Battery pack cover plate, battery pack and vehicle

Abstract

The utility model relates to the technical field of vehicles, in particular to a battery pack cover plate, a battery pack and a vehicle, the battery pack cover plate is suitable for being connected with a box body of the battery pack and abutting against a pole of a single battery of the battery pack, a plurality of cooling channels are arranged in the battery pack cover plate, the cooling channels extend in the first direction, and the cooling channels are arranged in the first direction. The plurality of cooling channels are arranged at intervals along a second direction, and the first direction and the second direction are respectively the length direction and the width direction of the battery pack cover plate. The cooling channel is arranged in the battery pack cover plate, the battery pack cover plate is connected with the box body of the battery pack and abuts against the pole of the single battery, namely, the liquid cooling plate set and the cover plate of the battery pack are integrated into the battery pack cover plate, so that the pole of the single battery can be cooled, and the quick charging requirement is met; and the Z-direction space of the battery pack can be prevented from being excessively occupied, and the saved Z-direction space can be used for increasing the battery capacity of the single battery.

Description

Technical Field

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

[0002] As the energy storage unit of electric vehicles, the battery pack will generate heat during the charging and discharging process. If there is a lack of a corresponding cooling system, the battery pack will become overheated, thus endangering the safety of the entire vehicle.

[0003] As the demand for fast charging of battery packs increases, it is particularly important to maintain the internal temperature of the battery pack stable and control the temperature rise during fast charging. It is necessary to arrange as many liquid cooling systems as possible in a limited space. Therefore, a liquid cooling system is also arranged on the pole side of the single battery, such as a liquid-cooled harmonica tube. However, the liquid cooling system arranged on the pole side of the single battery will also occupy the Z-direction space of the battery pack, affecting the battery capacity of the single battery. Utility Model Content

[0004] In order to solve the above technical problems, the present disclosure provides a battery pack cover, a battery pack and a vehicle.

[0005] In a first aspect, the present disclosure provides a battery pack cover, which is suitable for connecting to a battery pack box and abutting against the poles of the single cells of the battery pack, wherein a plurality of cooling channels are arranged inside the battery pack cover, the cooling channels extend along a first direction, and a plurality of the cooling channels are arranged at intervals along a second direction, and the first direction and the second direction are respectively the length direction and the width direction of the battery pack cover.

[0006] Optionally, the battery pack cover plate includes a plate-shaped body, and the cooling channel is provided in the body.

[0007] Optionally, the battery pack cover includes an integrally formed main body and a plurality of U-shaped plates, the main body is in a plate shape, the plurality of U-shaped plates are arranged at intervals in the second direction, and the cooling channel is formed between the U-shaped plates and the main body.

[0008] Optionally, the battery pack cover plate includes heat-conducting fins, which extend along the first direction, and at least one heat-conducting fin is arranged in each cooling channel.

[0009] Optionally, the battery pack cover plate further includes a current collector having an inner channel, the current collector is connected to two adjacent U-shaped plates in the second direction, and the inner channel communicates with the two cooling channels.

[0010] Optionally, in the second direction, any at least two adjacent cooling channels are connected in sequence to form a serpentine flow channel.

[0011] Optionally, the battery pack cover includes a main body and a connecting edge surrounding the main body, and the connecting edge is provided with a through hole for screws to pass through.

[0012] In a second aspect, the present disclosure provides a battery pack, comprising a case, a battery pack and a battery pack cover as provided in the first aspect, wherein the battery pack comprises a plurality of single cells, the battery pack cover is connected to the case, and a receiving cavity for accommodating the battery pack is formed therebetween, and the battery pack cover abuts against the poles of the single cells.

[0013] In a third aspect, the present disclosure provides a battery pack, comprising a case, a battery pack and the battery pack cover provided in the first aspect, wherein the battery pack comprises a plurality of single cells, the battery pack cover is connected to the case, and a receiving cavity for accommodating the battery pack is formed therebetween, and the U-shaped plate of the battery pack cover abuts against the pole of the single cell.

[0014] In a fourth aspect, the present disclosure provides a vehicle, comprising the battery pack provided in the second aspect or the third aspect.

[0015] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0016] By setting a cooling channel in the battery pack cover, the battery pack cover is connected to the battery pack box and abuts the pole of the single cell, that is, the liquid cooling plate set and the battery pack cover are integrated into a battery pack cover. It can not only realize the cooling of the single cell pole to meet the fast charging requirements, but also avoid excessive occupation of the Z-direction space of the battery pack. The saved space can be used to increase the battery capacity of the single cell and improve the battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 A schematic diagram of disassembling a battery pack according to an embodiment of the present disclosure;

[0020] Figure 2 It is a bottom view schematic diagram of the battery pack cover plate according to the embodiment of the present disclosure;

[0021] Figure 3 for Figure 2 A partial schematic diagram of the AA section view;

[0022] Figure 4 It is a partial cross-sectional schematic diagram of a battery pack cover plate described in an embodiment of the present disclosure.

[0023] in,

[0024] 1. Battery pack cover; 11. Body; 12. Connecting edge; 13. U-shaped plate; 14. Current collector; 15. Heat conducting fins; 101. Cooling channel;

[0025] 2. Battery pack; 21. Single cell;

[0026] 3. Box body. DETAILED DESCRIPTION

[0027] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0029] like Figures 1 to 3 As shown, the present disclosure provides a battery pack cover plate, which is suitable for connecting to the box body 3 of the battery pack and abutting against the pole of the single battery 21 of the battery pack. The battery pack cover plate 1 is provided with a plurality of cooling channels 101 inside, the cooling channels 101 extend along a first direction, and the plurality of cooling channels 101 are arranged at intervals along a second direction, and the first direction and the second direction are the length direction and the width direction of the battery pack cover plate 1, respectively.

[0030] Understandably, by setting a cooling channel 101 in the battery pack cover 1, the battery pack cover 1 is connected to the battery pack box 3 and abuts against the pole of the single battery 21, that is, the liquid cooling plate and the battery pack cover are integrated into the battery pack cover 1, which can not only realize the cooling of the pole of the single battery 21 to meet the fast charging requirements, but also avoid excessive occupation of the Z-direction space of the battery pack, and the saved Z-direction space can be used to increase the battery capacity of the single battery 21 and improve the battery life. Among them, the Z-direction space of the battery pack refers to the space of the battery pack in the height direction of the single battery 21.

[0031] Reference Figure 2 and Figure 3In some embodiments, the battery pack cover 1 includes an integrally formed main body 11 and a plurality of U-shaped plates 13 , the main body 11 is in a plate shape, the plurality of U-shaped plates 13 are arranged at intervals in the second direction, and a cooling channel 101 is formed between the U-shaped plates 13 and the main body 11 .

[0032] That is to say, the U-shaped plate 13 and the body 11 share a side wall, which can reduce the thickness of one side wall of the liquid-cooled harmonica tube compared to the prior art, thereby reducing the space occupied in the Z direction of the battery pack when the battery pack is formed. For example, assuming that in the prior art, the thickness of the cover plate of the battery pack is H1mm, and the thickness of the tube wall of the liquid-cooled harmonica tube is H2mm, if the liquid-cooled harmonica tube is directly arranged between the cover plate and the pole of the single battery 21, the sum of the thickness of the cover plate and the thickness of the tube wall of the liquid-cooled harmonica tube is (H1+H2)mm, but the body 11 (with a thickness of H1mm) and the U-shaped plate 13 are used to form the cooling channel 101, that is, the cover plate and the liquid-cooled harmonica tube are integrated into one, and the body 11 is a side wall of the cooling channel 101, which is equivalent to subtracting the thickness of the tube wall of the liquid-cooled harmonica tube, thereby reducing the space occupied in the Z direction of the battery pack.

[0033] It should be noted that the main body 11 and the multiple U-shaped plates 13 are integrally formed, for example, by injection molding, casting, etc. When injection molding is used, the material of the battery pack cover 1 is plastic, and when casting is used, the material of the battery pack cover 1 is metal. In addition, optionally, the main body 11 and the multiple U-shaped plates 13 can also be separately provided, and the main body 11 and the U-shaped plates 13 are connected by welding, welding, etc. to form the battery pack cover 1.

[0034] For example, in a specific implementation, the U-shaped plate 13 is a linear structure, that is, the cooling channel 101 is a linear flow channel extending along the first direction. Alternatively, the U-shaped plate 13 can also be a serpentine structure, but extends along the first direction, in which case the cooling channel 101 is a serpentine flow channel extending along the first direction.

[0035] Reference Figure 4 In other embodiments, the battery pack cover 1 further includes a current collector 14 having an inner channel, the current collector 14 connects two adjacent U-shaped plates 13 in the second direction, and the inner channel connects two adjacent cooling channels 101 .

[0036] It can be understood that two adjacent cooling channels 101 can be connected via the current collector 14 , so that the coolant can be connected between the plurality of cooling channels 101 .

[0037] It should be noted that the current collector 14 may be integrally formed with the body 11 and the U-shaped plate 13 , or may be separately provided with the body 11 and the U-shaped plate 13 , and connected to form the battery pack cover 1 .

[0038] Optionally, in a specific implementation, the current collector 14 may also be a U-shaped structure, and the inner channel is formed between the U-shaped structure and the body 11, and the inner channel connects two adjacent cooling channels 101. Alternatively, the current collector 14 may also be a tubular structure with an inner channel, and the tubular structure is connected to the U-shaped plate 13. In this case, the height of the tubular structure in the thickness direction of the body 11 is set to be equal to or less than the height of the U-shaped plate 13, so as to avoid the current collector 14 protruding and causing the battery pack cover 1 to occupy more Z-direction space of the battery pack.

[0039] Further, in the second direction, any at least two adjacent cooling channels 101 are connected in sequence to form a serpentine flow channel. That is, multiple cooling channels 101 may be connected in sequence to form a serpentine flow channel; or multiple cooling channels 101 may be divided into multiple groups, each group having at least two cooling channels 101, and each group having at least two cooling channels 101 connected in sequence to form a serpentine flow channel, in which case there are multiple serpentine flow channels.

[0040] For example, refer to Figure 2 There are twelve cooling channels 101, which are divided into three groups. The four cooling channels 101 in each group are connected in sequence to form a serpentine flow channel. Among the four cooling channels 101 in each group, two adjacent cooling channels 101 are connected through an inner channel of a current collector 14.

[0041] Reference Figure 4 In other embodiments, the battery pack cover 1 includes a plate-shaped body 11 having a cooling channel 101 therein.

[0042] It can be understood that the interior of the main body 11 has a cooling channel 101, which directly eliminates the need for a liquid-cooled harmonica tube compared to the prior art, thereby reducing the space occupied by the battery pack in the Z direction.

[0043] Further, in the second direction, any at least two adjacent cooling channels 101 are connected in sequence to form a serpentine flow channel. That is, multiple cooling channels 101 may be connected in sequence to form a serpentine flow channel; or multiple cooling channels 101 may be divided into multiple groups, each group having at least two cooling channels 101, and each group having at least two cooling channels 101 connected in sequence to form a serpentine flow channel, in which case there are multiple serpentine flow channels.

[0044] Optionally, the body 11 of the battery pack cover 1 can be integrally formed by injection molding, casting, etc. When injection molding is used, the material of the battery pack cover 1 is plastic, and when casting is used, the material of the battery pack cover 1 is metal.

[0045] Reference Figure 3 and Figure 4 In some embodiments, the battery pack cover 1 further includes heat-conducting fins 15 , which extend along the first direction, and at least one heat-conducting fin 15 is disposed in each cooling channel 101 .

[0046] It is understandable that by providing the heat-conducting fins 15 , the heat exchange area between the coolant in the cooling channel 101 and the battery pack cover plate 1 can be increased, thereby improving the heat exchange efficiency and further improving the cooling effect on the single battery 21 .

[0047] It should be noted that, refer to Figure 3 When the battery pack cover 1 includes a body 11 and a U-shaped plate 13, if the body 11 and the U-shaped plate 13 are integrally formed, the thermal conductive fins 15 can be integrally formed with the body 11 and the U-shaped plate 13. When the body 11 and the U-shaped plate 13 are separate structures, the thermal conductive fins 15 can be integrally formed with the body 11, or integrally formed with the U-shaped plate 13, or the thermal conductive fins 15, the body 11 and the U-shaped plate 13 are all separate structures.

[0048] In addition, refer to Figure 4 If the battery pack cover 1 does not include the U-shaped plate 13, the heat conducting fins 15 can be integrally formed with the body 11, which is convenient for the processing and forming of the battery pack cover 1. Of course, the heat conducting fins 15 can also be separately provided with the body 11, and the heat conducting fins 15 extend into the cooling channel 101, and can be connected to the body by bonding, welding, etc.

[0049] like Figure 1 As shown, the battery pack cover 1 includes a main body 11 and a connecting edge 12 arranged around the main body 11, and the connecting edge 12 is provided with a through hole for screws to pass through.

[0050] It can be understood that the battery pack cover 1 is connected to the box 3 of the battery pack through the connecting edge 12, specifically through screws. The box 3 is provided with threaded holes. The screws pass through the through holes and are screwed into the threaded holes to achieve the connection between the battery pack cover 1 and the box 3, which is convenient for the assembly and disassembly of the battery pack. Among them, there are multiple through holes, and the multiple through holes are arranged at intervals along the circumference of the body 11, that is, the battery pack cover 1 and the box 3 are connected by multiple screws, which can improve the connection strength and stability of the battery pack cover 1 and the box 3.

[0051] It should be noted that Figure 3The battery pack cover 1 shown in the figure includes the above-mentioned connecting edge 12, Figure 4 The battery pack cover 1 shown in FIG. 1 also includes the above-mentioned connecting edge 12 .

[0052] like Figure 1 As shown, the present disclosure further provides a battery pack, which includes a case 3, a battery group 2 and the above-mentioned battery pack cover 1, the battery group 2 includes a plurality of single cells 21, the battery pack cover 1 is connected to the case 3, and a receiving cavity for receiving the battery group 2 is formed therebetween, and the battery pack cover 1 abuts against the pole of the single cell 21.

[0053] Exemplarily, when the battery pack cover 1 includes the above-mentioned U-shaped plate 13, the U-shaped plate 13 abuts against the pole of the single battery 21. In other words, the U-shaped plate 13 is located in the accommodating cavity, and an exhaust channel for the single battery 21 in thermal runaway is formed between two adjacent U-shaped plates 13, which is beneficial to improving the safety performance of the battery pack.

[0054] It should be noted that the battery pack 2 includes a plurality of battery columns, each of which includes a plurality of single cells 21 . The plurality of single cells 21 of the battery column are arranged side by side along a first direction, and the large surfaces of two adjacent single cells 21 are in contact with each other. The plurality of battery columns are arranged side by side along a second direction.

[0055] Furthermore, when the single battery 21 is placed upright in the box 3, the battery pack cover 1 is the top cover of the battery pack, and the top cover is located above the battery group 2. When the single battery 21 is placed upside down in the box 3, the battery pack cover 1 is the bottom plate of the battery pack, and the bottom plate is located below the battery group 2. The single battery 21 is placed upright, which means that the pole of the single battery 21 faces upward, and the single battery 21 is placed upside down, which means that the pole of the single battery 21 faces downward.

[0056] Furthermore, the battery pack cover 1 is detachably connected to the box body 3 via the connecting edge 12. Specifically, the box body 3 is provided with a threaded hole matched with a screw, and the screw passes through the through hole on the connecting edge 12 and is screwed into the threaded hole to realize the detachable connection between the connecting edge 12 and the box body 3, thereby realizing the detachable connection between the battery pack cover 1 and the box body 3.

[0057] The present disclosure also provides a vehicle, which includes the above-mentioned battery pack. The vehicle has the technical effects of the battery pack in the above-mentioned embodiment, which will not be described in detail here.

[0058] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0059] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery pack cover, characterized in that: A box body suitable for connecting to a battery pack and abutting against the poles of the single cells of the battery pack, wherein a plurality of cooling channels are arranged inside the battery pack cover, wherein the cooling channels extend along a first direction, and a plurality of the cooling channels are arranged at intervals along a second direction, and the first direction and the second direction are respectively the length direction and the width direction of the battery pack cover.

2. The battery pack cover according to claim 1, characterized in that: The battery pack cover plate includes a plate-shaped body, and the cooling channel is provided in the body.

3. The battery pack cover according to claim 1, characterized in that: The battery pack cover includes an integrally formed main body and a plurality of U-shaped plates, the main body is in a plate shape, the plurality of U-shaped plates are arranged at intervals in the second direction, and the cooling channel is formed between the U-shaped plates and the main body.

4. The battery pack cover according to claim 3, characterized in that: The battery pack cover plate includes heat-conducting fins extending along the first direction, and at least one heat-conducting fin is disposed in each cooling channel.

5. The battery pack cover according to claim 3, characterized in that: The battery pack cover plate also includes a current collector having an inner channel, the current collector is connected to two adjacent U-shaped plates in the second direction, and the inner channel communicates with the two cooling channels.

6. The battery pack cover according to claim 3, characterized in that: In the second direction, any at least two adjacent cooling channels are connected in sequence to form a serpentine flow channel.

7. The battery pack cover according to claim 1, characterized in that: The battery pack cover includes a main body and a connecting edge arranged around the main body, and the connecting edge is provided with a through hole for screws to pass through.

8. A battery pack, characterized in that: It comprises a case, a battery pack and a battery pack cover as described in any one of claims 1-7, wherein the battery pack comprises a plurality of single cells, the battery pack cover is connected to the case, and a receiving cavity for receiving the battery pack is formed therebetween, and the battery pack cover abuts against the poles of the single cells.

9. A battery pack, characterized in that: It comprises a box body, a battery pack and a battery pack cover as described in any one of claims 3-6, wherein the battery pack comprises a plurality of single cells, the battery pack cover is connected to the box body, and a receiving cavity for receiving the battery pack is formed therebetween, and the U-shaped plate of the battery pack cover abuts against the pole of the single cell.

10. A vehicle, characterized in that: Comprising a battery pack as described in any one of claims 8 or 9.

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