CN214971366U - Battery module and battery pack - Google Patents
Battery module and battery pack Download PDFInfo
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- CN214971366U CN214971366U CN202120388266.3U CN202120388266U CN214971366U CN 214971366 U CN214971366 U CN 214971366U CN 202120388266 U CN202120388266 U CN 202120388266U CN 214971366 U CN214971366 U CN 214971366U
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- thermal runaway
- accommodating cavity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model belongs to the technical field of battery production and manufacture, in particular to a battery module, which comprises a plurality of batteries (1) provided with safety valves (11) and poles (12); the fire extinguishing structure (2) is arranged above the batteries (1) and comprises an integrated or separated accommodating cavity (21) and a wiring harness isolation plate (3); the thermal runaway prevention material is contained in the containing cavity (21), the containing cavity (21) is melted through at a set temperature, and the thermal runaway prevention material is released to the battery (1). The utility model discloses a melt and wear out the structure of putting out a fire, release thermal runaway prevention material helps preventing the thermal runaway between the battery, improves the security of battery.
Description
Technical Field
The utility model belongs to the technical field of the battery production is made, concretely relates to battery module and battery package.
Background
Nowadays, green, high-efficiency secondary batteries are vigorously developed in various countries. The lithium ion battery as a novel secondary battery has the advantages of large energy density and power density, high working voltage, light weight, small volume, long cycle life, good safety, environmental protection and the like, and has wide application prospect in the aspects of portable electric appliances, electric tools, large-scale energy storage, electric traffic power supplies and the like. In order to obtain higher energy or power, a plurality of batteries are often connected to form a module or a battery pack, in the current power battery, if the battery is abused or misused, gas, a large amount of heat or other substances are likely to be generated inside the battery, explosion is also likely to occur, and in order to obtain high volume energy, the space between the plurality of batteries is relatively small, so that the abnormal battery is easy to cause peripheral chain reaction and even thermal runaway.
In current structure, use one to be equipped with the jar of putting out a fire of medicament to certain pressure has been pre-installed, again use the union coupling to go into the battery package to this jar, be provided with the shutoff valve on this pipeline, when the conflagration takes place, should in time open the shutoff valve, through the pressure in the jar of putting out a fire to put out a fire the medicament injection battery box in, reach and put out a fire or cool down the purpose, prevent that the disaster from further expanding, nevertheless this structure has following defect: (1) a pressure tank with certain pressure is required to be additionally equipped; (2) the pressure tank needs to be measured and checked for safety at regular intervals; (3) installing the pressure tank at an additional place; (4) more accessory spare parts are needed, such as valve bodies, conveying pipelines and sealing connecting pieces for entering and exiting the box body; (5) the triggering mode is unreliable, the switch valve body is triggered by temperature induction or salt fog induction in the battery pack, and the failure risk is high.
SUMMERY OF THE UTILITY MODEL
One of the purposes of the utility model lies in: to prior art's not enough, provide a battery module, put out a fire the structure through melting, release thermal runaway prevention material helps preventing the thermal runaway between the battery, improves the security of battery.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a battery module comprises a plurality of batteries, a safety valve and a pole; the fire extinguishing structure is arranged above the batteries and comprises an integrated or split accommodating cavity and a wiring harness isolation plate; the thermal runaway prevention material is contained in the containing cavity, the containing cavity is melted through at a set temperature, and the thermal runaway prevention material is released to the battery.
Preferably, the structure of putting out a fire is provided with a plurality of strengthening rib, and a plurality of strengthening rib interval sets up hold the intracavity, be used for with hold the chamber and divide into a plurality of cavity, the strengthening rib is provided with intercommunication groove or intercommunicating pore.
Preferably, one end or two ends of the accommodating cavity in the length direction are provided with openings for injecting the thermal runaway prevention material, sealing plates are installed on the openings, and the accommodating cavity forms a closed space after the openings are sealed.
Preferably, an injection hole for injecting the thermal runaway prevention material is formed in an end of the accommodating cavity, and the accommodating cavity forms a closed space after the injection hole is blocked.
Preferably, it is the metal material to hold the chamber, the metal material includes aluminium or aluminum alloy, it casts, metal extrusion section bar or metal machine tooling formation through the metal to hold the chamber, the surface that holds the chamber is provided with the insulating layer, the forming method of insulating layer is at least one of electrophoresis, spraying coating, spraying plastics, oxidation rubber coating, cover insulating film and cover plastic tubing, the closing plate with opening fixed connection, fixed connection's mode includes at least one in welding and the bonding.
Preferably, it is the plastic material to hold the chamber, the plastic material includes at least one in PSU, PPS, PPO, PA, the PP, the closing plate with opening fixed connection, fixed connection's mode includes at least one in welding, butt fusion and the bonding.
Preferably, the injection hole is sealed by a sealing nail, and the sealing nail is fixed by at least one of welding, bonding and interference plug insertion.
Preferably, the surface of the sealing nail is covered by structural adhesive coating, and the sealing nail is a thin sheet, a tapered wedge-shaped column or a steel ball.
Preferably, the communicating groove is provided at an end close to the opening, and the communicating grooves of the plurality of reinforcing ribs are arranged in the width direction.
Preferably, when the accommodating cavity is made of a metal material, the accommodating cavity is embedded in the wiring harness isolation plate which is integrally injection-molded with the accommodating cavity; when hold the chamber and be the plastic material, it sets up to hold the chamber the top or the below of pencil division board, hold the chamber with at least one of pencil division board is provided with card portion and/or knot portion, hold the chamber with pencil division board buckle is connected.
Preferably, the wire harness isolation plate further comprises a connecting plate, a plurality of pole column through holes and mounting grooves are formed in the top of the wire harness isolation plate, the pole columns penetrate through the pole column through holes to be fixedly connected with the connecting plate, the fire extinguishing structure is fixedly connected with the mounting grooves, and one surface, facing the safety valve, of the fire extinguishing structure is of a plane structure.
Preferably, the thermal runaway prevention material is at least one of a coolant, an electrolyte additive and a fire extinguishing agent.
Preferably, the thermal runaway prevention material is fluoropropane, heptafluoropropane, perfluorohexane, perfluorohexanone, aerosol, carbon dioxide, ammonium perfluorooctanoate, ethoxypentafluorocyclotriphosphazene, hexafluoropropylene trimer, tris (2,2, 2-trifluoroethyl) phosphate, perfluorononene.
The second objective of the present invention is to provide a battery pack, including the above battery module.
The utility model has the advantages that the utility model comprises a plurality of batteries, which are provided with safety valves and pole columns; the fire extinguishing structure is arranged above the batteries and comprises an integrated or split accommodating cavity and a wiring harness isolation plate; wherein, hold the intracavity and hold and to have held the thermal runaway material, hold the chamber and melt under the set temperature and wear, to battery release thermal runaway material. The existing structure has the following defects that a pressure tank with certain pressure needs to be additionally arranged; the pressure tank needs to be measured and checked for safety at regular intervals; installing the pressure tank at an additional place; more accessory spare parts are needed, such as valve bodies, conveying pipelines and sealing connecting pieces for entering and exiting the box body; the triggering mode is unreliable, the switch valve body is triggered by temperature induction or salt fog induction in the battery pack, the failure risk is high, therefore, the accommodating cavity 21 is adopted to encapsulate the thermal runaway prevention material, the thermal runaway prevention material is installed right above or below a plurality of batteries through the wiring harness isolation plate, when the batteries are abused or used wrongly, the safety valve can be flushed by the high-temperature substance in the batteries, the bottom surface of the fire extinguishing structure is locally melted by the high-temperature substance, the thermal runaway prevention material in the fire extinguishing structure directly flows out or is sprayed onto the batteries to play the roles of cooling and fire extinguishing, the thermal runaway of the batteries can be prevented, compared with the existing fire extinguishing device, the pressure tank and the position where the pressure tank is reserved to be installed are omitted, the thermal runaway prevention material in the fire extinguishing structure directly flows or is sprayed onto the thermal runaway batteries and the periphery, the thermal runaway prevention material is direct and effective, and in addition, the mechanical strength is good when the fire extinguishing device is normally used, there is not the risk of inefficacy, simultaneously, the structure of putting out a fire is in the battery module, is equivalent to independent spare part, is convenient for dismantle and installs, helps reducing the production and the cost of maintenance of module. The utility model discloses a melt and wear out the structure of putting out a fire, release thermal runaway prevention material helps preventing the thermal runaway between the battery, improves the security of battery.
Drawings
Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is an exploded view of a first embodiment of the present invention.
Fig. 3 is a schematic structural view of the fire extinguishing structure and the assembled wire harness partition board according to the first embodiment of the present invention.
Fig. 4 is a schematic view of the first embodiment of the present invention before the sealing nail is installed in the accommodating cavity.
Fig. 5 is a schematic view of the first embodiment of the present invention after the sealing nail is installed in the accommodating cavity.
Fig. 6 is a schematic cross-sectional view of the accommodating chamber according to the first embodiment of the present invention in the width direction.
Fig. 7 is a schematic sectional view of the accommodating chamber according to the first embodiment of the present invention in the longitudinal direction.
Fig. 8 is a schematic structural view of the accommodating chamber according to the first embodiment of the present invention before the sealing plate is mounted.
Wherein the reference numerals are as follows:
1-a battery; 11-safety valve; 12-pole column;
2-a fire extinguishing structure; 21-a containing cavity; 22-reinforcing ribs; 23-a sealing plate; 24-sealing the nail; 211-an opening; 221-a communication groove; 231-an injection hole;
3-a wiring harness isolation plate; 31-pole through hole; 32-mounting grooves; 33-hollow structure;
4-connecting plates;
10-an end plate; 20-side plate; 30-module film cover;
x-length direction; y-width direction.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, detachable connections, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The present invention will be described in further detail with reference to fig. 1 to 8, but the present invention is not limited thereto.
Implementation mode one
A battery module comprises a plurality of batteries 1, a safety valve 11 and a pole 12; the fire extinguishing structure 2 is arranged above the batteries 1 and comprises an integrated or separated accommodating cavity 21 and a wiring harness isolation plate 3; wherein, the thermal runaway prevention material is contained in the containing cavity 21, and the containing cavity 21 is melted through at a set temperature to release the thermal runaway prevention material to the battery 1.
The existing structure has the following defects that a pressure tank with certain pressure needs to be additionally arranged; the pressure tank needs to be measured and checked for safety at regular intervals; installing the pressure tank at an additional place; more accessory spare parts are needed, such as valve bodies, conveying pipelines and sealing connecting pieces for entering and exiting the box body; the triggering mode is unreliable, the switch valve body is triggered by temperature induction or salt spray induction in the battery pack, the failure risk is high, therefore, as shown in fig. 1 to 8, the accommodating cavity 21 is adopted to encapsulate the thermal runaway prevention material, the thermal runaway prevention material is installed right above or below the batteries 1 through the wiring harness isolation plate 3, when the batteries 1 are abused or used wrongly, the safety valve 11 can be flushed by high-temperature substances in the batteries 1, the bottom surface of the fire extinguishing structure 2 is locally melted by the high-temperature substances, the thermal runaway prevention material in the fire extinguishing structure 2 directly flows out or is sprayed onto the batteries 1 to play a role in cooling and fire extinguishing, the thermal runaway of the batteries 1 can be prevented, compared with the existing fire extinguishing device, the positions of the pressure tank and the reserved installation pressure tank are saved, and the thermal runaway prevention material in the fire extinguishing structure 2 directly flows or is sprayed onto the thermal runaway batteries and the periphery, directly and effective, in addition, when normal use, have better mechanical strength, do not have the risk of inefficacy, simultaneously, the structure of putting out a fire 2 is in the battery module, is equivalent to independent spare part, is convenient for dismantle and installs, helps reducing the production and the cost of maintenance of module.
The safety valve 11 can be opened by the safety valve 11 when the internal air pressure of the battery 1 is increased to a certain degree, the general opening pressure is set to be 0.02-1.00 MPa, preferably, the opening pressure can be set to be 0.6MPa, in addition, the safety valve 11 can also be opened by internal high-temperature substances, the temperature of the high-temperature substances is 700-1000 ℃, and the high-temperature substances melt the fire extinguishing structure 2 partially.
In the battery module according to the utility model discloses, see that fig. 8 shows, structure 2 of putting out a fire is provided with a plurality of strengthening rib 22, and a plurality of strengthening rib 22 interval sets up in holding chamber 21 for will holding chamber 21 and fall into a plurality of cavity, strengthening rib 22 is provided with intercommunication groove 221 or intercommunicating pore. Specifically, the accommodating cavity 21 has the function of accommodating the thermal runaway prevention material, the thermal runaway prevention material is prevented from leaking when the battery 1 is normally used, according to the actual battery structure and the cost requirement, the accommodating cavity 21 can be internally provided with the reinforcing ribs 22 or not provided with the reinforcing ribs 22, the reinforcing ribs 22 not only can divide the accommodating cavity 21 into a plurality of cavities, but also can play a role of supporting the fire extinguishing structure 2, the accommodating cavity 21 is prevented from being too large, the fire extinguishing structure 2 is hollowed out to be easily deformed under pressure, the stress of the fire extinguishing structure 2 is uniform, the fire extinguishing structure 2 is ensured to have enough strength, the probability of deformation or damage of the fire extinguishing structure 2 is reduced, meanwhile, the reinforcing ribs 22 are provided with the communication grooves 211 or the communication holes, the function of communicating the plurality of cavities is realized, the thermal runaway prevention material is conveniently injected into each cavity, the repeated injection of the thermal runaway prevention material into each cavity is omitted, the injection efficiency of the thermal runaway prevention material is improved, the situation that the thermal runaway prevention material of each cavity is uneven is avoided, wherein the reinforcing ribs 22 can be provided with the communicating grooves 211 or the communicating holes to communicate with each cavity, in the embodiment, the communicating grooves 211 are square, but the utility model discloses not this limitation, circular, oval or square communicating holes can also be adopted, and it is enough to communicate each cavity; the cross section of the plurality of cavities can be square, round or oval, and the thermal runaway prevention material can be accommodated.
In the battery module according to the present invention, as shown in fig. 8, one end or both ends of the accommodating chamber 21 in the length direction X are provided with an opening 211 for injecting the thermal runaway prevention material, and the sealing plate 23 is installed on the opening 211, so that the accommodating chamber 21 forms a closed space after the opening 211 is sealed. In this embodiment, the accommodating cavity 21 is formed by machining a metal section cavity or an aluminum plate, the accommodating cavity 21 may have an opening 211 at one end in the length direction X, the other end is closed in advance when the accommodating cavity 21 is formed, the sealing plate 23 may close the opening 211, the closing method may use carbon dioxide protection welding, laser, argon arc, resistance welding and gluing, preferably laser welding, so that the accommodating cavity 21 forms a closed space, in order to facilitate injecting the thermal runaway prevention material into the closed space, the thermal runaway prevention material may be placed before the sealing plate 23 is closed or after the sealing plate 23 is closed, specifically, the thermal runaway prevention material is placed into the accommodating cavity 21 from the opening 211, then the opening 211 is closed by the sealing plate 23, or a filling hole 231 may be reserved at an end of the accommodating cavity 21, after increasing the airtight detection after encapsulation, the filling hole 231 is finally closed, the situation that the thermal runaway prevention material leaks is prevented.
In addition, the surface that holds chamber 21 is provided with the insulating layer, the insulating layer can play the effect that the chamber 21 and the battery module were held to the interval metal, it takes place the probability of short circuit to reduce the metal and hold chamber 21 and battery module, the formation mode of insulating layer is at least one of electrophoresis, spraying plastics, oxidation rubber coating, cover insulating film and cover plastic tubing, it is concrete, can use at least one mode among electrophoresis, spray paint, spraying plastics, dusting, dip plastics, anodic oxidation, cover plastics poling, the pipe that cover plastics blind hole shutoff was passed, cladding plastic insulation film, the cladding plastics.
According to the utility model discloses an among the battery module, hold chamber 21 and be the metal material, the metal material includes aluminium or aluminum alloy, holds chamber 21 and forms through metal casting, metal extrusion section bar or metal machining, closing plate 23 and opening 211 fixed connection, and fixed connection's mode is including welding and bonding in at least one. In the present embodiment, the receiving cavity 21 may be made of pure aluminum or aluminum alloy, preferably 6 series aluminum, such as 6063 aluminum, and the specific processing technology is aluminum casting, aluminum extruded profile or aluminum machining, preferably aluminum extruded profile, in order to improve the stability of the sealing plate 23 and the opening 211 and reduce the probability of leakage of the thermal runaway prevention material, the sealing plate 23 and the opening 211 may be fixedly connected by carbon dioxide protection welding, laser, argon arc, resistance welding and glue coating, preferably laser welding.
According to the utility model discloses an among the battery module, hold chamber 21 inlay in with hold chamber 21 integrative injection moulding's pencil division board 3. In this embodiment, the wiring harness isolation plate 3 and the accommodating cavity 21 can adopt an integrated structure, that is, the metal accommodating cavity 21 is embedded into the wiring harness isolation plate 3 integrally formed with the accommodating cavity 21, which is helpful for improving the stability and strength between the wiring harness isolation plate 3 and the accommodating cavity 21, and also saves the process of separately producing the wiring harness isolation plate 3, which is helpful for reducing the production cost.
In the battery module according to the present invention, the thermal runaway prevention material is at least one of a coolant, an electrolyte additive and a fire extinguishing agent. The thermal runaway prevention material is at least one of fluoropropane, heptafluoropropane, perfluorohexane, perfluorohexanone, aerosol, carbon dioxide, ammonium perfluorooctanoate, ethoxy pentafluorocyclotriphosphazene, hexafluoropropylene trimer, tris (2,2, 2-trifluoroethyl) phosphate and perfluorononene.
The utility model discloses a theory of operation is:
adopt and hold the cavity 21 and encapsulate the material of thermal runaway, and install directly over several batteries 1 or below through the pencil division board 3, when the battery 1 takes place the battery and is abused or misused, the high-temperature material in the battery 1 can break open the relief valve 11, the bottom surface local melting of the structure 2 of putting out a fire is put to the high-temperature material, the material of thermal runaway in the structure 2 of putting out a fire directly flows out or spouts on the battery 1, play the role of cooling and putting out a fire, can prevent the battery 1 from taking place the thermal runaway, compare the existing extinguishing device, has saved the position equipped with pressure tank and reserved installation pressure tank, and the material of thermal runaway in the structure 2 of putting out a fire directly flows or spouts the battery of thermal runaway and around, it is direct and effective, in addition, when normally using, have better mechanical strength, there is no risk of losing efficacy, meanwhile, the structure 2 of putting out a fire is in the battery module, equivalent to independent spare part, the module is convenient to disassemble and assemble, and the production and maintenance cost of the module is reduced.
Second embodiment
The difference from the first embodiment is that: the end of the containing cavity 21 of the embodiment is provided with an injection hole 231 for injecting a thermal runaway prevention material, the containing cavity 21 forms a closed space after the injection hole 231 is plugged, the injection hole 231 is plugged by a sealing nail 24, the sealing nail 24 is fixed by at least one of welding, bonding and interference plug plugging, the surface of the sealing nail is coated and covered by structural adhesive, and the sealing nail 24 is a sheet, a tapered wedge-shaped column or a steel ball. Specifically, a sheet can be put in, a sealing nail 24 made of the same material and having a size interference of 0.02-1.00 mm, a steel ball or other materials can be knocked in, the sealing nail 24 can be fixed by laser or argon arc welding, the sealing nail 24 can also be directly fixed by interference fit or clamping, and preferably, structural glue can be coated on the surfaces of the injection hole 231 and the sealing nail 24 to meet the requirement of fixing the sealing nail 24.
Other structures are the same as those of the first embodiment, and are not described herein again.
Third embodiment
The difference from the first embodiment is that: the chamber 21 that holds of this embodiment is the plastic material, and the plastic material includes at least one in PSU, PPS, PPO, PA, PP, closing plate 23 and opening 211 fixed connection, and fixed connection's mode includes at least one in welding, butt fusion and the bonding, and the intercommunication groove 221 sets up in the one end that is close to opening 211, and the intercommunication groove 221 of a plurality of strengthening rib 22 is arranged along width direction Y. In this embodiment, the accommodating cavity 21 may also be made of a plastic material, and since the plastic material has an insulating property, it is not necessary to form an insulating layer on the surface of the accommodating cavity 21, which is helpful for simplifying the production process and reducing the production cost, specifically, the accommodating cavity 21 is formed by injection molding, one end or both ends of the accommodating cavity 21 in the length direction X are provided with openings 211, the other end is closed in advance when the accommodating cavity 21 is molded, the sealing plate 23 can close the openings 211, the sealing method may adopt ultrasonic welding, thermal welding, hot plate fusion welding, preferably hot plate fusion welding, so that the accommodating cavity 21 forms a closed space, in order to facilitate injecting the thermal runaway prevention material into the closed space, the thermal runaway prevention material may be placed before the sealing plate 23 is closed or after the sealing plate 23 is closed, specifically, the thermal runaway prevention material is placed into the accommodating cavity 21 from the openings 211, then, the opening 211 is sealed by a sealing plate 23, or injection holes 231 are reserved at two ends of the opening, after the air tightness detection after the packaging is increased, the injection holes 231 are sealed finally, and the situation that the thermal runaway prevention material leaks is prevented; after the opening 211 is closed, an air-tight test may be performed from the reserved injection hole 231, the thermal runaway prevention material may be poured from the injection hole 231, and then the injection hole 231 may be sealed and sealed, and the injection hole 231 may be sealed and sealed by striking a sealing nail 24 of the same material sheet, steel ball or other material with a size interference of 0.05 to 1.00mm, and by using ultrasonic welding, thermal welding or hot plate fusion welding, preferably, structural adhesive may be applied to the surfaces of the injection hole 231 and its accessories. Because plastics generally adopt injection moulding, mainly because the drawing of patterns reason, the demolding piece is the metalwork that coincide this position, and after plastics cooling shaping, just can deviate from this metalwork, consequently set up the intercommunication groove 221 in the one end that is close to opening 211, this metalwork can only deviate from automatically, and the intercommunication groove 221 of a plurality of strengthening rib 22 is arranged along width direction Y, can improve the intensity of plastics, can also form the closed space after holding chamber 21, forms the intercommunication structure between the cavity, and the thermal runaway material of the package of being convenient for makes a round trip freely. If the communicating groove 221 is not formed, when the two ends are closed, the cavities are independent or sealed, the cavities may not be located right above the safety valve 11 of the battery 1, when the safety valve 11 of the battery 1 is opened to spray high-temperature substances, the thermal runaway prevention materials inside the cavities may not be sprayed or flow out, and the thermal runaway prevention materials inside the accommodating cavity 21 cannot achieve a good fire extinguishing effect.
Preferably, as shown in fig. 1 and 2, the accommodating cavity 21 is made of plastic, the accommodating cavity 21 is disposed above or below the harness isolation plate 3, the battery module further includes a connecting plate 4, the top of the harness isolation plate 3 is provided with a plurality of pole through holes 31 and an installation groove 32, the pole 12 penetrates through the pole through holes 31 and is fixedly connected with the connecting plate 4, the fire extinguishing structure 2 and the installation groove 32 are fixedly connected, and the fire extinguishing structure 2 is a plane structure facing the safety valve 11. In the present embodiment, the accommodating chamber 21 and the harness isolation plate 3 may be of a split structure, that is, the accommodating chamber 21 is disposed above or below the harness isolation plate 3, because the residual space on the upper part of the battery core in the module is smaller, the strength of the accommodating cavity 21 made of plastic is poorer than that of metal, in order to ensure that the accommodating chamber 21 has good strength, the wire harness isolation plate 3 has a thick wall thickness, the side surface of the accommodating chamber 21, namely the height direction, is small, and the connecting plate 4 and the mounting groove 32 are preset around, therefore, the accommodating cavity 21 made of the plastic material cannot be integrally formed with the wire harness isolation plate 3, and meanwhile, the accommodating cavity 21 made of the plastic material is integrally injection-molded with the wire harness isolation plate 3 after the explosion-proof material is encapsulated by the side opening, so that the process is waste, that is, the secondary injection molding is not needed, so the plastic accommodating cavity 21 does not adopt the integral forming process of the first embodiment; the pole 12 passes through the pole through hole 31 to be fixedly connected with the connecting plate 4, so as to play a role of connecting a plurality of batteries 1 in series or in parallel, the mounting groove 32 at the top of the wire harness isolation plate 3 plays a role of supporting the connecting plate 4, so as to reduce the probability of deviation or shaking of the connecting plate 4, the pole 12 and the connecting plate 4 are fixedly connected in a welding mode, so as to be beneficial to improving the stability between the pole 12 and the connecting plate 4, in addition, at least one of the fire extinguishing structure 2 and the mounting groove 32 is provided with a clamping part and/or a buckling part, and the fire extinguishing structure 2 is connected with the mounting groove 32 in a buckling way, but the utility model discloses not limited by this, at least one of bonding and riveting can be adopted to fixedly connect the fire extinguishing structure 2 and the mounting groove 32, so as to realize that the fire extinguishing structure 2 is mounted at the top of the wire harness isolation plate 3, and simultaneously, the bottom of the wire harness isolation plate 3 is provided with a hollow structure 33 matched with the fire extinguishing structure 2, make fire extinguishing structure 2 just to relief valve 11, can take place the battery at battery 1 and be abused or when the error use, the inside high temperature material of battery 1 can break away relief valve 11, high temperature material passes hollow out construction 33, bottom surface local melting to fire extinguishing structure 2, the thermal runaway material direct outflow in the fire extinguishing structure 2 or spout on battery 1, play the effect of cooling and putting out a fire, can prevent that battery 1 from taking place the thermal runaway, and simultaneously, fire extinguishing structure 2 is just to being planar structure in the one side of relief valve 11, can reduce the height after the equipment of fire extinguishing structure 2 and pencil division board 3, reduce and encroach on the inside space of battery module, help improving the space utilization of battery module, thereby improve the energy density of battery module.
Other structures are the same as those of the first embodiment, and are not described herein again.
Embodiment IV
A battery pack includes the battery module of the first embodiment.
It should be noted that, the battery module still includes end plate 10 and curb plate 20, and end plate 10 and curb plate 20 enclose into the frame that is used for holding a plurality of battery 1, can surround a plurality of battery 1, avoid battery 1 to take place the displacement or rock, help improving the stability of a plurality of battery 1.
Fifth embodiment
A battery pack includes the battery module of the second embodiment.
It should be noted that: the battery module further includes a module film cover 30, the module film cover 30 is disposed above the harness isolation plate 3, and the module film cover 30 covers the harness isolation plate 3. Module membrane lid 30 is the plastic piece, plays insulating effect, through covering pencil division board 3, plays the effect of sheltering from connecting plate 4, avoids connecting plate 4 and outside part to take place the short circuit.
Sixth embodiment
A battery pack includes the battery module of the third embodiment.
Variations and modifications to the above-described embodiments may become apparent to those skilled in the art from the disclosure and teachings of the above description. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious modifications, replacements or variations made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (13)
1. A battery module, comprising:
the battery packs (1) are provided with safety valves (11) and poles (12);
the fire extinguishing structure (2) is arranged above the batteries (1) and comprises an integrated or separated accommodating cavity (21) and a wiring harness isolation plate (3);
the thermal runaway prevention material is contained in the containing cavity (21), the containing cavity (21) is melted through at a set temperature, and the thermal runaway prevention material is released to the battery (1).
2. The battery module according to claim 1, wherein: the fire extinguishing structure (2) is provided with a plurality of reinforcing ribs (22), and a plurality of reinforcing ribs (22) interval sets up hold in the chamber (21), be used for with hold chamber (21) and divide into a plurality of cavity, reinforcing rib (22) are provided with intercommunication groove (221) or intercommunicating pore.
3. A battery module according to claim 1 or 2, wherein: one end or two ends of the accommodating cavity (21) in the length direction (X) are provided with openings (211) for injecting the thermal runaway prevention material, sealing plates (23) are installed on the openings (211), and the accommodating cavity (21) forms a closed space after the openings (211) are sealed.
4. A battery module according to claim 1 or 2, wherein: an injection hole (231) for injecting the thermal runaway prevention material is formed in the end of the accommodating cavity (21), and the accommodating cavity (21) forms a closed space after the injection hole (231) is blocked.
5. A battery module according to claim 3, wherein: hold chamber (21) and be the metal material, the metal material includes aluminium or aluminum alloy, it casts through metal, metal extrusion section bar or metal machine tooling formation to hold chamber (21), the surface that holds chamber (21) is provided with the insulating layer, the forming method of insulating layer is at least one of electrophoresis, spraying plastics, oxidation rubber coating, cover insulating film and cover plastic tubing, closing plate (23) with opening (211) fixed connection, fixed connection's mode includes at least one in welding and the bonding.
6. A battery module according to claim 3, wherein: hold chamber (21) and be the plastic material, the plastic material includes one of PSU, PPS, PPO, PA, PP, closing plate (23) with opening (211) fixed connection, fixed connection's mode includes at least one in welding, butt fusion and the bonding.
7. The battery module according to claim 4, wherein: the injection hole (231) is plugged by a sealing nail (24), and the sealing nail (24) is fixed by at least one of welding, bonding and interference plug plugging.
8. The battery module according to claim 7, wherein: the surface of the sealing nail is coated and covered by structural adhesive, and the sealing nail (24) is a thin sheet, a tapered wedge-shaped column or a steel ball.
9. The battery module according to claim 1, wherein: when the accommodating cavity (21) is made of metal, the accommodating cavity (21) is embedded in the wiring harness isolation plate (3) which is integrally injection-molded with the accommodating cavity (21); work as hold chamber (21) and be the plastic material, it sets up to hold chamber (21) the top or the below of pencil division board (3), hold chamber (21) with at least one of pencil division board (3) is provided with card portion and/or knot portion, hold chamber (21) with pencil division board (3) buckle is connected.
10. The battery module according to claim 1, wherein: still include connecting plate (4), the top of pencil division board (3) is provided with a plurality of utmost point post through-hole (31) and mounting groove (32), utmost point post (12) pass utmost point post through-hole (31) with connecting plate (4) fixed connection, put out a fire structure (2) with mounting groove (32) fixed connection, it is just right to put out a fire structure (2) the one side of relief valve (11) is planar structure.
11. The battery module according to claim 1, wherein: the thermal runaway prevention material is one of a coolant, an electrolyte additive and a fire extinguishing agent.
12. The battery module according to claim 11, wherein: the thermal runaway prevention material is one of fluoropropane, heptafluoropropane, perfluorohexane, perfluorohexanone, aerosol, carbon dioxide, ammonium perfluorooctanoate, ethoxy pentafluorocyclotriphosphazene, hexafluoropropylene trimer, tris (2,2, 2-trifluoroethyl) phosphate and perfluorononene.
13. A battery pack, comprising: comprising the battery module according to any one of claims 1 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120388266.3U CN214971366U (en) | 2021-02-22 | 2021-02-22 | Battery module and battery pack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120388266.3U CN214971366U (en) | 2021-02-22 | 2021-02-22 | Battery module and battery pack |
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| Publication Number | Publication Date |
|---|---|
| CN214971366U true CN214971366U (en) | 2021-12-03 |
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| CN202120388266.3U Active CN214971366U (en) | 2021-02-22 | 2021-02-22 | Battery module and battery pack |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115282544A (en) * | 2022-08-25 | 2022-11-04 | 嘉兴港区金安环保新材料有限公司 | Lithium battery fire extinguishing agent and lithium battery prepared by using same |
| CN115531770A (en) * | 2022-03-31 | 2022-12-30 | 江西新威动力能源科技有限公司 | Fire extinguishing mechanism for power battery |
-
2021
- 2021-02-22 CN CN202120388266.3U patent/CN214971366U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115531770A (en) * | 2022-03-31 | 2022-12-30 | 江西新威动力能源科技有限公司 | Fire extinguishing mechanism for power battery |
| CN115531770B (en) * | 2022-03-31 | 2023-08-08 | 江西新威动力能源科技有限公司 | Power battery fire extinguishing mechanism |
| CN115282544A (en) * | 2022-08-25 | 2022-11-04 | 嘉兴港区金安环保新材料有限公司 | Lithium battery fire extinguishing agent and lithium battery prepared by using same |
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| TR01 | Transfer of patent right |
Effective date of registration: 20220120 Address after: No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zhengli new energy battery technology Co.,Ltd. Address before: 210000 No.15, Huashang Road, Airport Economic Development Zone, Jiangning District, Nanjing City, Jiangsu Province Patentee before: Jiangsu Tafel Power System Co.,Ltd. Patentee before: JIANGSU TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: DONGGUAN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |