CN217788535U

CN217788535U - Battery pack with liquid cooling plate

Info

Publication number: CN217788535U
Application number: CN202221525000.XU
Authority: CN
Inventors: 刘攀; 黄伟; 刘华俊
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2022-06-17
Filing date: 2022-06-17
Publication date: 2022-11-11
Anticipated expiration: 2032-06-17
Also published as: WO2023240897A1

Abstract

The utility model belongs to the technical field of the battery, a battery package with liquid cooling board is disclosed. The battery pack includes a liquid-cooled plate and at least one battery module. Wherein, the battery module includes the electric core of a plurality of vertical settings. The liquid cooling plate comprises a liquid cooling top plate and a liquid cooling bottom plate, a flow channel is arranged on the liquid cooling top plate, the liquid cooling bottom plate is provided with a first end face and a second end face, the liquid cooling top plate is connected to the first end face, the second end face is arranged towards the battery module, and the liquid cooling bottom plate is perpendicular to the battery core. This battery package has good heat conductivility to the setting of liquid cold plate can not lead to the fact the influence to the straightness that hangs down of electric core, has effectively avoided the problem of electric core because of the contact short circuit.

Description

Battery pack with liquid cooling plate

Technical Field

The utility model relates to a battery technology field especially relates to a battery package with liquid cooling board.

Background

With the development of power batteries, the power batteries gradually become a power source of electric vehicles. Temperature has a great influence on the performance and life of the power battery. When the electric automobile runs under different working conditions of acceleration, constant speed, deceleration and the like, the battery discharges at different multiplying powers. Meanwhile, heat in the battery pack is continuously accumulated, and if the generated heat cannot be taken out of the battery pack in time, the service life of the battery and even the safety of the whole vehicle can be endangered by the overheat temperature. Therefore, a power battery thermal management system is generally required to perform heat dissipation treatment on the power battery. Liquid cooled panels are a key component in thermal management systems. The reasonable arrangement of the structure and the arrangement of the liquid cooling plate has important significance on the cycle life of the power battery and the safety of the electric automobile.

The liquid cooling board among the prior art sets up in the side of battery module, and the runner sets up towards electric core. Due to the fact that the uneven part on the surface of the flow channel affects the verticality of the battery cell, the battery cell is inclined, and the battery cell is easy to contact with a short circuit and the like.

Therefore, it is desirable to provide a battery pack with a liquid-cooled plate to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery package with liquid cold drawing, this battery package have good heat conductivility to liquid cold drawing setting can not lead to the fact the influence to the straightness that hangs down of electric core, effectively avoids the short circuit problem that electric core caused because of the contact.

To achieve the purpose, the utility model adopts the following technical proposal:

a battery pack with a liquid cold plate, the battery pack comprising:

the battery module comprises a plurality of vertically arranged battery cores;

the liquid cooling plate comprises a liquid cooling top plate and a liquid cooling bottom plate, a flow channel is arranged on the liquid cooling top plate, the liquid cooling bottom plate is provided with a first end face and a second end face, the liquid cooling top plate is connected to the first end face, the second end face faces towards the battery module, and the liquid cooling bottom plate is perpendicular to the battery core.

Optionally, a heat-conducting adhesive is arranged between the liquid cooling plate and the battery module, and the heat-conducting adhesive and the second end face are attached to each other.

Optionally, the liquid cooling bottom plate has an installation groove, the liquid cooling roof sets up in the installation groove, the outer bottom surface of installation groove forms the second terminal surface.

Optionally, the battery includes still includes the top backplate, the top backplate sets up the top of liquid cooling roof, the top backplate with liquid cooling board sealing connection.

Optionally, the top guard plate has an upwardly protruding cavity, and the cavity is arranged opposite to the liquid cooling top plate.

Optionally, a heat preservation foam is arranged between the top protection plate and the liquid cooling top plate.

Optionally, the outer side of the top guard plate is provided with an anti-stone-impact coating.

Optionally, the battery module includes a support, a plurality of positioning grooves are arranged on the support, and the bottom of the battery core is placed in the positioning grooves.

Optionally, the battery module further comprises a tray, a plurality of pressure relief holes are formed in the tray, a through hole is formed in the bottom of the positioning groove, a supporting portion is arranged at the bottom of the support and is in contact with the tray, and the through hole is communicated with the pressure relief holes.

Optionally, the supporting portion is an annular rib, one end of the annular rib is communicated with the through hole, and the other end of the annular rib is communicated with the pressure relief hole.

Optionally, the battery pack further comprises a box body, and the liquid cooling plate is connected with the box body in a sealing mode.

Optionally, a baffle is arranged inside the box body, the baffle divides the inside of the box body into a plurality of compartments, and the battery module is arranged in the compartments.

Has the advantages that:

the utility model provides a battery package with liquid cold drawing cools down the inside of battery package through setting up the liquid cold drawing to prevent that electric core high temperature. The liquid cooling plate in this battery package includes liquid cooling bottom plate and liquid cooling roof, has arranged the runner on the liquid cooling roof, and the liquid cooling bottom plate has first terminal surface and second terminal surface, connects the first terminal surface at the liquid cooling bottom plate with the liquid cooling roof to the one side of whole liquid cooling plate is unevenness's terminal surface, and the another side is flat terminal surface. With flat second terminal surface towards the battery module setting, again because the vertical setting of electric core, the terminal surface and the perpendicular setting of electric core of liquid cooling board, consequently, the liquid cooling board can not lead to the fact the influence to the straightness that hangs down of electric core, has guaranteed that the electric core position does not take place the skew, has ensured the security performance of battery.

Drawings

Fig. 1 is an exploded view of a liquid cold plate provided by the present invention;

fig. 2 is a schematic structural diagram of a liquid cooling plate provided by the present invention;

fig. 3 is an exploded view of a battery pack provided by the present invention;

fig. 4 is a first schematic structural diagram of a bracket provided by the present invention;

fig. 5 is a schematic structural diagram ii of the bracket provided by the present invention;

fig. 6 is a schematic structural diagram of a tray provided by the present invention.

In the figure:

100. a battery module; 110. a support; 111. positioning a groove; 112. a support portion; 120. a tray; 121. a pressure relief vent; 130. a bus bar; 200. a liquid-cooled plate; 210. liquid cooling bottom plate; 220. liquid cooling the top plate; 221. a flow channel; 300. a top guard plate; 310. a connecting plate; 400. heat preservation foam; 500. a box body; 510. a separator.

Detailed Description

The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

Referring to fig. 1 to 3, the present embodiment provides a battery pack having a liquid-cooling plate 200, which includes at least one battery module 100 and the liquid-cooling plate 200. The battery module 100 includes a plurality of vertically disposed cells. The liquid cooling plate 200 includes a liquid cooling top plate 220 and a liquid cooling bottom plate 210, the liquid cooling top plate 220 is provided with a flow channel 221, the liquid cooling bottom plate 210 has a first end face and a second end face, the liquid cooling top plate 220 is connected to the first end face, and the second end face is disposed toward the battery module 100.

The above-mentioned battery package that has liquid cooling board 200 cools down the inside of battery package through setting up liquid cooling board 200 to prevent that electric core temperature is too high. Liquid cooling board 200 in this battery package includes liquid cooling bottom plate 210 and the liquid cooling roof 220 that is provided with runner 221, liquid cooling bottom plate 210 has first terminal surface and second terminal surface, connect liquid cooling roof 220 and first terminal surface, thereby one side of whole liquid cooling board 200 is unevenness's terminal surface, the another side is flat terminal surface, set up flat second terminal surface towards battery module 100, again because the vertical setting of electric core, the terminal surface and the perpendicular setting of electric core of liquid cooling board 200, consequently, the heat conduction glue can not lead to the fact the influence to the straightness that hangs down of electric core, it does not take place the skew to have guaranteed the electric core position, the security performance of battery has been ensured, in addition, the axial coefficient of heat conductivity of electric core is more than ten times radial, liquid cooling board 200 and the perpendicular setting of electric core can make full use of the high advantage of electric core axial coefficient of heat conductivity.

Further, with continued reference to fig. 1 and 2, in the present embodiment, the liquid-cooled top plate 220 is formed by a stamping process, and the raised portion of the liquid-cooled top plate 220 forms the flow channel 221. Referring to fig. 3, since four battery modules 100 are arranged in the present embodiment, the flow channels 221 of the liquid-cooled top plate 220 form four relatively dense partitions. The liquid cooling bottom plate 210 is provided with a cooling liquid inlet and a cooling liquid outlet, and cooling liquid can enter the flow channel 221 through the cooling liquid, flow through the whole flow channel 221, and flow out from the cooling liquid outlet, so that all the battery modules 100 of the battery pack are cooled. The flow channel 221 may be in a shape of a Chinese character 'hui', an S-shape, or other shapes, and is not limited herein. The periphery of the liquid-cooled top plate 220 is a flat edge for connection with the liquid-cooled bottom plate 210. Alternatively, the liquid-cooled top plate 220 and the liquid-cooled bottom plate 210 may be welded by brazing, but other connecting methods may be used in other embodiments. Optionally, set up the thickness reduction district on liquid cooling roof 220 or liquid cooling bottom plate 210, when taking place thermal runaway, the reduction district suffers destruction to coolant liquid flows out from liquid cooling board 200, can comparatively directly cool off electric core, prevents the emergence of thermal spreading, reduces the risk that the battery package catches fire or explodes. Optionally, the liquid cooling plate 200 is disposed on the top of the battery core, and can replace a top cover plate with a battery pack, so that the cost of the battery pack is saved.

Further, a heat conducting adhesive (not shown) is disposed between the liquid cooling plate 200 and the battery module 100, and the heat conducting adhesive and the second end face are attached to each other. Since the second flat end surface of the liquid cooling plate 200 directly contacts with the heat conductive adhesive, the heat conductive adhesive can be uniformly coated between the battery module 100 and the liquid cooling plate 200, can uniformly transfer heat, and has good heat conductivity.

Further, the liquid cooling bottom plate 210 has a mounting groove, and the liquid cooling top plate 220 is disposed in the mounting groove. The setting of mounting groove can carry on spacingly to liquid cooling roof 220, makes things convenient for the assembly of liquid cooling roof 220 and liquid cooling bottom plate 210, prevents that liquid cooling roof 220 from taking place the offset on liquid cooling bottom plate 210. The periphery of the notch of the mounting groove is provided with a flat edge for connecting and assembling with an adjacent component. Furthermore, the outer bottom surface of the mounting groove forms a second end surface which is directly contacted with the heat-conducting glue. One side of the liquid cooling plate 200 facing the battery module 100 is provided with an insulating layer formed by spraying an insulating material, and the thickness and the heat conductivity of the insulating layer are controlled in the spraying process to reduce the thermal resistance.

Further, the battery pack further comprises a top protection plate 300, wherein the top protection plate 300 is arranged above the liquid cooling top plate 220, and the top protection plate 300 is hermetically connected with the liquid cooling plate 200. Specifically, the peripheral edge of the top protection plate 300 and the peripheral edge of the liquid cooling bottom plate 210 are connected by welding or screwing. Alternatively, a positioning hole may be formed in one of the top protection plate 300 and the liquid cooling plate 200, and a positioning post may be formed in the other to position the top protection plate and the liquid cooling plate, so as to facilitate assembly. The provision of the top protection plate 300 can protect the liquid cooling plate 200 from being directly corroded by air, rainwater, etc., thereby improving the safety of the battery pack and extending the service life of the battery pack.

Further, the top plate has an upwardly protruding cavity, which is disposed opposite to the liquid-cooled top plate 220. Due to the arrangement of the cavity, a certain gap is reserved between the top protection plate 300 and the flow channel 221, and a good heat preservation effect can be achieved. Optionally, the vertical distance between the top end of the cavity and the flow channel 221 may be 0.5mm, 1mm, 1.5mm, or the like, and may be set according to actual conditions. Further, the outer side of the top guard plate 300 may be provided with a stone-impact resistant coating, which plays roles of stone-impact resistance, corrosion resistance and heat insulation.

Further, a heat preservation foam 400 is arranged between the top protection plate 300 and the liquid cooling top plate 220. Optionally, the heat preservation foam 400 is provided in plurality, and the shape is a strip, and the heat preservation foam 400 is arranged at intervals. The thermal insulation foam 400 may be fixed to the liquid-cooled top plate 220 by bonding. The arrangement of the heat preservation foam 400 can avoid the vibration beating between the top protection plate 300 and the liquid cooling plate 200, and the cost is reduced while the heat preservation effect is not reduced.

Referring to fig. 3, the battery module 100 further includes a bus bar 130, the bus bar 130 is disposed on the top of the top core, and the heat conductive glue is coated between the bus bar 130 and the liquid cooling plate 200. Busbar 130 carries out the electricity with a plurality of electric cores and connects, and at high magnification charge-discharge in-process, the heat of its production can be taken away fast to busbar 130 over-current capacity obtains increasing.

Further, referring to fig. 4, the battery module 100 includes a bracket 110, a plurality of positioning grooves 111 are disposed on the bracket 110, and the bottoms of the battery cells are placed in the positioning grooves 111. Because electric core in this embodiment is the cylinder type, consequently, constant head tank 111 is the cylinder type recess, the degree of depth and the diameter size of recess set up according to the size of electric core can, guarantee that electric core can put into wherein and play the effect of location to electric core, prevent that electric core from taking place to incline.

Further, referring to fig. 3 to 6, the battery module 100 further includes a tray 120, the tray 120 is provided with a plurality of pressure relief holes 121, the bottom of the positioning groove 111 is provided with a through hole, the bottom of the bracket 110 is provided with a supporting portion 112, the supporting portion 112 is in contact with the tray 120, and the through hole is communicated with the pressure relief holes 121. The setting of pressure release hole 121 and through-hole can be derived the heat of electric core or the gas that produces when electric core thermal runaway from the bottom of electric core fast, and the reinforcing radiating effect increases battery overall structure's security performance. Tray 120 is metal construction, and support 110 adopts plastic or other insulating material to support 110 can insulate electric core and tray 120.

Alternatively, the support portion 112 is an annular rib, one end of which communicates with the through hole and the other end of which communicates with the relief hole 121. In this embodiment, the pressure relief hole 121, the through hole, and the annular rib are concentrically disposed. The effect of ring rib lies in making the high-temperature gas that electric core thermal runaway produced discharge rapidly, and when certain electric core took place the thermal runaway, the through-hole of electric core bottom can be followed along ring rib from pressure release hole 121 discharge to the high-temperature gas of its production, and can not spread other electric cores to avoid single electric core thermal runaway to cause dangers such as battery overall damage or battery explosion. Another function of the annular rib is to support the bracket 110 on the tray 120, and in this embodiment, an outer circumference of each through hole is provided with the annular rib, so that the bracket 110 can be placed on the tray 120 in a balanced and stable manner. In other embodiments, the support portion 112 may be a block structure or an arc-shaped rib disposed at the bottom of the bracket 110.

Further, the battery pack further comprises a case 500, and the liquid cooling plate 200 is hermetically connected with the case 500. The connection between the liquid cooling plate 200 and the tank 500 may be performed by welding or by screws, and is not particularly limited. Optionally, the inside of the box 500 is provided with a baffle, the baffle can divide the inside of the box 500 into a plurality of compartments, the battery module 100 is arranged in the compartments, the tray 120 is provided with a flange, and the flange is set up on the baffle. In the present embodiment, the baffle plate divides the interior of the case 500 into four compartments, and one battery module 100 is placed in each compartment. In other embodiments, the number of the battery modules 100 may be one, two, three, or the like, and may be set according to use requirements.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A battery pack with a liquid cold plate, the battery pack comprising:

at least one battery module (100), wherein the battery module (100) comprises a plurality of vertically arranged battery cells;

liquid cooling board (200), liquid cooling board (200) are including liquid cooling roof (220) and liquid cooling bottom plate (210), be provided with runner (221) on liquid cooling roof (220), liquid cooling bottom plate (210) have first terminal surface and second terminal surface, liquid cooling roof (220) connect in first terminal surface, the second terminal surface orientation battery module (100) set up, just liquid cooling bottom plate (210) with the electric core sets up perpendicularly.

2. The battery pack with the liquid cooling plate as recited in claim 1, wherein a heat conducting adhesive is disposed between the liquid cooling plate (200) and the battery module (100), and the heat conducting adhesive is attached to the second end face.

3. A battery pack with a liquid cold plate as claimed in claim 1, wherein the liquid cooled bottom plate (210) has a mounting groove, the liquid cooled top plate (220) is disposed in the mounting groove, and the outer bottom surface of the mounting groove forms the second end surface.

4. The battery pack with a liquid cold plate as recited in claim 3, wherein the battery further comprises a top shield (300), the top shield (300) is disposed over the liquid cooled top plate (220), and the top shield (300) is sealingly connected to the liquid cooled plate (200).

5. The battery pack with the liquid cold plate as recited in claim 4, wherein the top protective plate (300) has an upwardly protruding cavity disposed opposite the liquid cooled top plate (220).

6. The battery pack with the liquid cold plate as recited in claim 5, wherein a thermal insulating foam (400) is disposed between the top protective plate (300) and the liquid cooled top plate (220).

7. The battery pack with the liquid cold plate as recited in any one of claims 4-6, wherein the top protective plate (300) is provided with an anti-stone-chip coating on the outside.

8. A battery pack with a liquid cold plate as claimed in any one of claims 1 to 6, wherein the battery module (100) comprises a bracket (110), a plurality of positioning grooves (111) are arranged on the bracket (110), and the bottoms of the electric cores are placed in the positioning grooves (111).

9. The battery pack with the liquid cooling plate as claimed in claim 8, wherein the battery module (100) further comprises a tray (120), the tray (120) is provided with a plurality of pressure relief holes (121), the bottom of the positioning groove (111) is provided with a through hole, the bottom of the bracket (110) is provided with a supporting portion (112), the supporting portion (112) is in contact with the tray (120), and the through hole is communicated with the pressure relief holes (121).

10. The battery pack with the liquid cold plate as recited in claim 9, wherein the support portion (112) is a circular rib, one end of the circular rib is communicated with the through hole, and the other end of the circular rib is communicated with the pressure relief hole (121).

11. The battery pack with the liquid cooling plate as recited in any one of claims 1 to 6, further comprising a case (500), wherein the liquid cooling plate (200) is hermetically connected with the case (500).

12. The battery pack with the liquid cold plate as recited in claim 11, wherein the interior of the case (500) is provided with baffles that divide the interior of the case (500) into a plurality of compartments, the battery modules (100) being disposed within the compartments.