CN115548551B - Battery pack - Google Patents
Battery pack Download PDFInfo
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- CN115548551B CN115548551B CN202211528352.5A CN202211528352A CN115548551B CN 115548551 B CN115548551 B CN 115548551B CN 202211528352 A CN202211528352 A CN 202211528352A CN 115548551 B CN115548551 B CN 115548551B
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- Prior art keywords
- battery
- battery pack
- assembly
- pack according
- end plate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention relates to the technical field of batteries, and provides a battery pack, which comprises: a battery case; the first battery assembly is arranged in the battery box body and comprises a plurality of first batteries stacked along a first direction; the limiting part is arranged in the battery box body, the first battery assembly and the limiting part are arranged along the second direction, so that the limiting part is in contact with a first battery at the end of the first battery assembly, the first direction is basically vertical to the second direction, the limiting part extends along the third direction, wherein the length occupied by the limiting part is not more than the length occupied by the two first batteries along the first direction, the space occupied by the limiting part cannot be too large, the problem that the weight of the limiting part is too large is avoided, and the whole weight of the battery pack is reduced. The limiting part can limit the stacking of the first battery pack, and the weight of the battery pack is not excessively increased, so that the assembly efficiency of the battery pack is improved.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery pack.
Background
In the related art, a battery case is used to accommodate a battery assembly formed by a plurality of batteries, so as to protect the batteries. In the process of putting the battery pack into the battery box body, the battery pack is not easy to position due to the limitation of the internal space of the battery box body.
Disclosure of Invention
The invention provides a battery pack, which is used for improving the assembly efficiency of the battery pack.
The present invention provides a battery pack, including:
a battery case;
the first battery assembly is arranged in the battery box body and comprises a plurality of first batteries stacked along a first direction;
the limiting piece is arranged in the battery box body, the first battery component and the limiting piece are arranged along a second direction so that the limiting piece is in contact with a first battery at the end part of the first battery component, the first direction is basically vertical to the second direction, the limiting piece extends along a third direction, the third direction is basically vertical to the first direction, the third direction is basically vertical to the second direction, and the third direction is vertical to the bottom surface of the battery box body;
and in the first direction, the length occupied by the limiting piece is not more than the length occupied by the two first batteries.
The battery pack provided by the embodiment of the invention comprises a battery box body, a first battery component and a limiting piece, wherein the first battery component and the limiting piece are arranged in the battery box body. Through being provided with the locating part in the battery box, thereby when first battery pack piles up, the locating part can realize that the first battery to first battery pack carries on spacingly, with this make things convenient for piling up of first battery pack, thereby the efficiency of first battery pack into the battery box has been improved, and the length that the locating part occupied is not more than the length that two first batteries occupied, the space that the locating part occupied promptly can not be too big, thereby avoid appearing the too big problem of locating part weight, with this whole weight that reduces the battery package. The limiting part can limit the stacking of the first battery pack, and the weight of the battery pack is not excessively increased, so that the assembly efficiency of the battery pack is improved.
Drawings
For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted so as to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:
fig. 1 is a partial schematic structural view of a battery pack according to an exemplary embodiment;
fig. 2 is a partial schematic structural view of a perspective of a battery pack according to an exemplary embodiment;
fig. 3 is a partial structural view illustrating a viewing angle of a battery pack according to an exemplary embodiment;
fig. 4 is a partial schematic structural view of a battery pack according to an exemplary embodiment;
FIG. 5 is a schematic diagram illustrating the construction of a portion of a battery pack, according to an exemplary embodiment;
FIG. 6 is a schematic diagram of another portion of a battery pack according to an exemplary embodiment;
FIG. 7 is a schematic diagram illustrating the internal portion of a battery pack according to an exemplary embodiment;
fig. 8 is a schematic diagram illustrating a structure of a battery cluster according to an exemplary embodiment.
The reference numerals are explained below:
1. a frame; 2. a battery pack; 10. a battery case; 11. a base plate; 12. a first end plate; 13. a second end plate; 14. a vent hole; 15. a cover plate; 20. a first battery assembly; 21. a first battery; 22. a first flow passage; 30. a second battery assembly; 31. a second battery; 32. a second flow passage; 40. a ventilation flow passage; 50. a stop structure; 60. Fixing the end plate; 70. a limiting member; 71. accommodating grooves; 72. a vent; 80. a fixed beam; 90. a support beam; 100. a fan.
Detailed Description
The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.
In the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.
The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.
Further, in the description of the present disclosure, it should be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.
An embodiment of the present invention provides a battery pack, referring to fig. 1 to 7, the battery pack includes: a battery case 10; a first battery pack 20, the first battery pack 20 being disposed in the battery case 10, the first battery pack 20 including a plurality of first batteries 21 stacked in a first direction; the limiting member 70, the limiting member 70 is disposed in the battery box 10, the first battery assembly 20 and the limiting member 70 are disposed along a second direction, so that the limiting member 70 contacts with the first battery 21 at the end of the first battery assembly 20, the first direction is substantially perpendicular to the second direction, the limiting member 70 extends along a third direction, the third direction is substantially perpendicular to the first direction, the third direction is substantially perpendicular to the second direction, and the third direction is perpendicular to the bottom surface of the battery box 10; wherein, in the first direction, the limiting member 70 occupies a length no greater than the length occupied by the two first batteries 21.
The battery pack according to an embodiment of the present invention includes a battery case 10, a first battery assembly 20, and a limiting member 70, wherein the first battery assembly 20 and the limiting member 70 are disposed in the battery case 10. Through being provided with the locating part 70 in the battery box 10 to when first battery pack 20 piles up, the locating part 70 can realize spacing to first battery 21 of first battery pack 20 to this makes things convenient for the piling up of first battery pack 20, thereby has improved the efficiency that first battery pack 20 packed into battery box 10, and the length that the locating part 70 occupy is not more than the length that two first batteries 21 occupy, the space that the locating part 70 occupied can not too big promptly, thereby avoid appearing the too big problem of locating part 70 weight, with this whole weight that reduces the battery package. The stopper 70 not only can realize the stacking stopper of the first battery pack 20, but also does not increase the weight of the battery pack too much, thereby improving the assembly efficiency of the battery pack.
It should be noted that the plurality of first batteries 21 of the first battery assembly 20 can be independently installed in the battery box 10, that is, the plurality of first batteries 21 can be installed in the battery box 10 one by one, when the first battery 21 is installed, the first battery 21 can be in limit contact with the limiting member 70, so that the first battery 21 is positioned, and a positioning reference is provided for the subsequent stacking of each first battery 21, so that the stacking efficiency of each subsequent first battery 21 can be improved. Or, first battery pack 20 can fix a plurality of first batteries 21 through end plate and curb plate, has formed the battery module, and the battery module can once only be packed into in battery box 10, and at this moment, locating part 70 can contact by the first battery 21 of battery module tip to this has realized the quick location to the battery module, thereby has improved the assembly efficiency of battery module.
As shown in fig. 6, the first battery assembly 20 includes a plurality of first batteries 21 stacked in a first direction, the first battery assembly 20 and the limiting member 70 are disposed in a second direction, and the limiting member 70 extends in a third direction, where the first direction is denoted by a, the second direction is denoted by B, the third direction is denoted by C, the first direction may be a length direction of the battery case 10, the second direction may be a width direction of the battery case 10, and the third direction may be a height direction of the battery case 10. The limiting member 70 is at least in contact with the end first cell 21 of the first cell assembly 20, that is, at least limiting the first stacked first cell 21 can be achieved, so as to improve the stacking efficiency of the first cell assembly 20.
In the first direction, the length occupied by the limiting member 70 is not greater than the length occupied by two first batteries 21, that is, the limiting member 70 may make limiting contact with at most two first batteries 21, or the limiting member 70 may make limiting contact with at most three first batteries 21, for example, the middle portion of the limiting member 70 makes limiting contact with one first battery 21, and the opposite sides of the limiting member 70 may make limiting contact with the other two first batteries 21. The size of the limiting member 70 is limited, so that the problem that the limiting member 70 is too large to affect the internal space layout of the battery pack and the problem that the weight of the limiting member 70 is too large can be avoided on the basis of realizing positioning.
In one embodiment, along the first direction, the length occupied by the limiting member 70 is not greater than the length occupied by one first battery 21, that is, the limiting member 70 may make limiting contact with at most one first battery 21, or the limiting member 70 may make limiting contact with at most two first batteries 21, and the limiting member 70 may not occupy an excessive space inside the battery box 10 based on the positioning.
The limiting member 70 may be disposed close to the inner wall of the battery box 10, for example, the limiting member 70 and the surface of the first battery 21 facing the inner wall of the battery box 10 are flush, and at this time, the limiting member 70 may form a limiting contact with at most one first battery 21. Alternatively, the surfaces of the limiting member 70 and the first batteries 21 facing the inner wall of the battery box 10 may not be flush, and the distance between the surface of the limiting member 70 and the surface of the inner wall of the battery box 10 is greater than the distance between the surface of the first battery 21 and the surface of the inner wall of the battery box 10, and at most, the limiting member 70 may be in limiting contact with two first batteries 21.
In the above embodiment, the limiting member 70 may contact at least the first cell 21 at the end of the first cell assembly 20, so that when the first cell assembly 20 is stacked, at least the first cell 21 which is stacked at the beginning may be limited, which is used as a reference for stacking other subsequent first cells 21, thereby improving the assembly efficiency of the first cell assembly 20.
In one embodiment, the stopper 70 occupies a length not greater than half of the length occupied by the first battery 21 in the first direction, thereby reducing the size of the stopper 70 and maximizing the use of the space inside the battery case 10, for example, the space opposite to the stopper 70 in the first direction may be used as a heat dissipation space.
In one embodiment, along the third direction, the height of the limiting member 70 is not greater than the height of the first battery 21, so that the limiting member 70 can limit the first battery 21, and at the same time, the limiting member 70 can be prevented from being too high to increase the height space occupancy of the battery pack, and the limiting member 70 can be prevented from being too large to contact with the first battery 21 to damage the first battery 21.
In one embodiment, the length occupied by the limiting member 70 is not greater than half of the length occupied by the first battery 21 in the first direction, and the height of the limiting member 70 is not greater than the height of the first battery 21 in the third direction, that is, the space occupied by the limiting member 70 is relatively small, but the limitation on the first battery 21 at the end can be realized. In the third direction, the top end of the stopper 70 is not disposed beyond the top end of the first cell 21.
In one embodiment, as shown in fig. 6, the battery pack further includes a fixing beam 80, the fixing beam 80 is disposed on the battery box 10, the fixing beam 80 extends along the first direction, so that the fixing beam 80 contacts with the first battery assembly 20, that is, the fixing beam 80 can also limit and fix the first battery assembly 20, thereby ensuring that the first battery assembly 20 can be stably installed in the battery box 10, thereby avoiding the problem of shaking and the like of the first battery assembly 20, and the fixing beam 80 can also limit the stacking of the first battery assembly 20.
In one embodiment, as shown in fig. 6, the limiting member 70 is connected to the fixing beam 80, and along the third direction, the height of the fixing beam 80 is smaller than the height of the first battery 21, that is, the top end of the fixing beam 80 is not beyond the top end of the first battery 21, so as to avoid the fixing beam 80 occupying too large height space, and ensure that the top end of the limiting member 70 is not beyond the top end of the first battery 21.
The limiting member 70 may be connected to the top end of the fixing beam 80, and the top end of the limiting member 70 is not beyond the top end of the first battery 21, so that the sum of the heights of the limiting member 70 and the fixing beam 80 is not greater than the height of the first battery 21, thereby ensuring that the space on the fixing beam 80 may be a reserved space, for example, may be used as a heat dissipation space.
In some embodiments, it is not excluded that the retaining member 70 may be attached to an end of the fixed beam 80, and the end of the fixed beam 80 may be flush with the top end of the first battery 21.
In one embodiment, the fixing beams 80 are disposed on the bottom surface of the battery case 10, so that the fixing beams 80 can be stably connected to the battery case 10, and can provide reinforcement to the bottom surface of the battery case 10 to prevent the bottom surface of the battery case 10 from being deformed and damaged when the bottom surface of the battery case 10 is impacted by external force.
In some embodiments, it is not excluded that the bottom of the fixing beam 80 may be spaced apart from the bottom surface of the battery box 10, i.e., the fixing beam 80 may be suspended to the side surface of the battery box 10.
In one embodiment, the limiting member 70 is disposed in an insulating manner with respect to the first battery assembly 20, so as to prevent the limiting member 70 from forming an electrical connection with the first battery assembly 20, which may affect the normal use of the battery pack.
The limiting member 70 may be a metal structure, and the insulating member may be an insulating film, and the insulating member may be disposed between the limiting member 70 and the first battery module 20 to insulate the limiting member 70 from the first battery module 20. Alternatively, a coating, such as alumina (Al), may be applied to the retaining member 70 2 O 3 ) Zirconium oxide (ZrO) 2 ) And the like.
In one embodiment, the fixing beam 80 is insulated from the first battery assembly 20, so as to prevent the fixing beam 80 from forming an electrical connection with the first battery assembly 20, which may affect the normal use of the battery pack.
The fixing beam 80 may be a metal beam, and an insulating member, which may be an insulating film, is disposed between the fixing beam 80 and the first battery assembly 20 to insulate the fixing beam 80 from the first battery assembly 20. Alternatively, a coating, such as alumina (Al), may be applied to the fixed beam 80 2 O 3 ) Zirconium oxide (ZrO) 2 ) Iso-ceramicsA material.
In one embodiment, the position-limiting member 70 and the first battery assembly 20 are disposed in an insulating manner, the fixing beam 80 and the first battery assembly 20 are disposed in an insulating manner, the position-limiting member 70 may be covered with an insulating film, and the fixing beam 80 may be covered with an insulating film.
In one embodiment, an insulating layer is disposed on at least one of the limiting member 70 and the fixing beam 80, wherein the limiting member 70 and the fixing beam 80 are welded to ensure reliable connection between the limiting member 70 and the fixing beam 80 and structural stability of the battery pack.
The limiting member 70 and the fixed beam 80 are connected in a welding mode to form welding slag, the insulating layer can be prevented from being scratched by the welding slag to achieve the effect of safety protection, and if the limiting member 70 and the fixed beam 80 are made of metal materials, the insulating film on the surface of the first battery 21 is damaged, high-temperature arc discharge can also cause safety problems, and therefore secondary protection of the first battery 21 can be achieved due to the arrangement of the insulating layer.
The insulating layer on the limiting member 70 and the fixed beam 80 may be an insulating film or a coating, and in order to facilitate welding of the limiting member 70 and the fixed beam 80, the welding position of the limiting member 70 and the fixed beam 80 may not be covered with the insulating layer, for example, an opening may be formed in the insulating layer.
In one embodiment, as shown in fig. 7, the battery pack further includes a support beam 90, the support beam 90 is disposed on the battery box 10, and the support beam 90 extends in the second direction, so that the end of the first battery assembly 20 and the stopper 70 are simultaneously in contact with the support beam 90, thereby supporting the first battery assembly 20 and the stopper 70, and increasing the structural strength of the battery box 10.
The end of the first battery assembly 20 may be the first battery 21, in which case the first battery 21 and the stopper 70 are simultaneously in contact with the support beams 90, or the end of the first battery assembly 20 may be an insulating plate, in which case the insulating plate and the stopper 70 are simultaneously in contact with the support beams 90.
It should be noted that the supporting beam 90 may be in direct contact with the first battery 21 at the end of the first battery assembly 20, or an insulating isolation plate may be disposed between the supporting beam 90 and the first battery 21, which is not limited herein, and the supporting beam 90 is heavy to provide a reliable supporting force for the first battery assembly 20 and the limiting member 70 and to increase the structural strength of the battery case 10.
In one embodiment, the length of the support beam 90 in the second direction may be substantially equal to the width dimension of the internal space of the battery case 10, so that the reliable reinforcement of the battery case 10 may be achieved.
A space may be formed between the support beam 90 and the battery case 10 after the side of the support beam 90 facing away from the first battery assembly 20 and the stopper 70 is connected to the battery case 10, and the space may be used for ventilation.
In one embodiment, the supporting beam 90 contacts the middle portion of the limiting member 70 along the third direction, so as to reliably support the limiting member 70 and avoid the problem of deformation of the limiting member 70.
In one embodiment, the limiting member 70 is provided with the vent 72, and an orthographic projection of the supporting beam 90 towards the plane where the limiting member 70 is located does not coincide with the vent 72, so that the supporting beam 90 can be prevented from shielding the vent 72, airflow can be ensured to form circulation in the battery box 10 through the vent 72, and the heat dissipation capability of the battery pack is improved.
Referring to fig. 7, a plurality of ventilation openings 72 may be disposed on the limiting member 70, and the ventilation openings 72 may be disposed on both upper and lower sides of the supporting beam 90 of the limiting member 70.
In one embodiment, as shown in fig. 1 to 3, the battery case 10 includes: a base plate 11; a first end plate 12; a second end plate 13, the first end plate 12 and the second end plate 13 being disposed at opposite sides of the bottom plate 11 in a first direction, the support beam 90 being connected to the first end plate 12; wherein, first end plate 12 is formed with accommodation space, and supporting beam 90 is located accommodation space, on the basis of realizing reliably fixing supporting beam 90, can form certain headspace, improves the space for follow-up gas circulation to the realization is to the reliable cooling of first battery pack 20.
In one embodiment, the bottom plate 11 and the first end plate 12 are of an integrally formed structure, and the bottom plate 11 and the first end plate 12 are sheet metal parts, so that not only can the forming efficiency of the bottom plate 11 and the first end plate 12 be improved, but also the structural strength of the bottom plate 11 and the first end plate 12 can be ensured, and thus the safety performance of the battery pack is improved.
In one embodiment, the bottom plate 11 is detachably connected to the second end plate 13, so as to facilitate maintenance of the second end plate 13 and subsequent maintenance of the first battery assembly 20, for example, the first battery assembly 20 can be conveniently detached after the second end plate 13 is detached.
In one embodiment, the ventilation channel 40 is formed at one side of the first battery assembly 20 where the limiting member 70 is disposed, so that air can flow through the ventilation channel 40, thereby adjusting the temperature of the first battery assembly 20 and improving the heat dissipation capability of the battery pack.
In one embodiment, the side of the first battery assembly 20 provided with the stopper 70 may form the ventilation flow path 40 with the inner wall of the battery case 10.
In one embodiment, as shown in fig. 5, the battery pack further includes a second battery assembly 30, the second battery assembly 30 is disposed in the battery box 10, the second battery assembly 30 includes a plurality of second batteries 31 stacked along a first direction, the first battery assembly 20, the stopper 70 and the second battery assembly 30 are disposed along a second direction, a ventilation flow channel 40 is formed between the first battery assembly 20 and the second battery assembly 30, the stopper 70 is in contact with the second battery 31 at an end of the second battery assembly 30, the stopper 70 can simultaneously position the stack of the first battery assembly 20 and the second battery assembly 30, so as to improve the assembly efficiency of the battery pack, and the stopper 70 can correspond to the ventilation flow channel 40, so that airflow in the ventilation flow channel 40 can realize rapid cooling of the first battery assembly 20 and the second battery assembly 30, thereby improving the safety performance of the battery pack.
The ventilation channel 40 is formed between the first battery assembly 20, the limiting member 70 and the second battery assembly 30, the limiting member 70 can be located at one end of the ventilation channel 40, and the length of the limiting member 70 is relatively small, for example, in the first direction, the length occupied by the limiting member 70 is not greater than the length occupied by the two first batteries 21, so that the ventilation channel 40 can be ensured to have a sufficient length, thereby realizing reliable cooling of the first battery assembly 20 and the second battery assembly 30.
In one embodiment, as shown in fig. 2 to 5, the battery pack further includes a stop structure 50, and the stop structure 50 is disposed on the upper portions of the first battery assembly 20 and the second battery assembly 30 to block the upper opening of the ventilation flow channel 40, so that a directional ventilation flow channel 40 can be formed between the first battery assembly 20 and the second battery assembly 30, and the airflow is prevented from diffusing in all directions, thereby increasing the heat dissipation efficiency of the battery pack and improving the safety performance of the battery pack.
It should be noted that the first cell assembly 20 includes a plurality of first cells 21 stacked in the first direction, the second cell assembly 30 includes a plurality of second cells 31 stacked in the first direction, and a ventilation flow channel 40 is formed between the first cell assembly 20 and the second cell assembly 30, so that air can flow through the ventilation flow channel 40, thereby adjusting the temperature of the first cells 21 and the second cells 31. Because the stopping structure 50 is disposed on the upper portions of the first battery assembly 20 and the second battery assembly 30, the upper opening of the ventilation flow channel 40 can be blocked, that is, the air flow cannot flow from the upper portions of the first battery assembly 20 and the second battery assembly 30, so that the direction of the air flow diffusion is fixed, the flowing direction of the air flow can be relatively determined, the heat dissipation efficiency of the battery pack can be improved, the heat dissipation performance of the battery pack is improved, and the safety performance of the battery pack is improved.
The first battery 21 and the second battery 31 may be the same battery, or the first battery 21 and the second battery 31 may be different batteries. And a battery includes a cell and an electrolyte, and is a minimum unit capable of performing electrochemical reactions such as charge/discharge. The battery cell refers to a unit formed by winding or laminating a stack including a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. Wherein the polarities of the first electrode and the second electrode can be interchanged.
The battery is the lamination formula battery, and it is convenient not only to organize, and can process and obtain the longer battery of length. Specifically, electric core is lamination formula electric core, and electric core has first pole piece that stacks up each other, with first pole piece opposite electric property's second pole piece and the diaphragm of setting between first pole piece and second pole piece to make many to pile up and form lamination formula electric core to first pole piece and second pole piece.
Optionally, the battery may be a wound battery, that is, a first pole piece, a second pole piece opposite to the first pole piece in electrical property, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain a wound battery core.
In one embodiment, at least a portion of the stopping structure 50 extends along the first direction and is located between the first battery assembly 20 and the second battery assembly 30, so that the upper opening of the ventilation flow channel 40 can be effectively blocked, and the sealing performance of the upper opening of the ventilation flow channel 40 can be improved, and thus the air flow can be effectively circulated in the ventilation flow channel 40, and the heat dissipation efficiency of the battery pack can be improved.
Two opposite stopper structures 50 may be in contact with the first battery assembly 20 and the second battery assembly 30, respectively, so that effective sealing of the upper opening of the ventilation flow path 40 may be achieved. And the stopper structure 50 may be used for positioning the first and second battery packs 20 and 30 when the first and second battery packs 20 and 30 are stacked, thereby improving the stacking efficiency of the first and second battery packs 20 and 30.
In one embodiment, the stopping structure 50 extends along the first direction, and one end of the stopping structure 50 is connected to the limiting member 70, so that the stopping structure 50 is effectively fixed, and the stopping structure 50 and the limiting member 70 can both form a seal for the ventilation flow channel 40, which can improve the cooling performance of the airflow to some extent.
In one embodiment, as shown in fig. 4, the battery pack further includes a fixing end plate 60, the fixing end plate 60 being disposed inside the battery case 10 and located at one end of the first and second battery packs 20 and 30 such that the fixing end plate 60 and the first battery pack 20 are disposed in a first direction; wherein, two ends of the stopping structure 50 are respectively connected to the fixed end plate 60 and the limiting member 70.
In one embodiment, as shown in fig. 5 and 7, the limiting member 70 blocks the end opening of the ventilation channel 40, and the limiting member 70 is provided with a ventilation opening 72, and the ventilation opening 72 is communicated with the ventilation channel 40, so that air flow can enter the ventilation channel 40 through the ventilation opening 72, thereby achieving effective cooling of the first battery 21 and the second battery 31 at the ends.
Since the space for airflow is formed between the support beam 90 and the first end plate 12, the vent 72 is provided in the stopper 70, so that the gas can be easily introduced from the rear side, and the rear-end first cell 21 and the rear-end second cell 31 can be cooled by the vent 72.
In one embodiment, the number of the ventilation openings 72 is multiple, and the sum of the areas of the ventilation openings 72 occupies 5% to 15% of the area of the side of the limiting member 70 facing the ventilation channel 40, so that on the basis of ensuring that a large amount of airflow can enter between the first batteries 21 and between the second batteries 31, the airflow can also enter the ventilation channel 40 through the ventilation openings 72, and cooling of the first batteries 21 and the second batteries 31 at the rear end is achieved.
In one embodiment, as shown in fig. 2 and 3, a first flow channel 22 is formed between adjacent first batteries 21, the first flow channel 22 is communicated with a ventilation flow channel 40, a second flow channel 32 is formed between adjacent second batteries 31, and the second flow channel 32 is communicated with the ventilation flow channel 40, that is, air flow can circulate inside the battery pack through the first flow channel 22, the second flow channel 32 and the ventilation flow channel 40, so as to adjust the temperature inside the battery pack, and effective heat dissipation of the first batteries 21 and the second batteries 31 can be realized, so that the safety use performance of the battery pack is improved, and the problems of thermal runaway and the like inside the battery pack are avoided.
The airflow can enter the ventilation channel 40 from the first channel 22 and the second channel 32, the limiting member 70 and the stopping structure 50 can partially seal the ventilation channel 40, that is, a large amount of airflow can be ensured to enter the ventilation channel 40 from the first channel 22 and the second channel 32, so that the first battery 21 and the second battery 31 can be efficiently dissipated through the surfaces of the first battery 21 and the second battery 31, and the limiting member 70 is provided with the vent 72, so that the gas can enter from the rear side and then cool the first battery 21 and the second battery 31 at the rear end through the vent 72.
Further, the sum of the areas of the plurality of ventilation openings 72 occupies 5% to 15% of the area of the side of the limiting member 70 facing the ventilation channel 40, and if the area of the ventilation openings 72 is too large, the airflow entering the ventilation channel 40 from the first flow channel 22 and the second flow channel 32 is reduced, which is not favorable for heat dissipation of the first battery assembly 20 and the second battery assembly 30. The area of the ventilation openings 72 is too small, so that the first battery 21 and the second battery 31 at the rear end cannot obtain a good heat dissipation effect, and in the embodiment, the sum of the areas of the ventilation openings 72 occupies 5% -15% of the area of one side of the limiting member 70 facing the ventilation flow channel 40, so that the temperature difference of the first battery assembly 20 or the second battery assembly 30 can be reduced, and the safe use of the battery pack is ensured.
The sum of the areas of the plurality of ventilation openings 72 occupies 5%, 5.5%, 6%, 6.5%, 7%, 8%, 9%, 9.5%, 10%, 10.5%, 11%, 11.5%, 12%, 12.5%, 13%, 13.5%, 15%, 14.5%, 15%, etc. of the area of the side of the limiting member 70 facing the ventilation flow passage 40.
In one embodiment, as shown in fig. 1, a plurality of vent holes 14 are formed in the battery case 10, and external air can enter the inside of the battery case 10 through the plurality of vent holes 14, thereby achieving reliable heat dissipation from the inside of the battery pack.
As shown in fig. 1, the battery case 10 further includes a cover plate 15, the cover plate 15 is connected to the first end plate 12 and the second end plate 13, and a plurality of vent holes 14 may be formed in the cover plate 15.
In one embodiment, as shown in fig. 4, the battery pack further includes a blower 100, the blower 100 is disposed in the battery box 10, and an air inlet of the blower 100 is communicated with an end of the ventilation channel 40 away from the limiting member 70, so that an air flow can circulate inside the battery pack through operation of the blower 100, thereby adjusting the temperature inside the battery pack. The blower 100 may be a fan, an air conditioner, or the like, but is not limited thereto, and the blower 100 may be fixed to the fixing end plate 60, or the blower 100 may be fixed to the battery case 10. The battery case 10 needs to be provided with a through hole through which the air flow is discharged from the battery case 10.
During operation of the blower 100, air flow outside the battery pack can enter the battery box 10 through the vent 14 and enter the vent channel 40 through the first channel 22, the second channel 32 and the vent 72, during this process, the air flow can cool the first battery 21 and the second battery 31, and finally the air flow is discharged to the outside of the battery pack through the air outlet of the blower 100, so as to take away heat inside the battery pack through air flow, thereby improving safety use performance of the battery pack.
In one embodiment, the battery case 10 includes: a base plate 11; a first end plate 12; a second end plate 13, the first end plate 12 and the second end plate 13 being disposed on opposite sides of the bottom plate 11 along the first direction; a cavity is formed between the limiting member 70 and the first end plate 12, the cavity is communicated with the ventilation channel 40, and the first end plate 12 is provided with the ventilation hole 14, so that an airflow can enter the cavity through the ventilation hole 14 and enter the ventilation channel 40 through the cavity, and reliable heat dissipation of the first battery assembly 20 and the second battery assembly 30 is realized.
In one embodiment, the limiting member 70 is provided with a vent 72, and the chamber is communicated with the vent channel 40 through the vent 72, so as to improve the flowing capacity of the airflow, and further improve the heat dissipation efficiency of the airflow to the first battery assembly 20 and the second battery assembly 30.
As shown in fig. 5, the ventilation channel 40 is formed between the first battery assembly 20 and the second battery assembly 30, as shown in fig. 7, a plurality of ventilation openings 72 may be disposed on the limiting member 70, and one side of the limiting member 70 facing the first end plate 12 has a receiving groove 71, at this time, as shown in fig. 3, when the first end plate 12 is shielded at the limiting member 70, a cavity may be formed between the first end plate 12 and the limiting member 70, and the cavity may be communicated with the ventilation channel 40 through the plurality of ventilation openings 72. The air flow can enter the cavity formed by the first end plate 12 and the limiting member 70 through the vent hole 14 on the side of the first end plate 12, and then enter the ventilation flow channel 40 through the vent hole 72 on the limiting member 70, so that the heat exchange can be performed on the batteries at the end part, the problem of uneven heat distribution is avoided, and the heat dissipation capability of the battery pack is improved.
An embodiment of the invention also provides a battery cluster which comprises the battery pack.
The battery cluster according to one embodiment of the present invention includes a battery pack, the battery pack includes a battery case 10, a first battery assembly 20, and a stopper 70, and the first battery assembly 20 and the stopper 70 are disposed in the battery case 10. Through being provided with the locating part 70 in the battery box 10 to when first battery pack 20 piles up, the locating part 70 can realize spacing to first battery 21 of first battery pack 20 to this makes things convenient for the piling up of first battery pack 20, thereby has improved the efficiency that first battery pack 20 packed into battery box 10, and the length that the locating part 70 occupy is not more than the length that two first batteries 21 occupy, the space that the locating part 70 occupied can not too big promptly, thereby avoid appearing the too big problem of locating part 70 weight, with this whole weight that reduces the battery package. The stoppers 70 not only can achieve stacking stoppers for the first battery pack 20, but also do not increase the weight of the battery pack excessively, thereby improving the assembly efficiency of the battery cluster.
In one embodiment, as shown in fig. 8, the battery cluster includes a frame 1, the battery pack 2 is disposed in the frame 1, and the frame 1 may form a flow channel communicated with the vent 14, so that gas circulation may be formed between the inside of the battery pack 2 and the frame 1, thereby ensuring efficient heat dissipation of the battery pack 2, and thus improving safety performance of the battery pack.
The housing 1 may be formed with a receiving compartment in which a battery pack may be disposed, and the battery pack may communicate with the receiving compartment through the vent hole 14. The battery cluster may include a plurality of battery packs, and the plurality of battery packs may be disposed on the rack.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (18)
1. A battery pack, comprising:
a battery case (10);
a first battery assembly (20), the first battery assembly (20) being disposed within the battery case (10), the first battery assembly (20) including a plurality of first batteries (21) stacked in a first direction;
the limiting piece (70), the limiting piece (70) is arranged in the battery box body (10), the first battery assembly (20) and the limiting piece (70) are arranged along a second direction, so that the limiting piece (70) is in contact with a first battery (21) at the end of the first battery assembly (20), the first direction is basically perpendicular to the second direction, the limiting piece (70) extends along a third direction, the third direction is basically perpendicular to the first direction, the third direction is basically perpendicular to the second direction, and the third direction is perpendicular to the bottom surface of the battery box body (10);
a second battery assembly (30), wherein the second battery assembly (30) is disposed in the battery case (10), the second battery assembly (30) includes a plurality of second batteries (31) stacked along the first direction, the first battery assembly (20), the stopper (70), and the second battery assembly (30) are disposed along the second direction, a ventilation flow channel (40) is formed between the first battery assembly (20) and the second battery assembly (30), and the stopper (70) is in contact with the second batteries (31) at the end of the second battery assembly (30); the limiting piece (70) blocks an end opening of the ventilation flow channel (40), a first flow channel (22) is formed between adjacent first batteries (21), the first flow channel (22) is communicated with the ventilation flow channel (40), a second flow channel (32) is formed between adjacent second batteries (31), and the second flow channel (32) is communicated with the ventilation flow channel (40);
a stop structure (50), wherein the stop structure (50) is arranged at the upper parts of the first battery component (20) and the second battery component (30) to block the upper opening of the ventilation flow channel (40); the stopping structure (50) extends along the first direction, and one end of the stopping structure (50) is connected with the limiting piece (70);
wherein, along the first direction, the length occupied by the limiting piece (70) is not more than the length occupied by the two first batteries (21).
2. A battery pack according to claim 1, wherein the retaining member (70) occupies no more than one of the first cells (21) in the first direction.
3. A battery pack according to claim 2, wherein the retaining member (70) occupies no more than half of the length occupied by the first battery (21) in the first direction.
4. The battery pack according to claim 1, wherein the height of the stopper (70) is not greater than the height of the first battery (21) in the third direction;
wherein, along the third direction, the top end of the limiting piece (70) is not beyond the top end of the first battery (21).
5. The battery pack according to claim 4, further comprising a fixing beam (80), the fixing beam (80) being provided to the battery case (10), the fixing beam (80) extending in the first direction such that the fixing beam (80) is in contact with the first battery assembly (20);
the limiting piece (70) is connected to the fixing beam (80), and the height of the fixing beam (80) is smaller than that of the first battery (21) along the third direction.
6. Battery pack according to claim 5, characterized in that the retaining element (70) is arranged in an insulating manner from the first battery assembly (20) and/or the fastening beam (80) is arranged in an insulating manner from the first battery assembly (20).
7. The battery pack according to claim 6, wherein at least one of the retaining member (70) and the fixing beam (80) is provided with an insulating layer;
wherein the limiting piece (70) and the fixed beam (80) are welded.
8. The battery pack according to claim 1, further comprising a support beam (90), the support beam (90) being provided to the battery case (10), the support beam (90) extending in the second direction so that the end of the first battery assembly (20) and the stopper (70) are simultaneously in contact with the support beam (90).
9. The battery pack according to claim 8, wherein the support beam (90) is in contact with a middle portion of the stopper (70) in the third direction.
10. A battery pack according to claim 9, wherein the retaining member (70) is provided with a vent (72), and an orthographic projection of the support beam (90) onto the plane of the retaining member (70) does not coincide with the vent (72).
11. The battery pack according to claim 8, wherein the battery case (10) includes:
a base plate (11);
a first end plate (12);
a second end plate (13), the first end plate (12) and the second end plate (13) being disposed on opposite sides of the bottom plate (11) in the first direction, the support beam (90) being connected to the first end plate (12);
wherein the first end plate (12) is formed with an accommodation space in which the support beam (90) is located.
12. The battery pack according to claim 11, wherein the bottom plate (11) and the first end plate (12) are of an integrally formed structure, and the bottom plate (11) and the first end plate (12) are made of sheet metal.
13. The battery pack according to claim 1, wherein the stopper (70) is provided with a vent (72), and the vent (72) is communicated with the vent flow channel (40).
14. The battery pack according to claim 13, wherein the vent (72) is plural, and the sum of areas of the plural vent (72) occupies 5% to 15% of an area of a side of the stopper (70) facing the vent flow path (40).
15. The battery pack according to claim 13, wherein the battery case (10) is provided with a plurality of vent holes (14).
16. The battery pack according to claim 13, further comprising a blower (100), wherein the blower (100) is disposed in the battery box (10), and an air inlet of the blower (100) is communicated with an end of the ventilation flow channel (40) away from the stopper (70).
17. The battery pack according to claim 1, wherein the battery case (10) includes:
a base plate (11);
a first end plate (12);
a second end plate (13), the first end plate (12) and the second end plate (13) being disposed on opposite sides of the bottom plate (11) along the first direction;
a cavity is formed between the limiting piece (70) and the first end plate (12), the cavity is communicated with the ventilation flow channel (40), and a ventilation hole (14) is formed in the first end plate (12).
18. The battery pack according to claim 17, wherein the retaining member (70) is provided with a vent (72), and the chamber is communicated with the vent channel (40) through the vent (72).
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| CN202211528352.5A CN115548551B (en) | 2022-12-01 | 2022-12-01 | Battery pack |
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| CN202211528352.5A CN115548551B (en) | 2022-12-01 | 2022-12-01 | Battery pack |
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| CN115548551B true CN115548551B (en) | 2023-03-28 |
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