CN218827450U - Battery device, battery pack, and vehicle - Google Patents
Battery device, battery pack, and vehicle Download PDFInfo
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- CN218827450U CN218827450U CN202222002100.0U CN202222002100U CN218827450U CN 218827450 U CN218827450 U CN 218827450U CN 202222002100 U CN202222002100 U CN 202222002100U CN 218827450 U CN218827450 U CN 218827450U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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
Technical Field
The utility model belongs to the technical field of the battery technique and specifically relates to a battery device, battery package and vehicle are related to.
Background
Among the prior art, the cooling of electric core generally can set up the heat exchanger in the outside of electric core in the battery package, takes away the heat of electric core through heat exchanger and electric core contact. In the existing heat exchanger, the temperature difference of the inlet and the outlet of the heat exchange fluid can bring about a large temperature difference of the electric core at the inlet and the outlet, and the heat dissipation effect of the position close to the outlet of the heat exchange fluid is poor or the temperature rise is generated to cause a larger temperature difference due to the side effect of the temperature rise of the heat exchanger, so that the heat dissipation of the electric core is uneven.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, a first object of the present invention is to provide a battery device, which can realize the balanced heat dissipation of the battery cell.
A second object of the present invention is to provide a battery pack, which includes the battery device of the above embodiment.
A third object of the present invention is to provide a vehicle, which includes the battery pack described in the above embodiments.
According to the utility model discloses battery device of first aspect embodiment includes: the battery pack comprises a plurality of battery cores and a heat exchanger, wherein the battery cores are arranged along the first direction, each battery core pack comprises at least one battery core, the heat exchanger comprises a plurality of first heat exchange units and a plurality of second heat exchange units, and the first heat exchange units are 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 located 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.
According to the utility model discloses a battery device, electric core is equipped with first heat transfer unit and second heat transfer unit respectively along the relative both sides of first direction, the import of first heat transfer unit and second heat transfer unit is located the both ends of second direction respectively, thereby 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.
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 the flow direction of the heat exchange fluid 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 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.
In some embodiments, each of the first heat exchange channels comprises a plurality of first sub-channels, and the plurality of first sub-channels are arranged at intervals along the third direction; each second heat exchange channel comprises a plurality of second sub-channels, the second sub-channels are arranged at intervals along the third direction, and the third direction, the second direction and the first direction are mutually orthogonal.
In some embodiments, the first heat exchange unit comprises a first heat exchange section and two second heat exchange sections, 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 third heat exchange section and the fourth heat exchange sections respectively comprise a plurality of second sub-channels, and the volume ratio of the second sub-channels in the third heat exchange section is smaller than that of the second sub-channels in at least one fourth heat exchange section.
In some embodiments, the first heat exchange stage has a structural strength greater than a structural strength of the at least one second heat exchange stage; the structural strength of the third heat exchange section is greater than the structural strength of the at least one fourth heat exchange section.
In some embodiments, 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.
In some embodiments, the heat exchanger further comprises: the first connecting pipe is connected between the first heat exchange inlets of two adjacent first heat exchange units; the second connecting pipe is 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; the fourth connecting pipe is connected between the second heat exchange outlets of two adjacent second heat exchange units.
In some embodiments, 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 outlet pipe of the first heat exchange unit 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 outlet pipe of the first heat exchange unit and the inlet pipe of the first heat exchange unit 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; the second heat exchange unit outlet pipe 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 second heat exchange unit outlet pipe and the second heat exchange unit inlet pipe are positioned on the other side in the first direction.
In some embodiments, the first connection pipe, the second connection pipe, the third connection pipe, and the fourth connection pipe are bellows, respectively.
In some embodiments, 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 less than 2mm 1 ≤5mm，2mm≤L 2 ≤5mm。
In some embodiments, a first heat conducting member is disposed between the first heat exchanging unit and the battery cell, and a second heat conducting member is disposed between the second heat exchanging unit and the battery cell.
In some embodiments, the first heat conducting member and the second heat conducting member are respectively a heat conducting structural adhesive, a heat conducting silicone gel or a heat conducting silicone grease.
According to the utility model discloses battery package of second aspect embodiment, including the battery device of any one of the first aspect embodiment.
According to the utility model discloses vehicle of third aspect embodiment, including the battery package of second aspect embodiment.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic 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 left side schematic view of a battery device according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a part of a heat exchanger and a battery cell according to an embodiment of the present invention.
Fig. 5 is a schematic cross-sectional view of a part of a heat exchanger and a battery cell according to an embodiment of the present invention.
Fig. 6 is a schematic cross-sectional view of a first heat exchange unit or a second heat exchange unit according to an embodiment of the present invention.
Fig. 7 is a distribution diagram of a first sub-channel according to an embodiment of the present invention.
Fig. 8 is a schematic distribution diagram of a second sub-channel according to an embodiment of the present invention.
Reference numerals:
a battery pack 1000;
a battery device 100;
an electric core 10;
a heat exchanger 20; a first heat exchange unit 21; a first heat exchange section 21a; a second heat exchange section 21b; a first heat exchange channel 211; a first sub-channel 2111; first heat exchange inlet 212; a first heat exchange outlet 213; first heat exchange unit inlet tube 214; first heat exchange unit outlet pipe 215; a second heat exchange unit 22; a third heat exchange stage 22a; a fourth heat exchange section 22b; a second heat exchange channel 221; a second sub-passageway 2211; a second heat exchange inlet 222; a second heat exchange outlet 223; second heat exchange unit inlet pipe 224; second heat exchange unit outlet pipe 225; a first connecting pipe 23; a second connecting pipe 24; a third connection pipe 25; a fourth connection pipe 26;
a first heat-conductive member 31; a second heat-conducting member 32;
a tray 40; accommodating the cavity 41.
Detailed Description
The following describes in detail an embodiment of the present invention, the embodiment described with reference to the drawings is exemplary, and a battery device 100 according to an embodiment of the present invention is described with reference to fig. 1 to 8, the battery device 100 including: a plurality of electric core groups and a heat exchanger 20. The first direction a is a thickness direction of the battery cell 10, the second direction B is a length direction of the battery cell 10, the third direction C is a 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 battery cell 10 in the length direction is defined as L, the dimension of the battery cell in the width direction is defined as W, the dimension of the battery cell in the thickness direction is defined as D, and L, W and D satisfy: l is more than or equal to W and more than or equal to D.
Specifically, as shown in fig. 1 to fig. 3, a plurality of electric core groups are arranged along a first direction a, each electric core group includes one electric core 10, 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, the second heat exchange unit 22 is provided with a second heat exchange inlet 222 and a second heat exchange outlet 223, the electric core group 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 outlet 223 are located at one end of the heat exchanger 20 in 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. One side of each electric core group along the first direction A is provided with a first heat exchange unit 21, and the other side along the first direction A is provided with a second heat exchange unit 22. Here, each battery cell group includes one battery cell 10.
Referring to fig. 1 and 4, two adjacent first heat exchange units 21 and second heat exchange units 22 are arranged at intervals, and the first heat exchange units 21 and the second heat exchange units 22 can work independently. The first heat exchange unit 21 and the second heat exchange unit 22 are respectively disposed on two sides of the battery cell 10 along the first direction a, and since the first heat exchange inlet 212 and the second heat exchange inlet 222 are respectively located on two ends of the heat exchanger 20 along the first 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, with reference to fig. 4, 7 and 8, for example, when the heat exchange fluid enters the heat exchange channel from the second heat exchange inlet 222, the heat dissipation of the portion of the battery cell 10 adjacent to the second heat exchange inlet 222 is faster, and the heat dissipation of the portion far away from the second heat exchange inlet 222 is slower, because the heat exchange fluid takes away the portion of the heat on the battery cell 10 adjacent to the second heat exchange inlet 222, the temperature of the heat exchange fluid rises, the temperature difference between the heat exchange fluid and the battery cell 10 far away from the second heat exchange inlet 222 decreases, the portion of the heat taken away by the heat exchange fluid from the battery cell 10 far away from the second heat exchange inlet 222 is limited, so that the heat dissipation effect of the battery cell 10 far away from the second heat exchange inlet 222 is poor, and the heat dissipation effect of the battery cell 10 is different. The heat exchange fluid flowing into the first heat exchange inlet 212 on the other side may take away the heat dissipated by the section of the electrical core 10 with poor heat dissipation effect, so that the heat dissipation capacities of the two ends of the electrical core 10 along the second direction B are the same, and the influence of the temperature absorbed by the heat exchange fluid in the flowing process on the heat dissipation effect is reduced.
Second according to the utility model discloses battery device 100, electric core 10 is equipped with first heat transfer unit 21 and second heat transfer unit 22 respectively along the relative both sides of first direction, first heat transfer unit 21 and second heat transfer unit 22's import is located second direction B's both ends respectively, thereby be convenient for heat transfer fluid gets into first heat transfer unit 21 and second heat transfer unit 22 from second direction B's both ends, in order to realize carrying out the heat dissipation in step to electric core 10 along second direction B's both ends and along first direction A's both sides, improve electric core 10's radiating efficiency, thereby realize electric core 10 along first direction A's balanced heat dissipation, improve battery device 100's heat transfer ability.
In some embodiments, first heat exchange unit 21 is not in communication with second heat exchange unit 22. In this way, the heat dissipation efficiency of the two ends of the battery cell 10 in the second direction B can be improved.
In some embodiments, as shown in fig. 7 and 8, the flow direction of the heat exchange fluid in the first heat exchange unit 21 is opposite to the flow direction of the heat exchange fluid in the second heat exchange unit 22. For example, in 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. Therefore, the flow directions of the heat exchange fluids in the first heat exchange unit 21 and the second heat exchange unit 22 are opposite, the heat dissipation speed of the battery cell 10 can be increased on two sides of the battery cell 10, and the heat dissipation unevenness at two ends of the first direction a of the battery cell 10 caused by the cocurrent flow of the heat exchange fluids on two sides of the battery cell 10 can be avoided, so that the possibility that part of the battery cell 10 is heated to expand due to the heat dissipation unevenness can be reduced, the battery device 100 has more efficient heat dissipation capability, and the use safety and reliability of the battery device 100 are improved.
In some embodiments, as shown in fig. 7 and 8, each first heat exchange unit 21 extends along the second direction B, and each first heat exchange unit 21 has therein a first heat exchange channel 211 extending along the second direction B; each second heat exchange unit 22 extends along the second direction B, and each second heat exchange unit 22 has therein a second heat exchange channel 221 extending along the second direction B. Therefore, by respectively arranging 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, the heat exchange fluid can flow in the heat exchange flow channel conveniently, and the heat transferred from the battery cell 10 to the heat exchange unit is taken away, so that the heat dissipation of the battery cell 10 is realized, and the use safety of the battery device 100 is ensured.
Further, with reference to fig. 6-8, each first heat exchange channel 211 comprises a plurality of first sub-channels 2111, the plurality of first sub-channels 2111 are spaced along the third direction C, each second heat exchange channel 221 comprises a plurality of second sub-channels 2211, and the plurality of second sub-channels 2211 are spaced along the third direction C. From this, set up a plurality of first subchannels 2111 and a plurality of second subchannels 2211, and a plurality of first subchannels 2111 and a plurality of second subchannels 2211 set up along third direction C interval in the heat transfer passageway that corresponds respectively, thereby can increase the area that heat transfer fluid flows in first heat transfer passageway 211 and second heat transfer passageway 221, reduce the velocity of flow of heat transfer fluid in first heat transfer passageway 211 and second heat transfer passageway 221, increase the time that heat transfer fluid flows in the heat transfer passageway, so that the heat that electric core 10 gived off is taken away to heat transfer fluid better, be favorable to the reduction of the temperature of electric core 10.
Alternatively, as shown in fig. 7 and 8, the first heat exchange unit 21 includes a first heat exchange section 21a and two second heat exchange sections 21B, and the two second heat exchange sections 21B are connected to two ends of the first heat exchange section 21a along the second direction B, the first heat exchange section 21a and the second heat exchange section 21B each include a plurality of first sub-channels 2111, and a volume ratio of the first sub-channels 2111 in the first heat exchange section 21a is smaller than a volume ratio of the first sub-channels 2111 in the second heat exchange section 21B; the second heat exchange unit 22 comprises a third heat exchange section 22a and two fourth heat exchange sections 22B, the two fourth heat exchange sections 22B are connected to two ends of the third heat exchange section 22a along the second direction B, the third heat exchange section 22a and the fourth heat exchange section 22B both comprise a plurality of second sub-passages 2211, and the volume ratio of the second sub-passages 2211 in the third heat exchange section 22a is smaller than that of the second sub-passages 2211 in the fourth heat exchange section 22B. In other words, the ratio of the total volume of the plurality of first sub-passages 2111 in the first heat exchange section 21a to the volume of the first heat exchange section 21a is less than the ratio of the total volume of the plurality of first sub-passages 2111 in the second heat exchange section 21b to the volume of the second heat exchange section 21b; the ratio of the total volume of the plurality of second sub-passages 2211 in the third heat exchange section 22a to the volume of the third heat exchange section 22a is less than the ratio of the total volume of the plurality of second sub-passages 2211 in the fourth heat exchange section 22b to the volume of the fourth heat exchange section 22 b. The total flow of the first sub-passage 2111 in the first heat exchange section 21a is less than the total flow of the first sub-passage 2111 in the second heat exchange section 21b, and the total flow of the second sub-passage 2211 in the third heat exchange section 22a is less than the total flow of the second sub-passage 2211 in the fourth heat exchange section 22 b. For example, for the battery cell 10 with positive and negative poles disposed at two ends, two second heat exchange segments 21b or fourth heat exchange segments 22b disposed at the end of the heat exchanger 20 may be disposed adjacent to two poles at two ends of the battery cell 10, respectively, so as to purposefully improve the heat dissipation efficiency near the poles at two ends of the battery cell 10. 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 heat exchange capacities of the second heat exchange section 21B and the fourth heat exchange section 22B, so that the two ends of the heat exchanger 20 along the second direction B have a better heat exchange effect on the vicinity of the battery cell pole.
In some embodiments, the structural strength of the first heat exchange section 21a is greater than the structural strength of the at least one second heat exchange section 21b; the structural strength of the third heat exchange section 22a is greater than the structural strength of the at least one fourth heat exchange section 22 b. For example, when the aperture 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 arranged in the first heat exchange section 21a, so that the ratio of the sum of the volumes of the plurality of first sub-channels 2111 to the volume of the first heat exchange section 21a is reduced, and the structural strength of the first heat exchange section 21a can be relatively increased. Similarly, the third heat exchange stage 22a is similar to the fourth heat exchange stage 22 b. 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 deformation resistance. When the heat exchanger 20 is disposed adjacent to one surface of the battery cell 10, especially when the heat exchanger 20 is disposed adjacent to a large surface of the battery cell 10 (i.e., a surface with the largest area in all surfaces of the battery cell 10), since the middle position of the large surface of the battery cell is a surface with the largest expansion probability and/or expansion degree in the use process of the battery cell 10, 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 the structural strength of the fourth heat exchange section 22b at the end, so that expansion of the battery cell 10 can be suppressed, and the stability of the battery cell 10 and the heat exchanger 20 can be improved.
According to some embodiments of the present disclosure, at least one first heat exchange segment 21a has a wall thickness of the first sub-passage 2111 that is greater than a wall thickness of the first sub-passage 2111 of at least one second heat exchange segment 21b; the at least one third heat exchange section 22a has a second sub-passage 2211 with a wall thickness greater than a wall thickness of the second sub-passage 2211 of the at least one fourth heat exchange section 22 b. That is, the wall thickness of the corresponding first heat exchange segment 21a of each first sub-passage 2111 is greater than the wall thickness of the corresponding second heat exchange segment 21b portion of the first sub-passage 2111; the wall thickness of the corresponding portion of the third heat exchange section 22a of each of the second sub-passages 2211 is greater than the wall thickness of the corresponding portion of the fourth heat exchange section 22b of the second sub-passage 2211. For example, the increase of the wall thickness between two adjacent first sub-channels 2111 in the first heat exchange segment 21a can be achieved by reducing the number of the first sub-channels 2111 in the first heat exchange segment 21a, reducing the flow rate of the heat exchange fluid flowing through the first heat exchange segment 21a, and increasing the distance between the inner side surface of the first sub-channel 2111 and the outer surface of the battery cell 10 in the first direction a. Therefore, the wall thickness of the first sub-channel 2111 corresponding to the first heat exchange segment 21a is greater than that of the first sub-channel 2111 corresponding to the second heat exchange segment 21b, and the wall thickness of the second sub-channel 2211 corresponding to the third heat exchange segment 2a is greater than that of the second sub-channel 2211 corresponding to the fourth heat exchange segment 22b, so that the structural strength of the first heat exchange segment 21a and the structural strength of the third heat exchange segment 22a can be increased, when the battery cell 10 is heated to expand and deform, the first heat exchange unit 21 and the second heat exchange unit 22 can better inhibit deformation of the battery cell 10 along the first direction a, and protection on the battery cell 10 is increased.
Further, as shown in fig. 2 and 3, the heat exchanger 20 includes: a plurality of first connection pipes 23, a plurality of second connection pipes 24, a plurality of third connection pipes 25, and a plurality of fourth connection pipes 26, wherein 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 outlets 213 of two adjacent first heat exchange units 21. Each third connection pipe 25 is connected between the second heat exchange inlets 222 of the adjacent two second heat exchange units 22, and each fourth connection pipe 26 is connected between the second heat exchange outlets 223 of the adjacent two second heat exchange units 22. In other words, the multiple first heat exchange units 21 and the multiple second heat exchange units 22 are arranged at intervals along the first direction a, 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 through a first connecting pipe 23, two adjacent first heat exchange outlets 213 are connected through a second connecting pipe 24, two adjacent second heat exchange inlets 222 are connected through a third connecting pipe 25, two adjacent second heat exchange outlets 223 are connected through a fourth connecting pipe 26, so that the flow directions of the heat exchange fluid in the first heat exchange unit 21 and the heat exchange fluid in the second heat exchange unit 22 are opposite, and heat dissipation from two ends of the electric core 10 is realized.
Therefore, by arranging the plurality of first connecting pipes 23, the plurality of second connecting pipes 24, the plurality of third connecting pipes 25, and the plurality of fourth connecting pipes 26, so as to communicate the two adjacent first heat exchange units 21 and communicate the two adjacent second heat exchange units 22, the heat exchange fluid entering the heat exchanger 20 conveniently enters from the first heat exchange inlet 212 and the second heat exchange inlet 222 which are different from each other, the heat exchange efficiency of the heat exchanger 20 is increased, the temperature balance between the first heat exchange inlet 212 and the first heat exchange outlet 213 is realized, the temperature balance between the second heat exchange inlet 222 and the second heat exchange outlet 223 is realized, the consistency of the electrical core 10 can be improved, the temperature difference between the two ends and the middle part of the electrical core 10 along the length direction is minimized, the electrical core 10 is protected to the maximum, and the service life of the electrical core 10 is prolonged.
In some embodiments, in conjunction with fig. 2 and 3, the heat exchanger 20 includes: a first heat exchange unit inlet pipe 214, a first heat exchange unit outlet pipe 215, a second heat exchange unit inlet pipe 224 and a second heat exchange unit outlet pipe 225, wherein the first heat exchange unit inlet pipe 214 is connected with the first heat exchange inlet 212 of the first heat exchange unit 21 located at the outermost side in the first direction a, the first heat exchange unit outlet pipe 215 is connected with the first heat exchange outlet 213 of the first heat exchange unit 21 located at the outermost side in the first direction a, and the first heat exchange unit outlet pipe 215 and the first heat exchange unit inlet pipe 214 are located at the same side in the first direction a. The second heat exchange unit inlet pipe 224 is connected to the second heat exchange inlet 222 of the second heat exchange unit 22 located outermost in the first direction a, the second heat exchange unit outlet pipe 225 is connected to the second heat exchange outlet 223 of the second heat exchange unit 22 located outermost in the first direction a, and the second heat exchange unit outlet pipe 225 and the second heat exchange unit inlet pipe 224 are located at the other side in the first direction a.
After the plurality of battery cells 10, the plurality of first heat exchange units 21, and the plurality of second heat exchange units 22 are arranged along the first direction a, the first heat exchange inlet 212 and the first heat exchange outlet 213 of the first heat exchange unit 21 located at the outermost side are respectively connected to the first heat exchange unit inlet pipe 214 and the first heat exchange unit outlet pipe 215, and the second heat exchange inlet 222 and the second heat exchange outlet 223 of the second heat exchange unit 22 located at the outermost side are respectively connected to the second heat exchange unit inlet pipe 224 and the second heat exchange unit outlet pipe 225. The heat exchange fluid in the first heat exchange units 21 enters from the first heat exchange unit inlet pipe 214 and flows out from the first heat exchange unit outlet pipe 215, and the heat exchange fluid in the second heat exchange units 22 enters from the second heat exchange unit inlet pipe 224 and flows out from the second heat exchange unit outlet pipe 225.
Therefore, by arranging the first heat exchange unit inlet pipe 214, the first heat exchange unit outlet pipe 215, the second heat exchange unit inlet pipe 224 and the second heat exchange unit outlet pipe 225, the heat exchanger 20 is communicated with an external system to inject heat exchange fluid for cooling, and the heat exchange fluid can smoothly flow out after the heat exchange fluid absorbs heat of the battery cell 10 through the heat exchanger 20. Along the first direction a, the first heat exchange unit inlet pipe 214 and the first heat exchange unit outlet pipe 215 are arranged on one side of the battery cell 10, and the second heat exchange unit inlet pipe 224 and the second heat exchange unit outlet pipe 225 are arranged on the other side of the battery cell 10, so that the arrangement of the first heat exchange unit 21 and the second heat exchange unit 22 is facilitated, the occupation of an external system connected with the first heat exchange unit inlet pipe 214 and the first heat exchange unit outlet pipe 215 on the space is reduced, and the utilization rate of the space in the battery pack 1000 is improved.
Alternatively, each of the first connection pipes 23, each of the second connection pipes 24, each of the third connection pipes 25, and each of the fourth connection pipes 26 is a bellows, respectively. The corrugated pipe is a tubular elastic sensitive element which is connected by foldable corrugated sheets along the folding and stretching direction. Alternatively, the first to fourth connection pipes 23 to 26 may be made of metal, and the connection pipes may have a U-shape. Therefore, the bellows used for the first to fourth connection pipes 23 to 26 can increase the elasticity of the connection pipes, so that the first to fourth connection pipes 23 to 26 have good deformability, which facilitates the adjustment of the connection pipes.
In some embodiments, the first heat exchange unit 21 has a thickness L 1 The thickness of the second heat exchange unit 22 is L 2 ，L 1 、L 2 Satisfies the following conditions: l is not less than 2mm 1 ≤5mm，2mm≤L 2 Less than or equal to 5mm. For example, L 1 ＝2.5mm，L 2 =2.5mm. Therefore, the thickness of the heat exchanger 20 is made thinner by limiting the thicknesses of the first heat exchange unit 21 and the second heat exchange unit 22, so that the occupation of the internal space of the battery pack 1000 can be effectively reduced when the heat exchanger is placed between adjacent battery cells 10, which is beneficial to the miniaturization design of the battery pack 1000.Meanwhile, the problems that the thicknesses of the first heat exchange unit 21 and the second heat exchange unit 22 are small, the structural strengths of the first heat exchange unit 21 and the second heat exchange unit 22 cannot be guaranteed, and the heat dissipation capacity is weak can be solved.
In some embodiments, as shown in fig. 5, a first heat conduction member 31 is disposed between the first heat exchange unit 21 and the battery cell 10, and a second heat conduction member 32 is disposed between the second heat exchange unit 22 and the battery cell 10. Therefore, by arranging the first heat conduction member 31 and the second heat conduction member 32, heat on the battery cell 10 can be conveniently transferred to the heat exchange unit through the heat conduction members, and the heat dissipation efficiency of the battery cell 10 can be improved.
In some embodiments, the first heat conduction member 31 and the second heat conduction member 32 are respectively a heat conduction structural adhesive, a heat conduction silicone or a heat conduction silicone grease. The first heat conduction member 31 and the second heat conduction member 32 are used for facilitating the installation of the battery cell 10 and the first heat exchange unit 21 and the second heat exchange unit 22 while guiding out the heat of the battery cell 10 in contact therewith, and the first heat conduction member 31 and the second heat conduction member 32 are also insulating and high-temperature resistant. Therefore, the first heat conducting member 31 and the second heat conducting member 32 use heat conducting structural adhesive and the like to enable the heat conducting members to have good heat conductivity, so that the heat dissipation capacity of the battery cell 10 can be increased, and the structural strength and the stability of the battery pack 1000 are improved.
The battery pack 1000 according to an embodiment of the present invention includes the battery device 100 according to any one of the embodiments of the first aspect.
With reference to fig. 1 to 8, the plurality of battery cell groups are arranged at intervals along a first direction a, 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, the other side of the first direction a is provided with the other one of the first heat exchange unit 21 and the second heat exchange unit 22, and the flow directions of the heat exchange fluids inside the first heat exchange unit 21 and the second heat exchange unit 22 are opposite to each other, so as to simultaneously dissipate heat from the battery cells 10 along two ends of the second direction B. The battery pack 1000 may further include a tray 40 and a cover plate, the battery cell 10 and the heat exchanger 20 being disposed in a housing cavity 41 defined by the tray 40, the cover plate forming a closure to the housing cavity 41. Optionally, cold plates may be disposed on two sides of the electrical core 10 in the width direction, so as to increase heat dissipation of two sides of the electrical core 10 in the width direction.
According to the utility model discloses battery package 1000, including battery device 100 in the above-mentioned embodiment, can effectively improve the heat-sinking capability of the inside electric core 10 of battery package 1000 to can promote the security of using battery package 1000.
According to the third aspect of the present invention, a vehicle includes the battery pack 1000 of the second aspect of the present invention.
According to the utility model discloses the vehicle, including the battery package 1000 in the above-mentioned embodiment, can have good heat-sinking capability through making the inside electric core 10 of battery package 1000, and restrain electric core 10 thermal deformation through reinforcing heat transfer unit's structure, increase the security that the vehicle used, reduce the cost that the vehicle used.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features. In the description of the present invention, "a plurality" means two or more. In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact via another feature therebetween. In the description of the invention, the first feature being "on", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (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.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222002100.0U CN218827450U (en) | 2022-07-29 | 2022-07-29 | Battery device, battery pack, and vehicle |
| PCT/CN2023/109816 WO2024022479A1 (en) | 2022-07-29 | 2023-07-28 | Heat exchanger, battery pack, and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222002100.0U CN218827450U (en) | 2022-07-29 | 2022-07-29 | Battery device, battery pack, and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN218827450U true CN218827450U (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222002100.0U Active CN218827450U (en) | 2022-07-29 | 2022-07-29 | Battery device, battery pack, and vehicle |
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| CN (1) | CN218827450U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024022479A1 (en) * | 2022-07-29 | 2024-02-01 | 比亚迪股份有限公司 | Heat exchanger, battery pack, and vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024022479A1 (en) * | 2022-07-29 | 2024-02-01 | 比亚迪股份有限公司 | Heat exchanger, battery pack, and vehicle |
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