CN115548551B - Battery pack - Google Patents

Abstract

The present invention relates to the field of battery technology, and proposes a battery pack, including: a battery box; a first battery assembly, the first battery assembly is arranged in the battery box, and the first battery assembly includes a plurality of first batteries stacked along a first direction. battery; a limiter, the limiter is arranged in the battery box, the first battery component and the limiter are arranged along the second direction, so that the limiter is in contact with the first battery at the end of the first battery component, the second One direction is substantially perpendicular to the second direction, and the limiting member extends along the third direction, wherein, along the first direction, the length occupied by the limiting member is not greater than the length occupied by the two first batteries, and the space occupied by the limiting member is not larger than the length occupied by the two first batteries. It will be too large, so as to avoid the problem of excessive weight of the limiter, so as to reduce the overall weight of the battery pack. The limiting member can not only limit the stacking of the first battery assembly, but also not increase the weight of the battery pack too much, thereby improving the assembly efficiency of the battery pack.

Description

battery pack

technical field

The invention relates to the technical field of batteries, in particular to a battery pack.

Background technique

In the related art, the battery box is used to accommodate a battery assembly formed by a plurality of batteries, so as to protect the batteries. During the process of putting the battery assembly into the battery box, due to the limitation of the internal space of the battery box, it is not easy to realize positioning.

Contents of the invention

The invention provides a battery pack to improve the assembly efficiency of the battery pack.

The invention provides a battery pack, comprising:

battery box;

a first battery assembly, the first battery assembly is disposed in the battery box, and the first battery assembly includes a plurality of first batteries stacked along a first direction;

A limiter, the limiter is arranged in the battery box, the first battery component and the limiter are arranged along the second direction, so that the limiter is in contact with the first battery at the end of the first battery component, and the first direction substantially perpendicular to the second direction, the limiting member 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;

Wherein, along the first direction, the length occupied by the limiting member is not greater than the length occupied by the two first batteries.

The battery pack according to the embodiment of the present invention includes a battery case, a first battery assembly, and a position limiting member, and the first battery assembly and the position limiting member are both arranged in the battery case. By arranging the limiting member in the battery box, when the first battery assembly is stacked, the limiting member can limit the first battery of the first battery assembly, thereby facilitating the stacking of the first battery assembly, thereby improving The efficiency of loading the first battery assembly into the battery box is improved, and the length occupied by the limiting member is not greater than the length occupied by the two first batteries, that is, the space occupied by the limiting member will not be too large, so as to avoid the occurrence of the limiting member The problem of excessive weight is used to reduce the overall weight of the battery pack. The limiting member can not only limit the stacking of the first battery assembly, but also not increase the weight of the battery pack too much, thereby improving the assembly efficiency of the battery pack.

Description of drawings

For a better understanding of the present disclosure, reference may be made to the embodiments illustrated in the following figures. Components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, related elements or components may be arranged differently as known in the art. In addition, in the drawings, the same reference numerals denote the same or similar components in the respective drawings. in:

Fig. 1 is a partial structural schematic diagram of a battery pack shown according to an exemplary embodiment;

Fig. 2 is a partial structural schematic view of a battery pack shown according to an exemplary embodiment;

Fig. 3 is a partial structural schematic view of a battery pack shown according to an exemplary embodiment;

Fig. 4 is a schematic diagram of a partial structure of a battery pack according to an exemplary embodiment;

Fig. 5 is a schematic structural view of a part of a battery pack according to an exemplary embodiment;

Fig. 6 is a schematic structural diagram of another part of a battery pack according to an exemplary embodiment;

Fig. 7 is a schematic structural diagram of an internal part of a battery pack according to an exemplary embodiment;

Fig. 8 is a schematic structural diagram of a battery cluster according to an exemplary embodiment.

The reference signs are explained as follows:

1. Rack; 2. Battery pack; 10. Battery box; 11. Bottom plate; 12. First end plate; 13. Second end plate; 14. Ventilation hole; 15. Cover plate; 20. First battery assembly ; 21, the first battery; 22, the first flow channel; 30, the second battery assembly; 31, the second battery; 32, the second flow channel; 40, the ventilation channel; 50, the stop structure; 60, the fixed end plate ; 70, limit piece; 71, accommodating groove; 72, air vent; 80, fixed beam; 90, support beam; 100, fan.

Detailed ways

The following will clearly and completely describe the technical solutions in the exemplary embodiments of the present disclosure with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are for illustrative purposes only, and are not intended to limit the protection scope of the present disclosure, so it should be understood that various modifications can be made to the exemplary embodiments without departing from the protection scope of the present disclosure. modifications and changes.

In the description of the present disclosure, unless otherwise clearly specified and limited, the terms "first" and "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "plurality" is means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the" or "an" are likewise intended to mean one of a possible plurality of such objects.

Unless otherwise specified or explained, the terms "connected" and "fixed" should be interpreted in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or integral connection, or electrical connection, or Connection; "connection" can be a direct connection or an indirect connection through an intermediary. Those skilled in the art can understand the specific meanings of the above terms in the present disclosure according to specific situations.

Furthermore, in the description of the present disclosure, it should be understood that the orientation words such as "upper", "lower", "inner" and "outer" described in the exemplary embodiments of the present disclosure are based on the angles shown in the drawings It should not be construed as limiting the example embodiments of the present disclosure. It also needs to be understood that, in this context, when an element or feature is referred to as being "on," "under," or "inside" or "outside" another element(s), it can not only be directly connected In other (one or more) elements "on", "under" or "inside", "outside", it can also be indirectly connected to another (one or more) elements "on", "under" or "outside" through intermediate elements inside and outside".

An embodiment of the present invention provides a battery pack, please refer to FIG. 1 to FIG. 7, the battery pack includes: a battery case 10; A battery assembly 20 includes a plurality of first batteries 21 stacked along a first direction; a stopper 70, the stopper 70 is arranged in the battery box 10, and the first battery assembly 20 and the stopper 70 are arranged along a second direction , so that the limiting member 70 is in contact 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, and the third direction is substantially perpendicular to The first direction and the third direction are substantially perpendicular to the second direction, and the third direction is perpendicular to the bottom surface of the battery box 10; wherein, along the first direction, the length occupied by the limiting member 70 is not greater than two first batteries 21 Occupied length.

A 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 , and the first battery assembly 20 and the limiting member 70 are both disposed in the battery case 10 . By setting the limit piece 70 in the battery box 10, when the first battery assembly 20 is stacked, the limit piece 70 can realize the limit of the first battery 21 of the first battery assembly 20, so as to facilitate the first The stacking of battery assemblies 20 improves the efficiency of loading the first battery assembly 20 into the battery case 10, and the length occupied by the limiting member 70 is not greater than the length occupied by the two first batteries 21, that is, the length occupied by the limiting member 70 The space will not be too large, so as to avoid the problem of excessive weight of the limiting member 70, so as to reduce the overall weight of the battery pack. The limiting member 70 can not only limit the stacking of the first battery assembly 20, but also 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 loaded into the battery case 10, that is, the plurality of first batteries 21 can be packed into the battery case 10 one by one. When the first first battery 21 is loaded, the first first battery 21 can be in limited contact with the stopper 70, thereby realizing the positioning of the first first battery 21, and each subsequent first battery The stacking of 21 will have a positioning reference, so that the stacking efficiency of each subsequent first battery 21 can be improved. Alternatively, the first battery assembly 20 can fix a plurality of first batteries 21 through the end plates and side plates to form a battery module, and the battery module can be packed into the battery box 10 at one time. The member 70 can be in contact with the first battery 21 at the end of the battery module, so as to realize the rapid positioning of the battery module, thereby improving the assembly efficiency of the battery module.

As shown in FIG. 6 , the first battery assembly 20 includes a plurality of first batteries 21 stacked along the first direction, the first battery assembly 20 and the limiting member 70 are arranged along the second direction, and the limiting member 70 extends along the third direction , wherein, the first direction is denoted as A, the second direction is denoted as B, and the third direction is denoted as C, the first direction may be the length direction of the battery case 10, and the second direction may be the width direction of the battery case 10, The third direction may be the height direction of the battery case 10 . The limiting member 70 is at least in contact with the first battery 21 at the end of the first battery assembly 20 , that is, at least the first battery 21 in the first stack can be limited, thereby improving the stacking efficiency of the first battery assembly 20 .

Along the first direction, the length occupied by the limiting member 70 is not greater than the length occupied by the two first batteries 21, that is, the limiting member 70 can form limiting contact with the two first batteries 21 at most, or, the limiting member 70 At most three first batteries 21 can be in limiting contact, for example, the middle of the limiting member 70 can form limiting contact with one first battery 21, and the opposite sides of the limiting member 70 can be in contact with the other two first batteries. 21 to form a limit contact. The limited size of the limiting member 70 can prevent the limiting member 70 from being too large and affect the internal space layout of the battery pack on the basis of realizing the positioning, and can avoid the problem that the limiting member 70 is too heavy.

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 can form a limiting contact with one first battery 21 at most, or, The limiting member 70 can form limiting contact with two first batteries 21 at most, and the limiting member 70 can not occupy too much space inside the battery box 10 on the basis of positioning.

The limiter 70 can be arranged close to the inner wall of the battery case 10, for example, the limiter 70 and the surface of the first battery 21 facing the inner wall of the battery case 10 are flush, and at this time, the limiter 70 can be at most one first battery 21 to form a limit contact. Alternatively, the surface of the limiting member 70 and the surface of the first battery 21 facing the inner wall of the battery case 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 case 10 is greater than that of the surface of the first battery 21 The distance from the surface of the inner wall of the battery case 10 , at this time, the limiting member 70 can form limiting contact with two first batteries 21 at most.

It should be noted that, in the above embodiment, the limiting member 70 can at least be in contact with the first battery 21 at the end of the first battery assembly 20, so that when the first battery assembly 20 is stacked, at least the initial The stacked first battery 21 is limited to form a reference for subsequent stacking of other first batteries 21 , thereby improving the assembly efficiency of the first battery assembly 20 .

In one embodiment, along the first direction, the length occupied by the limiting member 70 is not greater than half of the length occupied by the first battery 21, so as to reduce the size of the limiting member 70 and maximize the use of the battery box 10 The inner space, for example, along the first direction, the space opposite to the limiting member 70 can 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, and the height of the limiting member 70 can also be avoided while the limiting member 70 can limit the position of the first battery 21. If it is too high, the height space occupancy rate of the battery pack will be increased, and it can avoid that the limiting member 70 is too large to contact the first battery 21 and cause damage to the first battery 21 .

In one embodiment, along the first direction, the length occupied by the limiting member 70 is not greater than half of the length occupied by the first battery 21, and along the third direction, the height of the limiting member 70 is not greater than the height of the first battery 21 , that is, the space occupied by the limiting member 70 is relatively small, but the first battery 21 at the end can be limited. Along the third direction, the top of the limiting member 70 does not exceed the top of the first battery 21 .

In one embodiment, as shown in FIG. 6 , the battery pack further includes a fixed beam 80 , the fixed beam 80 is disposed on the battery case 10 , and the fixed beam 80 extends along a first direction, so that the fixed beam 80 and the first battery assembly 20 Contact, that is, the fixed beam 80 can also form a limiting fixation on the first battery assembly 20, so as to ensure that the first battery assembly 20 can be stably installed in the battery box 10, so as to avoid shaking of the first battery assembly 20, etc. problem, and the fixing beam 80 can also form a limit to the stacking of the first battery assemblies 20 .

In one embodiment, as shown in FIG. 6 , the limiting member 70 is connected to the fixed beam 80. Along the third direction, the height of the fixed beam 80 is smaller than the height of the first battery 21, that is, the top of the fixed beam 80 does not exceed the first battery 21. The top of the battery 21 is arranged so as to prevent the fixed beam 80 from occupying too much height space, and it can ensure that the top of the limiting member 70 does not exceed the top of the first battery 21 .

The limiter 70 can be connected to the top of the fixed beam 80, and the top of the limiter 70 is not set beyond the top of the first battery 21, therefore, the sum of the heights of the limiter 70 and the fixed beam 80 is not greater than the first battery 21, so as to ensure that the space on the fixed beam 80 can be reserved space, for example, can be used as a heat dissipation space.

In some embodiments, it is not excluded that the limiting member 70 may be connected to the end of the fixed beam 80 , and the end of the fixed beam 80 may be flush with the top of the first battery 21 .

In one embodiment, the fixed beam 80 is arranged on the bottom surface of the battery box 10, so that the fixed beam 80 can be stably connected to the battery box 10, and can provide reinforcement for the bottom surface of the battery box 10 to avoid external impact on the battery box When the bottom surface of the body 10 is damaged, the bottom surface of the battery case 10 is deformed and damaged.

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 , that is, the fixing beam 80 may be suspended and connected to the side of the battery box 10 .

In one embodiment, the limiting member 70 is insulated from the first battery assembly 20 , so as to prevent the limiting member 70 from forming an electrical connection with the first battery assembly 20 and affecting the normal use of the battery pack.

The limiting member 70 can be a metal structure, and the insulating arrangement between the limiting member 70 and the first battery component 20 can be achieved by disposing an insulating member between the limiting member 70 and the first battery component 20 , and the insulating member can be an insulating film. Alternatively, a coating, such as aluminum oxide (Al ₂ O ₃ ), zirconium oxide (ZrO ₂ ) and other ceramic materials, can be coated on the limiting member 70 .

In one embodiment, the fixing beam 80 is insulated from the first battery assembly 20 , so as to prevent the electrical connection between the fixing beam 80 and the first battery assembly 20 from affecting the normal use of the battery pack.

The fixed beam 80 may be a metal beam, and an insulating member is provided between the fixed beam 80 and the first battery assembly 20 to realize the insulation between the fixed beam 80 and the first battery assembly 20 , and the insulating member may be an insulating film. Alternatively, a coating, such as alumina (Al ₂ O ₃ ), zirconia (ZrO ₂ ) and other ceramic materials, can be coated on the fixed beam 80 .

In one embodiment, the spacer 70 is insulated from the first battery assembly 20, and the fixed beam 80 is insulated from the first battery assembly 20. The spacer 70 may be covered with an insulating film, and the spacer 80 May be covered with an insulating film.

In one embodiment, at least one of the limiting member 70 and the fixed beam 80 is provided with an insulating layer, wherein the limiting member 70 and the fixed beam 80 are welded to ensure reliable connection between the limiting member 70 and the fixed beam 80 , to ensure the structural stability of the battery pack.

There will be welding slag in the welding connection between the limiting member 70 and the fixed beam 80, and the setting of the insulating layer can prevent the welding slag from scratching the insulating layer on the surface of the first battery 21, which plays a role of safety protection, and considering that the limiting member 70 and the fixed beam 80 may be a metal material. If the insulating film on the surface of the first battery 21 is damaged, high-temperature arcing will also cause safety problems. Therefore, the setting of the insulating layer can realize secondary protection for the first battery 21 .

The insulating layer on the limiter 70 and the fixed beam 80 can be an insulating film or a coating. In order to facilitate the welding of the limiter 70 and the fixed beam 80, the welding position of the limiter 70 and the fixed beam 80 can not be covered with an insulating layer. The layer, for example, may have openings in the insulating layer.

In one embodiment, as shown in FIG. 7 , the battery pack further includes a support beam 90 disposed on the battery box 10, and the support beam 90 extends along the second direction, so that the end of the first battery assembly 20 and the The limiting member 70 is in contact with the support beam 90 at the same time, so as to support the first battery assembly 20 and the limiting member 70 , and increase the structural strength of the battery box 10 .

The end of the first battery assembly 20 can be the first battery 21, at this time, the first battery 21 and the stopper 70 are in contact with the support beam 90 at the same time, or the end of the first battery assembly 20 can be an insulating plate, At this time, the insulating plate and the limiting member 70 are in contact with the supporting beam 90 at the same time.

It should be noted that the support 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 provided between the support beam 90 and the first battery 21, which is not limited herein. The support beam 90 focuses on providing reliable support for the first battery assembly 20 and the limiting member 70 , and increasing the structural strength of the battery box 10 .

In one embodiment, along the second direction, the length of the support beam 90 may be substantially equal to the width of the inner space of the battery box 10 , so as to achieve reliable reinforcement of the battery box 10 .

A space may be formed on the side of the support beam 90 away from the first battery assembly 20 and the limiting member 70, that is, after the side of the supporting beam 90 away from the first battery assembly 20 and the limiting member 70 is connected to the battery case 10, the support A space may be formed between the beam 90 and the battery case 10, and this space may be used for ventilation.

In one embodiment, along the third direction, the support beam 90 is in contact with the middle of the limiting member 70 , so as to achieve reliable support for the limiting member 70 and avoid problems such as deformation of the limiting member 70 .

In one embodiment, the limiting member 70 is provided with a ventilation opening 72, and the orthographic projection of the support beam 90 toward the plane where the limiting member 70 is located does not coincide with the ventilation opening 72, thereby preventing the support beam 90 from covering the ventilation opening 72, ensuring The air flow can form a circulation in the battery case 10 through the air vent 72 to improve the heat dissipation capability of the battery pack.

As shown in FIG. 7 , a plurality of ventilation openings 72 may be provided on the limiting member 70 , and ventilation openings 72 may be provided on both upper and lower sides of the supporting beam 90 on the limiting member 70 .

In one embodiment, as shown in Figures 1 to 3, the battery case 10 includes: a bottom plate 11; a first end plate 12; a second end plate 13, the first end plate 12 and the second end plate 13 are along the first The direction is set on the opposite sides of the base plate 11, and the support beam 90 is connected to the first end plate 12; wherein, the first end plate 12 forms an accommodation space, and the support beam 90 is located in the accommodation space, so that the support beam 90 can be reliably fixed. Basically, a certain reserved space can be formed to increase the space for subsequent gas circulation, so as to achieve reliable cooling of the first battery assembly 20 .

In one embodiment, the bottom plate 11 and the first end plate 12 are integrally formed, and the bottom plate 11 and the first end plate 12 are sheet metal parts, which not only can improve the forming efficiency of the bottom plate 11 and the first end plate 12, but also can The structural strength of the bottom plate 11 and the first end plate 12 is ensured, thereby improving the safety performance of the battery pack.

In one embodiment, the bottom plate 11 is detachably connected to the second end plate 13, which not only facilitates the maintenance and replacement of the second end plate 13, but also facilitates the subsequent maintenance of the first battery assembly 20. After the two end plates 13, the first battery assembly 20 is conveniently disassembled.

In one embodiment, the ventilation channel 40 is formed on the side of the first battery assembly 20 provided with the limiting member 70, so that the air flow can circulate in the ventilation channel 40, so as to realize the temperature control of the first battery assembly 20. Adjust to improve the heat dissipation capacity of the battery pack.

In one embodiment, a ventilation passage 40 may be formed between the side of the first battery assembly 20 where the limiting member 70 is disposed and 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 case 10, and the second battery assembly 30 includes a plurality of first batteries stacked along the first direction. The second battery 31, the first battery assembly 20, the limiting member 70, and the second battery assembly 30 are arranged along the second direction, the ventilation channel 40 is formed between the first battery assembly 20 and the second battery assembly 30, and the limiting member 70 and the second battery assembly 30 are arranged along the second direction. The second battery 31 at the end of the second battery assembly 30 is in contact, and the stopper 70 can position the stack of the first battery assembly 20 and the second battery assembly 30 at the same time, thereby improving the assembly efficiency of the battery pack, and limiting The component 70 can correspond to the ventilation channel 40, so that the airflow in the ventilation channel 40 can quickly cool the first battery assembly 20 and the second battery assembly 30, thereby improving the safety performance of the battery pack.

A 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, along 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 it can ensure that the ventilation channel 40 has a sufficient length, so that the first battery assembly 20 and the second battery assembly 20 can be controlled. Reliable cooling of the second battery assembly 30 .

In one embodiment, as shown in FIGS. 2 to 5 , the battery pack further includes a stopper structure 50, and the stopper structure 50 is arranged on the upper part of the first battery assembly 20 and the second battery assembly 30 to block the ventilation 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, avoiding the diffusion of airflow in all directions, thereby speeding up the heat dissipation efficiency of the battery pack, thereby improving the battery life. The safe use performance of the package.

It should be noted that the first battery assembly 20 includes a plurality of first batteries 21 stacked along a first direction, the second battery assembly 30 includes a plurality of second batteries 31 stacked in a first direction, the first battery assembly 20 and the second battery assembly 20 A ventilation channel 40 is formed between the two battery assemblies 30 , so that the air flow can circulate in the ventilation channel 40 , so as to realize the temperature regulation of the first battery 21 and the second battery 31 . Since the stopper structure 50 is arranged on the upper part of the first battery assembly 20 and the second battery assembly 30, the upper opening of the ventilation channel 40 can be blocked, that is, the air flow will not flow from the first battery assembly 20 and the second battery assembly 30. The upper part circulates to fix the direction of airflow diffusion, which can make the flow direction of airflow relatively certain, thereby speeding up the heat dissipation efficiency of the battery pack, thereby improving the heat dissipation performance of the battery pack, thereby improving the safety performance of the battery pack.

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. A battery, on the other hand, consists of cells and electrolytes, the smallest unit capable of performing electrochemical reactions such as charging/discharging. The battery core refers to a unit formed by winding or laminating a stacked part, and the stacked part includes 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 a stacked battery, which is not only convenient for grouping, but also can be processed to obtain a battery with a long length. Specifically, the electric core is a laminated electric core, and the electric core has a first pole piece stacked on each other, a second pole piece electrically opposite to the first pole piece, and a pole piece arranged between the first pole piece and the second pole piece. The separator sheet, so that multiple pairs of the first pole piece and the second pole piece are stacked to form a laminated battery cell.

Optionally, the battery can be a wound battery, that is, the first pole piece, the second pole piece that is electrically opposite to the first pole piece, and the separator disposed between the first pole piece and the second pole piece are rolled winding to obtain a wound-type battery cell.

In one embodiment, at least part of the stop structure 50 extends along the first direction and is located between the first battery assembly 20 and the second battery assembly 30, so as to effectively block the upper opening of the ventilation channel 40, In this way, the sealing performance of the upper opening of the ventilation channel 40 is improved, so as to ensure that the air flow can circulate effectively in the ventilation channel 40, thereby improving the heat dissipation efficiency of the battery pack.

The opposite two of the stopper structures 50 can be in contact with the first battery assembly 20 and the second battery assembly 30 respectively, so that the upper opening of the ventilation channel 40 can be effectively sealed. And when the first battery assembly 20 and the second battery assembly 30 are stacked, the stop structure 50 can be used for the positioning of the first battery assembly 20 and the second battery assembly 30, thereby improving the first battery assembly 20 and the second battery assembly. The stacking efficiency of the assembly 30.

In one embodiment, the stop structure 50 extends along the first direction, and one end of the stop structure 50 is connected to the limit member 70, so as to effectively fix the stop structure 50, and can make the stop structure 50 and the limit The position pieces 70 all form a blockage to the ventilation channel 40, which can improve the cooling performance of the airflow to a certain extent.

In one embodiment, as shown in FIG. 4 , the battery pack further includes a fixed end plate 60, the fixed end plate 60 is arranged in the battery case 10, and is located at one end of the first battery assembly 20 and the second battery assembly 30, so as to The fixed end plate 60 and the first battery assembly 20 are arranged along the first direction; wherein, the two ends of the stop 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 FIG. 7 , the limiting member 70 is blocked at the end opening of the ventilation channel 40 , and the limiting member 70 is provided with a vent 72 , and the vent 72 is connected to the ventilation channel 40 are communicated, so that the airflow can enter the ventilation channel 40 through the vent 72, so as to realize effective cooling of the first battery 21 and the second battery 31 located at the end.

A space for air flow will be formed between the support beam 90 and the first end plate 12. Therefore, a vent 72 is provided on the stopper 70 to facilitate the entry of gas from the rear side, and then pass through the vent 72 to the first air flow at the rear end. The battery 21 and the second battery 31 are cooled.

In one embodiment, there are a plurality of vents 72, and the sum of the areas of the plurality of vents 72 occupies 5%-15% of the area of the side of the limiter 70 facing the ventilation flow channel 40, ensuring that the first battery 21 On the basis that a large amount of airflow can enter between the second battery 31 , the airflow can also enter the ventilation channel 40 through the vent 72 to realize cooling of the first battery 21 and the second battery 31 at the rear end.

In one embodiment, as shown in FIGS. 2 and 3 , a first flow channel 22 is formed between adjacent first batteries 21 , and the first flow channel 22 communicates with the ventilation flow channel 40 . A second flow channel 32 is formed, and the second flow channel 32 communicates with the ventilation flow channel 40, that is, the air flow can circulate through the first flow channel 22, the second flow channel 32 and the ventilation flow channel 40 inside the battery pack, thereby adjusting The internal temperature of the battery pack can be realized, and the effective heat dissipation of the first battery 21 and the second battery 31 can be realized, so as to improve the safe use performance of the battery pack and avoid problems such as thermal runaway inside the battery pack.

The air flow can enter the ventilation flow channel 40 from the first flow channel 22 and the second flow channel 32, and the limiting member 70 and the stopper structure 50 can realize partial sealing of the ventilation flow channel 40, that is to ensure that a large amount of air flow is basically provided by the first flow channel. The first flow channel 22 and the second flow channel 32 enter the ventilation flow channel 40, so that the efficient heat dissipation of the first battery 21 and the second battery 31 can be realized through the surface of the first battery 21 and the second battery 31, and within a limited Vents 72 are provided on the position member 70 to facilitate gas entering from the rear side, and then cool the first battery 21 and the second battery 31 at the rear through the vents 72 .

Further, the sum of the areas of the plurality of ventilation openings 72 occupies 5%-15% of the area of the limiting member 70 facing the side of the ventilation channel 40. If the area of the ventilation openings 72 is too large, the first flow channel 22 and the second flow channel The air flow from the passage 32 into the ventilation flow passage 40 will be reduced, which is not conducive to the heat dissipation of the first battery assembly 20 and the second battery assembly 30 . The area of the ventilation opening 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, but in this embodiment, the sum of the areas of the plurality of ventilation openings 72 occupies 5%-15% of the area of one side of the ventilation channel 40 can reduce the temperature difference of the first battery assembly 20 or the second battery assembly 30, so as to ensure the safe use of the battery pack.

The sum of the areas of the plurality of vents 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%, or 15%, etc.

In one embodiment, as shown in FIG. 1 , the battery case 10 is provided with a plurality of ventilation holes 14 through which external airflow can enter the interior of the battery case 10 , so as to realize the ventilation of the inside of the battery pack. Reliable heat dissipation.

As shown in FIG. 1 , the battery case 10 further includes a cover plate 15 connected to the first end plate 12 and the second end plate 13 , and a plurality of ventilation holes 14 may be provided on the cover plate 15 .

In one embodiment, as shown in FIG. 4 , the battery pack further includes a fan 100, the fan 100 is disposed on the battery case 10, and the air inlet of the fan 100 is connected to the end of the ventilation channel 40 away from the limiter 70, so that Through the operation of the blower 100 , the air flow circulates inside the battery pack, so as to realize the adjustment of the internal temperature of the battery pack. The fan 100 can be a fan, an air conditioner, etc., and is not limited here. The fan 100 can be fixed on the fixed end plate 60 , or the fan 100 can be fixed on the battery box 10 . The battery case 10 needs to be provided with a through hole for the air flow out of the battery case 10 .

During the operation of the blower 100, the airflow outside the battery pack can enter the interior of the battery case 10 through the ventilation holes 14, and enter the ventilation flow passage 40 through the first flow passage 22, the second flow passage 32 and the ventilation opening 72. During this process In this process, the airflow can cool the first battery 21 and the second battery 31, and finally the airflow is discharged to the outside of the battery pack through the air outlet of the fan 100, so that the heat inside the battery pack can be taken away by the gas flow, thereby improving The safe use performance of the battery pack.

In one embodiment, the battery case 10 includes: a bottom plate 11; a first end plate 12; a second end plate 13, the first end plate 12 and the second end plate 13 are disposed on opposite sides of the bottom plate 11 along a first direction Wherein, a chamber is formed between the limiting member 70 and the first end plate 12, the chamber communicates with the ventilation channel 40, and the first end plate 12 is provided with a ventilation hole 14, so that the airflow can be passed through the ventilation hole 14 into the cavity, and from the cavity into the ventilation channel 40, thereby achieving reliable heat dissipation of the first battery assembly 20 and the second battery assembly 30.

In one embodiment, the limiting member 70 is provided with a vent 72, and the chamber communicates with the ventilation channel 40 through the vent 72, so as to improve the flow capacity of the airflow, and further improve the flow of the airflow to the first battery assembly 20 and the second battery assembly 20. The heat dissipation efficiency of the battery pack 30 .

As shown in FIG. 5, a ventilation channel 40 is formed between the first battery assembly 20 and the second battery assembly 30. As shown in FIG. 70 has a receiving groove 71 on the side facing the first end plate 12. At this time, as shown in FIG. A chamber can be formed in the room, and the chamber can communicate with the ventilation channel 40 through a plurality of vents 72 . The airflow can enter the chamber surrounded by the first end plate 12 and the limiting member 70 through the ventilation hole 14 on the side of the first end plate 12, and then enter the ventilation channel 40 through the vent 72 on the limiting member 70, so Heat exchange can also be performed on the battery at the end to avoid the problem of uneven heat distribution, thereby improving the heat dissipation capacity of the battery pack.

An embodiment of the present invention also provides a battery cluster, including the above-mentioned battery pack.

The battery cluster in one embodiment of the present invention includes a battery pack, and the battery pack includes a battery case 10 , a first battery assembly 20 and a limiting member 70 , and both the first battery assembly 20 and the limiting member 70 are disposed in the battery case 10 . By setting the limiting member 70 in the battery box 10, when the first battery assembly 20 is stacked, the limiting member 70 can realize the limiting of the first battery 21 of the first battery assembly 20, so as to facilitate the first The stacking of battery assemblies 20 improves the efficiency of loading the first battery assembly 20 into the battery case 10, and the length occupied by the limiting member 70 is not greater than the length occupied by the two first batteries 21, that is, the length occupied by the limiting member 70 The space will not be too large, so as to avoid the problem of excessive weight of the limiting member 70, so as to reduce the overall weight of the battery pack. The limiting member 70 can not only limit the stacking of the first battery assembly 20, but also not increase the weight of the battery pack too much, thereby improving the assembly efficiency of the battery cluster.

In one embodiment, as shown in FIG. 8 , the battery cluster includes a frame 1, and the battery pack 2 is arranged on the frame 1. The frame 1 can form a flow channel communicated with the ventilation hole 14, so that the inside of the battery pack 2 can Gas flow is formed between the rack 1 to ensure efficient heat dissipation of the battery pack 2, thereby improving the safe use performance of the battery pack.

The frame 1 can be formed with a storage compartment, and the battery pack can be arranged in the storage compartment, and the battery pack can communicate with the storage compartment through the ventilation hole 14 . The battery cluster may include multiple battery packs, and the multiple battery packs may be arranged on the rack.

Other embodiments of the present disclosure will readily occur 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 modification, use or adaptation of the present invention, these modifications, uses or adaptations follow the general principles of this disclosure and include common knowledge or conventional technical means in the technical field not disclosed in this disclosure . The specification and example embodiments are to be considered as exemplary only, with the true scope and spirit of the disclosure indicated by the appended claims.

It should be understood that the present disclosure is not limited to the precise constructions which have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of protection of the present disclosure is limited only by the appended claims.

Claims (18)

1. A battery pack, characterized in that, comprising: battery box (10); A first battery assembly (20), the first battery assembly (20) is arranged in the battery box (10), and the first battery assembly (20) includes a plurality of first batteries stacked along a first direction (twenty one); A limiting member (70), the limiting member (70) is arranged in the battery box (10), the first battery assembly (20) and the limiting member (70) are arranged along a second direction , so that the stopper (70) is in contact with the first battery (21) at the end of the first battery assembly (20), the first direction is substantially perpendicular to the second direction, and the 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 the bottom surface of the battery box (10); The second battery assembly (30), the second battery assembly (30) is arranged in the battery box (10), and the second battery assembly (30) includes a plurality of first batteries stacked along the first direction The second battery (31), the first battery assembly (20), the stopper (70) and the second battery assembly (30) are arranged along the second direction, and the first battery assembly (20 ) and the second battery assembly (30) form a ventilation channel (40), and the limiter (70) is in phase with the second battery (31) at the end of the second battery assembly (30) contact; the limiter (70) is blocked at the end opening of the ventilation channel (40), and a first channel (22) is formed between adjacent first batteries (21), and the first The first channel (22) communicates with the ventilation channel (40), and a second channel (32) is formed between the adjacent second battery (31), and the second channel (32) is connected to the The above-mentioned ventilation channel (40) is connected; A stop structure (50), the stop structure (50) is arranged on the upper part of the first battery assembly (20) and the second battery assembly (30), so as to block the ventilation channel (40) The upper opening of the upper part; wherein, the stop structure (50) extends along the first direction, and one end of the stop structure (50) is connected to the limiting member (70); Wherein, along the first direction, the length occupied by the limiting member (70) is not greater than the length occupied by the two first batteries (21). 2. The battery pack according to claim 1, characterized in that, along the first direction, the length occupied by the limiting member (70) is not greater than the length occupied by one of the first batteries (21). 3. The battery pack according to claim 2, characterized in that, along the first direction, the length occupied by the limiting member (70) is not more than half of the length occupied by the first battery (21) . 4. The battery pack according to claim 1, characterized in that, along the third direction, the height of the limiting member (70) is not greater than the height of the first battery (21); Wherein, along the third direction, the top end of the limiting member (70) does not exceed the top end of the first battery (21). 5. The battery pack according to claim 4, characterized in that, the battery pack further comprises a fixed beam (80), the fixed beam (80) is arranged on the battery box (10), and the fixed beam (80) extending along the first direction, so that the fixing beam (80) is in contact with the first battery assembly (20); Wherein, the limiting member (70) is connected to the fixed beam (80), and along the third direction, the height of the fixed beam (80) is smaller than the height of the first battery (21). 6. The battery pack according to claim 5, characterized in that, the spacer (70) is insulated from the first battery assembly (20), and/or the fixing beam (80) Insulated from the first battery assembly (20). 7. The battery pack according to claim 6, characterized in that at least one of the limiting member (70) and the fixing beam (80) is provided with an insulating layer; Wherein, the limiting member (70) and the fixing beam (80) are welded. 8. The battery pack according to claim 1, characterized in that, the battery pack further comprises a support beam (90), the support beam (90) is arranged on the battery box (10), and the support beam (90) extends along the second direction, so that the end of the first battery assembly (20) and the limiting member (70) are in contact with the support beam (90) at the same time. 9. The battery pack according to Claim 8, characterized in that, along the third direction, the support beam (90) is in contact with a middle part of the limiting member (70). 10. The battery pack according to claim 9, characterized in that, the limiting member (70) is provided with a vent (72), and the support beam (90) faces toward the position of the limiting member (70) The orthographic projection of the plane does not coincide with said vent (72). 11. The battery pack according to claim 8, characterized in that, the battery case (10) comprises: bottom plate (11); first end plate (12); The second end plate (13), the first end plate (12) and the second end plate (13) are arranged on opposite sides of the bottom plate (11) along the first direction, and the support beam (90) connected to the first end plate (12); Wherein, the first end plate (12) forms an accommodation space, and the support beam (90) is located in the accommodation space. 12. The battery pack according to claim 11, characterized in that, the bottom plate (11) and the first end plate (12) are integrally formed, and the bottom plate (11) and the first end plate Plate (12) is a sheet metal part. 13. The battery pack according to claim 1, characterized in that, the limiting member (70) is provided with a vent (72), and the vent (72) is connected to the ventilation channel (40) Pass. 14. The battery pack according to claim 13, characterized in that there are a plurality of vents (72), and the sum of the areas of the vents (72) occupies the orientation of the limiting member (70). 5%-15% of the area of one side of the ventilation channel (40). 15. The battery pack according to claim 13, characterized in that, the battery case (10) is provided with a plurality of ventilation holes (14). 16. The battery pack according to claim 13, characterized in that, the battery pack further comprises a fan (100), the fan (100) is arranged in the battery case (10), and the fan (100) The air inlet of the air inlet communicates with the end of the ventilation channel (40) away from the limiting member (70). 17. The battery pack according to claim 1, characterized in that, the battery case (10) comprises: bottom plate (11); first end plate (12); A second end plate (13), the first end plate (12) and the second end plate (13) are arranged on opposite sides of the bottom plate (11) along the first direction; Wherein, a cavity is formed between the limiting member (70) and the first end plate (12), the cavity communicates with the ventilation channel (40), and the first end plate ( 12) is provided with ventilation holes (14). 18. The battery pack according to claim 17, wherein a vent (72) is provided on the limiting member (70), and the chamber communicates with the ventilation flow through the vent (72) Road (40) is connected.

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