CN218513537U - Cooling plate, cooling device and battery module - Google Patents

Abstract

The utility model provides a cooling plate, cooling device and battery module relates to power battery technical field, the utility model provides a cooling plate includes: the cooling device comprises a first cooling part, a second cooling part and a third cooling part which are hollow inside, wherein two ends of the first cooling part are respectively communicated with one end of the second cooling part and one end of the third cooling part, and the shapes and/or the extending directions of the second cooling part and the third cooling part are matched with the outer wall of an object to be cooled; the first cooling part, the second cooling part and the third cooling part surround to form a cooling cavity with an opening at the top. The utility model discloses a cooling plate, cooling device and battery module's heat transfer area is great, enables the abundant cooling of battery core, guarantees the homogeneity of battery core temperature.

Description

Cooling plate, cooling device and battery module

Technical Field

The utility model relates to a power battery technical field, concretely relates to cooling plate, cooling device and battery module.

Background

With the rapid increase of electric vehicle manufacturers and the increasing demand for rapid charging technology at home and abroad, the power battery is used as a key component of the electric vehicle, and the guarantee of the performance and the safety of the power battery is particularly important.

The power battery has high requirement on the working temperature, the ideal working temperature is between 10 ℃ and 40 ℃, the power battery can generate a large amount of heat in the charging and discharging process (especially high-rate charging and discharging), so that the temperature of the battery is increased sharply, and particularly when the battery operates in a high-capacity, rapid charging or very severe environment and the heat in the battery cannot be effectively transferred to the outside, the performance and the safety of the battery can be seriously influenced due to the overhigh temperature of the power battery. In order to ensure the working performance of the power battery and enable the battery to be at a proper working temperature, the liquid cooling technology is widely applied to a thermal management system of the power battery at present.

Most of the existing power battery cooling plates are located at the bottom of a power battery, the contact surface between the existing power battery cooling plates and the power battery is small, the heat exchange area is small, the temperature uniformity of the power battery is poor, the cooling rate is low, and the cooling effect on the power battery is poor.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in that battery cooling plate heat transfer area is little among the prior art, heat exchange efficiency is lower, cooling speed is slow, defect that cooling effect is general to it is great to provide a heat transfer area, enables battery core fully cooling, guarantees cooling plate, cooling device and the battery module of the homogeneity of battery core temperature.

In order to solve the above problems, the present invention provides a cooling plate, which comprises a first cooling part, a second cooling part and a third cooling part, wherein the first cooling part, the second cooling part and the third cooling part are hollow inside, two ends of the first cooling part are respectively communicated with one end of the second cooling part and one end of the third cooling part, and the shapes and/or extending directions of the second cooling part and the third cooling part are matched with the outer wall of an object to be cooled; the first cooling part, the second cooling part and the third cooling part surround to form a cooling cavity with an opening at the top.

As a preferable technical solution of the cooling plate, microchannels are provided in each of the first cooling portion, the second cooling portion and the third cooling portion, the microchannels in the first cooling portion, the second cooling portion and the third cooling portion are communicated with each other, and the microchannels may be communicated with a cold source device.

As a preferable embodiment of the cooling plate, the microchannel is provided with a plurality of microchannels, and the plurality of microchannels are arranged in parallel and are uniformly arranged along the length direction of the first cooling part, the second cooling part, and the third cooling part.

As the preferable technical scheme of the cooling plate, the cold source device is a liquid cooling source device.

As a preferable embodiment of the cooling plate, the second cooling portion and the third cooling portion are provided in parallel with each other and perpendicular to the first cooling portion.

A cooling device comprises at least two collecting pipes and at least one group of cooling plates, wherein one ends of a second cooling part and one end of a third cooling part of each cooling plate, which are far away from a first cooling part, are communicated with one collecting pipe.

As a preferred technical solution of the cooling plate, the cooling plate is provided with a plurality of groups and is arranged side by side along the extending direction of the micro-channel in the first cooling portion and/or is arranged side by side along the extending direction perpendicular to the micro-channel in the first cooling portion, and the second cooling portion and the third cooling portion of the cooling plate are communicated with the same collecting pipe along two groups adjacent to the extending direction of the micro-channel in the first cooling portion.

As a preferable technical solution of the cooling plate, the cooling plate further includes a main inlet pipe and a main outlet pipe, the cooling plate is provided with a plurality of groups and is arranged side by side along an extending direction of the micro-channels in the first cooling portion and/or arranged side by side along an extending direction perpendicular to the micro-channels in the first cooling portion, one of the header pipe communicated with the second cooling portion and the header pipe communicated with the third cooling portion is communicated with the main inlet pipe, and the other is communicated with the main outlet pipe.

As a preferred technical scheme of the cooling plate, the collecting pipe is a hollow tubular body with a closable end, an elongated groove is axially formed in the pipe wall of the tubular body, and one ends of the second cooling part and the third cooling part, which are far away from the first cooling part, are communicated with the collecting pipe through the elongated groove.

The utility model provides a battery module, includes at least one battery core and foretell cooling device, the battery core is arranged in the cooling chamber of cooling device's cooling plate, the bottom surface of battery core with the first cooling portion of cooling plate closely laminates, the battery core is close to a set of opposite flanks of two utmost points ears of battery core respectively with the second cooling portion and the third cooling portion of cooling plate closely laminate.

As a preferable configuration of the cooling plate, one end positions of the second cooling portion and the third cooling portion, which are away from the first cooling portion, are higher than the positions of the tabs.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a cooling plate, include: the cooling device comprises a first cooling part, a second cooling part and a third cooling part which are hollow inside, wherein two ends of the first cooling part are respectively communicated with one end of the second cooling part and one end of the third cooling part, and the shapes and/or the extending directions of the second cooling part and the third cooling part are matched with the outer wall of an object to be cooled; the first cooling part, the second cooling part and the third cooling part surround to form a cooling cavity with an opening at the top. Through setting up first cooling portion, second cooling portion and third cooling portion, treat that the cooling object can place in the cooling chamber, first cooling portion, second cooling portion and third cooling portion can surround in three direction and treat the cooling object (like the battery core), have increased the cooling plate and have treated the heat transfer area of cooling the object, have strengthened the heat transfer effect, can guarantee to treat that the cooling object fully cools off, guarantee to treat the homogeneity of cooling object temperature.

2. The utility model provides a cooling plate, the inside microchannel that is provided with many parallels and corresponds the intercommunication of first cooling portion, second cooling portion and third cooling portion can avoid the vortex, guarantees that the coolant velocity of flow is even, reduces the cooling plate surface difference in temperature to the uniformity of waiting to cool off object (like battery core) surface temperature has been ensured to have strengthened.

3. The utility model provides a cooling device, through setting up the multiunit cooling plate, the multiunit cooling plate sets up side by side to through pressure manifold series connection intercommunication or parallelly connected intercommunication. The parallel connection scheme or the series connection scheme can be selected according to the requirements of inlet and outlet pressure drop, for example, an object to be cooled is a battery core body, and when the battery module is large and the battery pack is large, the parallel connection scheme can be used to improve the heat exchange effect.

4. The utility model provides a cooling device, mass flow subassembly are the hollow tubulose body that the tip can be sealed, have seted up the elongated slot along the axial on the tubulose body pipe wall, and elongated slot and pressure manifold intercommunication are passed through to the one end that first cooling portion was kept away from to second cooling portion and third cooling portion. The cooling plate is inserted into the elongated slot and welded and fixed by using an alloy aluminum welding rod, so that the assembly is convenient and the applicability is strong.

5. The utility model provides a battery module, this battery module has adopted the utility model provides a cooling device, wherein the cooling chamber of cooling plate is used for putting into the battery core, the bottom surface and the first cooling portion of battery core closely laminate, two sides about two utmost points ear of being close to the battery core closely laminate with second cooling portion and third cooling portion respectively, because calorific capacity of battery core mainly concentrates on two utmost point ear parts, whole battery core upper portion temperature will be higher than well lower part, battery core upper portion utmost point ear part setting is pressed close to second cooling portion and third cooling portion, the high-efficient heat dissipation of the main portion that generates heat of battery core has been guaranteed, and heat exchange efficiency is improved.

6. The utility model provides a battery module, the one end position that first cooling portion was kept away from to second cooling portion and third cooling portion is higher than the position of battery core utmost point ear, makes second cooling portion and third cooling portion be close to two utmost point ears of battery core more, and increases the cooling route, cools off two better utmost point ear parts, improves the temperature homogeneity and the cooling effect of battery core.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a cooling plate provided in a first embodiment of the present invention;

fig. 2 is an assembly view of a cooling plate and a battery core provided in a first embodiment of the present invention;

FIG. 3 is a schematic view of the structure of micro-channels in a cooling plate according to a first embodiment of the present invention;

fig. 4 is a schematic structural view of a collecting main of a cooling device according to a second embodiment of the present invention;

fig. 5 is an assembly view of a header pipe and a cooling plate of a cooling device according to a second embodiment of the present invention;

fig. 6 is an assembly view of a cooling device provided in a second embodiment of the present invention, in a serial arrangement with a manifold;

fig. 7 is a flow path diagram of a cooling device provided in a second embodiment of the present invention, which is connected in series through a header pipe;

fig. 8 is an assembly view of a cooling apparatus according to a third embodiment of the present invention, in which the cooling apparatus is connected in parallel via a header pipe;

fig. 9 is a flow path diagram of a cooling apparatus according to a third embodiment of the present invention, in which the cooling apparatus is connected in parallel via a header pipe.

Description of reference numerals:

1. a cooling plate; 11. a first cooling section; 12. a second cooling section; 13. a third cooling section; 14. a cooling chamber; 2. a battery core body; 21. a tab; 3. a microchannel; 4. a header pipe; 41. an inlet header pipe; 411. a long groove; 42. an outlet header; 43. a first middle header; 44. a second middle header; 45. a third middle manifold; 51. a manifold inlet pipe; 52. a main outlet pipe.

Detailed Description

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

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

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

Furthermore, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

As shown in fig. 1 and 2, the cooling plate of the present invention is a preferred embodiment. The cooling plate increases the heat exchange area between the cooling plate and an object to be cooled, enhances the heat exchange effect, can ensure that the object to be cooled is fully cooled, and ensures the uniformity of the temperature of the object to be cooled.

The cooling plate of the embodiment comprises a first cooling part 11, a second cooling part 12 and a third cooling part 13 which are hollow inside, two ends of the first cooling part 11 are respectively communicated with one ends of the second cooling part 12 and the third cooling part 13, and the shapes and/or the extending directions of the second cooling part 12 and the third cooling part 13 are matched with the outer wall of an object to be cooled; the first cooling part 11, the second cooling part 12 and the third cooling part 13 surround to form a cooling cavity 14 with an open top.

Above-mentioned cooling plate 1 is through setting up first cooling portion 11, second cooling portion 12 and third cooling portion 13, treats that the cooling object can place in cooling chamber 14, and first cooling portion 11, second cooling portion 12 and third cooling portion 13 can surround in three directions and treat the cooling object (like the battery core), have increased cooling plate 1 and the heat transfer area of treating the cooling object, have strengthened the heat transfer effect, have guaranteed the abundant cooling of treating the cooling object, guarantee to treat the homogeneity of cooling object temperature.

Specifically, the microchannels 3 are disposed in the first cooling part 11, the second cooling part 12 and the third cooling part 13, and the microchannels 3 may communicate with a heat sink device. The micro-channels 3 communicated with the cold source device are arranged in the first cooling part 11, the second cooling part 12 and the third cooling part 13, so that the cold source device can convey the cooling medium to the cooling plate 1 through the micro-channels 3, the circulation of the cooling medium is realized, and the cooling effect of the cooling plate 1 is improved.

As shown in fig. 3, a plurality of microchannels 3 are disposed in each of the first cooling part 11, the second cooling part 12, and the third cooling part 13 and are communicated with each other. Through setting up many microchannels 3, make the coolant liquid distribute more evenly in first cooling portion 11, second cooling portion 12 and the third cooling portion 13 of cooling plate 1, reduce the difference in temperature of each cooling portion of cooling plate 1, can solve the heat dissipation problem of treating the cooling body effectively, be favorable to improving the performance of treating the cooling body and prolong its life.

Further, the plurality of microchannels 3 are arranged in parallel with each other and uniformly in the length direction of the first cooling part 11, the second cooling part 12 and the third cooling part 13. First cooling portion 11, second cooling portion 12 and 13 inside microchannels 3 that are provided with many parallels and correspond the intercommunication of third cooling portion can avoid the vortex, guarantee that the coolant velocity of flow is even, reduce the 1 surperficial difference in temperature of cooling plate, have strengthened treating cooling object surface temperature uniformity.

The cold source device of this embodiment is a liquid cooling device, and the cooling medium that the liquid cooling device carries in to cooling plate 1 can be cooling liquids such as deionized water or aqueous solution. In other embodiments, the cooling device may be an air cooling device or a combination of air cooling and liquid cooling.

Further, the second cooling portion 12 and the third cooling portion 13 are parallel to each other and are both disposed perpendicular to the first cooling portion 11. The object of treating of this embodiment is cuboid shape's battery core 2, and battery core 2 pegs graft in the cooling chamber 14 of the U type that first cooling portion 11, second cooling portion 12 and third cooling portion 13 surround and form, makes battery core 2 and first cooling portion 11, second cooling portion 12 and third cooling portion 13 press close to or contact the heat transfer, and heat transfer area increases, has improved 2 heat transfer routes of square battery core, reduces 2 bottoms of square battery core and lateral part difference in temperature, improves the homogeneity of 2 temperatures of battery core.

It should be noted that the size of the first cooling portion 11, the second cooling portion 12, and the third cooling portion 13 and the number, shape, and size of the microchannels 3 may be selected according to the external dimensions and the heat exchange amount of the object to be cooled of the battery core 2.

Example 2

The present embodiment provides a cooling apparatus, which includes at least two headers 4 and at least one set of cooling plates 1 provided in the foregoing embodiments, wherein the ends of the second cooling portion 12 and the third cooling portion 13 of the cooling plates 1, which are far away from the first cooling portion 11, are both communicated with one header 4. Since the cooling device employs the cooling plate 1, any advantages of the cooling plate 1 are provided, and thus, detailed description thereof is omitted.

Fig. 6 and 7 show an embodiment of the cooling device, in which the cooling plates 1 are provided with a plurality of sets and arranged side by side along the extending direction of the micro-channels 3 in the first cooling portion 11 and/or arranged side by side perpendicular to the extending direction of the micro-channels 3 in the first cooling portion 11, and the second cooling portion 12 and the third cooling portion 13 of two adjacent sets of cooling plates 1 along the extending direction of the micro-channels 3 in the first cooling portion 11 are communicated with the same header.

Specifically, in the present embodiment, the cooling plate 1 is provided with four groups side by side along the extending direction of the micro-channels 3 in the first cooling portion 11, and four groups side by side along the extending direction perpendicular to the micro-channels 3 in the first cooling portion 11, where the number of the collecting pipes is five, and the collecting pipes are respectively an inlet collecting pipe 41, an outlet collecting pipe 42, a first middle collecting pipe 43, a second middle collecting pipe 44, and a third middle collecting pipe 45. The inlet header 41 is communicated with the third cooling portion 13 of the cooling plate 1 disposed at the outer side, and in the present embodiment, the inlet header 41 is communicated with the third cooling portion 13 of the cooling plate 1 at the right side in fig. 6; the outlet header 42 communicates with the second cooling portion 12 of the other cooling plate 1 disposed on the outer side, and in the present embodiment, the outlet header 42 communicates with the second cooling portion 12 of the left cooling plate 1 in fig. 6. The first, second, and third middle headers 43, 44, and 45 are sequentially arranged in the middle from right to left. The inlet collecting pipe 41, the first middle collecting pipe 43, the second middle collecting pipe 44, the third middle collecting pipe 45 and the outlet collecting pipe 42 are arranged in parallel at intervals and side by side along the extending direction of the microchannel 3 in the first cooling part 11, the second cooling part 12 and the third cooling part 13 of two adjacent groups of cooling plates 1 are communicated with the same collecting pipe along the extending direction of the microchannel 3 in the first cooling part 11, that is, the second cooling part 12 and the third cooling part 13 of two adjacent groups of cooling plates 1 are communicated end to end through the same collecting pipe, that is, the first middle collecting pipe 43, the second middle collecting pipe 44 and the third middle collecting pipe 45 are communicated with the second cooling part 12 and the third cooling part 13 of two adjacent groups of cooling plates 1, the inlet collecting pipe 41 is communicated with the liquid cooling device, the cooling device conveys the cooling medium into the inlet collecting pipe 41, the flow path of the cooling medium is shown in fig. 7, the cooling medium flows into each group of cooling plates 1 through the inlet collecting pipe 41 in sequence, the cooling medium in each group of cooling plates 1 flows through the third cooling part 13, the first cooling part 11 and the second cooling part 12 in sequence, the middle part 43 and the third cooling part 43 and the outlet collecting pipe 42 respectively, and the middle part 43 and the outlet collecting pipe 42 are collected again, and the last cooling device. Through setting up multiunit cooling plate 1 in series, can improve the cooling effect of every cooling plate 1 of group.

As shown in fig. 4 and 5, the collecting pipe 4 is a hollow tubular body with a closable end, a long groove 411 is axially formed on a pipe wall of the tubular body, and one ends of the second cooling part 12 and the third cooling part 13, which are far away from the first cooling part 11, are communicated with the collecting pipe 4 through the long groove 411.

Specifically, in this embodiment, one end of the inlet header pipe 41 and one end of the outlet header pipe 42 are closed, two ends of the first middle header pipe 43, the second middle header pipe 44 and the third middle header pipe 45 are closed, the other end of the inlet header pipe 41 is communicated with an outlet of the cold source device, and the other end of the outlet header pipe 42 is communicated with an inlet of the cold source device, so as to form a circulating cooling loop. When each collecting pipe is connected with the cooling plate 1, the cooling plate 1 is arranged at the position of the long groove 411 and welded by using an alloy aluminum welding rod, so that the assembly is convenient, the cooling plate 1 and the collecting pipes with different sizes and shapes can be used, and the applicability is strong.

As shown in fig. 8 and 9, another embodiment of the cooling device further comprises a main inlet pipe 51 and a main outlet pipe 52, the cooling plate 1 is provided with a plurality of sets and arranged side by side along the extending direction of the micro-channels 3 in the first cooling part 11 and/or arranged side by side along the extending direction perpendicular to the micro-channels 3 in the first cooling part 11, one of the collecting pipes communicated with the second cooling part 12 and the collecting pipe communicated with the third cooling part 13 is communicated with the main inlet pipe 51, and the other is communicated with the main outlet pipe 52.

Specifically, the cooling plates 1 are arranged in four groups side by side along the extending direction of the microchannels 3 in the first cooling part 11, and four groups side by side along the extending direction perpendicular to the extending direction of the microchannels 3 in the first cooling part 11, the second cooling part 12 of any cooling plate 1 arranged side by side along the extending direction of the microchannels 3 in the first cooling part 11 is communicated with the outlet collecting pipe 42, the third cooling part 13 is communicated with the inlet collecting pipe 41, the inlet collecting pipe 51 and the outlet collecting pipe 52 are arranged in parallel, the inlet collecting pipe 51 is communicated with all the inlet collecting pipes 41, the outlet collecting pipe 52 is communicated with all the outlet collecting pipes 42, the inlet collecting pipe 51 is communicated with the heat sink device, the heat sink device delivers the cooling medium into the inlet collecting pipe 51, the flow path of the cooling medium is as shown in fig. 9, in each group of cooling plates 1, the cooling medium flows into the inlet collecting pipe 41 through the inlet collecting pipe 51, the cooling medium flows through the third cooling part 13, the first cooling part 11 and the second cooling part 12 in sequence after flowing into the inlet collecting pipe 41, then flows to the outlet collecting pipe 42, and finally flows out of the cooling device from the outlet collecting pipe 52. The parallel connection scheme can be used for the conditions that the battery modules are large and the battery packs are more, and further enhances the heat exchange effect of each group of battery packs.

The inlet collecting pipe 41, the outlet collecting pipe 42, the inlet pipe 51 and the outlet pipe 52 of the above embodiment are closed at one end, one end of each of the inlet collecting pipe 41 and the outlet collecting pipe 42 is respectively communicated with the inlet pipe 51 and the outlet pipe 52, the other end of the inlet pipe 51 is communicated with the outlet of the cold source device, and the other end of the outlet pipe 52 is communicated with the inlet of the cold source device, so as to form a circulating cooling loop. When the headers are connected to the cooling plate 1, the cooling plate 1 is mounted in the elongated slot 411 and welded by an alloy aluminum welding rod, and similarly, the inlet header 41 and the inlet manifold 51, and the outlet header 42 and the outlet manifold 52 are welded by an alloy aluminum welding rod.

Example 3

The embodiment provides a battery module, which comprises at least one battery core 2 and the cooling device, wherein the battery core 2 is placed in a cooling cavity 14 of a cooling plate 1 of the cooling device, the bottom surface of the battery core 2 is tightly attached to a first cooling part 11 of the cooling plate 1, and a group of opposite side surfaces, close to two tabs 21 of the battery core 2, of the battery core 2 are respectively tightly attached to a second cooling part 12 and a third cooling part 13 of the cooling plate 1. The cooling cavity 14 of the cooling plate 1 is used for placing the battery core 2, because the battery core 2 generates heat and is mainly concentrated on two lug 21 parts, the upper temperature of the whole battery core 2 is higher than the middle lower part, the second cooling part 12 and the third cooling part 13 are close to the lug 21 part on the upper part of the battery core 2, the high-efficiency heat dissipation of the main heat generating part of the battery core 2 is ensured, and the heat exchange efficiency is improved.

Further, the positions of the ends of the second cooling portion 12 and the third cooling portion 13 away from the first cooling portion 11 are higher than the positions where the tabs 21 are provided in the battery core 2. The extension lengths of the second cooling part 12 and the third cooling part 13 are slightly higher than that of the battery core 2, so that the second cooling part 12 and the third cooling part 13 are closer to two tabs 21 of the battery core 2, a cooling path can be increased, the two tabs 21 are cooled better, and the temperature uniformity and the cooling effect of the battery core 2 are improved.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.

Claims (11)

1. A cooling plate is characterized in that the cooling plate (1) comprises a first cooling part, a second cooling part (12) and a third cooling part (13) which are hollow inside, two ends of the first cooling part (11) are respectively communicated with one ends of the second cooling part (12) and the third cooling part (13), and the shapes and/or the extending directions of the second cooling part (12) and the third cooling part (13) are matched with the outer wall of an object to be cooled; the first cooling part (11), the second cooling part (12) and the third cooling part (13) surround to form a cooling cavity (14) with an open top.

2. A cooling plate according to claim 1, characterized in that micro-channels (3) are provided in each of the first cooling portion (11), the second cooling portion (12) and the third cooling portion (13), the micro-channels (3) in the first cooling portion (11), the second cooling portion (12) and the third cooling portion (13) being in communication with each other, and the micro-channels (3) being communicable with a cold source device.

3. A cooling plate according to claim 2, wherein the microchannels (3) are provided in a plurality, and the microchannels (3) are arranged in parallel to each other and uniformly along the length of the first (11), second (12) and third (13) cooling sections.

4. The cold plate of claim 2, wherein said heat sink means is a liquid heat sink means.

5. A cooling plate according to any of claims 1-4, characterized in that the second cooling portion (12) and the third cooling portion (13) are arranged parallel to each other and perpendicular to the first cooling portion (11).

6. A cooling arrangement, characterized in that it comprises at least two headers (4) and at least one set of cooling plates according to any one of claims 1-5, the ends of the second cooling part (12) and the third cooling part (13) of the cooling plates (1) remote from the first cooling part (11) each communicating with one of the headers (4).

7. A cooling arrangement according to claim 6, characterised in that the cooling plates (1) are provided with a plurality of groups and are arranged side by side in the direction of extension of the micro channels (3) in the first cooling section (11) and/or in a direction perpendicular to the direction of extension of the micro channels (3) in the first cooling section (11), and that the second cooling sections (12) and the third cooling sections (13) of two groups of cooling plates (1) adjacent in the direction of extension of the micro channels (3) in the first cooling section (11) communicate with the same header (4).

8. The cooling arrangement according to claim 6, further comprising a main inlet pipe (51) and a main outlet pipe (52), wherein the cooling plates (1) are provided with a plurality of groups and are arranged side by side along the extension direction of the micro-channels (3) in the first cooling section (11) and/or arranged side by side perpendicular to the extension direction of the micro-channels (3) in the first cooling section (11), wherein one of the header (4) communicating with the second cooling section (12) and the header (4) communicating with the third cooling section (13) communicates with the main inlet pipe (51), and wherein the other communicates with the main outlet pipe (52).

9. The cooling device according to any one of claims 6 to 8, wherein the header (4) is a hollow tubular body with a closable end, a long groove (411) is axially formed in a wall of the tubular body, and ends of the second cooling portion (12) and the third cooling portion (13) far away from the first cooling portion (11) are communicated with the header (4) through the long groove (411).

10. A battery module, characterized by comprising at least one battery core (2) and the cooling device according to any one of claims 6-9, wherein the battery core (2) is placed in a cooling cavity (14) of a cooling plate (1) of the cooling device, the bottom surface of the battery core (2) is closely attached to a first cooling part (11) of the cooling plate (1), and one set of opposite side surfaces of the battery core (2), which are close to two tabs (21) of the battery core (2), are closely attached to a second cooling part (12) and a third cooling part (13) of the cooling plate (1), respectively.

11. The battery module according to claim 10, wherein the second cooling part (12) and the third cooling part (13) are located at ends distant from the first cooling part (11) at positions higher than the positions of the tabs (21).

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