Temperature control device, battery assembly and electric equipment

Abstract

The invention relates to a heat exchange device, a battery assembly and electric equipment. The heat exchange device comprises a connecting pipe and a plurality of heat exchange units, the multiple heat exchange units are arranged at intervals in the first direction, the space between every two adjacent heat exchange units is suitable for containing a battery cell, and the heat exchange units are suitable for exchanging heat with the battery cells; the heat exchange unit is provided with a containing cavity, and the containing cavity is suitable for containing a heat exchange medium; the containing cavities of every two adjacent heat exchange units communicate with each other through the corresponding connecting pipe. The connecting pipes can elastically stretch out and draw back in the first direction so that the distance between every two adjacent heat exchange units can be adjusted. In the first direction, the battery cell is arranged between the two adjacent heat exchange units, and the temperature control device can exchange heat with the battery cell from the two sides of the battery cell, so that the heat exchange effect with the battery cell is improved, and therefore, when the temperature control device is used for cooling the battery cell, the cooling effect on the battery cell can be improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of batteries, and in particular relates to a temperature control device, a battery assembly and electrical equipment. Background Art

[0002] Lithium batteries can be divided into four categories: liquid, semi-solid, quasi-solid and all-solid. All-solid batteries are the development direction of the next generation of batteries, but solid-state battery technology is difficult. Currently, mainstream manufacturers mainly intervene in the mass production of solid-state batteries in the form of semi-solid and quasi-solid batteries, and semi-solid and quasi-solid batteries will be transitional products from liquid batteries to solid-state batteries for a long time.

[0003] Semi-solid and quasi-solid-state batteries have less electrolyte and greater internal resistance to electron flow, which results in greater heat generation during high-current charging and discharging. To ensure their service life and safety, the battery cells need to be cooled through corresponding temperature control devices.

[0004] However, in the prior art, the temperature control device has limited cooling capacity for the battery cell and it is difficult to meet the heat dissipation requirements. Summary of the invention

[0005] The technical problem to be solved by the present invention is: in the prior art, the temperature control device has limited cooling capacity for battery cells, and provides a temperature control device, a battery assembly and an electrical device.

[0006] In order to solve the above problems, on the one hand, the present invention provides a temperature control device, including a connecting pipe and a plurality of heat exchange units; the plurality of heat exchange units are arranged at intervals along a first direction, and the space between two adjacent heat exchange units is suitable for placing battery cells, and the heat exchange units are suitable for exchanging heat with the battery cells; the heat exchange units have a accommodating cavity, and the accommodating cavity is suitable for accommodating a heat exchange medium; the accommodating cavities of two adjacent heat exchange units are connected through the connecting pipe; the connecting pipe can elastically expand and contract along the first direction to be able to adjust the distance between two adjacent heat exchange units.

[0007] Optionally, the connecting tube extends along the first direction; in the first direction, at least a portion of the connecting tube is a bellows, so that the connecting tube can elastically expand and contract in the first direction.

[0008] Optionally, in the first direction, the heat exchange unit includes a first plate and a second plate arranged in sequence; in the first direction, the second plate has a first surface close to the first plate; a groove is provided on the first surface; the first plate is connected to the first surface and closes the opening of the groove on the first surface to form the accommodating cavity.

[0009] Optionally, in the first direction, a first limiting boss is provided on the surface of the first plate close to the second plate, and the first limiting boss is located in the groove; the first limiting boss is spaced apart from the bottom surface of the groove, and is spaced apart from the side surface of the groove; and / or, a second limiting boss is provided on the bottom surface of the groove, and the second limiting boss is spaced apart from the first plate, and is spaced apart from the side surface of the groove.

[0010] Optionally, in the first direction, the second plate also has a second surface facing away from the first plate; the second plate is used to form an area of ​​the groove, and a protrusion is formed on the second surface; the heat exchange unit also includes a third plate, which is connected to the side of the second plate facing away from the first plate and covers the protrusion in the first direction.

[0011] Optionally, in the first direction, the thickness of the first limiting boss is a, the distance between the bottom surface of the groove and the first plate is A, and the maximum unidirectional expansion allowed of the battery cell in the first direction is D, wherein 1 / 5A≤a<A; A≥2D; and / or, in the second direction, the width of the groove is B, the width of the first limiting boss is b, 0.25B≤b<B; and / or, in the first direction, the thickness of the first plate is h1, the thickness of the second plate is h2, and the thickness of the third plate is h3, h2>h1, h2>h3, 0.8h1≤h3≤1.2h1; and / or, in the second direction, the protrusion has a first side surface and a second side surface arranged opposite to each other, the first side surface and the second side surface both intersect at the second surface, the angle between the first side surface and the second surface is θ1, the angle between the second side surface and the second surface is θ2, 90°<θ1≤165°, 90°<θ2≤165°.

[0012] Optionally, the heat exchange unit further has an input hole and an output hole, both of which penetrate from the outer surface of the heat exchange unit to communicate with the accommodating cavity; along the first direction, the accommodating cavities of each heat exchange unit are connected in series in sequence; in two adjacent heat exchange units, the input hole of one heat exchange unit is connected with the output hole of the other heat exchange unit through the connecting pipe; in the first direction, the input hole of one of the two outermost heat exchange units is connected with the output end of the medium supply device, and the output hole of the other of the two outermost heat exchange units is connected with the reflux end of the medium supply device.

[0013] In order to solve the above problems, on the other hand, the present invention provides a battery assembly, including at least one battery cell group and at least one temperature control device as described above; the battery cell group includes at least one battery cell, and the battery cell is arranged between two adjacent heat exchange units; when there are multiple temperature control devices, the fluid channels of each temperature control device are arranged in parallel; the fluid channel includes a pipeline of the accommodating cavity and the connecting pipe.

[0014] Optionally, the first direction is the direction in which the positive electrode sheets of the battery cells and the negative electrode sheets of the battery cells are alternately stacked in sequence; and / or, in the first direction, the battery cells and the heat exchange units are alternately arranged in sequence; the battery cells and the heat exchange units are stacked together.

[0015] Optionally, the battery assembly further includes a heat exchange plate, which can perform heat exchange with the battery cells; the battery cells and the heat exchange plate are arranged sequentially in a second direction, wherein the second direction intersects with the first direction; the heat exchange plate has a flow channel, which is used to allow fluid to pass into the heat exchange plate and to discharge the fluid in the heat exchange plate; the flow channel is connected in parallel with the fluid channel.

[0016] Optionally, the battery assembly further includes an isolation strip and thermally conductive adhesive; the isolation strip is disposed between the battery cell and the heat exchange plate to separate the battery cell from the heat exchange plate; and the thermally conductive adhesive is filled between the battery cell and the heat exchange plate.

[0017] Optionally, the maximum elongation of the connecting tube in the first direction is L, and the maximum unidirectional expansion allowed for the battery cell in the first direction is D, wherein L≥2D.

[0018] In order to solve the above problems, on the other hand, the present invention provides an electrical device, comprising the battery assembly described in any one of the above items.

[0019] In the heat exchange device, battery assembly and electrical equipment provided in the embodiments of the present invention, in a first direction, the battery cell is arranged between two adjacent heat exchange units, and the temperature control device can exchange heat with the battery cell from both sides of the battery cell, thereby improving the heat exchange effect with the battery cell. Therefore, when the temperature control device of this embodiment is used to cool the battery cell, the cooling effect of the battery cell can be improved.

[0020] In addition, when the temperature of the battery cell changes, it will expand or contract in the first direction. In this embodiment, the connecting tube is configured to be able to elastically expand and contract in the first direction, so that the distance between two adjacent heat exchange units is adjustable. In this way, the gap between two adjacent heat exchange units can better adapt to the expansion or contraction of the battery cell installed therein. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is an exploded view of a battery assembly provided by an embodiment of the present invention; Figure 2 It is a schematic diagram of the cooperation between the temperature control device and the pipeline module provided by one embodiment of the present invention; Figure 3 Schematic diagram of the cooperation between the temperature control device and the battery cell provided by an embodiment of the present invention Figure 1 ; Figure 4 Schematic diagram of the cooperation between the temperature control device and the battery cell provided by an embodiment of the present invention Figure 2 ; Figure 5 is a schematic structural diagram of a temperature control device provided by an embodiment of the present invention; Figure 6 is an exploded diagram of a heat exchange unit provided by an embodiment of the present invention; Figure 7 is a cross-sectional view of a heat exchange unit provided in one embodiment of the present invention; Figure 8 is a cross-sectional view of a heat exchange unit provided in another embodiment of the present invention; Fig. 9 is a front view of a second plate of a heat exchange unit provided by another embodiment of the present invention; Fig.10 is a structural schematic diagram of a pipeline module provided by an embodiment of the present invention; Fig.11 is a schematic structural diagram of an output pipe assembly provided by an embodiment of the present invention; Fig.12 It is a schematic structural diagram of a return pipe assembly provided in one embodiment of the present invention.

[0022] The reference numerals in the specification are as follows: 100. battery assembly; 10. battery cell; 20. temperature control device; 30. heat exchange plate; 40. isolation strip; 50. thermal conductive adhesive; 60. outer frame; 70. first cover plate; 80. second cover plate; 90. battery management system; 1. Connecting pipe; 2. heat exchange unit; 21. accommodating cavity; 22. first plate; 221. first perforation; 23. second plate; 231. first surface; 232. groove; 233. second surface; 234. protrusion; 235. second perforation; 236. top surface; 237. first side surface; 238. second side surface; 239. first groove; 240. second groove; 24. third plate; 241. third perforation; 25. first tube; 26. second tube; 27. first limiting boss; 28. second limiting boss; 3. Clamp; 601, first installation space; 602, second installation space; 41. first frame; 42. second frame; 43. third frame; 44. fourth frame; 45. first partition plate; 46. second partition plate; 47. fifth frame; 48. sixth frame; 49. seventh frame; 5. Isolation plate; 51. Plate body; 52. Limit block; 6. Pipeline module; 61. Output pipe assembly; 611. First joint; 612. Second joint; 613. Third joint; 614. First output pipe; 615. Second output pipe; 616. Third output pipe; 617. Fourth output pipe; 618. Fifth output pipe; 619. Sixth output pipe; 62. Return pipe assembly; 621. Fourth joint; 622. Fifth joint; 623. Sixth joint; 624. First return pipe; 625. Second return pipe; 626. Third return pipe; 627. Fourth return pipe; 628. Fifth return pipe; 629. Sixth return pipe; 63. Quick connector. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] like Figures 1 to 4 As shown, in one embodiment, the battery assembly 100 includes a battery cell 10 and a temperature control device 20 ; the temperature control device 20 is used to perform heat exchange with the battery cell 10 so as to control the temperature of the battery cell 10 .

[0025] like Figure 5 As shown, in one embodiment, the temperature control device 20 includes a connecting pipe 1 and a plurality of heat exchange units 2; the plurality of heat exchange units 2 are arranged in sequence along the first direction, and the space between two adjacent heat exchange units 2 is suitable for placing the battery cell 10, and the heat exchange unit 2 is suitable for exchanging heat with the battery cell 10 (i.e., performing heat exchange); the heat exchange unit 2 has a receiving cavity 21, and the receiving cavity 21 is suitable for receiving a heat exchange medium; the receiving cavities 21 of two adjacent heat exchange units 2 are connected through the connecting pipe 1; the connecting pipe 1 can be elastically retracted along the first direction to adjust the distance between two adjacent heat exchange units 2. "Multiple" means greater than or equal to two, and the term "multiple" has the same meaning in each embodiment, which will not be repeated in the following text.

[0026] exist Figures 1 to 5 In the example shown, the first direction is parallel to the X-axis.

[0027] In this embodiment, in the first direction, the battery cell 10 is arranged between two adjacent heat exchange units 2, and the temperature control device 20 can perform heat exchange with the battery cell 10 from both sides of the battery cell 10, thereby improving the heat exchange effect with the battery cell 10. Therefore, when the temperature control device 20 of this embodiment is used to cool the battery cell 10, the cooling effect of the battery cell 10 can be improved. In addition, when the temperature of the battery cell 10 changes, it will expand or contract in the first direction, and in this embodiment, the connecting pipe 1 is arranged to be elastically retractable in the first direction, so that the distance between the two adjacent heat exchange units 2 is adjustable, so that the gap between the two adjacent heat exchange units 2 can better adapt to the expansion or contraction of the battery cell 10 installed therein.

[0028] Among them, the material of the connecting tube 1 can be rubber, etc., and "the connecting tube 1 can be elastically stretched" can mean: after the connecting tube 1 is stretched, if the tension disappears, the connecting tube 1 can be restored to its original length; and after the connecting tube 1 is compressed, if the pressure disappears, the connecting tube 1 can also be restored to its original length.

[0029] In addition, initially, the connecting tube 1 is in a natural state or in a stretched state; when the temperature of the battery cell 10 rises, it will expand, so that the battery cell 10 will squeeze the heat exchange units 2 on both sides thereof, causing the connecting tube 1 to be stretched, so that the distance between the two heat exchange units 2 connected to the connecting tube 1 will increase; when the temperature of the battery cell 10 drops, it will shrink. At this time, the heat exchange units 2 on both sides of the battery cell 10 will not be subjected to the pressure of the battery cell 10, so that the connecting tube 1 will not be subjected to the pressure of the battery cell 10, so that the connecting tube 1 will shrink, thereby driving the two heat exchange units 2 connected thereto to approach each other, thereby reducing the distance between the two heat exchange units 2.

[0030] In addition, in actual application scenarios, the heat exchange unit 2 can be used to heat the battery core 10, or can be used to cool the battery core 10. The heat exchange medium can be liquid or gas, etc.

[0031] It should be understood that when the number of heat exchange units 2 in the temperature control device 20 is greater than or equal to three, the number of connecting pipes 1 is also multiple. For the same temperature control device 20, the number of connecting pipes 1 it has can be one less than the number of heat exchange units 2 it has.

[0032] In one embodiment, the maximum elongation of the connecting tube 1 in the first direction is L, and the maximum unidirectional expansion allowed by the battery cell 10 in the first direction is D, where L≥2D. In addition, the maximum elongation of the connecting tube 1 in the first direction means that when a force is applied to the connecting tube 1 so that the elongation of the connecting tube 1 in the first direction is less than or equal to L, the connecting tube 1 can be restored to its initial state after the force applied to the connecting tube 1 is removed; however, when the elongation of the connecting tube 1 in the first direction is greater than L, the connecting tube 1 is damaged, and at this time, the connecting tube 1 cannot automatically return to its initial state after the force applied to the connecting tube 1 is removed.

[0033] In one embodiment, the connecting pipe 1 extends along the first direction, wherein the connecting pipe 1 can be a straight pipe, and the axis of the connecting pipe 1 is parallel to the first direction. The two ends of the connecting pipe 1 are respectively connected to the corresponding heat exchange units 2, and the connecting pipe 1 has a certain strength, and it will not bend and deform along its own radial direction due to its own gravity. After the connecting pipe 1 is assembled with the heat exchange unit 2, the connecting pipe 1 can also maintain a straight pipe state, so that the two adjacent heat exchange units 2 cannot generate relative movement in the radial direction of the connecting pipe 1.

[0034] In one embodiment, in the first direction, at least a portion of the connecting tube 1 is a bellows, so that the connecting tube 1 can be extended and retracted in the first direction. The bellows can be extended and retracted in the first direction, thereby realizing the extension and retraction of the connecting tube 1 in the first direction, so that the connecting tube 1 has better extension and retraction performance in the first direction.

[0035] In one embodiment, two adjacent heat exchange units 2 are respectively a first heat exchange unit and a second heat exchange unit; along the first direction, the connecting pipe 1 includes a first section pipe, a second section pipe and a third section pipe which are connected in sequence, the first section pipe is connected to the first heat exchange unit, the third section pipe is connected to the second heat exchange unit, and the second section pipe is a corrugated pipe, so that the second section pipe can be extended and retracted in the first direction. The second section pipe can be extended and retracted in the first direction, thereby realizing the extension and retraction of the connecting pipe 1 in the first direction. In addition, the first section pipe and the third section pipe can be arranged in a non-corrugated pipe type to facilitate connection with the heat exchange unit 2.

[0036] In one embodiment, the heat exchange unit 2 further has an input hole and an output hole, both of which are penetrated from the outer surface of the heat exchange unit 2 to communicate with the accommodating cavity 21; along the first direction, the accommodating cavities 21 of each heat exchange unit 2 are connected in series in sequence; in two adjacent heat exchange units 2, the input hole of one heat exchange unit 2 is connected to the output hole of the other heat exchange unit 2 through a connecting pipe 1; in the first direction, the input hole of one of the two outermost heat exchange units 2 is connected to the output end of the medium supply device, and the output hole of the other of the two outermost heat exchange units 2 is connected to the reflux end of the medium supply device.

[0037] During operation, the heat exchange medium in the medium supply device can flow out from its output end, flow through each heat exchange unit 2 in sequence, and finally flow back into the medium supply device from its return end. This arrangement can circulate fresh heat exchange medium into the temperature control device 20, and can improve the heat exchange effect between the temperature control device 20 and the battery cell 10. That is, the accommodating cavities 21 of each heat exchange unit 2 are connected through each connecting pipe 1 to form a fluid channel, and the medium supply device can pass the medium into the fluid channel and can receive and recover the medium flowing out of the fluid channel.

[0038] When the heat exchange medium is liquid, the medium supply device may include a water pump and a water tank, wherein the heat exchange medium is stored in the water tank, the output end may be the output port of the water pump, and the return end may be a hole on the water tank or a corresponding pipe connected to the inside of the water tank. Subsequently, the fluid in the temperature control device 20 (i.e., in the fluid channel) will flow back to the water tank from the hole or the pipe.

[0039] In one embodiment, the two outermost heat exchange units 2 in the first direction are defined as unit A and unit B, and each heat exchange unit 2 between unit A and unit B is unit C. In the first direction, the input hole and the output hole of unit A and unit C are respectively located on both sides of the heat exchange unit 2, and the input hole and the output hole of unit B are located on the same side of the heat exchange unit 2. This arrangement is more conducive to connection with the medium supply device.

[0040] like Figure 6 and Figure 7 As shown, in one embodiment, in a first direction, the heat exchange unit 2 includes a first plate 22 and a second plate 23 arranged in sequence; in the first direction, the second plate 23 has a first surface 231 close to the first plate 22; a groove 232 is provided on the first surface 231; the first plate 22 is connected to the first surface 231 and closes the opening of the groove 232 on the first surface 231 to form a accommodating cavity 21.

[0041] In one embodiment, the surface of the first plate 22 close to the second plate 23 overlaps with the first surface 231. The first surface 231 is a plane, and the surface of the first plate 22 close to the second plate 23 is also a plane. Alternatively, the surface of the first plate 22 close to the second plate 23 and the first surface 231 may both be arc-shaped surfaces, etc. like Figure 7 As shown, in one embodiment, in the first direction, the second plate 23 also has a second surface 233 facing away from the first plate 22; the second plate 23 is used to form an area of ​​the groove 232, and a protrusion 234 is formed on the second surface 233; the heat exchange unit 2 also includes a third plate 24, the third plate 24 is connected to the side of the second plate 23 facing away from the first plate 22, and covers the protrusion 234 in the first direction.

[0042] The second plate 23 may be a stamped plate, and while the groove 232 is formed on the first surface 231 , a protrusion 234 is formed on the second surface 233 , so that the area of ​​the second plate 23 used to form the groove 232 can form a protrusion 234 on the second surface 233 .

[0043] The third plate 24 covering the protrusion 234 in the first direction may mean that: in an orthographic projection of a plane perpendicular to the first direction (the plane is defined as the first plane), the projection of the third plate 24 and the projection of the protrusion 234 at least partially overlap.

[0044] In the first direction, the third plate 24 may completely cover the protrusion 234 , or the third plate 24 may partially cover the protrusion 234 .

[0045] When the third plate 24 completely covers the protrusion 234 , the orthographic projection of the third plate 24 on the first plane completely covers the orthographic projection of the protrusion 234 on the first plane.

[0046] When the third plate 24 partially covers the protrusion 234 , the orthographic projection of the third plate 24 on the first plane partially covers the orthographic projection of the protrusion 234 on the first plane.

[0047] In one embodiment, in the orthographic projection on the first plane, the projection of the third plate 24 completely covers the projection of the second plate 23 .

[0048] In addition, when in use, the surface of the first plate 22 facing away from the second plate 23 and the surface of the third plate 24 facing away from the second plate 23 can be in contact with the battery cell 10 (i.e., overlap with the outer surface of the battery cell 10), which is conducive to achieving uniform heating or cooling of various regions of the battery cell 10, and effectively avoiding damage to the battery cell 10 due to different temperatures in various regions.

[0049] In one embodiment, the surface of the first plate 22 facing away from the second plate 23 is a plane, the surface of the third plate 24 facing away from the second plate 23 is a plane, and the surface of the battery cell 10 that is used to contact these two surfaces is also a plane, which is more conducive to the first plate 22 and the third plate 24 fitting the battery cell 10.

[0050] like Figure 5 As shown, in one embodiment, for unit A and unit C, the heat exchange unit 2 also includes a first tube 25 and a second tube 26, a first through hole 221 is provided on the first plate 22, a second through hole 235 is provided on the second plate 23, and a third through hole 241 is provided on the third plate 24; wherein, in the first direction, the first through hole 221 penetrates the first plate 22, the second through hole 235 penetrates the second plate 23 from the bottom surface of the groove 232, and the third through hole 241 penetrates the third plate 24.

[0051] The first tube 25 is connected to the first plate 22 and communicates with the first through hole 221; the second tube 26 is connected to the third plate 24 and communicates with the third through hole 241. After assembly, the first through hole 221 communicates with the groove 232, and the second through hole 235 communicates with the third through hole 241, so that the first tube 25 and the second tube 26 are both communicated with the groove 232.

[0052] The first tube 25 and the first through hole 221 are connected to form an output hole, and the second tube 26, the third through hole 241 and the second through hole 235 are connected to form an input hole. After assembly, the connecting tube 1 can be sleeved on the first tube 25 of the first heat exchange unit, and sleeved on the second tube 26 of the second heat exchange unit. In addition, the connecting tube 1 can be locked on the first tube 25 by the clamp 3, and at the same time, the connecting tube 1 can be locked on the second tube 26 by the clamp 3.

[0053] For unit B, the heat exchange unit 2 also includes a first tube 25 and a second tube 26. However, in addition to the first through hole 221, the first plate 22 is also provided with a fourth through hole, which penetrates the first plate 22 in the first direction, and the first through hole 221 and the fourth through hole are arranged at intervals. At this time, the second through hole 235 is not arranged on the second plate 23, and the third through hole 241 is not arranged on the third plate 24. The first tube 25 and the second tube 26 are both arranged on the first plate 22 and are located on the surface of the first plate 22 away from the second plate 23. The first tube 25 is connected to the first through hole 221, and the second tube 26 is connected to the fourth through hole. The first through hole 221 and the fourth through hole are both connected to the groove 232.

[0054] In one embodiment, the first plate 22 and the third plate 24 can both be flat plate structures. In the first direction, the surface of the first plate 22 close to the third plate 24 and the surface of the first plate 22 facing away from the third plate 24 can both be planes, the surface of the third plate 24 close to the first plate 22 and the surface of the third plate 24 facing away from the first plate 22 can both be planes, and the first surface 231 and the second surface 233 can also be planes.

[0055] like Figure 7 As shown, in one embodiment, in the first direction, a first limiting boss 27 is provided on the surface of the first plate 22 close to the second plate 23, and the first limiting boss 27 is located in the groove 232; the first limiting boss 27 is spaced apart from the bottom surface of the groove 232, and is spaced apart from the side surface of the groove 232.

[0056] When the battery cell 10 expands, it will squeeze the second plate 23, which may cause the bottom surface of the groove 232 to contact the first plate 22, thereby blocking and isolating the accommodating cavity 21. This situation can be effectively avoided by setting the first limiting boss 27. In addition, when the battery cell 10 expands, it will squeeze the protrusion 234, so that the bottom surface of the groove 232 is close to the first plate 22. When the bottom surface of the groove 232 contacts the first limiting boss 27, the expansion of the battery cell 10 in the first direction can be blocked.

[0057] In one embodiment, the first limiting boss 27 may be a rectangular block or a spherical segment structure. Preferably, the first limiting boss 27 is a spherical segment structure, and the top surface 236 of the spherical segment structure is connected to the first plate 22, so as to reduce the obstruction to the flow of the fluid in the accommodating chamber 21. Of course, in other embodiments, the first limiting boss 27 may also be a regular structure such as a trapezoidal block, or the first limiting boss 27 may also be an irregular structure, which is not limited in this embodiment.

[0058] In other embodiments, other methods may be used to prevent the accommodation chamber 21 from being blocked or partitioned, for example, Figure 8 and Fig. 9 , a second limiting boss 28 is provided on the bottom surface of the groove 232, and the second limiting boss 28 is spaced apart from the first plate 22 and spaced apart from the side surface of the groove 232. Of course, in other embodiments, while the first limiting boss 27 is provided on the first plate 22, a second limiting boss 28 may also be provided on the bottom surface of the groove 232. In the first direction, the first limiting boss 27 and the second limiting boss 28 are spaced apart.

[0059] like Figure 7 As shown, in one embodiment, in the first direction, the thickness of the first limiting boss 27 is a, and the distance between the bottom surface of the groove 232 and the first plate 22 is A, wherein 1 / 5A≤a<A; preferably, 1 / 3A≤a≤1 / 2A. This can ensure that the fluid flows smoothly in the groove 232 and can well limit the expansion of the battery cell 10. In addition, A≥2D.

[0060] a may refer to: the maximum thickness of the first limiting boss 27 in the first direction.

[0061] A may refer to a minimum distance between the bottom surface of the groove 232 and the first plate 22 in the first direction.

[0062] like Figure 7As shown, in one embodiment, in the second direction, the width of the groove 232 is B, the width of the first limiting boss 27 is b, 0.25B≤b<B, so that the fluid can flow smoothly in the groove 232. The second direction intersects with the first direction, wherein the second direction may be perpendicular to the first direction. When the temperature control device 20 is applied to a vehicle, the first direction is the front-to-back direction of the vehicle, and the second direction is the height direction of the vehicle. Figures 1 to 5 In the example shown, the second direction is parallel to the Z axis.

[0063] b may refer to: the maximum width of the first limiting boss 27 in the second direction.

[0064] B may refer to a minimum width of the groove 232 in the second direction.

[0065] like Figure 7 As shown, in one embodiment, in the first direction, the thickness of the first plate 22 is h1, the thickness of the second plate 23 is h2, and the thickness of the third plate 24 is h3, h2>h1, h2>h3, 0.8h1≤h3≤1.2h1. The thickness of the second plate 23 refers to the distance between the first surface 231 and the second surface 233 in the first direction.

[0066] like Figure 7 As shown, in one embodiment, the protrusion 234 has a top surface 236, a first side surface 237 and a second side surface 238, wherein in the second direction, the first side surface 237 and the second side surface 238 are two opposite surfaces of the protrusion 234, the first side surface 237 and the second side surface 238 are respectively located on both sides of the top surface 236, the first side surface 237 and the second side surface 238 both intersect at the second surface 233, the angle between the first side surface 237 and the second surface 233 is θ1, the angle between the second side surface 238 and the second surface 233 is θ2, 90°<θ1≤165°, 90°<θ2≤165°; preferably, θ1=θ2, and 120°≤θ1≤150°.

[0067] In addition, the top surface 236 is parallel to the bottom surface of the groove 232 and the second surface 233 , the first side surface 237 intersects the second surface 233 and the top surface 236 , and the second side surface 238 intersects the second surface 233 and the top surface 236 .

[0068] like Fig. 9As shown, in one embodiment, the groove 232 is a bent structure, wherein the groove 232 includes a first groove 239 and a second groove 240; the first groove 239 extends along the third direction, and the number of the first grooves 239 is multiple, and each first groove 239 is sequentially spaced along the second direction. The second groove 240 extends along the second direction, and the second groove 240 is used to connect two adjacent first grooves 239. The third direction, the second direction and the first direction intersect each other, and preferably, the third direction, the second direction and the first direction are perpendicular to each other. In this case, the third direction can be the width direction of the vehicle. Figures 1 to 5 In the example shown, the third direction is parallel to the Y-axis.

[0069] In addition, in the second direction, both ends of two adjacent first grooves 239 may be connected through a second groove 240. In addition, in the third direction, the second groove 240 is located on one side of the first groove 239 it is connected to.

[0070] In one embodiment, the first direction is the direction in which the positive electrode sheets of the battery cell 10 and the negative electrode sheets of the battery cell 10 are alternately stacked and arranged in sequence. The thickness direction of the positive electrode sheets and the negative electrode sheets is the first direction, and the thickness direction of the positive electrode sheets is the thickness direction of the battery cell 10. In actual products, the positive electrode sheets and the negative electrode sheets are both thin sheet structures, so the two outer surfaces of the battery cell 10 in the first direction are large surfaces of the battery cell 10, which can improve the heat exchange effect between the temperature control component and the battery cell 10.

[0071] In addition, the battery cell 10 may be a rectangular structure, and the battery cell 10 has a first outer surface, a second outer surface, a third outer surface, a fourth outer surface, a fifth outer surface, and a sixth outer surface, and these six outer surfaces may all be planes. Among them, the first outer surface and the second outer surface are parallel and spaced apart, the third outer surface and the fourth outer surface are parallel and spaced apart, the fifth outer surface and the sixth outer surface are parallel and spaced apart, the first outer surface and the second outer surface both intersect at the third outer surface, the fourth outer surface, the fifth surface, and the sixth outer surface, and in addition, the third outer surface and the fourth outer surface both intersect at the fifth outer surface and the sixth outer surface.

[0072] The first outer surface and the second outer surface are arranged at intervals along the first direction, the areas of the first outer surface and the second outer surface are the same, the areas of the third outer surface and the fourth outer surface are the same, the areas of the fifth surface and the sixth outer surface are the same, the area of ​​the first outer surface is larger than the area of ​​the third outer surface, and the area of ​​the first outer surface is larger than the area of ​​the fifth outer surface, and the first outer surface and the second outer surface are the large surfaces of the battery cell 10.

[0073] In one embodiment, the battery core 10 and the heat exchange unit 2 are stacked together, and in the first direction, the battery core 10 and the heat exchange unit 2 are arranged alternately in sequence. That is, a battery core 10 is arranged between two adjacent heat exchange units 2, and the battery core 10 is stacked with the two heat exchange units 2 on both sides thereof. In this way, the heat exchange effect between the temperature control device 20 and the battery core 10 can be further improved.

[0074] After the battery assembly 100 is assembled, the surface of the heat exchange unit 2 close to the battery cell 10 overlaps with the surface of the battery cell 10 close to the heat exchange unit 2, which is conducive to increasing the heat exchange effect between the two. Specifically, the surface of the heat exchange unit 2 close to the battery cell 10 is a plane, and the surface of the battery cell 10 close to the heat exchange unit 2 is also a plane. For example, the surface of the first plate 22 facing away from the third plate 24 and the surface of the third plate 24 facing away from the first plate 22 are both planes. After assembly, the surface of the first plate 22 close to the third plate 24 (or the surface of the third plate 24 close to the first plate 22) can overlap with the first outer surface (or the second outer surface) of a battery cell 10.

[0075] like Figure 1 and Figure 2 As shown, in one embodiment, the battery assembly 100 further includes a heat exchange plate 30, which can exchange heat with the battery cell 10; the battery cell 10 and the heat exchange plate 30 are arranged in sequence in the second direction. This arrangement can further improve the effect of heat exchange between the battery cell 10 and the outside. The second direction can be the height direction of the battery cell 10.

[0076] In one embodiment, the heat exchange plate 30 has a corresponding flow channel, which is used to allow external fluid to pass into the flow channel (i.e., into the heat exchange plate 30) and to discharge the heat exchange plate 30, i.e., the external fluid can pass through the heat exchange plate 30 from the flow channel. The flow channel of the heat exchange plate 30 is connected in parallel with the fluid channel of the temperature control device 20.

[0077] like Figure 2 As shown, in one embodiment, the battery assembly 100 also includes an isolation strip 40 and a thermally conductive adhesive 50; the isolation strip 40 is disposed between the battery cell 10 and the heat exchange plate 30 to separate the battery cell 10 from the heat exchange plate 30; the thermally conductive adhesive 50 is filled between the battery cell 10 and the heat exchange plate 30.

[0078] The battery cell 10 and the heat exchange plate 30 are separated by the isolation strip 40 , so as to prevent the battery cell 10 from squeezing the thermal conductive adhesive 50 , and facilitate filling the thermal conductive adhesive 50 between the battery cell 10 and the heat exchange plate 30 .

[0079] In addition, the isolation strip 40 is also located between the temperature control device 20 and the heat exchange plate 30 to separate the temperature control device 20 from the heat exchange plate 30, so as to prevent the temperature control device 20 from squeezing the thermal conductive adhesive 50 and facilitate filling the thermal conductive adhesive 50 between the battery cell 10 and the heat exchange plate 30. Specifically, the isolation strip 40 is actually arranged between the heat exchange unit 2 and the heat exchange plate 30.

[0080] In one embodiment, the number of the isolation bars 40 may be two, and the two isolation bars 40 are spaced apart along a third direction, and both ends of the battery cell 10 are respectively placed on the two isolation bars 40 , and the third direction may be the length direction of the battery cell 10 .

[0081] In actual products, the battery cells 10 may form a battery cell group, wherein one battery cell group includes at least one battery cell 10, and one battery assembly 100 may include at least one battery cell group. Each battery cell 10 in a battery cell group may be separated from the heat exchange plate 30 by the two isolation bars 40. Heat exchange units 2 are provided on both sides of each battery cell 10 in a battery cell group, and both are in contact with the two heat exchange units 2.

[0082] In addition, the number of temperature control devices 20 included in a battery assembly 100 may also be at least one. Among them, a battery cell group cooperates with a temperature control device 20 to form a battery module. Specifically, each battery cell 10 in a battery cell group is located between the corresponding heat exchange units 2 in the same temperature control device 20. Specifically, in a temperature control device 20, there is an installation cavity between two adjacent heat exchange units 2, and one battery cell 10 is arranged in one installation cavity. When only one battery cell 10 is arranged between two adjacent heat exchange units 2, the number of heat exchange units 2 in a temperature control device 20 can be one more than the number of battery cells 10 in the battery cell group that cooperates with it.

[0083] When a battery assembly 100 includes a plurality of temperature control devices 20, the fluid channels of the temperature control devices 20 may be arranged in parallel, and the fluid channel of a temperature control device 20 includes the accommodating chamber 21 in the temperature control device and the pipe of the connecting pipe 1, that is, the pipes of the connecting pipes 1 of the temperature control device 20 and the accommodating chamber 21 of each heat exchange unit 2 together constitute the fluid channel of the temperature control device 20. The connecting pipe 1 connected to the accommodating chamber 21 means that the pipe of the connecting pipe 1 is connected to the accommodating chamber 21.

[0084] In one embodiment, in a battery assembly 100, when the number of temperature control devices 20 and battery cell groups is multiple, one temperature control device 20 corresponds to one battery cell group, and each battery cell 10 in one battery cell group is located between the corresponding heat exchange units 2 in the corresponding temperature control device 20.

[0085] like Figure 1As shown, in one embodiment, the battery assembly 100 further includes an outer frame 60, a first cover plate 70 and a second cover plate 80; the outer frame 60 has a first installation space 601, and the first installation space 601 is a cavity structure with openings at both ends. Specifically, in the second direction, the first installation space 601 runs through the outer frame 60; the first cover plate 70 and the second cover plate 80 are both connected to the outer frame 60, and respectively close the openings at both ends of the first installation space 601. The battery cell 10 and the temperature control device 20 are both installed in the first installation space 601 and are located between the first cover plate 70 and the second cover plate 80. The outer frame 60 can be used to limit the maximum expansion amount of the battery cell 10.

[0086] In addition, the heat exchange plate 30 may be disposed between the battery cell 10 and the first cover plate 70. When the battery assembly 100 is applied to a vehicle, the first cover plate 70 may be located below the second cover plate 80.

[0087] When the battery assembly 100 includes multiple temperature control devices 20 and multiple battery cell groups, the battery assembly 100 also includes a partition plate, which is arranged in the first installation space 601 and is used to divide the first installation space 601 into multiple sub-spaces. One temperature control device 20 and one battery cell group can be installed in one sub-space.

[0088] exist Figure 1 In the example shown, there are two partition plates, which are cross-arranged to divide the first installation space 601 into four sub-spaces.

[0089] like Figure 1 As shown, in one embodiment, the outer frame 60 includes a first frame 41, a second frame 42, a third frame 43 and a fourth frame 44, which enclose a first installation space 601. Specifically, the first frame 41 and the second frame 42 are arranged at intervals, the third frame 43 and the fourth frame 44 are arranged at intervals, the two ends of the first frame 41 are connected to the third frame 43 and the fourth frame 44 respectively, and the two ends of the second frame 42 are connected to the third frame 43 and the fourth frame 44 respectively.

[0090] In addition, the first frame 41 and the second frame 42 are arranged at intervals along the first direction, and the third frame 43 and the fourth frame 44 are arranged at intervals along the third direction. The first frame 41 and the second frame 42 are used to limit the maximum expansion amount of the battery cell 10 in the first direction.

[0091] At this time, the two partition plates are respectively the first partition plate 45 and the second partition plate 46; the two ends of the first partition plate 45 are respectively connected to the first frame 41 and the second frame 42, and the first partition plate 45 is separated from the third frame 43 and the fourth frame 44; the two ends of the second partition plate 46 are respectively connected to the third frame 43 and the fourth frame 44, and the first partition plate 45 is separated from the first frame 41 and the second frame 42.

[0092] like Figure 1 As shown, in one embodiment, the outer frame 60 further has a second installation space 602, wherein the second installation space 602 and the first installation space 601 are arranged at intervals, and in the second direction, the second installation space 602 runs through the outer frame 60. The second installation space 602 is used to accommodate the battery management system 90, and the battery management system 90 is used to control the operation of the battery cell 10.

[0093] like Figure 1 As shown, the second installation space 602 and the first installation space 601 are arranged at intervals in the first direction. Among them, the outer frame 60 also includes a fifth frame 47, a sixth frame 48 and a seventh frame 49, the fifth frame 47 and the sixth frame 48 are arranged at intervals along the third direction, the fifth frame 47 is connected to the third frame 43, the sixth frame 48 is connected to the fourth frame 44, and the two ends of the seventh frame 49 are connected to the fifth frame 47 and the sixth frame 48 respectively. In addition, in the first direction, the fifth frame 47, the sixth frame 48 and the seventh frame 49 are all located on the side of the first frame 41 away from the second frame 42, the seventh frame 49 and the first frame 41 are arranged at intervals along the first direction, and the first frame 41, the fifth frame 47, the sixth frame 48 and the seventh frame 49 enclose and form the second installation space 602.

[0094] After assembly, the first cover plate 70 and the second cover plate 80 also close the openings at both ends of the second installation space 602 in the second direction.

[0095] like Figure 3 and Figure 4 As shown, in one embodiment, the battery assembly 100 further includes an isolation plate 5, which is disposed between the temperature control device 20 and the outer frame 60 to prevent the temperature control device 20 from directly contacting the outer frame 60. There may be two isolation plates 5, and in the first direction, the two isolation plates 5 are located on both sides of the temperature control device 20. In addition, the isolation plate 5 may be an insulating plate.

[0096] like Figure 3 As shown, in one embodiment, the isolation plate 5 includes a plate body 51 and a limit block 52. The limit block 52 is arranged on the plate body 51. After assembly, the plate body 51 is located between the temperature control device 20 and the limit block 52, that is, the limit block 52 is located on the side of the plate body 51 away from the temperature control device 20.

[0097] When assembling the battery assembly 100, the battery cell group and the temperature control device 20 can be assembled together first, and then the two isolation plates 5 are respectively connected to the two sides of the temperature control device 20 to form a battery unit, and then the battery unit is clamped by a manipulator and placed in the first installation space 601. The manipulator can be in contact with the plate body 51 to prevent the manipulator from scratching the outer frame 60.

[0098] In one embodiment, one isolation plate 5 may have a plurality of limit blocks 52 , and the limit blocks 52 are arranged on the plate body 51 at intervals along the third direction and are all located on the same side of the plate body 51 .

[0099] like Figure 2 and Fig.10 As shown, in one embodiment, the battery assembly 100 further includes a pipeline module 6, and the pipeline module 6 is used to connect the fluid channel of the temperature control device 20 and the medium supply device.

[0100] like Fig.10 As shown, the pipeline module 6 includes an output pipe assembly 61 and a return pipe assembly 62. The output pipe assembly 61 is used to connect the output end of the medium supply device and the fluid channel input end of the temperature control device 20, and the return pipe assembly 62 is used to connect the return end of the medium supply device and the fluid channel output end of the temperature control device 20.

[0101] exist Figure 2 In the example shown, the battery assembly 100 has four temperature control devices 20. Fig.11 As shown, the output pipe assembly 61 includes a first joint 611, a second joint 612, a third joint 613, a first output pipe 614, a second output pipe 615, a third output pipe 616 and a fourth output pipe 617; wherein the first joint 611, the second joint 612 and the third joint 613 are all three-way joints; the first joint 611 is respectively connected to one end of the first output pipe 614 and one end of the second output pipe 615, and the fluid passage of the first output pipe 614 is connected in parallel with the fluid passage of the second output pipe 615; the other end of the first output pipe 614 is connected to the second joint 612, so that the fluid passage of the first output pipe 614 is divided into two parallel passages through the second joint 612. The other end of the second output pipe 615 is connected to the third joint 613, and the third joint 613 is respectively connected to the third output pipe 616 and the fourth output pipe 617, so that the passage of the second output pipe 615 is divided into two parallel sub-passages through the third joint 613, and the two sub-passages are the passage of the third output pipe 616 and the passage of the fourth output pipe 617 respectively; in this way, the output pipe assembly 61 can have a passage divided into four parallel sub-passages, and the four passages are respectively connected to the fluid passages of the four temperature control devices 20. When working, the medium supply device can simultaneously pass the fluid into the fluid passages of the four temperature control devices 20 from the first joint 611.

[0102] In addition, if Figure 2 As shown, the output pipe assembly 61 also includes a fifth output pipe 618 and a sixth output pipe 619, and the fifth output pipe 618 and the sixth output pipe 619 are respectively connected to the second joint 612. After the medium in the first output pipe 614 passes through the second joint 612, it flows to the fifth output pipe 618 and the sixth output pipe 619 respectively, and from the fifth output pipe 618 and the sixth output pipe 619 to the corresponding temperature control device 20.

[0103] like Fig.12 As shown, the return pipe assembly 62 includes a fourth joint 621, a fifth joint 622, a sixth joint 623, a first return pipe 624, a second return pipe 625, a third return pipe 626 and a fourth return pipe 627; wherein the fourth joint 621, the fifth joint 622 and the sixth joint 623 are all three-way joints; the fourth joint 621 is respectively connected to one end of the first return pipe 624 and one end of the second return pipe 625, and the fluid passage of the first return pipe 624 is connected in parallel with the fluid passage of the second return pipe 625; the other end of the first return pipe 624 is connected to the fifth joint 622, so that the fluid passage of the first return pipe 624 is divided into two parallel fluid passages through the fifth joint 622. sub-passageways; the other end of the second return pipe 625 is connected to the sixth joint 623, and the sixth joint 623 is respectively connected to the third return pipe 626 and the fourth return pipe 627, so that the passage of the second return pipe 625 is divided into two parallel sub-passageways through the sixth joint 623, and the two sub-passageways are the passage of the third return pipe 626 and the passage of the fourth return pipe 627 respectively; when working, the return pipe assembly 62 can be connected in parallel to one passage by four sub-passageways, and these four sub-passageways are respectively connected to the fluid channels of the four temperature control components, and the medium in each fluid channel can be returned to the fourth joint 621 through the four sub-channels respectively, and returned to the medium supply device from the fourth joint 621.

[0104] In addition, if Figure 2 As shown, the return pipe assembly 62 also includes a fifth return pipe 628 and a sixth return pipe 629, which are respectively connected to the fifth joint 622. The medium in the corresponding temperature control device 20 flows into the fifth return pipe 628 and the sixth return pipe 629 respectively, and then converges into the first return pipe 624 through the fifth joint 622, and then flows back from the first return pipe 624 to the medium supply device.

[0105] like Fig.10 As shown, in one embodiment, the pipeline module 6 further includes a quick-connect plug 63. The quick-connect plug 63 is used to realize the serial connection between different pipes. The quick-connect plug 63 may have a plurality of channels spaced apart from each other, and each channel can realize the serial connection between two pipes.

[0106] The embodiment of the present invention further provides an electric device, which includes the battery assembly 100 described in any one of the above embodiments. The electric device may be a vehicle, an aircraft, etc.

[0107] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0108] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A temperature control device, characterized in that: It includes a connecting pipe and a plurality of heat exchange units; The plurality of heat exchange units are arranged at intervals along a first direction, the space between two adjacent heat exchange units is suitable for placing a battery core, and the heat exchange unit is suitable for exchanging heat with the battery core; The heat exchange unit has a containing cavity, and the containing cavity is suitable for containing a heat exchange medium; The accommodating chambers of two adjacent heat exchange units are connected via the connecting pipe; The connecting pipe can be elastically expanded and contracted along the first direction so as to adjust the distance between two adjacent heat exchange units.

2. The temperature control device according to claim 1, characterized in that: The connecting tube extends along the first direction; in the first direction, at least a portion of the connecting tube is a bellows, so that the connecting tube can elastically expand and contract in the first direction.

3. The temperature control device according to claim 1, characterized in that: In the first direction, the heat exchange unit includes a first plate and a second plate arranged in sequence; In the first direction, the second plate has a first surface close to the first plate; A groove is provided on the first surface; The first plate is connected to the first surface and closes the opening of the groove on the first surface to form the accommodating cavity.

4. The temperature control device according to claim 3, characterized in that: In the first direction, a first limiting boss is provided on the surface of the first plate close to the second plate, and the first limiting boss is located in the groove; the first limiting boss is spaced apart from the bottom surface of the groove and spaced apart from the side surface of the groove; and / or, A second limiting boss is disposed on the bottom surface of the groove, and the second limiting boss is spaced apart from the first plate and spaced apart from the side surface of the groove.

5. The temperature control device according to claim 4, characterized in that: In the first direction, the second plate also has a second surface facing away from the first plate; The second plate is used to form a region of the groove, and a protrusion is formed on the second surface; The heat exchange unit further includes a third plate connected to a side of the second plate facing away from the first plate and covering the protrusion in the first direction.

6. The temperature control device according to claim 5, characterized in that: In the first direction, the thickness of the first limiting boss is a, the distance between the bottom surface of the groove and the first plate is A, and the maximum unidirectional expansion amount allowed for the battery cell in the first direction is D, wherein, 1 / 5A≤a<A;A≥2D;and / or, In the second direction, the width of the groove is B, the width of the first limiting boss is b, 0.25B≤b<B; and / or, In the first direction, the thickness of the first plate is h1, the thickness of the second plate is h2, the thickness of the third plate is h3, h2>h1, h2>h3, 0.8h1≤h3≤1.2h1; and / or, In the second direction, the protrusion has a first side surface and a second side surface arranged opposite to each other, the first side surface and the second side surface both intersect at the second surface, the angle between the first side surface and the second surface is θ1, the angle between the second side surface and the second surface is θ2, 90°<θ1≤165°, 90°<θ2≤165°.

7. The temperature control device according to claim 1, characterized in that: The heat exchange unit further comprises an input hole and an output hole, wherein both the input hole and the output hole penetrate through the outer surface of the heat exchange unit to communicate with the accommodating cavity; Along the first direction, the accommodating chambers of the heat exchange units are connected in series in sequence; Among two adjacent heat exchange units, the input hole of one heat exchange unit is connected with the output hole of the other heat exchange unit through the connecting pipe; In the first direction, the input hole of one of the two outermost heat exchange units is connected to the output end of the medium supply device, and the output hole of the other of the two outermost heat exchange units is connected to the return end of the medium supply device.

8. A battery assembly, characterized in that: Comprising at least one battery cell group and at least one temperature control device according to any one of claims 1 to 7; The battery cell group includes at least one battery cell, and the battery cell is arranged between two adjacent heat exchange units; When there are multiple temperature control devices, the fluid channels of the temperature control devices are arranged in parallel; The fluid channel includes the accommodating chamber and a pipeline of the connecting pipe.

9. The battery assembly according to claim 8, characterized in that: The first direction is the direction in which the positive electrode sheets of the battery cells and the negative electrode sheets of the battery cells are alternately stacked and arranged in sequence and / or, In the first direction, the battery cells and the heat exchange units are arranged alternately in sequence; The battery core and the heat exchange unit are stacked together.

10. The battery assembly according to claim 8, characterized in that: The battery assembly further includes a heat exchange plate, which can perform heat exchange with the battery cell; The battery cells and the heat exchange plates are arranged sequentially in a second direction, wherein the second direction intersects with the first direction; The heat exchange plate has a flow channel, and the flow channel is used to allow the fluid to flow into the heat exchange plate and to discharge the fluid in the heat exchange plate; The flow channel is connected in parallel with the fluid passage.

11. The battery assembly according to claim 10, characterized in that: The battery assembly also includes an isolation strip and a thermally conductive adhesive; The isolation strip is arranged between the battery core and the heat exchange plate to separate the battery core from the heat exchange plate; The thermally conductive adhesive is filled between the battery core and the heat exchange plate.

12. The battery assembly according to claim 8, characterized in that: The maximum elongation of the connecting tube in the first direction is L, and the maximum unidirectional expansion allowed for the battery cell in the first direction is D, wherein L≥2D.

13. An electrical equipment, characterized in that: A battery assembly comprising any one of claims 8 to 12.

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