CN220400703U

CN220400703U - Battery heat exchange device, battery pack and vehicle

Info

Publication number: CN220400703U
Application number: CN202322042065.XU
Authority: CN
Inventors: 万全友; 宋如; 李希浩; 周燕飞
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2023-07-31
Filing date: 2023-07-31
Publication date: 2024-01-26
Anticipated expiration: 2033-07-31

Abstract

The present disclosure relates to a battery heat exchange device, battery package and vehicle, this battery heat exchange device includes: a cold pipe assembly including a cold pipe for heat exchange of the battery; and the bottom plate assembly comprises a runner plate, the runner plate is provided with a liquid inlet runner and a liquid outlet runner, an outlet of the liquid inlet runner is communicated with an inlet of the cold pipe, and an inlet of the liquid outlet runner is communicated with an outlet of the cold pipe. The battery heat exchange device can simultaneously meet the heat management modes of liquid cooling liquid heat and direct cooling direct heat, can improve the overall air tightness of the device, reduce components and save space occupation.

Description

Battery heat exchange device, battery pack and vehicle

Technical Field

The disclosure relates to the technical field of direct cooling of power batteries, in particular to a battery heat exchange device, a battery pack and a vehicle.

Background

In the related art, the cooling plate of the battery pack adopts a harmonica tube form, the harmonica tube is arranged on the large surface of the battery core, the harmonica tube is connected with the harmonica tube through a hose, the harmonica tube is connected with a water inlet and a water outlet of the whole pack through the hose, the water inlet and the water outlet are structurally sealed with a tray, the air tightness of the whole structure through the hose connection is poor, the connecting assembly is more, the occupied space is larger, only the liquid cooling liquid heat requirement can be met at present, and the direct cooling and direct heating requirements can not be met.

Disclosure of Invention

The utility model aims at providing a battery heat transfer device, battery package and vehicle, this battery heat transfer device can satisfy the hot and direct-cooled direct-heated thermal management mode of liquid cooling liquid simultaneously, can also promote the holistic gas tightness of device, reduces the subassembly, practices thrift the space and occupies.

To achieve the above object, a first aspect of the present disclosure provides a battery heat exchange device, including:

a cold pipe assembly including a cold pipe for heat exchange of the battery; and

the bottom plate assembly comprises a runner plate, wherein a liquid inlet runner and a liquid outlet runner are formed on the runner plate, the liquid inlet runner is communicated with an inlet of the cold pipe, and the liquid outlet runner is communicated with an outlet of the cold pipe.

Optionally, the runner plate comprises a first plate body and a second plate body;

the first plate body is provided with a first flow channel and a second flow channel, the first plate body is in fit connection with the second plate body, and the first flow channel and the second plate body enclose the liquid inlet flow channel; the second flow passage and the second plate body enclose the liquid outlet flow passage.

Optionally, the bottom plate assembly further includes a first fixing block fixedly connected to the flow channel plate, and the first fixing block includes a first inlet, a first outlet, and a first channel communicating the first inlet and the first outlet; the first inlet is communicated with the outlet of the liquid inlet flow channel, and the first outlet is communicated with the inlet of the cold pipe; and/or

The first fixed block further comprises a second inlet, a second outlet and a second channel which is communicated with the second inlet and the second outlet; the second inlet is communicated with the outlet of the cold pipe, and the second outlet is communicated with the inlet of the liquid outlet flow channel.

Optionally, the cold pipe includes a heat exchange portion, and an inlet and an outlet that are communicated with the heat exchange portion, where the inlet and the outlet are disposed at a same end of the heat exchange portion.

Optionally, the cold pipe includes two at least heat exchange section and locates two heat exchange section one end and communicate respectively two the bending section of heat exchange section, one heat exchange section keep away from the one end of bending section forms the import of cold pipe, another heat exchange section keep away from the one end of bending section forms the export of cold pipe.

Optionally, an inlet of the cold pipe is communicated with an outlet of the liquid inlet flow channel through a first collecting pipe;

and an inlet of the cold pipe is communicated with an inlet of the liquid outlet flow channel through a second collecting pipe.

Optionally, the cold pipe assembly further comprises a second fixed block;

the first collecting pipe and/or the second collecting pipe are/is fixedly connected to the second fixing block respectively, and the first fixing block and the second fixing block are fixedly connected through a locking structure;

the first collecting pipe is connected to a first outlet of the first fixed block; and/or

The second collecting pipe is connected to the second inlet of the first fixing block.

Optionally, the first collecting pipe is inserted into the first channel through the first outlet; a first sealing element is arranged at the joint of the first collecting pipe and the first channel; and/or

The second collecting pipe is inserted into the second channel through the second inlet; and a second sealing piece is arranged at the joint of the second collecting pipe and the second channel.

Alternatively, the cold tube is configured as a harmonica tube.

Optionally, the bottom plate assembly further comprises a bottom plate body arranged below the cold pipe and connected with the runner plate.

Optionally, the bottom plate assembly further comprises a connecting joint, wherein the connecting joint is provided with a first liquid inlet, a second liquid inlet communicated with the first liquid inlet, a first liquid return port and a second liquid return port communicated with the first liquid return port;

the liquid inlet II is communicated with the inlet of the liquid inlet flow channel, and the liquid return opening II is communicated with the outlet of the liquid outlet flow channel.

Optionally, the cold pipe assembly comprises two cold pipes,

the runner plate is provided with a liquid outlet runner and two liquid inlet runners; the liquid outlet channel comprises a main channel and two sub channels which are respectively communicated with one end of the main channel; the other end of the main flow channel is communicated with the second liquid return port; the two sub-flow channels are respectively communicated with the outlets of the two cold pipes;

the two liquid inlet channels are respectively communicated with the inlets of the two cold pipes and the liquid inlet II.

In a second aspect of the disclosure, a battery pack is provided, the battery pack including a battery and the battery heat exchange device described above.

Optionally, the battery pack further comprises a tray, the tray comprises a bottom plate assembly and an annular side wall plate assembly which is arranged around the bottom plate assembly, a containing space is arranged around the bottom plate assembly and the annular side wall plate assembly, and the battery and the cold pipe assembly are arranged in the containing space;

the floor assembly forms the floor assembly.

In a third aspect of the present disclosure, there is also provided a vehicle including the battery pack described above.

Through above-mentioned technical scheme, the battery heat transfer device of this disclosure promptly, through inlet channel and the play liquid runner that sets up on the runner board of bottom plate assembly, respectively with the import and the export intercommunication of the cold tube of cold tube assembly, utilize the inlet channel to realize letting in heat transfer medium in the cold tube, realize the heat transfer (including cooling and heating) of cold tube and battery through the flow of heat transfer medium, utilize the export intercommunication of play liquid runner and a plurality of cold tubes in order to realize the discharge of heat transfer medium after the heat exchange. Compared with the connection mode that a plurality of flexible pipes and a plurality of harmonica pipes are connected through a plurality of joints in the related art, the liquid inlet flow channel and the liquid outlet flow channel are directly formed on the flow channel plate of the bottom plate assembly, the liquid cooling liquid heating heat management mode can be met, the direct cooling and direct heating heat management mode can be met, meanwhile, the whole air tightness of the device can be improved, the components are reduced, and the space occupation is saved.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

FIG. 1 is a block diagram of a battery heat exchange device provided by some embodiments of the present disclosure, wherein battery position is illustrated;

FIG. 2 is a disassembled view of a battery heat exchange device provided by some embodiments of the present disclosure;

fig. 3 is a block diagram of a first plate of a battery heat exchange device provided in some embodiments of the present disclosure;

FIG. 4 is a block diagram of a cold pipe assembly of a battery heat exchange device provided in some embodiments of the present disclosure;

FIG. 5 is a partial cross-sectional block diagram of a battery heat exchange device provided in some embodiments of the present disclosure;

FIG. 6 is a cross-sectional view of a first securing block of a battery heat exchange device provided in some embodiments of the present disclosure;

fig. 7 is a block diagram of a tray of a battery pack provided by some embodiments of the present disclosure;

fig. 8 is a disassembled view of a tray of a battery pack provided by some embodiments of the present disclosure;

fig. 9 is a schematic structural view of a bottom plate assembly of a battery pack provided in some embodiments of the present disclosure.

Description of the reference numerals

10-a battery heat exchange device; 100-cold tube assembly; 110-a cold pipe; 111-heat exchange section; 112-bending sections; 120-a first header; 130-a second header; 140-a second fixed block; 141-a through hole; 151-a first seal; 152-a second seal; 160-threaded locking member; 200-a base plate assembly; 210-a runner plate; 210 a-a liquid inlet flow channel; 210 b-a liquid outlet flow channel; 2101-a main runner; 2102-sub-flow path; 211-first plate body; 2111—runner one; 2112—runner two; 212-second plate body; 220-a first fixed block; 2201-a first inlet; 2202-a first outlet; 2203-a second inlet; 2204-second outlet; 220 a-channel one; 220 b-channel two; 221-screw holes; 230-connecting joint; 231-a first liquid inlet; 232-a second liquid return port; 240-a base plate body; 20-a tray; 20 a-a base plate assembly; 20 b-an annular side gusset assembly; 30-battery.

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

In this disclosure, unless otherwise indicated, terms of orientation such as "upper, lower, left, right" and the like are used herein to generally refer to the orientation of the drawing figures with reference to the definition of "inner, outer" referring to the inner and outer "of the contour of the corresponding element, and" distal, proximal "referring to the structure or element away from or another structure or element; in addition, it should be noted that terms such as "first, second", etc. are used to distinguish one element from another element without order or importance. In addition, in the description with reference to the drawings, the same reference numerals in different drawings denote the same elements.

As shown in fig. 1 to 9, in order to achieve the above object, the present disclosure provides a battery heat exchange device 10, the battery heat exchange device 10 including a cold pipe assembly 100 and a bottom plate assembly 200, wherein the cold pipe assembly 100 may include one or more cold pipes 110 for heat exchange of a battery 30; the bottom plate assembly 200 includes a flow channel plate 210, the flow channel plate 210 being formed with a liquid inlet channel 210a and a liquid outlet channel 210b, the outlet of the liquid inlet channel 210a being in communication with the inlet of one or more cold tubes 110, and the inlet of the liquid outlet channel 210b being in communication with the outlet of one or more cold tubes 110. It will be appreciated that the number of the cold pipes 110 may be arranged according to actual needs, for example, the number of the batteries 30 is generally plural, and the cold pipes 110 may be arranged in the longitudinal direction and the transverse direction, and may be arranged between the plurality of the batteries 30 for heat exchange of the batteries 30.

Through the above technical solution, namely, in the battery heat exchange device 10 of the present disclosure, through the liquid inlet channel 210a and the liquid outlet channel 210b disposed on the flow channel plate 210 of the bottom plate assembly 200, the liquid inlet channel 210a is respectively communicated with the cold tube 110 of the cold tube assembly 100, the heat exchange medium is introduced into the cold tube 110 by using the liquid inlet channel 210a, the heat exchange (including cooling and heating) between the cold tube 110 and the battery 30 is realized by the flow of the heat exchange medium, and the liquid outlet channel 210b is communicated with the outlet of the cold tube 110 to realize the discharge of the heat exchange medium after the heat exchange. Compared with the connection mode of connecting a plurality of harmonica pipes through a plurality of hoses and a plurality of joints in the related art, the liquid inlet channel 210a and the liquid outlet channel 210b are directly formed on the flow channel plate 210 of the bottom plate assembly 200, so that the device can adapt to higher pressure, can also meet the direct cooling and direct heating thermal management mode when meeting the liquid cooling and liquid heating thermal management mode, and can also improve the integral air tightness of the device, reduce components and save space occupation.

The flow field plate 210 may be configured in any suitable configuration, as shown in fig. 2 and 3, and in some embodiments of the present disclosure, the flow field plate 210 includes a first plate 211 and a second plate 212; a first flow channel 2111 and a second flow channel 2112 are formed on the first plate body 211, the first plate body 211 and the second plate body 212 are in fit connection, and the first flow channel 2111 and the second plate body 212 form a liquid inlet flow channel 210a; the second channel 2112 and the second plate 212 define a liquid outlet channel 210b. Wherein, one end of the inlet flow channel 210a forms an outlet of the inlet flow channel 210a for communicating with an inlet of the cold pipe 110, and the other end forms an inlet of the inlet flow channel 210a connected with the cooling system of the whole vehicle; one end of the liquid outlet channel 210b forms an inlet of the liquid outlet channel 210b for communicating with the outlet of the cold pipe 110, and the other end forms an outlet of the liquid outlet channel 210b connected with the whole vehicle cooling system, and the inlet of the liquid inlet channel 210a and the outlet of the liquid outlet channel 210b are connected with the whole vehicle cooling system, so that circulation of heat exchange medium is realized for heat exchange between the cold pipe 110 and the battery 30. It should be noted that, when the liquid cooling liquid heating thermal management mode is adopted, the heat exchange medium may be water, oil or gas; when the direct cooling and direct heating thermal management mode is adopted, the heat exchange medium can be a refrigerant, and specific reference can be made to the refrigerant material of the air conditioning system in the related art, which is not described herein.

In some embodiments, the bottom plate assembly 200 further includes a first fixed block 220 fixedly coupled to the flow conduit plate 210, the first fixed block 220 including a first inlet 2201, a first outlet 2202, and a first channel 220a communicating the first inlet 2201 and the first outlet 2202; the first inlet 2201 communicates with the outlet of the inlet flow channel 210a, and the first outlet 2202 communicates with the inlet of the cold leg 110; and/or, the first fixing block 220 further comprises a second inlet 2203, a second outlet 2204 and a second channel 220b communicating the second inlet 2203 and the second outlet 2204; the second inlet 2203 communicates with the outlet of the cold tube 110 and the second outlet 2204 communicates with the inlet of the liquid outlet channel 210b.

To facilitate connection of the outlet of the inlet channel 210a and the inlet of the outlet channel 210b to the inlet of the cold pipe 110 and the outlet of the cold pipe 110 on the flow channel plate 210, as shown in fig. 2, 4, 5 and 6, in some embodiments, the bottom plate assembly 200 further includes a first fixing block 220 fixedly connected to the flow channel plate 210, where the first fixing block 220 includes a first inlet 2201, a first outlet 2202, and a first channel 220a communicating the first inlet 2201 and the first outlet 2202; the first fixing block 220 further includes a second inlet 2203, a second outlet 2204, and a second channel 220b communicating the second inlet 2203 and the second outlet 2204; the first inlet 2201 communicates with the outlet of the inlet flow channel 210a, and the first outlet 2202 communicates with the inlet of the cold leg 110; the second inlet 2203 communicates with the outlet of the cold tube 110 and the second outlet 2204 communicates with the inlet of the liquid outlet channel 210b. The first fixing block 220 may be fixedly connected to the flow channel plate 210 by, for example, welding, where the first fixing block 220 is formed with a first channel 220a, two ends of the first channel 220a form a first inlet 2201 and a first outlet 2202, the first fixing block 220 is further formed with a second channel 220b, two ends of the second channel 220b form a second inlet 2203 and a second outlet 2204, the first inlet 2201 is directly communicated with the outlet of the liquid inlet flow channel 210a, the second outlet 2204 is directly communicated with the inlet of the liquid outlet flow channel 210b, and the first fixing block 220 fixedly arranged on the flow channel plate 210 is utilized to realize communication with the cold tube 110.

It will be appreciated that in other embodiments, the number of first fixed blocks 220 may be two, wherein one first fixed block 220 includes a first inlet 2201, a first outlet 2202, and a first channel 220a communicating the first inlet 2201 and the first outlet 2202, and the first inlet 2201 communicates with the outlet of the inlet flow channel 210a, and the first outlet 2202 communicates with the inlet of the cold pipe 110; the other first fixing block 220 includes a second inlet 2203, a second outlet 2204, and a second channel 220b communicating the second inlet 2203 and the second outlet 2204, where the second inlet 2203 communicates with the outlet of the cold tube 110, and the second outlet 2204 communicates with the inlet of the liquid outlet channel 210b, and also can communicate the solid flow channel plate 210 with the cold tube 110.

Optionally, the cold pipe 110 includes a heat exchange portion and an inlet and an outlet in communication with the heat exchange portion, the inlet and the outlet being provided at the same end of the heat exchange portion. The heat exchange portion may be configured to have any shape for exchanging heat with the battery, and the inlet and the outlet are disposed at the same end of the heat exchange portion, so as to be conveniently connected to the flow channel plate 210, i.e., the outlet of the liquid inlet channel 210a and the inlet of the liquid outlet channel 210b are disposed in the area on the flow channel plate 210, which is close to the position.

The cold pipe 110 may be configured in any suitable structure, and in some embodiments, the cold pipe 110 may include at least two heat exchange sections 111 and a bending section 112 disposed at one end of the two heat exchange sections 111 and respectively connected to the two heat exchange sections 111, where one end of the heat exchange section 111 away from the bending section 112 forms an inlet of the cold pipe 110, and the other end of the heat exchange section 111 away from the bending section 112 forms an outlet of the cold pipe 110. Wherein, two heat exchange sections 111 can parallel arrangement, utilize bending section 112 to communicate the one end of two heat exchange sections 111 each other to the import and the export of cold tube can arrange the same end at two heat exchange sections 111, conveniently connect. The battery 30 may be arranged between the two heat exchange sections 111 such that the two heat exchange sections 111 can exchange heat for the battery 30 at that location at the same time; in addition, the battery 30 may be disposed outside one heat exchange section 111 away from the other heat exchange section 111, and heat exchange of the battery 30 may be achieved by the heat exchange section 111 adjacent thereto.

It should be noted that the above-mentioned construction of the cold pipe 110 into two heat exchange sections 111 and one bending section 112 is exemplary, and in other embodiments, the heat exchange sections 111 located at both sides of the bending section 112 may be arranged into a plurality of sections connected in sequence, and the shape of the heat exchange sections 111 may be any suitable shape, for example, may be a straight line section, a curved line section, etc., which is not particularly limited herein.

In some embodiments, the cold pipe 110 may be configured in a U-shape, and the battery 30 is provided inside or outside the U-shaped cold pipe 110, and both ends of the U-shaped cold pipe 110 form an inlet and an outlet of the cold pipe 110, respectively.

To facilitate communication of the cold pipe 110 with the first fixed block 220, in some embodiments, the inlet of the cold pipe 110 communicates with the first outlet 2202 of the first fixed block 220 through the first header 120; the outlet of the cold pipe 110 communicates with the second inlet 2203 through the second header 130. Wherein the cold tube 110 may be configured as a harmonica tube or other form of flat tube. When the cold pipe 110 is a harmonica pipe, the harmonica pipe includes a plurality of internal channels for flowing heat exchange medium, the side wall of the first collecting pipe 120 is respectively communicated with one ends of the plurality of internal channels of the harmonica pipe, the side wall of the second collecting pipe 130 is respectively communicated with the other ends of the plurality of internal channels of the harmonica pipe, one ends of the first collecting pipe 120 and the second collecting pipe 130 are both plugged, the other end of the first collecting pipe 120 is communicated with the first outlet 2202 of the first fixing block 220, and the other end of the second collecting pipe 130 is communicated with the second inlet 2203 of the first fixing block 220.

Optionally, the cold tube assembly 100 further includes a second fixed block 140; the first collecting pipe 120 and/or the second collecting pipe 130 are/is fixedly connected to the second fixing block 140, and the first fixing block 220 and the second fixing block 140 are/is fixedly connected through a locking structure; the first manifold 120 is connected to a first outlet 2202 of the first fixed block 220; and/or the second header 130 is connected to the second inlet 2203 of the first fixture block 220.

In order to facilitate the connection of the first and second headers 120 and 130 with the first fixing block 220 while fixing the first and second headers 120 and 130. As shown in fig. 2 and 5, in some embodiments of the present disclosure, the cold tube assembly 100 further includes a second fixed block 140; the first collecting pipe 120 and the second collecting pipe 130 are respectively and fixedly connected to the second fixing block 140, and one ends of the first collecting pipe 120 and the second collecting pipe 130, which are far away from the cold pipe 110, respectively pass through the second fixing block 140 and are then connected to the first outlet 2202 and the second inlet 2203 of the first fixing block 220; the first and second fixing blocks 220 and 140 are fixedly coupled by a locking structure. Wherein, two through holes 141 arranged at intervals can be arranged on the second fixing block 140, one ends of the first collecting pipe 120 and the second collecting pipe 130 respectively pass through the through holes 141 and are welded to realize fixed connection, and the lower end of the first collecting pipe 120 is inserted into the first channel 220a through the first outlet 2202 of the first fixing block 220 to realize sealed communication; the lower end of the second collecting pipe 130 is inserted into the second channel 220b through the second inlet 2203 of the first fixing block 220 to realize sealing communication, and then the first fixing block 220 and the second fixing block 140 are connected and fixed through a locking structure.

It is understood that in other embodiments, there may be at least two second fixing blocks 140 corresponding to one first fixing block 220, where the first manifold 120 is fixedly connected to one second fixing block 140, and the first fixing block 220 corresponding to the second fixing block 140 is provided with a first outlet 2202 communicating with the first manifold 120; the second collecting pipe 130 is fixedly connected to another second fixing block 140, and a second inlet 2203 communicated with the second collecting pipe 130 is arranged on the first fixing block 220 corresponding to the second fixing block 140. The connection of the cold pipe 110 to the flow field plate 210 may also be accomplished.

It should be noted that the locking structure may be configured by any suitable structure, including but not limited to clamping, screwing, welding or riveting, as shown in fig. 5, in some embodiments, the locking structure includes a threaded locking member 160, a screw hole 221 provided in the first fixing block 220, and a through hole 141 provided in the second fixing block 140, where the threaded locking member 160 passes through the through hole 141 and is screwed to the screw hole 221, so as to lock the movement between the second fixing block 140 and the first fixing block 220 to achieve a fixed connection. The screw locking member 160 may be a screw or a bolt, and the second fixing block 140 is coupled to the first fixing block 220 by a screw coupling, thereby firmly coupling the first manifold 120 and the second manifold 130 fixedly coupled to the second fixing block 140 to the first fixing block 220 on the flow path plate 210.

Optionally, the first manifold 120 is plugged into the first channel 220a by the first outlet 2202; a first sealing element 151 is arranged at the joint of the first collecting pipe 120 and the first channel 220a; and/or, the second collecting pipe 130 is inserted into the second channel 220b through the second inlet 2203; the junction of the second header 130 and the second channel 220b is provided with a second seal 152.

To achieve the sealing between the first header 120 and the first channel 220a, the second header 130 and the second channel 220b, as shown in fig. 4 and 5, in some embodiments of the present disclosure, the first header 120 is inserted into the first channel 220a through the first outlet 2202; the second collecting pipe 130 is inserted into the second channel 220b through the second inlet 2203; a first sealing element 151 is arranged at the joint of the first collecting pipe 120 and the first channel 220a; the junction of the second header 130 and the second channel 220b is provided with a second seal 152. The first sealing member 151 and the second sealing member 152 may be configured as sealing rings or sealing strips, which may be disposed in the first channel 220a and the second channel 220b, or disposed on the outer sidewalls of the first manifold 120 and the second manifold 130, and after the first manifold 120 and the second manifold 130 are inserted, are used to seal the gap between the first manifold 120 and the first channel 220a and the gap between the second manifold 130 and the second channel 220 b. It should be noted that the sealing strip or the sealing strip may be made of any suitable material in the related art, including but not limited to rubber materials.

To facilitate liquid inlet and outlet of the flow channel plate 210, in some embodiments, the bottom plate assembly 200 further includes a connection joint 230, where the connection joint 230 is formed with a first liquid inlet 231, a second liquid inlet communicating with the first liquid inlet 231, a first liquid return inlet, and a second liquid return inlet 232 communicating with the first liquid return inlet; the second liquid inlet is communicated with the inlet of the liquid inlet channel 210a, and the second liquid return opening 232 is communicated with the outlet of the liquid outlet channel 210b. The connection joint 230 may be fixedly disposed on the flow channel plate 210, for example, by welding, to achieve the fixed connection between the connection joint 230 and the flow channel plate 210, and the flow channel plate 210 is further formed with an inlet of the liquid inlet channel 210a and an outlet of the liquid outlet channel 210b, a liquid inlet second of the connection joint 230 is directly communicated with the inlet of the liquid inlet channel 210a, a liquid return second 232 of the connection joint 230 is directly communicated with the outlet of the liquid outlet channel 210b, and the liquid inlet first 231 and the liquid outlet first are respectively connected with a vehicle cooling system, including a liquid cooling liquid thermal management system and/or a direct cooling direct thermal management system.

In some embodiments, the cold leg assembly 100 includes at least two cold legs 110, a flow field plate 210 formed with a liquid outlet flow field 210b and two liquid inlet flow fields 210a; the liquid outlet channel 210b comprises a main channel 2101 and two sub channels 2102 which are respectively communicated with one ends of the main channel 2101; the other end of the main flow channel 2101 is communicated with a second liquid return port 232; the two sub-channels 2102 are respectively communicated with the outlets of the two cold pipes 110; the two liquid inlet channels 210a are respectively communicated with the inlet of the two cold pipes 110 and the liquid inlet II.

As shown in fig. 1, taking two cold pipes 110 as an example, a liquid outlet pipe and two liquid inlet channels 210a are formed on the flow channel plate 210, and two sides of the liquid outlet channels are respectively arranged on the liquid inlet channels 210a, wherein the liquid outlet channels 210b include a main flow channel 2101 communicated with the connecting joint 230 and two sub flow channels 2102 respectively communicated with the main flow channel 2101, the two sub flow channels 2102 are respectively communicated with outlets of the two cold pipes 110, outlets of the two liquid inlet channels 210a are respectively communicated with inlets of the two cold pipes 110, inlets of the two liquid inlet channels 210a are respectively communicated with a liquid inlet second of the connecting joint 230, outlets of the liquid outlet channels 210b are respectively communicated with a liquid return second 232 of the connecting joint 230, and liquid inlet and liquid outlet of the two cold pipes 110 can be realized through the one flow channel plate 210 and the connecting joint 230. Note that, the liquid outlet channel 210b may have a Y-shaped structure formed by one main channel 2101 and two sub-channels 2102.

It should be noted that, the arrangement of the cold pipe assembly 100 including two cold pipes 110 and the inlet flow channels 210a and the outlet flow channels 210b of the flow channel plate 210 is exemplary, and the cold pipe assembly 100 may further include three or more cold pipes 110 and be connected by other arrangements of the inlet flow channels 210a and the outlet flow channels 210b on the flow channel plate 210, which will not be described herein.

In some embodiments, the floor assembly 200 further includes a floor body 240 disposed below the cold leg 110 and coupled to the flow field plate 210. The bottom plate body 240 may also be connected with the plurality of cold tubes 110 respectively, so as to further increase the heat exchange area with the battery 30, and improve the heat exchange efficiency, which is equivalent to the effect of a temperature equalizing plate. It should be noted that the base plate body 240 includes, but is not limited to, aluminum or aluminum alloy. For example, the base plate body 240 may be made of a 6-series or 7-series high strength aluminum alloy.

In the battery heat exchange device 10 of the disclosure, as shown in fig. 1 and 2, the heat exchange medium at the whole vehicle end passes through the connection joint 230, passes through the liquid inlet channel 210a on the flow channel plate 210 and is guided by the liquid inlet channel 210a, passes through the first fixing block 220 and the second fixing block 140, then enters the cold pipe 110 from the first collecting pipe 120, passes through the outlet of the cold pipe 110, passes through the second collecting pipe 130, the second fixing block 140 and the first fixing block 220, and then flows back to the liquid return port of the connection joint 230 from the liquid outlet channel 210b, and flows back to the whole vehicle end. In fig. 2, the solid line with an arrow indicates the liquid inlet direction, and the broken line with an arrow indicates the liquid return direction.

The floor assembly 200 may be formed as a single piece with the flow field plate 210, the floor body 240, and the annular side rails 250 by friction stir welding, brazing. According to the technical scheme, firstly, a series of structural members of a water inlet and a water outlet of the traditional battery pack are not needed; second, the overall hermeticity of the floor assembly 200 of the present disclosure is better. Unlike the conventional design in which the punched brazing sheet of the 3-series aluminum alloy of the battery pack is integrally used as the upper cover/bottom plate of the battery pack, the bottom plate body 240 can be made of 6-series or 7-series aluminum alloy only because the runner plate 210 is made of 3-series aluminum alloy, so that the strength of the bottom plate assembly 200 can be greatly improved without increasing the weight.

It should be noted that the welding includes, but is not limited to, brazing welding.

In a second aspect of the present disclosure, a battery pack is provided, where the battery pack includes the battery 30 and the battery heat exchange device 10 described above, where the battery 30 may be disposed inside or on a side portion of one or more cold tubes 110 of the battery heat exchange device 10, and heat exchange is performed through the plurality of cold tubes 110, so as to achieve cooling or heating of the battery 30, and therefore, the battery pack also has all the advantages of the battery heat exchange device 10, which are not described herein again.

In some embodiments, the battery pack further includes a tray 20, the tray 20 includes a bottom plate assembly 20a and an annular side wall plate assembly 20b surrounding the bottom plate assembly 20a, the bottom plate assembly 20a and the annular side wall plate assembly 20b surrounding a receiving space, and the battery 30 and the cold leg assembly 100 are disposed in the receiving space; wherein the floor assembly 200 forms the floor assembly 20a. The bottom plate assembly 200 may include a flow channel plate 210 and a bottom plate body 240 connected to one end of the flow channel plate 210, and the flow channel plate 210 and the bottom plate body 240 may be welded to the bottom of the annular side wall plate assembly 20b, so that the bottom plate assembly 200 and the annular side wall plate assembly 20b may enclose an accommodating space with an open upper end for installing the battery 30 and the cold pipe assembly 100. For example, a plurality of cold pipes 110 forming the cold pipe assembly 100 may be disposed inside the receiving space and pass through the inside of the plurality of batteries 30 to be better used for heat exchange of the batteries 30.

In a third aspect of the present disclosure, there is also provided a vehicle comprising the battery pack described above, wherein the vehicle comprises, but is not limited to, a battery car. It should be noted that, the vehicle further includes an integral cooling system for providing the heat exchange medium for the battery heat exchange device, including but not limited to a liquid cooling heat management system, a direct cooling direct heating management system, a driving device, a control device for implementing vehicle control, and the like, which may be set with reference to related technologies, and will not be described in detail herein.

The battery heat exchange device 10, the battery pack and the vehicle disclosed by the disclosure can greatly improve the air tightness and reliability compared with the mode of connection through multiple hoses and multiple connectors in the related art, moreover, the hoses in the related art can not bear great pressure and can only meet the liquid cooling and liquid heating thermal management mode, the liquid cooling and liquid heating thermal management mode can be realized simultaneously by forming liquid inlet and liquid outlet flow channels 210b on the flow channel plate 210 and arranging the first fixing block 220 and the second fixing block 140, and the mode of connection through screw connection and welding is adopted, so that the liquid cooling and liquid heating and direct cooling and direct heating thermal management modes on the market can be realized simultaneously. According to the technical scheme, the battery pack is internally provided with more battery cells which can be placed under the same volume because a rubber hose or an aluminum jumping pipe which are not required to be connected is not needed, so that the energy density of the battery pack is increased.

The technical scheme of the present disclosure has the following advantages:

the battery pack using the cold pipe 110 according to the prior art cannot realize direct cooling and direct heating requirements, and the technical scheme of the present disclosure can realize night cooling, liquid heating or direct cooling and direct heating at the same time.

The cooling module passes through hose connection in the current scheme package, and the technical scheme of this disclosure need not unnecessary hose, does not have intermediate transfer part.

The current scheme punching press brazing sheet runner plate 210 is 3 system aluminum alloy with the base plate, and the cold plate is as battery package bottom plate or upper cover, and intensity is all not enough, and the cold plate segmentation design of technical scheme of this disclosure contains runner region runner plate 210 and base plate and uses 3 system aluminum alloy, and another part region uses high strength aluminium.

The cold board of current scheme or cold board are to external interface and tray separation, and the cold board and tray welding shaping are directly with the interface to the technical scheme of this disclosure.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations are not described further in this disclosure in order to avoid unnecessary repetition.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims

1. A battery heat exchange device, comprising:

2. The battery heat exchange device of claim 1 wherein the flow field plate comprises a first plate body and a second plate body;

3. The battery heat exchange device of claim 2 wherein the bottom plate assembly further comprises a first fixed block fixedly attached to the flow field plate, the first fixed block comprising a first inlet, a first outlet, and a first channel communicating the first inlet and the first outlet; the first inlet is communicated with the outlet of the liquid inlet flow channel, and the first outlet is communicated with the inlet of the cold pipe; and/or

4. A battery heat exchange device according to claim 3 wherein the cold pipe comprises a heat exchange portion and an inlet and an outlet in communication with the heat exchange portion, the inlet and the outlet being provided at the same end of the heat exchange portion.

5. A battery heat exchange device according to claim 3, wherein the cold pipe comprises at least two heat exchange sections and bending sections arranged at one ends of the two heat exchange sections and respectively communicated with the two heat exchange sections, one end of the heat exchange section, which is far away from the bending sections, forms an inlet of the cold pipe, and the other end of the heat exchange section, which is far away from the bending sections, forms an outlet of the cold pipe.

6. A battery heat exchange device according to claim 3, wherein the inlet of the cold pipe communicates with the outlet of the liquid inlet flow passage through a first header;

and the outlet of the cold pipe is communicated with the inlet of the liquid outlet flow passage through a second collecting pipe.

7. The battery heat exchange device of claim 6 wherein the cold tube assembly further comprises a second fixed block;

8. The battery heat exchange device of claim 6 wherein the first header is inserted into channel one from the first outlet; a first sealing element is arranged at the joint of the first collecting pipe and the first channel; and/or

The second collecting pipe is inserted into the second channel through the second inlet;

and a second sealing piece is arranged at the joint of the second collecting pipe and the second channel.

9. The battery heat exchange device of claim 1 wherein the cold tube is configured as a harmonica tube.

10. The battery heat exchange device of claim 1 wherein the base plate assembly further comprises a base plate body disposed below the cold pipe and connected to the flow field plate.

11. The battery heat exchange device according to any one of claims 1 to 10, wherein the bottom plate assembly further comprises a connection joint, the connection joint being formed with a first liquid inlet, a second liquid inlet communicated with the first liquid inlet, a first liquid return, and a second liquid return communicated with the first liquid return;

12. The battery heat exchange device of claim 11 wherein the cold tube assembly comprises two cold tubes,

13. A battery pack comprising a battery and a battery heat exchange device according to any one of claims 1-12.

14. The battery pack of claim 13, further comprising a tray comprising a bottom plate assembly and an annular side wall plate assembly surrounding the bottom plate assembly, the bottom plate assembly and the annular side wall plate assembly surrounding a receiving space, the battery and the cold pipe assembly being disposed within the receiving space;

the floor assembly forms the floor assembly.

15. A vehicle comprising the battery pack of claim 13 or 14.