Cold plate structure of energy storage battery pack and energy storage battery pack

Abstract

The utility model provides a cold plate structure of an energy storage battery pack and the energy storage battery pack, and relates to the technical field of battery packs. The cold plate structure of the energy storage battery pack comprises a water cooling plate, the water cooling plate comprises a plurality of parallel plate bodies, and every two adjacent plate bodies are attached to two large faces of one battery in the battery pack respectively. Every two adjacent plate bodies are attached to the two large faces of one battery in the battery pack, the multiple parallel plate bodies achieve heat exchange and cooling of the batteries in the same row, and the plate bodies and the batteries are alternately distributed in the battery arrangement direction. Therefore, the two large surfaces of the two adjacent batteries share the same plate body, so that the contact area between the batteries and the plate body can be obviously increased, and the heat dissipation efficiency of the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to a cold plate structure of an energy storage battery pack and an energy storage battery pack. Background Art

[0002] A battery pack is a device that contains batteries, usually composed of multiple single cells. It is widely used in various occasions that require large amounts of storage and release of electrical energy, such as electric vehicles, solar power stations, UPS and other power systems. Since the heat generated by the battery pack during use affects the service life of the battery pack, it is necessary to dissipate the heat of the battery pack.

[0003] At present, a cold plate is installed at the bottom of the battery pack, and the battery pack is cooled by heat exchange of the cold plate. However, since the existing cold plate is installed at the bottom of the battery pack, the battery pack can only exchange heat with the cold plate through the bottom, which affects the internal temperature difference between the upper and lower parts of the energy storage battery pack, and the heat dissipation effect is poor, which in turn affects the life of the battery pack. Utility Model Content

[0004] The problem solved by the utility model is: how to improve the heat dissipation effect of the battery pack.

[0005] To solve the above problems, on the one hand, the utility model provides a cold plate structure of an energy storage battery pack, including a water-cooled plate, wherein the water-cooled plate includes a plurality of plate bodies parallel to each other, and each two adjacent plate bodies are respectively used to fit with two large surfaces of a battery in the battery pack.

[0006] Optionally, the water-cooling plate further includes a connecting plate, and two adjacent plate bodies are connected via the connecting plate, and the plate bodies and the connecting plate are sequentially connected end to end so that the water-cooling plate extends in an S shape.

[0007] Optionally, the connecting plate is arc-shaped to surround the side surfaces of the battery.

[0008] Optionally, the connecting plate and the plate body are integrally formed.

[0009] Optionally, a plurality of water cooling channels arranged in parallel are arranged inside the water cooling plate, and the water cooling channels are used to extend along the extension direction of the water cooling plate.

[0010] Optionally, a water inlet manifold for receiving coolant is provided at an end portion of the water cooling plate in the extension direction, and the water inlet manifold is respectively connected to the plurality of water cooling channels.

[0011] Optionally, a water outlet manifold for discharging coolant is provided at an end portion of the water cooling plate in the extension direction, and the water outlet manifold is respectively connected to the plurality of water cooling channels.

[0012] Optionally, a water inlet sealing structure is provided at the connection between the water inlet manifold and the plurality of water cooling channels.

[0013] Optionally, a water outlet sealing structure is provided at the connection between the water outlet manifold and the plurality of water cooling channels.

[0014] Compared with the prior art, the cold plate structure of the energy storage battery pack of the utility model can realize heat exchange cooling of the same row of batteries by having each two adjacent plate bodies respectively fit the two large surfaces of a battery in the battery pack. Multiple parallel plate bodies can realize heat exchange cooling of the batteries in the same row, and realize alternating distribution of the plate bodies and the batteries in the battery arrangement direction, so that the two large surfaces of two adjacent batteries share the same plate body, and the two side surfaces of each plate body are used for heat exchange. In this way, the contact area between the battery and the plate body can be significantly increased, thereby improving the heat dissipation efficiency of the battery pack; in addition, compared with single-sided heat dissipation, condensation on one side can be avoided when the plate body is used for heat exchange on both sides, thereby avoiding battery safety hazards.

[0015] On the other hand, the utility model also provides an energy storage battery pack, comprising the energy storage battery pack cold plate structure as described above.

[0016] The advantages of the energy storage battery pack and the cold plate structure of the energy storage battery pack over the prior art are the same and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A top view of the cold plate structure of the energy storage battery pack in an embodiment of the present utility model;

[0018] Figure 2 It is an axonometric diagram of the cold plate structure of the energy storage battery pack in the embodiment of the utility model;

[0019] Figure 3 It is an assembly diagram of the cold plate structure of the energy storage battery pack in the embodiment of the present utility model.

[0020] Description of reference numerals:

[0021] 1-water cooling plate; 11-plate body; 12-connecting plate; 2-battery pack; 3-water inlet manifold; 4-water outlet manifold. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] In the accompanying drawings, the Z axis represents the vertical direction, that is, the up and down position, and the positive direction of the Z axis (that is, the direction of the arrow of the Z axis) represents the top, and the negative direction of the Z axis (that is, the direction opposite to the positive direction of the Z axis) represents the bottom; the X axis in the accompanying drawings represents the horizontal position, and the positive direction of the X axis (that is, the direction of the arrow of the X axis) represents the right side, and the negative direction of the X axis (that is, the direction opposite to the positive direction of the X axis) represents the left side; the Y axis in the accompanying drawings represents the front and back position, and the positive direction of the Y axis (that is, the direction of the arrow of the Y axis) represents the front side, and the negative direction of the Y axis (that is, the direction opposite to the positive direction of the Y axis) represents the back side. It should also be noted that the aforementioned Z axis, X axis and Y axis are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the utility model.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0025] Combine 1 and Figure 2 As shown, the utility model provides a cold plate structure for an energy storage battery pack, including a water-cooled plate 1, wherein the water-cooled plate 1 includes a plurality of mutually parallel plate bodies 11, and each two adjacent plate bodies 11 are respectively used to fit with two large surfaces of a battery in a battery pack 2.

[0026] Specifically, a plurality of square batteries are arranged along a preset direction (which can be understood as the Y-axis direction) to form a row of batteries, and the battery pack may include one or more rows of batteries. Taking the horizontal placement of the battery pack as an example, in a single square battery, the square battery includes two upper and lower end faces and four side faces, the upper end face of the square battery is the end face where the positive and negative electrodes are located, and the two side faces with larger areas among the four side faces are large faces. In the same row of square batteries, the large faces of any two adjacent batteries are arranged oppositely, and a plurality of plate bodies 11 are arranged in sequence and arranged in parallel along the arrangement direction of the square batteries, and each two adjacent plate bodies 11 are respectively fitted with the two large faces of a battery in the battery pack 2, that is, the plate bodies 11 and the square batteries are alternately arranged in the Y-axis direction, so that the two large faces of any two adjacent batteries can share the same plate body 11.

[0027] Therefore, in this embodiment, by each two adjacent plate bodies 11 being respectively fitted with the two large surfaces of a battery in the battery pack 2, a plurality of mutually parallel plate bodies 11 can realize heat exchange cooling for the same row of batteries, and realize that the plate bodies 11 and the batteries are alternately distributed in the battery arrangement direction, so that the two large surfaces of two adjacent batteries share the same plate body 11, and the two side surfaces of each plate body 11 are used for heat exchange, so that the contact area between the battery and the plate body 11 can be significantly increased, thereby improving the heat dissipation efficiency of the battery pack; in addition, compared with single-sided heat dissipation, condensation on one side can be avoided when the plate body 11 performs heat exchange on both sides, thereby avoiding battery safety hazards.

[0028] Optionally, combined Figure 1 and Figure 2 As shown, the water-cooling plate 1 further includes a connecting plate 12 , and two adjacent plate bodies 11 are connected via the connecting plate 12 , and the plate bodies 11 and the connecting plate 12 are sequentially connected end to end so that the water-cooling plate 1 extends in an S shape.

[0029] Specifically, the water-cooled plate 1 is a plate structure with cooling water flowing inside. The plate body 11 is alternately connected with the connecting plate 12, and the opposite side edges of each plate body 11 are the head end and the tail end, respectively. The head end is used to connect with the previous connecting plate 12, and the tail end is used to connect with the next connecting plate 12. Then, the tail end of the first plate body 11 is connected to the head end of the first connecting plate 12, the tail end of the first connecting plate 12 is connected to the head end of the second plate body 11, and the tail end of the second plate body 11 is connected to the head end of the third connecting plate 12, and so on, so that the alternately connected plate bodies 11 and connecting plates 12 form an S shape. Water cooling channels are provided inside the connecting plates 12 and the plate bodies 11, and the water cooling channels inside the connecting plates 12 and the plate bodies 11 are correspondingly connected.

[0030] In this way, the connecting plate 12 is connected between two adjacent plate bodies 11, and the plate body 11 and the connecting plate 12 are connected end to end in sequence so that the water-cooled plate 1 extends in an S shape. The connecting plate 12 realizes the series connection between multiple plate bodies 11, so that the multiple plate bodies 11 form an integral structure. In this way, the multiple plate bodies 11 share the same water-cooling channel to improve the ease of use of the water-cooled plate 1.

[0031] Optionally, combined Figure 1 and Figure 2 As shown, the connecting plate 12 is curved to surround the side surfaces of the battery.

[0032] Specifically, the side surfaces of the battery refer to two side surfaces whose side surfaces are smaller than the two large side surfaces among the four side surfaces of the battery, and the connecting plate 12 is arc-shaped to surround the side surfaces of the battery.

[0033] In this way, by forming the connecting plate 12 into an arc shape to surround the side surface of the battery, the connecting plate 12 can increase the contact area between the water-cooling plate 1 and the external environment, thereby also improving the heat dissipation efficiency of the plurality of plate bodies 11 .

[0034] Optionally, the connecting plate 12 and the plate body 11 are integrally formed.

[0035] Specifically, the water-cooled plate 1 can be a porous flat plate, and the porous flat plate is subjected to an S-shaped bending process to integrally form the connecting plate 12 and the plate body 11. In this way, the connection structure of the connecting plate 12 and the plate body 11 can be simplified, and the stability of the connection between the connecting plate 12 and the plate body 11 can be improved.

[0036] Optionally, a plurality of water cooling channels arranged in parallel are arranged inside the water cooling plate 1 , and the water cooling channels are used to extend along the extension direction of the water cooling plate 1 .

[0037] Specifically, multiple water cooling channels are distributed in parallel along the vertical direction of the battery pack 2, and the water cooling channels are arranged along the extension direction of the water cooling plate 1. In this way, multiple parallel cooling channels are extended along the extension direction of the water cooling plate 1, so that multiple vertically parallel cooling water channels are formed inside the water cooling plate 1. In this way, according to the temperature gradient in the battery pack 2, the internal channels of the water cooling plate 1 can be diverted to improve the temperature uniformity performance of the internal temperature of the battery pack 2.

[0038] Optionally, combined Figure 1 and Figure 3 As shown, a water inlet manifold 3 for receiving the cooling liquid is provided at the end of the water cooling plate 1 in the extension direction, and the water inlet manifold 3 is communicated with a plurality of water cooling channels respectively.

[0039] Specifically, the water inlet manifold 3 is a manifold, which has one water inlet and multiple water outlets, and the multiple water outlets of the manifold can be respectively connected to the multiple water cooling channels of the water cooling plate 1. After the coolant passes through the single water inlet of the manifold, it can be diverted to the corresponding water cooling channels through the multiple water outlets.

[0040] In this way, a water inlet manifold 3 for connecting the coolant is provided at the water inlet of the water-cooled plate 1, and the water inlet manifold 3 is respectively connected to multiple water-cooling channels. Not only can the structure of connecting multiple water-cooling channels to the coolant be simplified through the water inlet manifold 3, but the coolant can also be diverted through the water inlet manifold 3, thereby improving the convenience of use of the water-cooled plate 1.

[0041] Optionally, combined Figure 1 and Figure 3 As shown, a water outlet manifold 4 for discharging the coolant is provided at the end of the water cooling plate 1 in the extension direction, and the water outlet manifold 4 is respectively connected to a plurality of water cooling channels.

[0042] Specifically, the water outlet manifold 4 and the water inlet manifold 3 have the same principle and are both manifolds.

[0043] In this way, a water outlet manifold 4 for discharging the coolant is provided at the water outlet of the water cooling plate 1, and the water outlet manifold 4 is respectively connected to multiple water cooling channels, so that the coolant in multiple water cooling channels can be discharged centrally through a single water outlet on the manifold 4, thereby facilitating the collection of the coolant.

[0044] Optionally, a water inlet sealing structure is provided at the connection between the water inlet manifold 3 and the plurality of water cooling channels.

[0045] Specifically, the water inlet sealing structure can be a rubber sealing ring or a water sealing tape or other structure for achieving water sealing. Taking the rubber sealing ring as an example, the rubber sealing ring is assembled at the water outlets corresponding to the multiple water cooling channels and the water inlet manifold 3 to prevent leakage of the coolant. In this way, the water inlet sealing structure is arranged at the connection between the water manifold 3 and the multiple water cooling channels to achieve the sealing of the water manifold 3 and the multiple water cooling channels, so as to improve the sealing effect of the water cooling plate 1.

[0046] Optionally, a water outlet sealing structure is provided at the connection between the water outlet manifold 4 and the plurality of water cooling channels.

[0047] Specifically, similar to the principle of the water inlet sealing structure, the water outlet sealing structure is assembled at the water outlets corresponding to the multiple water cooling channels and the water inlet manifold 3 to prevent leakage of the coolant. In this way, the water outlet sealing structure is arranged at the connection between the water outlet manifold 4 and the multiple water cooling channels to achieve the sealing of the water outlet manifold 4 and the multiple water cooling channels, so as to improve the sealing effect of the water cooling plate 1.

[0048] Another embodiment of the present invention further provides an energy storage battery pack, comprising the above energy storage battery pack cold plate structure.

[0049] The advantages of the energy storage battery pack and the cold plate structure of the energy storage battery pack over the prior art are the same and will not be elaborated here.

[0050] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A cold plate structure for an energy storage battery pack, characterized in that: It comprises a water cooling plate (1), wherein the water cooling plate (1) comprises a plurality of mutually parallel plate bodies (11), and each two adjacent plate bodies (11) are respectively used to fit with two large surfaces of a battery in a battery pack (2).

2. The cold plate structure of the energy storage battery pack according to claim 1, characterized in that: The water-cooling plate (1) further comprises a connecting plate (12), two adjacent plate bodies (11) being connected via the connecting plate (12), and the plate bodies (11) and the connecting plate (12) being connected end to end in sequence so that the water-cooling plate (1) extends in an S-shape.

3. The cold plate structure of the energy storage battery pack according to claim 2, characterized in that: The connecting plate (12) is arc-shaped to surround the side surface of the battery.

4. The cold plate structure of the energy storage battery pack according to claim 2, characterized in that: The connecting plate (12) and the plate body (11) are integrally formed.

5. The cold plate structure of the energy storage battery pack according to claim 2, characterized in that: A plurality of water cooling channels arranged in parallel are arranged inside the water cooling plate (1), and the water cooling channels are used to extend along the extension direction of the water cooling plate (1).

6. The cold plate structure of the energy storage battery pack according to claim 5, characterized in that: A water inlet manifold (3) for receiving cooling liquid is provided at the end of the water cooling plate (1) in the extension direction, and the water inlet manifold (3) is respectively connected to the plurality of water cooling channels.

7. The cold plate structure of the energy storage battery pack according to claim 5, characterized in that: A water outlet manifold (4) for discharging cooling liquid is provided at the end of the water cooling plate (1) in the extension direction, and the water outlet manifold (4) is respectively connected to the plurality of water cooling channels.

8. The cold plate structure of the energy storage battery pack according to claim 6, characterized in that: A water inlet sealing structure is provided at the connection between the water inlet manifold (3) and the plurality of water cooling channels.

9. The cold plate structure of the energy storage battery pack according to claim 7, characterized in that: A water outlet sealing structure is provided at the connection between the water outlet manifold (4) and the plurality of water cooling channels.

10. An energy storage battery pack, characterized in that: It comprises a cold plate structure of an energy storage battery pack as claimed in any one of claims 1 to 9.

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