CN115602994B - Battery module and electric equipment - Google Patents

Battery module and electric equipment Download PDF

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Publication number
CN115602994B
CN115602994B CN202211350826.1A CN202211350826A CN115602994B CN 115602994 B CN115602994 B CN 115602994B CN 202211350826 A CN202211350826 A CN 202211350826A CN 115602994 B CN115602994 B CN 115602994B
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CN
China
Prior art keywords
guide groove
plate
battery module
explosion
proof valve
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Active
Application number
CN202211350826.1A
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Chinese (zh)
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CN115602994A (en
Inventor
郑振华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xiamen Hithium Energy Storage Technology Co Ltd
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Xiamen Hithium Energy Storage Technology Co Ltd
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Priority to CN202211350826.1A priority Critical patent/CN115602994B/en
Publication of CN115602994A publication Critical patent/CN115602994A/en
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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
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • 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
    • H01M50/271—Lids or covers for the racks or secondary casings
    • 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
    • H01M50/383—Flame arresting or ignition-preventing means
    • 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 invention discloses a battery module and electric equipment. The battery module comprises a box body and a plurality of batteries, wherein the box body comprises a cover plate; the batteries are located in the box body, the batteries comprise a top cover assembly, the top cover assembly comprises an explosion-proof valve, the inner surface of the cover plate is provided with a guide groove extending along the arrangement direction of the batteries, the notch of the guide groove faces the explosion-proof valve, the arrangement direction of the batteries is along, and at least one end of the guide groove is provided with an air outlet. In the battery module, the guide groove is formed in the inner surface of the cover plate, when the explosion-proof valve is used for exhausting, gas exhausted by the explosion-proof valve can enter the guide groove and flow out through the exhaust port of the guide groove, the position of the exhaust port of the guide groove can be set, structural damage and damage to the whole battery system during exhausting of the explosion-proof valve are reduced, and personal safety injury is avoided.

Description

Battery module and electric equipment
Technical Field
The invention relates to the technical field of batteries, in particular to a battery module and electric equipment.
Background
In the prior art, the battery module may have instability in the charging and discharging process, so that the explosion-proof valve of the single battery is exploded outwards to spray high-temperature high-pressure gas, at present, the battery module is mostly provided with exhaust holes corresponding to each battery to discharge high-temperature high-pressure gas, the outward spraying direction of the gas is perpendicular to the module cover plate, the structural damage and the damage of the whole battery system are easily caused, and personal safety injury is caused.
Disclosure of Invention
The embodiment of the invention provides a battery module and electric equipment.
A battery module according to an embodiment of the present invention includes:
the box, the box includes:
a cover plate;
a plurality of batteries located in the case, the batteries comprising:
a cap assembly including an explosion-proof valve;
the inner surface of the cover plate is provided with a guide groove extending along the arrangement direction of the batteries, the notch of the guide groove faces the explosion-proof valve, and at least one end of the guide groove is provided with an air outlet along the arrangement direction of the batteries.
In the battery module, the guide groove is formed in the inner surface of the cover plate, when the explosion-proof valve is used for exhausting, gas exhausted by the explosion-proof valve can enter the guide groove and flow out through the exhaust port of the guide groove, the position of the exhaust port of the guide groove can be set, structural damage and damage to the whole battery system during exhausting of the explosion-proof valve are reduced, and personal safety injury is avoided.
In certain embodiments, the guide groove has a depth selected from the range [5mm,20mm ], and the ratio of the groove width to the groove depth of the guide groove is selected from the range [0.8,1.5].
Thus, the depth of the guide groove is proper and the size of the guide groove is moderate.
In certain embodiments, the slope of the guide slot relative to the horizontal is selected from the range [1 °,10 ° ].
Thus, the gradient of the guide groove is moderate.
In some embodiments, the case includes a first plate and a second plate, the slot width of the guide groove gradually increases from the second plate to the first plate, and the air outlet is adjacent to the first plate.
In this way, the gas outlet can be made to bleed out the gas more quickly.
In some embodiments, the plurality of cells are arranged in at least one cell row, one of the guide grooves is provided above each cell row, and the length of the guide groove is adapted to the length of the cell row so as to be capable of covering all the explosion-proof valves of one cell row.
Therefore, the number of the guide grooves can be reduced, and the structure of the cover plate is simplified.
In certain embodiments, the gap between the guide groove and the explosion proof valve is 15mm or more and 40mm or less.
Thus, the service life of the cover plate can be prolonged.
In some embodiments, the guide groove has a tapered shape in a cross section in a direction away from the explosion-proof valve.
Thus, the collection and the discharge of the gas are facilitated.
In some embodiments, the inner groove surface of the guide groove is provided with a heat insulating layer.
Therefore, the upper layer battery module can be prevented from being heated due to the higher temperature of the cover plate.
In certain embodiments, the cover plate comprises:
the inner surface of the plate body is provided with the guide groove;
the side plates are connected with the side edges of the inner surface of the plate body; and
and the reinforcing ribs are connected with the side plates, the plate body and the side walls of the guide grooves.
Thus, the structural strength and stability of the cover plate can be improved.
In some embodiments, the inner surface of the plate body is provided with a plurality of guide grooves at intervals, and the reinforcing ribs are connected with the side walls of two adjacent guide grooves.
Therefore, the structural strength and stability of the cover plate are further improved.
In some embodiments, the inner surface of the plate body is provided with a plurality of spaced guide grooves, the side plate comprises a front side plate, the front end of the guide groove is provided with the air outlet, the front side plate is spaced from the front end of the guide groove to form an air exhaust channel, and the air exhaust channel is communicated with all the air outlets.
Therefore, the gas of all the guide grooves can be collected in a concentrated mode, and the exhaust of the battery module is facilitated.
The embodiment of the invention comprises the battery module of any embodiment.
Among the above-mentioned consumer, the internal surface of apron is equipped with the guide way, and when explosion-proof valve was discharged, explosion-proof valve exhaust gas can get into the guide way to flow out via the gas vent of guide way, the gas vent position of guide way can be set for, and structural damage and the destruction of whole battery system when reducing the explosion-proof valve and discharging avoid causing personal safety injury.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained from the structures shown in these drawings without the need for inventive effort to a person skilled in the art.
Fig. 1 is a perspective view of a battery module according to an embodiment of the present invention;
fig. 2 is an exploded view of a battery module according to an embodiment of the present invention;
fig. 3 is a sectional view of a battery module according to an embodiment of the present invention;
FIG. 4 is a perspective view of a cover plate according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view of a cover plate according to an embodiment of the present invention;
fig. 6 is a structural view of a battery cluster according to an embodiment of the present invention.
Reference numerals illustrate:
the battery module comprises the following components of a battery module body-100, a box body-12, a battery-14, a cover plate-16, an explosion-proof valve-18, a guide groove-20, a notch-21, an air outlet-22, a lower shell-24, an air inlet-26, a front plate-27, an exhaust fan-28, a battery row-30, a connecting end-32, an inner groove surface-34, a plate body-36, a side plate-38, a reinforcing rib-40, a front side plate-41, an exhaust channel-42, a battery cluster-44 and a cluster frame-46.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present invention, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, as well as, for example, fixedly coupled, detachably coupled, or integrally coupled, unless otherwise specifically indicated and defined. Either mechanically or electrically. Can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. 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.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
Referring to fig. 1 to 4, a battery module 100 according to an embodiment of the present invention includes a case 12 and a plurality of batteries 14. The housing 12 includes a cover 16. A plurality of cells 14 are positioned within the housing 12, the cells 14 including a top cap assembly including an explosion-proof valve 18. Wherein, the inner surface of the cover plate 16 is provided with a guide groove 20 extending along the row direction of the plurality of battery rows 30, the notch 21 of the guide groove 20 faces the explosion-proof valve 18, and at least one end of the guide groove 20 is provided with an air outlet 22 along the row direction of the plurality of battery rows 30.
In the above battery module 100, the guide groove 20 is provided on the inner surface of the cover plate 16, when the explosion-proof valve 18 exhausts, the gas exhausted from the explosion-proof valve 18 can enter the guide groove 20 and flow out through the gas outlet 22 of the guide groove 20, the position of the gas outlet 22 of the guide groove 20 can be set, the structural damage and the damage of the whole battery system when the explosion-proof valve 18 exhausts are reduced, and the personal safety injury is avoided. In addition, the guide groove 20 can prevent the diffusion of heat and improve the safety of the product.
In particular, in the battery module 100 of the embodiment of the invention, compared with a battery module with a wireless beam isolation plate structure in which the guide groove is formed in the beam isolation plate, in the battery module 100 of the embodiment of the invention, the guide groove 20 is formed on the inner surface of the cover plate 16, firstly, the material of the beam isolation plate can be saved, the cost and the overall thickness of the battery module 100 can be reduced, secondly, the weight of the battery module 100 can be reduced, and further the energy density of the battery module 100 can be improved, and thirdly, when the guide groove 20 is maintained, only the cover plate 16 needs to be disassembled, and the beam isolation plate does not need to be disassembled.
In the embodiment of the present invention, the cover plate 16 is an upper cover plate, the case 12 further includes a lower case 24, the top of the lower case 24 has an opening, and the cover plate 16 is connected to the top of the lower case 24 and closes the opening. In one embodiment, the cover 16 is removably coupled to the lower housing 24, which may facilitate handling and maintenance of the battery 14. The detachable connection mode can be a bolt connection mode, a buckle connection mode and the like. It will be appreciated that in other embodiments, the cover 16 may be non-removably coupled to the lower housing 24, as is not specifically limited herein.
The coaming of lower casing 24 still is equipped with air inlet 26, and air fan 28 is installed to the front bezel 27 of lower casing 24, and air fan 28 during operation is taken out the higher air of temperature in the box 12, and the lower air of external temperature can get into the box 12 inside through air inlet 26 to dispel the heat to battery 14, guarantees that battery 14 works at normal temperature range.
The plurality of cells 14 may be positioned within a receiving cavity defined by the lower housing 24 and the cover 16. The battery 14 may be a lithium ion battery 14, or other type of battery 14. The plurality of batteries 14 may be arranged in at least one battery row 30, and in the embodiment shown in fig. 2, the plurality of batteries 14 are arranged in two battery rows 30 in the front-rear direction of the battery module 100, and the two battery rows 30 are arranged in the left-right direction of the battery module 100. The plurality of cells 14 may be electrically connected in series, parallel, or series-parallel.
For example, all of the cells 14 may be electrically connected in series. Specifically, in the illustrated embodiment, all the cells 14 of one cell line 30 may be connected in series through an aluminum line, and two cells 14 located at the rearmost among the adjacent two cell lines 30 may be connected in series through an aluminum line. One end of the circuit formed by connecting all the batteries 14 in series may be connected to one connection terminal 32 of the front plate 27 of the battery module 100, and the other end is connected to the other connection terminal 32 of the front plate 27 of the battery module 100.
Each battery 14 also includes a battery housing having an opening at the top thereof, and a cap assembly attached to the top of the battery housing and closing the opening. The electric core is arranged in a space surrounded by the battery shell and the top cover assembly, and the top cover assembly further comprises a cover plate and a pole. The post and the explosion-proof valve 18 are mounted on the cover plate, and the post can be connected with the lug of the battery cell through a connecting piece. In the embodiment shown in fig. 2, the battery 14 is a prismatic battery 14. It is understood that the battery 14 may be a battery 14 of other shapes, such as a cylindrical battery 14, and is not particularly limited herein.
The explosion proof valve 18 is mounted on a cover plate, and the inner surface of the cover plate 16 is provided with at least one guide groove 20. In the embodiment shown in fig. 4, the guide groove 20 extends in the front-rear direction of the battery module 100, i.e., the length direction of the guide groove 20 is along the front-rear direction of the battery module 100, the guide groove 20 is disposed opposite to the explosion-proof valve 18, the notch 21 of the guide groove 20 is downward (refer to fig. 3), opposite to the explosion-proof valve 18, the arrangement direction of the plurality of battery rows 30 may be the front-rear direction of the battery module 100, the guide groove 20 includes a front end and a rear end, the front end of the guide groove 20 has the air outlet 22, and the rear end is closed. Thus, when the air pressure inside the battery 14 is greater than the set air pressure, the explosion-proof valve 18 is exhausted, and the exhausted air may enter the guide groove 20 and be guided from the air outlet 22 at the front end to the inside of the front plate 27 of the battery module 100. In one embodiment, the gas inside the front plate 27 may be drawn out by an exhaust fan 28. In one embodiment, the gas located inside the front plate 27 may be directly discharged from the front plate 27, avoiding the gas from being discharged from above the cover plate 16, while heating the upper battery module 100. In other embodiments, the front end of the guide groove 20 may be closed, the rear end may have the air outlet 22, or both the front end and the rear end of the guide groove 20 may have the air outlet 22. The at least one guide groove 20 may be one guide groove 20, may be two guide grooves 20, or may be more than two guide grooves 20.
In one embodiment, the arrangement direction of the batteries 14 may be the left-to-right direction of the battery module 100, and the guide groove 20 may extend in the left-to-right direction of the battery module, i.e., the length direction of the guide groove 20 may be the left-to-right direction of the battery module 100. The guide groove 20 has left and right ends, and may have an air outlet 22 at the left end and a closed right end, may have air outlets 22 at the left and right ends, and may have air outlets 22 at the left and right ends.
The direction of arrangement of the cells 14 is not limited to the above embodiment, but may be other directions, and the guide grooves 20 may extend in the direction of arrangement of the cells 30, and the relative positions of the guide grooves 20 and the explosion-proof valves 18 may be conveniently set.
In one embodiment, the cover 16 may be an injection-molded cover 16, so that the injection-molded cover 16 is light in weight, and more batteries 14 can be placed in the case 12 to increase the energy density of the battery module 100 compared to a metal cover with the same weight of the battery module 100.
In certain embodiments, referring to FIG. 5, the depth D of the guide groove 20 is selected from the range [5mm,20mm ], and the ratio of the groove width to the groove depth of the guide groove 20 is selected from the range [0.8,1.5].
Thus, the depth of the guide groove 20 is moderate and the size of the guide groove 20 is moderate.
Specifically, if the depth D of the guide groove 20 is less than 5mm (millimeters), it is easy to cause the gas to overflow from the guide groove 20 to a desired position when the gas is ejected from the explosion-proof valve 18 into the guide groove 20.
If the depth D of the guide groove 20 is greater than 20mm, the guide groove 20 occupies too much space of the battery module 100 in the height direction, so that the height of the battery module 100 is too large, or the height space for placing the battery 14 inside the battery module 100 is reduced, so that the battery 14 is shorter and the energy storage capacity of the battery module 100 is affected.
The depth D of the guide groove 20 is selected from the range [5mm,20mm ], so that a better balance can be achieved between preventing the gas from overflowing and reducing the space occupation of the guide groove 20 in height.
The depth D of the guide groove 20 is selected from the range [5mm,20mm ], that is, 5 mm.ltoreq.D.ltoreq.20 mm. In some examples, the depth D of the guide slot 20 may be 5mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, or other values between 5mm and 20mm.
If the ratio of the groove width to the groove depth of the guide groove 20 is less than 0.8, the groove width of the guide groove 20 may be small, the groove depth may be large, the groove width may be small, the covering effect of the guide groove 20 on the explosion-proof valve 18 may be poor, the groove depth may be large, the thickness of the cover plate 16 may be large, and the excessive vertical space of the battery module 100 may be occupied.
If the ratio of the groove width to the groove depth of the guide groove 20 is greater than 1.5, the guide groove 20 may have a large groove width and a small groove depth, the guide groove 20 may occupy an excessive horizontal space of the cover plate 16 and may also reduce the structural strength of the cover plate 16, and the groove depth may be small, which may cause gas ejected from the explosion-proof valve 18 to easily escape from the guide groove 20.
The ratio of the groove width to the groove depth of the guide groove 20 is selected from the range [0.8,1.5], so that a better balance can be achieved between ensuring the covering effect of the guide groove 20 on the explosion-proof valve 18, ensuring the structural strength of the cover plate 16, and reducing the space occupation of the guide groove 20 and the cover plate 16.
The ratio of the groove width to the groove depth of the guide groove 20 is R, which is selected from the range [0.8,1.5], that is, 0.8.ltoreq.R.ltoreq.1.5. In some examples, the ratio R may be 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, or other values between 0.8 and 1.5.
In one embodiment, the groove width may be determined using the ratio of the depth, the groove width, and the groove depth of the guide groove 20.
In certain embodiments, the depth D of the guide slot 20 is selected from the range [10mm,15mm ]. In this way, the depth of the guide groove 20 is more moderate.
The depth D of the guide groove 20 is selected from the range of 10mm,15mm, so that a better balance can be achieved between preventing the gas from overflowing and reducing the space occupation of the guide groove 20 in height.
The depth D of the guide groove 20 is selected from the range [10mm,15mm ], that is, 10 mm.ltoreq.D.ltoreq.15 mm. In some examples, the depth D of the guide slot 20 may be 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, or other values between 10mm and 15mm.
In some embodiments, the housing 12 includes a first plate and a second plate, with the guide slot 20 increasing in depth from the second plate toward the first plate and the air outlet 22 proximate the first plate. In this way, a slope can be created for the gas, allowing the gas to be better directed at the first plate.
Specifically, the first plate may be a front plate 27, the second plate may be a rear plate 29, and the depth of the guide groove 20 gradually increases from the rear plate 29 to the front plate 27, and the air outlet 22 is close to the front plate 27, so that the air ejected from the explosion-proof valve 18 can flow from the rear to the front plate 27 better, thereby facilitating the handling of the air.
Further, an exhaust fan 28 is installed at the front plate 27, and when the gas flows to the exhaust fan 28, the gas can be rapidly exhausted by the exhaust fan.
In certain embodiments, the slope of guide slot 20 relative to the horizontal is selected from the range [1 °,10 ° ]. In this way, the slope of the guide groove 20 is moderate.
Specifically, if the slope of the guide groove 20 with respect to the horizontal plane is less than 1 °, the effect of the slope formed by the guide groove 20 on the gas flow guiding is not significant. If the slope of the guide groove 20 with respect to the horizontal plane is greater than 10 °, the depth of one end of the guide groove 20 may be large, the cover plate 16 may be thick, and excessive space of the battery module may be occupied.
The slope of the guide groove 20 with respect to the horizontal plane is selected from the range of 1 deg., 10 deg., so that a better balance can be achieved between ensuring the flow guiding effect and reducing the space occupied by the cover plate 16 in the battery module.
The slope of the guide groove 20 with respect to the horizontal plane is T, which is selected from the range [1 DEG, 10 DEG ], that is, 1 DEG.ltoreq.T.ltoreq.10 deg. In some examples, the gradient T may be 1 °, 3 °, 5 °, 7 °, 9 °,10 °, or other values between 1 ° and 10 °.
The slope of the guide groove 20 with respect to the horizontal plane may be the slope of the guide groove 20 when the battery module 100 is laid on a horizontal support surface.
In some embodiments, referring to fig. 5, the width W of the notch 21 of the guide groove 20 is adapted to the width of the explosion proof valve 18 to be able to cover the explosion proof valve 18. In this way, the guide groove 20 can collect as much gas as possible that is discharged from the explosion-proof valve 18.
Specifically, the width W of the notch 21 of the guide groove 20 is adapted to the width of the explosion-proof valve 18 so as to be able to cover the explosion-proof valve 18, so that when the gas is discharged from the explosion-proof valve 18, the gas can enter the guide groove 20 from the notch 21 of the guide groove 20 as much as possible and be guided to a desired position or direction by the guide groove 20.
In one embodiment, the explosion-proof valve 18 has an oval shape, the explosion-proof valve 18 has a major axis width and a minor axis width, the major axis of the explosion-proof valve 18 is along the front-rear direction of the battery module 100, the minor axis is along the left-right direction of the battery module 100, the guide groove 20 is extended along the front-rear direction of the battery module 100, and the width W of the notch 21 of the guide groove 20 is not smaller than the minor axis width of the explosion-proof valve 18 to be able to cover the explosion-proof valve 18.
In one embodiment, the explosion-proof valve 18 is circular, the width of the explosion-proof valve 18 may be the diameter of the explosion-proof valve 18, the guiding groove 20 is opposite to the explosion-proof valve 18, the notch 21 of the guiding groove 20 is downward, and the width W of the notch 21 of the guiding groove 20 is not smaller than the width of the explosion-proof valve 18. In one embodiment, the guide slot 20 and the explosion proof valve 18 may be eccentrically disposed, with the width W of the notch 21 of the guide slot 20 sized to cover the explosion proof valve 18.
In some embodiments, the housing 12 includes a first plate and a second plate, and the slot opening width of the guide slot increases gradually from the second plate toward the first plate, with the air outlet 22 being adjacent to the first plate. In this way, the gas outlet 22 can be made to bleed out gas more quickly.
Specifically, the first plate may be a front plate 27, the second plate may be a rear plate 29, and the slot width of the guide groove 20 is gradually increased from the rear plate 29 to the front plate 27, and the gas outlet 22 is close to the front plate 27, so that the gas tends to diffuse from the rear to the front of the guide groove 20, and the gas outlet 22 discharges the gas more rapidly.
Further, an exhaust fan 28 is installed at the front plate 27, and when the gas flows to the exhaust fan 28, the gas can be rapidly exhausted by the exhaust fan.
In some embodiments, referring to fig. 4, a plurality of battery rows 30 are arranged in at least one battery row 30, one guide slot 20 is provided above each battery row 30, and the length L of the guide slot 20 is adapted to the length of the battery row 30 so as to be able to cover all of the explosion-proof valves 18 of one battery row 30. In this way, the number of guide grooves 20 can be reduced, simplifying the structure of the cover plate 16.
Specifically, in the embodiment shown in fig. 2 to 4, the plurality of battery rows 30 are arranged in two battery rows 30, the inner surface of the cap plate 16 is provided with two guide grooves 20 parallel to each other, and in one battery row 30, all the explosion-proof valves 18 are arranged in a straight line extending in the front-rear direction of the battery module 100. The length L of the guide groove 20 is adapted to the length of the battery row 30, and in one embodiment, the length L of the guide groove 20 is not less than the length of the battery row 30 corresponding to the guide groove 20, one guide groove 20 covers all of the explosion-proof valves 18 of the battery row 30, or the length L of the guide groove 20 is less than the length of the battery row 30 but the length L of the guide groove 20 enables the guide groove 20 to cover all of the explosion-proof valves 18 of the battery row 30.
In certain embodiments, the clearance between the guide groove 20 and the explosion proof valve 18 is 15mm or more and 40mm or less. In this way, the service life of the cover plate 16 can be prolonged.
Specifically, if the gap between the guide groove 20 and the explosion-proof valve 18 is smaller than 15mm, the velocity of the gas ejected from the explosion-proof valve 18 reaching the bottom surface of the guide groove may be high, and the temperature may be high, which may cause damage to the surface of the cover plate 16.
If the clearance between the guide groove 20 and the explosion-proof valve 18 is greater than 40mm, the overall thickness of the case 12 may be large.
The gap between the guide groove 20 and the explosion-proof valve 18 is larger than or equal to 15mm and smaller than or equal to 40mm, so that the gas sprayed by the explosion-proof valve 18 can be decelerated and cooled in a sufficient space before reaching the bottom surface of the guide groove 20, the damage of high-temperature high-speed gas to the surface of the cover plate 16 is reduced, the service life of the cover plate 16 is prolonged, and the thickness of the box body 12 is ensured to be moderate.
In some examples, the gap between the pilot groove 20 and the explosion proof valve 18 is 15mm, 17mm, 20mm, 25mm, 30mm, 35mm, 40mm, or other values between 15mm and 40mm.
In one embodiment, referring to fig. 3, the spacing between the guide groove 20 and the explosion proof valve 18 may be the gap between the notch 21 of the guide groove 20 and the explosion proof valve 18.
In some embodiments, the cross-section of the guide slot 20 is tapered in a direction away from the explosion proof valve 18. Thus, the collection and the discharge of the gas are facilitated.
Specifically, in a direction away from the explosion proof valve 18, it may be a bottom-up direction as shown in fig. 3. Referring to fig. 3, the notch 21 of the guide groove 20 faces downwards, the guide groove 20 is tapered from the notch 21 upwards, the notch 21 is wider, gas in a larger range can be introduced into the guide groove 20, collection of the gas is facilitated, the top of the guide groove 20 is narrower, the gas flows from the wider notch 21 to the top of the narrower guide groove 20, the flow speed can be increased in the guide groove 20, and the gas is discharged from the guide groove 20 more quickly.
In the illustrated embodiment, the guide slot 20 has a trapezoidal cross section. It is understood that the cross-section of the guide groove 20 is not limited to the above-described shape, and the cross-section of the guide groove 20 also includes, but is not limited to, rectangular, semicircular, semi-elliptical, profiled, etc.
In some embodiments, the inner channel surface 34 of the guide channel 20 is provided with an insulating layer (not shown). In this way, the upper battery module 100 can be prevented from being heated by the cover 16 having a high temperature.
Specifically, in one embodiment, when the battery module 100 is applied to electric equipment, two battery modules 100 are generally stacked in the height direction, the temperature of the gas discharged from the explosion-proof valve 18 is high, and when the gas is sprayed into the guide groove 20, heat can be transferred to the cover plate 16 as little as possible due to the blocking of the heat insulating layer, so that the cover plate 16 is prevented from being excessively high in temperature to heat the upper battery module 100. At the same time, the high temperature gas is prevented from melting the injection-molded cover plate 16.
In one example, the material of the insulating layer may be a ceramic rubber. It will be appreciated that in other examples, the insulating layer may be other materials, and is not limited to ceramic rubber.
The heat insulating layer may be provided at a portion of the guide groove 20 facing the inner groove surface 34 of the explosion-proof valve 18, the heat insulating layer may be provided over the entire inner groove surface 34 of the guide groove 20, or the heat insulating layer may be provided at other portions of the inner groove surface 34 of the guide groove 20.
In certain embodiments, the cover plate 16 comprises:
the plate body 36, the inner surface of the plate body 36 has guide slots 20;
a side plate 38 connecting the inner surface side of the plate body 36; and
reinforcing ribs 40 connect the side plates 38, the plate body 36 and the side walls of the guide groove 20. In this way, the structural strength and stability of the cover plate 16 can be improved.
Specifically, one end of the reinforcing rib 40 is connected with the side wall of the guide groove 20, the other end is connected with the inner surface of the side plate 38, and the top of the reinforcing rib 40 is connected with the inner surface of the upper body plate, so that the connection of the plate body 36, the guide groove 20 and the side plate 38 is reinforced, the structural strength and stability of the cover plate 16 are improved, and the cover plate 16 is not easy to deform.
In the embodiment shown in fig. 4, the plurality of reinforcing ribs 40 are uniformly spaced apart in the front-rear direction of the battery module 100, so that the structural strength and stability of the cover plate 16 can be balanced. However, the embodiment of the present invention is not limited to the arrangement of the reinforcing ribs 40 described above, and other arrangements of the reinforcing ribs 40 are also possible.
In some embodiments, the inner surface of the plate 36 is provided with a plurality of spaced apart guide slots 20, and the ribs 40 connect the sidewalls of adjacent guide slots 20. In this way, the structural strength and stability of the cover plate 16 are further improved.
Specifically, in the illustrated embodiment, the plurality of battery rows 30 are arranged into two battery rows 30, one guide groove 20 is disposed above each battery row 30, the guide grooves 20 extend along the front-rear direction of the battery module 100, two guide grooves 20 are disposed on the inner surface of the cover plate 16, the two guide grooves 20 are disposed in parallel, a plurality of reinforcing ribs 40 are disposed between the two guide grooves 20, the reinforcing ribs 40 are connected with the side walls of the adjacent two guide grooves 20, and the plurality of reinforcing ribs 40 are arranged at intervals along the front-rear direction of the battery module 100, so that the structural strength of the middle portion of the cover plate 16 is also enhanced, and the structural strength and stability of the cover plate 16 are further improved.
In certain embodiments, the inner surface of the plate body 36 is provided with a plurality of spaced apart guide grooves 20, the side plate 38 includes a front side plate 41, the front end of the guide groove 20 has the air outlet 22, the front side plate 41 is spaced apart from the front end of the guide groove 20 to form an air discharge passage 42, and the air discharge passage 42 communicates with all the air outlets 22. In this way, all the gas of the guide grooves 20 can be collected intensively, so that the exhaust of the battery module 100 is facilitated.
Specifically, in the embodiment shown in fig. 4, the inner surface of the cover plate 16 is provided with two guide grooves 20, the exhaust channel 42 is connected with two air outlets 22 of the two guide grooves 20, when the air is exhausted from the explosion-proof valve 18, the air can be guided to the air outlets 22 through the guide grooves 20 and then enter the exhaust channel 42 from the air outlets 22, the exhaust channel 42 extends along the left-right direction of the battery module 100, and the air exhausted by the explosion-proof valve 18 can be collected in the exhaust channel 42 and then can be collected and exhausted by the exhaust fan 28 of the front plate 27, so that the air of the battery module 100 is conveniently exhausted. The front plate 27 is provided with two exhaust fans 28 to accelerate the exhaust speed of the gas.
In other embodiments, the arrangement of the exhaust passage 42 is not limited to the arrangement described above, but may be other arrangements, and is not particularly limited herein.
In summary, the battery module 100 according to the embodiment of the invention can achieve at least the following technical effects:
1. the cover plate 16 is an injection molding cover plate, so that the weight is light, and the energy density of the battery module 100 is improved;
2. the guide groove 20 is added to prevent thermal diffusion and spread and improve the product safety;
3. the inner groove surface of the guide groove 20 is increased with a heat insulating layer, and gas is discharged from the front side of the battery module 100, thereby preventing the upper layer of the battery module 100 from being heated by the upward discharge of gas from the cover plate.
An electrical device according to an embodiment of the present invention includes the battery module 100 according to any one of the above embodiments.
In the above-mentioned consumer, the internal surface of apron 16 is equipped with guide slot 20, and when explosion-proof valve 18 was discharged, explosion-proof valve 18 exhaust gas can get into guide slot 20 to flow out via the gas outlet 22 of guide slot 20, the gas outlet 22 position of guide slot 20 can be set for, reduces the destruction of structure and the destruction of whole battery system when explosion-proof valve 18 was discharged, avoids causing personal safety injury.
Specifically, the electrical device may include one or more battery modules 100, and the plurality of battery modules 100 may be electrically connected in series, parallel, or series-parallel.
Powered devices include, but are not limited to, energy storage devices and vehicles. Referring to fig. 6, the energy storage device may be an energy storage container, where the energy storage container includes a container and a battery cluster 44 disposed in the container, the battery cluster 44 includes a cluster frame 46 and a plurality of battery modules 100, and the plurality of battery modules 100 are mounted on the cluster frame 46, for example, the plurality of battery modules 100 may be fixed on the cluster frame 46 in a row and column arrangement. The energy storage device may also be a household energy storage cabinet.
The battery module 100 may be applied to a vehicle as a power battery. Vehicles include, but are not limited to, electric-only vehicles, hybrid vehicles, range-extending electric vehicles, and the like.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (9)

1. A battery module, comprising:
the box, the box includes:
a cover plate;
a plurality of batteries located in the case, the batteries comprising:
a cap assembly including an explosion-proof valve;
the inner surface of the cover plate is provided with a guide groove extending along the arrangement direction of the batteries, the notch of the guide groove faces the explosion-proof valve, and at least one end of the guide groove is provided with an air outlet along the arrangement direction of the batteries;
the box body comprises a first plate and a second plate, the width of the notch of the guide groove gradually increases from the second plate to the first plate, and the air outlet is close to the first plate;
the depth of the guide groove gradually increases from the second plate to the first plate so that the guide groove has a slope with respect to a horizontal plane;
the batteries are arranged into at least one battery row, one side of each battery row is provided with one guide groove, and the length of the guide groove is adapted to the length of the battery row so as to be capable of covering all explosion-proof valves of one battery row;
the cover plate comprises a plate body and side plates, the guide grooves are formed in the inner surface of the plate body, and the side plates are connected with the side edges of the inner surface of the plate body;
the inner surface of the plate body is provided with a plurality of guide grooves at intervals, the side plates comprise front side plates, the front ends of the guide grooves are provided with air outlets, the front side plates are spaced from the front ends of the guide grooves to form air exhaust channels, and the air exhaust channels are communicated with all the air outlets.
2. The battery module according to claim 1, wherein the depth of the guide groove is selected from the range [5mm,20mm ], and the ratio of the groove width to the groove depth of the guide groove is selected from the range [0.8,1.5].
3. The battery module according to claim 1, wherein the slope of the guide groove with respect to the horizontal plane is selected from the range of [1 °,10 ° ].
4. The battery module according to claim 1, wherein a gap between the guide groove and the explosion-proof valve is 15mm or more and 40mm or less.
5. The battery module according to claim 1, wherein the guide groove has a tapered shape in a cross section in a direction away from the explosion-proof valve.
6. The battery module according to claim 1, wherein the inner groove surface of the guide groove is provided with a heat insulating layer.
7. The battery module according to claim 1, wherein the cover plate includes a reinforcing rib connecting the side plate, the plate body, and the side wall of the guide groove.
8. The battery module according to claim 7, wherein the inner surface of the plate body is provided with a plurality of spaced guide grooves, and the reinforcing ribs connect the side walls of the adjacent two guide grooves.
9. A powered device comprising a battery module according to any one of claims 1-8.
CN202211350826.1A 2022-10-31 2022-10-31 Battery module and electric equipment Active CN115602994B (en)

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CN116454526B (en) * 2023-06-14 2023-08-29 深圳海辰储能控制技术有限公司 Energy storage device, power utilization system and energy storage system

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