CN217788557U

CN217788557U - Battery core partition plate, battery pack and vehicle

Info

Publication number: CN217788557U
Application number: CN202221580129.0U
Authority: CN
Inventors: 蔡晨; 温鸿; 公绪斌; 张中林; 周燕飞
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2022-06-22
Filing date: 2022-06-22
Publication date: 2022-11-11
Anticipated expiration: 2032-06-22

Abstract

The utility model discloses an electricity core baffle, battery package and vehicle, electricity core baffle includes: a thermal insulation member; and the heat conducting plate is internally provided with a cavity, and the heat insulation piece is arranged in the cavity. The heat insulating part can play the effect of isolated heat transfer, and the heat-conducting plate then can play the effect of heat conduction, the heat can transmit to the heat-conducting plate more, and the heat can not pass through the heat insulating part in the cavity, but through the heat-conducting plate transmission and the cooling, thereby play fine heat conduction effect when thermal-insulated, additionally, set up the heat insulating part in the cavity, so can make setting up of heat insulating part more firm, the heat insulating part can work more steadily, and the heat-conducting plate can form a whole with the heat insulating part, the installation setting of the electric core baffle of being convenient for like this.

Description

Battery core partition plate, battery pack and vehicle

Technical Field

The utility model belongs to the technical field of the vehicle technique and specifically relates to an electricity core baffle, battery package and vehicle is related to.

Background

Among the correlation technique, the electric core baffle of battery package generally is plastic sheet, aerogel or thermal-insulated rubber pad, because when electric core takes place thermal runaway, in order to prevent that the heat from to its adjacent electric core conduction, arousing further heat to stretch, the electric core baffle generally chooses for use the above-mentioned material that the heat conductivity is low to insulate against heat.

However, can reduce the radiating efficiency of electric core normal during operation like this, originally also can carry out heat-conduction between electric core and the electric core, carry out the heat with the electric core baffle of low heat conductivity and separate the back absolutely, the heat of electric core can only be given the cooling module who gives the battery package, and thermal transfer efficiency is lower.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an electricity core baffle, this electricity core baffle can play the effect of isolated heat transfer, and the heat-conducting plate then can play the effect of heat conduction to play fine heat conduction effect when thermal-insulated, in addition, heat-conducting plate and heat insulating part can form a whole, the setting of the electric core baffle of being convenient for like this, electric core baffle is simple and convenient more when the installation.

The utility model further provides a battery package.

The utility model discloses a vehicle is still further provided.

According to the utility model discloses an electricity core baffle, include: a thermal insulation member; and the heat conducting plate is internally provided with a cavity, and the heat insulation part is arranged in the cavity.

According to the utility model discloses an electricity core baffle, the heat insulating part can play the effect of isolated heat transfer, and the heat-conducting plate then can play the effect of heat conduction, the heat can transmit to the heat-conducting plate more, and the heat can not pass through the heat insulating part in the cavity, but pass through the heat-conducting plate transmission and cool off, thereby play fine heat conduction effect when thermal-insulated, in addition, set up the heat insulating part in the cavity, the setting that can make the heat insulating part like this is more firm, the heat insulating part can work more steadily, and the heat-conducting plate can form a whole with the heat insulating part, the installation setting of the electric core baffle of being convenient for like this.

In some examples of the invention, the heat-conducting plate comprises: the plate comprises two plate bodies which are oppositely arranged, the edges of the two plate bodies are fixedly connected, and the cavity is formed between the two plate bodies.

In some examples of the present invention, two of the plate bodies include: the heat insulation plate comprises a contact part, a bending part and a connecting part, wherein the bending part is connected between the contact part and the connecting part, the connecting part of the two plate bodies is fixedly connected, the contact part and the bending part define a cavity, and the heat insulation part is arranged in the cavity.

In some examples of the present invention, the edge of the plate body is further provided with a flange, and the flange faces away from one side of the plate body in an extending manner.

In some examples of the present invention, the flange is perpendicular to the plate body, and the extending direction of the flange away from the plate body is a first direction, the heat insulation member is in a dimension in the first direction is a, the plate body is in a dimension in the first direction is b, and a and b satisfy the following relation: a is more than or equal to 1mm and less than or equal to 3mm, and b is more than or equal to 0.1mm and less than or equal to 0.5mm.

In some examples of the present invention, the plate body and the flange are provided with a transition fillet therebetween.

In some examples of the present invention, the thermal insulation is one of an aerogel thermal insulation, a mica thermal insulation, a plastic thermal insulation, and a rubber thermal insulation; and/or the heat-conducting plate is one of a copper heat-conducting plate, an aluminum heat-conducting plate and a graphene heat-conducting plate.

According to the utility model discloses a battery pack, include: a plurality of cells; the cooling assembly is arranged on at least one side of the battery cells and extends along the arrangement direction of the battery cells; the battery cell partition board is positioned between two adjacent battery cells and connected with the cooling assembly.

In some examples of the present invention, the heat conducting plate includes at least one flange, the flange is disposed adjacent to the electric core and between the cooling assemblies, the flange is set to keep away from the extending direction of the heat conducting plate is the first direction, the flange is in the size on the first direction is c, single the electric core is in the size on the first direction is d, and the relation between c and d is: c is more than or equal to 0.1d and less than or equal to d.

According to the utility model discloses a vehicle, include: the battery pack described above.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a cell separator according to an embodiment of the present invention;

fig. 2 is a partial cross-sectional view of a cell separator according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a battery pack according to another embodiment of the present invention;

fig. 4 is an enlarged view of a portion a in fig. 3.

Reference numerals:

1. a battery core clapboard;

10. a thermal insulation member; 20. a heat conducting plate; 21. a cavity; 22. a plate body; 23. a contact portion; 24. a bending section; 25. a connecting portion; 26. flanging; 27. a transition fillet; 2. a battery pack; 30. an electric core; 40. and cooling the assembly.

Detailed Description

Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.

A cell partition 1 according to an embodiment of the present invention is described below with reference to fig. 1 to 4, in which the cell partition 1 is disposed between two adjacent cells 30 of the battery pack 2.

As shown in fig. 1 and fig. 2, the battery cell partition board 1 according to the embodiment of the present invention is characterized by comprising: an insulating member 10 and a heat conductive plate 20. The heat insulation piece 10 has a low heat conductivity coefficient, can play a role in heat insulation, and can isolate the thermal runaway phenomenon of the battery core 30 within a certain time when the battery core partition plate 1 is arranged between the battery cores 30, so that the safety of the battery pack 2 in the thermal runaway can be improved. The heat conducting plate 20 has a heat conducting function, so that more heat can be transferred through the heat conducting plate 20 more quickly, and a better heat dissipation effect can be achieved.

As shown in fig. 2, a cavity 21 is formed in the heat conducting plate 20, and the heat insulator 10 is disposed in the cavity 21. Like this heat insulating part 10 can set up in heat-conducting plate 20, heat insulating part 10 can isolated heat, and the heat can transmit to heat-conducting plate 20 more, and the heat can not be through heat insulating part 10 in cavity 21, but through the transmission of heat-conducting plate 20 and cooling, thereby play fine heat conduction effect when thermal-insulated, in addition, set up heat insulating part 10 in cavity 21, can make heat insulating part 10's setting more firm like this, heat insulating part 10 can work more steadily, and heat-conducting plate 20 can form a whole with heat insulating part 10, the setting of electric core baffle 1 of being convenient for like this, electric core baffle 1 is simple and convenient when the installation.

As shown in fig. 1 and 2, the heat-conducting plate 20 includes: the plate comprises two oppositely arranged plate bodies 22, edges of the two plate bodies 22 are fixedly connected, and a cavity 21 is formed between the two plate bodies 22. That is, heat may be transferred to the two plate bodies 22, respectively, and the heat is transferred and cooled by the two plate bodies 22. And the edges of the two plate bodies 22 are fixedly connected, so that the two plate bodies 22 can be connected into a whole, which is convenient for installing the heat conducting plate 20, in addition, a cavity 21 is formed between the two plate bodies 22, the heat insulating part 10 is arranged in the cavity 21, so that the heat insulating part 10 can play a heat insulating role, and the heat insulating part 10 and the two plate bodies 22 form a whole, which is convenient for installing and setting the battery core partition board 1.

Specifically, as shown in fig. 1 and 2, the two plate bodies 22 each include: the heat insulation member 10 comprises a contact portion 23, a bent portion 24 and a connecting portion 25, wherein the bent portion 24 is connected between the contact portion 23 and the connecting portion 25, the connecting portions 25 of the two plate bodies 22 are fixedly connected, the contact portion 23 and the bent portion 24 define a cavity 21, and the heat insulation member 10 is arranged in the cavity 21. The contact portion 23 mainly functions as a contact, and heat can be transferred and cooled through the contact portion 23. The contact portion 23 and the bent portion 24 define a cavity 21, and the heat insulating member 10 is disposed in the cavity 21, so that heat of the battery cell 30 cannot be transferred from the cavity 21 to the contact portion 23 of one plate 22 through the contact portion 23 of the other plate 22, thereby performing a heat insulating function. The bent portion 24 is bent to connect the bent portion 24 between the contact portion 23 and the connection portion 25, so that after the bent portion 24 is bent, the gap between the connection portions 25 of the two plate bodies 22 is smaller, thereby enabling the connection portions 25 of the two plate bodies 22 to be fixedly connected better.

Of course, the two connection portions 25 are connected by welding, or the two connection portions 25 are connected by bonding. The two connecting portions 25 can be connected by welding, for example: ultrasonic welding, which can firmly connect the two connecting portions 25, improves the connection reliability between the two connecting portions 25. The two connecting portions 25 may also be connected by means of an adhesive, for example: the two connecting parts 25 can be connected stably and reliably by bonding through the adhesive, and the connection is convenient and low in cost.

In addition, as shown in fig. 1, the edge of the plate body 22 is further provided with a flange 26, and the flange 26 extends toward the side away from the plate body 22. The flange 26 is further arranged at the edge of the plate body 22, so that heat can be transferred to the flange 26, the flange 26 can be better contacted with other cooling components, so that heat exchange can be realized, the flange 26 extends towards one side far away from the plate body 22, so that the contact area between the flange 26 and the cooling components can be increased, and heat can be transferred to the cooling components better and faster.

According to an alternative embodiment of the present invention, the flange 26 is perpendicular to the plate body 22, the dimension of the heat insulation member 10 in the first direction is a, the dimension of the plate body 22 in the first direction is b, and a and b satisfy the relation: a is more than or equal to 1mm and less than or equal to 3mm, and b is more than or equal to 0.1mm and less than or equal to 0.5mm. It should be noted that, the volume percentage of the heat insulating member 10 in the battery cell separator 1 is 50% to 94%, the extending direction of the turned-over edge 26 away from the plate body 22 is set to be the first direction, and when the turned-over edge 26 is perpendicular to the plate body 22, when the size of the heat insulating member 10 in the first direction is 1mm, and the size of the heat conducting plate 20 in the first direction is 0.5mm, the volume percentage of the heat insulating member 10 in the battery cell separator 1 is 50%; when the dimension of the heat insulating member 10 in the first direction is 3mm and the dimension of the plate body 22 in the first direction is 0.1mm, the volume of the heat insulating member 10 in the cell partition board 1 is 94%, so that the whole arrangement of the cell partition board 1 is more stable, and the heat insulating effect of the heat insulating member 10 is better. In addition, the size range of the plate body 22 is reasonable, which does not affect the structural strength of the plate body 22 too little, that is, the plate body 22 is easy to be damaged, and is not too large to cause the structure to be too strong and difficult to be bent to form the bent portion 24.

As shown in fig. 4, a transition fillet 27 is provided between the plate body 22 and the flange 26. When electric core baffle 1 sets up between electric core 30, because the end angle department of electric core 30 sets to the fillet structure, be provided with transition fillet 27 between plate body 22 and turn-ups 26, transition fillet 27 can with the end angle department looks adaptation of electric core 30 like this, reduce the condition of taking place the interference with electric core 30, also can promote electric core baffle 1's installation stability to a certain extent, can avoid producing stress concentration in end angle department simultaneously, improve electric core baffle 1's structural stability.

Optionally, the insulation 10 is one of an aerogel insulation 10, a mica insulation 10, a plastic insulation 10, and a rubber insulation 10. That is to say, the material of heat insulating part 10 can be aerogel, mica, in plastics and the rubber, aerogel, mica, the coefficient of heat conductivity of plastics and rubber is all lower, can play thermal-insulated effect well, in addition, when electric core baffle 1 sets up between electric core 30, because electric core 30 can take place the expanded phenomenon, and aerogel, mica, plastics and rubber all have compressible performance, so when electric core 30 takes place the inflation, aerogel, mica, plastics and rubber can leave certain expansion space for electric core 30, electric core 30 can be to the aerogel, mica, plastics and rubber department inflation, thereby can avoid electric core 30 inflation explosion.

In addition, the heat conductive plate 20 is one of a copper heat conductive plate 20, an aluminum heat conductive plate 20, and a graphene heat conductive plate 20. That is to say, the heat conducting plate 20 can be made of copper, aluminum and graphene, wherein copper and aluminum are metal pieces with good heat conductivity, and certainly, the heat conducting plate 20 can also be made of other metal pieces with good heat conductivity, and the graphene has high heat conductivity, so as to achieve a good heat conductivity effect.

As shown in fig. 3 and 4, the battery pack 2 according to the embodiment of the present invention includes: a plurality of electric cores 30, cooling module 40 and the electric core baffle 1 described in the above embodiments, the cooling module 40 is disposed on at least one side of the plurality of electric cores 30, and extends along the arrangement direction of the plurality of electric cores 30, the electric core baffle 1 is located between two adjacent electric cores 30, and the electric core baffle 1 is connected with the cooling module 40. Set up cooling module 40 in a plurality of electric cores 30's at least one side to extend along a plurality of electric cores 30's array orientation, electric core baffle 1 is connected with cooling module 40 moreover, and more heat of electric core 30 can transmit earlier to electric core baffle 1 like this, then transmits heat to cooling module 40 through electric core baffle 1, thereby can cool down the cooling to electric core 30 better.

In addition, the heat-conducting plate 20 comprises: at least one turn-ups 26, turn-ups 26 set up between electric core 30 and cooling module 40, set for turn-ups 26 to the extending direction who keeps away from heat-conducting plate 20 to be the first direction, turn-ups 26 is c in the size of first direction, and the size of single electric core 30 in the first direction is d, and the relation between c and d is: c is more than or equal to 0.1d and less than or equal to d. The flanging 26 is arranged between the battery core 30 and the cooling assembly 40, so that when the battery core 30 is installed in place, the flanging 26 can be directly pressed by the battery core 30, and the installation is simple and convenient. The flange 26 extends away from the plate body 22, so that the contact area between the flange 26 and the cooling assembly 40 can be increased, and the heat of the battery cell 30 can be better and faster transferred to the cooling assembly 40. In addition, the extending direction of the flange 26 away from the plate 22 is set as a first direction, the proportion of the dimension of the flange 26 in the first direction to the dimension of the battery cell 30 in the first direction is 10% -100%, the flange 26 can extend to completely cover the bottom surface of the battery cell 30, and even can be overlapped with the flange 26 of the adjacent battery cell separator 1, and certainly, the flange 26 at least needs a certain extending dimension to ensure contact with the cooling component 40. In this way, the flange 26 is in contact with the cooling assembly 40 as much as possible, so that heat can be better and faster transferred to the cooling assembly 40, and therefore the battery core 30 can be better cooled.

According to the utility model discloses vehicle, include: the battery pack 2 described in the above embodiment.

In the description of the present invention, it is to 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", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features. In the description of the present invention, "a plurality" means two or more. In the description of the present invention, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween. In the description of the invention, the first feature being "on", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cell separator (1), comprising:

a heat insulator (10); and

the heat conducting plate (20), cavity (21) is formed in the heat conducting plate (20), and heat insulating part (10) sets up in cavity (21).

2. The cell separator (1) according to claim 1, wherein the thermally conductive plate (20) comprises: the plate comprises two plate bodies (22) which are arranged oppositely, the edges of the two plate bodies (22) are fixedly connected, and the cavity (21) is formed between the two plate bodies (22).

3. The cell separator (1) according to claim 2, wherein both of the plate bodies (22) comprise: contact portion (23), kink (24) and connecting portion (25), kink (24) connect in contact portion (23) with between connecting portion (25), two plate body (22) connecting portion (25) fixed connection, contact portion (23) with kink (24) prescribe a limit to cavity (21), heat insulating part (10) is located in cavity (21).

4. The cell separator (1) according to claim 2, wherein the edge of the plate body (22) is further provided with a flange (26), and the flange (26) extends towards the side away from the plate body (22).

5. The cell separator (1) according to claim 4, wherein the turned-over edge (26) is perpendicular to the plate body (22), the extending direction of the turned-over edge (26) away from the plate body (22) is set to be a first direction, the dimension of the thermal insulation member (10) in the first direction is a, the dimension of the plate body (22) in the first direction is b, and a and b satisfy the relation: a is more than or equal to 1mm and less than or equal to 3mm, and b is more than or equal to 0.1mm and less than or equal to 0.5mm.

6. The cell separator (1) according to claim 4, wherein a transition radius (27) is provided between the plate body (22) and the bead (26).

7. The cell separator (1) of claim 1, wherein the insulation (10) is one of an aerogel insulation (10), a mica insulation (10), a plastic insulation (10), and a rubber insulation (10); and/or

The heat conduction plate (20) is one of a copper heat conduction plate (20), an aluminum heat conduction plate (20) and a graphene heat conduction plate (20).

8. A battery pack (2), comprising:

a plurality of cells (30);

a cooling assembly (40), wherein the cooling assembly (40) is arranged on at least one side of the plurality of battery cells (30) and extends along the arrangement direction of the plurality of battery cells (30);

the cell separator (1) of any of claims 1 to 7, the cell separator (1) being located between two adjacent cells (30) and being connected to the cooling assembly (40).

9. The battery pack (2) according to claim 8, wherein the thermally conductive plate (20) comprises at least one flange (26), the flange (26) is disposed between the battery cells (30) and the cooling assembly (40), the extending direction of the flange (26) away from the thermally conductive plate (20) is set to be a first direction, the dimension of the flange (26) in the first direction is c, the dimension of a single battery cell (30) in the first direction is d, and the relationship between c and d is: c is more than or equal to 0.1d and less than or equal to d.

10. A vehicle, characterized by comprising: the battery pack (2) according to any one of claims 8 to 9.