CN219873690U

CN219873690U - Cooling device and battery pack

Info

Publication number: CN219873690U
Application number: CN202223466780.8U
Authority: CN
Inventors: 李周礼; 魏向辉; 李俭
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-12-23
Filing date: 2022-12-23
Publication date: 2023-10-20
Anticipated expiration: 2032-12-23

Abstract

The utility model relates to the technical field of batteries, in particular to a cooling device and a battery pack, which are used for cooling a battery module, wherein the battery module comprises a plurality of battery cell groups stacked along a first direction; the plurality of water cooling plate parts are communicated through the connecting parts to form a cooling fluid loop. According to the cooling device and the battery pack provided by the utility model, the contact area of the cooling device and the battery module is effectively increased, the cooling efficiency of the cooling device to the battery module is effectively improved, the probability of thermal runaway of the battery cell group is effectively reduced, and the use safety of the battery module is improved.

Description

Cooling device and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a cooling device and a battery pack.

Background

At present, in most of water-cooling plate designs, the water-cooling plate is generally arranged below the battery module, and a whole water-cooling plate is often responsible for heat dissipation work of all the battery cells in the battery module, the sum of the contact areas of the water-cooling plate and the battery cells is approximately equal to the sum of the bottom areas of the battery cells, the contact areas of the battery module and the water-cooling plate are small, heat dissipation of the battery cells is uneven, and heat dissipation effect is not ideal. The heat dissipation efficiency of the current water cooling plate is insufficient, heat is generated inside the battery cell and is difficult to transfer and dissipate by the water cooling plate, so that the battery cell is easy to generate a phenomenon of thermal runaway, and even the battery cell is exploded.

Disclosure of Invention

The utility model aims to provide a cooling device and a battery pack, which are used for solving the technical problems that a whole water cooling plate is responsible for heat dissipation of all battery cells in a battery module in the prior art to a certain extent, the sum of contact areas of the water cooling plate and the battery cells is approximately equal to the sum of bottom areas of the battery cells, the contact areas of the battery module and the water cooling plate are small, heat dissipation of the battery cells is uneven, and heat dissipation effect is not ideal.

According to a first aspect of the present utility model, there is provided a cooling device for cooling a battery module including a plurality of battery cell groups stacked in a first direction, the cooling device including a cooling assembly including:

the plurality of water-cooling plate parts and the plurality of battery cell groups are alternately arranged along the first direction;

and the plurality of water cooling plate parts are communicated through the connecting parts to form a cooling fluid loop.

Preferably, the connecting portion is a water-cooled side plate, the water-cooled side plate extends along the first direction, the water-cooled plate portion extends along the second direction, the plurality of water-cooled plate portions are all disposed on the same side of the water-cooled side plate in the second direction, and the second direction is perpendicular to the first direction.

Preferably, each water cooling plate portion includes a plurality of cooling channels, the cooling channels extend along the second direction, and the plurality of cooling channels are arranged side by side in the third direction, and the third direction is perpendicular to the first direction and the second direction respectively.

Preferably, for one of the water-cooled plate portions, in the third direction, a plurality of cooling channels are connected end to end in sequence, so that a plurality of the cooling channels form a serpentine flow passage.

Preferably, the water-cooled side plate includes a plurality of communication portions via which a plurality of the cooling passages communicate with the water-cooled side plate, and a plurality of connection portions alternately provided with the communication portions such that any adjacent two of the communication portions communicate via the connection portions.

Preferably, the water-cooled side plate further comprises a first interval part and a second interval part, the first interval part and the second interval part are alternately distributed on the connecting part along the first direction, and one of the connecting parts is provided with one first interval part or one second interval part;

the first interval part extends from the first end of the water-cooling side plate along a third direction, so that a first water passing gap is formed between the first interval part and the second end of the water-cooling side plate;

the second interval part extends from the second end of the water-cooling side plate along the third direction, so that a second water passing gap is formed between the second interval part and the first end of the water-cooling side plate, and the third direction is perpendicular to the first direction and the second direction respectively.

Preferably, the cooling device further comprises a water inlet part and a water outlet part, wherein the water inlet part is communicated with the cooling channel of one of the plurality of water cooling plate parts, and the water outlet part is communicated with the cooling channel of the other of the plurality of water cooling plate parts.

Preferably, the cooling device comprises a channel part and two cooling assemblies, and the channel part is respectively communicated with the water cooling plate parts of the two cooling assemblies.

Preferably, the water cooling plate portion communicating with the water inlet portion, the water outlet portion, or the passage portion among the plurality of water cooling plate portions is defined as a first cold water plate portion;

defining the other cold water plate portions of the plurality of water-cooled plate portions as second cold water plate portions;

the number of the cooling channels of the first cold water plate portion is one less than the number of the cooling channels of the second water cooling plate portion.

According to a second aspect of the present utility model, there is provided a battery pack comprising the cooling device according to any one of the above-mentioned aspects, and therefore, all the advantageous technical effects of the cooling device are provided, and further description thereof is omitted.

Compared with the prior art, the utility model has the beneficial effects that:

according to the cooling device provided by the utility model, the plurality of water-cooling plate parts and the plurality of battery cell groups which are communicated through the connecting part are alternately arranged along the first direction, so that the contact area between the cooling device and the battery module is effectively increased, heat between two adjacent battery cell groups can be transferred into the cooling fluid loop through the water-cooling plate parts arranged between the two adjacent battery cell groups and radiated out through the cooling fluid loop, the cooling efficiency of the cooling device on the battery module is effectively improved, the probability of thermal runaway of the battery cell groups is effectively reduced, and the use safety of the battery module is improved.

In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic top view of a cooling device according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a front view of a cooling device according to an embodiment of the present utility model;

FIG. 3 is a schematic front view of a water-cooled plate according to an embodiment of the present utility model;

fig. 4 is a schematic front view of a water-cooled side plate according to an embodiment of the present utility model.

Reference numerals:

a 100-cooling assembly; 110-a water-cooled plate portion; 120-water-cooling side plates; 1210-an edge communication portion; 1211-a mid-section communication section; 1212-connectivity interface; 1213-communicating with an inlet; 1214-a communication outlet; 122-linking moiety; 1221-a first spacer portion; 1222-a second spacer portion; 1223-a first water gap; 1224-a second water passing slit; 130-water inlet pipe; 140-a water outlet pipe; 150-communicating pipe; 200-cell group.

F1-a first direction; f2-a second direction; f3-third direction.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown.

The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model.

All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices 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.

A cooling device and a battery pack according to some embodiments of the present utility model are described below with reference to fig. 1 to 4.

Referring to fig. 1 to 4, the embodiment of the first aspect of the present utility model provides a cooling device for cooling a battery module including a plurality of battery cell groups 200 stacked along a first direction F1, the cooling device including a cooling assembly 100, the cooling assembly 100 including a plurality of water-cooling plate portions 110 and a connection portion, wherein the plurality of water-cooling plate portions 110 and the plurality of battery cell groups 200 are alternately arranged along the first direction F1, the plurality of water-cooling plate portions 110 are communicated via the connection portion to form a cooling fluid circuit, and thus, by alternately arranging the plurality of water-cooling plate portions 110 and the plurality of battery cell groups 200 communicated via the connection portion along the first direction F1, the contact area between the cooling device and the battery module is effectively increased, so that heat between two adjacent battery cell groups 200 can be transferred into the cooling fluid circuit via the water-cooling plate portions 110 arranged between the two adjacent battery cell groups 200 and dissipated via the cooling fluid circuit, the cooling efficiency of the cooling device to the battery module is effectively improved, the occurrence rate of heat generation of the battery cell groups 200 is effectively reduced, and the use safety of the battery module is improved.

Referring to fig. 1 to 4, a direction shown in F1 in the drawings may be an example of a first direction, a direction shown in F2 in the drawings may be an example of a second direction, and a direction shown in F3 in the drawings may be an example of a third direction. Preferably, any two of the first direction F1, the second direction F2, and the third direction F3 are perpendicular.

Preferably, as shown in fig. 2 and 3, each water-cooled plate portion 110 may include a plurality of cooling channels extending along the second direction F2, and a plurality of the cooling channels are disposed side by side in the third direction F3, so as to increase the area through which the cooling fluid of the water-cooled plate portion 110 can flow, thereby further increasing the cooling efficiency of the cooling device.

Preferably, as shown in fig. 2 and 3, for one water-cooling plate portion 110, in the third direction F3, the plurality of cooling channels are connected end to end in sequence, so that the plurality of cooling channels form a serpentine flow channel, so that the cooling fluid flowing into the water-cooling plate portion 110 can circulate in a single direction, and the circulation fluidity of the cooling fluid of the water-cooling plate portion 110 is ensured.

In an embodiment, as shown in fig. 1 and 4, the connecting portion may be a water-cooled side plate 120, where the water-cooled side plate 120 extends along the first direction F1, the water-cooled side plate 110 extends along the second direction F2, and the plurality of water-cooled side plate 110 are disposed on the same side of the water-cooled side plate 120 in the second direction F2, so as to further increase the contact area between the cooling device and the battery module, and further improve the cooling efficiency of the cooling device on the battery module.

Preferably, the plurality of cooling channels are respectively communicated with the water-cooled side plate 120, so that the cooling fluid in each cooling channel can flow back to the water-cooled side plate 120.

Preferably, as shown in fig. 2 to 4, the water-cooled side plate 120 may include a plurality of communication parts, and the number of communication parts may be equal to the number of the water-cooled plate parts 110 described above. The water-cooling plate 110 communicates with the water-cooling side plate 120 via the communication portion, so that the cooling fluid in the water-cooling side plate 120 flows back through the water-cooling side plate 120.

Preferably, as shown in fig. 4, taking one communication portion and one water-cooled plate portion 110 butted against each other as an example, the communication portion may include a plurality of communication interfaces 1212 stacked in the third direction F3, the number of the communication interfaces 1212 being equal to the number of the cooling channels of the water-cooled plate portion 110, and the same ends of the plurality of cooling channels in the second direction F2 are respectively communicated with their corresponding communication interfaces 1212.

As an example in which the right side is the upstream side of the cooling fluid is shown in fig. 4, in order to clarify the flow direction of the cooling fluid in the water-cooled side plate 120, the "o" is indicated as the direction in which the flow direction of the water-cooled side plate 120 is from the paper surface inner side to the paper surface outer side in the second direction F2; the "x" indicates that the flow direction of the water-cooled side plate 120 is a direction from the outside side to the inside side of the paper surface in the second direction F2.

Preferably, as shown in fig. 4, the above-described plurality of communication portions may be divided into a middle communication portion 1211 and an edge communication portion 1210 according to positions provided in the first direction F1, wherein the edge communication portion 1210 is two of the plurality of communication portions located at both ends.

Preferably, as shown in fig. 4, an upstream one of the two side communication portions 1210 may include a communication inlet 1213, and a downstream one of the two side communication portions 1210 may include a communication outlet 1214 to enable unidirectional flow of the cooling fluid within the water cooled side plate 120. The "in and out" referred to by both the communication inlet 1213 and the communication outlet 1214 may be understood as interfaces with respect to the inflow or outflow of the water-cooled side plate 120, in other words, the flow direction of the communication inlet 1213 is "o" and the flow direction of the communication outlet 1214 is "x".

Preferably, as shown in fig. 4, among the communication interfaces 1212 of the above-described middle communication portion 1211, the communication interfaces 1212 at both ends in the third direction F3 are formed as one communication inlet 1213 and one communication outlet 1214, respectively.

Preferably, the number of the cooling passages of the water-cooling plate portion 110 communicating with the side portion communicating portion 1210 is one less than the number of the cooling passages of the water-cooling plate portion 110 communicating with the middle portion communicating portion 1211 (of the water-cooling plate portion 110 and the communicating portion corresponding to each other, the number of the water-cooling plate portion 110 and the communicating port 1212 is equal, and the number of the cooling passages of the water-cooling plate portion 110 corresponding thereto may be fed back through the number of the communicating port 1212, see fig. 4), and the one more cooling passage may be used to communicate with the water inlet pipe 130, the water outlet pipe 140 or the connection pipe described below, in other water-cooling plate portions 110 among the plurality of water-cooling plate portions 110 may be defined as the first cold water plate portion for convenience of description. Wherein the number of cooling channels of the first cold water plate part is one less than the number of cooling channels of the second cold water plate part.

Preferably, as shown in fig. 4, the water-cooled side plate 120 may further include connection portions 122, and the connection portions 122 are alternately disposed with the communication portions such that any adjacent two communication portions communicate via the connection portions 122.

Preferably, as shown in fig. 4, the above-mentioned connection portion 122 communicates with the communication portion via the communication inlet 1213 and the communication outlet 1214, wherein the communication inlet 1213 may be understood as a communication interface 1212 allowing the cooling fluid to flow into the connection portion 122 and the communication outlet 1214 may be understood as a communication interface 1212 allowing the cooling fluid to flow out of the connection portion 122.

Preferably, as shown in fig. 4, for the two communicating portions located at both sides of the connecting portion 122, both the communicating inlet 1213 and the communicating outlet 1214 communicating with the connecting portion 122 are oppositely provided at the upper end or the lower end of the connecting portion 122 in the third direction F3.

Further, as shown in fig. 4, the water-cooled side plate 120 may further include a first spacing portion 1221 and a second spacing portion 1222, where the first spacing portion 1221 and the second spacing portion 1222 are alternately distributed in the connecting portion 122 along the first direction F1, and any of the connecting portions 122 is provided with a first spacing portion 1221 or a second spacing portion 1222 to extend a path of the cooling fluid flowing in the connecting portion 122, so as to increase a cooling fluid flowing area of the water-cooled side plate 120, thereby improving a cooling efficiency of the water-cooled side plate 120.

Preferably, as shown in fig. 4, the first interval portion 1221 extends from the upper end of the water-cooled side plate 120 in the third direction F3 such that a first water passing gap 1223 is formed between the first interval portion 1221 and the lower end of the water-cooled side plate 120. Optionally, the first partition 1221 is disposed in the connection portion 122 at the upper end of the connection portion 122, where the communication inlet 1213 and the communication outlet 1214 that are in communication with the first partition 1221 are located in the connection portion 122 at the upper end, so that, referring to the flow path of the cooling fluid in the connection portion 122 shown by the arrows in fig. 4, after the cooling fluid enters the connection portion 122 through the connection inlet, the cooling fluid flows down to the first water gap 1223 along the third direction F3 by being blocked by the first partition 1221, passes across the first partition 1221 by the first water gap 1223, flows up to the communication outlet 1214 along the third direction F3, and flows to the downstream water-cooled plate 110 through the communication outlet 1214, so as to effectively prolong the area through which the cooling fluid flows on the water-cooled side plate 120.

Similarly, as shown in fig. 4, the second interval portion 1222 extends from the lower end of the water-cooled side plate 120 in the third direction F3 such that a second water passing slit 1224 is formed between the second interval portion 1222 and the upper end of the water-cooled side plate 120. Correspondingly, the second interval portion 1222 is disposed in the connection portion 122 at the lower end of the connection portion 122, and the communication inlet 1213 and the communication outlet 1214 that are in communication with the second interval portion 1222 are disposed in a similar manner to the first interval portion 1221, which will not be repeated.

Preferably, as shown in fig. 1 and 2, the cooling device may further include a water inlet portion, which may be formed as a water inlet pipe 130, and the water inlet pipe 130 may communicate with a cooling passage of one of the plurality of water cooling plate portions 110 to supply the cooling fluid to the above-mentioned cooling fluid circuit.

Preferably, as shown in fig. 1 and 2, the water inlet pipe 130 may be connected to the water cooling plate portion 110 at one end of the water cooling side plate 120 in the first direction F1, so as to further ensure the unidirectional flow of the cooling fluid, thereby ensuring the circulation of the cooling fluid.

Further, as shown in fig. 2, in the water-cooled plate part 110 communicating with the water inlet pipe 130, the water inlet pipe 130 may communicate with the right end of the cooling passage at the lower end in the water-cooled plate part 110 as the upstream end of the above-mentioned cooling fluid circuit.

Preferably, as shown in fig. 1 and 2, the cooling device may further include a water outlet portion, which may be formed as a water outlet pipe 140, and the water outlet pipe 140 may communicate with a cooling passage of another one of the plurality of water cooling plate portions 110 to flow out the cooling fluid in the cooling fluid circuit.

Optionally, the water outlet pipe 140 may be connected to the cooling channels of the cooling assembly 100 at the downstream end, so that the cooling fluid in all the cooling channels of the cooling assembly 100 can be discharged through the water outlet pipe 140, thereby further ensuring the unidirectional flow of the cooling fluid and further ensuring the circulability of the cooling fluid.

In an embodiment, as shown in fig. 1 and 2, preferably, the number of the above-mentioned battery modules may be two, and correspondingly, the cooling device may include a channel part and two cooling modules 100, the channel parts respectively communicating with the water cooling plate parts 110 of the two cooling modules 100 to achieve communication of cooling fluid circuits of the two cooling modules 100.

Alternatively, as shown in fig. 1 and 2, the two cooling assemblies 100 may be symmetrically disposed with respect to a plane defined by both the first direction F1 and the third direction F3.

Preferably, the above-described passage portion may be formed as a communication pipe 150 extending in the second direction F2 for communicating a downstream end of a first one of the two cooling modules 100 and for communicating an upstream end of a second one of the two cooling modules 100.

Preferably, as shown in fig. 1 and 2, the water outlet pipe 140 communicates with the downstream end of the second of the two cooling modules 100 to achieve consistency of the return directions of the cooling fluid circuits of the two cooling modules 100, further ensuring unidirectional flow of the cooling fluid in the cooling device, and further ensuring circulability of the cooling fluid.

In addition, the water-cooled plate portion 110 and the water-cooled side plate 120 may be both formed as stamped water-cooled plates. Specifically, the stamping water-cooling plate may include a flow channel plate and a cover plate, the flow channel plate may be formed with grooves provided in accordance with the above-described cooling fluid circuit (for example, grooves of the stamping water-cooling plate as the water-cooling plate portion 110 may be provided in accordance with the shape of the above-described cooling channel; for example, grooves of the stamping water-cooling plate as the water-cooling side plate 120 may be provided in accordance with the shape of the above-described communication portion, the connection portion 122, the first spacing portion 1221, and the second spacing portion 1222), the grooves may be provided in a structure in which a plate material is obtained via a stamping action, and the cover plate and the flow channel plate will be connected by welding such that the grooves are sealed by the cover plate to form the above-described cooling fluid circuit. The manufacturing process of the stamping water-cooling plate is the prior art in the field and is not repeated.

The embodiment of the second aspect of the present utility model further provides a battery pack, which includes the cooling device according to any one of the embodiments, so that the cooling device has all the beneficial technical effects, and will not be described herein.

Preferably, the battery pack may further include the above battery module.

Preferably, as shown in fig. 1 and 2, the number of battery modules may be two to accommodate the above-described two cooling assemblies 100.

Preferably, for any one of the battery modules, the battery module includes a predetermined number of the battery cell groups 200, the predetermined number of the battery cell groups 200 being stacked in the first direction F1, as shown in fig. 1, which illustrates an example in which the number of the battery cell groups 200 is 3, but not limited thereto, the number of the battery cell groups 200 may be adaptively adjusted according to the requirements of the battery pack and the circulation driving ability of the cooling fluid.

Preferably, as shown in fig. 1, each cell group 200 may include two cells, and when the cell groups 200 and the water-cooling plate portions 110 are alternately arranged, each cell can be attached to one water-cooling plate portion 110, so that the cooling efficiency of the cooling device is effectively improved.

Further, as shown in fig. 1, the battery module further includes two separate battery cells, and the two separate battery cells may be disposed on two sides of the cooling assembly 100 in the first direction F1, respectively, so as to further improve the cooling efficiency of the cooling device.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims

1. A cooling device for cooling a battery module including a plurality of battery cell groups stacked in a first direction, the cooling device comprising a cooling assembly comprising:

2. The cooling device of claim 1, wherein the connection portion is a water-cooled side plate, the water-cooled side plate extends along the first direction, the water-cooled plate portion extends along a second direction, the plurality of water-cooled plate portions are all disposed on a same side of the water-cooled side plate in the second direction, and the second direction is perpendicular to the first direction.

3. The cooling device of claim 2, wherein each of the water-cooled plate portions includes a plurality of cooling channels extending along the second direction, the plurality of cooling channels being disposed side-by-side in a third direction, the third direction being perpendicular to the first and second directions, respectively.

4. A cooling device according to claim 3, wherein for one of the water-cooled plate portions, a plurality of cooling channels are connected end to end in the third direction in order such that a plurality of the cooling channels form a serpentine flow passage.

5. A cooling device according to claim 3, wherein the water-cooled side plate includes a plurality of communication portions via which a plurality of the cooling passages communicate with the water-cooled side plate, and a plurality of connection portions alternately arranged with the communication portions such that any adjacent two of the communication portions communicate via the connection portions.

6. The cooling apparatus according to claim 5, wherein the water-cooled side plate further includes first and second spacing portions alternately distributed in the first direction at the connecting portions, either one of the connecting portions being provided with one of the first spacing portions or one of the second spacing portions;

7. The cooling device according to any one of claims 3 to 6, further comprising a water inlet portion that communicates with the cooling passage of one of the plurality of water-cooled plate portions and a water outlet portion that communicates with the cooling passage of another one of the plurality of water-cooled plate portions.

8. The cooling device of claim 7, comprising a channel portion and two cooling modules, the channel portion being in communication with the water cooled plate portions of the two cooling modules, respectively.

9. A cooling device according to claim 8, wherein,

defining the water cooling plate part communicated with the water inlet part, the water outlet part or the channel part of the plurality of water cooling plate parts as a first cold water plate part;

10. A battery pack comprising the cooling device according to any one of claims 1 to 9.