CN218887318U - Battery pack - Google Patents

Abstract

The utility model relates to a battery technology field provides a battery pack, include: the battery box body comprises a bottom plate and a frame, the frame is arranged on the bottom plate and is enclosed to form an accommodating space, and the accommodating space comprises a middle area and an edge area arranged around the middle area; the batteries are arranged in the accommodating space; at least one of a heat insulating member and a heat conducting member, the heat insulating member being disposed opposite the battery, and at least a portion of an orthographic projection of the heat insulating member toward the base plate being located in the edge region, the heat conducting member being in contact with the battery, and at least a portion of an orthographic projection of the heat conducting member toward the base plate being located in the middle region. The battery in the edge area is arranged opposite to the heat insulation piece, so that the heat dissipation capacity of the battery in the edge area can be reduced, the battery in the middle area is in contact with the heat conduction piece, the heat dissipation capacity of the battery in the middle area can be improved, the temperature difference of each position area of the battery pack cannot be too high, and the use performance of the battery pack is improved.

Description

Battery pack

Technical Field

The utility model relates to a battery technology field especially relates to a battery package.

Background

In the related art, in the use process of the battery pack, due to the influence of environmental factors or the overall structure of the battery pack, the temperature inside the battery pack is not very balanced, and under certain conditions, the problem of large temperature deviation may occur, so that the normal use of the battery pack is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery pack to improve the performance of battery pack.

The utility model provides a battery pack, include:

the battery box body comprises a bottom plate and a frame, the frame is arranged on the bottom plate and is enclosed to form an accommodating space, and the accommodating space comprises a middle area and an edge area arranged around the middle area;

the batteries are arranged in the accommodating space;

at least one of a heat insulating member and a heat conducting member, the heat insulating member being disposed opposite the battery, and at least a portion of an orthographic projection of the heat insulating member toward the base plate being located in the edge region, the heat conducting member being in contact with the battery, and at least a portion of an orthographic projection of the heat conducting member toward the base plate being located in the middle region.

The utility model discloses battery pack includes the battery box, at least one among a plurality of batteries and heat insulating part and the heat-conducting piece, a plurality of batteries set up in the accommodation space of battery box, and through dividing accommodation space into middle zone and the marginal zone that sets up around middle zone, and the concentrated heat of battery that is located middle zone can be greater than the concentrated heat of battery that is located marginal zone, can lead to the unbalanced problem of the inside heat of battery pack, set up with the heat insulating part relatively through making the battery of marginal zone, thereby can reduce the heat-sinking capability of the battery that is located marginal zone, and/or, make middle zone's battery and heat-conducting piece contact, thereby can improve the heat-sinking capability of the battery that is located middle zone, from this can make the regional temperature difference in each position of battery pack can not be too high, from this improve the performance of battery pack.

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 in order 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 schematic diagram illustrating a structure of a battery pack according to an exemplary embodiment;

fig. 2 is a schematic view illustrating an internal structure of a battery pack according to an exemplary embodiment;

FIG. 3 is a schematic diagram illustrating a partial structure of a battery pack according to an exemplary embodiment;

fig. 4 is a schematic structural view illustrating a bottom plate and a frame of a battery pack according to an exemplary embodiment.

The reference numerals are explained below:

10. a battery case; 11. a base plate; 12. a frame; 13. an accommodating space; 131. a middle region; 132. an edge region; 14. a top cover; 20. a battery; 21. a conductive connection member; 30. a thermal insulation member; 31. a lateral end portion; 32. a tip portion; 40. a heat conducting member.

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, so it should 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 as a specific case by a person skilled in the art.

Further, in the description of the present disclosure, it is to 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 the context of a connection between one element or feature and another element(s), "on," "under," or "inside" or "outside," it can be directly connected to the other element(s) "on," "under" or "inside" or "outside," or indirectly connected to the other element(s) "on," "under" or "inside" or "outside" through intervening elements.

An embodiment of the present invention provides a battery pack, please refer to fig. 1 to 4, the battery pack includes: the battery box body 10, the battery box body 10 includes a bottom plate 11 and a frame 12, the frame 12 is disposed on the bottom plate 11 and encloses an accommodating space 13, and the accommodating space 13 includes a middle area 131 and an edge area 132 disposed around the middle area 131; a plurality of batteries 20, the plurality of batteries 20 being disposed in the accommodating space 13; at least one of a heat insulating member 30 and a heat conducting member 40, the heat insulating member 30 being disposed opposite to the battery 20, and at least a part of an orthogonal projection of the heat insulating member 30 toward the bottom plate 11 being located in the edge region 132, the heat conducting member 40 being in contact with the battery 20, and at least a part of an orthogonal projection of the heat conducting member 40 toward the bottom plate 11 being located in the middle region 131.

The battery pack according to an embodiment of the present invention includes a battery case 10, a plurality of batteries 20, at least one of a heat insulating member 30 and a heat conducting member 40, wherein the plurality of batteries 20 are disposed in the accommodating space 13 of the battery case 10, and the accommodating space 13 is divided into a middle region 131 and an edge region 132 disposed around the middle region 131, and the heat concentrated by the batteries 20 located in the middle region 131 is greater than the heat concentrated by the batteries 20 located in the edge region 132, which may cause the problem of the imbalance of the internal heat of the battery pack, and the batteries 20 located in the edge region 132 are disposed opposite to the heat insulating member 30, so that the heat dissipation capability of the batteries 20 located in the edge region 132 can be reduced, and/or the batteries 20 located in the middle region 131 are in contact with the heat conducting member 40, so that the heat dissipation capability of the batteries 20 located in the middle region 131 can be improved, so that the temperature difference of each position region of the battery pack is not too high, thereby improving the usability of the battery pack.

It should be noted that, a plurality of batteries 20 may be disposed in the battery box 10, because the batteries 20 are disposed at different positions or are limited by environmental factors, the outward heat dissipation capacities of the batteries 20 in different regions are also different, for example, the low-temperature standing working condition is a working condition that usually occurs at a vehicle user end in winter, and under the low-temperature standing working condition, the environmental temperature is low, the batteries 20 around the battery pack are close to the external environment, and heat is easily dissipated through the battery box 10, so that the temperature of the batteries 20 around the periphery is low, that is, the temperature of the batteries 20 in the edge region 132 is low, and the heat dissipation area of the batteries 20 in the middle region 131 is small, and the temperature is high, thereby causing an excessive temperature difference of the battery pack after the low-temperature standing working condition. Under the working condition of low-temperature standing, the temperature difference is large, so that a series of problems of prolonged charging time of the client after standing, low driving power limit, poor consistency of the battery 20 and the like are caused, and finally, the performance of the battery is weakened, the service life is shortened, and the use experience of the client is poor.

In this embodiment, the battery pack may include at least one of the heat insulating member 30 and the heat conductive member 40, that is, the battery pack may include the heat insulating member 30 and not include the heat conductive member 40, or the battery pack may include the heat conductive member 40 and not include the heat insulating member 30, or the battery pack may include both the heat insulating member 30 and the heat conductive member 40.

The heat insulating member 30 is disposed opposite to the battery 20, and at least a portion of the orthographic projection of the heat insulating member 30 toward the bottom plate 11 is located on the edge region 132, that is, the heat insulating member 30 can provide a heat insulating effect on the battery 20, and reduce the heat dissipation amount of the battery 20 in the edge region 132. The heat-conducting member 40 is in contact with the battery 20, and at least a portion of the orthographic projection of the heat-conducting member 40 toward the bottom plate 11 is located in the middle area 131, that is, the heat-conducting member 40 can accelerate the heat dissipation of the battery 20, and the heat dissipation capacity of the battery 20 in the middle area 131 is improved.

In this embodiment, at least one of the thermal insulating member 30 and the thermal conductive member 40 is provided, so that the temperature difference between the cells 20 in the middle region 131 and the cells 20 in the edge region 132 is finally low, for example, the temperature of the cells 20 in the edge region 132 is T1, the temperature of the cells 20 in the middle region 131 is T2, | T1-T2| ≦ 10 ℃, i.e., the temperature inside the battery pack is relatively good, and thus the service performance, safety performance, service life and the like of the battery pack can be improved. Or the temperature of the battery 20 in the edge region 132 is T1, the temperature of the battery 20 in the middle region 131 is T2, | T1-T2| ≦ 5 ℃.

The temperature of the battery 20 in the edge region 132 and the battery 20 in the middle region 131 can be collected by a plurality of temperature collectors, which are not limited herein.

As shown in fig. 4, the frame 12 is disposed on the bottom plate 11 and encloses the accommodating space 13, the accommodating space 13 includes a middle area 131 and an edge area 132 disposed around the middle area 131, the middle area 131 is a middle portion of the accommodating space 13, and the edge area 132 is an edge portion of the accommodating space 13.

The receiving space 13 may be a large space, or the receiving space 13 may be a sub-space divided by a plurality of partition beams. However, when the accommodating space 13 is divided into the middle area 131 and the edge area 132, the accommodating space 13 is divided into a whole large space without being intentionally divided into a plurality of subspaces.

At least part of the orthographic projection of the thermal insulation 30 toward the bottom panel 11 is located in the edge region 132, in which case at least part of the thermal insulation 30 may be located in the edge region 132, for example, when the thermal insulation 30 is located on top of the battery 20, the height of the battery 20 is lower than the frame 12, and thus the thermal insulation 30 may also be located in the edge region 132; alternatively, the thermal insulation member 30 may not be located in the edge region 132, for example, when the thermal insulation member 30 is located on the top of the battery 20, the height of the battery 20 is higher than the frame 12, and therefore, the thermal insulation member 30 may not be located in the accommodating space 13, but at least a part of the orthographic projection of the thermal insulation member 30 toward the bottom plate 11 is located in the edge region 132.

Accordingly, at least a portion of the orthographic projection of the heat-conducting member 40 toward the bottom plate 11 is located in the middle area 131, and at least a portion of the heat-conducting member 40 may be located in the middle area 131, for example, when the heat-conducting member 40 is located on the top of the battery 20, the height of the battery 20 is lower than the frame 12, and therefore, the heat-conducting member 40 may also be located in the middle area 131; alternatively, the heat-conducting member 40 may not be located in the middle region 131, for example, when the heat-conducting member 40 is located on the top of the battery 20, the height of the battery 20 is higher than that of the frame 12, and therefore, the heat-conducting member 40 may not be located in the middle region 131, but at least a part of the orthographic projection of the heat-conducting member 40 toward the bottom plate 11 is located in the middle region 131.

The accommodation space 13 includes a middle region 131 and an edge region 132 disposed around the middle region 131, where the middle region 131 and the edge region 132 each represent a three-dimensional space.

In one embodiment, the thermal shield 30 may be in contact with the battery 20, for example, the thermal shield 30 may be in direct contact with the battery 20, or the thermal shield 30 may be in contact with the battery 20 through other components.

In one embodiment, the thermal shield 30 may not be in contact with the battery 20, for example, the thermal shield 30 may have a gap with the battery 20, for example, the thermal shield 30 may be disposed on the bezel 12, and/or the thermal shield 30 may be disposed on the top cover 14.

In one embodiment, the ratio of the area of the central region 131 orthographically projected toward the base plate 11 to the area of the edge region 132 orthographically projected toward the base plate 11 is 0.1 to 1, thereby controlling the sizes of the thermal insulating member 30 and the thermal conductive member 40.

Optionally, the ratio of the area of the middle region 131 orthographically projected towards the bottom plate 11 to the area of the edge region 132 orthographically projected towards the bottom plate 11 is 0.2-0.5.

The ratio of the area of the central region 131 orthographically projected towards the base plate 11 to the area of the edge region 132 orthographically projected towards the base plate 11 may be 0.1, 0.11, 0.2, 0.22, 0.25, 0.3, 0.4, 0.45, 0.5, 0.51, 0.52, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 0.98, or 1, etc.

The linear distances of the positions of the circumferential edge of the middle region 131 from the frame 12 may be equal, i.e. the width dimensions of the positions of the edge region 132 may be equal, or the linear distances of the positions of the circumferential edge of the middle region 131 from the frame 12 may be at least partially unequal, i.e. the width dimensions of the positions of the edge region 132 may be at least partially non-equal.

In one embodiment, the accommodating space 13 is a rectangular cavity, and at least a part of the orthographic projection of the heat insulating member 30 towards the bottom plate 11 is located in a corner region of the accommodating space 13, i.e. the heat insulating member 30 can achieve heat insulating protection for the battery 20 in the corner region, thereby avoiding excessive heat dissipation of the battery 20 in the corner region.

The receiving space 13 is a rectangular cavity, and the rectangular cavity is not limited to a standard rectangular cavity, and may have certain corners, and the like, and is not limited herein.

Whereas the corner regions of the rectangular cavity may include 4, i.e. four corner positions of the rectangular cavity, the heat dissipation capability of the battery 20 in the corner regions of the accommodating space 13 will be relatively strong, and therefore, at least part of the orthographic projection of the heat insulating member 30 towards the bottom plate 11 is located in the corner regions of the accommodating space 13, thereby maximally achieving heat insulation protection for the battery 20.

In one embodiment, as shown in fig. 3, the thermal insulation member 30 includes side end portions 31, and the side end portions 31 are located between the frame 12 and the battery 20, so that the heat transfer capability between the battery 20 and the frame 12 can be reduced, thereby avoiding the problem of the battery 20 in the edge region 132 having too low a temperature.

In one embodiment, as shown in fig. 3, the thermal insulation member 30 further includes a top portion 32, and the top portion 32 is located on the top of the battery 20, so that the top portion 32 can insulate the top of the battery 20, and reduce the amount of heat dissipated from the top of the battery 20, thereby ensuring that the temperature of the battery 20 in the edge region 132 is within a normal range.

Although the top of the battery 20 in the edge region 132 is not in contact with the frame 12 or the partition member, air may flow on the top of the battery 20, and the air may flow in the space due to the temperature unevenness in the battery pack, so that the heat at the top of the battery 20 near the corner region is easily taken away by the frame 12 or the partition member by thermal convection, and in this embodiment, the top portion 32 is provided on the top of the battery 20, thereby keeping the temperature of the battery 20.

In one embodiment, as shown in fig. 1, the battery case 10 further includes a top cover 14, and the top cover 14 is connected to the frame 12, so as to form a closed protection for the battery pack.

The top portion 32 may be located between the battery 20 and the top cover 14, wherein the top portion 32 is in contact with the top cover 14, i.e., the space between the battery 20 and the top cover 14 may be minimized, thereby preventing air flow from carrying heat away from the battery 20 at the edge region 132.

In one embodiment, the top portion 32 is compressible, and the amount of compression of the top portion 32 is 20% -30%, i.e. the top portion 32 is compressed after the top cover 14 is installed, so that the top portion 32 can not only form the thermal protection for the battery 20, but also form the fixation for the battery 20, and the stability of the battery 20 can be improved to a certain extent.

In one embodiment, as shown in fig. 2 and 3, the top portion 32 is an L-shaped structure, i.e., the top portion 32 can reliably cover the battery 20 in the corner area, thereby maximizing the thermal protection of the battery 20.

As shown in fig. 3, the thermal insulation member 30 may include a side end portion 31 and a top end portion 32, the side end portion 31 may be located between the frame 12 and the battery 20, and the side end portion 31 may extend in a direction perpendicular to the large surface of the battery 20, i.e., the side end portion 31 may cover the ends of the plurality of batteries 20 at the same time.

The top portion 32 may be located between the top cover 14 and the batteries 20, the top portion 32 is of an L-shaped structure, a portion of the top portion 32 extends in a direction perpendicular to the large surface of the batteries 20, another portion of the top portion 32 extends in a direction parallel to the large surface of the batteries 20, and a portion of the top portion 32 covers the batteries 20 at the same time, while another portion of the top portion 32 covers the batteries 20 at the same time.

In one embodiment, the thermal conductivity of the thermal insulation member 30 is < 0.1W/(m · K), so that the thermal conductivity of the thermal insulation member 30 can be made lower, thereby improving the heat retaining capability of the thermal insulation member 30.

The heat insulating member 30 may be made of heat insulating cotton, or the heat insulating member 30 may be made of heat insulating tape or the like.

In one embodiment, the heat insulating member 30 is provided in plurality, and the plurality of heat insulating members 30 are spaced apart from each other, so that the plurality of heat insulating members 30 can protect different regions of each battery 20 in the battery pack from heat, thereby maximizing the temperature equalization inside the battery pack.

As shown in fig. 2 and 3, the number of the heat insulation members 30 may be 4, and 4 heat insulation members 30 may be respectively disposed at corner regions of the accommodating space 13, thereby forming heat insulation for the corresponding batteries 20, and thus avoiding the problem of excessive temperature difference inside the battery pack.

In one embodiment, the thermal conductor 40 is located on top of the battery 20, the battery case 10 further includes a top cover 14, the top cover 14 is connected to the frame 12, and the thermal conductor 40 is located between the top cover 14 and the battery 20; the heat conducting member 40 is in contact with the top cover 14, so that the battery 20 can transfer heat to the top cover 14 through the heat conducting member 40, high-speed heat dissipation of the battery 20 is achieved, and excessive temperature difference inside the battery pack is avoided.

It should be noted that the top cover 14 of the battery box 10 only has a protection function, or the top cover 14 of the battery box 10 may have a heat exchange function, for example, the top cover 14 may be integrated with a heat exchange structure, so as to heat or dissipate heat of the battery 20.

In some embodiments, it is not excluded that the battery pack may not include the top cover 14, or the top cover 14 may be replaced with the chassis of the vehicle, without limitation.

In one embodiment, as shown in fig. 2 and 3, the heat conduction member 40 is provided in plurality, and the plurality of heat conduction members 40 are arranged at intervals, so as to form rapid heat dissipation for the plurality of batteries 20, thereby ensuring that the temperature of the batteries 20 located in the middle region 131 can be reduced, and ensuring that the temperature difference of the batteries 20 inside the battery pack is not too large.

In one embodiment, the plurality of heat conduction members 40 are arranged at intervals along the length direction of the battery 20, so that the battery 20 is cooled without causing a problem of excessive cooling.

In one embodiment, a length of the heat-conducting member 40 of the plurality of heat-conducting members 40 close to the central axis of the accommodating space 13 is greater than a length of the heat-conducting member 40 away from the central axis of the accommodating space 13, and/or a width of the heat-conducting member 40 of the plurality of heat-conducting members 40 close to the central axis of the accommodating space 13 is greater than a width of the heat-conducting member 40 away from the central axis of the accommodating space 13. The temperature of the battery 20 at the central axis of the receiving space 13 may be relatively high, and thus, a large area of the heat conductive member 40 is required to achieve heat transfer, thereby minimizing the temperature difference inside the battery pack.

The central axis of the accommodating space 13 may be regarded as a line passing through the central point of the accommodating space 13, for example, the accommodating space 13 is a rectangular body, in this case, the central axis of the accommodating space 13 may be two, the intersection point of the central axes of the two accommodating spaces 13 forms the central point of the accommodating space 13, for example, the plurality of heat conduction members 40 are arranged at intervals along the length direction of the battery 20; for example, one heat conduction member 40 may be located on the central axis of the accommodating space 13 along the length direction of the battery 20, in which case the length and/or width of the heat conduction member 40 may be greater than those of the other heat conduction members 40, or two heat conduction members 40 may be located on both sides of the central axis of the accommodating space 13 along the length direction of the battery 20, in which case the length and/or width of the two heat conduction members 40 may be greater than those of the other heat conduction members 40.

It should be noted that the overall thickness of the heat-conducting member 40 may be uniform, or the overall thickness of the heat-conducting member 40 may be non-uniform, which is not limited herein.

In one embodiment, at least a part of the orthographic projection of the heat-conducting member 40 towards the bottom plate 11 is located in the central area of the bottom plate 11, so that heat dissipation to the batteries 20 in the central area can be realized, and after all, the heat accumulation of the batteries 20 in the central area can be relatively large, so that the internal temperature of the battery pack can be balanced.

The central region of the bottom plate 11 may be regarded as the very central region of the middle region 131 where heat concentration of the battery 20 is most severe.

In one embodiment, the extending direction of the heat conducting member 40 is perpendicular to the large surface of the battery 20, and the heat conducting member 40 is in contact with the plurality of batteries 20, so that the plurality of batteries 20 can be protected by heat dissipation, the temperature of the batteries 20 can be reduced, and the problem of excessive temperature difference inside the battery pack can be avoided.

In one embodiment, as shown in fig. 3, the battery 20 is provided with the conductive connection member 21, the heat conduction member 40 is in contact with the conductive connection member 21, so that the heat transfer efficiency can be improved, and the heat generation on the conductive connection member 21 can be relatively high, so that the heat dissipation capability of the battery 20 can be improved.

The conductive connecting member 21 may be a bus bar for electrically connecting at least two batteries 20, or the conductive connecting member 21 may be a pole assembly of the battery 20, which is not limited herein, and heat generation at the conductive connecting member 21 may be large, so that the heat dissipation capability of the battery 20 may be improved by bringing the heat conductive member 40 into contact with the conductive connecting member 21.

In one embodiment, the thermal conductivity of the thermal conductive member 40 is more than 1W/(m · K), i.e., the thermal conductivity of the thermal conductive member 40 is relatively high, so that the heat dissipation capability of the battery 20 can be improved.

The thermal conductive member 40 may be a thermal conductive pad, and the thermal conductive member 40 may be a thermal conductive material in the related art, for example, the thermal conductive member 40 may include a graphene sheet, a thermal conductive silicone grease, and the like, which is not limited herein.

It should be noted that the heat conduction member 40 may be directly disposed on the conductive connection member 21, or a high temperature adhesive tape may be disposed on the conductive connection member 21, and the heat conduction member 40 is in contact with the conductive connection member 21 through the high temperature adhesive tape.

In one embodiment, the battery pack further comprises a support located on top of the battery 20, the support being in contact with the battery 20, at least part of the orthographic projection of the support towards the base plate 11 being located in the edge region 132; the thermal conductivity coefficient of the supporting element is less than 0.1W/(m.K), namely, the supporting element can also form a heat preservation function for the battery 20, reduce the temperature loss of the battery 20 and avoid the problem of overhigh temperature difference inside the battery pack.

In one embodiment, the supporting members are multiple, the supporting members are arranged at intervals, the extending direction of the supporting members is perpendicular to the large surface of the battery, and the supporting members are in contact with the batteries to realize the heat preservation effect on the batteries 20.

The plurality of supports may be spaced apart along the length of the battery 20, the supports may form a thermal insulation to the top of the battery 20, and the supports may be thermal insulation cotton.

In one embodiment, the battery 20 is provided with the conductive connecting member 21, and the supporting member is in contact with the conductive connecting member 21, i.e. the supporting member can reduce heat dissipation of the conductive connecting member 21, thereby increasing the temperature of the battery 20 at the edge region 132.

The conductive connecting member 21 may be a bus bar for electrically connecting at least two batteries 20, or the conductive connecting member 21 may be a pole assembly of the batteries 20, which is not limited herein, and heat generation at the conductive connecting member 21 may be large, so that by contacting the supporting member with the conductive connecting member 21, a problem of excessive heat dissipation of the batteries 20 may be avoided.

It should be noted that the supporting member may be directly disposed on the conductive connecting member 21, or a high temperature adhesive tape may be disposed on the conductive connecting member 21, and the supporting member is in contact with the conductive connecting member 21 through the high temperature adhesive tape. Accordingly, the top end portion 32 of the heat insulating member 30 may be directly disposed on the conductive connecting member 21, or a high temperature adhesive tape may be disposed on the conductive connecting member 21, and the heat insulating member 30 is in contact with the conductive connecting member 21 through the high temperature adhesive tape.

It should be noted that the large surface of the battery 20 may be regarded as the surface where the area of the battery 20 is the largest, and further, the large surface of the battery 20 may be regarded as the surface where the heat generated by the battery 20 is the largest, for example, the battery 20 is a quadrangular prism type battery, in which case, the quadrangular prism type battery may include two opposite large surfaces, and the stacking direction of the plurality of batteries 20 may be perpendicular to the large surfaces of the batteries 20, that is, the large surfaces of two adjacent batteries 20 are oppositely disposed.

Note that the battery 20 includes a cell and an electrolyte, and is a minimum unit capable of performing an electrochemical reaction such as charging/discharging. The battery cell refers to a unit formed by winding or laminating a stack portion including a positive electrode sheet, a separator, and a negative electrode sheet. And when the positive pole piece is the positive pole piece, the negative pole piece is the negative pole piece. The polarity of the positive pole piece and the polarity of the negative pole piece can be interchanged. And the positive pole piece and the negative pole piece are coated with active substances.

In one embodiment, the battery 20 may be a prismatic battery, that is, the battery 20 may be a prismatic battery, which mainly refers to a prismatic battery having a shape of a prism, but does not strictly limit whether each side of the prism is a straight line in a strict sense, and a corner between the sides is not necessarily a right angle, and may be a circular arc transition.

The battery 20 may be a laminated battery, which is not only convenient for grouping, but also can be processed to obtain a battery with a longer length. Specifically, the battery cell is a laminated battery cell, and the battery cell has mutually-laminated positive pole pieces, negative pole pieces opposite to the positive pole pieces in electrical property and diaphragm sheets arranged between the positive pole pieces and the negative pole pieces, so that a plurality of pairs of positive pole pieces and negative pole pieces are stacked to form the laminated battery cell.

Alternatively, the battery 20 may be a winding battery, that is, a positive electrode plate, a negative electrode plate having an opposite electrical property to the positive electrode plate, and a diaphragm disposed between the positive electrode plate and the negative electrode plate are wound to obtain a winding battery core.

In one embodiment, the battery 20 may be a cylindrical battery. The battery 20 may be a winding battery, that is, a positive electrode plate, a negative electrode plate having an opposite electrical property to the positive electrode plate, and a diaphragm disposed between the positive electrode plate and the negative electrode plate are wound to obtain a winding battery core.

It should be noted that the battery 20 may be provided with an explosion-proof valve, and the explosion-proof valve may be oriented toward the top cover 14, or the explosion-proof valve may be oriented toward the bottom plate 11, which is not limited herein.

It should be noted that, the accommodating space 13 includes a middle region 131 and an edge region 132 disposed around the middle region 131, a plurality of batteries 20 are disposed in the accommodating space 13, that is, the batteries 20 are disposed in the middle region 131 and the edge region 132, one battery 20 may be disposed in both the middle region 131 and the edge region 132, or a certain battery may be disposed in only the middle region 131, or a certain battery may be disposed in only the edge region 132, which is not limited herein.

The plurality of cells 20 in the edge region 132 and the middle region 131 are not all subjected to heat insulation or heat conduction by the heat insulator 30 or the heat conductor 40, and some of the cells 20 are also subjected to heat conduction, as shown in fig. 2. It is not excluded that the area not treated by the heat insulating member 30 or the heat conducting member 40 is larger than the area treated by the heat insulating member 30 or the heat conducting member 40, for example, the orthographic area of the heat insulating member 30 and the heat conducting member 40 on the base plate 11 is not more than half of the area of the base plate 11, and of course, the orthographic area of the heat insulating member 30 and the heat conducting member 40 on the base plate 11 is not more than half of the area of the base plate 11, which is not limited herein.

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 that have been 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 (19)

1. A battery pack, comprising:

the battery box body (10), the battery box body (10) comprises a bottom plate (11) and a frame (12), the frame (12) is arranged on the bottom plate (11) and is enclosed to form an accommodating space (13), and the accommodating space (13) comprises a middle area (131) and an edge area (132) arranged around the middle area (131);

a plurality of batteries (20), a plurality of the batteries (20) being disposed in the accommodation space (13);

at least one of a thermal insulator (30) and a thermal conductor (40), the thermal insulator (30) being disposed opposite the battery (20) with at least a portion of an orthographic projection of the thermal insulator (30) toward the base plate (11) being located in the edge region (132), the thermal conductor (40) being in contact with the battery (20), and at least a portion of an orthographic projection of the thermal conductor (40) toward the base plate (11) being located in the middle region (131).

2. A battery pack according to claim 1, wherein the receiving space (13) is a rectangular cavity, and at least part of the orthographic projection of the heat insulating member (30) toward the bottom plate (11) is located in a corner region of the receiving space (13).

3. A battery pack, as in claim 2, characterized in that said thermal insulator (30) comprises lateral end portions (31), said lateral end portions (31) being located between said rim (12) and said battery (20).

4. A battery pack, according to claim 2 or 3, characterized in that said thermal insulation (30) further comprises a top end portion (32), said top end portion (32) being located at the top of said battery (20).

5. The battery pack of claim 4, wherein the battery case (10) further comprises a top cover (14), the top cover (14) being connected to the frame (12), the top portion (32) being located between the battery (20) and the top cover (14);

wherein the tip portion (32) is in contact with the top cover (14).

6. The battery pack of claim 5, wherein the tip portion (32) is compressibly disposed, the amount of compression of the tip portion (32) being 20% to 30%.

7. The battery pack according to claim 4, wherein the tip portion (32) has an L-shaped configuration.

8. Battery pack according to any of claims 1 to 3, characterized in that the thermal conductivity of the thermal insulation (30) is < 0.1W/(m-K) and/or the thermal conductivity of the thermal conductor (40) is > 1W/(m-K).

9. The battery pack according to any one of claims 1 to 3, wherein the heat insulator (30) is plural, plural heat insulators (30) are provided at intervals, and/or the heat insulator (30) is in contact with the battery (20).

10. The battery pack of claim 1, wherein the thermal conductor member (40) is positioned on top of the battery (20), the battery case (10) further comprising a top cover (14), the top cover (14) being connected to the frame (12), the thermal conductor member (40) being positioned between the top cover (14) and the battery (20);

wherein the heat conducting member (40) is in contact with the top cover (14).

11. The battery pack according to claim 1 or 10, wherein the heat-conducting member (40) is provided in plurality, and the plurality of heat-conducting members (40) are provided at intervals.

12. The battery pack according to claim 11, wherein a plurality of the heat-conducting members (40) are provided at intervals along the length direction of the battery (20).

13. The battery pack according to claim 12, wherein a length of the heat-conducting member (40) of the plurality of heat-conducting members (40) near the central axis of the accommodating space (13) is greater than a length of the heat-conducting member (40) away from the central axis of the accommodating space (13), and/or a width of the heat-conducting member (40) of the plurality of heat-conducting members (40) near the central axis of the accommodating space (13) is greater than a width of the heat-conducting member (40) away from the central axis of the accommodating space (13).

14. The battery pack according to claim 1 or 10, wherein at least a portion of an orthographic projection of the heat-conducting member (40) toward the base plate (11) is located in a central region of the base plate (11), and/or wherein the heat-conducting member (40) extends in a direction perpendicular to a large surface of the battery (20), the heat-conducting member (40) being in contact with the plurality of batteries (20).

15. Battery pack according to claim 1 or 10, wherein the battery (20) is provided with an electrically conductive connection member (21), and the thermally conductive member (40) is in contact with the electrically conductive connection member (21).

16. A battery pack according to claim 1, characterized in that the battery pack also has a support on top of the battery (20), which support is in contact with the battery (20), at least part of the orthographic projection of the support towards the bottom plate (11) being located in the edge region (132);

wherein the thermal conductivity of the support is < 0.1W/(m.K).

17. The battery pack according to claim 16, wherein the support member is provided in plurality, and the plurality of support members are arranged at intervals, and the support member extends in a direction perpendicular to a large surface of the battery (20), and is in contact with the plurality of batteries (20).

18. A battery pack according to claim 16, wherein the battery (20) is provided with an electrically conductive connector (21), and the support member is in contact with the electrically conductive connector (21).

19. A battery pack according to claim 1, wherein the ratio of the area of the middle region (131) orthographically projected towards the bottom plate (11) to the area of the edge region (132) orthographically projected towards the bottom plate (11) is 0.1-1.

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