with a plurality of heat exchange channels 133, for example, the upper cover plate 131 on one side of the explosion-proof channel 11 is provided with the heat exchange channels 133, and the lower cover plate 132 on the other side of the explosion-proof channel 11 is provided with the heat exchange channels 133. In order to improve heat exchange efficiency, the heat exchange channels 133 that upper cover plate 131 and lower cover plate 132 all set up, in order to guarantee the holistic heat exchange homogeneity of electric core module 1 simultaneously, electric core module 1 still includes end plate 30, and end plate 30 has the runner chamber, and the runner chamber communicates with heat exchange channels 133 in upper cover plate 131 and the lower cover plate 132 respectively, and the concrete structure in runner chamber does not do not limit, satisfies heat exchange channels 133 in upper cover plate 131 and heat exchange channels 133 intercommunication in lower cover plate 132 can. For example, the upper cover plate 131 is provided with a heat exchange inlet, the lower cover plate 132 is provided with a heat exchange outlet, the cooling liquid flows into the upper cover plate 131 from the heat exchange inlet, flows into the runner cavity of the end plate 30 from the upper cover plate 131, flows into the heat exchange channel 133 of the lower cover plate 132 through the runner cavity, and finally flows out from the heat exchange outlet of the lower cover plate 132. Similarly, the cooling liquid may flow in from the lower cover plate 132 and flow out from the upper cover plate 131. It should be noted that, in order to facilitate the heat exchange function after the disassembly of the battery core module 1, the heat exchange channels 133 on two sides of the explosion-proof channel 11 may be independent heat exchange systems, so that the plurality of heat exchange channels 133 are distributed on two sides of the explosion-proof channel 11, that is, each side of the explosion-proof channel 11 has independent heat exchange inlets and heat exchange outlets.
In order to improve the integration level of the battery cell module 1, as shown in fig. 7, the other end of the battery cell module 1 is provided with an integrated end plate 80, and the integrated end plate 80 further comprises a heat exchange inlet and a heat exchange outlet, wherein the heat exchange inlet is communicated with one end of the heat exchange channel 133, and the heat exchange outlet is communicated with the other end opposite to the one end of the heat exchange channel 133. It will be appreciated that the cooling fluid enters the cell module 1 through the heat exchange inlet of the integrated end plate 80 and then flows into the heat exchange channel 133, and after flowing through the end plate 30, flows through the heat exchange outlet of the integrated end plate 80 through the heat exchange channel 133, and the specific flow direction is shown by the arrow in fig. 7, so as to realize heat exchange of the cell 20.
In order to further accelerate the high-temperature and high-pressure gas from exiting the battery cell module 1, exhaust grooves communicated with the explosion-proof channel 11 are provided in the upper cover plate 131 and the lower cover plate 132.
The present embodiment provides a gradient utilization method of a battery cell module, which is applicable to a battery cell module as shown in any one of fig. 1 to 7. Referring to fig. 8, fig. 8 is a schematic flow chart of a cascade utilization method of a battery cell module according to an embodiment of the invention, where the flow chart of the cascade utilization method includes:
step S1, acquiring state information of the battery cell module by a sensor.
Specifically, the battery cell module is used as a power source of the electric vehicle, the electric quantity and the voltage of the battery cell module directly influence the power output of the electric vehicle, and the electric vehicle needs to acquire the state information of the battery cell module in real time so as to reasonably plan the use of the electric vehicle. Monitoring the state of the battery cell module in real time through various sensors, for example, detecting the current state of the battery cell module through a current sensor; for example, the voltage state of the cell module is detected by a voltage sensor. The state of the battery cell module can be effectively judged through the detected numerical value, and the battery cell module can be judged to be damaged through sudden change of the voltage or the current of the battery cell module, so that the battery cell module needs to be replaced and maintained in time.
And S2, determining a damaged side in the battery cell module based on the state information, wherein the damaged side is one side where any damaged battery cell in two sides of the explosion-proof channel is located.
Specifically, after the state information of the battery cell module is obtained through the sensor, the battery cell module is judged to be damaged according to the state information, the damaged battery cell module is detached from the electric vehicle for inspection, the battery cell module is formed by arranging and combining a plurality of battery cells, and the specific position of the damage of the battery cell module is judged by inspecting the battery cells one by one. And determining the damaged side in the battery cell module according to the damaged position of the battery cell, for example, only one side of the battery cell of the explosion-proof channel is damaged, and the side where the damaged battery cell is positioned is the damaged side, and the other side is the normal side. For example, if the battery cells on both sides of the explosion-proof channel are damaged, both sides of the explosion-proof channel are damaged sides, and the battery cell module needs to be replaced integrally.
Step S3, cutting the cell module along the notch to separate the damaged side from the rest of the cell module.
Specifically, for the case where the cell module is damaged on only one side, the cell module is cut along the notch to separate the damaged side from the rest of the cell module, thereby retaining the cell module without damage. The two sub-cell modules at two sides of the cell module retain the complete battery performance of the cell module 1, can be used as an independent power supply, and the cell at the normal side is installed into an electric vehicle for use or reserved for other use.
In some embodiments, as shown in fig. 9, fig. 9 provides a schematic flow chart of another method for cascade utilization of the cell module, which differs from the method for cascade utilization provided in fig. 8 in that step S3 in fig. 8 includes cutting the cell module along the notch:
step S31, determining the distance between the first sub explosion-proof channel and the second sub explosion-proof channel and the damage side respectively in the first direction.
Specifically, the explosion-proof channel has a first sub explosion-proof channel and a second sub explosion-proof channel, the first sub explosion-proof channel and the second sub explosion-proof channel are arranged at intervals in a first direction (as indicated by an arrow in fig. 1), and the frame is used for surrounding the part forming the first sub explosion-proof channel and has a first notch, and the frame is used for surrounding the part forming the second sub explosion-proof channel and has a second notch.
Step S32, cutting the cell module along the first notch or the second notch near the damaged side.
Specifically, after the distances from the first notch and the second notch to the damaged side are determined, respectively, the cell module is cut along the first notch or the second notch near the damaged side. For example, if the first notch is 50 mm from the damaged side and the second notch is 100 mm from the damaged side, the cell module is cut along the first notch near the damaged side.
In some embodiments, as shown in fig. 10, fig. 10 provides a schematic flow chart of another method for cascade utilization of the cell module, where the method for cascade utilization is different from the method for cascade utilization provided in fig. 9, and step S3 in fig. 10 further includes cutting the cell module along the notch:
in step S33, a heat insulating material is added to the explosion-proof channel.
Specifically, when the cell module is cut along the first notch or the second notch near the damaged side, high temperature is generated in the cutting process, and the damage of the cell on the normal side can be possibly caused by the high temperature, so that the distance between the first sub explosion-proof channel and the second sub explosion-proof channel to the damaged side is determined in the first direction, and the heat insulation material is added into the explosion-proof channel between the cutting of the cell module along the first notch or the second notch near the damaged side. The heat insulation material is added in the explosion-proof channel, so that the damage to the battery core at the normal side caused by high temperature generated by cutting is avoided, the material and the filling amount of the heat insulation material are not limited, the heat insulation material can be determined according to actual requirements, and the heat insulation material meets the requirements.
In some embodiments, as shown in fig. 11, fig. 11 provides a schematic flow chart of another cascade utilization method of the battery cell module, which is different from the cascade utilization method provided in fig. 10, in that step S33 in fig. 11 includes adding a heat insulating material in the explosion-proof channel:
in step S331, a heat insulating material is added to the first sub explosion-proof channel or the second sub explosion-proof channel away from the damaged side.
Specifically, to avoid wasting of the insulation material while avoiding the insulation material from affecting the cutting efficiency, the insulation material is added in the first sub explosion-proof channel or the second sub explosion-proof channel away from the damaged side. The distance from the first notch to the damaged side is 50 mm, the distance from the second notch to the damaged side is 100 mm, one side close to the first sub-explosion-proof channel is the damaged side, one side close to the second sub-explosion-proof channel is the normal side, the heat insulation material is added into the second sub-explosion-proof channel, the battery cell module cuts along the first notch close to the damaged side, the heat insulation material cannot be cut in the cutting process, so that the cutting efficiency is guaranteed, meanwhile, the heat insulation material is added into the second sub-explosion-proof channel, and the influence of high temperature on a battery cell at the normal side when the first notch is cut is effectively avoided.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention.
Claims (9)
1. A detachable cell module, comprising:
a frame having an explosion-proof passage, the frame having a notch for surrounding a portion forming the explosion-proof passage;
the battery cores are positioned in the frame and are positioned on two sides of the explosion-proof channel in a first direction, the first direction is perpendicular to the length direction of the explosion-proof channel, each battery core is provided with an explosion-proof valve, and each battery core is communicated with the explosion-proof channel through the explosion-proof valve;
wherein in a second direction, the frame is separable along the slot, the first direction being perpendicular to the second direction;
the explosion-proof channel is provided with a first sub explosion-proof channel and a second sub explosion-proof channel, and the first sub explosion-proof channel and the second sub explosion-proof channel are arranged at intervals in a first direction;
the battery cell on one side of the explosion-proof channel is communicated with the first sub explosion-proof channel through the explosion-proof valve, the battery cell on the other side of the explosion-proof channel is communicated with the second sub explosion-proof channel through the explosion-proof valve, and the notch is positioned between the first sub explosion-proof channel and the second sub explosion-proof channel.
2. The battery cell module of claim 1, wherein the frame comprises a first spacer positioned between the first sub-explosion-proof channel and the second sub-explosion-proof channel, the notch being positioned on the first spacer.
3. The cell module of claim 1, wherein the frame comprises: the second baffle and the third baffle, second baffle and third baffle are located first sub explosion-proof passageway with between the sub explosion-proof passageway of second, and set up at first direction interval, the notch is located between second baffle and the third baffle.
4. The battery cell module of claim 1, wherein the number of slots is a plurality and at least some of the slots are spaced apart in a first direction.
5. The battery cell module of claim 1, wherein the frame further comprises an upper cover plate and a lower cover plate, wherein the upper cover plate and the lower cover plate are each provided with a plurality of heat exchange channels, and wherein the plurality of heat exchange channels are distributed on two sides of the explosion-proof channel.
6. A cascade utilization method of a battery cell module, wherein the cascade utilization method is used for controlling the battery cell module according to any one of claims 1 to 5, the battery cell module further comprising a sensor, the cascade utilization method comprising:
acquiring state information of the battery cell module by the sensor;
determining a damaged side in the battery cell module based on the state information, wherein the damaged side is one side where any damaged battery cell in two sides of the explosion-proof channel is located;
the cell module is cut along the notch to separate the damaged side from the remainder of the cell module.
7. The cascade utilization method of claim 6, wherein the explosion vent has a first sub-explosion vent and a second sub-explosion vent, the first sub-explosion vent and the second sub-explosion vent being spaced apart in a first direction, and the frame has a first notch for surrounding a portion forming the first sub-explosion vent, and the frame has a second notch for surrounding a portion forming the second sub-explosion vent, the cutting the cell module along the notch comprising:
determining distances from the first sub explosion-proof channel and the second sub explosion-proof channel to the damaged side respectively in the first direction;
the cell module is cut along the first notch or the second notch adjacent to the damaged side.
8. The method of claim 7, wherein the determining the distance of the first and second sub-explosion-proof channels to the damaged side in the first direction and between cutting the cell module along the first or second notches proximate the damaged side, respectively, the cutting the cell module along the notches further comprises:
a thermal insulation material is added to the explosion proof channel.
9. The method of claim 8, wherein the adding insulation material in the explosion-proof channel further comprises:
an insulating material is added in the first sub-explosion-proof channel or the second sub-explosion-proof channel remote from the damaged side.
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| CN202211000958.1A CN115347297B (en) | 2022-08-19 | 2022-08-19 | Detachable battery core module and echelon utilization method |
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| CN202211000958.1A CN115347297B (en) | 2022-08-19 | 2022-08-19 | Detachable battery core module and echelon utilization method |
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| CN115347297B true CN115347297B (en) | 2023-12-22 |
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