Battery pack and automobile

Abstract

The utility model relates to a battery pack and an automobile, the battery pack comprises a box body, a supporting plate and a battery cell module, the supporting plate is arranged in the box body, a runner groove is formed in the supporting plate, the battery cell module is attached to the supporting plate and covers an opening of the runner groove, the wall surface of the battery cell module and the groove wall of the runner groove are arranged at an interval, and a runner is defined by the wall surface of the battery cell module and the groove wall of the runner groove; the flow channel is used for circulation of cooling liquid. The battery pack provided by the utility model is simple in structure and relatively low in cost, and the heat exchange efficiency between the cooling liquid and the battery cell module is relatively high.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pack and a vehicle. Background Art

[0002] The battery pack in new energy vehicles provides the driving force for the vehicle to move forward. The battery pack usually includes a box, a battery cell module and a cold plate. The cold plate is formed by the upper flow channel plate and the lower flow channel plate. The cold plate is fixed in the box, and the battery cell module is glued to the cold plate by glue, thereby achieving the functions of fixing, cooling and heating the battery cell module.

[0003] In this way, there are many components involved in the thermal management of the battery cells in the battery pack, the cost is high, and the heat is transferred between the coolant battery modules through the cold plate, and the heat exchange efficiency is low. Utility Model Content

[0004] Based on this, it is necessary to provide a battery pack and a car that have a simple structure, low cost, and high heat exchange efficiency between the coolant and the battery cell module.

[0005] A battery pack includes a box body, a support plate and a battery cell module. The support plate is installed in the box body and has a flow channel groove. The battery cell module is attached to the support plate and covered at the opening of the flow channel groove. The wall surface of the battery cell module and the groove wall of the flow channel groove are spaced apart and surrounded to form a flow channel for circulating cooling liquid.

[0006] In one embodiment, the battery pack further includes a sealing adhesive layer, which is used to bond the battery cell module and the support plate; the sealing adhesive layer is distributed on both sides of the flow channel and is consistent with the extension direction of the flow channel. It can be understood that, in this configuration, the sealing adhesive layer forms a seal on both sides of the flow channel, so that the coolant can only flow along the extension direction of the flow channel, and cannot leak from both sides of the flow channel, thereby improving the sealing of the flow channel.

[0007] In one embodiment, the battery cell module includes a plurality of battery cells, the plurality of battery cells are arranged along a first direction X, and the flow channel reciprocates between two ends of the battery cell module along the first direction X. It is understandable that, in such a configuration, the flow channel can guide the coolant to be more evenly distributed on the wall surface of the battery cell module, so that the heat exchange of the battery cell module is more uniform.

[0008] In one embodiment, the battery module further includes a sealing gasket, which is sandwiched between two adjacent battery cells. It is understandable that, in this configuration, the sealing gasket enables a seal fit between the two adjacent battery cells, thereby preventing the coolant in the flow channel from leaking from between the two adjacent battery cells.

[0009] In one embodiment, the sealing gasket is configured as a rectangular frame structure. It is understandable that, in this configuration, the sealing gasket of the rectangular frame structure is adapted to the side shape of the rectangular battery cell, which not only makes the sealing gasket and the battery cell fit better, but also helps to reduce the weight of the battery pack.

[0010] In one embodiment, the support plate includes a bottom plate and a flange connected to each other, the flow channel groove is provided on the bottom plate, and the flange is distributed along the circumference of the bottom plate and is used to connect to the inner circumferential wall of the box body. It can be understood that, in this arrangement, by providing the flange, the connection area between the support plate and the box body is increased, thereby improving the firmness of the connection between the support plate and the box body and improving the bearing capacity of the support plate.

[0011] In one embodiment, the bottom plate and the flange are an integrally formed structure.

[0012] In one embodiment, at least part of the flow channel groove extends out of the battery cell module and is exposed to the outside, and forms an inlet or an outlet. It can be understood that such a configuration facilitates the coolant to flow into the flow channel through the inlet and flow out of the flow channel through the outlet.

[0013] In one embodiment, the battery pack further comprises a sealing cover plate, which is arranged to cover the exposed flow channel groove; a through hole is provided on the sealing cover plate, and the through hole is used to connect to an external pipeline. It can be understood that such a configuration allows the flow channel to connect to the external pipeline through the through hole, thereby avoiding interference between the external pipeline and the battery cell module.

[0014] The present application also provides a car, which includes the battery pack described in any one of the above embodiments.

[0015] Compared with the form of the flow channel formed by two layers of flow channel plates in the related structure, the present application forms the flow channel by setting the wall of the battery cell module and the groove wall of the flow channel groove to be spaced and enclosed, thereby reducing one layer of flow channel plate, thereby simplifying the parts contained in the battery pack and helping to reduce costs. In addition, the wall of the battery cell module directly contacts the coolant in the flow channel, that is, the battery cell module directly contacts the coolant for heat exchange without heat transfer through the cold plate, which helps to improve the heat exchange efficiency between the battery cell module and the coolant. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 An axonometric view of the battery pack provided for this application;

[0018] Figure 2 A top view of the battery pack provided for this application;

[0019] Figure 3 for Figure 2 Sectional view at AA;

[0020] Figure 4 for Figure 2 Cross-sectional view at BB;

[0021] Figure 5 An exploded view of the battery pack provided for this application.

[0022] Figure numerals: 100, battery pack; 10, box body; 20, support plate; 21, flow channel; 211, inlet; 212, outlet; 22, flow channel; 23, bottom plate; 24, flange; 30, battery cell module; 31, battery cell; 32, sealing gasket; 40, sealing adhesive layer; 41, outer frame layer; 42, guide layer; 43, notch; 50, sealing cover plate; 51, through hole. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0024] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0028] See also Figures 1 to 5 The present application provides a battery pack 100, which includes a box body 10, a support plate 20 and a battery cell module 30. The support plate 20 is installed in the box body 10, and the support plate 20 has a flow channel 21. The battery cell module 30 is attached to the support plate 20 and covers the opening of the flow channel 21. The wall surface of the battery cell module 30 and the groove wall of the flow channel 21 are spaced apart and surrounded to form a flow channel 22, and the flow channel 22 is used for the circulation of coolant. Compared with the form of the flow channel formed by two layers of flow channel plates in the related structure, the present application reduces one layer of flow channel plate by setting the wall surface of the battery cell module 30 and the groove wall of the flow channel 21 to be spaced apart and surrounded to form the flow channel 22, thereby simplifying the parts contained in the battery pack 100 and helping to reduce costs. Furthermore, the wall surface of the cell module 30 directly contacts the coolant in the flow channel 22 , that is, the cell module 30 directly contacts and exchanges heat with the coolant without heat transfer through a cold plate, thereby facilitating improving the heat exchange efficiency between the cell module 30 and the coolant.

[0029] The box body 10 is formed by a bottom wall and a plurality of side walls connected to the periphery of the bottom wall, wherein the support plate 20 can cooperate with the bottom surface of the battery cell module 30 to form a flow channel 22, and can also cooperate with the side surface of the battery cell module 30 to form a flow channel 22.

[0030] Exemplarily, in one embodiment, the support plate 20 is installed above the bottom wall of the box body 10, the flow channel 21 is recessed on the support plate 20 toward the side close to the bottom wall of the box body 10, the battery cell module 30 is crimped to the support plate 20, and the bottom surface of the battery cell module 30 is spaced apart from the wall of the flow channel 21, and the flow channel 22 is formed in an enclosed manner.

[0031] Furthermore, if Figure 5 As shown, the support plate 20 includes a bottom plate 23 and a flange 24 connected to each other, the flow channel groove 21 is provided on the bottom plate 23, and the flange 24 is distributed along the circumference of the bottom plate 23 and is used to connect the inner circumferential wall of the box body 10. By providing the flange 24, the connection area between the support plate 20 and the box body 10 is increased, so that the firmness of the connection between the support plate 20 and the box body 10 can be improved, and the bearing capacity of the support plate 20 can be improved. Among them, the support plate 20 is spaced from the bottom wall of the box body 10, and a cavity structure is formed between the support plate 20 and the bottom wall of the box body 10.

[0032] Specifically, the bottom plate 23 is rectangular, and there are four flanges 24, which are respectively connected to four side edges of the rectangular bottom plate 23. The flanges 24 are welded to the side walls of the box body 10, and the welding method may be spot welding.

[0033] Furthermore, the bottom plate 23 and the flange 24 are an integrally formed structure. The forming method can be bending forming. The bottom plate 23 is processed into the flow channel groove 21 by stamping.

[0034] like Figure 2 and Figure 3 As shown, at least part of the flow channel groove 21 extends out of the battery cell module 30 and is exposed to the outside, and forms an inlet 211 or an outlet 212. The coolant flows into the flow channel 22 through the inlet 211 and flows out of the flow channel 22 through the outlet 212.

[0035] Alternatively, if Figure 5 As shown, the battery pack 100 also includes a sealing cover plate 50, which is covered on the exposed flow channel groove 21. A through hole 51 is opened on the sealing cover plate 50, and the through hole 51 is used to connect to the external pipeline. In this embodiment, the flow channel 22 extends from the bottom of the battery cell module 30, and the through hole 51 is used to form an inlet 211 or an outlet 212. In this way, it is convenient for the flow channel 22 to connect to the external pipeline through the through hole 51, and interference between the external pipeline and the battery cell module 30 is avoided.

[0036] like Figure 5 As shown, the cell module 30 includes a plurality of cells 31, and the plurality of cells 31 are arranged along a first direction X, and along the first direction X, the flow channel 22 extends back and forth between the two ends of the cell module 30. The first direction X can be configured as the thickness direction of the cell 31. In this way, the flow channel 22 can guide the coolant to be more evenly distributed on the bottom surface of the cell module 30, so that the heat exchange of the cell module 30 is more uniform.

[0037] Optionally, along the first direction X, the inlet 211 and the outlet 212 are located at the same end of the battery cell module.

[0038] Furthermore, if Figure 5As shown, the cell module 30 further includes a sealing gasket 32, which is sandwiched between two adjacent cells 31. The sealing gasket 32 ​​allows the two adjacent cells 31 to be sealed, thereby preventing the coolant in the flow channel 22 from leaking from between the two adjacent cells 31.

[0039] Optionally, the sealing gasket 32 ​​is configured as a rectangular frame structure. That is, the sealing gasket 32 ​​is hollowed out, and the sealing gasket 32 ​​of the rectangular frame structure is adapted to the side shape of the rectangular battery cell 31, which not only makes the sealing gasket 32 ​​and the battery cell 31 more closely fitted, but also helps to reduce the weight of the battery pack. The sealing gasket 32 ​​is elastic, and the material can be configured as rubber or silicone.

[0040] Of course, the present invention is not limited thereto. In other embodiments, the sealing gasket 32 ​​may also be configured in a strip or plate shape, as long as the coolant in the flow channel 22 can be prevented from leaking from between two adjacent battery cells 31 .

[0041] like Figure 5 As shown, the battery pack 100 further includes a sealing adhesive layer 40, which is used to bond the battery cell module 30 and the support plate 20. The sealing adhesive layer 40 is distributed on both sides of the flow channel 21 and is consistent with the extension direction of the flow channel 21. In this way, the sealing adhesive layer 40 forms a seal on both sides of the flow channel 21, so that the coolant can only flow along the extension direction of the flow channel 21, and cannot leak from both sides of the flow channel 21, thereby improving the sealing of the flow channel 22.

[0042] Exemplarily, in one embodiment, a plurality of battery cells 31 are arranged along a first direction X, and along the first direction X, the flow channel 22 reciprocates between the two ends of the battery cell module 30. The sealing adhesive layer 40 includes an outer frame layer 41 and a guide layer 42, wherein the outer frame layer 41 is framed outside the flow channel 22, one end of the guide layer 42 is connected to the outer frame layer 41, and the other end extends along the first direction X and forms a gap 43 with the outer frame layer 41, and the flow channel 22 is reversed at the gap.

[0043] The sealing adhesive layer 40 may be configured as a thermally conductive structural adhesive.

[0044] The present application also provides a car, which includes the battery pack described in any one of the above embodiments.

[0045] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A battery pack, characterized in that: The battery pack comprises a box body (10), a support plate (20) and a cell module (30); the support plate (20) is installed in the box body (10), and the support plate (20) has a flow channel (21); the cell module (30) is attached to the support plate (20) and covers the opening of the flow channel (21); the wall surface of the cell module (30) and the groove wall of the flow channel (21) are spaced apart and surrounded to form a flow channel (22); the flow channel (22) is used for circulating a cooling liquid.

2. The battery pack according to claim 1, characterized in that: The battery pack further comprises a sealing adhesive layer (40), wherein the sealing adhesive layer (40) is used to bond the battery cell module (30) and the support plate (20); Furthermore, the sealing adhesive layer (40) is distributed on both sides of the flow channel groove (21) and is consistent with the extension direction of the flow channel groove (21).

3. The battery pack according to claim 1, characterized in that: The battery cell module (30) comprises a plurality of battery cells (31), the plurality of battery cells (31) are arranged along a first direction X, and along the first direction X, the flow channel (22) reciprocates between two ends of the battery cell module (30).

4. The battery pack according to claim 3, characterized in that: The battery cell module (30) further comprises a sealing gasket (32), wherein the sealing gasket (32) is sandwiched between two adjacent battery cells (31).

5. The battery pack according to claim 4, characterized in that: The sealing pad (32) is configured as a rectangular frame structure.

6. The battery pack according to claim 1, characterized in that: The support plate (20) comprises a bottom plate (23) and a flange (24) connected to each other, the flow channel groove (21) is arranged on the bottom plate (23), and the flange (24) is distributed along the circumference of the bottom plate (23) and is used to connect to the inner circumferential wall of the box body (10).

7. The battery pack according to claim 6, characterized in that: The bottom plate (23) and the flange (24) are an integrally formed structure.

8. The battery pack according to claim 1, characterized in that: At least a portion of the flow channel (21) extends out of the battery cell module (30) to be exposed, and forms an inlet (211) or an outlet (212).

9. The battery pack according to claim 7, characterized in that: The battery pack further comprises a sealing cover plate (50), wherein the sealing cover plate (50) is arranged to cover the exposed flow channel groove (21); The sealing cover plate (50) is provided with a through hole (51), and the through hole (51) is used for connecting to an external pipeline.

10. An automobile, characterized in that: Comprising a battery pack as described in any one of claims 1 to claim 9.

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