Novel battery heat exchange device of liquid cooling plate

Abstract

The utility model discloses a novel battery heat exchange device of a liquid cooling plate, and relates to the technical field of batteries. A first water inlet pipeline and a first water outlet pipeline are arranged in a collector plate, the first water inlet pipeline and the first water outlet pipeline are not communicated with each other, and a water inlet communicated with the first water inlet pipeline and a water outlet communicated with a second water outlet pipeline are formed in one end of the collector plate; the multiple cold plate bodies are evenly and fixedly connected to one side of the collector plate at intervals, second water inlet pipelines and second water outlet pipelines are arranged in the cold plate bodies, the near ends, close to the collector plate, of the second water inlet pipelines communicate with the first water inlet pipelines, and the near ends, close to the collector plate, of the second water outlet pipelines communicate with the first water outlet pipelines. The far end of the second water inlet pipeline communicates with the far end of the second water outlet pipeline, and a circulation loop is formed in the cold plate body. The plurality of battery cell groups are arranged in gaps among the cold plate main bodies; the two end plates are arranged on the two sides of the multiple cold plate bodies correspondingly and fixedly connected with the collector plates.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to a battery heat exchange device with a new type of liquid cooling plate. Background Art

[0002] Batteries are the power source or storage medium for new energy vehicles, energy storage power stations, new energy applications, etc. High-power batteries are increasingly widely used, and the requirements for battery heat dissipation capacity are getting higher and higher; with the rapid development of new energy technologies, batteries, as key components for energy storage and conversion, have been widely used in fields such as electric vehicles, mobile devices, and energy storage systems. The performance and safety of batteries are directly related to the performance and reliability of the entire system. Among them, battery thermal management is one of the key factors to ensure its performance and extend its service life.

[0003] Traditional battery thermal management systems mainly adopt air cooling or contact cooling methods. Although air cooling has a simple structure, its cooling efficiency is low and it is difficult to meet the heat dissipation requirements of high-power density batteries. Contact cooling transfers heat by directly contacting the battery surface, but its cooling area is limited and it is difficult to achieve uniform cooling. Especially in a battery pack, the cooling effect of the edge battery cells is often poor.

[0004] In order to improve the heat dissipation efficiency of batteries, some liquid cooling systems have also emerged in the prior art. These systems circulate a liquid medium to take away the heat generated by the batteries. However, most liquid cooling systems adopt a small-area contact or pipeline design, with a limited contact area, resulting in uneven cooling effects. Especially for high-power batteries, it is difficult to achieve comprehensive and effective cooling. Summary of the Utility Model

[0005] Therefore, an embodiment of the utility model provides a battery heat exchange device with a new type of liquid cooling plate to solve the problems existing in the above technologies.

[0006] In order to achieve the above object, the embodiment of the utility model provides the following technical solutions:

[0007] A battery heat exchange device with a new type of liquid cooling plate, comprising:

[0008] A manifold, in which a first water inlet pipe and a first water outlet pipe are arranged. The first water inlet pipe and the first water outlet pipe are not connected to each other, and an inlet for connecting the first water inlet pipe and an outlet for connecting the second water outlet pipe are arranged at one end of the manifold;

[0009] A number of cold plate bodies, and a number of the cold plate bodies are fixedly connected to one side of the manifold at uniform intervals. A second water inlet pipe and a second water outlet pipe are arranged in the cold plate body, and the proximal end of the second water inlet pipe close to the manifold is communicated with the first water inlet pipe, the proximal end of the second water outlet pipe close to the manifold is communicated with the first water outlet pipe, and the distal ends of the second water inlet pipe and the second water outlet pipe are communicated with each other to form a circulation loop in the cold plate body;

[0010] A number of battery cell groups, and a number of the battery cell groups are arranged in the gaps between the cold plate bodies;

[0011] Two end plates are respectively arranged on both sides of a number of cold plate bodies, and the end plates are fixedly connected to the manifold.

[0012] Optionally, the cold plate body and the manifold are fixedly connected by welding.

[0013] Optionally, at least two groups of battery cell groups are provided. Each group of battery cell groups includes a plurality of battery cells, and the number of battery cells in each group is one less than the number of cold plate bodies. The battery cells and the cold plate bodies are arranged in an alternating manner.

[0014] Optionally, the distance between two adjacent cold plate bodies is adapted to the thickness of the battery cell, and both sides of the battery cell are attached to the two cold plate bodies.

[0015] Optionally, the height of the cold plate body is less than the height of the battery cell, and the bottom of the battery cell is flush with the bottom of the cold plate body. A heat absorption material is arranged above the cold plate body between two adjacent battery cells.

[0016] Optionally, the heat absorption material is a phase change material.

[0017] Optionally, the two end plates are fixedly connected by a connecting plate on the side opposite to the liquid collecting plate.

[0018] Optionally, a liquid cooling box is further included, and the liquid cooling box is arranged at the bottom of the battery cell to cool the bottom of the battery cell.

[0019] Optionally, the cold plate body and the manifold are integrally formed.

[0020] Optionally, multiple groups of battery cell groups are connected by jumper copper bars, and multiple battery cells in each group of battery cell groups are connected by series busbars.

[0021] The utility model has at least the following beneficial effects:

[0022] The utility model can increase the contact area between the battery cells and the cold plate main bodies by arranging a plurality of cold plate main bodies with intervals on one side of the liquid collecting plate, arranging a communicated first water inlet pipe and a second water inlet pipe on the liquid collecting plate and the cold plate main bodies, and arranging the battery cell group in the intervals between the cold plate main bodies, so as to realize large-area cooling of the battery cells and improve the cooling effect. Description of the Drawings

[0023] In order to more clearly illustrate the prior art and the present utility model, the drawings required for describing the prior art and the embodiments of the present utility model will be briefly introduced below. Obviously, the drawings in the following description are only exemplary, and those of ordinary skill in the art can also obtain other drawings according to the provided drawings without creative efforts.

[0024] The structures, ratios, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope covered by the technical content disclosed in the present utility model without affecting the effects that the present utility model can produce and the purposes that can be achieved.

[0025] Figure 1 It is a schematic diagram of the structure from the first perspective of an embodiment of the present utility model;

[0026] Figure 2 It is an exploded schematic diagram of an embodiment of the present utility model;

[0027] Figure 3 It is a schematic diagram of the liquid cooling plate structure of an embodiment of the present utility model;

[0028] Figure 4 It is a schematic diagram of the structure from the second perspective of an embodiment of the present utility model;

[0029] Figure 5 For Figure 4 The enlarged schematic diagram of part A in

[0030] Figure 6 It is a schematic diagram of the internal pipeline of the liquid cooling plate of an embodiment of the present utility model.

[0031] Explanation of the reference numerals in the drawings:

[0032] 1. Manifold; 2. First inlet pipe; 3. Inlet; 4. Outlet; 5. Cold plate body; 6. Second inlet pipe; 7. Second outlet pipe; 8. Battery cell group; 9. End plate; 10. Phase change material; 11. Connecting plate; 12. Liquid cooling box; 13. Jumper copper bar; 14. Inter-series busbar; 15. Lead-out busbar; 16. First outlet pipe. Detailed implementation manners

[0033] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more. Terms such as "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above-mentioned drawings are intended to distinguish the objects being referred to. For a solution with a time sequence process, such a term expression does not necessarily need to be understood as describing a specific order or sequence, and for a solution of a device structure, such a term expression does not distinguish the importance level, positional relationship, etc.

[0035] In addition, the terms "comprising", "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily need to be limited to those steps or units that are clearly listed, but may also include other steps or units that are inherent to these processes, methods, products or devices but are not clearly listed, or steps or units added by further optimized solutions based on the concept of the present invention.

[0036] As Figures 1-6 shown, a battery heat exchange device with a new type of liquid cooling plate disclosed by the present invention includes:

[0037] A manifold 1, in which a first inlet pipe 2 and a first outlet pipe 16 are arranged. The first inlet pipe 2 and the first outlet pipe 16 are not connected to each other, and one end of the manifold 1 is provided with an inlet 3 communicating with the first inlet pipe 2 and an outlet 4 communicating with the second outlet pipe 7;

[0038] Several cold plate bodies 5 are uniformly and spacedly fixedly connected to one side of the manifold 1. A second water inlet pipe 6 and a second water outlet pipe 7 are arranged in the cold plate body 5. The proximal end of the second water inlet pipe 6 close to the manifold 1 is connected to the first water inlet pipe 2, and the proximal end of the second water outlet pipe 7 close to the manifold 1 is connected to the first water outlet pipe 16. The distal ends of the second water inlet pipe 6 and the second water outlet pipe 7 are connected, forming a circulation loop in the cold plate body 5;

[0039] Several cell groups 8 are arranged in the gaps between the cold plate bodies 5;

[0040] Two end plates 9 are respectively arranged on both sides of several cold plate bodies 5, and the end plates 9 are fixedly connected to the manifold 1.

[0041] In this embodiment, the above-mentioned liquid collecting plate serves as the input and output structure of the cooling liquid. Two independent pipes are arranged inside it, namely the first water inlet pipe and the first water outlet pipe. The first water inlet pipe and the second water outlet pipe are arranged along the length direction of the liquid collecting plate;

[0042] A plurality of cold plate bodies 5 are arranged on the side surface of the liquid collecting plate along its length direction as the cooling structure of the cells. The plurality of cold plate bodies 5 are evenly and spacedly arranged on the side surface of the liquid collecting plate. The gap between two adjacent cold plate bodies 5 serves as the installation position of the cells. The two sides of the cold plate body 5 are used to contact the cells to cool and lower the temperature of the cells, so that the contact area between the cells and the cold plate body 5 is large enough, thereby improving the cooling efficiency and cooling effect;

[0043] The above-mentioned end plates 9 are arranged on both sides of the outermost two cold plate bodies 5 for fixing and protecting the cold plates. The cold plate bodies 5 are fixedly connected to the liquid collecting plate.

[0044] The above-mentioned liquid collecting plate is arranged on one side of the cold plate body 5, and the interval between the cold plate bodies 5 on the other side is an open structure, which is convenient for inserting the cells and improves the convenience of cell installation.

[0045] The cold plate body 5 is fixedly connected to the manifold 1 by welding.

[0046] The above-mentioned cold plate body 5 and the manifold 1 are fixedly connected by welding. In addition, the cold plate body 5 and the manifold 1 can also be integrally formed.

[0047] In a further embodiment, at least two groups of the cell groups 8 are provided. Each group of cell groups 8 includes a plurality of cells, and the number of cells in each group is one less than the number of cold plate bodies 5. The cells and the cold plate bodies 5 are arranged in an alternating manner.

[0048] Each of the above-mentioned battery cell groups 8 includes a plurality of battery cells. The number of battery cells is the same as the number of intervals of the cold plate. Each battery cell can be inserted into the interval between the cold plates, so that both sides of the battery cell are in contact with the cold plate body 5 for cooling.

[0049] The fixation between the battery cell and the cold plate body 5 can adopt existing installation methods, which will not be elaborated here.

[0050] The distance between two adjacent cold plate bodies 5 is adapted to the thickness of the battery cell, and both sides of the battery cell are arranged in contact with the two cold plate bodies 5.

[0051] Adapting the size of the battery cell to that of the cold plate body 5 can make both sides of the battery cell fully contact with the plate surface of the cold plate body 5, improving the cooling effect.

[0052] In a further embodiment, in order to further improve the cooling effect, the height of the cold plate body 5 is less than the height of the battery cell, and the bottom of the battery cell is flush with the bottom of the cold plate body 5. An endothermic material is arranged above the cold plate body 5 between two adjacent battery cells.

[0053] In addition, when installing multiple battery cell groups 8, a certain gap can be set between the battery cell groups 8, and a phase change material 10 is filled in the gap to improve the heat dissipation effect.

[0054] The height of the above-mentioned cold plate body 5 is less than the height of the battery cell, so that a gap is formed between the parts of two adjacent battery cells that are higher than the cold plate body 5, and an endothermic material is filled in the gap;

[0055] The above-mentioned endothermic material is a phase change material 10, which can effectively absorb a large amount of heat generated instantaneously during high-current operation.

[0056] Furthermore, the two end plates 9 are fixedly connected by a connecting plate 11 on the side opposite to the liquid collecting plate.

[0057] After the battery cells are installed, the connecting plate 11 is installed on the open side of the cold plate body 5, and both ends of the connecting plate 11 are installed on the end plates 9 to limit the internal battery cells.

[0058] In another embodiment, a liquid cooling box 12 is further included. The liquid cooling box 12 is arranged at the bottom of the battery cells to cool the bottom of the battery cells.

[0059] The structure of the battery cell group 8, the liquid collecting plate and the cold plate body 5 is installed in the liquid cooling box 12, and the bottom of the battery cell is in contact with the cooling part of the liquid cooling box 12 to cool the battery cell at the bottom.

[0060] Multiple battery cell groups 8 are connected by a jumper copper bar 13, and multiple battery cells in each battery cell group 8 are connected by a series bus bar 14.

[0061] The heat exchange device of the present application is applicable to the liquid cooling form of all modules and battery packs.

[0062] The main features of the present utility model are that it can achieve large-area cooling of the battery cells, has a large contact area with the cold plate, and has a good cooling effect. The new cold plate undertakes part of the structure fixing function, reduces the connecting and fixing parts, integrates the current collector plate 1 and the liquid cooling plate, reduces the joints in the upper and lower coolant channels, and simplifies the structure form; the phase change material 10 filled between the battery cells can effectively absorb a large amount of heat generated instantaneously during high-current operation; and the cold plate structure has a single-sided opening, which is convenient for the operation of installing the battery cells and has a larger tolerance margin for assembly.

[0063] The above several specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in some embodiments.

[0064] The technical features of the above embodiments can be combined arbitrarily (as long as there is no contradiction in the combination of these technical features). For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written out should also be considered to be within the scope described in this specification.

[0065] In the above text, the present utility model has been described in a relatively specific and detailed manner through general descriptions and specific embodiments. It should be noted that, without departing from the concept of the present utility model, it is obvious that several modifications and improvements can still be made to these specific embodiments, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A battery heat exchange device with a new type of liquid cooling plate, characterized in that, Comprising: A current collector plate, within which there is arranged a first water inlet pipe and a first water outlet pipe. The first water inlet pipe and the first water outlet pipe are not connected to each other, and at one end of the current collector plate, there is provided a water inlet communicating with the first water inlet pipe and a water outlet communicating with the second water outlet pipe; A number of cold plate bodies, which are evenly spaced and fixedly connected to one side of the current collector plate. Within each cold plate body, there are arranged a second water inlet pipe and a second water outlet pipe. The proximal end of the second water inlet pipe close to the current collector plate is connected to the first water inlet pipe, the proximal end of the second water outlet pipe close to the current collector plate is connected to the first water outlet pipe, and the distal ends of the second water inlet pipe and the second water outlet pipe are connected to form a circulation loop within the cold plate body; A number of battery cell groups, which are arranged in the gaps between the cold plate bodies; Two end plates, which are respectively arranged on both sides of the number of cold plate bodies, and the end plates are fixedly connected to the current collector plate.

2. The battery heat exchange device of a new type of liquid cooling plate according to claim 1, characterized in that: The cold plate body and the current collector plate are fixedly connected by welding.

3. The battery heat exchange device of a new type of liquid cooling plate according to claim 1, characterized in that: There are at least two groups of battery cell groups. Each group of battery cell groups includes a plurality of battery cells, and the number of battery cells in each group is one less than the number of cold plate bodies. The battery cells and the cold plate bodies are arranged in an alternating manner.

4. The battery heat exchange device of a new type of liquid cooling plate according to claim 1, characterized in that: The distance between two adjacent cold plate bodies is adapted to the thickness of the battery cells, and both sides of the battery cells are in contact with the two cold plate bodies.

5. The battery heat exchange device of a new type of liquid cooling plate according to claim 1, characterized in that: The height of the cold plate body is less than the height of the battery cells, and the bottom of the battery cells is flush with the bottom of the cold plate body. Heat-absorbing material is arranged above the cold plate body between two adjacent battery cells.

6. The battery heat exchange device of a new type of liquid cooling plate according to claim 5, characterized in that: The heat-absorbing material is a phase change material.

7. The battery heat exchange device of a new type of liquid cooling plate according to claim 1, characterized in that: The two end plates are fixedly connected by a connecting plate on the side opposite to the liquid collector plate.

8. The battery heat exchange device of a new type of liquid cooling plate according to claim 1, characterized in that: It further includes a liquid cooling box, which is arranged at the bottom of the battery cells to cool the bottom of the battery cells.

9. The battery heat exchange device of a new type of liquid cooling plate according to claim 1, characterized in that: The cold plate body and the current collector plate are integrally formed.

10. The battery heat exchange device of a new type of liquid cooling plate according to claim 1, characterized in that: Multiple groups of battery cell groups are connected by jumper copper bars, and multiple battery cells in each group of battery cell groups are connected by series connection busbars.

Images