CN218827450U - Battery device, battery pack, and vehicle - Google Patents

Abstract

The utility model discloses a battery device, battery package and vehicle, battery device includes: the electric core groups are provided with the first heat exchange units along one side of the first direction, the second heat exchange units are arranged along the other side of the first direction, and the first heat exchange units are not communicated with the second heat exchange units. From this to be convenient for heat transfer fluid gets into first heat transfer unit and second heat transfer unit from the both ends of second direction, in order to realize carrying out the heat dissipation in step to electric core along the both ends of second direction and along the both sides of first direction, improve the radiating efficiency of electric core, thereby realize electric core along the balanced heat dissipation of first direction, improve battery device's heat transfer ability.

Description

Battery device, battery pack and vehicle

technical field

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

Background technique

In the prior art, the cooling of the battery cells in the battery pack is generally provided with a heat exchanger on the outside of the battery cells, and the heat of the battery cells is taken away through the contact between the heat exchanger and the battery cells. In the existing heat exchanger, the temperature difference between the inlet and outlet of the heat exchange fluid will cause a large temperature difference between the inlet and outlet of the battery cell, and the side effect of the temperature rise of the heat exchanger will lead to poor heat dissipation at the position near the outlet of the heat exchange fluid or The temperature rise leads to a larger temperature difference, and the heat dissipation of the battery core is uneven.

Utility model content

The utility model aims at at least solving one of the technical problems existing in the prior art. Therefore, the first purpose of the present utility model is to provide a battery device that can realize balanced heat dissipation of the battery cells.

The second purpose of the present utility model is to provide a battery pack, including the battery device described in the above embodiments.

The third purpose of the present utility model is to provide a vehicle, which includes the battery pack or battery described in the above embodiments.

The battery device according to the embodiment of the first aspect of the present invention includes: a plurality of battery packs and a heat exchanger, a plurality of the battery cells are arranged along the first direction, and each battery pack includes at least one battery cell , the heat exchanger includes a plurality of first heat exchange units and a plurality of second heat exchange units, the first heat exchange units are provided with a first heat exchange inlet and a first heat exchange outlet; the second heat exchange The unit is provided with a second heat exchange inlet and a second heat exchange outlet; the cell group has a first direction and a second direction perpendicular to each other; the first heat exchange unit and the second heat exchange unit are arranged along the Arranged in the first direction; the first heat exchange inlet and the second heat exchange outlet are located at one end of the heat exchanger in the second direction; the first heat exchange outlet and the second heat exchange outlet A heat inlet is located at the other end of the heat exchanger in the second direction. The battery pack is provided with the first heat exchange unit on one side of the first direction, and the battery pack is provided with the second heat exchange unit on the other side in the first direction.

According to the battery device of the present invention, a first heat exchange unit and a second heat exchange unit are respectively provided on opposite sides of the battery cell along the first direction, and the inlets of the first heat exchange unit and the second heat exchange unit are respectively located at the second The two ends of the direction, so that the heat exchange fluid enters the first heat exchange unit and the second heat exchange unit from both ends of the second direction, so as to achieve the two ends of the battery cell along the second direction and both sides along the first direction Synchronous heat dissipation is performed to improve the heat dissipation efficiency of the battery cells, thereby realizing balanced heat dissipation of the battery cells along the first direction, and improving the heat exchange capacity of the battery device.

In some embodiments, the first heat exchange unit is not in communication with the second heat exchange unit.

In some embodiments, the flow direction of the heat exchange fluid in the first heat exchange unit is opposite to that in the second heat exchange unit.

In some embodiments, each of the first heat exchange units extends along the second direction, and each of the first heat exchange units has a first heat exchange channel extending along the second direction; each The second heat exchange units all extend along the second direction, and each of the second heat exchange units has a second heat exchange channel extending along the second direction.

In some embodiments, each of the first heat exchange channels includes a plurality of first sub-channels, and the plurality of first sub-channels are arranged at intervals along the third direction; each of the second heat exchange channels includes A plurality of second sub-channels, the plurality of second sub-channels are arranged at intervals along the third direction, and the third direction, the second direction and the first direction are orthogonal to each other.

In some embodiments, the first heat exchange unit includes a first heat exchange section and two second heat exchange sections, and each of the first heat exchange section and the second heat exchange section includes a plurality of the first heat exchange sections A subchannel, the volume proportion of the first subchannel in the first heat exchange section is smaller than the volume proportion of the first subchannel in at least one of the second heat exchange sections; the second heat exchange section The unit includes a third heat exchange section and two fourth heat exchange sections, and each of the third heat exchange section and the fourth heat exchange section includes a plurality of second sub-channels, and in the third heat exchange section The volume ratio of the second subchannel is smaller than the volume ratio of the second subchannel in at least one of the fourth heat exchange sections.

In some embodiments, the structural strength of the first heat exchange section is greater than the structural strength of the at least one second heat exchange section; the structural strength of the third heat exchange section is greater than that of the at least one first heat exchange section. The structural strength of the four heat exchange sections.

In some embodiments, at least one of the first heat exchange sections has a wall thickness of the first subchannel that is greater than the wall thickness of at least one of the second heat exchange sections' first subchannels; at least one of the The wall thickness of the second subchannel in the third heat exchange section is greater than the wall thickness of the second subchannel in at least one of the fourth heat exchange sections.

In some embodiments, the heat exchanger further includes: a first connecting pipe, a second connecting pipe, a third connecting pipe, and a fourth connecting pipe, the first connecting pipe is connected between two adjacent first between the first heat exchange inlets of the heat exchange units; the second connection pipe is connected between the first heat exchange outlets of two adjacent first heat exchange units; the third connection pipe connected between the second heat exchange inlets of two adjacent second heat exchange units; the fourth connecting pipe is connected between the second heat exchange inlets of two adjacent second heat exchange units between exits.

In some embodiments, the heat exchanger further includes: the inlet pipe of the first heat exchange unit, the outlet pipe of the first heat exchange unit, the inlet pipe of the second heat exchange unit, the outlet pipe of the second heat exchange unit, the first The inlet pipe of the heat exchange unit is connected to the first heat exchange inlet of the first heat exchange unit located on the outermost side in the first direction; the outlet pipe of the first heat exchange unit is connected to the outlet pipe in the first direction. The first heat exchange outlet of the first heat exchange unit located on the outermost side is connected upwards, and the outlet pipe of the first heat exchange unit is located on the same side as the inlet pipe of the first heat exchange unit in the first direction. side; the inlet pipe of the second heat exchange unit is connected to the second heat exchange inlet of the second heat exchange unit located on the outermost side in the first direction; the outlet pipe of the second heat exchange unit is connected to the The second heat exchange outlet of the second heat exchange unit located on the outermost side in the first direction is connected, and the outlet pipe of the second heat exchange unit is located at the inlet pipe of the second heat exchange unit. the other side in the first direction.

In some embodiments, the first connecting pipe, the second connecting pipe, the third connecting pipe and the fourth connecting pipe are corrugated pipes respectively.

In some embodiments, the thickness of the first heat exchange unit is L ₁ , the thickness of the second heat exchange unit is L ₂ , and the L ₁ and L ₂ satisfy: 2mm≤L ₁ ≤5mm, 2mm≤ _L2≤5mm .

In some embodiments, a first heat conduction member is provided between the first heat exchange unit and the electric core, and a second heat conduction member is provided between the second heat exchange unit and the electric core.

In some embodiments, the first heat-conducting member and the second heat-conducting member are respectively heat-conducting structural glue, heat-conducting silica gel or heat-conducting silicone grease.

The battery pack according to the embodiment of the second aspect of the present utility model includes the battery device described in any one of the embodiments of the first aspect.

The vehicle according to the embodiment of the third aspect of the present invention includes the battery pack described in the embodiment of the second aspect.

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

Description of drawings

The above and/or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

FIG. 1 is a schematic diagram of a battery pack according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of a battery device according to an embodiment of the present invention.

Fig. 3 is a schematic left view of a battery device according to an embodiment of the present invention.

Fig. 4 is a schematic diagram of some heat exchangers and battery cells according to an embodiment of the present invention.

Fig. 5 is a schematic cross-sectional view of part of the heat exchanger and the electric core according to the embodiment of the present invention.

Fig. 6 is a schematic cross-sectional view of the first heat exchange unit or the second heat exchange unit according to an embodiment of the present invention.

Fig. 7 is a schematic diagram of the distribution of the first sub-channels according to the embodiment of the present invention.

Fig. 8 is a schematic diagram of the distribution of the second sub-channels according to an embodiment of the present invention.

Reference signs:

battery pack 1000;

battery device 100;

Cell 10;

Heat exchanger 20; first heat exchange unit 21; first heat exchange section 21a; second heat exchange section 21b; first heat exchange channel 211; first sub-channel 2111; first heat exchange inlet 212; outlet 213; inlet pipe 214 of the first heat exchange unit; outlet pipe 215 of the first heat exchange unit; second heat exchange unit 22; third heat exchange section 22a; fourth heat exchange section 22b; second heat exchange channel 221; Second sub-channel 2211; second heat exchange inlet 222; second heat exchange outlet 223; second heat exchange unit inlet pipe 224; second heat exchange unit outlet pipe 225; first connecting pipe 23; second connecting pipe 24; Three connecting pipes 25; the fourth connecting pipe 26;

The first heat conduction element 31; the second heat conduction element 32;

Tray 40 ; accommodating cavity 41 .

Detailed ways

The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The following describes a battery device 100 according to an embodiment of the present invention with reference to FIGS. 1-8 . The battery device 100 includes: a plurality of electric cells Group, heat exchanger 20. The first direction A is the thickness direction of the battery cell 10, the second direction B is the length direction of the battery cell 10, the third direction C is the width direction of the battery cell 10, and the third direction C, the second direction B and the first direction A are orthogonal to each other. The dimension of the cell 10 in the length direction is defined as L, the dimension in the width direction is defined as W, and the dimension in the thickness direction is defined as D. L, W, and D satisfy: L≥W≥D.

Specifically, as shown in FIGS. 1-3 , a plurality of cell groups are arranged along the first direction A, each cell group includes a cell 10 , and the heat exchanger 20 includes a plurality of first heat exchange units 21 and a plurality of second heat exchange units 22, the first heat exchange unit 21 is provided with a first heat exchange inlet 212 and a first heat exchange outlet 213, and the second heat exchange unit 22 is provided with a second heat exchange inlet 222 and a second heat exchange The heat outlet 223, the cell pack has a first direction A and a second direction B perpendicular to each other, the first heat exchange unit 21 and the second heat exchange unit 22 are arranged along the first direction A, the first heat exchange inlet 212 and the second heat exchange unit The second heat exchange outlet 223 is located at one end of the heat exchanger 20 along the second direction B, and the first heat exchange outlet 213 and the second heat exchange inlet 222 are located at the other end of the heat exchanger 20 along the second direction A. A first heat exchange unit 21 is provided on one side along the first direction A of each cell group, and a second heat exchange unit 22 is provided on the other side along the first direction A. Here, it is taken as an example that each cell pack includes one cell 10 .

Referring to FIG. 1 and FIG. 4 , two adjacent first heat exchange units 21 and second heat exchange units 22 are arranged at intervals, and the first heat exchange unit 21 and the second heat exchange unit 22 can work independently. The first heat exchange unit 21 and the second heat exchange unit 22 are respectively arranged on both sides of the battery cell 10 along the first direction A, since the first heat exchange inlet 212 and the second heat exchange inlet 222 are respectively located At both ends of a direction A, the heat exchange fluid can enter the first heat exchange unit 21 and the second heat exchange unit 22 from different directions.

Further, referring to FIG. 4 , FIG. 7 and FIG. 8 , for example, the heat exchange fluid enters the heat exchange channel from the second heat exchange inlet 222 , and the part of the battery cell 10 adjacent to the second heat exchange inlet 222 dissipates heat quickly, and the part far away from the second heat exchange inlet 222 dissipates heat quickly. Part of the heat exchange inlet 222 dissipates heat slowly, because the heat exchange fluid takes away part of the heat on the battery cell 10 adjacent to the second heat exchange inlet 222, causing the temperature of the heat exchange fluid to rise, and the heat exchange fluid is far away from the second heat exchange inlet 222 The temperature difference of the battery cell 10 is reduced, and the heat exchange fluid takes away the heat of the battery cell 10 away from the second heat exchange inlet 222 is limited, resulting in poor heat dissipation effect of the battery cell 10 arranged far away from the second heat exchange inlet 222, and the battery cell The heat dissipation effect of 10 is different. The heat exchange fluid flowing in from the first heat exchange inlet 212 on the other side can take away the heat dissipated from the section of the battery cell 10 with poor heat dissipation effect, so that the heat dissipation capacity of the two ends of the battery cell 10 along the second direction B is the same, Reduce the influence of the temperature absorbed by the heat exchange fluid in the flow process on the heat dissipation effect.

Second, according to the battery device 100 of the embodiment of the present invention, the battery cell 10 is provided with a first heat exchange unit 21 and a second heat exchange unit 22 on opposite sides along the first direction, and the first heat exchange unit 21 and the second heat exchange unit The inlets of the heat exchange unit 22 are respectively located at both ends of the second direction B, so that the heat exchange fluid enters the first heat exchange unit 21 and the second heat exchange unit 22 from both ends of the second direction B, so as to realize the battery cell 10 Synchronous heat dissipation is carried out at both ends along the second direction B and both sides along the first direction A to improve the heat dissipation efficiency of the battery cell 10, thereby realizing balanced heat dissipation of the battery cell 10 along the first direction A and improving the heat exchange of the battery device 100 ability.

In some embodiments, the first heat exchange unit 21 is not in communication with the second heat exchange unit 22 . In this way, the heat dissipation efficiency of both ends of the battery cell 10 along the second direction B can be improved.

In some embodiments, as shown in FIG. 7 and FIG. 8 , the flow direction of the heat exchange fluid in the first heat exchange unit 21 is opposite to that in the second heat exchange unit 22 . For example, along the second direction B of the battery cell 10 , the heat exchange fluid inside the second heat exchange unit 22 may flow from left to right, and the heat exchange fluid inside the first heat exchange unit 21 may flow from right to left. As a result, the heat exchange fluids in the first heat exchange unit 21 and the second heat exchange unit 22 flow in opposite directions, which can increase the heat dissipation rate of the battery cell 10 on both sides of the battery cell 10, and can avoid the heat exchange on both sides of the battery cell 10. The flow of the hot fluid in the same direction leads to uneven heat dissipation at both ends of the battery cell 10 in the first direction A, thereby reducing the possibility of partial heat expansion of the battery cell 10 due to uneven heat dissipation, so that the battery device 100 has a more efficient heat dissipation capability. The safety and reliability of using the battery device 100 are increased.

In some embodiments, as shown in FIG. 7 and FIG. 8 , each first heat exchange unit 21 extends along the second direction B, and each first heat exchange unit 21 has a first heat exchange unit extending along the second direction B inside. The heat channel 211 ; each second heat exchange unit 22 extends along the second direction B, and each second heat exchange unit 22 has a second heat exchange channel 221 extending along the second direction B inside. Therefore, by setting the first heat exchange flow channel and the second heat exchange flow channel in the first heat exchange unit 21 and the second heat exchange unit 22 respectively, the flow of the heat exchange fluid in the heat exchange channel can be facilitated, and the electricity can be taken away. The heat transferred from the core 10 to the heat exchange unit is used to dissipate heat from the battery 10 and ensure the safety of the battery device 100 .

Further, referring to FIG. 6-FIG. 8, each first heat exchange channel 211 includes a plurality of first sub-channels 2111, and the plurality of first sub-channels 2111 are arranged at intervals along the third direction C, and each second heat exchange channel 221 It includes a plurality of second sub-channels 2211, and the plurality of second sub-channels 2211 are arranged at intervals along the third direction C. Thus, a plurality of first sub-channels 2111 and a plurality of second sub-channels 2211 are provided, and the plurality of first sub-channels 2111 and the plurality of second sub-channels 2211 are respectively spaced along the third direction C in the corresponding heat exchange channel set, so that the area where the heat exchange fluid flows in the first heat exchange channel 211 and the second heat exchange channel 221 can be increased, the flow velocity of the heat exchange fluid in the first heat exchange channel 211 and the second heat exchange channel 221 can be reduced, and the The time for the heat exchange fluid to flow in the heat exchange channel is so that the heat exchange fluid can better take away the heat dissipated by the battery cell 10 , which is beneficial to the reduction of the temperature of the battery cell 10 .

Optionally, as shown in FIG. 7 and FIG. 8, the first heat exchange unit 21 includes a first heat exchange section 21a and two second heat exchange sections 21b, and along the second direction B, the two second heat exchange sections 21b Connected to both ends of the first heat exchange section 21a, the first heat exchange section 21a and the second heat exchange section 21b both include a plurality of first sub-channels 2111, and the volume of the first sub-channels 2111 in the first heat exchange section 21a occupies The ratio is smaller than the volume ratio of the first sub-channel 2111 in the second heat exchange section 21b; the second heat exchange unit 22 includes a third heat exchange section 22a and two fourth heat exchange sections 22b, along the second direction B, two The fourth heat exchange section 22b is connected to both ends of the third heat exchange section 22a, the third heat exchange section 22a and the fourth heat exchange section 22b both include a plurality of second sub-channels 2211, the second sub-channels 2211 in the third heat exchange section 22a The volume ratio of the sub-channel 2211 is smaller than the volume ratio of the second sub-channel 2211 in the fourth heat exchange section 22b. In other words, the ratio of the total volume of the plurality of first sub-channels 2111 in the first heat exchange section 21a to the volume of the first heat exchange section 21a is smaller than the ratio of the total volume of the plurality of first sub-channels 2111 in the second heat exchange section 21b to the volume of the first heat exchange section 21b. The ratio of the volumes of the two heat exchange sections 21b; the ratio of the total volume of the multiple second sub-channels 2211 in the third heat exchange section 22a to the volume of the third heat exchange section 22a is smaller than that of the multiple second sub-channels in the fourth heat exchange section 22b The ratio of the total volume of the sub-channels 2211 to the volume of the fourth heat exchange section 22b. The total flow of the first sub-channel 2111 in the first heat exchange section 21a is less than the total flow of the first sub-channel 2111 in the second heat exchange section 21b, and the total flow of the second sub-channel 2211 in the third heat exchange section 22a is less than The total flow rate of the second sub-channel 2211 in the fourth heat exchange section 22b. For example, for the battery cell 10 with the positive and negative poles arranged at both ends, the two second heat exchange sections 21b or the fourth heat exchange section 22b arranged at the end of the heat exchanger 20 can be respectively adjacent to the battery cell 10 The two poles at both ends are arranged, so as to improve the heat dissipation efficiency near the poles at both ends of the battery cell 10 in a targeted manner. Therefore, the heat exchange capacities of the first heat exchange section 21a and the third heat exchange section 22a corresponding to the first heat exchange unit 21 and the second heat exchange unit 22 are respectively smaller than the second heat exchange section 21b and the fourth heat exchange section 22b The heat exchanging capacity is so that the two ends of the heat exchanger 20 along the second direction B have a better heat exchanging effect on the vicinity of the pole of the cell.

In some embodiments, the structural strength of the first heat exchange section 21a is greater than that of at least one second heat exchange section 21b; the structural strength of the third heat exchange section 22a is greater than that of at least one fourth heat exchange section 22b. For example, when the hole diameter of the first heat exchange channel 211 is the same as that of the second heat exchange channel 221, for the first heat exchange unit 21, fewer first sub-channels 2111 are provided in the first heat exchange section 21a, so that The ratio of the sum of the volumes of the multiple first sub-channels 2111 to the volume of the first heat exchange section 21a decreases, which can relatively increase the structural strength of the first heat exchange section 21a. Similarly, the third heat exchange section 22a and the fourth heat exchange section 22b are similar. Therefore, the structural strength of the first heat exchange section 21a is greater than that of the second heat exchange section 21b, and the structural strength of the third heat exchange section 22a is greater than that of the fourth heat exchange section 22b, so that the first heat exchange section 21a and the third heat exchange section 22a have good resistance to deformation. And when the heat exchanger 20 is arranged adjacent to the side of the electric core 10, especially when the heat exchanger 20 is arranged adjacent to the large surface of the electric core 10 (that is, the surface with the largest area among all the surfaces of the electric core 10), due to the large surface of the electric core The middle position is the surface with the largest expansion probability and/or expansion degree during the use of the battery cell 10, so that the structural strength of the first heat exchange section 21a in the middle of the heat exchanger 20 is greater than the structural strength of the second heat exchange section 21b at the end. And the structural strength of the third heat exchange section 22a is greater than that of the fourth heat exchange section 22b at the end, which can inhibit the expansion of the battery cell 10 and improve the stability of the battery cell 10 and the heat exchanger 20 .

According to some embodiments of the present invention, the wall thickness of the first subchannel 2111 of at least one first heat exchange section 21a is greater than the wall thickness of the first subchannel 2111 of at least one second heat exchange section 21b; at least one third The wall thickness of the second subchannel 2211 of the heat exchange section 22a is greater than the wall thickness of the second subchannel 2211 of at least one fourth heat exchange section 22b. That is, the wall thickness of each first subchannel 2111 corresponding to the first heat exchange section 21a is greater than the wall thickness of the corresponding second heat exchange section 21b of the first subchannel 2111; the corresponding second heat exchange section 21b of each second subchannel 2211 The wall thickness of the third heat exchange section 22a is greater than the wall thickness of the second sub-channel 2211 corresponding to the fourth heat exchange section 22b. For example, by reducing the number of the first sub-channels 2111 in the first heat exchange section 21a, the flow rate of the heat exchange fluid flowing through the first heat exchange section 21a can be reduced, and the inner surface of the first sub-channel 2111 and the electric core 10 can be increased. The distance between the outer surfaces in the first direction A realizes the increase of the wall thickness between two adjacent first sub-channels 2111 in the first heat exchange section 21a. Thus, the wall thickness of the first subchannel 2111 corresponding to the first heat exchange section 21a is greater than the wall thickness of the first subchannel 2111 corresponding to the second heat exchange section 21b, and the second subchannel 2211 corresponding to the third heat exchange section 2a The wall thickness of the second sub-channel 2211 corresponding to the fourth heat exchange section 22b can increase the structural strength of the first heat exchange section 21a and the third heat exchange section 22a. When the battery cell 10 is heated and expands and deforms, The first heat exchange unit 21 and the second heat exchange unit 22 can better restrain the deformation of the battery cell 10 along the first direction A, and increase the protection of the battery cell 10 .

Further, as shown in FIG. 2 and FIG. 3 , the heat exchanger 20 includes: a plurality of first connecting pipes 23, a plurality of second connecting pipes 24, a plurality of third connecting pipes 25, and a plurality of fourth connecting pipes 26, Each first connection pipe 23 is connected between the first heat exchange inlets 212 of two adjacent first heat exchange units 21 , and each second connection pipe 24 is connected between the first heat exchange inlets 212 of two adjacent first heat exchange units 21 . Between a heat exchange outlet 213 . Each third connection pipe 25 is connected between the second heat exchange inlets 222 of two adjacent second heat exchange units 22 , and each fourth connection pipe 26 is connected between the second heat exchange inlets 222 of two adjacent second heat exchange units 22 . Between the two heat exchange outlets 223 . In other words, a plurality of first heat exchange units 21 and a plurality of second heat exchange units 22 are arranged at intervals along the first direction A, and each first heat exchange unit 21 is provided with a first heat exchange inlet 212 and a first heat exchange outlet 213 , each second heat exchange unit 22 is provided with a second heat exchange inlet 222 and a second heat exchange outlet 223, two adjacent first heat exchange inlets 212 are connected by a first connecting pipe 23, two adjacent Two first heat exchange outlets 213 are connected by a second connecting pipe 24, two adjacent second heat exchange inlets 222 are connected by a third connecting pipe 25, and two adjacent second heat exchange outlets 223 are connected by a third connecting pipe 25. The heat exchange fluid in the first heat exchange unit 21 and the heat exchange fluid in the second heat exchange unit 22 flow in the opposite direction, so that the electric core 10 can be heated from both ends of the electric core 10. Heat dissipation.

Thus, by setting a plurality of first connecting pipes 23, second connecting pipes 24, third connecting pipes 25 and fourth connecting pipes 26, two adjacent first heat exchange units 21 are communicated, and two adjacent first heat exchange units 21 are connected. The two second heat exchange units 22 are connected to facilitate the heat exchange fluid entering the heat exchanger 20 to enter from different first heat exchange inlets 212 and second heat exchange inlets 222, thereby increasing the heat exchange efficiency of the heat exchanger 20 and realizing the first The temperature balance at the heat exchange inlet 212 and the first heat exchange outlet 213, and the temperature balance at the second heat exchange inlet 222 and the second heat exchange outlet 223 can improve the consistency of the battery cell 10, so that the battery cell 10 along The temperature difference between the two ends and the middle part in the length direction is the smallest, which maximizes the protection of the battery cell 10 and increases the service life of the battery cell 10 .

In some embodiments, referring to FIG. 2 and FIG. 3 , the heat exchanger 20 includes: the inlet pipe 214 of the first heat exchange unit, the outlet pipe 215 of the first heat exchange unit, the inlet pipe 224 of the second heat exchange unit, the second heat exchange unit The unit outlet pipe 225, the inlet pipe 214 of the first heat exchange unit is connected with the first heat exchange inlet 212 of the first heat exchange unit 21 located on the outermost side in the first direction A, the outlet pipe 215 of the first heat exchange unit is connected with the first heat exchange unit 21 The first heat exchange outlet 213 of the outermost first heat exchange unit 21 is connected in one direction A, and the outlet pipe 215 of the first heat exchange unit and the inlet pipe 214 of the first heat exchange unit are located on the same side in the first direction A. The inlet pipe 224 of the second heat exchange unit is connected to the second heat exchange inlet 222 of the second heat exchange unit 22 located on the outermost side in the first direction A, and the outlet pipe 225 of the second heat exchange unit is connected to the outlet pipe 225 of the second heat exchange unit located in the first direction A. The second heat exchange outlet 223 of the outermost second heat exchange unit 22 is connected, and the outlet pipe 225 of the second heat exchange unit and the inlet pipe 224 of the second heat exchange unit are located on the other side of A in the first direction.

Along the first direction A, after a plurality of battery cells 10, a plurality of first heat exchange units 21 and a plurality of second heat exchange units 22 are arranged, the first heat exchange unit 21 located on the outermost side has a first heat exchange inlet 212. The first heat exchange outlet 213 is respectively connected to the inlet pipe 214 of the first heat exchange unit and the outlet pipe 215 of the first heat exchange unit. The second heat exchange inlet 222, the second The heat exchange outlet 223 is respectively connected with the inlet pipe 224 of the second heat exchange unit and the outlet pipe 225 of the second heat exchange unit. The heat exchange fluid inside the plurality of first heat exchange units 21 enters from the inlet pipe 214 of the first heat exchange unit and flows out from the outlet pipe 215 of the first heat exchange unit, and the heat exchange fluid inside the plurality of second heat exchange units 22 It enters from the inlet pipe 224 of the second heat exchange unit and flows out from the outlet pipe 225 of the second heat exchange unit.

Thus, by setting the inlet pipe 214 of the first heat exchange unit, the outlet pipe 215 of the first heat exchange unit, the inlet pipe 224 of the second heat exchange unit and the outlet pipe 225 of the second heat exchange unit, it is convenient for the heat exchanger 20 to communicate with the external system. The heat exchange fluid for cooling is injected in communication, and the heat exchange fluid can flow out smoothly after passing through the heat exchanger 20 to absorb the heat of the battery cell 10 . Along the first direction A, the inlet pipe 214 of the first heat exchange unit and the outlet pipe 215 of the first heat exchange unit are arranged on one side of the battery cell 10 , the inlet pipe 224 of the second heat exchange unit and the outlet pipe 225 of the second heat exchange unit Located on the other side of the battery cell 10, it is convenient for the setting of the first heat exchange unit 21 and the second heat exchange unit 22, and reduces the external system connected to the inlet pipe 214 of the first heat exchange unit and the outlet pipe 215 of the first heat exchange unit Occupying space, improving the utilization rate of the space in the battery pack 1000.

Optionally, each first connecting pipe 23 , each second connecting pipe 24 , each third connecting pipe 25 and each fourth connecting pipe 26 are bellows respectively. Bellows is a tubular elastic sensitive element connected by foldable corrugated sheets along the folding and stretching direction. Alternatively, the material of the first connecting pipe 23 to the fourth connecting pipe 26 may be metal, and the shape of the connecting pipes may be U-shaped. Therefore, the use of corrugated tubes for the first connecting pipe 23 to the fourth connecting pipe 26 can increase the elasticity of the connecting pipes, so that the first connecting pipe 23 to the fourth connecting pipe 26 have good deformability and facilitate the adjustment of the connecting pipes.

In some embodiments, the thickness of the first heat exchange unit 21 is L ₁ , the thickness of the second heat exchange unit 22 is L ₂ , and L ₁ and L ₂ satisfy: 2mm≤L ₁ ≤5mm, 2mm≤L ₂ ≤5mm . For example, L ₁ =2.5 mm, L ₂ =2.5 mm. Therefore, by limiting the thicknesses of the first heat exchange unit 21 and the second heat exchange unit 22 so that the thickness of the heat exchanger 20 is thinner, it can effectively reduce the impact on the battery pack when it is placed between adjacent battery cells 10 . The occupation of the internal space of the battery pack 1000 is beneficial to the miniaturization design of the battery pack 1000 . At the same time, the problems that the thickness of the first heat exchanging unit 21 and the second heat exchanging unit 22 are small, the structural strength of the first heat exchanging unit 21 and the second heat exchanging unit 22 cannot be guaranteed, and the problem of weak heat dissipation can also be avoided.

In some embodiments, as shown in FIG. 5 , a first heat conduction member 31 is provided between the first heat exchange unit 21 and the electric core 10 , and a second heat conduction member is provided between the second heat exchange unit 22 and the electric core 10 32. Therefore, by providing the first heat conducting member 31 and the second heat conducting member 32 , the heat on the battery cell 10 is facilitated to be transferred to the heat exchange unit through the heat conducting member, and the heat dissipation efficiency of the battery cell 10 can be improved.

In some embodiments, the first heat-conducting member 31 and the second heat-conducting member 32 are respectively heat-conducting structural glue, heat-conducting silica gel or heat-conducting silicone grease. The first heat conducting member 31 and the second heat conducting member 32 facilitate the installation of the electric core 10 and the first heat exchanging unit 21 and the second heat exchanging unit 22 while dissipating the heat of the electric core 10 in contact with them. The element 31 and the second heat conducting element 32 also have insulation and high temperature resistance. Therefore, the first heat conduction member 31 and the second heat conduction member 32 use thermally conductive structural glue to make the heat conduction members have good thermal conductivity, which can increase the heat dissipation capability of the battery cell 10 and improve the structural strength and stability of the battery pack 1000 .

The battery pack 1000 according to the embodiment of the second aspect of the utility model includes the battery device 100 of any one of the embodiments of the first aspect.

Referring to Figures 1-8, a plurality of cell groups are arranged at intervals along the first direction A, and one side of the first direction A is provided with one of the first heat exchange unit 21 and the second heat exchange unit 22, and the first direction A The other side of the first heat exchange unit 21 and the second heat exchange unit 22 are provided with the other, and the flow direction of the heat exchange fluid inside the first heat exchange unit 21 and the second heat exchange unit 22 is opposite, so as to follow the first heat exchange unit 21 and the second heat exchange unit 22. Both ends of the two directions B simultaneously dissipate heat from the battery cell 10 . The battery pack 1000 may further include a tray 40 and a cover plate. The battery cell 10 and the heat exchanger 20 are placed in the accommodation cavity 41 defined by the tray 40 . The cover plate forms a seal for the accommodation cavity 41 . Optionally, cold plates may be provided on both sides along the width direction of the battery cell 10 to increase the heat dissipation of the two sides in the width direction of the battery cell 10 .

The battery pack 1000 according to the embodiment of the present invention includes the battery device 100 in the above embodiments, which can effectively improve the heat dissipation capability of the battery cells 10 inside the battery pack 1000 , thereby improving the safety of using the battery pack 1000 .

The vehicle according to the embodiment of the third aspect of the utility model includes the battery pack 1000 of the embodiment of the second aspect.

According to the vehicle according to the embodiment of the present invention, including the battery pack 1000 in the above-mentioned embodiment, the electric cell 10 inside the battery pack 1000 can have a good heat dissipation capability, and by strengthening the structure of the heat exchange unit, the thermal deformation of the electric cell 10 can be suppressed, Increase the safety of vehicle use and reduce the cost of vehicle use.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Axial", "Radial", "Circumferential" The orientation or positional relationship indicated by ", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, so as to Specific orientation configurations and operations, therefore, should not be construed as limitations on the invention.

In the description of the present utility model, "first feature" and "second feature" may include one or more of these features. In the description of the present utility model, "plurality" means two or more. In the description of the present utility model, "above" or "under" a first feature may include that the first and second features are in direct contact, and may also include that the first and second features are not in direct contact but through Additional characteristic contacts between them. In the description of the present invention, the first feature being "above", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is high in level on the second feature.

In the description of this specification, references to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples" are intended to mean that the implementation Specific features, structures, materials or characteristics described in an embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications, the scope of the present invention is defined by the claims and their equivalents.

Claims (16)

1. A battery device, comprising:

the battery pack comprises a plurality of battery packs, a plurality of battery packs and a plurality of control modules, wherein the battery packs are arranged along a first direction, and each battery pack comprises at least one battery cell;

a heat exchanger comprising a plurality of first heat exchange units and a plurality of second heat exchange units; the first heat exchange unit is provided with a first heat exchange inlet and a first heat exchange outlet; the second heat exchange unit is provided with a second heat exchange inlet and a second heat exchange outlet;

the electric core group is provided with a first direction and a second direction which are perpendicular to each other; the first heat exchange unit and the second heat exchange unit are arranged along the first direction; the first heat exchange inlet and the second heat exchange outlet are located at one end of the heat exchanger in the second direction; the first heat exchange outlet and the second heat exchange inlet are positioned at the other end of the heat exchanger in the second direction;

the electric core group is equipped with first heat exchange unit on one side of first direction, the electric core group is in the opposite side on first direction is equipped with second heat exchange unit.

2. The battery device of claim 1, wherein the first heat exchange unit and the second heat exchange unit are independent of each other.

3. The battery device of claim 1, wherein the heat exchange fluid in the first heat exchange unit flows in a direction opposite to the direction of the heat exchange fluid in the second heat exchange unit.

4. The battery device of claim 1, wherein each of the first heat exchange units extends along the second direction, and each of the first heat exchange units has a first heat exchange channel therein extending along the second direction;

each second heat exchange unit extends along the second direction, and a second heat exchange channel extending along the second direction is arranged in each second heat exchange unit.

5. The battery device of claim 4, wherein each of the first heat exchange channels comprises a plurality of first sub-channels, the plurality of first sub-channels being spaced apart along a third direction;

each second heat exchange channel comprises a plurality of second sub-channels which are arranged at intervals along the third direction;

the third direction, the second direction, and the first direction are orthogonal to each other.

6. The battery apparatus of claim 5, wherein the first heat exchange unit comprises a first heat exchange section and two second heat exchange sections, two of the second heat exchange sections are connected at two ends of the first heat exchange section along the second direction, the first heat exchange section and the second heat exchange section each comprise a plurality of the first sub-channels, and the volume fraction of the first sub-channels in the first heat exchange section is smaller than the volume fraction of the first sub-channels in at least one of the second heat exchange sections;

the second heat exchange unit comprises a third heat exchange section and two fourth heat exchange sections, the two fourth heat exchange sections are connected to two ends of the third heat exchange section along the second direction, the third heat exchange section and the fourth heat exchange section both comprise a plurality of second sub-channels, and the volume occupation ratio of the second sub-channels in the third heat exchange section is smaller than the volume occupation ratio of the second sub-channels in at least one fourth heat exchange section.

7. The battery apparatus of claim 6, wherein the first heat exchange segment has a structural strength greater than a structural strength of the at least one second heat exchange segment;

the structural strength of the third heat exchange section is greater than the structural strength of the at least one fourth heat exchange section.

8. The battery apparatus of claim 7, wherein at least one of the first heat exchange segments has a wall thickness of the first sub-channel that is greater than a wall thickness of the first sub-channel of at least one of the second heat exchange segments;

at least one of the third heat exchange stages has a wall thickness of the second sub-passage that is greater than a wall thickness of the second sub-passage of at least one of the fourth heat exchange stages.

9. The battery device of claim 1, wherein the heat exchanger further comprises:

the first connecting pipe is connected between the first heat exchange inlets of two adjacent first heat exchange units;

a second connection pipe connected between the first heat exchange outlets of two adjacent first heat exchange units;

the third connecting pipe is connected between the second heat exchange inlets of two adjacent second heat exchange units;

and the fourth connecting pipe is connected between the second heat exchange outlets of the two adjacent second heat exchange units.

10. The battery device of claim 9, wherein the heat exchanger further comprises:

the first heat exchange unit inlet pipe is connected with the first heat exchange inlet of the first heat exchange unit positioned on the outermost side in the first direction;

the first heat exchange unit outlet pipe is connected with the first heat exchange outlet of the first heat exchange unit positioned on the outermost side in the first direction, and the first heat exchange unit outlet pipe and the first heat exchange unit inlet pipe are positioned on the same side in the first direction;

the second heat exchange unit inlet pipe is connected with the second heat exchange inlet of the second heat exchange unit positioned on the outermost side in the first direction;

and the outlet pipe of the second heat exchange unit is connected with the second heat exchange outlet of the second heat exchange unit positioned on the outermost side in the first direction, and the outlet pipe of the second heat exchange unit and the inlet pipe of the second heat exchange unit are positioned on the other side in the first direction.

11. The battery device according to claim 9, wherein the first connection pipe, the second connection pipe, the third connection pipe, and the fourth connection pipe are each a bellows.

12. The battery device of claim 1, wherein the first heat exchange unit has a thickness L ₁ The thickness of the second heat exchange unit is L ₂ Said L is ₁ 、L ₂ Satisfies the following conditions: l is not more than 2mm ₁ ≤5mm，2mm≤L ₂ ≤5mm。

13. The battery device according to any one of claims 1 to 12, wherein a first heat conducting member is arranged between the first heat exchanging unit and the battery cell;

and a second heat conducting piece is arranged between the second heat exchange unit and the battery cell.

14. The battery device of claim 13, wherein the first and second thermal conductive members are respectively a thermally conductive structural adhesive, a thermally conductive silicone gel, or a thermally conductive silicone grease.

15. A battery pack, characterized in that it comprises a battery device according to any one of claims 1-14.

16. A vehicle characterized by comprising the battery pack according to claim 15.

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