CN210136906U - Temperature control assembly and battery pack - Google Patents

Abstract

The utility model provides a temperature control assembly and a battery pack. The temperature control assembly includes a first side plate, a second side plate and a first buffer plate. The first buffer plate is arranged between the second side plate and the first side plate to divide the cavity into a plurality of channels, and at least part of the first buffer plate extends obliquely from the first side plate toward the second side plate . When the external air flows through the channel of the temperature control assembly, the heat dissipation treatment of the battery can be realized. During the use of the battery pack, the expansion force of two adjacent batteries squeezes the first side plate and the second side plate respectively. Since at least part of the first buffer plate extends obliquely, the expansion transmitted to the first buffer plate The force is greatly reduced, thereby extending the service life of the temperature control components. In addition, since the at least part of the first buffer plate extending obliquely is more likely to be bent and deformed under the action of the expansion force, the temperature control assembly can absorb the expansion force of the battery in time, thereby improving the service life of the battery.

Description

Temperature control components and battery packs

technical field

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

Background technique

A battery pack typically includes multiple batteries grouped together. In the group technology, in addition to ensuring the strength and performance of the structure itself, it is also necessary to consider the impact of the structure on the battery life. The temperature and expansion force have a great impact on the battery life, so thermal management and expansion force design must be considered in the design.

In terms of thermal management design: At present, there are mainly two ways of water cooling and air cooling. Among them, due to the high cost of the water cooling method, the battery pack generally adopts the air cooling method for heat dissipation.

In terms of expansion force design: during the charging and discharging process of the battery pack, the battery will gradually expand and interact with the fixed structure (ie, expansion force). Among them, the appropriate expansion force will be beneficial to the battery's own reaction, but the excessive expansion force will cause the battery to be overstressed and cause lithium precipitation, and even cause irreversible capacity loss, which greatly reduces the life of the battery.

In order to alleviate the expansion force, there are mainly the following forms: (1) The batteries are directly attached to each other and the external structure is strengthened to directly resist the expansion force. When the number of batteries increases gradually, the expansion force of the batteries will become larger and larger, thus reducing the service life of the batteries; (2) Structures such as buffer pads are added between the batteries, which absorb the expansion force through the elastic properties of the material itself, thereby reducing the cost of the battery. The disadvantage of this method is: the large surface of the battery is close to the buffer pad, and only the side and bottom of the battery can be used for heat dissipation, which reduces the heat dissipation efficiency; (3) The battery is separated from the battery, and the middle is empty. The disadvantage of this method is that the battery is free to expand at the beginning, and it is easy to react insufficiently under no pressure, which reduces the service life. If it is too large, it will affect the group volume.

Utility model content

In view of the problems existing in the background technology, the purpose of the present invention is to provide a temperature control assembly and a battery pack. When the temperature control assembly is applied to the battery pack, the temperature control assembly can not only thermally manage the battery, but also absorb the battery. The generated expansion force reduces the deformation of the battery under the action of the expansion force, and greatly improves the service life of the battery.

In order to achieve the above purpose, the present invention provides a temperature control assembly, which includes: a first side plate; a second side plate, which is arranged opposite to the first side plate in the longitudinal direction, and the second side plate is connected to the first side plate A cavity is formed together with the first side plate; and a first buffer plate is arranged between the second side plate and the first side plate and is connected to the second side plate and the first side plate, so as to connect the cavity It is divided into a plurality of channels, and at least part of the first buffer plate extends obliquely from the first side plate toward the second side plate.

The acute angle θ ₁ formed by the extending direction of the first buffer plate and the first side plate is not greater than 45°.

The first buffer plate is formed in a wave-like structure.

The entire first buffer plate is formed to extend obliquely from the first side plate toward the second side plate.

The first buffer plate is formed in a plate-like structure or an arc-like structure.

The first buffer plate as a whole is formed by extending obliquely upward from the first side plate toward the second side plate. The temperature control assembly further includes: a second buffer plate, which is arranged between the second side plate and the first side plate and is connected to the second side plate and the first side plate, and the second buffer plate faces from the first side plate to the second side plate. The side panels are inclined and extend downward.

The second buffer plate is spaced apart from the first buffer plate in the up-down direction.

The second buffer plate is directly connected to the first buffer plate.

The second buffer plate and the first buffer plate are formed into an arched structure. Alternatively, the corresponding portions of the second buffer plate, the first buffer plate and the first side plate are formed in a triangular structure. Alternatively, the corresponding portions of the second buffer plate, the first buffer plate and the second side plate are formed into a triangular structure.

The present invention also provides a battery pack, which includes a plurality of batteries and the above-mentioned temperature control assembly, wherein the plurality of batteries includes a first battery and a second battery, and the temperature control assembly is arranged on the first battery and the second battery. between batteries.

The plurality of batteries are arranged in at least two rows of battery rows in the lateral direction, and a temperature control assembly is provided between two adjacent batteries in each battery row. The battery pack further includes: a lower box body, supporting the at least two rows of battery rows; an air duct assembly, arranged between the two rows of battery rows and fixed to the lower box body, and the air duct assembly and the corresponding battery row form an air duct , the air duct is communicated with a plurality of channels of the corresponding temperature control assembly; and a fan is communicated with the air duct.

The air duct assembly includes: an air volume adjustment plate, which is arranged in the air duct and expands the air duct in the longitudinal direction from a side close to the fan to a side away from the fan.

The beneficial effects of the present utility model are as follows:

In the battery pack of the present invention, when the external air flows through the channel of the temperature control component, the heat dissipation treatment of the battery can be realized. And during the use of the battery pack, the battery will generate expansion force. At this time, the expansion force of two adjacent batteries squeezes the first side plate and the second side plate respectively, and the first side plate and the second side plate will expand. The force is transmitted to the first buffer plate. Since at least part of the first buffer plate extends obliquely from the first side plate toward the second side plate, the expansion force transmitted to the first buffer plate via the first side plate and the second side plate is greatly reduced, thereby extending the length of the The service life of the temperature control components. In addition, because the at least part of the first buffer plate extending obliquely is more likely to bend and deform under the action of the expansion force, the temperature control assembly can absorb the expansion force of the battery in time, thereby greatly improving the service life of the battery.

Description of drawings

FIG. 1 is an exploded view of a battery pack of the present invention in an embodiment.

FIG. 2 is a perspective view of the battery pack of the present invention in another embodiment.

FIG. 3 is a perspective view of the temperature control assembly in FIG. 2 .

FIG. 4 is an enlarged view of the circled portion in FIG. 3 .

FIG. 5 is a perspective view of the temperature control assembly in FIG. 1 .

FIG. 6 is a modification of FIG. 5 .

FIG. 7 is another modification of FIG. 5 .

FIG. 8 is a front view of FIG. 5 .

Among them, the reference numerals are described as follows:

1 Temperature control assembly 43 Second support plate

11 First side plate 44 Mounting plate

12 Second side panel 45 Weather strip

13 The first buffer plate 5 Fan

14 Second bumper plate 6 Cable ties

15 The first connecting plate 7 Upper box cover

16 Second connection plate 8 End plate

2 battery 9 mounting panel

2A First battery 10 Harness isolation plate

2B Second battery S battery row

3 lower cabinet F channel

4 Air duct assembly X horizontal

41 Air volume adjustment plate Y Longitudinal

42 The first support plate Z vertical direction

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

In the description of this application, unless otherwise expressly specified and limited, the terms "first" and "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "a plurality" is a Refers to two or more (including two); unless otherwise specified or stated, the term "connection" should be understood in a broad sense, for example, "connection" may be a fixed connection, a detachable connection, or an integral connection, or Electrical connection, or signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In the description of this specification, it should be understood that the terms “upper”, “lower”, etc. described in the embodiments of the present application are described from the angles shown in the drawings, and should not be construed as referring to the embodiments of the present application. limit. The present application will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

1 to 8 , the battery pack of the present application includes a temperature control assembly 1, a plurality of batteries 2, a lower case 3, an air duct assembly 4, a fan 5, a cable tie 6, an upper case cover 7, an end plate 8, an installation Panel 9 and harness isolation plate 10.

1 and 2 , the plurality of batteries 2 include a first battery 2A and a second battery 2B, and the temperature control assembly 1 is disposed between the first battery 2A and the second battery 2B. Further, the number of the first battery 2A and the second battery 2B may be multiple, and the multiple first battery 2A and the multiple second battery 2B may be alternately arranged in the longitudinal direction Y, and each adjacent first battery 2A The temperature control assembly 1 can be arranged between the battery and the second battery 2B.

In order to ensure the strength and thermal conductivity of the temperature control assembly 1, the temperature control assembly 1 can be made of metal materials, such as aluminum profiles.

3 to 8 , the temperature control assembly 1 may include a first side plate 11 , a second side plate 12 , a first buffer plate 13 , a first connection plate 15 and a second connection plate 16 . The first side plate 11 , the second side plate 12 , the first buffer plate 13 , the first connecting plate 15 and the second connecting plate 16 can be integrally formed by an aluminum extrusion process.

The first side plate 11 is disposed opposite to the second side plate 12 along the longitudinal direction Y, and the second side plate 12 is connected to the first side plate 11 through the first connecting plate 15 and the second connecting plate 16 . The first side plate 11 and the second side plate 12 are disposed directly facing the large surface of the corresponding battery 2 . When the external air flows through the temperature control assembly 1 , the heat dissipation treatment of the battery 2 can be realized.

The first connecting plate 15 connects one end of the first side plate 11 and one end of the second side plate 12, and the second connecting plate 16 connects the other end of the first side plate 11 and the other end of the second side plate 12, whereby the first The side plate 11 , the second side plate 12 , the first connecting plate 15 and the second connecting plate 16 together form a surrounding frame structure with a cavity.

The first buffer plate 13 is disposed between the second side plate 12 and the first side plate 11 and connected to the second side plate 12 and the first side plate 11 to divide the cavity into a plurality of channels F, and the first buffer plate 13 is At least part of a buffer plate 13 extends obliquely from the first side plate 1 toward the second side plate 12 . Wherein, the number of the first buffer plates 13 may be plural, and the plurality of first buffer plates 13 are arranged at intervals along the vertical direction Z, so as to divide the cavity into a plurality of channels F. As shown in FIG.

During the use of the battery pack, the battery 2 will generate expansion force. At this time, the expansion force of the two adjacent batteries 2 (ie, the first battery 2A and the second battery 2B) squeeze the first side plate 11 and the second side respectively. The plate 12 , and the first side plate 11 and the second side plate 12 transmit the expansion force to the first buffer plate 13 . Since at least part of the first buffer plate 13 extends obliquely from the first side plate 1 toward the second side plate 12 , the expansion force transmitted to the first buffer plate 13 via the first side plate 11 and the second side plate 12 is greatly reduced. small, thereby prolonging the service life of the temperature control assembly 1 . In addition, because the at least part of the first buffer plate 13 that extends obliquely is more likely to bend and deform under the action of the expansion force, so that the temperature control assembly 1 can absorb the expansion force of the battery 2 in time, thereby greatly improving the battery 2 . service life.

Due to the size of the included angle formed by the extension direction of the first buffer plate 13 (ie, the extension direction of the at least part of the first buffer plate 13 ) and the first side plate 11 and the angle formed by the second side plate 12 , it is determined that In order to reduce the expansion force transmitted to the first buffer plate 13 via the first side plate 11 and the second side plate 12 , if the expansion force received by the first buffer plate 13 is too large, the first buffer plate 13 will be crushed. Therefore, in order to prevent the first buffer plate 13 from being crushed by excessive expansion force, preferably, referring to FIG. 8 , the acute angle _θ1 formed by the extending direction of the first buffer plate 13 and the first side plate 11 is not greater than 45° (the first The acute angle formed by a buffer plate 13 and the second side plate 12 is equal to the acute angle formed by the first buffer plate 13 and the first side plate 11).

Several specific structures of the temperature control assembly 1 will be described in detail below based on the arrangement of the first buffer plate 13 .

In the first embodiment (not shown), only the first buffer plate 13 is provided between the first side plate 1 and the second side plate 12 of the temperature control assembly 1, and the first buffer plate 13 is integrally formed from the first side plate. 11 extends obliquely toward the second side plate 12 . Specifically, the entirety of the first buffer plate 13 may extend in an upwardly inclined direction from the first side plate 11 toward the second side plate 12; The side plate 12 is formed by extending in an inclined downward direction.

In the first embodiment, the first buffer plate 13 may be formed in a plate-shaped structure or an arc-shaped structure. The first buffer plate 13 may be formed as a structure with uniform thickness; alternatively, the first buffer plate 13 may be formed as a structure with a thick middle and thin at both ends; alternatively, the first buffer plate 13 may be formed as a structure with a thin middle and thick ends.

In the second embodiment, referring to FIGS. 3 and 4 , only the first buffer plate 13 is disposed between the first side plate 1 and the second side plate 12 of the temperature control assembly 1 , and the first buffer plate 13 can be formed at this time. It is a wavy structure (also known as a corrugated board structure). In other words, the first buffer plates 13 alternately extend in a direction inclined upward from the first side plate 11 toward the second side plate 12 and a direction inclined downward from the first side plate 11 toward the second side plate 12 .

The first buffer plate 13 of this structure is formed with protrusions, and each protrusion is formed into an arc-shaped structure. Based on the shape and structure of each protrusion, the first buffer plate 13 has sufficient space for bending and deformation, so that the temperature control assembly 1 can absorb the expansion force of the battery 2 in time, which greatly improves the service life of the battery 2 .

In the third embodiment, referring to FIG. 5 to FIG. 7 , the first buffer plate 13 as a whole is formed to extend obliquely upward from the first side plate 11 toward the second side plate 12 , and the temperature control assembly 1 further includes a second buffer plate 14 . The second buffer plate 14 is disposed between the second side plate 12 and the first side plate 11 and connected to the second side plate 12 and the first side plate 11 , and the second buffer plate 14 goes from the first side plate 11 to the second side plate 11 . The side plate 12 is formed by extending obliquely downward. The second buffer plate 14 is used to absorb the expansion force of the battery 2 together with the first buffer plate 13 , thereby greatly improving the service life of the battery 2 .

The number of the second buffer plates 14 may be plural, and the plurality of second buffer plates 14 are arranged at intervals along the vertical direction Z to divide the cavity into a plurality of channels F together with the first buffer plates 13 .

Due to the size of the included angle formed between the extension direction of the second buffer plate 14 and the first side plate 11 and the size of the included angle formed with the second side plate 12 , the transmission to the first side plate 11 and the second side plate 12 is determined. The expansion force of the two buffer plates 14 is large. If the expansion force received by the second buffer plate 14 is too large, the second buffer plate 14 will be crushed. Therefore, in order to prevent the second buffer plate 14 from being crushed by excessive expansion force, preferably, referring to FIG. 8 , the acute angle θ ₂ formed by the extending direction of the second buffer plate 14 and the first side plate 11 is not greater than 45° (No. The acute angle formed by the two buffer plates 14 and the second side plate 12 is equal to the acute angle formed by the second buffer plate 14 and the first side plate 11).

Referring to FIG. 5 , the second buffer plate 14 is spaced apart from the first buffer plate 13 along the up-down direction Z and the first buffer plate 13 and the second buffer plate 14 are staggered. At this time, the first buffer plate 13 and the second buffer plate 14 are formed For the "eight" shaped structure. This "eight"-shaped structure ensures the structural stability of the temperature control assembly 1 and improves the structural strength of the temperature control assembly 1 .

6, the second buffer plate 14 is directly connected to the first buffer plate 13, and the first buffer plate 13 and the second buffer plate 14 and the corresponding parts of the first side plate 1 form a triangular structure, the first buffer plate 13 and Corresponding parts of the second buffer plate 14 and the second side plate 12 also form a triangular structure. This triangular structure ensures the structural stability of the temperature control assembly 1 and improves the structural strength of the temperature control assembly 1 .

Referring to FIG. 7 , the second buffer plate 14 is directly connected to the first buffer plate 13 , and the first buffer plate 13 and the second buffer plate 14 are formed into an arched structure. This arched structure ensures the structural stability of the temperature control assembly 1 and improves the structural strength of the temperature control assembly 1 .

In the third embodiment, the first buffer plate 13 and the second buffer plate 14 may be formed in a structure with a uniform thickness (as shown in FIGS. 6 and 7 ). Alternatively, the first buffer plate 13 and the second buffer plate 14 may be formed to be thick in the middle and thin at both ends. Alternatively, the first buffer plate 13 and the second buffer plate 14 may be formed in a thin structure in the middle and thick at both ends (as shown in FIG. 5 and FIG. 8 ). The first buffer plate 13 and the second buffer plate 14 may be formed in a plate-like structure (as shown in FIG. 6 ) or an arc-shaped structure (as shown in FIG. 7 ).

Referring to FIGS. 1 and 2 , the lower case 3 is used to support the plurality of batteries 2 . The plurality of batteries 2 can be arranged in at least two rows of battery rows S in the lateral direction X, and the air duct assembly 4 is arranged between the two rows of battery rows S and fixed to the lower case 3 . The temperature control assembly 1 has a plurality of channels F, the air channel assembly 4 and the corresponding battery row S are formed with air channels, and the air channels are communicated with the plurality of channels F of the corresponding temperature control assembly 1 and the fan 5 . Specifically, the air duct assembly 4 may include an air volume adjustment plate 41 , a first support plate 42 , a second support plate 43 , a mounting plate 44 and a sealing strip 45 .

The air volume adjustment plate 41 is disposed in the air duct, the first support plate 42 and the second support plate 43 are spaced apart in the longitudinal direction Y, and the first support plate 42 is close to the fan 5 . The height of the air volume adjusting plate 41 decreases sequentially along the direction of the first support plate 42 toward the second support plate 43, so that the air duct expands from the side close to the fan 5 to the side away from the fan 5 along the longitudinal direction Y.

The mounting plate 44 extends along the longitudinal direction Y and is connected to the first supporting plate 42 and the second supporting plate 43 , and the air volume adjusting plate 41 is fixedly mounted on the mounting plate 44 . The sealing strip 45 is disposed on the first support plate 42 , the second support plate 43 and the mounting plate 44 . After the air duct assembly 4 is assembled with the plurality of batteries 2, the sealing strip 45 is adhered to the corresponding battery row S to be sealedly connected with the battery row S.

During the use of the battery pack, under the action of the fan 5, the outside air can enter the plurality of channels F of the temperature control assembly 1, so as to realize the heat dissipation of the battery 2. At the same time, based on the setting of the air volume adjusting plate 41 , the amount of outside air entering different temperature control components 1 is different, thereby achieving uniform heat dissipation to all batteries 2 .

1 and 2 , the end plates 8 are disposed at both ends of each battery row S in the longitudinal direction Y. The cable ties 6 are circumferentially fastened to all the batteries 2 in one battery row S, the corresponding temperature control assemblies 1 and the corresponding two end plates 8 . The installation panel 9 is located outside the corresponding end plate 8 in the longitudinal direction Y, is fixedly connected to the lower box 3 and the corresponding end plate 8 , and is fixedly installed with the fan 5 .

Referring to FIGS. 1 and 2 , the wire harness isolation plate 10 is disposed above the plurality of batteries 2 and is directly fixed to the end plate 8 , thereby helping to improve the grouping efficiency and the degree of integration of the battery pack. The upper box cover 7 is arranged above the wire harness isolation plate 10 and is fixedly connected to the wire harness isolation plate 10 through fasteners (eg, rivets). Here, since the peripheral side of the upper box cover 7 is not provided with a complex structure such as a buckle, it can be directly processed by a blister process, thereby reducing the processing cost.

Claims (12)

1. A temperature control assembly (1), characterized in that, comprising: a first side plate (11); The second side plate (12) is arranged opposite to the first side plate (11) along the longitudinal direction (Y), and the second side plate (12) is connected to the first side plate (11) and is connected to the first side plate (11) together form a cavity; and The first buffer plate (13) is arranged between the second side plate (12) and the first side plate (11) and is connected to the second side plate (12) and the first side plate (11), so as to connect the The cavity is divided into a plurality of channels (F), and at least part of the first buffer plate (13) extends obliquely from the first side plate (11) toward the second side plate (12). 2 . The temperature control assembly ( 1 ) according to claim 1 , wherein the acute angle θ ₁ formed by the extending direction of the first buffer plate ( 13 ) and the first side plate ( 11 ) is not greater than 45°. 3 . 3. The temperature control assembly (1) according to claim 1, characterized in that, the first buffer plate (13) is formed in a wave-like structure. 4 . The temperature control assembly ( 1 ) according to claim 1 , wherein the first buffer plate ( 13 ) is integrally formed by extending obliquely from the first side plate ( 11 ) toward the second side plate ( 12 ). 5 . 5 . The temperature control assembly ( 1 ) according to claim 4 , wherein the first buffer plate ( 13 ) is formed in a plate-shaped structure or an arc-shaped structure. 6 . 6. The temperature control assembly (1) according to claim 4, characterized in that, The first buffer plate (13) as a whole is formed by extending obliquely upward from the first side plate (11) toward the second side plate (12); The temperature control assembly (1) further comprises: a second buffer plate (14) disposed between the second side plate (12) and the first side plate (11) and connected to the second side plate (12) and the first side The plate (11), and the second buffer plate (14) is formed by extending obliquely downward from the first side plate (11) toward the second side plate (12). 7 . The temperature control assembly ( 1 ) according to claim 6 , wherein the second buffer plate ( 14 ) is spaced apart from the first buffer plate ( 13 ) along the up-down direction (Z). 8 . 8. The temperature control assembly (1) according to claim 6, wherein the second buffer plate (14) is directly connected to the first buffer plate (13). 9. The temperature control assembly (1) according to claim 8, characterized in that, The second buffer plate (14) and the first buffer plate (13) are formed into an arched structure; or The second buffer plate (14) is formed into a triangular structure with the corresponding parts of the first buffer plate (13) and the first side plate (11); or Corresponding parts of the second buffer plate (14), the first buffer plate (13) and the second side plate (12) are formed into a triangular structure. 10. A battery pack, characterized by comprising a plurality of batteries (2) and the temperature control assembly (1) according to any one of claims 1-9, the plurality of batteries (2) comprising a first battery (2A) and the second battery (2B), the temperature control assembly (1) is arranged between the first battery (2A) and the second battery (2B). 11. The battery pack according to claim 10, wherein, The plurality of batteries (2) are arranged in at least two rows of battery rows (S) in the lateral direction (X), and a temperature control assembly ( 1); The battery pack further comprises: a lower box body (3), supporting the at least two rows of battery rows (S); an air duct assembly (4), arranged between the two rows of battery rows (S) and fixed to the lower box body (3) ), and the air duct assembly (4) and the corresponding battery row (S) are formed with an air duct, and the air duct is communicated with the plurality of channels (F) of the corresponding temperature control assembly (1); and the fan (5), communicated with the air duct. 12 . The battery pack according to claim 11 , wherein the air duct assembly ( 4 ) comprises: an air volume adjusting plate ( 41 ), which is arranged in the air duct and causes the air duct to move away from close to the air duct along the longitudinal direction (Y). 13 . The side of the fan (5) is expanded to the side away from the fan (5).

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