Bottom side plate liquid cooling device and energy storage system

Abstract

The utility model relates to the technical field of energy storage, in particular to a bottom side plate liquid cooling device and an energy storage system.The bottom side plate liquid cooling device comprises an upper plate and a lower plate, the upper plate and the lower plate are bonded to form a bottom cooling plate, and a first circulation channel is formed in the bottom cooling plate; the side cooling plates are perpendicular to the bottom cooling plate and are distributed in parallel at equal intervals in the width direction of the bottom cooling plate; the connecting pipelines are arranged between the side cold plates and the bottom cold plate, the connecting pipelines are connected with the bottom cold plate and the two sets of side cold plates located at the ends, and the connecting pipelines are connected with the two adjacent sets of side cold plates; the connecting pipeline is provided with a first vertical section and a second vertical section, the first vertical section is provided with a total liquid inlet, the second vertical section is provided with a total liquid outlet, the temperature control effect on the energy storage system is improved, and the flowing performance of cooling liquid is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of energy storage, and particularly relates to a bottom side plate liquid cooling device and an energy storage system. BACKGROUND

[0002] Energy storage cells help realize efficient use and clean transformation of energy by storing and releasing electric energy. In the fields of electric vehicles, household energy storage and renewable energy, energy storage cells play a key role in promoting efficient use and clean transformation of energy.

[0003] At present, the development and application difficulties of energy storage cells are mostly concentrated in the control of energy density and thermal management. The control of energy density is at the material level, and is limited by the development of material technology, so that the thermal management technology of energy storage cells has developed vigorously.

[0004] For the existing thermal management of energy storage cells, the original control principle, i.e. heat exchange, is still adopted to control the working temperature of the cells through the heat exchange mode to prevent the explosion and fire hazards caused by thermal runaway of energy storage cells. However, the existing energy storage cell heat exchange mostly has the problem of insufficient heat exchange area, which leads to the inability to quickly and evenly cool the energy storage cells in extreme conditions. In addition, the inlet and outlet of the liquid are arranged on the bottom plate, which makes the flow of the cooling liquid not very smooth. CONTENT OF THE INVENTION

[0005] The application aims to provide a bottom side plate liquid cooling device and an energy storage system to solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the application provides the following technical scheme:

[0007] A bottom side plate liquid cooling device comprises:

[0008] an upper plate and a lower plate, the upper plate and the lower plate are bonded to form a bottom cooling plate, and a first flow channel is arranged in the bottom cooling plate;

[0009] a side cooling plate, which is perpendicular to the bottom cooling plate and is arranged in multiple groups, and the multiple groups of side cooling plates are equidistantly and parallelly distributed along the width direction of the bottom cooling plate;

[0010] a connecting pipeline, which is arranged between the side cooling plate and the bottom cooling plate, connects the bottom cooling plate and two groups of side cooling plates located at the end, and connects two adjacent groups of side cooling plates; the connecting pipeline is provided with a first vertical section and a second vertical section, a total liquid inlet is arranged on the first vertical section, and a total liquid outlet is arranged on the second vertical section.

[0011] As a further scheme of the present application, the upper plate and the lower plate are made of aluminum material, and the upper plate is provided with a first liquid inlet and a first liquid outlet, and the cooling liquid enters the first flow channel through the first liquid inlet from the total liquid inlet of the connecting pipeline and flows out to the total liquid outlet of the connecting pipeline through the first liquid outlet.

[0012] As a further scheme of the present application, the first flow channel includes a first inflow channel and a first outflow channel formed between the upper plate and the lower plate, and the cooling liquid entering the first inflow channel from the first liquid inlet flows to the first outflow channel and then flows to the first liquid outlet.

[0013] As a further scheme of the present application, the first inflow channel and the first outflow channel are both composed of a plurality of channels arranged side by side.

[0014] As a further scheme of the present application, the side cooling plate is provided with a second flow channel, and the second flow channel includes a second inflow channel and a second outflow channel, and the second inflow channel is in communication with the second outflow channel.

[0015] As a further scheme of the present application, the second inflow channel is located above the second outflow channel.

[0016] As a further scheme of the present application, the second inflow channel and the second outflow channel are both composed of a plurality of channels arranged side by side.

[0017] As a further scheme of the present application, the connecting pipeline includes two groups of side-bottom connecting pipelines arranged symmetrically, one end of each group of the side-bottom connecting pipelines is connected to the first liquid inlet and the first liquid outlet respectively, and the other end is connected to the side cooling plate.

[0018] As a further scheme of the present application, one side of the side cooling plate is provided with a second liquid inlet in communication with the second inflow channel, and the other side is provided with a second liquid outlet in communication with the second outflow channel; the connecting pipeline further includes a side connecting pipeline connecting adjacent two groups of the side cooling plates, one end of the side connecting pipeline is connected to the second liquid outlet on one group of the side cooling plates, and the other end is connected to the second liquid inlet on the other group of the side cooling plates.

[0019] In addition, the present application also provides an energy storage system including the bottom-side plate liquid cooling device as described above, and the energy storage system further includes:

[0020] a plurality of groups of battery cells, each group of the battery cells is arranged along the length and width directions of the bottom cooling plate;

[0021] a first aluminum bar connecting two groups of the battery cells arranged along the length direction of the bottom cooling plate;

[0022] The second aluminum bar is connected to two groups of adjacent battery cells arranged along the width direction of the bottom cooling plate.

[0023] Compared with the prior art, the application has the following advantages:

[0024] The bottom cooling plate is arranged to realize heat exchange between the bottom cooling plate and the cooling liquid, so as to reduce the temperature of the bottom cooling plate, so that the bottom cooling plate can exchange heat with the battery cell again, thereby reducing the temperature of the battery cell, so that the battery cell can work at a relatively stable working temperature, and thermal runaway is avoided.

[0025] The vertical section of the connecting pipeline is arranged, and the liquid inlet and the liquid outlet are arranged on the vertical section, so that the cooling liquid can flow to the bottom plate and the side plate more smoothly.

[0026] The side cooling plate is arranged, so that the cooling liquid can move from top to bottom in the second inflow channel after entering the second inflow channel through the second liquid inlet, so that the upper part of the battery cell with a relatively high working temperature can obtain better heat exchange effect, and the temperature uniformity of the battery cell is improved.

[0027] The combination of the bottom cooling plate and the side cooling plate can realize cooling of the bottom and side of the battery cell, which not only can expand the heat exchange area and realize better heat exchange effect to reduce the working temperature of the battery cell, but also can fix each column of battery cells through the connection of multiple groups of side cooling plates, and improve the structural strength of the energy storage system. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The structure diagram of one embodiment of the energy storage system.

[0029] Figure 2 The structure diagram of one embodiment of the energy storage system. Figure 1 The structure diagram of one embodiment of the energy storage system.

[0030] Figure 3 The structure diagram of one embodiment of the energy storage system.

[0031] Figure 4 The structure diagram of one embodiment of the energy storage system. Figure 3 The structure diagram of one embodiment of the energy storage system.

[0032] Figure 5 The structure diagram of one embodiment of the energy storage system.

[0033] Figure 6 The structure diagram of one embodiment of the energy storage system.

[0034] Figure 7 The structure diagram of one embodiment of the energy storage system.

[0035] Figure 8Structure diagram of side-bottom connecting pipe in one embodiment of the bottom-side plate liquid cooling device.

[0036] Figure 9 Structure diagram of side connecting pipe in one embodiment of the bottom-side plate liquid cooling device.

[0037] In the figure: 1, bottom cooling plate; 101, upper plate; 1011, first liquid inlet; 1012, first liquid outlet; 102, lower plate; 1021, first inflow channel; 1022, first outflow channel; 2, side cooling plate; 201, second liquid inlet; 202, second liquid outlet; 203, second inflow channel; 204, second outflow channel; 3, side-bottom connecting pipe; 4, side connecting pipe; 5, battery cell; 6, first aluminum bar; 7, second aluminum bar; 31, first vertical section; 32, second vertical section; 311, total liquid inlet; 321, total liquid outlet. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0039] In addition, the elements in the present application are referred to as "fixed to" or "provided on" another element, which can be directly on another element or can have a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or can have a middle element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0040] Please refer to Figures 1-9 In the embodiments of the present application, a bottom-side plate liquid cooling device includes a bottom cooling plate 1, a side cooling plate 2 and a connecting pipe.

[0041] The bottom cooling plate 1 is formed by bonding the upper plate 101 and the lower plate 102, which cancels the high-temperature brazing process, reduces the production energy consumption, and after the adhesive is coated, it will not flow again, making the bonding of the upper and lower plates more uniform, avoiding problems such as uneven flow of brazing filler metal or local welding failure, and improving the temperature uniformity of the battery cell.

[0042] The bottom cooling plate 1 has a first flow channel inside. The upper plate 101 and the lower plate 102 are made of aluminum. The upper plate 101 has a first liquid inlet 1011 and a first liquid outlet 1012. The coolant enters the first flow channel through the first liquid inlet 1011 and flows out through the first liquid outlet 1012.

[0043] The first flow channel includes a first inflow channel 1021 and a first outflow channel 1022 formed between the upper plate 101 and the lower plate 102. Specifically, the lower plate 102 is stamped with grooves for coolant flow, so that the first inflow channel 1021 and the first outflow channel 1022 can be formed after the upper plate 101 and the lower plate 102 are bonded together. The coolant entering the first inflow channel 1021 from the first inlet 1011 can flow to the first outlet 1012 through the first outflow channel 1022. Pipe fittings can be installed on the first inlet 1011 and the first outlet 1012. Both the first inflow channel 1021 and the first outflow channel 1022 are composed of multiple parallel channels.

[0044] It should be noted that the first inflow channel 1021 and the first outflow channel 1022 are uniformly and symmetrically distributed elliptical channels, and each of the first inflow channel 1021 and the first outflow channel 1022 is composed of four elliptical branches, and the branches of the first inflow channel 1021 and the first outflow channel 1022 are symmetrically distributed.

[0045] During use, the battery cell 5 generates heat and transfers the heat generated to the bottom cooling plate 1, causing the temperature of the bottom cooling plate 1 to rise. Meanwhile, the coolant enters the first inlet 1011 and flows into the first inflow channel 1021, and can flow out through the first outflow channel 1022 and the first outlet 1012, thereby realizing heat exchange between the bottom cooling plate 1 and the coolant to reduce the temperature of the bottom cooling plate 1. This allows the bottom cooling plate 1 to exchange heat with the battery cell 5 again, further reducing the temperature of the battery cell 5, so that the battery cell 5 can be kept at a relatively stable operating temperature and thermal runaway can be avoided.

[0046] Furthermore, when the coolant flows through the first inflow channel 1021 and the first outflow channel 1022, the coolant can move through the branches of the first inflow channel 1021 and the first outflow channel 1022, thereby ensuring that the coolant can have a more uniform heat exchange with the bottom cooling plate 1, so as to further improve the heat exchange effect.

[0047] Please see Figures 1-7 The side cold plate 2 is perpendicular to the bottom cold plate 1 and is provided in multiple sets. The multiple sets of side cold plates 2 are equidistant and parallel along the width direction of the bottom cold plate 1. It should be noted that the side cold plate 2 is composed of two layers of composite aluminum plates that are brazed from top to bottom.

[0048] The side cold plate 2 is provided with a second flow passage, which comprises a second inflow passage 203 and a second outflow passage 204, the second inflow passage 203 communicates with the second outflow passage 204; the second inflow passage 203 is located above the second outflow passage 204. The second inflow passage 203 and the second outflow passage 204 are both composed of a plurality of passages arranged side by side.

[0049] The side cold plate 2 is provided with a second inflow passage 203 and a second outflow passage 204, the second inflow passage 203 communicates with the second outflow passage 204; the second inflow passage 203 is located above the second outflow passage 204. The second inflow passage 203 and the second outflow passage 204 are both composed of a plurality of passages arranged side by side.

[0050] It should be further pointed out that the second inflow passage 203 and the second outflow passage 204 are also uniformly and symmetrically distributed elliptical flow channels, and the second inflow passage 203 and the second outflow passage 204 are both composed of four elliptical inflow branches, and the branches of the second inflow passage 203 and the second outflow passage 204 are symmetrically arranged.

[0051] During installation, it should be ensured that the second inflow passage 203 is located above the second outflow passage 204, so that the cooling liquid entering the second inflow passage 203 from the second inflow port 201 can move from top to bottom, so that the upper part of the battery cell 5 with relatively higher working temperature can obtain better heat exchange effect, and the temperature uniformity of the battery cell 5 is improved.

[0052] Please refer to Figure 1 、 Figure 2 、 Figure 4 、 Figure 8 、 Figure 9 , the connecting pipeline is arranged between the side cold plate 2 and the bottom cold plate 1, the connecting pipeline can connect the bottom cold plate 1 with two groups of side cold plates 2 located at the end, and the connecting pipeline can connect adjacent two groups of side cold plates 2;

[0053] The connecting pipeline comprises two groups of side-bottom connecting pipes 3 arranged symmetrically, one end of each of the two groups of side-bottom connecting pipes 3 is connected with the first inflow port 1011 and the first outflow port 1012 respectively, and the other end is connected with the side cold plate 2;

[0054] The connecting pipeline further comprises a side connecting pipe 4 connecting adjacent two groups of side cold plates 2, one end of the side connecting pipe 4 is connected with the second outflow port 202 of one of the two groups of side cold plates 2, and the other end is connected with the second inflow port 201 of the other group of side cold plates 2.

[0055] The connecting pipeline is provided with a first vertical section 31 and a second vertical section 32, the first vertical section 31 is provided with a total inflow port 311, and the second vertical section 32 is provided with a total outflow port 321.

[0056] In detail, in use, the cooling liquid is pumped into one of the groups of side-bottom connecting pipes 3, which are in communication with the first liquid inlet 1011 and the second liquid inlet 201, so that the cooling liquid can enter into the bottom cooling plate 1 and the side cooling plate 2 from the first liquid inlet 1011 and the second liquid inlet 201 respectively, and exchange heat with the bottom cooling plate 1 and the side cooling plate 2, so as to take away the heat on the bottom cooling plate 1 and the side cooling plate 2, and cool the bottom cooling plate 1 and the side cooling plate 2, and make the bottom cooling plate 1 and the side cooling plate 2 better exchange heat with the battery cell 5, and improve the temperature control effect on the battery cell 5.

[0057] Further, since the groups of side cooling plates 2 are arranged in parallel, when the cooling liquid enters into one of the groups of side cooling plates 2 and flows out from the second liquid outlet 202 of the group of side cooling plates 2, the cooling liquid can also enter into the second liquid inlet 201 of the adjacent side cooling plate 2 through the side connecting pipe 4, and then enter into the second inflow channel 203 from the second liquid inlet 201 and move from top to bottom, so as to ensure that the flow direction of the cooling liquid in each side cooling plate 2 is consistent.

[0058] The cooling liquid flowing into the bottom cooling plate 1 and the side cooling plate 2 will finally flow into another group of side-bottom connecting pipes 3 from the first liquid outlet 1012 and the second liquid outlet 202, and flow out from the group of side-bottom connecting pipes 3, and under the circulation pumping of the pumping device (not shown in the figure), the circulation of the cooling liquid can be realized.

[0059] Please refer to Figure 1 、 Figure 3 As an embodiment of the present application, a battery energy storage system is also provided, which comprises the bottom-side plate liquid cooling device, and further comprises:

[0060] A plurality of groups of battery cells 5, which are arranged along the length and width directions of the bottom cooling plate 1 respectively;

[0061] A first aluminum bar 6, which connects two groups of battery cells 5 arranged along the length direction of the bottom cooling plate 1 and adjacent to each other;

[0062] A second aluminum bar 7, which connects two groups of battery cells 5 arranged along the width direction of the bottom cooling plate 1 and adjacent to each other.

[0063] The first aluminum bar 6 and the second aluminum bar 7 can make the connection between the groups of battery cells 5 more stable, and the side cooling plate 2 can be arranged between the two adjacent groups of battery cells 5, so as to increase the heat exchange area of the battery cell 5.

[0064] With the above configuration, the bottom and sides of the battery cell 5 can be cooled by the cooperation of the bottom cooling plate 1 and multiple sets of side cooling plates 2. This not only expands the heat exchange area and achieves better heat exchange effect to reduce the operating temperature of the battery cell 5, but also fixes each row of battery cells 5 well by connecting multiple sets of side cooling plates 2, thereby improving the structural strength of the energy storage system.

[0065] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0066] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A bottom side plate liquid cooling device, characterized in that, include: An upper plate (101) and a lower plate (102) are bonded together to form a bottom cooling plate (1), and a first flow channel is provided inside the bottom cooling plate (1). Side cold plates (2) are perpendicular to the bottom cold plate (1) and multiple sets are provided. The multiple sets of side cold plates (2) are equidistant and parallel along the width direction of the bottom cold plate (1). A connecting pipe is provided between the side cooling plate (2) and the bottom cooling plate (1). The connecting pipe connects the bottom cooling plate (1) to the two sets of side cooling plates (2) located at the ends. The connecting pipe connects two adjacent sets of side cooling plates (2). The connecting pipe is provided with a first vertical section (31) and a second vertical section (32). A total liquid inlet (311) is provided on the first vertical section (31), and a total liquid outlet (321) is provided on the second vertical section (32).

2. The bottom side plate liquid cooling device according to claim 1, characterized in that, The upper plate (101) and lower plate (102) are made of aluminum. The upper plate (101) is provided with a first liquid inlet (1011) and a first liquid outlet (1012). The coolant enters through the main liquid inlet (311) of the connecting pipe and enters the first flow channel through the first liquid inlet (1011), and flows out through the first liquid outlet (1012) to the main liquid outlet (321) of the connecting pipe.

3. The bottom side plate liquid cooling device according to claim 2, characterized in that, The first flow channel includes a first inflow channel (1021) and a first outflow channel (1022) formed between the upper plate (101) and the lower plate (102). Coolant entering the first inflow channel (1021) from the first inlet (1011) flows to the first outlet (1012) through the first outflow channel (1022).

4. The bottom side plate liquid cooling device according to claim 3, characterized in that, Both the first inflow channel (1021) and the first outflow channel (1022) are composed of multiple parallel channels.

5. A bottom side plate liquid cooling device according to claim 3, characterized in that, A second flow channel is formed in the side cold plate (2), the second flow channel includes a second inflow channel (203) and a second outflow channel (204), the second inflow channel (203) and the second outflow channel (204) are connected.

6. The bottom side plate liquid cooling device according to claim 5, characterized in that, The second inflow channel (203) is located above the second outflow channel (204).

7. A bottom side plate liquid cooling device according to claim 6, characterized in that, Both the second inflow channel (203) and the second outflow channel (204) consist of multiple parallel channels.

8. The bottom side plate liquid cooling device according to claim 3, characterized in that, The connecting pipeline includes two sets of side bottom connecting pipes (3) arranged symmetrically. One end of each set of side bottom connecting pipes (3) is connected to the first liquid inlet (1011) and the first liquid outlet (1012), respectively, and the other end is connected to the side cold plate (2).

9. A bottom side plate liquid cooling device according to claim 5, characterized in that, The side cooling plate (2) has a second liquid inlet (201) communicating with the second inflow channel (203) on one side and a second liquid outlet (202) communicating with the second outflow channel (204) on the other side; the connecting pipeline also includes a side connecting pipe (4) connecting two adjacent sets of the side cooling plates (2), one end of the side connecting pipe (4) is connected to the second liquid outlet (202) on one set of the side cooling plates (2), and the other end is connected to the second liquid inlet (201) on the other set of the side cooling plates (2).

10. An energy storage system, characterized in that, The energy storage system includes the bottom side plate liquid cooling device as described in any one of claims 1-9, and further includes: Multiple sets of battery cells (5) are arranged along the length and width of the bottom cooling plate (1); The first aluminum bar (6) connects two adjacent sets of battery cells (5) arranged along the length direction of the bottom cold plate (1); The second aluminum bar (7) connects two adjacent sets of battery cells (5) arranged along the width direction of the bottom cold plate (1).

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