CN219163591U - Battery box and battery pack - Google Patents

Abstract

The utility model discloses a battery box and a battery pack. The battery box includes a first side frame, a second side frame, a bottom plate and a beam cold plate. The first side frame includes a first cooling part, and the inner side is provided with a first liquid inlet port and a second liquid inlet port communicating with the first cooling part; the second side frame includes a second cooling part, and the inner side of the second side frame is provided with The first liquid outlet port and the second liquid outlet port communicated with the second cooling part; the bottom plate is arranged between the first side frame and the second side frame, including the third cooling part, and the first flow channel is arranged in the third cooling part , one end of the first flow channel communicates with the first liquid inlet port, and the other end communicates with the first liquid outlet port; the beam cold plate is arranged on the bottom plate, and the beam cold plate is provided with a second flow channel, and one end of the second flow channel is connected with the The second liquid inlet port is connected, and the other end is connected with the second liquid outlet port. The above-mentioned battery case integrates the cooling system into the battery case, which not only improves the integration efficiency, but also improves the heat dissipation efficiency, the structure is simple, and the assembly difficulty is low.

Description

Battery case and battery pack

technical field

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

Background technique

In order to meet the growing demand for high-power discharge and fast charging, the energy density of the battery continues to increase, and the heat generated by the battery during use is also increasing. Therefore, it is necessary to install a thermal management system in the battery to cool the battery. .

Most of the existing battery thermal management systems are cooled by installing a cold plate on the bottom or side of the battery cell. The effective heat exchange area is small, and the cooling effect is not ideal. The heat generated by the core is carried away. And the cold plate is mostly a stamped cold plate or harmonica pipe connected to the cabinet by welding or self-tapping nails, and connected to the outside world through water pipes and joints. The integration efficiency is not high, the assembly is more complicated, and the cost is higher. It is not suitable for the battery pack space. lesser cases.

Therefore, there is an urgent need to provide a battery box and a battery pack to solve the above problems.

Utility model content

According to one aspect of the present invention, the present invention provides a battery box, which integrates the cooling system into the battery box, improves the integration efficiency, improves the heat dissipation efficiency, and has a simple structure and low assembly difficulty.

For this purpose, the utility model adopts the following technical solutions:

Battery box, including:

The first side frame includes a first cooling part with a closed chamber, and the inner side of the first side frame is provided with a first liquid inlet port and a second liquid inlet port, and the first liquid inlet port and the second liquid inlet port The liquid inlet ports are all in communication with the first cooling part;

The second side frame includes a second cooling part with a closed chamber, the inner side of the second side frame is provided with a first liquid outlet interface and a second liquid outlet interface, the first liquid outlet interface and the second liquid outlet interface The liquid outlet ports are all in communication with the second cooling part;

The bottom plate is arranged between the first side frame and the second side frame, the bottom plate includes a third cooling part, a first flow channel is arranged in the third cooling part, and one end of the first flow channel is connected to the The first liquid inlet port is in communication, and the other end is in communication with the first liquid outlet port;

The beam cold plate is arranged on the bottom plate and is located between the first side frame and the second side frame. A second flow channel is arranged in the beam cold plate, and one end of the second flow channel It communicates with the second liquid inlet port, and the other end communicates with the second liquid outlet port.

Optionally, the first side frame also includes:

The first main body part, the first main body part is provided with a first installation cavity, and the first cooling part is arranged in the first installation cavity.

Optionally, a plurality of first reinforcing ribs are provided in the first installation cavity, and the plurality of first reinforcement ribs divide the first installation cavity into a plurality of first mold cavities.

Optionally, the first cooling part is a header.

Optionally, a liquid inlet is provided on the first body part, and the liquid inlet communicates with the first cooling part.

Optionally, the structure of the second side frame is the same as that of the first side frame.

Optionally, the bottom plate also includes:

The second main body part, the second main body part is provided with a second installation cavity, and the third cooling part is arranged in the second installation cavity.

Optionally, a plurality of second reinforcing ribs are arranged in the second installation cavity, and the plurality of second reinforcement ribs divide the second installation cavity into a plurality of second mold cavities.

Optionally, there are multiple beam cold plates, and the multiple beam cold plates are arranged in parallel at intervals.

According to another aspect of the utility model, the utility model provides a battery pack, comprising the battery case described in any one of the above technical solutions.

The beneficial effects of the utility model:

The utility model provides a battery box body, which comprises a first side frame, a second side frame, a bottom plate and a beam cold plate. Through the series connection of the first side frame and the second side frame to the bottom plate, the frame of the battery box has a liquid cooling function, realizing the whole package without cooling pipelines, which greatly improves the integration efficiency and space utilization, and because there is no cooling pipeline , greatly improving assembly efficiency and reducing production costs.

By setting the first side frame, the second side frame, the bottom plate and the beam cold plate, the four sides or even five sides of the battery cell can be cooled, and the heat dissipation efficiency is high, which can meet the heat dissipation requirements of the high-rate charge and discharge of the battery cell.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only the illustrations of the present invention. For some embodiments, those of ordinary skill in the art can also obtain other drawings according to the content of the embodiments of the present invention and these drawings without any creative effort.

Fig. 1 is a schematic structural view of a battery case provided by an embodiment of the present invention;

Fig. 2 is a schematic structural view of the first side frame provided by the embodiment of the present invention;

Fig. 3 is a schematic structural view of the bottom plate provided by the embodiment of the present invention;

Fig. 4 is a schematic structural view of the beam cold plate provided by the embodiment of the present invention.

In the picture:

100. First side frame; 110. First cooling part; 120. First liquid inlet port; 130. Second liquid inlet port; 140. First main body; 141. First installation cavity; 142. First reinforcement rib 150, the liquid inlet; 160, the first connection part; 200, the second side frame; 210, the liquid outlet; 220, the second connection part; 300, the bottom plate; 310, the third cooling part; 320, the second main body 321, the second installation cavity; 322, the second reinforcing rib; 400, the beam cold plate; 410, the second runner; 500, the third side frame; 600, the fourth side frame.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail. It can be understood that the specific embodiments described here are only used to explain the utility model, rather than limit the utility model. In addition, it should be noted that, for the convenience of description, only some structures related to the present utility model are shown in the drawings but not all structures.

In the description of the present utility model, unless otherwise clearly stipulated and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or a Integral; it can be mechanically or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, and may also include the first and second features being in direct contact with each other. The features are not in direct contact but through another feature between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this embodiment, the terms "up", "down", "left", "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operations. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in description, and have no special meaning.

This embodiment provides a battery box, which integrates a cooling system into the battery box, improves integration efficiency, improves heat dissipation efficiency, and has a simple structure and low assembly difficulty.

Specifically, as shown in FIGS. 1-4 , the battery box includes a first side frame 100 , a second side frame 200 , a bottom plate 300 and a beam cold plate 400 . Wherein, the first side frame 100 , the second side frame 200 , and the bottom plate 300 are jointly defined to form an accommodating groove for accommodating batteries. The first side frame 100 includes a first cooling portion 110 with a closed chamber, the inner side of the first side frame 100 is provided with a first liquid inlet port 120 and a second liquid inlet port 130, the first liquid inlet port 120 and the second liquid inlet port The liquid ports 130 are all in communication with the first cooling part 110; the second side frame 200 includes a second cooling part with a closed cavity, and the inner side of the second side frame 200 is provided with a first liquid outlet port and a second liquid outlet port, and the second side frame 200 is provided with a first liquid outlet port and a second liquid outlet port. Both the first liquid outlet port and the second liquid outlet port communicate with the second cooling part; the bottom plate 300 is arranged between the first side frame 100 and the second side frame 200, the bottom plate 300 includes a third cooling part 310, and the third cooling part 310 A first flow channel is provided inside, one end of the first flow channel communicates with the first liquid inlet port 120, and the other end communicates with the first liquid outlet port, that is, the cooling liquid enters the first flow channel of the bottom plate 300 from the first cooling part 110, and the first flow channel The cooling liquid in the channel flows into the second cooling part. During the flow of the cooling liquid, it can dissipate heat on the two sides and the bottom surface of the battery cell. The heat dissipation area of the battery cell is greatly increased, and the heat dissipation efficiency is improved. More preferably, the crossbeam cold plate 400 is arranged on the bottom plate 300 and is located between the first side frame 100 and the second side frame 200, and the crossbeam cold plate 400 is provided with a second flow channel 410, and the second flow channel 410 One end communicates with the second liquid inlet port 130, and the other end communicates with the second liquid outlet port. The crossbeam cold plate 400 is generally located between adjacent battery cells to dissipate heat from the sides of the battery cells, further increasing the heat dissipation area of the battery cells, and taking away the heat generated by the battery cells in time when the cells are charged at a high rate, reducing the The risk of thermal runaway of the battery cell is reduced. Moreover, the battery box integrates the cooling system inside the box. Compared with the traditional solution of setting a liquid cold plate, there is no need to set up a cooling pipeline, which improves the integration efficiency and space utilization. The structure is simple, easy to assemble, and the cost is low. .

Further, referring to FIG. 2 , the first side frame 100 further includes a first main body portion 140 , and a first installation cavity 141 is disposed in the first main body portion 140 , and the first cooling portion 110 is disposed in the first installation cavity 141 . By providing the first main body part 140, on the one hand, the mechanical strength of the first side frame 100 is improved, the risk of deformation of the first side frame 100 is reduced, and the reliability of the first side frame 100 is improved; on the other hand, The first cooling unit 110 can be protected to prevent the first cooling unit 110 from being squeezed and collided, and the reliability of the first cooling unit 110 is improved.

Preferably, a plurality of first reinforcing ribs 142 are provided in the first installation cavity 141, and the plurality of first reinforcement ribs 142 divide the first installation cavity 141 into a plurality of first mold cavities. The mechanical strength of the first main body part 140 is further improved by providing the first reinforcing rib 142 . Optionally, in this embodiment, the first cooling part 110 is a collector, the collector is filled with cooling liquid, and the collector is in the shape of a long plate to increase the heat dissipation area of the battery cells. In other embodiments, the first cooling unit 110 can also be set to other types, such as a liquid cooling plate, etc., which can be set according to actual needs.

Further, a liquid inlet 150 is provided on the outside of the first main body 140, and the liquid inlet 150 communicates with the first cooling part 110, and the cooling liquid enters the first cooling part 110 through the liquid inlet 150. The two side frames 200 are provided with liquid outlets 210, which communicate with the second cooling unit. The cooling liquid flows through the bottom plate 300 and the beam cold plate 400 and then flows out from the liquid outlets 210, forming a circulation of the cooling liquid.

Further, continue referring to FIG. 1 , the first side frame 100 is provided with a first connection portion 160 , and the second side frame 200 is provided with a second connection portion 220 , the first connection portion 160 and the second connection portion 220 are used to communicate with other components in the battery system.

Optionally, the above battery box further includes a third side frame 500 and a fourth side frame 600, the first side frame 100, the second side frame 200, the third side frame 500 and the fourth side frame 600 are jointly arranged on the bottom plate 300 around, forming accommodating grooves for installing electric cores. The first side frame 100 , the second side frame 200 , the third side frame 500 and the fourth side frame 600 can be sealed and connected by welding, the welding process is simple, and the installation efficiency is high.

Preferably, in this embodiment, the structure of the second side frame 200 is the same as that of the first side frame 100 , which is convenient for production and helps to reduce research and development costs.

Further, referring to FIG. 3 , the bottom plate 300 further includes a second main body portion 320 , a second installation cavity 321 is disposed in the second main body portion 320 , and the third cooling portion 310 is disposed in the second installation cavity 321 . By providing the second main body part 320, on the one hand, the mechanical strength of the bottom plate 300 is improved, the risk of deformation of the bottom plate 300 is reduced, and the reliability of the operation of the bottom plate 300 is improved; on the other hand, the third cooling part 310 can be protected , to prevent the third cooling part 310 from being squeezed and collided, and to improve the reliability of the third cooling part 310 in operation.

Preferably, the second installation cavity 321 is provided with a plurality of second reinforcement ribs 322, and the second reinforcement ribs 322 divide the second installation cavity 321 into a plurality of second mold cavities. The mechanical strength of the second main body part 320 is further improved by disposing the second reinforcing rib 322 . Optionally, in this embodiment, the third cooling unit 310 is a liquid cooling plate. There are multiple first flow channels in the third cooling part 310, and the multiple first flow channels are arranged in parallel at intervals. The flow of this straight-line flow channel is relatively short, which can effectively reduce the flow resistance of the cooling liquid and the internal temperature of each first flow channel. The temperature difference between the coolants, the heat dissipation efficiency is higher.

Further, referring to FIG. 1 and FIG. 4 , there are multiple beam cold plates 400 , and the multiple beam cold plates 400 are arranged in parallel at intervals. By arranging a plurality of crossbeam cold plates 400, the holding tank is divided into a plurality of sub-slots, and a cell can be placed in each sub-slot. The cross-beam cold plate 400 can not only improve the mechanical strength of the above-mentioned battery box, but also maintain The heat dissipation is carried out on the side of the battery box, which improves the heat dissipation efficiency of the above-mentioned battery box. Optionally, in this embodiment, the beam cold plate 400 is a liquid cold plate, and there are multiple second flow channels 410 in the liquid cold plate, and the plurality of second flow channels 410 are arranged in parallel at intervals. The flow path of the type flow channel is relatively short, which can effectively reduce the flow resistance of the cooling liquid and the temperature difference between the cooling liquids in each second flow channel 410 , and the heat dissipation efficiency is high.

This embodiment also provides a battery pack, including the above-mentioned battery case, the battery pack has a relatively compact structure, good heat dissipation effect, simple structure, and is easy to assemble.

Apparently, the above-mentioned embodiments of the present utility model are only examples for clearly illustrating the present utility model, rather than limiting the implementation manner of the present utility model. Various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the utility model shall be included in the protection scope of the claims of the utility model.

Claims (10)

1. The battery box is characterized in that it comprises: The first side frame (100) includes a first cooling part (110) with a closed chamber, and the inner side of the first side frame (100) is provided with a first liquid inlet port (120) and a second liquid inlet port ( 130), the first liquid inlet port (120) and the second liquid inlet port (130) are both in communication with the first cooling part (110); The second side frame (200) includes a second cooling portion with a closed chamber, the inner side of the second side frame (200) is provided with a first liquid outlet interface and a second liquid outlet interface, and the first liquid outlet Both the interface and the second liquid outlet interface communicate with the second cooling part; A bottom plate (300), arranged between the first side frame (100) and the second side frame (200), the bottom plate (300) includes a third cooling part (310), and the third cooling part (310) is provided with a first flow channel, one end of the first flow channel communicates with the first liquid inlet port (120), and the other end communicates with the first liquid outlet port; A beam cold plate (400), arranged on the bottom plate (300), and located between the first side frame (100) and the second side frame (200), inside the beam cold plate (400) A second flow channel (410) is provided, one end of the second flow channel (410) communicates with the second liquid inlet port (130), and the other end communicates with the second liquid outlet port. 2. The battery box according to claim 1, characterized in that, the first side frame (100) further comprises: The first main body part (140), the first main body part (140) is provided with a first installation cavity (141), and the first cooling part (110) is arranged in the first installation cavity (141). 3. The battery box according to claim 2, characterized in that, a plurality of first reinforcing ribs (142) are arranged in the first installation cavity (141), and the plurality of first reinforcing ribs (142) connect the The first installation cavity (141) is divided into a plurality of first mold cavities. 4. The battery case according to claim 2, characterized in that the first cooling part (110) is a collector. 5. The battery case according to claim 2, characterized in that, the first main body (140) is provided with a liquid inlet (150), and the liquid inlet (150) is connected with the first cooling The part (110) is connected. 6. The battery box according to claim 2, characterized in that, the second side frame (200) has the same structure as the first side frame (100). 7. The battery box according to claim 1, characterized in that, the bottom plate (300) further comprises: The second main body part (320), the second main body part (320) is provided with a second installation cavity (321), and the third cooling part (310) is arranged in the second installation cavity (321). 8. The battery box according to claim 7, characterized in that, a plurality of second reinforcing ribs (322) are arranged in the second installation cavity (321), and the plurality of second reinforcing ribs (322) connect the The second installation cavity (321) is divided into a plurality of second mold cavities. 9. The battery box according to any one of claims 1-8, characterized in that there are multiple beam cold plates (400), and multiple beam cold plates (400) are arranged in parallel at intervals. 10. The battery pack, comprising the battery box according to any one of claims 1-9.

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