CN219873693U - Battery module, battery pack and electricity utilization device - Google Patents

Abstract

The utility model relates to a battery module, which comprises a bottom plate, a first cooling plate, a plurality of battery cells and a second cooling plate. The first cooling plate and the second cooling plate are respectively provided with a first flow channel and a second flow channel through which cooling liquid flows, and the cooling liquid can flow through the first flow channel and the second flow channel in the charging and discharging process. The bottom of each battery cell is contacted with the first cooling plate, so that the cooling liquid can take heat away from the bottom of the battery cell when flowing through the first flow channel; and because the side surface of each battery cell is contacted with the second cooling plate, the cooling liquid can take away heat from the side surface of the battery cell when flowing through the second flow channel. Therefore, the area of each battery cell surface for heat dissipation is increased, and the cooling efficiency of the battery module can be improved. In addition, the utility model also provides a battery pack and an electric device.

Description

Battery module, battery pack and electricity utilization device

Technical Field

The utility model relates to the technical field of new energy, in particular to a battery module, a battery pack and an electric device.

Background

With the increasing importance of environmental protection, electric vehicles are gradually becoming mainstream, and lithium batteries as power sources of electric vehicles are becoming a current research hotspot. The lithium battery generates a great deal of heat in the charge and discharge process, so that the temperature is increased, and the performance and the service life of the lithium battery are greatly affected by the temperature. Therefore, the battery cells are integrated with a corresponding cooling scheme to control the temperature at which they operate.

Conventional liquid cooling schemes typically employ serpentine tubes disposed between the cells. The flow passage is formed in the serpentine tube, and the cooling liquid can cool the side surface of the battery cell when flowing through the serpentine tube. However, the cooling efficiency is relatively low because the wrap angle area between the coil and the battery cell is small. Particularly, under the premise of fast charge and ultra-fast charge popularization, the traditional cooling scheme cannot meet the cooling requirement of the battery.

Disclosure of Invention

In view of the above, it is necessary to provide a battery module capable of improving cooling efficiency in view of the above-described problems.

A battery module, comprising:

a bottom plate;

the first cooling plate is arranged on the bottom plate, and a first flow passage for cooling liquid to flow through is formed in the first cooling plate;

the battery cells are borne on the first cooling plate, and the bottom of each battery cell is contacted with the first cooling plate; a kind of electronic device with high-pressure air-conditioning system

The second cooling plates are arranged among the plurality of battery cells, the side faces of each battery cell are contacted with the second cooling plates, and second flow channels for cooling liquid to flow through are formed in the second cooling plates.

In one embodiment, an explosion-proof valve is provided on each of the battery cells.

In one embodiment, the explosion-proof valve is disposed at the bottom of the battery cell, the first cooling plate is disposed at intervals with the bottom plate, so that a buffer cavity is formed between the first cooling plate and the bottom plate, a plurality of avoidance holes communicated with the buffer cavity are respectively formed in positions of the first cooling plate corresponding to the battery cells, and each explosion-proof valve of the battery cell is located in a range of the corresponding avoidance hole.

In one embodiment, the plurality of battery cells are arranged in a plurality of rows on the first cooling plate, the plurality of avoidance holes are correspondingly arranged in a plurality of rows, and a partition plate is arranged between the bottom plate and the first cooling plate to divide the buffer cavity into a plurality of exhaust channels arranged in parallel, and each row of avoidance holes is communicated with one exhaust channel.

In one embodiment, a plurality of the battery cells are arranged in a plurality of rows on the first cooling plate, and the second cooling plate sequentially passes between two adjacent rows of the battery cells.

In one embodiment, the battery cells are cylindrical, two opposite surfaces of the second cooling plate are respectively provided with an arc-shaped groove, and each side wall of each battery cell is partially accommodated in each arc-shaped groove.

In one embodiment, two adjacent rows of the battery cells are staggered by a preset distance along the arrangement direction, and the preset distance is equal to the radius of the battery cells.

In one embodiment, the surface of the first cooling plate is formed with a mounting groove, and the second cooling plate is disposed in the mounting groove.

The battery module can enable the cooling liquid to flow through the first flow channel and the second flow channel in the charging and discharging process. The bottom of each battery cell is contacted with the first cooling plate, so that the cooling liquid can take heat away from the bottom of the battery cell when flowing through the first flow channel; and because the side surface of each battery cell is contacted with the second cooling plate, the cooling liquid can take away heat from the side surface of the battery cell when flowing through the second flow channel. Therefore, the area of each battery cell surface for heat dissipation is increased, and the cooling efficiency of the battery module can be improved.

In addition, the utility model also provides a battery pack and an electric device.

A battery pack comprising a plurality of battery modules as described in any one of the above preferred embodiments.

An electrical device comprising the battery module of any one of the above preferred embodiments or the battery pack of the above preferred embodiments.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is an isometric view of a battery module according to a preferred embodiment of the present utility model;

fig. 2 is a top view of the battery module shown in fig. 1.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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 device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

The utility model discloses an electric device, a battery pack and a battery module. The electric device can be a vehicle, a mobile phone, portable equipment, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, energy storage equipment, recreation equipment, an elevator, lifting equipment and the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, or an electric plane toy, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, electric planers, and the like; the energy storage device can be an energy storage wall, a base station energy storage, a container energy storage and the like; the amusement device may be a carousel, a stair jump machine, or the like. The present utility model does not particularly limit the above-described power consumption device.

For pure electric vehicles, the battery pack can be used as a driving power supply to replace fossil fuel to provide driving power.

The battery pack specifically includes a Battery Management System (BMS) and a plurality of the battery modules. The battery modules can be electrically connected in series, parallel or a mixed mode of series and parallel, and are in communication connection with a battery management system to form the battery pack, and the battery management system controls and monitors the working state of each battery module.

Referring to fig. 1 and 2, a battery module 10 according to a preferred embodiment of the present utility model includes a base plate 100, a first cooling plate 200, battery cells 300, and a second cooling plate 400.

The base plate 100 is supported and may be formed of metal, and has high mechanical strength. In the battery pack, the bottom plate 100 can fix the entire battery module 10 to a structure such as a case and a bracket of a battery. To facilitate more reasonable use of space, the base plate 100 is generally rectangular.

The first cooling plate 200 is disposed on the bottom plate 100. The shape of the first cooling plate 200 is substantially the same as that of the bottom plate 100, and the first cooling plate 200 may be integrally formed with the bottom plate 100, or may be connected to the bottom plate 100 by welding, screwing, or the like. The first cooling plate 200 has a first flow passage (not shown) formed therein through which a cooling liquid can flow.

The battery cell 300 includes a plurality of battery cells 300 supported on the first cooling plate 200. The battery cell 300 may be a lithium ion battery, a sodium ion battery, or a magnesium ion battery, and its outer contour may be a cylinder, a flat body, a rectangular parallelepiped, or other shapes, but is not limited thereto. In particular, in the present embodiment, the battery cell 300 is a lithium ion cylindrical battery, and the outer contour thereof is cylindrical. The plurality of battery cells 300 are generally arranged in a matrix. For example, the plurality of battery cells 300 shown in fig. 1 are arranged in two rows, each row having ten battery cells 300.

Further, the bottom of each battery cell 300 is in contact with the first cooling plate 200. Therefore, when the cooling liquid flows through the first flow channel, heat can be taken away from the bottom of the battery cell 300.

In the present embodiment, an explosion-proof valve (not shown) is provided on each battery cell 300. When the gas pressure in the battery cell 300 exceeds the threshold value, the explosion-proof valve is opened to release the pressure inside the battery cell 300, thereby preventing the explosion of the battery cell 300.

The explosion-proof valve may be disposed at the top, bottom or side of the battery cell 300, and in this embodiment, the explosion-proof valve is disposed at the bottom of the battery cell 300. That is, the explosion-proof valve is disposed toward the first cooling plate 200. As such, when the explosion-proof valve is opened, the first cooling plate 200 may form an obstacle to the explosion-proof valve.

To avoid this problem, in the present embodiment, the first cooling plate 200 is spaced apart from the bottom plate 100 to form the buffer chamber 101 between the first cooling plate 200 and the bottom plate 100, and a plurality of avoidance holes 210 communicating with the buffer chamber 101 are respectively formed at positions of the first cooling plate 200 corresponding to the plurality of battery cells 300, and the explosion-proof valve of each battery cell 300 is located within the range of the corresponding avoidance hole 210.

The diameter of the pilot hole 210 is generally larger than the outer diameter of the explosion-proof valve, so the explosion-proof valve can be entirely within the range of the pilot hole 210. When the battery cell 300 is thermally out of control and causes the explosion-proof valve to open, high-temperature substances sprayed from the explosion-proof valve can enter the buffer chamber 101 through the escape hole 210, thereby preventing the first cooling plate 200 from blocking the explosion-proof valve.

Further, in the present embodiment, the plurality of battery cells 300 are arranged in a plurality of rows on the first cooling plate 200, and the plurality of avoidance holes 210 are correspondingly arranged in a plurality of rows. Further, a partition 500 is provided between the base plate 100 and the first cooling plate 200 to partition the buffer chamber 101 into a plurality of exhaust passages 102 arranged in parallel, and each row of the avoidance holes 210 communicates with one exhaust passage 102.

Specifically, the number of rows of the avoidance holes 210, the number of rows of the battery cells 300, and the number of the exhaust channels 102 are identical and are arranged in a one-to-one correspondence. When thermal runaway occurs in an array of cells 300, high temperature materials ejected from the explosion-proof valve will enter the corresponding vent channels 102. The plurality of exhaust passages 102 are isolated from each other by the partition 500, so that high-temperature substances can be prevented from entering one exhaust passage 102 into another exhaust passage 102. In this way, after thermal runaway occurs in a row of battery cells 300, the high-temperature substances entering the buffer cavity 101 can be prevented from flowing back from the other avoidance holes 210, so that damage is caused to other battery cells 300 without thermal runaway.

The second cooling plate 400 is disposed between the plurality of battery cells 300, and a side surface of each battery cell 300 is in contact with the second cooling plate 400, and a second flow passage (not shown) through which a cooling liquid flows is formed in the second cooling plate 400. Therefore, when the cooling liquid flows through the second flow passage, heat can be taken away from the side of the battery cell 300. As can be seen, the surface area of each battery cell 300 for heat dissipation is increased by the cooperation of the first cooling plate 200 and the second cooling plate 400, so that the cooling efficiency of the battery module 10 is significantly improved.

In the present embodiment, the plurality of battery cells 300 are arranged in a plurality of rows on the first cooling plate 200, and the second cooling plate 400 sequentially passes between two adjacent rows of battery cells 300.

The second cooling plate 400 may have a U-shape or an S-shape, and sequentially passes through the gaps between the adjacent two rows of the battery cells 300. And the battery cells 300 at both sides of the second cooling plate 400 are abutted against the surface of the second cooling plate 400 such that the side of each battery cell 300 is brought into contact with the second cooling plate 400. The second cooling plate 400 adopting the above-mentioned installation mode has a simple structure, is convenient to install, occupies a small space, and can make the structure of the battery module 10 more compact.

It should be noted that in other embodiments, the second cooling plate 400 may also be used in other ways. For example, the second cooling plate 400 is provided in a flexible structure and sequentially winds each battery cell 300.

Specifically, in the present embodiment, the first cooling plate 200 has a mounting groove 220 formed on a surface thereof, and the second cooling plate 400 is disposed in the mounting groove 220. The mounting groove 220 may extend along a U-shaped or S-shaped path in a direction consistent with the extending direction of the second cooling plate 400. When the battery module 10 is assembled, the second cooling plate 400 is directly inserted into the mounting groove 220, so that the assembly is convenient.

In addition, since the battery cells 300 in the present embodiment are cylindrical, in order to further increase the heat dissipation area of the battery cells 300, arc grooves (not shown) are formed on two opposite surfaces of the second cooling plate 400 in the present embodiment, and the side walls of each battery cell 300 are partially received in the arc grooves.

The second cooling plate 400 may be bent a plurality of times in a wave shape to form arc-shaped grooves aligned in the extending direction at both sides. The arc-shaped groove enables a larger wrap angle between the second cooling plate 400 and the battery cell 300, thereby increasing the contact area of the side surface of the battery cell 300 with the second cooling plate 400.

Further, in the present embodiment, two adjacent rows of the battery cells 300 are staggered by a preset distance along the arrangement direction, and the preset distance is equal to the radius of the battery cells 300. It can be seen that the cells 300 in one column are opposite the area between two adjacent cells 300 in the other column. Therefore, the two rows of battery cells 300 can be closer together, thereby saving space and further making the structure of the battery module 10 more compact.

The battery module 10 can enable the cooling liquid to flow through the first flow channel and the second flow channel during the charge and discharge process. Since the bottom of each battery cell 300 is in contact with the first cooling plate 200, the cooling liquid can take heat away from the bottom of the battery cell 300 when flowing through the first flow channel; since the side surface of each battery cell 300 is in contact with the second cooling plate 400, the cooling fluid can remove heat from the side surface of the battery cell 300 when flowing through the second flow channel. In this way, the area of the surface of each battery cell 300 for heat dissipation increases, so that the cooling efficiency of the battery module 10 can be improved.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (8)

1. A battery module, comprising:

a bottom plate;

the first cooling plate is arranged on the bottom plate, and a first flow passage for cooling liquid to flow through is formed in the first cooling plate;

the battery cells are borne on the first cooling plate, and the bottom of each battery cell is contacted with the first cooling plate; a kind of electronic device with high-pressure air-conditioning system

The second cooling plates are arranged among the plurality of battery cells, the side surfaces of each battery cell are in contact with the second cooling plates, and a second flow passage for cooling liquid to flow through is formed in each second cooling plate;

each battery monomer is provided with an explosion-proof valve, the explosion-proof valve is arranged at the bottom of each battery monomer, the first cooling plates are arranged at intervals with the bottom plate, a buffer cavity is formed between the first cooling plates and the bottom plate, a plurality of avoidance holes communicated with the buffer cavity are respectively formed in the positions of the first cooling plates corresponding to the plurality of battery monomers, and each explosion-proof valve of each battery monomer is located in the range of the corresponding avoidance hole.

2. The battery module according to claim 1, wherein a plurality of the battery cells are arranged in a plurality of rows on the first cooling plate, a plurality of the avoidance holes are correspondingly arranged in a plurality of rows, and a partition plate is provided between the bottom plate and the first cooling plate to partition the buffer chamber into a plurality of exhaust passages arranged in parallel, each row of the avoidance holes being communicated with one of the exhaust passages.

3. The battery module of claim 1, wherein a plurality of the battery cells are arranged in a plurality of rows on the first cooling plate, and the second cooling plate sequentially passes between two adjacent rows of the battery cells.

4. The battery module according to claim 3, wherein the battery cells are cylindrical, arc grooves are formed in both opposite surfaces of the second cooling plate, and a sidewall of each of the battery cells is partially received in the arc groove.

5. The battery module according to claim 4, wherein adjacent two rows of the battery cells are staggered by a preset distance in the arrangement direction, the preset distance being equal to the radius of the battery cells.

6. The battery module according to claim 3, wherein the first cooling plate has a mounting groove formed on a surface thereof, and the second cooling plate is disposed in the mounting groove.

7. A battery pack comprising a plurality of battery modules according to any one of claims 1 to 6.

8. An electrical device comprising a battery module according to any one of claims 1 to 6 or a battery pack according to claim 7.