CN219959162U

CN219959162U - Battery pack

Info

Publication number: CN219959162U
Application number: CN202320997373.5U
Authority: CN
Inventors: 高玉婷; 范光辉
Original assignee: Xinwangda Power Technology Co ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2023-04-24
Filing date: 2023-04-24
Publication date: 2023-11-03
Anticipated expiration: 2033-04-24

Abstract

The utility model relates to the technical field of energy storage devices and discloses a battery pack which comprises a liquid cooling bottom plate, a liquid cooling side plate and a battery pack, wherein a first liquid port and a second liquid port which are communicated with a first flow channel are arranged at two ends of the liquid cooling bottom plate along a first direction, a third liquid port and a fourth liquid port which are communicated with a second flow channel are arranged at two ends of the liquid cooling side plate along the first direction, liquid is fed from the liquid cooling bottom plate and then discharged from the liquid cooling side plate, and liquid is fed from the liquid cooling side plate and then discharged from the liquid cooling side plate, so that backflow of cooling liquid can be formed, and the part, close to the rear end, of the battery pack is compensated on the heat absorption effect, so that the heat exchange performance and the overall temperature uniformity of the battery pack are improved.

Description

Battery pack

Technical Field

The utility model relates to the technical field of energy storage devices, in particular to a battery pack.

Background

With the gradual development of electric vehicles, the requirements of electric vehicle battery packs on temperature are increasingly increased. At present, the flow direction of cooling water in a liquid cooling plate of a battery pack is single, and is usually from one end of the liquid cooling plate to the other end, and the temperature of the part of the battery pack in the rear end of the battery pack is higher than that of the part in the front end of the battery pack, so that the temperature uniformity of the whole battery pack is poor.

Disclosure of Invention

The purpose of the utility model is that: provided is a battery pack, wherein the temperature uniformity of the whole battery pack can be improved.

In order to achieve the above object, the present utility model provides a battery pack comprising:

a liquid-cooled bottom plate having a first flow channel, a first liquid port and a second liquid port in communication with the first flow channel; the first liquid port and the second liquid port are sequentially arranged at two ends of the liquid cooling bottom plate along a first direction;

the liquid cooling side plates are provided with a plurality of liquid cooling bottom plates, extend along a third direction and are arranged on the liquid cooling bottom plates at intervals along a second direction, and an installation space is formed between two adjacent liquid cooling side plates and the liquid cooling bottom plates, and corresponds to the position of the first flow channel; the liquid cooling side plate is provided with a second flow channel, a third liquid port and a fourth liquid port which are communicated with the second flow channel, and the third liquid port and the fourth liquid port are sequentially arranged at two ends of the liquid cooling side plate along the first direction;

a battery pack mounted in the mounting space; the battery pack comprises a first cooling surface which is attached to the liquid cooling bottom plate and a second cooling surface which is attached to the liquid cooling side plate;

wherein the first liquid port is communicated with the third liquid port so as to enable the first flow channel to be communicated with the second flow channel;

the first direction is the length direction of the battery pack, the second direction is the width direction of the battery pack, the third direction is the height direction of the battery pack, and the first direction, the second direction and the third direction are perpendicular to each other.

In some embodiments of the present utility model, the first flow channel, the installation space, and the battery pack are all plural and equal in number; each first runner corresponds to each installation space one by one; each battery pack is arranged in each installation space in a one-to-one correspondence.

In some embodiments of the utility model, the first flow path includes a plurality of sub-flows, each of the sub-flows being in communication with the second flow path adjacent thereto.

In some embodiments of the utility model, each of the substreams is serpentine in shape.

In some embodiments of the utility model, the plurality of substreams are spaced apart along the second direction;

the tributaries corresponding to the first cooling surface of each battery pack are respectively communicated with the second flow channels corresponding to the second cooling surface of the battery pack.

In some embodiments of the utility model, the liquid cooling bottom plate further has a first total flow channel, which is communicated with each of the tributaries and is located on the same side of the battery pack in the length direction as the second liquid port and the fourth liquid port.

In some embodiments of the present utility model, a first communication pipe is further included, through which the first flow passage and the second flow passage are communicated.

In some embodiments of the present utility model, the liquid cooling bottom plate further has a second total flow channel, which is connected to each second flow channel and is located on the same side of the battery pack in the length direction as the second liquid port and the fourth liquid port.

In some embodiments of the utility model, the device further comprises a second communicating pipe, and each second flow passage is communicated with the second main flow passage through the second communicating pipe.

In some embodiments of the utility model, the liquid cooled side plate is a harmonica tube plate and the channel inside the harmonica tube plate is the second flow channel.

Compared with the prior art, the utility model provides a battery pack, which has the beneficial effects that:

according to the battery pack, the first liquid port and the second liquid port which are communicated with the first flow channel are arranged at two ends of the liquid cooling bottom plate along the first direction, and the third liquid port and the fourth liquid port which are communicated with the second flow channel are arranged at two ends of the liquid cooling side plate along the first direction. When the second liquid port is used as a liquid inlet, the cooling liquid flows to the first liquid port in the first direction, namely reaches the rear end of the flow direction, and flows back to the fourth liquid port from the third liquid port along the first direction to form the reflux of the cooling liquid; when the fourth liquid port is used as the liquid inlet, the cooling liquid flows to the third liquid port in the first direction, namely reaches the rear end of the flow direction, and flows back to the second liquid port from the first liquid port along the first direction, so that the backflow of the cooling liquid is formed. Through the backward flow of coolant liquid, can compensate the part that the group battery is close to the stream to the rear end on the heat absorption effect to improve heat transfer performance and the holistic samming nature of battery package.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the present utility model.

Fig. 2 is a schematic diagram of a liquid-cooled bottom plate and liquid-cooled side plates according to an embodiment of the utility model.

Fig. 3 is an enlarged schematic view at a in fig. 2.

FIG. 4 is a schematic view of another angle of a liquid-cooled bottom plate and liquid-cooled side plates according to an embodiment of the utility model.

Fig. 5 is an enlarged schematic view at B in fig. 4.

In the figure, 1, a battery pack; 2. a liquid-cooled bottom plate; 3. a liquid cooling side plate; 4. a first communication pipe; 5. a second communicating pipe; 21. a first flow passage; 211. a first liquid port; 212. a second liquid port; 213. a tributary; 22. a first total flow path; 23. a second total flow path; 31. a third liquid port; 32. a fourth liquid port; 33. a second flow passage;

x, a first direction; y, second direction; and Z is in the third direction.

Detailed Description

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1, a battery pack according to a preferred embodiment of the present utility model includes a battery pack 1, a liquid-cooled bottom plate 2 and a liquid-cooled side plate 3.

The liquid-cooled bottom plate 2 has a first flow path 21, a first liquid port 211 and a second liquid port 212 communicating with the first flow path 21; the first liquid port 211 and the second liquid port 212 are provided at both ends of the liquid-cooled bottom plate 2 in this order along the first direction X.

The second liquid port 212 may be used as a liquid inlet or a liquid outlet.

The liquid cooling side plates 3 are provided with a plurality of liquid cooling side plates 3, the liquid cooling side plates 3 extend along a third direction Z and are arranged on the liquid cooling bottom plate 2 at intervals along a second direction Y, and an installation space corresponding to the position of the first flow channel 21 is formed between every two adjacent liquid cooling side plates 3 and the liquid cooling bottom plate 2; the liquid-cooled side plate 3 has a second flow passage 33, and a third liquid port 31 and a fourth liquid port 32 communicating with the second flow passage 33, the third liquid port 31 and the fourth liquid port 32 being provided at both ends of the liquid-cooled side plate 3 in this order along the first direction X. The fourth liquid port 32 may be a liquid inlet or a liquid outlet. The battery pack 1 is installed in the installation space. The battery pack 1 includes a plurality of unit cells arranged in the first direction X. In other embodiments, the battery pack 1 has a plurality of single cells arranged along the second direction Y in addition to the plurality of single cells arranged along the first direction X, the end of the battery pack in the first direction X may be provided with an end plate, the end of the battery pack in the second direction Y may be provided with a side plate to form a battery module, and the battery module may be installed in the installation space.

The battery pack 1 includes a first cooling surface attached to the liquid-cooled bottom plate 2 and a second cooling surface attached to the liquid-cooled side plate 3. The second cooling surface is two side surfaces of the battery pack 1 which are arranged in the second direction Y and are away from each other, and the two side surfaces are respectively attached to the corresponding liquid-cooled side plates 3.

Wherein the first liquid port 211 communicates with the third liquid port 31 to communicate the first flow channel 21 with the second flow channel 33.

The first direction X is the length direction of the battery pack 1, the second direction Y is the width direction of the battery pack 1, the third direction Z is the height direction of the battery pack, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

When the second liquid port 212 is used as a liquid inlet, the liquid inlet is used as a starting end at this time, the cooling liquid flows to the first liquid port 211 in the first direction X, i.e. reaches the rear end of the flow direction, and flows back to the fourth liquid port 32 from the third liquid port 31 in the first direction X, i.e. flows back to the starting end, so as to form a backflow of the cooling liquid; when the fourth liquid port 32 is used as the liquid inlet, the cooling liquid flows to the third liquid port 31 in the first direction X, i.e., to the rear end of the flow direction, and flows back from the first liquid port 211 to the second liquid port 212 in the first direction X, i.e., to the start end, and the back flow of the cooling liquid is also formed. When the cooling liquid just enters the battery pack 1 from the liquid inlet to absorb heat, more heat can be absorbed, the temperature of the cooling liquid rises along with the flowing of the cooling liquid to the rear end, the heat absorption effect of the battery pack 1 is poor, the cooling liquid flows back, the temperature of the cooling liquid still rises gradually, the heat absorption effect of the battery pack 1 is poor, the part, close to the rear end, of the battery pack 1 can be compensated in the heat absorption effect, and therefore the heat exchange performance and the overall temperature uniformity of the battery pack are improved.

In the present embodiment, the first flow channels 21, the installation space, and the battery packs 1 are all plural and equal in number; each first runner 21 corresponds to each installation space one by one; each battery pack 1 is disposed in each installation space in one-to-one correspondence. In this arrangement, each battery pack 1 is mounted in one mounting space, and each battery pack 1 has three faces to be cooled, so that the cooling effect is better, and the effect of improving the temperature uniformity is also better. The installation space may be adaptively set according to the specific specification of the battery pack 1.

The first flow channels 21 may be provided in a plurality, the first flow channels 21 are disposed on the liquid cooling bottom plate 1, specifically, the first flow channels 21 may be disposed in a serpentine shape, for example, the first flow channels 21 are disposed in an S-shape or in a "back" shape, and the specific shape of the first flow channels 21 may be set according to practical situations. In the present embodiment, the first flow channels 21 are in one-to-one correspondence with the installation spaces, and in other embodiments, one first flow channel 21 may be provided to correspond to a plurality of installation spaces. In specific implementation, the setting can be carried out according to actual needs.

Referring to fig. 2 and 4, the first flow channel 21 includes a plurality of sub-flows 213, and each sub-flow 213 is in communication with the adjacent second flow channel 33. Each group of the first flow passages 21 in the present embodiment includes two sub-flows 213 which are juxtaposed and respectively communicate with the liquid-cooled side plates 3 on both sides of the installation space.

In other embodiments, more sub-streams 213 may be provided, where the sub-streams 213 are divided into two portions of the liquid-cooled side plate 3 near two sides of the installation space, and each of the sub-streams 213 is in communication with the corresponding liquid-cooled side plate 3.

Each substream 213 is serpentine in configuration. In the present embodiment, each of the sub-streams 213 is bent twice, in other words, each of the sub-streams 213 changes the flow direction of the cooling liquid twice. In other embodiments, the number of times that the tributary 213 changes the coolant flow direction may be set to be larger, as long as it is ensured that the inlet and the outlet of the tributary 213 are sequentially set at both ends of the liquid-cooled side plate 3 in the first direction X.

The plurality of tributaries 213 are spaced apart along the second direction Y. The branch flow 213 corresponding to the first cooling surface of each battery pack 1 communicates with the second flow passage 33 corresponding to the second cooling surface of the battery pack 1, respectively. By this arrangement, different branches 213 communicating with different liquid cooling side plates 3 can be prevented from being staggered, and the implementation is facilitated.

The second flow passage 33 may be provided in plural, and may be provided in a meandering manner. In this embodiment, the liquid-cooled side plate 3 is a harmonica tube plate, and the channel inside the harmonica tube plate is the second flow channel 33.

Referring to fig. 2 and 4, the liquid cooling bottom plate 2 further has a first total flow channel 22, which is in communication with each of the tributaries 213 and is located on the same side in the longitudinal direction of the battery pack 1 as the second liquid port 212 and the fourth liquid port 32. The first total flow passage 22 is required to pass through either the first flow passage 21 or the second flow passage 21, so that the cooling liquid can flow into or out of the liquid-cooled bottom plate 2 during production.

Referring to fig. 3, the battery pack further includes a first communication pipe 4, and the first flow channel 21 and the second flow channel 33 are communicated through the first communication pipe 4. Specifically, in the present embodiment, each of the tributaries 213 communicates with the second flow passage 33 of its corresponding liquid-cooled side plate 3 through the first communication pipe 4. In other embodiments, a structure similar to a flow channel plate may be disposed at a liquid port of each of the tributaries 213 near the third liquid port 31, so as to communicate the first flow channel 21 and the second flow channel 33.

The liquid cooling bottom plate 2 is also provided with a second main flow passage 23 which is communicated with each second flow passage 33 and is positioned on the same side of the battery pack 1 in the length direction as the second liquid port 212 and the fourth liquid port 32. The second manifold 23 is similar to the first manifold 22, but is designed to facilitate the flow of coolant into or out of the liquid cooled side plate 3 during production runs.

Referring to fig. 5, the battery pack further includes second communication pipes 5, and each second flow channel 33 is communicated with the second main flow channel 23 through the second communication pipe 5, so as to realize communication between the second flow channel 33 and the second main flow channel 23.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.

Claims

1. A battery pack, comprising:

a liquid-cooled bottom plate (2) having a first flow channel (21), a first liquid port (211) and a second liquid port (212) communicating with the first flow channel (21); the first liquid port (211) and the second liquid port (212) are sequentially arranged at two ends of the liquid cooling bottom plate (2) along a first direction (X);

the liquid cooling side plates (3) are provided with a plurality of liquid cooling bottom plates (2) which extend along a third direction (Z) and are arranged on the liquid cooling bottom plates (2) at intervals along a second direction (Y), and an installation space is formed between every two adjacent liquid cooling side plates (3) and the liquid cooling bottom plates (2), and corresponds to the position of the first flow channel (21); the liquid cooling side plate (3) is provided with a second flow channel (33) and a third liquid port (31) and a fourth liquid port (32) which are communicated with the second flow channel (33), and the third liquid port (31) and the fourth liquid port (32) are sequentially arranged at two ends of the liquid cooling side plate (3) along the first direction (X);

a battery pack (1) mounted in the mounting space; the battery pack (1) comprises a first cooling surface which is attached to the liquid cooling bottom plate (2) and a second cooling surface which is attached to the liquid cooling side plate (3);

wherein the first liquid port (211) is communicated with the third liquid port (31) so as to enable the first flow channel (21) to be communicated with the second flow channel (33);

the first direction (X) is the length direction of the battery pack (1), the second direction (Y) is the width direction of the battery pack (1), the third direction (Z) is the height direction of the battery pack (1), and the first direction (X), the second direction (Y) and the third direction (Z) are perpendicular to each other.

2. The battery pack according to claim 1, wherein:

the first flow channels (21), the installation space and the battery packs (1) are all multiple and equal in number; each first runner (21) corresponds to each installation space one by one; the battery packs (1) are arranged in the installation spaces in a one-to-one correspondence.

3. The battery pack according to claim 2, wherein:

the first flow channel (21) comprises a plurality of sub-flows (213), each sub-flow (213) being in communication with the adjacent second flow channel (33).

4. A battery pack according to claim 3, wherein:

each of the tributaries (213) is meandered.

5. A battery pack according to claim 3, wherein:

-said plurality of substreams (213) being arranged at intervals along said second direction;

the tributaries (213) corresponding to the first cooling surface of each battery pack (1) are respectively communicated with the second flow channels (33) corresponding to the second cooling surface of the battery pack (1).

6. A battery pack according to claim 3, wherein:

the liquid cooling bottom plate (2) is also provided with a first total flow channel (22) which is communicated with each tributary (213) and is positioned on the same side of the battery pack (1) in the length direction with the second liquid port (212) and the fourth liquid port (32).

7. The battery pack according to claim 1, wherein:

the device also comprises a first communication pipe (4), wherein the first flow passage (21) and the second flow passage (33) are communicated through the first communication pipe (4).

8. A battery pack according to claim 3, wherein:

the liquid cooling bottom plate (2) is also provided with a second main flow channel (23) which is communicated with each second flow channel (33) and is positioned on the same side of the battery pack (1) in the length direction with the second liquid port (212) and the fourth liquid port (32).

9. The battery pack of claim 8, wherein:

and the device also comprises second communicating pipes (5), wherein each second flow passage (33) is communicated with the second main flow passage (23) through the second communicating pipes (5).

10. The battery pack according to claim 1, wherein:

the liquid cooling side plate (3) is a harmonica tube plate, and a channel inside the harmonica tube plate is the second flow channel (33).