CN219419165U

CN219419165U - Battery pack

Info

Publication number: CN219419165U
Application number: CN202223488965.9U
Authority: CN
Inventors: 何亚飞; 王宇星
Original assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Current assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-07-25
Anticipated expiration: 2032-12-26

Abstract

The utility model belongs to the technical field of new energy, and particularly relates to a battery pack, which comprises the following components: the frame comprises a left side beam, a right side beam, a front beam and a rear beam, and the left side beam, the right side beam, the front beam and the rear beam are enclosed to form the frame; an upper cover detachably connected with the upper part of the frame; a bottom plate connected to the lower part of the frame; the battery cell is accommodated in the accommodating space formed by enclosing the frame, the upper cover and the bottom plate; at least one of the left side beam, the right side beam, the front beam and the rear beam is provided with two layers of cavities, wherein one side close to the battery cell is provided with a cooling cavity, one side far away from the battery cell is provided with a buffer cavity, and the cooling cavity is filled with non-Newtonian cooling fluid. The utility model can effectively resist high-speed impact load, thereby protecting the periphery of the battery cell.

Description

Battery pack

Technical Field

The utility model belongs to the technical field of new energy, and particularly relates to a battery pack.

Background

In the prior art, the mainstream battery integration scheme of the electric vehicle is CTM (Cell to Module) integration, CTP (Cell to Pack) integration and CTC (Cell to Chassis) integration, wherein CTC integration refers to that the battery is directly integrated on a vehicle chassis, the battery is used as a part of a vehicle body structural member, and the space utilization rate can be effectively improved through CTC integration. However, in the prior art, in order to ensure that CTC integration meets the load bearing and strength requirements, certain heat dissipation performance is generally sacrificed, resulting in a risk of thermal runaway of the battery.

Disclosure of Invention

In view of the above-described drawbacks of the prior art, an object of the present utility model is to provide a battery pack capable of improving cooling performance while satisfying load bearing strength.

To achieve the above and other related objects, the present utility model provides a battery pack comprising:

the frame comprises a left side beam, a right side beam, a front beam and a rear beam, wherein the left side beam, the right side beam, the front beam and the rear beam are enclosed to form the frame;

an upper cover detachably connected to an upper portion of the frame;

a bottom plate connected to a lower portion of the frame;

the batteries are arranged in the battery array and are accommodated in an accommodating space formed by enclosing the frame, the upper cover and the bottom plate;

at least one of the left side beam, the right side beam, the front beam and the rear beam is provided with two layers of cavities, a cooling cavity is arranged on one side close to the battery, a buffer cavity is arranged on one side far away from the battery, and non-Newtonian cooling fluid is filled in the cooling cavity.

In an alternative embodiment of the utility model, a first chute is arranged on the upper side of the frame along the horizontal direction, and the upper cover is in sliding fit with the first chute along the horizontal direction.

In an alternative embodiment of the utility model, a retainer is provided between the frame and the upper cover, the retainer being configured to maintain the upper cover and the frame in a relatively fixed state when the upper cover completely closes the upper end of the frame.

In an alternative embodiment of the present utility model, the buffer chamber is provided with reinforcing ribs or fillers.

In an alternative embodiment of the present utility model, the upper cover includes a first support layer and a first cooling layer, the first cooling layer being located below the first support layer, the first cooling layer being filled with a non-newtonian cooling fluid; a cavity is formed in the first supporting layer, and the cavity is filled with buffering energy-absorbing materials.

In an alternative embodiment of the utility model, the base plate is detachably connected to the frame.

In an alternative embodiment of the utility model, the lower side of the frame is provided with a second chute in the horizontal direction, and the bottom plate is in sliding fit with the second chute in the horizontal direction.

In an alternative embodiment of the utility model, a retainer is provided between the frame and the base plate, the retainer being configured to maintain the base plate and the frame in a relatively fixed state when the base plate fully closes the lower end of the frame.

In an alternative embodiment of the utility model, the base plate comprises a second support layer and a second cooling layer, the second cooling layer being located above the second support layer.

In an alternative embodiment of the present utility model, the frame further includes a middle cross member connected between the left side beam and the right side beam, and a middle side member connected between the front beam and the rear beam, wherein the middle cross member and the middle side member are provided with a coolant flow passage inside.

The utility model has the technical effects that: according to the utility model, the buffer cavity is arranged around the battery, the non-Newtonian cooling fluid is filled in the buffer cavity, and the non-Newtonian fluid can effectively resist high-speed impact load, so that the periphery of the battery is protected.

Drawings

Fig. 1 is an exploded view of a battery pack provided by an embodiment of the present utility model;

fig. 2 is a perspective view of a battery pack provided by an embodiment of the present utility model;

FIG. 3 is a side view of a frame provided by an embodiment of the present utility model;

fig. 4 is a top view of a battery pack according to an embodiment of the present utility model;

fig. 5 is a bottom view of a battery pack provided by an embodiment of the present utility model;

FIG. 6 is a top view of a frame provided by an embodiment of the present utility model;

FIG. 7 is an enlarged partial view of I of FIG. 6;

fig. 8 is a schematic view of a partially cut-away perspective structure of an upper cover according to an embodiment of the present utility model.

Reference numerals: 10. a frame; 11. a left side beam; 12. a right side beam; 13. a front beam; 14. a rear beam; 15. a cooling chamber; 16. a middle longitudinal beam; 17. a middle cross beam; 18. a chassis support; 101. a first chute; 102. a second chute; 103. a holder; 20. an upper cover; 21. a first support layer; 22. a first cooling layer; 30. a bottom plate; 40. and a battery.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.

It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present utility model by way of illustration, and only the components related to the present utility model are shown in the illustrations, not according to the number, shape and size of the components in actual implementation, and the form, number and proportion of each component in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.

Referring to fig. 1-8, the battery pack provided by the utility model adopts CTC integration, the battery 40 is integrated on a chassis of a vehicle body, the CTC integration can effectively improve the space utilization rate and the energy density of the battery 40, the cooling cavity 15 is arranged around the battery 40, and the cooling cavity 15 is filled with non-newton cooling fluid, wherein the non-newton fluid is fluid which does not satisfy newton's law of viscosity experiments, namely, the fluid which does not satisfy the linear relationship between the shear stress and the shear strain rate of the non-newton fluid can effectively resist high-speed impact load, so that the periphery of the battery 40 is protected, and in addition, the non-newton fluid in the utility model also serves as a heat conducting medium for radiating heat of the battery 40, so that the CTC integration has good heat radiation performance while satisfying the bearing strength, and the thermal runaway optimization of the battery 40 is realized.

Referring to fig. 1-8, a battery 40 pack includes a frame 10, an upper cover 20, a bottom plate 30 and a battery 40, wherein the frame 10 includes a left side beam 11, a right side beam 12, a front beam 13 and a rear beam 14, and the left side beam 11, the right side beam 12, the front beam 13 and the rear beam 14 enclose a rectangular frame, and it should be noted that, in the present utility model, terms indicating directions such as "front", "rear", "left", "right" and the like are based on general knowledge in the art, i.e. "front", "rear", "left", "right" respectively indicate the front, rear, left and right sides of a vehicle; in a specific embodiment, the frame 10 may be provided with intermediate beams, such as intermediate stringers 16 and intermediate cross beams 17, in addition to the peripheral left side rail 11, right side rail 12, front rail 13 and rear rail 14, for example, within a rectangular frame to strengthen the rectangular frame and further enhance the load carrying capacity.

Referring to fig. 1, an upper cover 20 is detachably coupled to an upper portion of the frame 10; in a specific embodiment, the upper side of the frame 10 is provided with a first sliding groove 101 along the horizontal direction, the upper cover 20 is slidably matched with the first sliding groove 101 along the horizontal direction, the first sliding groove 101 may be, for example, a sliding groove formed on the inner side of the front beam 13 and the rear beam 14, and in other embodiments, the first sliding groove 101 may also be a linear rail or other elements capable of guiding sliding.

Referring to fig. 1, a bottom plate 30 is detachably coupled to a lower portion of the frame 10; similarly, in a specific embodiment, the lower side of the frame 10 is provided with a second sliding groove 102 along a horizontal direction, the bottom plate 30 is slidably matched with the second sliding groove 102 along a horizontal direction, and the second sliding groove 102 may be, for example, a sliding groove formed on the inner sides of the front beam 13 and the rear beam 14, and in other embodiments, the second sliding rail may be a linear rail or other elements capable of guiding sliding.

It should be appreciated that the upper cover 20 and the bottom plate 30 of the present utility model are opened or closed in a side-pull manner, so that maintenance of the battery 40 can be performed without dismantling the vehicle interior.

Referring to fig. 6 and 7, a plurality of batteries 40 are arranged in an array and are accommodated in an accommodating space surrounded by the frame 10, the upper cover 20 and the bottom plate 30; in this embodiment, the left side beam 11, the right side beam 12, the front beam 13 and the rear beam 14 are respectively provided with two layers of cavities, wherein a cooling cavity 15 is arranged at one side close to the battery 40, a buffer cavity is arranged at one side far away from the battery 40, a non-newton cooling fluid is filled in the cooling cavity 15, the non-newton fluid can effectively resist high-speed impact load, so as to protect the periphery of the battery 40, in addition, the non-newton fluid also serves as a heat conducting medium for radiating the battery 40, so that CTC is integrated with good heat dissipation performance while meeting the bearing strength, and the thermal runaway optimization of the battery 40 is realized, and it should be understood that in other embodiments, the cooling cavity 15 may be arranged only at a partial area of the frame 10, and the buffer cavity may be provided with reinforcing ribs or fillers, for example, carbon fibers and resin, so as to further improve the protection strength of the periphery of the battery 40.

Referring to fig. 4-6, in a further embodiment, a retaining member 103 is disposed between the frame 10 and the upper cover 20, the retaining member 103 being configured to maintain the upper cover 20 and the frame 10 in a relatively fixed state when the upper cover 20 completely closes the upper end of the frame 10. A holder 103 is provided between the frame 10 and the bottom plate 30, the holder 103 being configured such that the holder 103 can hold the bottom plate 30 and the frame 10 in a relatively fixed state when the bottom plate 30 completely closes the lower end of the frame 10. In a specific embodiment, the retaining member 103 may be, for example, a positioning pin, and the upper cover 20, the frame 10 and the bottom plate 30 are respectively provided with a pin hole, and when the upper cover 20 and the bottom plate 30 are completely closed, the pin holes on the upper cover 20 and the bottom plate 30 are coaxial, and the positioning pin is inserted into the pin holes to prevent the upper cover 20 and the bottom plate 30 from opening, which should be understood that in other embodiments, the retaining member 103 may be replaced by other structures, for example, the retaining member 103 may be a bolt.

Referring to fig. 8, in a specific embodiment, the upper cover 20 includes a first supporting layer 21 and a first cooling layer 22, the first cooling layer 22 is located below the first supporting layer 21, the first cooling layer 22 is filled with a non-newton cooling fluid, specifically, a cavity is disposed in the first supporting layer 21, and the cavity is filled with a buffering energy absorbing material, for example, carbon fiber and resin, so that the requirement of light weight of the vehicle body is met while the sufficient bearing capacity of the upper cover 20 is ensured.

Referring to fig. 1, in one embodiment, the bottom plate 30 includes a second supporting layer and a second cooling layer, where the second cooling layer is located above the second supporting layer, and the second cooling layer may be integrated in the second supporting layer or integrated on an upper surface of the second supporting layer, for example. For example, a flow passage may be formed in the bottom plate 30, or a cooling coil may be installed on the surface of the bottom plate 30, and in a further embodiment, a hollow chassis support 18 may be disposed at the bottom of the frame 10, where the chassis support 18 can improve the bearing capacity of the bottom plate 30.

In summary, the cooling cavity 15 is disposed around the battery 40, and the non-newton cooling fluid is filled in the cooling cavity 15, so that the non-newton fluid can effectively resist high-speed impact load, thereby protecting the periphery of the battery 40, and in addition, the non-newton fluid in the utility model also serves as a heat conducting medium for radiating heat of the battery 40, so that CTC is integrated to have good heat radiation performance while meeting the bearing strength, and thermal runaway optimization of the battery 40 is realized.

The upper cover 20 and the bottom plate 30 of the present utility model are opened or closed in a side-pull manner, so that maintenance of the battery 40 can be performed without dismantling the vehicle interior.

The frame 10 and the upper cover 20 are both of hollow double-layer structures, and reinforcing ribs or fillers are arranged in the cavities, so that the light-weight design of the vehicle body is realized while the bearing performance is improved.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

In the description herein, numerous specific details are provided, such as examples of components and/or methods, to provide a thorough understanding of embodiments of the utility model. One skilled in the relevant art will recognize, however, that an embodiment of the utility model can be practiced without one or more of the specific details, or with other apparatus, systems, components, methods, components, materials, parts, and so forth. In other instances, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of embodiments of the utility model.

Reference throughout this specification to "one embodiment," "an embodiment," or "a particular embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment, and not necessarily all embodiments, of the present utility model. Thus, the appearances of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics of any specific embodiment of the present utility model may be combined in any suitable manner with one or more other embodiments. It will be appreciated that other variations and modifications of the embodiments of the utility model herein and shown are possible in light of the teachings herein and are to be regarded as part of the spirit and scope of the utility model.

It will also be appreciated that one or more of the elements shown in the figures may also be implemented in a more separated or integrated manner, or even removed because of inoperability in certain circumstances or provided because it may be useful depending on the particular application.

In addition, any labeled arrows in the drawings/figures should be considered only as exemplary, and not limiting, unless otherwise specifically indicated. Furthermore, the term "or" as used herein is generally intended to mean "and/or" unless specified otherwise. Combinations of parts or steps will also be considered as being noted where terminology is foreseen as rendering the ability to separate or combine is unclear.

As used in the description herein and throughout the claims that follow, unless otherwise indicated, "a", "an", and "the" include plural references. Also, as used in the description herein and throughout the claims that follow, unless otherwise indicated, the meaning of "in …" includes "in …" and "on …".

The above description of illustrated embodiments of the utility model, including what is described in the abstract, is not intended to be exhaustive or to limit the utility model to the precise forms disclosed herein. Although specific embodiments of, and examples for, the utility model are described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the present utility model, as those skilled in the relevant art will recognize and appreciate. As noted, these modifications can be made to the present utility model in light of the foregoing description of illustrated embodiments of the present utility model and are to be included within the spirit and scope of the present utility model.

The systems and methods have been described herein in general terms as being helpful in understanding the details of the present utility model. Furthermore, various specific details have been set forth in order to provide a thorough understanding of embodiments of the utility model. One skilled in the relevant art will recognize, however, that an embodiment of the utility model can be practiced without one or more of the specific details, or with other apparatus, systems, assemblies, methods, components, materials, parts, and/or the like. In other instances, well-known structures, materials, and/or operations are not specifically shown or described in detail to avoid obscuring aspects of embodiments of the utility model.

Thus, although the utility model has been described herein with reference to particular embodiments thereof, a latitude of modification, various changes and substitutions are intended in the foregoing disclosures, and it will be appreciated that in some instances some features of the utility model will be employed without a corresponding use of other features without departing from the scope and spirit of the utility model as set forth. Therefore, many modifications may be made to adapt a particular situation or material to the essential scope and spirit of the present utility model. It is intended that the utility model not be limited to the particular terms used in following claims and/or to the particular embodiment disclosed as the best mode contemplated for carrying out this utility model, but that the utility model will include any and all embodiments and equivalents falling within the scope of the appended claims. Accordingly, the scope of the utility model should be determined only by the following claims.

Claims

1. A battery pack, comprising:

an upper cover detachably connected to an upper portion of the frame;

a bottom plate connected to a lower portion of the frame;

2. The battery pack according to claim 1, wherein the upper side of the frame is provided with a first slide groove in a horizontal direction, and the upper cover is slidably fitted with the first slide groove in the horizontal direction.

3. The battery pack according to claim 2, wherein a holder is provided between the frame and the upper cover, the holder being configured to hold the upper cover and the frame in a relatively fixed state when the upper cover completely closes the upper end of the frame.

4. The battery pack of claim 1, wherein the buffer chamber is provided with ribs or fillers.

5. The battery pack of claim 1, wherein the upper cover comprises a first support layer and a first cooling layer, the first cooling layer being located below the first support layer, the first cooling layer being filled with a non-newtonian cooling fluid; a cavity is formed in the first supporting layer, and the cavity is filled with buffering energy-absorbing materials.

6. The battery pack of claim 1, wherein the base plate is removably connected to the frame.

7. The battery pack of claim 6, wherein the lower side of the frame is provided with a second slide groove in a horizontal direction, and the bottom plate is slidably fitted with the second slide groove in the horizontal direction.

8. The battery pack of claim 7, wherein a retainer is disposed between the frame and the base plate, the retainer being configured to maintain the base plate and the frame in a relatively fixed state when the base plate completely closes the lower end of the frame.

9. The battery pack of claim 1, wherein the base plate includes a second support layer and a second cooling layer, the second cooling layer being located above the second support layer.

10. The battery pack according to claim 1, wherein the frame further comprises a middle cross member and a middle side member, the middle cross member being connected between the left side member and the right side member, the middle side member being connected between the front beam and the rear beam, the middle cross member and the middle side member being provided with a coolant flow passage inside.