CN117080673B - Battery module and power utilization device - Google Patents
Battery module and power utilization device Download PDFInfo
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- CN117080673B CN117080673B CN202311340089.1A CN202311340089A CN117080673B CN 117080673 B CN117080673 B CN 117080673B CN 202311340089 A CN202311340089 A CN 202311340089A CN 117080673 B CN117080673 B CN 117080673B
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- exhaust hood
- collecting
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- 238000003466 welding Methods 0.000 claims description 9
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- 239000004952 Polyamide Substances 0.000 claims description 7
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Classifications
-
- 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
- H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
- H01M50/358—External gas exhaust passages located on the battery cover or case
-
- 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
-
- 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
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
-
- 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
- H01M50/251—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for stationary devices, e.g. power plant buffering or backup power supplies
-
- 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
- H01M50/392—Arrangements for facilitating escape of gases with means for neutralising or absorbing electrolyte; with means for preventing leakage of electrolyte through vent holes
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The invention discloses a battery module and an electricity utilization device, wherein the battery module comprises a plurality of single batteries and a gas collection assembly, wherein the single batteries are arranged along a preset direction, and an explosion-proof valve is arranged at the top of each single battery; the gas collection assembly comprises an exhaust hood and a collection piece, the exhaust hood is located at the tops of the single batteries and comprises an air inlet and an air outlet, the air inlet covers the explosion-proof valves, so that discharged air flows enter the exhaust hood through the air inlet when the explosion-proof valves are depressurized, and an opening of the collection piece is communicated with the air outlet to collect the air flows passing through the air outlet.
Description
Technical Field
The application relates to the technical field of electric devices, in particular to a battery module and an electric device.
Background
Along with the rapid development of new energy, the requirement on the safety performance of the battery module is higher and higher, the battery module comprises a plurality of single batteries, the top of each single battery is provided with an explosion-proof valve, when the single battery is out of control thermally, the explosion-proof valve corresponding to the single battery is opened to release pressure so as to directly discharge the air flow (including the electrolyte and the harmful gas generated by the electrolytic reaction) in the single battery to relieve the thermal runaway degree of the single battery, but the directly discharged air flow can pollute the environment and pollute other single batteries in the battery module, the safety of the battery module is reduced, and the method is also unfavorable for carrying out retrospective analysis on the abnormal reasons of the battery module.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the battery module and the power utilization device, which can reduce the pollution to the environment, improve the safety of the battery module and be beneficial to tracing and analyzing the reasons of the abnormality of the battery module.
In order to solve the above technical problem, in a first aspect, the present invention provides a battery module, including:
the plurality of single batteries are arranged along a preset direction, and an explosion-proof valve is arranged at the top of each single battery;
the gas collection assembly comprises an exhaust hood and a collection piece, wherein the exhaust hood is positioned at the top of a plurality of single batteries and comprises an air inlet and an air outlet, the air inlet covers a plurality of explosion-proof valves, so that discharged air flow enters the exhaust hood through the air inlet when the explosion-proof valves are depressurized, and an opening of the collection piece is connected with the air outlet so as to collect the air flow passing through the air outlet.
Therefore, because the exhaust hood is positioned at the top of the plurality of single batteries, and the air inlet of the exhaust hood covers the plurality of explosion-proof valves, when the corresponding explosion-proof valves are depressurized by the single batteries due to thermal runaway, generated air flow can be sprayed towards the exhaust hood, and because the air inlet covers the explosion-proof valves, high-pressure air flow during depressurization of the explosion-proof valves can be sprayed towards the air inlet and can enter the exhaust hood through the high-pressure air flow of the air inlet, and the inner space of the exhaust hood can stabilize the high-pressure air flow so as to reduce the blasting force of the air flow, thereby reducing the risk of potential safety hazards. In addition, because the gas outlet of the exhaust hood is connected with the opening of the collecting piece, the gas flow after being stabilized by the inner space of the exhaust hood can be collected in the collecting piece, therefore, through the arrangement of the exhaust hood and the collecting piece, the gas flow sprayed by the explosion-proof valve through pressure relief can be recovered and collected when the single battery is in thermal runaway, the gas flow is prevented from being directly discharged to the external environment, and the gas flow sprayed by the thermal runaway of the single battery contains electrolyte and a large amount of harmful substances, so that the pollution degree of the single battery to the environment and the damage degree of the single battery to the body of staff can be reduced through the recovery and collection of the collecting piece, and the pollution of the electrolyte in the sprayed gas flow to other single batteries can be prevented, thereby improving the safety of the battery module.
In a possible implementation manner of the first aspect, the collecting member is configured to bend toward the unit cell at an end away from the air outlet to form a hook portion;
the exhaust hood is provided with a storage position for storing the collecting piece wound and rolled.
Therefore, one end, far away from the air outlet, of the collecting piece is bent towards the single battery to form a hook part, and a storage position is formed on the exhaust hood, so that on one hand, the collecting piece can be wound and rolled when the battery module is not out of control, the collecting piece can be protected, and the collecting piece can be reduced to occupy more installation space of the battery module.
In a possible implementation manner of the first aspect, the exhaust hood further includes a support plate stacked on top of the plurality of unit cells and a fence member disposed on the support plate, where a space formed by enclosing the support plate and the fence member is the storage position.
Through setting up the backup pad, can keep apart the collecting member of coiling rolling and battery cell to avoid the scratch coiling collecting member when welding the battery cell, in addition, enclose the fender piece through setting up, can enclose the fender around the collecting member of coiling rolling, thereby reach the purpose of protection collecting member, avoid the collecting member to be by the emergence of conditions such as outside environment fish tail, damage.
In a possible implementation manner of the first aspect, the exhaust hood further includes a protection plate connected to a side edge of the support plate away from the explosion-proof valve, where the side edge of the protection plate away from the explosion-proof valve extends beyond or is flush with an end of the collecting member when the collecting member protrudes; or alternatively, the first and second heat exchangers may be,
the battery module further comprises a plurality of tabs, each two adjacent battery cell poles are fixedly connected through one tab, the protection plates are stacked on the tabs, and the edges of one side, away from the explosion-proof valve, of the protection plates are flush with the edges of the tabs.
From this, through making the guard plate keep away from one side edge of explosion-proof valve surpass the tip of collecting the piece or with the tip parallel and level of collecting the piece when collecting the piece and stretch out, or the guard plate keep away from one side edge of explosion-proof valve and the edge parallel and level of tab, can protect the collecting piece that stretches out to cause the fish tail to collecting the piece when avoiding welding the tab on the utmost point post.
In a possible implementation manner of the first aspect, the opening of the collecting member is sealingly connected to the air outlet of the exhaust hood by a clip or ultrasonic welding.
Therefore, the opening of the collecting piece is in sealing connection with the air outlet of the exhaust hood through the clamp or ultrasonic welding, the sealing connection structure of the collecting piece and the exhaust hood can be simplified, and meanwhile, the stability of the sealing connection of the collecting piece and the exhaust hood is improved.
In a possible implementation manner of the first aspect, the collecting member is a polyamide resin collecting member or a polyamide fabric collecting member.
Since the mechanical strength and hardness of the polyamide resin and the polyamide fabric are high and the rigidity is high, the polyamide resin collecting piece or the polyamide fabric collecting piece as the collecting piece can improve the strength and toughness of the collecting piece, thereby improving the service life of the collecting piece.
In a possible implementation manner of the first aspect, the exhaust hood further includes a gas-liquid separation member disposed in the exhaust hood, and the gas-liquid separation member is configured to separate a liquid in the airflow, so that the separated airflow enters the collecting member through the air outlet.
Through setting up the gas-liquid separation spare, can separate out the liquid in the air current to in making the air current after the separation get into the collection spare through the gas outlet, can't separate out the liquid in the correlation technique, improved the recovery efficiency of liquid like electrolyte, reduced the waste of the energy, reduced the potential safety hazard simultaneously.
In a possible implementation manner of the first aspect, the gas-liquid separation element is an asbestos element;
the exhaust hood further comprises a guide plate arranged in the exhaust hood, the guide plate divides the internal space of the exhaust hood into a first space close to the explosion-proof valve and a second space far away from the explosion-proof valve, the air inlet is communicated with the first space, the air outlet is communicated with the second space, a plurality of mounting through holes are formed in the guide plate, and the asbestos pieces are respectively mounted in the plurality of mounting through holes; or alternatively, the first and second heat exchangers may be,
The exhaust hood further comprises a plurality of guide blocks arranged in the exhaust hood, the guide blocks are arranged on the top wall of the exhaust hood in an array mode to form a plurality of air flow channels communicated with the air inlets, the air outlets are respectively communicated with the air flow channels, and the asbestos pieces are respectively arranged in the air flow channels.
Because asbestos has higher intensity, internal chemistry and thermal erosion, therefore, when the gas-liquid separation piece is the asbestos piece, can improve the life of gas-liquid separation piece, in addition, because the asbestos piece comprises the fibre bundle, consequently, adsorption efficiency is better, consequently, the asbestos piece can improve the effect of gas-liquid separation in the air current as the gas-liquid separation piece.
In addition, when the exhaust hood further comprises a guide plate, when the explosion-proof valve is used for pressure relief, pressure-relieved air flow firstly enters the first space through the air inlet, then enters the second space through a plurality of mounting through holes in the guide plate, and in the process of entering the second space, asbestos pieces in the mounting through holes can separate liquid in the air flow, so that the separated air flow enters the second space after gas-liquid separation, and then is collected in the collecting piece through the air outlet by the second space. Therefore, the asbestos piece is arranged on the guide plate through the guide plate, so that on one hand, the flow of air flow can be guided, on the other hand, liquid in the air flow can be rapidly separated, the air flow containing the liquid is reduced as much as possible and enters the collecting piece, on the other hand, the guide plate can also buffer the impact force of the air flow emitted by the explosion-proof valve, and therefore the purpose of protecting the collecting piece and the exhaust hood is achieved.
In addition, when the exhaust hood comprises a plurality of guide blocks arranged in an array, when the explosion-proof valve is used for pressure relief, the pressure-relieved air flow can flow through an air flow channel formed by the plurality of guide blocks, and the asbestos piece is arranged in the air flow channel, so that when the air flow passes through the air flow channel, liquid in the air flow can be separated out by the asbestos piece, and the separated air flow enters the collecting piece through the air outlet. Therefore, a plurality of air flow channels communicated with the air inlet are formed through the guide blocks, and the asbestos pieces are arranged in the air flow channels, so that the asbestos pieces in the air flow channels can separate liquid in the air flow channel, the time of separating the liquid in the air flow by the asbestos pieces is prolonged, and the separation effect of the liquid in the air flow by the asbestos pieces is improved.
In a possible implementation manner of the first aspect, the two air outlets are symmetrically arranged on two outer side walls of the exhaust hood respectively;
the collecting piece comprises two collecting pieces, and openings of the two collecting pieces are respectively connected with the two air outlets.
Through setting up two gas outlets of symmetry, and two gas outlets are connected with two collection pieces respectively, can be in the cover inner space of exhaust hood's air current can get into two collection pieces through two gas outlets respectively symmetry to the exhaust hood has been guaranteed the homogeneity of exhaust hood atress in explosion-proof valve pressure release in-process.
In a possible implementation manner of the first aspect, the battery module further includes a wire harness collecting member, the wire harness collecting member is disposed at the top of the plurality of single batteries and covers the plurality of explosion-proof valves, a wire harness groove and a plurality of avoidance through holes are formed in the wire harness collecting member, the plurality of avoidance through holes and the plurality of explosion-proof valves are in one-to-one correspondence, and the exhaust hood is disposed at the top of the plurality of single batteries through the wire harness collecting member.
From this, through setting up the pencil and gathering the piece, and be provided with the pencil groove that is used for the holding pencil on making the pencil gather the piece, can integrate a plurality of parts and form a part, the structure is frivolous, the integrated level is high, is favorable to improving battery module space's utilization ratio and packaging efficiency, in addition, owing to reduced the quantity of gathering parts such as voltage, temperature to the battery cell and to the occupation in battery module space, improved battery module's energy density. In addition, because FPC, PCB and FFC in the pencil collection part all are connected with battery management system electricity of battery module to improve battery management system's degree of automation.
In addition, the plurality of avoidance through holes are arranged to avoid the explosion-proof valves respectively, so that the gas-liquid mixture sprayed by the explosion-proof valve can be smoothly sent out when any one of the explosion-proof valves is depressurized.
In a possible implementation manner of the first aspect, the wire harness collecting element includes a plurality of first sub-collecting elements detachably spliced in sequence along the preset direction.
Because the pencil collection piece is by a plurality of first sub collection pieces along predetermineeing the direction and can dismantle the concatenation in proper order and form, therefore, on the one hand, when damage appears in any first sub collection piece, need not to change whole pencil collection piece, only need with the first sub collection piece of damage dismantle from other first sub collection pieces change new can, the convenience of pencil collection piece maintenance has been improved, the cost of pencil collection piece maintenance has been reduced, on the other hand, when the pencil collection piece equipment, can follow predetermineeing the direction and splice a plurality of first sub collection pieces in proper order, compare in integrated into one piece's pencil collection piece, the equipment degree of difficulty of pencil collection piece has been simplified, thereby the condition that the pencil collection piece has appeared the perk at the in-process of equipment has been avoided.
In a possible implementation manner of the first aspect, in the preset direction, a clamping hole is provided at one end of the first sub-collecting member, a clamping protrusion is provided at the other end of the first sub-collecting member, and the clamping hole on the first sub-collecting member is matched with the adjacent clamping protrusion on the first sub-collecting member.
Because the assembly process of the clamping bulge and the clamping hole is simple, in the detachable assembly of the plurality of first sub-collecting pieces, the assembly process of the plurality of first sub-collecting pieces is simplified, and the assembly efficiency of the plurality of first sub-collecting pieces is improved.
In a possible implementation manner of the first aspect, the harness collecting member is further provided with a plurality of separation convex rings protruding toward the exhaust hood, the separation convex rings and the avoidance through holes are in one-to-one correspondence, and the separation convex rings encircle the corresponding peripheral edges of the avoidance through holes.
Because the circumference of every explosion-proof valve is provided with a plurality of separation bulge loops around, consequently, separate the bulge loop and can form a complete passageway to make the air current of every explosion-proof valve pressure release send out through its independent passageway that corresponds when the explosion-proof valve pressure release, thereby avoid causing pollution and corruption to other battery cells, further improved battery module's security.
In a possible implementation manner of the first aspect, the exhaust hood protrudes towards one side of the single battery and is provided with a drainage convex portion, the drainage convex portion is provided with an inner space communicated with the air inlet, the drainage convex portion is arranged on the separation convex rings in a sealing manner, and the wire harness groove is located between the exhaust hood and the wire harness collecting piece.
Because the drainage convex part is arranged on one side of the exhaust cover towards the single battery in a protruding way, and the drainage convex part is sleeved on the plurality of separation convex rings, a certain space is formed between one side of the exhaust cover towards the single battery and the wire harness collecting piece, and a wire harness groove which can be used for placing a signal wire harness and other components is formed in the space, the utilization rate of the space between the exhaust cover and the single battery is improved.
In a possible implementation manner of the first aspect, two separation convex portions are protruding towards one side of the exhaust hood from the wire harness collecting piece, the two separation convex portions extend along the preset direction, the two separation convex portions are located on two opposite sides of the drainage convex portion respectively in the direction perpendicular to the preset direction, and each separation convex portion and the drainage convex portion are enclosed to form one wire harness groove.
From this, through set up the separation convex part that extends along preset direction in the opposite both sides of drainage convex part respectively in the perpendicular to preset direction, can form two pencil grooves that extend along preset direction in the opposite both sides of drainage convex part, on the one hand, can increase the accommodation space in pencil groove, on the other hand, because the pencil groove extends along preset direction, and preset direction is battery module's length direction promptly, consequently, can make the pencil be sharp shape accommodation along preset direction, avoid leading to pencil insulating layer ageing or fracture because of the pencil buckles for a long time, the life of pencil has been improved, and then the stability that battery module used has been improved.
In a possible implementation manner of the first aspect, the harness collecting piece is provided with a first fastening hole, the exhaust hood is provided with a second fastening hole, and the exhaust hood is fixed on the harness collecting piece by sequentially penetrating through the first fastening hole and the second fastening hole through a fastener.
Because the fastener passes first fastening hole and second fastening hole in proper order and makes the exhaust hood be fixed in on the pencil collection piece, consequently, compare in the joint fixedly, improved the fastness that the exhaust hood was fixed in on the pencil collection piece.
In a second aspect, the present invention further provides an electrical device, where the electrical device includes the battery module according to the first aspect.
Since the electricity consumption device includes the battery module of the first aspect, the air flow generated when thermal runaway occurs in any one of the unit cells of the battery module can be recovered and collected, thereby reducing the degree of environmental pollution of the electricity consumption device.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view showing a structure of a battery module according to an embodiment of the present invention in an extended state of a collecting member;
FIG. 2 is a schematic view of an exhaust hood according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a battery module without an exhaust hood according to an embodiment of the present invention;
FIG. 4 is an enlarged partial schematic view of FIG. 1 at A;
fig. 5 is a schematic view of a structure of a collecting member wound in a battery module according to an embodiment of the present invention;
FIG. 6 is an enlarged partial schematic view at B in FIG. 5;
FIG. 7 is an enlarged partial schematic view of FIG. 5C;
FIG. 8 is one of the cross-sectional views at D-D in FIG. 2;
FIG. 9 is a second cross-sectional view taken at D-D in FIG. 2;
fig. 10 is a schematic structural diagram of an array arrangement of guide blocks according to an embodiment of the present invention;
FIG. 11 is a schematic view of a first sub-collection assembly according to an embodiment of the present invention;
FIG. 12 is a schematic view of an exhaust hood according to another embodiment of the present invention;
FIG. 13 is a cross-sectional view taken at E-E of FIG. 1;
fig. 14 is a schematic structural diagram of an electric device according to an embodiment of the present invention.
Reference numerals illustrate:
100-battery module; 110-single battery; 111-explosion-proof valve; 112-bara; 120-a gas collection assembly; 121-an exhaust hood; 1211-an air inlet; 1212-gas outlet; 1213-guard plate; 1214-storage location; 1215-a support plate; 1216-a fence; 1217-a first space; 1218-a second space; 12191-a first outer sidewall; 12192-a second outer sidewall; 122-collecting piece; 1221-a hook; 123-gas-liquid separation piece; 1231-asbestos pieces; 124-guide plate; 1241-mounting through holes; 125-guide blocks; 1251-gas flow passage; 130-a wire harness acquisition member; 131-wire bundle slots; 132-avoiding the through hole; 133-separating collars; 134-dividing projections; 135-a first fastening hole; 136-a second fastening hole; 130 a-a first sub-acquisition; 130a 1-a clamping hole; 130a 2-snap-fit protrusions; 140-drainage convex part;
200-an electrical device.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present invention and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present invention will be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.
As described in the background art of the present application, in the related art, with rapid development of new energy, the requirement on the safety performance of the battery module is higher and higher, the battery module includes a plurality of unit batteries, the top of each unit battery is provided with an explosion-proof valve, when a thermal runaway occurs in the unit battery, the explosion-proof valve corresponding to the unit battery will open the valve and release the pressure, so as to directly exhaust the air flow (including the electrolyte and the harmful gas generated by the electrolytic reaction) in the unit battery, to alleviate the thermal runaway degree of the unit battery, but the directly exhausted air flow will pollute the environment and pollute other unit batteries in the battery module, reducing the safety of the battery module, and also being unfavorable for tracing and analyzing the cause of the abnormality of the battery module.
In order to solve the technical problems mentioned in the background art, the invention provides a battery module and an electric device, wherein a gas collecting assembly is arranged in the battery module, the gas collecting assembly comprises an exhaust hood and a collecting piece, an air inlet of the exhaust hood is covered on an explosion-proof valve, so that air flow discharged through decompression of the explosion-proof valve enters the exhaust hood through the air inlet, and an air outlet of the exhaust hood is connected with the collecting piece, so that the air flow in the exhaust hood can be collected in the collecting piece through the air outlet, and therefore, the air flow discharged through decompression of the explosion-proof valve can be collected, on one hand, the risk of pollution of electrolyte in the air flow to other single batteries is reduced, on the other hand, the risk of pollution of the air flow to the environment is reduced, and on the other hand, the air flow can be detected through the collecting piece, so that the reasons of abnormality of the battery module can be analyzed, and the safety of the battery module is improved.
The present application is described in detail below by way of specific examples:
referring to fig. 1 to 3, an embodiment of the present application provides a battery module 100, where the battery module 100 includes a plurality of unit cells 110 and a gas collection assembly 120, wherein the plurality of unit cells 110 are arranged along a preset direction, and an explosion-proof valve 111 is disposed at the top of each unit cell 110; the gas collection assembly 120 includes an exhaust hood 121 and a collection member 122, the exhaust hood 121 is located at the top of the plurality of unit cells 110, the exhaust hood 121 includes an air inlet 1211 and an air outlet 1212, the air inlet 1211 covers the plurality of explosion-proof valves 111, so that the air flow discharged when the explosion-proof valves 111 are depressurized enters the exhaust hood 121 through the air inlet 1211, and an opening of the collection member 122 communicates with the air outlet 1212 to collect the air flow passing through the air outlet 1212.
Wherein the plurality refers to two or more numbers, the preset direction refers to the direction indicated by the X arrow in fig. 1, and the preset directions referred to hereinafter refer to the directions indicated by the X arrow.
The air inlet 1211 covers the plurality of explosion-proof valves 111, and it should be understood that when the explosion-proof valves 111 are depressurized, the discharged air flow can enter the exhaust hood 121 almost entirely through the air inlet 1211, and the structures of the exhaust hood 121 and the collecting member 122 are not limited, for example, the exhaust hood 121 has a rectangular parallelepiped structure, the length direction of the exhaust hood 121 coincides with the preset direction, and the collecting member 122 may be an air bag, a collecting bag, or the like, and in this embodiment, the air bag is mainly taken as an example for the detailed description.
Thus, in the present embodiment, since the exhaust hood 121 is located at the top of the plurality of unit cells 110, and the air inlet 1211 of the exhaust hood 121 covers the plurality of explosion-proof valves 111, when the unit cells 110 release the corresponding explosion-proof valves 111 due to thermal runaway, the generated air flow can be ejected toward the exhaust hood 121, and since the air inlet 1211 covers the explosion-proof valves 111, the high-pressure air flow at the time of releasing the explosion-proof valves 111 can be ejected toward the air inlet 1211, the high-pressure air flow passing through the air inlet 1211 will enter the exhaust hood 121, and the inner space of the exhaust hood 121 can stabilize the high-pressure air flow, so as to reduce the bursting force of the air flow, thereby reducing the risk of potential safety hazard. In addition, since the air outlet 1212 of the exhaust hood 121 is connected with the opening of the collecting member 122, the air flow stabilized by the internal space of the exhaust hood 121 can be collected in the collecting member 122, and therefore, by arranging the exhaust hood 121 and the collecting member 122, the air flow discharged and sprayed by the explosion-proof valve 111 can be recovered and collected when the thermal runaway occurs to the single battery 110, the air flow is prevented from being directly discharged to the external environment, and the air flow discharged and sprayed by the thermal runaway of the single battery contains electrolyte and a large amount of harmful substances, so that the environmental pollution degree and the damage degree to the body of staff caused by the thermal runaway of the single battery 110 can be reduced by the recovery and collection of the air flow by the collecting member 122, and the pollution of the electrolyte in the sprayed air flow to other single batteries 110 is prevented, thereby improving the safety of the battery module 100.
In some possible embodiments, referring to fig. 4 and 5, the end of the collecting piece 122 remote from the air outlet 1212 is bent toward the battery cell 110 to form a hook 1221; the exhaust hood 121 is provided with a storage position 1214 for storing the wound collection member 122.
When the single battery 110 is in thermal runaway and the explosion-proof valve 111 is depressurized, the air flow accumulated in the exhaust hood 121 is conveyed to the collecting piece 122 through the air outlet 1212, and as the conveyed air flow increases, the collecting piece 122 wound around is stretched in a direction away from the exhaust hood 121, that is, the collecting piece 122 is in a stretched state, and when the collecting piece 122 is in the stretched state, one end of the collecting piece 122 away from the air outlet 1212 is bent towards the single battery 110 to form a hook 1221; in contrast, when the thermal runaway of the unit battery 110 does not occur, the collecting member 122 is in a wound state and is stored in the storage position 1214, and when the collecting member 122 is in a wound state, the hook portion 1221 of the collecting member 122 is wound and is positioned at the center position of the collecting member 122 in the wound state.
Therefore, in this embodiment, the end of the collecting member 122 away from the air outlet 1212 is bent towards the single battery 110 to form the hook 1221, and the accommodating position 1214 is provided on the exhaust hood 121, so that, on one hand, the collecting member 122 can be wound and rolled when the battery module 100 is not subject to thermal runaway, not only can the collecting member 122 be protected, but also the collecting member 122 can be reduced to occupy more installation space of the battery module 100, and on the other hand, since the hook 1221 is formed by bending towards the single battery, when the collecting member 122 is wound and rolled, the exhaust hood 121 can provide resistance for preventing the collecting member 122 in the wound and rolled state from naturally stretching, thereby ensuring the stability of accommodating the collecting member 122 in the wound and rolled state.
Note that the shape of the storage space 1214 corresponds to the shape of the wound collection material 122, and the storage space 1214 may be a space dug in the exhaust hood 121 or a space surrounded by additional members, which will be described below.
In some possible embodiments, referring to fig. 4 to 6, the exhaust hood 121 further includes a support plate 1215 stacked on top of the plurality of unit cells 110 and a enclosure 1216 disposed on the support plate 1215, where a space formed by the support plate 1215 and the enclosure 1216 is a storage location 1214.
Wherein, the enclosure 1216 can be plate-shaped structure or columnar structure.
In this embodiment, by providing the support plate 1215, the wound collecting member 122 can be isolated from the unit cell 110, so as to avoid scratching the wound collecting member 122 during welding the unit cell 110, and in addition, by providing the enclosure member 1216, the periphery of the wound collecting member 122 can be enclosed, so that the purpose of protecting the collecting member 122 is achieved, and the collecting member 122 is prevented from being scratched and damaged by the external environment.
Illustratively, the enclosure 1216 includes a first enclosure plate, a second enclosure plate, and a third enclosure plate that are sequentially connected, where the first enclosure plate and the third enclosure plate are respectively connected at opposite ends of the second enclosure plate along a preset direction, the first enclosure plate and the third enclosure plate are opposite and parallel, the second enclosure plate extends along the preset direction, and a space formed by enclosing the side wall of the exhaust hood 121, the first enclosure plate, the second enclosure plate, and the third enclosure plate is a storage position 1214, or the enclosure 1216 includes a first enclosure plate, a second enclosure plate, a third enclosure plate, and a fourth enclosure plate that are sequentially connected, where the first enclosure plate and the third enclosure plate are parallel and opposite, the second enclosure plate and the fourth enclosure plate are parallel and opposite, and the fourth enclosure plate is connected with the side wall of the exhaust hood 121.
In some possible embodiments, referring to fig. 1, 5 and 7, the exhaust hood 121 further includes a shielding plate 1213 connected to a side edge of the supporting plate 1215 remote from the explosion-proof valve 111, the side edge of the shielding plate 1213 remote from the explosion-proof valve 111 is beyond an end of the collecting member 122 or is flush with an end of the collecting member 122 when the collecting member 122 protrudes, or the battery module 100 further includes a plurality of tabs 112, the posts of each adjacent two unit cells 110 are fixedly connected by one tab 112, the shielding plate 1213 is laminated on the tab 112, and the side edge of the shielding plate 1213 remote from the explosion-proof valve 111 is flush with an edge of the tab 112.
Thus, by making one side edge of the shielding plate 1213 away from the explosion-proof valve 111 protrude beyond the end of the collecting piece 122 or flush with the end of the collecting piece 122 when the collecting piece 122 protrudes, or making one side edge of the shielding plate 1213 away from the explosion-proof valve 111 flush with the edge of the tab 112, the protruding collecting piece 122 can be protected from scratch of the collecting piece 122 when the tab 112 is welded to the post.
In addition, the protection plate 1213 is optionally integrally formed with the support plate 1215 and the enclosure 1216, so as to reduce assembly parts of the exhaust hood 121, improve assembly efficiency of the exhaust hood 121, and make the plate surface direction of the protection plate 1213 the same as the plate surface direction of the support plate 1215, so that the structure of the exhaust hood 121 is more compact.
In some possible embodiments, the opening of the collection member 122 is sealingly connected to the air outlet 1212 of the exhaust hood 121 by a clip or ultrasonic welding.
For example, when the collecting member 122 is sealingly connected to the exhaust hood 121 by using the clip, the edge of the air outlet 1212 of the exhaust hood 121 extends out of the connection collar, the opening of the collecting member 122 is sleeved on the connection collar, and then the clip is sleeved on the collecting member 122 to tightly attach the inner wall of the opening of the collecting member 122 to the outer peripheral wall of the connection collar, and when the collecting member 122 is sealingly connected to the exhaust hood 121 by using ultrasonic welding, the edge of the opening of the collecting member 122 is directly welded to the edge of the air outlet 1212 of the exhaust hood 121 to form a seal.
Therefore, the opening of the collecting member 122 is in sealing connection with the air outlet 1212 of the exhaust hood 121 by the clip or ultrasonic welding, so that the sealing connection structure of the collecting member 122 and the exhaust hood 121 can be simplified, and the sealing connection stability of the collecting member 122 and the exhaust hood 121 is improved.
In some possible embodiments, the collection member 122 is a polyamide resin collection member or a polyamide fabric collection member.
Among them, polyamide resin is a thermoplastic resin, and is also a high-strength fiber fabric.
Since the mechanical strength and hardness of the polyamide resin and the polyamide fabric are high and the rigidity is high, the polyamide resin collecting piece or the polyamide fabric collecting piece as the collecting piece 122 can improve the strength and toughness of the collecting piece 122, thereby improving the service life of the collecting piece 122.
In some possible embodiments, referring to fig. 8, a gas-liquid separation member 123 is disposed in the exhaust hood 121, and the gas-liquid separation member 123 is configured to separate the liquid in the gas flow, so that the separated gas enters the collecting member 122 through the gas outlet 1212.
Therefore, in this embodiment, by providing the gas-liquid separation member 123, the liquid in the air flow can be separated, and the separated air flow enters the collecting member 122 through the air outlet 1212, so that the recovery efficiency of the liquid such as the electrolyte is improved, the waste of energy is reduced, and the potential safety hazard is reduced, compared with the case that the liquid cannot be separated in the related art.
The gas-liquid separator 123 may be a member having an adsorption capacity such as a sponge material or an asbestos material 1231, and the gas-liquid separator 123 will be mainly described in detail below as an example of the asbestos material 1231.
In some possible embodiments, referring to fig. 8, 9 and 10, the gas-liquid separation member 123 is an asbestos member 1231, the exhaust hood 121 further includes a guide plate 124 disposed in the exhaust hood 121, the guide plate 124 divides the internal space of the exhaust hood 121 into a first space 1217 close to the explosion-proof valve 111 and a second space 1218 far from the explosion-proof valve 111, the gas inlet 1211 is communicated with the first space 1217, the gas outlet 1212 is communicated with the second space 1218, a plurality of mounting through holes 1241 are disposed on the guide plate 124, and the asbestos member 1231 is respectively mounted in the plurality of mounting through holes 1241; or, the exhaust hood 121 further includes a plurality of guide blocks 125 disposed in the exhaust hood 121, and the plurality of guide blocks 125 are disposed on the top wall of the exhaust hood 121 in an array to form a plurality of air flow channels 1251 communicating with the air inlets 1211, the air outlets 1212 are respectively communicated with the air flow channels 1251, and the asbestos members 1231 are respectively installed in the air flow channels 1251.
Since asbestos has high strength, internal chemistry and thermal erosion, when the gas-liquid separator 123 is the asbestos member 1231, the service life of the gas-liquid separator 123 can be improved, and in addition, since the asbestos member 1231 is composed of fiber bundles, the adsorption effect is good, and therefore, the asbestos member 1231 can improve the gas-liquid separation effect in the gas stream as the gas-liquid separator 123.
In addition, when the exhaust hood 121 further includes the guide plate 124, during pressure relief of the explosion-proof valve 111, the pressure-relieved air flow first enters the first space 1217 through the air inlet 1211, then enters the second space 1218 through the plurality of mounting through holes 1241 on the guide plate 124, and during entering the second space 1218, the asbestos pieces 1231 in the mounting through holes 1241 can separate the liquid in the air flow, so that the separated air flow enters the second space 1218, and then is collected in the collecting piece 122 through the air outlet 1212 by the second space 1218. Therefore, by arranging the guide plate 124 to mount the asbestos member 1231 on the guide plate 124, on one hand, the flow of the air flow can be guided, on the other hand, the liquid in the air flow can be quickly separated, the air flow containing the liquid can be reduced as much as possible into the collecting member 122, and on the other hand, the guide plate 124 can buffer the impact force of the air flow emitted by the explosion-proof valve 111, so that the purpose of protecting the collecting member 122 and the exhaust hood 121 is achieved.
In addition, when the exhaust hood 121 includes the plurality of guide blocks 125 arranged in an array, when the explosion-proof valve 111 is depressurized, the depressurized air flow can flow through the air flow channel 1251 formed by the plurality of guide blocks 125, and the asbestos member 1231 is disposed in the air flow channel 1251, so that when the air flow passes through the air flow channel 1251, the asbestos member 1231 can separate the liquid in the air flow and the separated air flow enters the collecting member 122 through the air outlet 1212. It can be seen that the plurality of guide blocks 125 form a plurality of air flow channels 1251 communicated with the air inlet 1211, and the asbestos member 1231 is installed in the air flow channels 1251, so that the asbestos member 1231 in the air flow channels 1251 can separate the liquid in the air flow during the air flow flowing in the air flow channels 1251, thereby prolonging the time for separating the liquid in the air flow by the asbestos member 1231, and further improving the separation effect of the liquid in the air flow by the asbestos member 1231.
In some possible embodiments, referring to fig. 8, the air outlets 1212 include two air outlets 1212, and the two air outlets 1212 are symmetrically disposed on the two outer sidewalls of the exhaust hood 121, respectively; the collecting member 122 includes two, and openings of the two collecting members 122 are connected to the two air outlets 1212, respectively.
For example, the exhaust hood 121 is a cuboid structure, and two air outlets 1212 are respectively disposed on two opposite outer sidewalls of the exhaust hood 121 along a direction perpendicular to the preset direction at the top of the plurality of unit cells 110, and the two air outlets 1212 are symmetrical, or the two air outlets 1212 are disposed on two opposite outer sidewalls of the exhaust hood 121 along the preset direction.
Therefore, in the present embodiment, by providing two symmetrical air outlets 1212, and the two air outlets 1212 are respectively connected with the openings of the two collecting members 122, the air flow in the exhaust hood 121 can enter the two collecting members 122 through the two symmetrical air outlets 1212, thereby ensuring the uniformity of the stress of the exhaust hood 121 in the pressure release process of the explosion-proof valve 111.
Of course, in other embodiments, the number of the air outlets 1212 may be even, such as four, six, etc., and the even number of the air outlets 1212 are symmetrically disposed on the two outer sidewalls of the exhaust hood 121.
In order to increase the collection volume of the collection member 122, optionally, at the top of the plurality of unit cells 110, along a direction perpendicular to the preset direction, the exhaust hood 121 includes a first outer sidewall 12191 and a second outer sidewall 12192 opposite to each other, two air outlets 1212 are respectively located on the first outer sidewall 12191 and the second outer sidewall 12192, and the length direction of the air outlets 1212 is parallel to the preset direction.
Thus, the length of the battery module 100 in the preset direction is greater than the width perpendicular to the preset direction (i.e., the direction indicated by the Y arrow in fig. 8), and thus, when the air outlet 1212 is located at the first and second outer side walls 12191 and 12192, the length of the collecting member 122 in the preset direction can be increased, thereby increasing the collection volume of the collecting member 122 without changing the height and width of the collecting member 122.
Because the battery module 100 is formed by assembling a plurality of unit batteries 110 in series and parallel to realize high voltage and large electric quantity of operation of electric equipment such as an electric vehicle and a ventilation system driven by the battery module 100, in the related art, a bus is generally adopted to complete series-parallel connection of the plurality of unit batteries 110, meanwhile, in order to collect voltage of the unit batteries 110, temperature of the unit batteries 110 and temperature of the bus, a temperature sensor and a voltage sampling wire harness need to be arranged on the surface of the bus, which occupies more space of the battery module 100, and is unfavorable for improving energy density of the battery module 100.
The wire harness collecting element 130 is CCS (Cells Contact System, integrated busbar), and FPC (Flexible Printed Circuit, flexible circuit board), PCB (Printed Circuit Board ), FFC (Flexible Flat Cable, flexible flat cable), structural member, copper bar and/or aluminum bar are integrated on the wire harness collecting element 130.
Therefore, the wire harness collecting piece 130 is arranged, the wire harness groove 131 for containing the wire harness is formed in the wire harness collecting piece 130, a plurality of parts can be integrated to form one part, the structure is light, thin and high in integration level, the utilization rate and the assembly efficiency of the space of the battery module 100 are improved, and in addition, the energy density of the battery module 100 is improved due to the reduction of the number of collecting parts such as the voltage and the temperature of the single battery 110 and the occupation of the space of the battery module 100. In addition, since the FPC, the PCB, and the FFC in the harness collecting part 130 are electrically connected with the battery management system of the battery module 100, the degree of automation of the battery management system is improved.
In addition, since the plurality of escape through holes 132 are provided so as to escape the explosion-proof valves 111, it is possible to ensure that the gas-liquid mixture injected from the explosion-proof valves 111 is smoothly discharged when any one of the explosion-proof valves 111 is depressurized.
In some possible embodiments, referring to fig. 11, the wire harness acquisition member 130 includes a plurality of first sub-acquisition members 130a detachably spliced in sequence along a predetermined direction.
Because the wire harness collecting piece 130 is formed by a plurality of first sub-collecting pieces 130a in a detachable and spliced mode in sequence along a preset direction, on one hand, when any one of the first sub-collecting pieces 130a is damaged, the whole wire harness collecting piece 130 is not required to be replaced, only the damaged first sub-collecting piece 130a is required to be detached from other first sub-collecting pieces 130a to be replaced, the maintenance convenience of the wire harness collecting piece 130 is improved, the maintenance cost of the wire harness collecting piece 130 is reduced, on the other hand, when the wire harness collecting piece 130 is assembled, the plurality of first sub-collecting pieces 130a can be spliced in sequence along the preset direction, compared with the wire harness collecting piece 130 which is integrally formed, the assembly difficulty of the wire harness collecting piece 130 is simplified, and therefore the situation that the wire harness collecting piece 130 is tilted in the assembly process is avoided.
As can be seen from the foregoing, the plurality of first sub-collecting members 130a are detachably connected in sequence along the preset direction, so that the plurality of first sub-collecting members 130a are detachably connected in a plurality of structures, and in one possible structure, referring to fig. 11, in the preset direction, one end of the first sub-collecting member 130a is provided with a clamping hole 130a1, and the other end is provided with a clamping protrusion 130a2, and the clamping hole 130a1 on the first sub-collecting member 130a is matched with the clamping protrusion 130a2 on the adjacent first sub-collecting member 130a.
Because the assembly process of the clamping protrusion 130a2 and the clamping hole 130a1 is simple, in the detachable assembly of the plurality of first sub-collecting members 130a, the assembly process of the plurality of first sub-collecting members 130a is simplified, the assembly efficiency of the plurality of first sub-collecting members 130a is improved, and in addition, because the structure of the clamping protrusion 130a2 and the clamping hole 130a1 is simple, the structure of the plurality of first sub-collecting members 130a and the detachable assembly connection structure thereof are simplified, thereby reducing the processing cost of the first sub-collecting members 130 a.
In other embodiments, the plurality of first sub-collecting members 130a are provided with connection through holes, and the connection through holes of the two adjacent first sub-collecting members 130a are sequentially penetrated through by the bayonet locks, so that the two adjacent first sub-collecting members 130a can be detachably connected.
In some possible embodiments, referring to fig. 11 and 12, the harness collecting member 130 is further provided with a plurality of separation convex rings 133 protruding toward the exhaust hood 121, where the plurality of separation convex rings 133 are in one-to-one correspondence with the plurality of avoidance holes 132, and the separation convex rings 133 encircle the peripheral edges of the corresponding avoidance holes 132.
Wherein, the one-to-one correspondence between the plurality of separation convex rings 133 and the plurality of avoidance through holes 132 means that the number of the plurality of separation convex rings 133 and the plurality of avoidance through holes 132 is equal and the positions of the plurality of separation convex rings 133 and the plurality of avoidance through holes 132 are one-to-one correspondence.
Because the circumference of each explosion-proof valve 111 is provided with a plurality of separation convex rings 133, the separation convex rings 133 can form a complete channel, so that the air flow decompressed by each explosion-proof valve 111 is sent out through the corresponding independent channel when the explosion-proof valve 111 is decompressed, thereby avoiding polluting and corroding other single batteries 110 and further improving the safety of the battery module.
In some possible embodiments, referring to fig. 12 and 13, the exhaust hood 121 is convexly provided with a drainage protrusion 140 toward one side of the unit cell 110, the drainage protrusion 140 has an inner space communicating with the air inlet 1211, the drainage protrusion 140 is sealed and sleeved on the plurality of separation collars 133, and the harness groove 131 is located between the exhaust hood 121 and the harness collecting member 130.
Since the drainage convex portion 140 protrudes toward one side of the unit cell 110 and is disposed on the side of the exhaust cover 121 toward the unit cell 110, and the drainage convex portion 140 is sleeved on the plurality of separation convex rings 133, a certain space is formed between one side of the exhaust cover 121 toward the unit cell 110 and the harness collecting member 130, and the space forms a harness groove 131 which can be used for placing a signal harness and other components, so that the utilization rate of the space between the exhaust cover 121 and the unit cell 110 is improved.
In some possible embodiments, referring to fig. 13, two separation protrusions 134 are protruding from a side of the harness collecting part 130 facing the exhaust hood 121, the two separation protrusions 134 extend along a preset direction, the two separation protrusions 134 are located on opposite sides of the drainage protrusion 140 in a direction perpendicular to the preset direction, and each separation protrusion 134 and the drainage protrusion 140 enclose a harness slot 131.
From this, through set up the separation convex part 134 that extends along preset direction in the opposite both sides of drainage convex part 140 respectively in the perpendicular to preset direction, can form two pencil grooves 131 that extend along preset direction in the opposite both sides of drainage convex part 140, on the one hand, can increase the accommodation space of pencil groove 131, on the other hand, because pencil groove 131 extends along preset direction, and preset direction is the length direction of battery module 100 promptly, consequently, can make the pencil be straight line shape accommodation along preset direction, avoid leading to pencil insulating layer ageing or fracture because of the pencil buckles for a long time, the life of pencil has been improved, and then the stability of battery module 100 use has been improved.
In some possible embodiments, referring to fig. 11 and 12, the harness collecting part 130 is provided with a first fastening hole 135, the exhaust hood 121 is provided with a second fastening hole 136, and the exhaust hood 121 is fixed to the harness collecting part 130 by passing fasteners through the first fastening hole 135 and the second fastening hole 136 in sequence.
The fasteners may be bolts, screws, etc., and the first fastening holes 135 and the second fastening holes 136 each include a plurality of first fastening holes 135 and second fastening holes 136 in one-to-one correspondence.
Because the fastening members sequentially pass through the first fastening holes 135 and the second fastening holes 136, the exhaust hood 121 is fixed on the harness collecting piece 130, and thus, compared with the fastening, the firmness of fixing the exhaust hood 121 on the harness collecting piece 130 is improved.
Referring to fig. 14, the embodiment of the present application also provides an electric device 200, where the electric device 200 includes the battery module 100.
The battery module 100 in the embodiment of the present application may have the same structure as any one of the battery modules 100 in the embodiment described above, and may bring about the same or similar beneficial effects, and specifically, reference may be made to the description in the embodiment described above, which is not repeated herein.
In addition, the power utilization device 200 may be a device requiring electric energy, such as a new energy automobile, a blowing system, a cooling system, and a heating system.
In the present embodiment, since the power consumption device 200 includes the battery module 100 in the above-described embodiment, the air flow generated when thermal runaway occurs in any one of the unit cells 110 in the battery module 100 can be recovered and collected, thereby reducing the degree of environmental pollution of the power consumption device 200.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (12)
1. A battery module, comprising:
the plurality of single batteries are arranged along a preset direction, and an explosion-proof valve is arranged at the top of each single battery;
the gas collection assembly comprises an exhaust hood and a collection piece, the exhaust hood is positioned at the top of the plurality of single batteries, the exhaust hood comprises an air inlet and an air outlet, the air inlet covers the plurality of explosion-proof valves, so that air flow discharged during pressure relief of the explosion-proof valves enters the exhaust hood through the air inlet, and an opening of the collection piece is connected with the air outlet so as to collect the air flow passing through the air outlet;
The collecting piece is configured to bend towards the single battery at one end far away from the air outlet so as to form a hook part;
the exhaust hood is provided with a storage position for storing the collecting piece wound and rolled;
the exhaust hood further comprises a supporting plate and a surrounding and blocking piece, wherein the supporting plate is laminated on the tops of the single batteries, the surrounding and blocking piece is arranged on the supporting plate, and a space formed by surrounding the supporting plate and the surrounding and blocking piece is the storage position;
the exhaust hood further comprises a protection plate connected to one side edge of the support plate, which is far away from the explosion-proof valve, and the one side edge of the protection plate, which is far away from the explosion-proof valve, exceeds the end part of the collecting piece or is flush with the end part of the collecting piece when the collecting piece extends out; or alternatively, the first and second heat exchangers may be,
the battery module further comprises a plurality of tabs, the poles of every two adjacent single batteries are fixedly connected through one tab, the protection plate is laminated on the tabs, and the edge of one side, far away from the explosion-proof valve, of the protection plate is flush with the edge of the tab;
a gas-liquid separation part is arranged in the exhaust hood and is used for separating liquid in the airflow so that the separated airflow enters the collecting part through the air outlet;
The gas-liquid separation piece is an asbestos piece;
the exhaust hood further comprises a guide plate arranged in the exhaust hood, the guide plate is used for dividing the internal space of the exhaust hood into a first space close to the explosion-proof valve and a second space far away from the explosion-proof valve, the air inlet is communicated with the first space, the air outlet is communicated with the second space, a plurality of mounting through holes are formed in the guide plate, and the asbestos pieces are respectively mounted in the plurality of mounting through holes; or alternatively, the first and second heat exchangers may be,
the exhaust hood further comprises a plurality of guide blocks arranged in the exhaust hood, the guide blocks are arranged on the top wall of the exhaust hood in an array mode to form a plurality of air flow channels communicated with the air inlets, the air outlets are respectively communicated with the air flow channels, and the asbestos pieces are respectively arranged in the air flow channels.
2. The battery module according to claim 1, wherein the opening of the collecting member is hermetically connected to the air outlet of the exhaust hood by a clip or ultrasonic welding.
3. The battery module according to claim 1, wherein the collecting member is a polyamide resin collecting member or a polyamide fabric collecting member.
4. The battery module according to any one of claims 1 to 3, wherein the air outlets include two, and the two air outlets are symmetrically provided on the two outer side walls of the exhaust hood, respectively;
the collecting piece comprises two collecting pieces, and openings of the two collecting pieces are respectively connected with the two air outlets.
5. The battery module according to any one of claims 1 to 3, further comprising a wire harness collecting member, wherein the wire harness collecting member is disposed at the top of a plurality of the single batteries and covers a plurality of the explosion-proof valves, a wire harness groove and a plurality of avoidance through holes are formed in the wire harness collecting member, the plurality of avoidance through holes are in one-to-one correspondence with the plurality of the explosion-proof valves, and the exhaust hood is disposed at the top of a plurality of the single batteries through the wire harness collecting member.
6. The battery module of claim 5, wherein the harness acquisition member comprises a plurality of first sub-acquisition members detachably spliced in sequence along the predetermined direction.
7. The battery module according to claim 6, wherein in the preset direction, one end of the first sub-collecting member is provided with a clamping hole, and the other end of the first sub-collecting member is provided with a clamping protrusion, and the clamping hole on the first sub-collecting member is matched with the clamping protrusion on the adjacent first sub-collecting member.
8. The battery module according to claim 5, wherein the harness collecting member is further provided with a plurality of partition collars protruding toward the exhaust hood, the partition collars are in one-to-one correspondence with the plurality of escape through holes, and the partition collars surround the peripheral edges of the corresponding escape through holes.
9. The battery module according to claim 8, wherein the exhaust hood is provided with a drainage protrusion protruding toward one side of the unit cell, the drainage protrusion has an inner space communicating with the air inlet, the drainage protrusion is sealed and sleeved on the plurality of separation collars, and the wire harness groove is located between the exhaust hood and the wire harness collecting member.
10. The battery module according to claim 9, wherein two partition protrusions are provided protruding toward one side of the exhaust hood from the harness collecting member, the two partition protrusions extend in the predetermined direction, the two partition protrusions are located on opposite sides of the drainage protrusion in a direction perpendicular to the predetermined direction, and each partition protrusion and the drainage protrusion enclose one harness groove.
11. The battery module according to claim 5, wherein the harness collecting part is provided with a first fastening hole, the exhaust hood is provided with a second fastening hole, and the exhaust hood is fixed to the harness collecting part by sequentially passing through the first fastening hole and the second fastening hole by a fastening member.
12. An electrical device comprising the battery module of any one of claims 1-11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN117080673A (en) | 2023-11-17 |
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