Energy storage system and heat dissipation device thereof

Abstract

The present application discloses an energy storage system and a heat dissipation device thereof. The heat dissipation device of the energy storage system includes a collector and a heat dissipation channel, wherein the collector is provided with a coolant inlet and a coolant outlet; the heat dissipation channel is used for heat exchange with a battery cell, the heat dissipation inlet of the heat dissipation channel is connected to the coolant inlet, the heat dissipation outlet of the heat dissipation channel is connected to the coolant outlet, and there are at least two heat dissipation channels arranged in parallel. Since the heat dissipation channels are arranged in parallel, compared with the existing channels arranged in series, the flow path of the coolant is shortened, the temperature difference of the battery cells at different positions on the coolant flow path is reduced, the temperature uniformity of the battery cells in the energy storage system is improved, and the charging and discharging efficiency and service life of the battery cells are improved.

Description

Technical Field

[0001] The present application relates to the technical field of heat dissipation of energy storage systems, and more specifically, to an energy storage system and a heat dissipation device thereof. Background Art

[0002] In an energy storage system, a liquid cooling plate is usually used to dissipate heat from the battery, wherein the liquid cooling plate is arranged at the bottom of the battery pack and is in direct contact with the battery.

[0003] The various flow channels for the coolant to flow through the above-mentioned liquid cooling plate are designed in series, resulting in a longer flow path of the coolant in the liquid cooling plate. The temperature of the coolant increases as the flow path of the coolant increases, resulting in the heat dissipation performance of the coolant to the battery cell decreasing as the flow path of the coolant increases, resulting in a large temperature difference between the battery cells at different positions on the flow path of the coolant, resulting in poor temperature uniformity of the battery cells in the energy storage system, affecting the charging and discharging efficiency and service life of the battery cells.

[0004] In summary, how to dissipate heat from the batteries of an energy storage system to improve the temperature uniformity of the battery cells in the energy storage system and to improve the charging and discharging efficiency and service life of the battery cells is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of the present application is to provide an energy storage system and a heat dissipation device thereof, so as to improve the temperature uniformity of the battery cells in the energy storage system and improve the charging and discharging efficiency and service life of the battery cells.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A heat dissipation device for an energy storage system comprises a collecting pipe and a heat dissipation channel, wherein the collecting pipe is provided with a coolant inlet and a coolant outlet; the heat dissipation channel is used for heat exchange with a battery cell, the heat dissipation inlet of the heat dissipation channel is connected to the coolant inlet, the heat dissipation outlet of the heat dissipation channel is connected to the coolant outlet, and there are at least two heat dissipation channels which are arranged in parallel.

[0008] Optionally, all of the heat dissipation channels are located on the same side of the manifold.

[0009] Optionally, a partition is provided in the collecting tube, and the partition divides the tube cavity of the collecting tube into a liquid inlet cavity and a liquid outlet cavity isolated from each other; wherein the cooling liquid inlet and the heat dissipation inlet are both connected to the liquid inlet cavity, and the heat dissipation outlet and the cooling liquid outlet are both connected to the liquid outlet cavity.

[0010] Optionally, the liquid inlet chamber and the liquid outlet chamber are distributed in sequence along the vertical direction.

[0011] Optionally, the heat dissipation outlet and the heat dissipation inlet of the heat dissipation channel are arranged at the same height position of the collecting pipe, and the heat dissipation outlet and the heat dissipation inlet are distributed sequentially along the vertical direction in the heat dissipation channel.

[0012] Optionally, the heat dissipation channel is U-shaped.

[0013] Optionally, the cross-section of the collecting tube is quadrilateral, and the cross-section is perpendicular to the length direction of the collecting tube; and / or, the collecting tube is provided with a connecting port, and the heat dissipation outlet end and the heat dissipation inlet end of the heat dissipation channel are both arranged at the connecting port, and the connecting port is provided with a card slot connected to the heat dissipation channel.

[0014] Optionally, the heat dissipation channel is a heat dissipation pipe.

[0015] Optionally, the heat dissipation channel is a harmonica tube.

[0016] Optionally, a heat-conducting layer is further included, wherein the heat-conducting layer is arranged on the outer surface of the heat-dissipating channel, and the heat-dissipating channel is used for heat exchange between the heat-conducting layer and the battery core.

[0017] Optionally, the heat dissipation device of the energy storage system also includes a liquid inlet joint and a liquid outlet joint, the liquid inlet joint is arranged at the coolant inlet, and the liquid inlet joint is connected to the coolant inlet; the liquid outlet joint is arranged at the coolant outlet, and the liquid outlet joint is connected to the coolant outlet.

[0018] Based on the heat dissipation device of the energy storage system provided above, the present application also provides an energy storage system, which includes: a battery cell, and the heat dissipation device of the energy storage system described in any one of the above items.

[0019] The heat dissipation device of the energy storage system provided in the present application includes a collector and a heat dissipation channel. The collector is provided with a coolant inlet and a coolant outlet, so that the collector can allow coolant to enter and flow out; the heat dissipation channel is used for heat exchange with the battery cell, the heat dissipation inlet of the heat dissipation channel is connected to the coolant inlet, the heat dissipation outlet of the heat dissipation channel is connected to the coolant outlet, and there are at least two heat dissipation channels and they are arranged in parallel, so that the coolant is distributed to at least two heat dissipation channels arranged in parallel through the collector, and the coolant flows through the heat dissipation channel to achieve heat exchange with the battery cell, and the coolant flowing through the heat dissipation channel enters the collector and is discharged through the coolant outlet, so that the heat dissipation of the battery cell is achieved. Since the heat dissipation channels are arranged in parallel, compared with the existing channels arranged in series, the flow path of the coolant is shortened, the temperature difference of the battery cells at different positions on the coolant flow path is reduced, the temperature uniformity of the battery cells in the energy storage system is improved, and the charging and discharging efficiency and service life of the battery cells are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0021] Figure 1 An axonometric diagram of an energy storage system provided in an embodiment of the present application;

[0022] Figure 2 A front view of the energy storage system provided in an embodiment of the present application;

[0023] Figure 3 A top view of the energy storage system provided in an embodiment of the present application;

[0024] Figure 4 An axonometric view of a collector in a heat dissipation device of an energy storage system provided in an embodiment of the present application;

[0025] Figure 5 for Figure 4 A front view of the header is shown;

[0026] Figure 6 A schematic diagram of the structure of a heat dissipation channel in a heat dissipation device of an energy storage system provided in an embodiment of the present application.

[0027] Description of reference numerals:

[0028] 1 is the liquid inlet connector;

[0029] 2 is a liquid outlet connector;

[0030] 3 is a manifold, 31 is a coolant inlet, 32 is a coolant outlet, 33 is a connecting port, 34 is a partition, 35 is a liquid inlet cavity, and 36 is a liquid outlet cavity;

[0031] 4 is a heat dissipation channel, 41 is a heat dissipation inlet, and 42 is a heat dissipation outlet;

[0032] 5 is the battery cell;

[0033] 6 is a heat conducting layer. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be used as limitations on the present application. As used in the specification and the appended claims of the present application, the singular expressions "one", "a kind", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context. It should also be understood that in the embodiments of the present application, "one or more" refers to one, two or more; "and / or" describes the association relationship of the associated objects, indicating that three relationships may exist; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0036] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0037] The multiple involved in the embodiments of the present application means greater than or equal to two. It should be noted that in the description of the embodiments of the present application, the words "first", "second", etc. are only used for the purpose of distinguishing the description, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying an order.

[0038] like Figure 1-Figure 3 As shown, the heat dissipation device of the energy storage system provided in the embodiment of the present application includes a collecting pipe 3 and a heat dissipation channel 4.

[0039] like Figure 4 and Figure 5 As shown, the manifold 3 is used for coolant to flow through. Specifically, the manifold 3 is provided with a coolant inlet 31 and a coolant outlet 32 ​​. The coolant enters the manifold 3 from the coolant inlet 31 , and the coolant is discharged from the manifold 3 from the coolant outlet 32 ​​.

[0040] The heat dissipation channel 4 is used for heat exchange with the battery core 5. The heat dissipation channel 4 can be arranged at the bottom or the side of the battery core 5, which is selected according to the actual situation, and this embodiment does not limit this.

[0041] The heat dissipation inlet 41 of the heat dissipation channel 4 is connected to the coolant inlet 31, and the heat dissipation outlet 42 of the heat dissipation channel 4 is connected to the coolant outlet 32. There are at least two heat dissipation channels 4, which are arranged in parallel. In this way, the coolant entering the header 3 from the coolant inlet 31 flows into each heat dissipation channel 4 through the heat dissipation inlet 41. The coolant exchanges heat with the battery cell 5 during the process of flowing through the heat dissipation channel 4, so that the heat dissipation of the battery cell 5 is achieved; then the coolant enters the header 3 from the heat dissipation outlet 42, and finally the coolant is discharged from the header 3 through the coolant outlet 32.

[0042] In the heat dissipation device of the energy storage system provided in the embodiment of the present application, the heat dissipation channels 4 are arranged in parallel. Compared with the existing channels arranged in series, the coolant temperature of the heat dissipation inlet 41 of each heat dissipation channel 4 is the same, and the flow path of the coolant is shortened, thereby reducing the temperature difference of the battery cells at different positions on the coolant flow path, improving the temperature uniformity of the battery cells in the energy storage system, and improving the charging and discharging efficiency and service life of the battery cells 5.

[0043] like Figure 1-3 As shown, in order to facilitate the coolant to enter and exit the collecting pipe 3, the heat dissipation device of the above-mentioned energy storage system also includes a liquid inlet joint 1 and a liquid outlet joint 2, the liquid inlet joint 1 is arranged at the coolant inlet 31, and the liquid inlet joint 1 is connected to the coolant inlet 31; the liquid outlet joint 2 is arranged at the coolant outlet 32, and the liquid outlet joint 2 is connected to the coolant outlet 32.

[0044] The types of the liquid inlet connector 1 and the liquid outlet connector 2 are selected according to actual conditions, and are not limited in this embodiment.

[0045] In the embodiment of the present application, all the heat dissipation channels 4 are located on the same side of the manifold 3, so that the coolant enters and exits on the same side, which facilitates the management of the coolant.

[0046] In order to simplify the structure, the manifold 3 is one. In some embodiments, a partition 34 is provided inside the manifold 3, and the partition 34 divides the tube cavity of the manifold 3 into a liquid inlet cavity 35 and a liquid outlet cavity 36 that are isolated from each other; wherein the cooling liquid inlet 31 and the heat dissipation inlet 41 are both connected to the liquid inlet cavity 35, and the heat dissipation outlet 42 and the cooling liquid outlet 32 ​​are both connected to the liquid outlet cavity 36. In this way, the cooling liquid enters the liquid inlet cavity 35 from the cooling liquid inlet 31, and then enters the heat dissipation channel 4 from the heat dissipation inlet 41; the cooling liquid enters the liquid outlet cavity 36 from the heat dissipation outlet 42, and then discharges the manifold 3 from the cooling liquid outlet 32. In this way, the cooling liquid inlet 31 and the cooling liquid outlet 32 ​​are arranged on the same manifold 3, which facilitates the management of the cooling liquid.

[0047] The size and shape of the liquid inlet cavity 35 and the liquid outlet cavity 36 are selected according to actual conditions, and this embodiment does not limit this.

[0048] like Figure 5 As shown, in order to facilitate the communication between the heat dissipation channel 4 and the manifold 3, the liquid inlet cavity 35 and the liquid outlet cavity 36 can be selected to be distributed in sequence along the vertical direction.

[0049] like Figure 6 As shown, in order to facilitate the installation of the heat dissipation channel 4, the heat dissipation outlet end and the heat dissipation inlet end of the heat dissipation channel 4 can be selected to be arranged at the same height position of the manifold 3. Since the liquid inlet cavity 35 and the liquid outlet cavity 36 are distributed in sequence along the vertical direction, the heat dissipation outlet 42 and the heat dissipation inlet 41 are distributed in sequence along the vertical direction in the heat dissipation channel 4.

[0050] Exemplarily, the liquid inlet cavity 35 is higher than the liquid outlet cavity 36 , and the heat dissipation inlet 41 is higher than the heat dissipation outlet 42 ; or, the liquid inlet cavity 35 is lower than the liquid outlet cavity 36 , and the heat dissipation inlet 41 is lower than the heat dissipation outlet 42 .

[0051] In the above structure, the heat dissipation inlet 41 and the heat dissipation outlet 42 can be selected to perform a half-layer blocking treatment to ensure that the heat dissipation outlet 42 and the heat dissipation inlet 41 in the heat dissipation channel 4 are distributed in sequence along the vertical direction. Of course, other methods can also be used to achieve the heat dissipation outlet 42 and the heat dissipation inlet 41 in the heat dissipation channel 4. The embodiment of the present application does not limit this.

[0052] In the above structure, the heat dissipation channel 4 may be U-shaped, so that all the heat dissipation channels 4 are located on the same side of the manifold 3. Of course, the heat dissipation channel 4 may also be in other shapes, which is not limited in this embodiment.

[0053] In some other embodiments, when all the heat dissipation channels 4 are located on the same side of the manifold 3, the manifold may be selected to include two pipes, and all the heat dissipation channels 4 are located on the same side of the two pipes. In this way, the coolant inlet 31 is arranged in one pipe, and the coolant outlet 32 ​​is arranged in another pipe. The coolant is distributed from one pipe to each heat dissipation channel 4, and the other pipe converges the coolant flowing out of each heat dissipation channel 4.

[0054] In some other embodiments, the manifold 3 may be selected to include two pipes, and all the heat dissipation channels 4 are distributed between the two pipes. In this way, the coolant inlet 31 is set in one pipe, and the coolant outlet 32 ​​is set in another pipe. The coolant is distributed from one pipe to each heat dissipation channel 4, and the other pipe converges the coolant flowing out of each heat dissipation channel 4.

[0055] In the embodiment of the present application, the shape of the manifold 3 is selected according to the actual situation. For example, the cross section of the manifold 3 is quadrilateral, and the cross section is perpendicular to the length direction of the manifold 3. In this way, it is convenient to fix and seal the manifold 3 and the heat dissipation channel 4, and it is also convenient to form a mutually isolated liquid inlet cavity 35 and liquid outlet cavity 36 in the manifold 3.

[0056] The above quadrilateral can be a rectangle or a square, which can be selected according to the actual situation. Of course, the cross section of the header 3 can also be selected to be a circle or other shapes, which is not limited in this embodiment.

[0057] In the embodiment of the present application, the manifold 3 is provided with a connecting port 33, and the heat dissipation outlet and heat dissipation inlet of the heat dissipation channel 4 are both provided at the connecting port 33. The heat dissipation channel 4 can extend into the manifold 3 through the connecting port 33, or can be connected to the connecting port.

[0058] It can be understood that the heat dissipation outlet end and the heat dissipation inlet end of the heat dissipation channel 4 are both fixedly connected and sealed to the collecting pipe 3 .

[0059] In order to facilitate the installation of the heat dissipation channel 4, a slot is provided at the communication port 33 to be engaged with the heat dissipation channel 4. In this way, the heat dissipation channel 4 is engaged with the slot, which prevents the heat dissipation channel 4 from shaking during the process of fixing the heat dissipation channel 4 and the manifold 3, thereby facilitating the fixing of the heat dissipation channel 4 and the manifold 3.

[0060] In actual situations, the heat dissipation channel 4 can also be fixedly connected and sealed to the manifold 3 by being engaged with the card slot, which also facilitates the fixed connection between the heat dissipation channel 4 and the manifold 3.

[0061] In the embodiment of the present application, the heat dissipation channel 4 can be a liquid cooling plate or a heat dissipation pipe. In order to reduce the manufacturing difficulty and manufacturing cost, the heat dissipation channel 4 can be selected as a heat dissipation pipe.

[0062] The heat dissipation pipe can be a harmonica pipe, that is, a microchannel flat pipe. In this way, there is no need to make a complex enhanced heat exchange flow channel design inside the heat dissipation flow channel 4, which effectively reduces the manufacturing difficulty and manufacturing cost while ensuring the heat dissipation effect.

[0063] like Figure 1 As shown, in order to improve the heat exchange efficiency between the heat dissipation channel 4 and the battery cell 5, the heat dissipation device of the energy storage system also includes a heat conductive layer 6, which is arranged on the outer surface of the heat dissipation channel 4, and the heat dissipation channel 4 is used to perform heat exchange with the battery cell 5 through the heat conductive layer 6.

[0064] In order to facilitate the arrangement of the heat-conducting layer 6, the heat-conducting layer 6 can be selected as a heat-conducting pad, which covers all the heat dissipation channels 4. Of course, the heat-conducting layer 6 can also be a coating or other types, which is not limited in the embodiment of the present application.

[0065] It should be noted that the heat conducting layer 6 is located between the heat dissipation channels 4 and the battery core 5 . Exemplarily, when the heat dissipation channels 4 are arranged at the bottom of the battery core 5 , the heat conducting layer 6 is located at the top of all the heat dissipation channels 4 .

[0066] Based on the heat dissipation device of the energy storage system provided in the above embodiment, the embodiment of the present application also provides an energy storage system. Figure 1-Figure 3 As shown, the energy storage system includes a battery cell 5 and the heat dissipation device of the energy storage system described in the above embodiment.

[0067] In the above energy storage system, there are multiple battery cells 5. In order to improve the heat dissipation effect, the battery cells 5 can be arranged in rows, and the battery cells 5 are at least two rows, each row of battery cells 5 includes at least one battery cell 5, and each row of battery cells 5 corresponds to the same heat dissipation channel 4, that is, each row of battery cells 5 dissipates heat through the same heat dissipation channel 4.

[0068] In actual situations, the battery cells 5 may also be distributed on the heat dissipation channel 4 in other ways, which is not limited in the embodiments of the present application.

[0069] Since the heat dissipation device of the energy storage system provided in the above embodiment has the above technical effect, and the above energy storage system includes the heat dissipation device of the energy storage system provided in the above embodiment, the above energy storage system also has the corresponding technical effect, which will not be repeated here.

[0070] The type of the energy storage system and the specific application scenario are selected according to actual conditions, and this embodiment does not limit this.

[0071] The technical features mentioned above can be combined with each other arbitrarily, as long as the combined technical features are not contradictory. All feasible feature combinations are technical contents explicitly recorded in this article.

[0072] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heat dissipation device for an energy storage system, characterized in that: It includes a collecting pipe and a heat dissipation channel, wherein the collecting pipe is provided with a coolant inlet and a coolant outlet; the heat dissipation channel is used for heat exchange with the battery cell, the heat dissipation inlet of the heat dissipation channel is connected with the coolant inlet, the heat dissipation outlet of the heat dissipation channel is connected with the coolant outlet, and there are at least two heat dissipation channels which are arranged in parallel.

2. The heat dissipation device of the energy storage system according to claim 1, characterized in that: All of the heat dissipation channels are located on the same side of the header.

3. The heat dissipation device of the energy storage system according to claim 2, characterized in that: A partition is arranged inside the collecting tube, and the partition divides the tube cavity of the collecting tube into a liquid inlet cavity and a liquid outlet cavity which are isolated from each other; wherein the cooling liquid inlet and the heat dissipation inlet are both connected to the liquid inlet cavity, and the heat dissipation outlet and the cooling liquid outlet are both connected to the liquid outlet cavity.

4. The heat dissipation device of the energy storage system according to claim 3, characterized in that: The liquid inlet chamber and the liquid outlet chamber are distributed in sequence along the vertical direction.

5. The heat dissipation device of the energy storage system according to claim 4, characterized in that: The heat dissipation outlet and the heat dissipation inlet of the heat dissipation channel are arranged at the same height position of the collecting pipe, and the heat dissipation outlet and the heat dissipation inlet are distributed in sequence along the vertical direction in the heat dissipation channel.

6. The heat dissipation device of the energy storage system according to claim 2, characterized in that: The heat dissipation channel is U-shaped.

7. The heat dissipation device of the energy storage system according to claim 1, characterized in that: The cross-section of the collecting tube is quadrilateral, and the cross-section is perpendicular to the length direction of the collecting tube; and / or the collecting tube is provided with a connecting port, and the heat dissipation outlet end and the heat dissipation inlet end of the heat dissipation channel are both arranged at the connecting port, and the connecting port is provided with a card slot connected to the heat dissipation channel.

8. The heat dissipation device of the energy storage system according to claim 1, characterized in that: The heat dissipation channel is a heat dissipation pipe.

9. The heat dissipation device of the energy storage system according to claim 8, characterized in that: The heat dissipation channel is a harmonica tube.

10. The heat dissipation device of the energy storage system according to claim 1, characterized in that: It also includes a heat-conducting layer, which is arranged on the outer surface of the heat-dissipating channel. The heat-dissipating channel is used for heat exchange between the heat-conducting layer and the battery core.

11. The heat dissipation device of the energy storage system according to any one of claims 1 to 10, characterized in that: It also includes a liquid inlet joint and a liquid outlet joint, wherein the liquid inlet joint is arranged at the coolant inlet, and the liquid inlet joint is communicated with the coolant inlet; the liquid outlet joint is arranged at the coolant outlet, and the liquid outlet joint is communicated with the coolant outlet.

12. An energy storage system, characterized in that: include: A battery cell, and a heat dissipation device for an energy storage system as claimed in any one of claims 1 to 11.

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