Battery support plate, battery pack and energy storage system

Abstract

The utility model provides a battery support plate, a battery pack and an energy storage system, the support plate is used for being arranged between the maximum surfaces of adjacent single batteries, the surface of the support plate close to the single batteries is provided with a groove, the groove is used for defining a channel for air circulation with the maximum surfaces of the single batteries, and the maximum surfaces of the single batteries are communicated with the groove. And a cooling liquid flow channel is formed in the supporting plate. According to the battery supporting plate, the cooling effect is good, so that the structure of a battery pack is compact, the capacity of the battery pack is improved, and the energy density is high.

Description

Technical Field

[0001] The utility model generally relates to the technical field of batteries, and more specifically to a battery support plate, a battery pack and an energy storage system. Background Art

[0002] At present, in the battery pack in the prior art, the module box structure and the cooling structure occupy a large space in the package, resulting in low system volume utilization and low volume energy density. Utility Model Content

[0003] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0004] In order to at least partially solve the above-mentioned problems, the first aspect of the utility model provides a battery support plate, which is used to be arranged between the largest surfaces of adjacent single cells, and the support plate is provided with a groove on the surface close to the single cell, and the groove is used to define a channel for air circulation with the largest surface of the single cell, and a coolant flow channel is provided inside the support plate.

[0005] According to the battery support plate of the first aspect of the utility model, the support plate arranged between the single cells is provided with grooves and coolant flow channels, so as to effectively cool the largest surface of the single cell. The support plate is arranged between the largest surfaces of the single cells, and the structure is compact. The support plate integrates the structure of cooling and installing the single cells, which reduces the space occupied by the battery pack other than the single cells, thereby improving the capacity of the battery pack and having high energy density.

[0006] Optionally, the groove extends along the second horizontal direction, the support plate is provided with a plurality of the grooves, and the plurality of the grooves are arranged along the first horizontal direction.

[0007] Optionally, the coolant flow channel extends along the second horizontal direction, the support plate is provided with a plurality of the coolant flow channels, and the plurality of the coolant flow channels are arranged along the first horizontal direction.

[0008] Optionally, along the first horizontal direction, the grooves and the coolant channels are arranged alternately.

[0009] Optionally, the groove and / or the coolant flow channel extends in an S shape.

[0010] A second aspect of the present invention provides a battery pack, characterized in that the battery pack comprises:

[0011] A plurality of single cells, each of which has a maximum surface, and the plurality of single cells are arranged at intervals along a height direction, wherein the height direction is perpendicular to the maximum surface; and

[0012] According to the above-mentioned battery support plate, the support plate is perpendicular to the height direction and is arranged between adjacent single cells, a groove is arranged on the surface of the support plate close to the single cell, the groove and the single cell define a channel for air circulation, and a coolant flow channel is arranged inside the support plate.

[0013] According to the battery pack of the first aspect of the utility model, the support plate arranged between the single cells is provided with grooves and coolant flow channels, so as to effectively cool the largest surface of the single cell, and the support plate is arranged between the largest surfaces of the single cell in the height direction, with a compact structure, and the support plate integrates the structure of cooling and installing the single cell, reducing the space occupied by the battery pack other than the single cell, thereby improving the capacity of the battery pack and having high energy density.

[0014] Optionally, the battery pack further includes a side sealing guide frame, which is disposed between the support plates along the height direction, and the side sealing guide frame and the support plates define a receiving space for receiving the single battery.

[0015] Optionally, the side sealing guide frame includes a first chamber and a second chamber, wherein the first chamber is used to accommodate and connect the single battery; the side sealing guide frame also includes an exhaust hole, which is arranged between the first chamber and the second chamber.

[0016] Optionally, the single battery is provided with a first explosion-proof valve, and the first explosion-proof valve is aligned with the exhaust hole.

[0017] Optionally, the battery pack further includes a side frame bar, which is arranged at the end of the side seal guide frame, a partition groove is arranged inside the side frame bar, the second chamber of the side seal guide frame is connected to the partition groove, and a second explosion-proof valve is arranged in the partition groove.

[0018] Optionally, the separation groove corresponds to the second chamber connected to at least one of the side seal guide frames; and / or

[0019] The detonation pressure of the second explosion-proof valve is not greater than the detonation pressure of the first explosion-proof valve.

[0020] Optionally, the side sealing guide frame is provided with a heat insulating and fireproof coating.

[0021] Optionally, the battery pack further includes a structural adhesive, and the structural adhesive is disposed between the side seal guide frame and the support plate.

[0022] Optionally, the sum of the volumes of the plurality of single cells is at least half of the volume of the battery pack.

[0023] Optionally, the plurality of single cells are arranged along a first horizontal direction parallel to the largest surface.

[0024] A third aspect of the present invention provides an energy storage system, comprising a battery pack and a box according to the above, wherein the battery pack is located in the box.

[0025] The energy storage system according to the third aspect of the utility model has good cooling effect, compact structure, high energy density, and can be installed in a modular manner.

[0026] Optionally, the volume of the battery pack is at least 54% of the volume of the box.

[0027] Optionally, the sum of the areas of all the single batteries on the horizontal plane projected onto the support plate along the height direction is 52% to 88% of the bottom area of ​​the box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The following drawings of the embodiments of the present invention are used as part of the present invention for understanding the present invention. The drawings show the embodiments of the present invention and their descriptions, and are used to explain the principles of the present invention. In the drawings,

[0029] Figure 1 A three-dimensional schematic diagram of a battery pack according to a preferred embodiment of the present utility model;

[0030] Figure 2 is a three-dimensional schematic diagram of a support plate;

[0031] Figure 3 It is a schematic diagram of the connection between the side seal guide frame and the single battery;

[0032] Figure 4 is a three-dimensional schematic diagram of a side frame strip; and

[0033] Figure 5 It is a three-dimensional schematic diagram of a battery pack according to another preferred embodiment of the present invention.

[0034] Description of Reference Numerals

[0035] 100: Single battery 101: First explosion-proof valve

[0036] 110: Support plate 111: Groove

[0037] 112: Coolant channel 120: Side seal guide frame

[0038] 121: First chamber 122: Second chamber

[0039] 123: Exhaust hole 130: Side frame strip

[0040] 131: Separation groove 132: Second explosion-proof valve

[0041] 140: Control system D1: Height direction

[0042] D2: First horizontal direction D3: Second horizontal direction DETAILED DESCRIPTION

[0043] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.

[0044] In this document, ordinal numbers such as "first" and "second" cited in the present invention are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of the "second component", and the term "second component" itself does not imply the existence of the "first component".

[0045] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0046] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0047] Unless otherwise stated, the numerical ranges herein include not only the entire range within its two endpoints but also include several sub-ranges contained therein.

[0048] Figure 1 and Figure 2 A battery support plate 110 according to the utility model is shown. The support plate 110 is used to be arranged between the maximum surfaces of adjacent single cells 100. A groove 111 is arranged on the surface of the support plate 110 close to the single cell 100. The groove 111 is used to define a channel for air circulation with the maximum surface of the single cell 100. A coolant flow channel 112 is arranged inside the support plate 110.

[0049] According to the battery support plate 110 of the utility model, the support plate 110 arranged between the single cells 100 is provided with a groove 111 and a coolant flow channel 112, so as to effectively cool the largest surface of the single cell 100, and the support plate 110 is arranged between the largest surfaces of the single cell 100, and the structure is compact, and the support plate 110 integrates the structure of cooling and installing the single cell 100, reducing the space occupied by the part of the battery pack other than the single cell 100, thereby improving the capacity of the battery pack, and the energy density is high.

[0050] Figure 1 A battery pack according to the present invention is shown, and the battery pack includes a plurality of single cells 100 and a support plate 110. The single cell 100 is provided with a maximum face, and the plurality of single cells 100 are arranged at intervals along a height direction D1, and the height direction D1 is perpendicular to the maximum face. The support plate 110 is perpendicular to the height direction D1 and is arranged between adjacent single cells 100, and a groove 111 is provided on the surface of the support plate 110 close to the single cell 100, and the groove 111 and the single cell 100 define a channel for air circulation, and a coolant flow channel 112 is provided inside the support plate 110.

[0051] According to the battery pack of the present invention, the support plate 110 arranged between the single cells 100 is provided with a groove 111 and a coolant flow channel 112, so as to effectively cool the largest surface of the single cell 100, and the support plate 110 is arranged between the largest surfaces of the single cell 100 along the height direction D1, and the structure is compact. The support plate 110 integrates the structure of cooling and installing the single cell 100, which reduces the space occupied by the battery pack other than the single cell 100, thereby improving the capacity of the battery pack and having high energy density.

[0052] Alternatively, if Figure 1 As shown, a battery pack according to the present invention includes a plurality of support plates 110. Along the height direction D1, each support plate 110 is correspondingly arranged below each single battery 100, and a plurality of support plates 110 (except the lowest support plate 110) are arranged between two adjacent single batteries 100, so that the support plates 110 can cool and dissipate heat for the single batteries 100 located on both sides of the support plates 110 along the height direction D1.

[0053] Optionally, refer to Figure 1 and Figure 2 The groove 111 on the support plate 110 extends along the second horizontal direction D3, and the support plate 110 is provided with a plurality of grooves 111, and the plurality of grooves 111 are arranged along the first horizontal direction D2, so that the single battery 100 can be evenly cooled.

[0054] Optionally, refer to Figure 1 and Figure 2The support plate 110 is provided with a plurality of cooling liquid channels 112, which are arranged along a first horizontal direction D2, and the cooling liquid channels extend along a second horizontal direction D3 and penetrate the support plate 110, so that the cooling liquid can flow in the support plate 110 through the cooling liquid channels 112, thereby fully cooling the single battery 100.

[0055] Optionally, the projection of the groove 111 along the height direction D1 on the support plate 110 can be a straight line, which is convenient for processing. The projection of the groove 111 along the height direction D1 on the support plate 110 can also be S-shaped, thereby increasing the contact area between the support plate 110 and the air and enhancing the heat dissipation effect of the support plate 110 on the single battery 100.

[0056] Optionally, the projection of the coolant flow channel 112 on the support plate 110 along the height direction D1 can be a straight line, which is convenient for processing. The projection of the coolant flow channel 112 on the support plate 110 along the height direction D1 can also be S-shaped, thereby increasing the contact area between the support plate 110 and the coolant and enhancing the heat dissipation effect of the support plate 110 on the single battery 100.

[0057] Reference Figure 1 According to the utility model, the battery pack further includes a side sealing guide frame 120, which extends along the second horizontal direction D3. Along the height direction D1, the side sealing guide frame 120 is arranged between adjacent support plates 110, so that the side sealing guide frame 120 and the support plate 110 define a receiving space for receiving the single battery 100, so that the single battery 100 is received in the closed receiving space.

[0058] Optionally, the side sealing guide frame 120 is provided with a heat-insulating and fire-proof coating, which is an isolation layer and has the functions of heat insulation and fire isolation. When high-temperature flames, smoke or airflow enters the side sealing guide frame 120, the heat-insulating and fire-proof coating can prevent heat from being transferred to other single cells 100 and components.

[0059] Optionally, the battery pack further includes a structural adhesive, which is disposed between the side sealing guide frame 120 and the support plate 110, so as to seal the side sealing guide frame 120 and the support plate 110. The structural adhesive may be aerogel, thermally conductive structural adhesive or thermal insulation cotton.

[0060] Figure 3 The specific structure of the side seal guide frame 120 and the connection method with the single battery 100 are shown. Figure 3The side sealing guide frame 120 includes a first chamber 121 and a second chamber 122. The first chamber 121 is opposite to the side of the single cell 100. The first chamber 121 is used to accommodate and connect the single cell 100, and the second chamber 122 is located on the side of the first chamber 121 away from the single cell 100 along the first horizontal direction D2. The side sealing guide frame 120 also includes an exhaust hole 123, which is arranged between the first chamber 121 and the second chamber 122. Specifically, the exhaust hole 123 is opened on the side wall between the first chamber 121 and the second chamber 122, so that the first chamber 121 and the second chamber 122 are connected together, so that the high-temperature gas in the first chamber 121 can be guided into the second chamber 122, reducing the pressure in the first chamber 121, and at the same time delaying the flow path of the high-temperature gas, consuming the instantaneous pressure of the high-temperature airflow, and appropriately reducing the temperature of the airflow, playing a cooling and buffering role. A first explosion-proof valve 101 is provided on the side of the single cell 100, and along the second horizontal direction D3, the first explosion-proof valve 101 is aligned with the exhaust hole 123, so that the high-temperature airflow generated by the thermal runaway of the single cell 100 can enter the second chamber 122, thereby slowing down the thermal runaway of the single cell 100. Furthermore, the side sealing guide frame 120 includes a plurality of exhaust holes 123, and the single cell 100 is provided with a plurality of first explosion-proof valves 101 corresponding to the exhaust holes 123, so that the high-temperature gas generated by multiple parts of the single cell 100 can be effectively guided to the second chamber 122 for dispersion and buffering.

[0061] Further, see Figure 1 and Figure 4 The battery pack further includes a side frame bar 130, which is arranged at the end of the side seal guide frame 120 and extends along the height direction D1, and a partition groove 131 is arranged inside the side frame bar 130. The end of the side seal guide frame 120 is inserted into the partition groove 131 of the side frame bar 130, so that the second chamber 122 is connected to the partition groove 131, and a second explosion-proof valve 132 is arranged in the partition groove 131, so that the high-temperature airflow in the second chamber 122 can enter the partition groove 131 and be discharged through the second explosion-proof valve 132. The setting of the partition groove 131 can make the single cells 100 of different heights have a certain separation effect, preventing the thermal runaway of the single cell 100 from spreading to other single cells 100.

[0062] For details, refer to Figure 4The side frame bar 130 includes a plurality of partition grooves 131, and the plurality of partition grooves 131 are arranged along the height direction D1. The partition grooves 131 may be selected to correspond to the second chamber 122 connected to a side sealing guide frame 120, and the partition grooves 131 may also correspond to the second chambers 122 connected to a plurality of side sealing guide frames 120, so that the discharge channel of the high-temperature airflow generated by the single battery 100 arranged along the height direction D1 has a certain separation effect, thereby improving the thermal runaway management performance of the battery pack.

[0063] Furthermore, the detonation pressure of the second explosion-proof valve 132 is not greater than the detonation pressure of the first explosion-proof valve 101, so that the high-temperature airflow in the second chamber 122 can be effectively discharged when the single first explosion-proof valve 101 is exhausted, preventing the high-temperature airflow from gathering and heating up in the battery pack, thereby improving safety.

[0064] Specifically, regarding the connection between the single cell 100 and the side seal guide frame 120, the connection structures such as the pole and terminal of the single cell 100 are arranged in the first chamber 121, and can be sealed in the first chamber 121 with structural adhesive, thereby facilitating the insulation and heat insulation of the single cell 100. The design of the first chamber 121 and the second chamber 122 in the side seal guide frame 120 can not only reasonably arrange the connection structure of the single cell 100, but also effectively discharge the high-temperature gas generated by the single cell 100, and the structure is compact.

[0065] Optionally, in a battery pack, the sum of the volumes of the plurality of single cells 100 is at least half of the volume of the battery pack, thereby ensuring that the battery pack has a higher energy density.

[0066] Alternatively, if Figure 5 In another embodiment of the battery pack shown, multiple single cells 100 are arranged along the first horizontal direction D2 and the second horizontal direction D3, so that the single cells 100 are divided into multiple columns at the same height, which is beneficial to improving the space utilization of the battery pack. In addition, the division into three columns, four columns, etc. along the first horizontal direction D2 or the second horizontal direction D3 is within the protection scope of the present utility model.

[0067] like Figure 1 and Figure 5 As shown, the battery pack according to the present application also includes a control system 140, which is used for voltage / current performance monitoring, charge / discharge mode switching, overcurrent blocking, etc. In addition, the control system 140 may also include a control system for controlling cooling battery modules, fire extinguishing devices, etc.

[0068] The utility model also provides an energy storage system, comprising the battery pack and a box according to the above, wherein the battery pack is located in the box. The energy storage system according to the utility model has good cooling effect, compact structure, high energy density, and can be installed in a modular manner.

[0069] Optionally, the volume of the battery pack is at least 54% of the volume of the box, thereby ensuring that the energy storage system has a higher capacity and energy density.

[0070] Optionally, the sum of the areas of all single cells 100 on the horizontal plane projected onto the support plate 110 along the height direction D1 is 52% to 88% of the bottom area of ​​the box body, which compresses the space occupied by the connection structure between the battery packs in the energy storage system and also enables the energy storage system to have higher capacity and energy density.

[0071] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "setting" appearing in this article may indicate that one component is directly attached to another component, or that one component is attached to another component through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0072] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of the protection claimed by the utility model.

Claims

1. A battery support plate, characterized in that: The support plate is used to be arranged between the largest surfaces of adjacent single cells. The support plate is provided with a groove on the surface close to the single cell. The groove is used to define a channel for air circulation with the largest surface of the single cell. A coolant flow channel is provided inside the support plate.

2. The battery support plate according to claim 1, characterized in that: The groove extends along the second horizontal direction, the support plate is provided with a plurality of the grooves, and the plurality of the grooves are arranged along the first horizontal direction.

3. The battery support plate according to claim 1, characterized in that: The cooling liquid flow channel extends along the second horizontal direction, the support plate is provided with a plurality of the cooling liquid flow channels, and the plurality of the cooling liquid flow channels are arranged along the first horizontal direction.

4. The battery support plate according to claim 1, characterized in that: Along the first horizontal direction, the grooves and the coolant channels are arranged alternately.

5. The battery support plate according to claim 1, characterized in that: The groove and / or the coolant flow channel extend in an S shape.

6. A battery pack, characterized in that: The battery pack comprises: A plurality of single cells, each of which has a maximum surface, and the plurality of single cells are arranged at intervals along a height direction, wherein the height direction is perpendicular to the maximum surface; and According to any one of claims 1 to 5, the support plate is perpendicular to the height direction and is arranged between adjacent single cells, the support plate is provided with a groove on the surface close to the single cell, the groove and the single cell define a channel for air circulation, and a coolant flow channel is provided inside the support plate.

7. The battery pack according to claim 6, characterized in that: The battery pack further includes a side sealing guide frame, which is disposed between the support plates along the height direction, and the side sealing guide frame and the support plates define a containing space for containing the single battery.

8. The battery pack according to claim 7, characterized in that: The side sealing guide frame includes a first chamber and a second chamber, wherein the first chamber is used to accommodate and connect the single battery; the side sealing guide frame also includes an exhaust hole, and the exhaust hole is arranged between the first chamber and the second chamber.

9. The battery pack according to claim 8, characterized in that: The single battery is provided with a first explosion-proof valve, and the first explosion-proof valve is aligned with the exhaust hole.

10. The battery pack according to claim 9, characterized in that: The battery pack also includes a side frame bar, which is arranged at the end of the side seal guide frame. A partition groove is arranged inside the side frame bar. The second chamber of the side seal guide frame is connected to the partition groove, and a second explosion-proof valve is arranged in the partition groove.

11. The battery pack according to claim 10, characterized in that: The partition groove is connected to the second chamber of at least one of the side seal guide frames; and / or The detonation pressure of the second explosion-proof valve is not greater than the detonation pressure of the first explosion-proof valve.

12. The battery pack according to claim 7, characterized in that: The side sealing guide frame is provided with a heat insulating and fireproof coating.

13. The battery pack according to claim 7, characterized in that: The battery pack further includes a structural adhesive, and the structural adhesive is arranged between the side seal guide frame and the support plate.

14. The battery pack according to claim 6, characterized in that: The sum of the volumes of the plurality of single cells is at least half of the volume of the battery pack.

15. The battery pack according to claim 6, characterized in that: The plurality of single cells are arranged along a first horizontal direction parallel to the largest surface.

16. An energy storage system, characterized in that: It comprises a battery pack and a case according to any one of claims 6 to 15, wherein the battery pack is located in the case.

17. The energy storage system according to claim 16, characterized in that: The volume of the battery pack is at least 54% of the volume of the box.

18. The energy storage system according to claim 16, characterized in that: The sum of the areas of all the single cells on the horizontal plane projected onto the support plate along the height direction is 52% to 88% of the bottom area of ​​the box body.

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