CN115602994A - Battery module and consumer - Google Patents

Battery module and consumer Download PDF

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Publication number
CN115602994A
CN115602994A CN202211350826.1A CN202211350826A CN115602994A CN 115602994 A CN115602994 A CN 115602994A CN 202211350826 A CN202211350826 A CN 202211350826A CN 115602994 A CN115602994 A CN 115602994A
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CN
China
Prior art keywords
guide groove
battery module
plate
explosion
proof valve
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Granted
Application number
CN202211350826.1A
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Chinese (zh)
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CN115602994B (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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Publication of CN115602994B publication Critical patent/CN115602994B/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/35—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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

The invention discloses a battery module and electric equipment. The battery module comprises a box body and a plurality of batteries, wherein the box body comprises a cover plate; the battery pack comprises a cover plate assembly, wherein the cover plate assembly comprises an explosion-proof valve, guide grooves extending along the arrangement directions of the batteries are formed in the inner surface of the cover plate, notches of the guide grooves face the explosion-proof valve, the guide grooves are arranged along the arrangement directions of the batteries, and at least one end of each guide groove is provided with an air outlet. Among the above-mentioned battery module, the internal surface of apron is equipped with the guide way, and when explosion-proof valve was carminative, the explosion-proof valve combustion gas can get into the guide way to flow via the gas vent of guide way, the gas vent position of guide way can be set for, to structural damage and whole battery system's destruction when reducing explosion-proof valve and exhausting, avoid causing the personal safety injury.

Description

Battery module and consumer
Technical Field
The invention relates to the technical field of batteries, in particular to a battery module and electric equipment.
Background
Among the prior art, the battery module can appear the unstability phenomenon at the charge-discharge in-process and lead to the outside explosion-proof valve of battery cell to spout high-temperature high-pressure gas, and at present, the battery module corresponds every battery at the apron and directly sets up the exhaust hole and come the high-temperature high-pressure gas of discharge, and the direction that gaseous outside sprays is perpendicular with the module apron, very easily arouses the destruction of structural damage and whole battery system, causes the personal safety injury.
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:
a case, the case comprising:
a cover plate;
a plurality of batteries located within 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.
Among the above-mentioned battery module, the internal surface of apron is equipped with the guide way, and when explosion-proof valve exhaust, the explosion-proof valve exhaust gas can get into the guide way to flow via the gas vent of guide way, the gas vent position of guide way can be set for, to structural damage and whole battery system's destruction when reducing explosion-proof valve exhaust, avoids causing the personal safety injury.
In certain embodiments, 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].
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 horizontal is selected from the range [1 °,10 ° ].
Thus, the slope of the guide groove is moderate.
In some embodiments, the box body includes a first plate and a second plate, the width of the notch of the guide groove gradually increases from the second plate toward the first plate, and the air outlet is adjacent to the first plate.
In this way, the gas outlet can be made to vent 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 of the cell rows, and the length of the guide groove is adapted to the length of the cell row so as to cover all the explosion-proof valves of one of the cell rows.
Therefore, the number of the guide grooves can be reduced, and the structure of the cover plate is simplified.
In some embodiments, a gap between the guide groove and the explosion-proof valve is 15mm or more and 40mm or less.
Therefore, the service life of the cover plate can be prolonged.
In certain embodiments, the guide groove has a cross-section that tapers away from the explosion proof valve.
In this way, collection and discharge of gases is facilitated.
In some embodiments, the inner groove surface of the guide groove is provided with a heat insulating layer.
Therefore, the cover plate can be prevented from being heated due to high temperature.
In some embodiments, the cover plate comprises:
the inner surface of the plate body is provided with the guide groove;
the side plate is connected with the side edge of the inner surface of the plate body; and
and the reinforcing ribs are connected with the side plates, the plate bodies and the side walls of the guide grooves.
So, can promote the structural strength and the stability of apron.
In some embodiments, the inner surface of the plate body is provided with a plurality of spaced guide grooves, and the reinforcing rib connects the side walls of two adjacent guide grooves.
Thus, 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 includes a front side plate, the front ends of the guide grooves have the air outlets, and the front side plate is spaced from the front ends of the guide grooves to form an air discharge passage, and the air discharge passage communicates with all the air outlets.
So, can concentrate the collection with the gas of all guide ways, the exhaust of the battery module of being convenient for.
The battery module according to the embodiment of the present invention includes any one of the above embodiments.
Among the above-mentioned consumer, the internal surface of apron is equipped with the guide way, and when explosion-proof valve exhausts, the explosion-proof valve combustion gas can get into the guide way to flow via the gas vent of guide way, the gas vent position of guide way can be set for, to structural damage and whole battery system's destruction when reducing explosion-proof valve exhaust, avoids causing the 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 present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained according to the structures shown in the drawings without creative efforts for those 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 of an embodiment of the present invention;
fig. 6 is a structural view of a battery cluster according to an embodiment of the present invention.
Description of reference numerals:
the battery pack comprises a battery module-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
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to 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", and the like, indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations 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 batteries 14 are located within the housing 12, the batteries 14 including a 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 direction of the row of the plurality of batteries 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 along the direction of the row of the plurality of batteries 30 is provided with an air outlet 22.
In the above-mentioned battery module 100, the inner surface of the cover plate 16 is provided with the guide groove 20, 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, and the position of the gas outlet 22 of the guide groove 20 can be set, so that the structural damage and the damage to the whole battery system when the explosion-proof valve 18 exhausts are reduced, and the personal safety injury is avoided. In addition, the increase of the guide groove 20 can prevent heat diffusion spreading and improve product safety.
Specifically, the battery module 100 of the embodiment of the present invention is a battery module with a wireless beam isolation plate structure, and compared with the case where the guide groove is formed on the wire harness isolation plate, in the battery module 100 of the embodiment of the present invention, the guide groove 20 is formed on the inner surface of the cover plate 16, firstly, the wire harness isolation plate material 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 detached, and the wire harness isolation plate does not need to be detached further.
In the embodiment of the present invention, the cover 16 is an upper cover, the box 12 further includes a lower housing 24, the top of the lower housing 24 has an opening, and the cover 16 is connected to the top of the lower housing 24 and closes the opening. In one embodiment, cover 16 is removably attached to lower housing 24 so that the handling and maintenance of battery 14 may be facilitated. The detachable connection mode can be bolt connection, snap connection and the like. It is understood that in other embodiments, the cover 16 may be non-removably attached to the lower housing 24, and is not particularly limited herein.
The enclosure of the lower shell 24 is further provided with an air inlet 26, an exhaust fan 28 is installed on a front plate 27 of the lower shell 24, when the exhaust fan 28 works, air with high temperature in the box body 12 is extracted, and air with low external temperature can enter the box body 12 through the air inlet 26 to dissipate heat of the battery 14, so that the battery 14 can work in a normal temperature range.
A plurality of batteries 14 may be positioned within a receiving cavity defined by lower housing 24 and 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 both.
For example, all of the cells 14 may be electrically connected in series. Specifically, in the illustrated embodiment, all of the cells 14 of one cell row 30 may be connected in series by an aluminum row, and of the adjacent two cell rows 30, the two cells 14 located at the rearmost are connected in series by an aluminum row. The circuit formed by all the cells 14 connected in series may have one end connected to one connection terminal 32 of the front plate 27 of the battery module 100 and the other end connected to the other connection terminal 32 of the front plate 27 of the battery module 100.
Each battery 14 also includes a battery case having an opening at the top and a cell core, and a top cap assembly attached to the top of the battery case and closing the opening. The battery cell is positioned in a space enclosed by the battery case and the top cover assembly, and the top cover assembly further comprises a cover plate and a pole. The pole and the explosion-proof valve 18 are arranged on the cover plate, and the pole can be connected with the pole ear 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 other shapes of the battery 14, such as a cylindrical battery 14, and is not limited in particular.
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, that is, the length direction of the guide groove 20 is in 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 faces downward (see fig. 3) opposite to the explosion-proof valve 18, the plurality of battery rows 30 may be arranged in 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. When the air pressure inside the battery 14 is higher than the set air pressure, the explosion-proof valve 18 discharges the air, and the discharged air enters the guide groove 20 and is 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 located inside the front plate 27 may be extracted by an exhaust fan 28. In one embodiment, the gas inside the front plate 27 may be directly exhausted from the front plate 27, preventing the gas from being exhausted above the cap plate 16 to heat the upper battery module 100. In other embodiments, the front end of the guide groove 20 may be closed and 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, two guide grooves 20, or 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 electrical 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 the air outlet 22 at the left end and the right end closed, or both the left and right ends may have the air outlet 22.
The arrangement direction of the batteries 14 is not limited to the above embodiment, and may be another direction, and the guide groove 20 extends in the direction of the row of batteries 30, and the relative position of the guide groove 20 and the explosion-proof valve 18 may be conveniently set.
In one embodiment, the cover 16 may be an injection molded cover 16, which is integrally injection molded, 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 for 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 (millimeter), the gas easily overflows 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 short 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 of [5mm,20mm ], so that a preferable balance can be achieved between prevention of gas overflow and reduction of the space occupation of the guide groove 20 in height.
The depth D of the guide groove 20 is selected from the range of [5mm,20mm ], that is, D is 5mm or more and is less than or equal to 20mm. In some examples, the depth D of the guide groove 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 cause the cover effect of the guide groove 20 on the explosion-proof valve 18 to be poor, the groove depth may be large, the thickness of the cover plate 16 may be large, and the battery module 100 occupies too much vertical space.
If the ratio of the groove width to the groove depth of the guide groove 20 is greater than 1.5, a larger groove width and a smaller groove depth of the guide groove 20 may result, 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 result in a gas ejected from the explosion-proof valve 18 being liable to 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 preferable balance can be obtained 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], i.e., R 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 depth of the guide groove 20, the ratio of the groove width to the groove depth.
In certain embodiments, the depth D of the guide groove 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 [10mm,15mm ], and a better balance can be achieved between prevention of gas overflow and reduction of 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 groove 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, the depth of the guide slot 20 gradually increasing from the second plate to the first plate, and the air outlet 22 is adjacent to the first plate. Thus, a gradient can be created for the gas, allowing the gas to be better directed to the first plate.
Specifically, the first plate may be a front plate 27, the second plate may be a rear plate 29, 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 gas ejected from the explosion-proof valve 18 can better flow from the rear to the front plate 27, and the gas treatment is facilitated.
Further, an exhaust fan 28 is installed at the front plate 27, and when the air flows to the exhaust fan 28, the air can be rapidly exhausted by the exhaust fan.
In certain embodiments, the slope of the guide slot 20 relative to 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 guiding is insignificant. If the slope of the guide groove 20 with respect to the horizontal plane is greater than 10 °, it may result in a greater depth of one end of the guide groove 20 and a thicker cover plate 16, which takes up too much space of the battery module.
The slope of the guide slots 20 relative to the horizontal is selected from the range of 1, 10 degrees, which provides a better balance between ensuring the flow guide and reducing the cover plate 16 from occupying the battery module space.
The slope of the guide groove 20 relative to the horizontal plane is T, which is selected from the range [1 DEG, 10 DEG ], i.e., 1 DEG-T-10 deg. In some examples, the slope 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 the horizontal support plane.
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 so as to be able to cover the explosion-proof valve 18. In this way, the guide groove 20 can collect as much gas as possible 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, and it is possible to make the gas enter into 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 when the gas is discharged from the explosion-proof valve 18.
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 extends 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 less than the minor axis width of the explosion-proof valve 18 so as 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 can be the diameter of the explosion-proof valve 18, the guide groove 20 is opposite to the explosion-proof valve 18, the notch 21 of the guide groove 20 faces downwards, and the width W of the notch 21 of the guide groove 20 is not less than the width of the explosion-proof valve 18. In one embodiment, the guide groove 20 and the explosion-proof valve 18 may be eccentrically disposed, and the width W of the notch 21 of the guide groove 20 is sized to cover the explosion-proof valve 18.
In some embodiments, the housing 12 includes a first plate and a second plate, the width of the slot of the guide slot increases from the second plate toward the first plate, and the air outlet 22 is adjacent to the first plate. In this manner, the gas outlet 22 can be made to vent gas more quickly.
Specifically, the first plate may be a front plate 27, the second plate may be a rear plate 29, the width of the notch 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 tends to diffuse from the rear to the front of the guide groove 20, so that the air outlet 22 leaks out of the air more quickly.
Further, an exhaust fan 28 is installed at the front plate 27, and when the air flows to the exhaust fan 28, the air can be rapidly exhausted by the exhaust fan.
In some embodiments, referring to fig. 4, a plurality of battery rows 30 are arranged into at least one battery row 30, a guide groove 20 is provided above each battery row 30, and the length L of the guide groove 20 is adapted to the length of the battery row 30 so as to cover all the explosion-proof valves 18 of one battery row 30. Thus, the number of guide grooves 20 can be reduced, and the structure of the cover plate 16 can be simplified.
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 along a 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, 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 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 is such that the guide groove 20 can cover all the explosion-proof valves 18 of the battery row 30.
In some embodiments, the clearance between the guide groove 20 and the explosion-proof valve 18 is 15mm or more and 40mm or less. In this manner, the service life of the cover plate 16 can be extended.
Specifically, if the clearance between the guide groove 20 and the explosion-proof valve 18 is less than 15mm, the velocity of the gas ejected from the explosion-proof valve 18 when reaching the bottom surface of the guide groove may be high, the temperature may be high, and the surface of the cover plate 16 may be easily damaged.
If the clearance between the guide groove 20 and the explosion-proof valve 18 is more than 40mm, it may result in a large overall thickness of the tank body 12.
The clearance between the guide groove 20 and the explosion-proof valve 18 is more than or equal to 15mm and less 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 the high-temperature and 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 clearance between the guide 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 interval between the guide groove 20 and the explosion-proof valve 18 may be a gap between the notch 21 of the guide groove 20 and the explosion-proof valve 18.
In certain embodiments, the guide groove 20 has a cross-section that tapers in a direction away from the explosion-proof valve 18. In this way, collection and discharge of gas is facilitated.
Specifically, in the direction away from the explosion-proof valve 18, the direction may be from bottom to top as shown in fig. 3. Referring to fig. 3, the notch 21 of the guide groove 20 faces downward, the guide groove 20 is tapered upward from the notch 21, the notch 21 is wider, and the gas in a larger range can be introduced into the guide groove 20, so that the gas can be collected conveniently, the top of the guide groove 20 is narrower, the gas flows from the wider notch 21 to the narrower top of the guide groove 20, and the flow rate of the gas in the guide groove 20 can be increased, so that the gas can be discharged from the guide groove 20 more quickly.
In the illustrated embodiment, the guide groove 20 has a trapezoidal cross-section. It is to be 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, a rectangle, a semicircle, a semi-ellipse, a profile, and the like.
In some embodiments, the inner groove surface 34 of the guide groove 20 is provided with a thermal insulation layer (not shown). Thus, the upper battery module 100 can be prevented from being heated due to the high temperature of the cap plate 16.
Specifically, in one embodiment, when the battery module 100 is applied to an electric device, 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 obstruction of the heat-insulating layer, thereby preventing the cover plate 16 from being heated by the high temperature to heat the upper battery module 100. At the same time, it is also possible to prevent the injection-molded cover plate 16 from being melted by the high-temperature gas.
In one example, the material of the thermal insulation layer may be ceramic rubber. It is understood that in other examples, the thermal insulation layer may be made of 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 entire inner groove surface 34 of the guide groove 20 may be provided with the heat insulating layer, or the heat insulating layer may be provided at another portion of the inner groove surface 34 of the guide groove 20.
In certain embodiments, the cover 16 includes:
a plate body 36, wherein the inner surface of the plate body 36 is provided with a guide groove 20;
a side plate 38 connected to the inner surface side of the plate body 36; and
and the reinforcing ribs 40 are used for connecting the side plates 38, the plate body 36 and the side walls of the guide grooves 20. In this manner, the structural strength and stability of the cover plate 16 may be improved.
Specifically, the lateral wall of guide way 20 is connected to the one end of strengthening rib 40, and the internal surface of curb plate 38 is connected to the other end, and the internal surface of upper plate is connected to the top of strengthening rib 40 for the connection of plate body 36, guide way 20 and curb plate 38 is strengthened, has promoted the structural strength and the stability of apron 16, and apron 16 is difficult to deform.
In the embodiment shown in fig. 4, the plurality of reinforcing ribs 40 are uniformly spaced in the front-rear direction of the battery module 100, so that the structural strength and stability of the cap plate 16 are balanced throughout. However, the embodiment of the present invention is not limited to the arrangement of the ribs 40 described above, and other arrangements of the ribs 40 may be possible.
In certain embodiments, the inner surface of the plate body 36 is provided with a plurality of spaced guide grooves 20, and the ribs 40 connect the side walls of two adjacent guide grooves 20. In this manner, the structural strength and stability of the cover 16 is further enhanced.
Specifically, in the illustrated embodiment, the plurality of battery rows 30 are arranged in two battery rows 30, one guide groove 20 is disposed above each battery row 30, the guide grooves 20 extend in 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 connect the side walls of the two adjacent guide grooves 20, and the plurality of reinforcing ribs 40 are spaced apart from each other in 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 some embodiments, the inner surface of the plate body 36 is provided with a plurality of spaced guide grooves 20, the side plate 38 includes a front side plate 41, the front ends of the guide grooves 20 have the air outlets 22, the front side plate 41 is spaced from the front ends of the guide grooves 20 to form an air discharge passage 42, and the air discharge passage 42 communicates with all the air outlets 22. In this way, the gas in all the guide grooves 20 can be collected in a concentrated manner, facilitating the exhaust of the battery module 100.
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 connects the two air outlets 22 of the two guide grooves 20, when the gas is exhausted from the explosion-proof valve 18, the gas 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 and right direction of the battery module 100, and the gas exhausted from the explosion-proof valve 18 can be collected in the exhaust channel 42 and then can be exhausted by the exhaust fan 28 of the front plate 27, so that the exhaust of the battery module 100 is facilitated. Two exhaust fans 28 are disposed on the front plate 27 to increase the exhaust rate of the gas.
In other embodiments, the arrangement of the exhaust passage 42 is not limited to the above arrangement, and may be another arrangement, which is not specifically limited herein.
In summary, the battery module 100 according to the embodiment of the invention can at least achieve 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 heat diffusion spreading and improve product safety;
3. the heat insulating layer is added to the inner groove surface of the guide groove 20, and gas is discharged from the front side of the battery module 100, thereby preventing the upper battery module 100 from being heated by the gas discharged upward from the cover plate.
An electric device according to an embodiment of the present invention includes the battery module 100 according to any one of the above embodiments.
In the electric equipment, the inner surface of the cover plate 16 is provided with the guide groove 20, when the explosion-proof valve 18 exhausts, the gas exhausted by the explosion-proof valve 18 can enter the guide groove 20 and flow out through the gas outlet 22 of the guide groove 20, and the position of the gas outlet 22 of the guide groove 20 can be set, so that the structural damage and the damage to the whole battery system when the explosion-proof valve 18 exhausts are reduced, and the personal safety injury is avoided.
Specifically, the electric device may include one or more battery modules 100, and the plurality of battery modules 100 may be electrically connected in series, in parallel, or in series-parallel.
The 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, 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, 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-column arrangement manner. The energy storage device may also be a domestic 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 vehicles, hybrid vehicles, extended range electric vehicles, and the like.
In the description of the present specification, reference to the description of "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" or the like 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 embodiment or example. 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: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (12)

1. A battery module, comprising:
a case, the case comprising:
a cover plate;
a plurality of batteries located within 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.
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 [1 °,10 ° ].
4. The battery module according to claim 1, wherein the case includes a first plate and a second plate, the width of the groove opening of the guide groove gradually increases from the second plate toward the first plate, and the air outlet is adjacent to the first plate.
5. The battery module according to claim 1, wherein the plurality of batteries are arranged in at least one battery row, one guide groove is provided at one side of each battery row, and the length of the guide groove is adapted to the length of the battery row so as to cover all explosion-proof valves of one battery row.
6. 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.
7. The battery module according to claim 1, wherein the guide groove has a cross section that is tapered in a direction away from the explosion-proof valve.
8. The battery module according to claim 1, wherein the inner groove surface of the guide groove is provided with a heat insulating layer.
9. The battery module according to claim 1, wherein the cap plate comprises:
the inner surface of the plate body is provided with the guide groove;
the side plate is connected with the side edge 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.
10. The battery module according to claim 9, wherein the inner surface of the plate body is provided with a plurality of the guide grooves at intervals, and the reinforcing ribs connect the sidewalls of adjacent two of the guide grooves.
11. The battery module according to claim 9, wherein the inner surface of the plate body is provided with a plurality of the guide grooves at intervals, the side plate includes a front side plate, the front ends of the guide grooves have the air outlets, and the front side plate is spaced from the front ends of the guide grooves to form an air discharge passage, and the air discharge passage communicates with all the air outlets.
12. An electric device comprising the battery module according to any one of claims 1 to 11.
CN202211350826.1A 2022-10-31 2022-10-31 Battery module and electric equipment Active CN115602994B (en)

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