CN216671761U

CN216671761U - Heat dissipation system and battery module

Info

Publication number: CN216671761U
Application number: CN202123442823.4U
Authority: CN
Inventors: 李登科; 何亚飞; 其他发明人请求不公开姓名
Original assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Current assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-06-03
Anticipated expiration: 2031-12-31

Abstract

The utility model discloses a heat dissipation system which is used for dissipating heat for a plurality of parallel battery cores and comprises a plurality of cold plates. A plurality of the cold drawing sets up side by side, and a plurality of cold drawing generally set up in the top or the bottom of multirow electricity core, dispel the heat for multirow electricity core through the continuous rivers of input. The sides of two adjacent cold plates are mutually abutted and detachably connected. The plurality of cold plates are detachably connected, the required number of the cold plates can be selected according to the size of the battery module, the battery module is suitable for battery modules of different specifications, the number of the cold plates produced by opening the die for certain small number of battery modules is reduced, and the price of the cold plates is reduced.

Description

Heat dissipation system and battery module

Technical Field

The utility model relates to the technical field of battery heat dissipation, in particular to a heat dissipation system and a battery module.

Background

A lithium ion battery is a type of secondary battery that mainly operates by movement of lithium ions between a positive electrode and a negative electrode. During the charge and discharge process, lithium ions are intercalated and deintercalated between the two electrodes. During charging, lithium ions are extracted from the positive electrode and inserted into the negative electrode through the electrolyte, the negative electrode is in a lithium-rich state, and during discharging, on the contrary, the lithium ion battery generates much heat during use, so that heat dissipation treatment is needed.

The battery module applied to the automobile is generally large, the generated heat is much, and the heat accumulation can be caused by untimely heat dissipation, so that the battery module is out of control. In the prior art, the battery cell is generally cooled by adopting a cold plate, and liquid water is continuously injected and discharged in the cold plate to cool the battery cell. However, different automobile-used battery modules have different specifications and different sizes, and the manufacture of cold plates of different models takes time, and the manufacture of a small number of cold plates of different models is expensive, so that a cold plate which can be adapted to the battery modules of different sizes is urgently needed to reduce the manufacturing cost of the cold plate.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a heat dissipation system to solve the above problems of the prior art.

In order to solve the above problem, according to an aspect of the present invention, a heat dissipation system for dissipating heat from a plurality of side-by-side cells and including a plurality of cold plates is provided. A plurality of the cold drawing sets up side by side, and a plurality of cold drawing generally set up in the top or the bottom of multirow electricity core, dispel the heat for multirow electricity core through the continuous rivers of input. The sides of two adjacent cold plates are mutually abutted and detachably connected. The plurality of cold plates are detachably connected, the required number of the cold plates can be selected according to the size of the battery module, the battery module is suitable for battery modules of different specifications, the number of the cold plates produced by opening the die for certain small number of battery modules is reduced, and the price of the cold plates is reduced.

In one embodiment, a concave first clamping groove is formed in one of two opposite side edges of the cold plate, and the first clamping groove extends from one end of the cold plate to the other end of the cold plate;

the other side edge is provided with a first convex strip extending along the direction of the adjacent cold plate, and the shape of the first convex strip is matched with the first clamping groove and extends along the side edge of the cold plate.

In one embodiment, the diameter of the first card slot gradually increases from the opening of the side edge to the bottom of the first card slot.

In one embodiment, the cold plate is provided with a cooling channel, and two openings of the cooling channel are positioned at the end part of the cold plate; the heat dissipation system further comprises a bus piece detachably connected with the ends of the cold plates and communicated with the cooling channels.

In one embodiment, one of the end surface of the cold plate or the side edge of the confluence piece is provided with a second clamping groove which is concave inwards, and the other one of the end surface of the cold plate or the side edge of the confluence piece is provided with a second convex strip which is convex, wherein the shape of the second convex strip is matched with that of the second clamping groove.

In one embodiment, the two openings of the cooling channel are located at two ends of the cold plate, respectively;

the confluence piece is provided with a confluence groove and a liquid flow port, the liquid flow port is communicated with the confluence groove, and the confluence groove of the confluence piece is communicated with the openings of the cooling channels of the plurality of cold plates.

In one embodiment, the bus bars are two groups and each group includes a plurality of the bus bars, the plurality of the bus bars are arranged in the direction of the plurality of cold plates and the ends of the plurality of the bus bars abut against each other; the two sets of the bus bars are connected to both ends of the plurality of the cold plates, respectively.

In one embodiment, each of the headers connects ends of at least one of the cold plates.

In one embodiment, the ends of the plurality of cold plates are different sizes.

The utility model also relates to a battery module, which comprises a plurality of parallel battery cores and the heat dissipation system; the heat dissipation system is installed at the top and/or the bottom of the plurality of side-by-side cells.

The plurality of cold plates are detachably connected, the required number of the cold plates can be selected according to the size of the battery module, and the battery module is suitable for the battery modules with different specifications. Because battery module array size is inconsistent, the width of a plurality of cold boards sets to different sizes. When the battery modules correspond to different numbers, only the cold plates with larger or smaller widths need to be added or replaced, and the cold plates do not need to be produced according to the independent die sinking of the specifications of each battery module, so that the energy consumption and waste of the cold plates are reduced, and the adaptability of the cold plates is improved.

Drawings

Fig. 1 is a schematic view of a heat dissipation system according to an embodiment of the present invention.

FIG. 2 is a schematic view of a plurality of cold plates side by side according to one embodiment of the utility model.

Fig. 3 is a partially enlarged view of a portion a in fig. 2.

Fig. 4 is an exploded view of a heat dissipation system in accordance with an embodiment of the present invention.

Fig. 5 is a partially enlarged view of a portion B in fig. 4.

Fig. 6 is an exploded view of a battery module according to an embodiment of the present invention.

Reference numerals: 100. a heat dissipation system; 1. a cold plate; 11. a first card slot; 12. a first rib; 13. a cooling channel; 2. a bus bar; 21. a second card slot; 22. a second convex strip; 23. a liquid outlet; 200. a battery module; 300. and (4) arranging the cells side by side.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the utility model can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.

In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the following description, for the purposes of clearly illustrating the structure and operation of the present invention, directional terms will be used, but terms such as "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be construed as words of convenience and should not be construed as limiting terms.

The utility model relates to a heat dissipation system 100, wherein the heat dissipation system 100 is used for dissipating heat of a plurality of side-by-side battery cells 300 and comprises a plurality of cold plates 1. A plurality of cold drawing 1 ground coplane setting side by side, a plurality of cold drawing 1 generally set up in the top or the bottom of multirow electricity core, dispel the heat for multirow electricity core through the continuous rivers of input. The sides of two adjacent cold plates 1 in the plurality of cold plates 1 are mutually abutted and detachably connected. According to the utility model, the plurality of cold plates 1 are detachably connected, and the required number of the cold plates 1 can be selected according to the size of the battery module 200, so that cold plate combinations with different sizes and areas can be formed, the battery modules 200 with different specifications can be adapted, the number of the cold plates 1 which are produced by opening the molds for a certain small number of the battery modules 200 is reduced, and the manufacturing cost of the cold plates 1 is reduced.

The cold plate 1 is rectangular and has a top surface, a bottom surface, two opposite side edges and two end surfaces, as shown in fig. 1 and 6, when in use, the bottom surface or the top surface of the cold plate 1 is close to the plurality of side-by-side cells 300, and the two end surfaces are used for water inlet or water outlet. The sides of the plurality of cold plates 1 abut against each other and are detachably connected. It will be appreciated that two adjacent cold plates 1 may be removably connected in a number of ways. In one embodiment, two sides of the cold plate 1 are provided with connecting pieces extending towards the top surface of the cold plate 1, the connecting pieces are flat and perpendicular to the top surface of the cold plate 1, through holes are formed in the connecting pieces, the connecting pieces of the side plates are mutually abutted, the through holes are correspondingly formed, and two adjacent cold plates 1 can be detachably connected through bolts or screws.

Optionally, one of the two opposite sides of the cold plate 1 is provided with a first recessed slot 11, as shown in fig. 2 and 3, and the first recessed slot 11 extends from one end of the cold plate 1 to the other end. The other side edge is provided with a first convex strip 12 extending along the direction of the adjacent cold plate 1, and the shape of the first convex strip 12 is matched with the first clamping groove 11 and extends along the side edge of the cold plate 1. The first protruding strip 12 of one cold plate 1 of two adjacent cold plates 1 can be clamped into the first clamping groove 11 of the other cold plate 1, and the two cold plates 1 can be detachably connected through friction force. The cross-sectional dimension of the first protrusion 12 may be designed to be slightly larger than the cross-sectional dimension of the first locking groove 11, so as to ensure a firm connection between adjacent cold plates by interference fit. After the lateral part of a plurality of cold plates 1 is connected, connect a plurality of cold plates 1 and converge piece 2, make the both ends of a plurality of cold plates 1 fixed through converging piece 2, a plurality of cold plates 1 can form more stable cooling system 100. It should be understood that the size of the bottom opening of the first card slot may be greater than or equal to the size of the top opening, but not less than the size of the top opening. In other embodiments, the first locking groove 11 may be replaced by a plurality of cylindrical grooves, the first locking strip may be replaced by a plurality of cylindrical connecting columns, and the connecting columns and the grooves are matched in shape and can be locked into the grooves to detachably connect the two cold plates 1.

Alternatively, the opening of the first card slot 11 along the side edge gradually increases to the bottom of the first card slot 11, and the size of the top of the first card slot 11 is smaller than that of the bottom. The size of first card strip needs to match the size of first draw-in groove 11, and the top size of first card strip is greater than the size of bottom promptly, can penetrate to the other end from the one end of the first draw-in groove 11 of adjacent cold drawing 1 with first card strip, because the bottom size of first draw-in groove 11 is bigger, the top size is smaller, and the size at top can restrict first card strip and remove along the array direction of a plurality of cold drawing 1 to prevent to break away from connecting between the adjacent cold drawing. After a plurality of cold drawing 1 are connected, piece 2 that converges can be installed at a plurality of both ends of cold drawing 1, and a plurality of pieces 2 that converge can support and lean on the box of car for a plurality of cold drawing 1 can not remove towards both ends.

The cold plate 1 is provided with a cooling channel 13, and two openings of the cooling channel 13 are located at the end of the cold plate 1. The heat dissipation system 100 also includes a bus bar 2, the bus bar 2 being removably connected to the ends of the plurality of cold plates 1 and in communication with the cooling channels 13. The cooling channels 13 extend along the end faces of the cold plate 1 at both ends of the cold plate, and two openings may be located at one or both end faces of the cold plate 1, one of the openings being for water intake and the other opening being for water drainage. The cooling channels 13 may be a plurality of or a single cooling channel 13, and the single cooling channel 13 may also be formed by continuously turning around near both ends of the cold plate 1 to distribute the channels throughout the cold plate 1. The cooling channels 13 have a plurality of openings, and the plurality of openings are located at one end of the cold plate 1, or may be disposed at two ends of the cold plate 1, as shown in fig. 2, the plurality of cooling channels 13 are channels with rectangular cross sections, and the plurality of cooling channels are disposed in parallel, and the two openings are located at two ends of the cold plate 1, respectively. It should be understood that in other embodiments, the cooling channel 13 may have a circular or any other cross-sectional shape without affecting the practice of the present invention.

The bus bar 2 and the cold plate 1 can be detachably connected in various ways, for example, a plurality of cold plates 1 can be connected, one of the end surface of the cold plate 1 or the side surface of the bus bar 2 is provided with an inwardly concave second slot 21, the other one is provided with an outwardly convex second protruding strip 22, and the shape of the second protruding strip 22 is matched with the second slot 21. It should be understood that the second ribs 22 are required to avoid blocking the openings of the cooling channels 13, and as shown in fig. 3 and 4, the second ribs 22 may be provided in a plurality and spaced apart from each other, and the openings of the cooling channels 13 and the second ribs 22 are misaligned to avoid blocking the openings of the cooling channels 13.

Alternatively, the two openings of the cooling channel 13 are located at the two ends of the cold plate 1, respectively. The confluence piece 2 is provided with a confluence groove and a liquid flow port, the liquid flow port is communicated with the confluence groove, and the confluence groove is communicated with the openings of the cooling channels 13 of the cold plates 1. The opening of a plurality of cold drawing 1 of piece 2 intercommunication that converges, outside water source can be to the groove of converging constantly injected water, and water rethread converges the groove and flows into a plurality of cooling channel 13 and make multirow electricity core cooling. Piece 2 converges is rectangular form, converges the tip opening of groove towards a plurality of cold plates 1 and has a liquid mouth, converges and connects behind the tip of cold plate 1, converges the opening and a plurality of cooling channel 13 intercommunication in groove, and outside water source can flow into the groove of converging again through flowing the liquid mouth and flow into cooling channel 13.

Optionally, the bus bars 2 are divided into two groups, each group includes a plurality of bus bars 2, the plurality of bus bars 2 are arranged along the arrangement direction of the plurality of cold plates 1, and the ends of the plurality of bus bars 2 abut against each other; as shown in fig. 4, two sets of bus bars 2 are respectively connected to both ends of the plurality of cold plates 1. The two groups of confluence pieces 2 are respectively connected with an external water source and a drainage device, one is used for water inlet, and the other is used for drainage. Two sets of piece 2 that converges communicate two openings of a plurality of cold drawing 1 respectively, as shown in the figure, the opening of a plurality of cold drawing 1 is located the both ends of a plurality of cold drawing 1, and two sets of piece 2 that converges are located the both ends of a plurality of cold drawing 1 respectively.

The lengths of the confluence pieces 2 may be the same or different, in the embodiment shown in the figure, the specifications of each confluence piece 2 are the same, and each confluence piece 2 is connected with the ends of two cold plates 1, it should be understood that each confluence piece 2 may correspond to the cooling channel 13 of one cold plate 1, and may also correspond to the cooling channels 13 of a plurality of cold plates 1, without affecting the implementation of the present invention.

Alternatively, two bus bars 2 are provided, and the two bus bars 2 are respectively located at both ends of the plurality of cold plates 1. One of the confluence pieces 2 is used for feeding water and communicating with the openings of the cooling passages 13 of one end of the plurality of cold plates 1, and the other confluence piece 2 is used for draining water and communicating with the openings of the cooling passages 13 of the other end of the plurality of cold plates 1.

The end size of a plurality of cold plates 1 is different, and the width of a plurality of cold plates 1 is different in order to adapt to the multirow electricity core of different array quantity. Because the battery module 200 is arranged in different sizes, the width of a plurality of cold plates 1 is set to different sizes, when the battery modules 200 corresponding to different numbers are used, only the cold plates 1 with larger or smaller widths need to be added or replaced, the cold plates 1 do not need to be produced according to the independent die sinking of the specification of each battery module 200, the energy consumption and the waste of the cold plates 1 are reduced, and the adaptability of the cold plates 1 is improved.

The utility model further relates to a battery module 200, as shown in fig. 6, the battery module 200 includes a plurality of side-by-side cells 300 and the above heat dissipation system 100, and the heat dissipation system 100 is installed on the top or bottom of the plurality of side-by-side cells 300, or on the top and bottom of a plurality of rows of cells.

While the preferred embodiments of the present invention have been illustrated and described in detail, it should be understood that various changes and modifications of the utility model can be effected therein by those skilled in the art after reading the above teachings of the utility model. Such equivalents are intended to fall within the scope of the claims appended hereto.

Claims

1. The utility model provides a heat dissipation system, heat dissipation system is used for a plurality of electric core heat dissipations side by side, and its characterized in that includes a plurality of cold plates, and is a plurality of the cold drawing sets up side by side, adjacent two the side of cold drawing supports each other and leans on and can dismantle the connection.

2. The heat dissipation system of claim 1,

a first concave clamping groove is formed in one of the two opposite side edges of the cold plate, and the first clamping groove extends from one end of the cold plate to the other end of the cold plate;

3. The heat dissipating system of claim 2, wherein the diameter of the first slot increases along the opening of the side edge to the bottom of the first slot.

4. The heat dissipation system of claim 1, wherein the cold plate is provided with cooling channels, and the two openings of the cooling channels are located at the ends of the cold plate; the heat dissipation system further comprises a bus piece detachably connected with the ends of the cold plates and communicated with the cooling channels.

5. The heat dissipation system of claim 4, wherein one of the end surface of the cold plate or the side edge of the bus bar is provided with a second inwardly recessed locking groove, and the other is provided with a second protruding strip, wherein the second protruding strip is matched with the second locking groove in shape.

6. The heat dissipating system of claim 4, wherein the two openings of the cooling channel are located at two ends of the cold plate, respectively;

7. The heat dissipating system of claim 6, wherein the bus bars are provided in two sets, each set including a plurality of the bus bars arranged in a direction of the plurality of cold plates and ends of the plurality of the bus bars abutting against each other; the two sets of the bus bars are connected to both ends of the plurality of the cold plates, respectively.

8. The heat dissipating system of claim 7, wherein each of the headers connects ends of at least one of the cold plates.

9. The heat dissipation system of claim 1, wherein a plurality of the cold plates differ in end size.

10. A battery module, comprising:

a plurality of side-by-side cells;

the heat dissipation system of claim 1, mounted on top and/or bottom of a plurality of the side-by-side cells.