Battery cell module and battery pack

Abstract

The utility model discloses a kind of electric core module and battery pack, it is related to energy storage electric core technical field.The electric core module includes first module and second module, first module includes tray frame and first electric core stack, first electric core stack is stacked by multiple first electric core, tray frame is used to support first electric core stack, second module includes liquid cooling plate and second electric core stack, second electric core stack is stacked by multiple second electric core, second electric core stack is fixed on the upper surface of liquid cooling plate, so that liquid cooling plate can be heat exchanged with second electric core stack, first electric core stack is fixed on the lower surface of liquid cooling plate, so that liquid cooling plate can be heat exchanged with first electric core stack.Due to second electric core stack fixed on the upper surface of liquid cooling plate, compared with prior art, the tray frame for fixing second electric core stack is saved, so that the structure of the electric core module is simpler, and the manufacturing cost of the electric core module is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of energy storage cell technology, and particularly relates to a cell module and battery pack. Background Technology

[0002] Lithium-ion batteries are characterized by high energy density and long cycle life, and are widely used in energy storage, electric vehicles, and backup power. During charging and discharging, lithium-ion battery cells generate a significant amount of heat. Overheating accelerates side reactions within the cells, reducing their performance and lifespan.

[0003] Therefore, in the existing technology, a liquid cooling plate is usually set in the cell module to cool the cell. The cell module includes an upper module, a lower module and a liquid cooling plate. The liquid cooling plate is fixed between the upper module and the lower module. The existing cell module structure is relatively complex. Therefore, it is necessary to design a cell module with a simpler structure. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a battery cell module and battery pack, addressing the issue of the complex structure of existing battery cell modules.

[0005] To address the aforementioned problems, this utility model provides a battery cell module, comprising a first module and a second module. The first module includes a tray frame and a first battery cell stack, the first battery cell stack comprising a plurality of stacked first battery cells, the tray frame supporting the first battery cell stack. The second module includes a liquid cooling plate and a second battery cell stack, the second battery cell stack comprising a plurality of stacked second battery cells. The second battery cell stack is fixed to the upper surface of the liquid cooling plate to allow the liquid cooling plate to exchange heat with the second battery cell stack, and the first battery cell stack is fixed to the lower surface of the liquid cooling plate to allow the liquid cooling plate to exchange heat with the first battery cell stack.

[0006] As a further improvement to the above technical solution:

[0007] Optionally, the first cell is a square cell or a blade cell, and a plurality of the first cells are stacked along the thickness direction of the first cell; and / or, the second cell is a square cell or a blade cell, and a plurality of the second cells are stacked along the thickness direction of the second cell.

[0008] Optionally, the pallet frame includes a pallet base plate and two pallet baffles, the two pallet baffles being spaced apart on the upper surface of the pallet base plate along a first direction, and the first cell stack being located between the two pallet baffles.

[0009] Optionally, an insulating medium is provided between the first cell stack and the tray baffle, and between the first cell stack and the tray bottom plate.

[0010] Optionally, an elastic medium is provided between two adjacent first cells and between two adjacent second cells.

[0011] Optionally, thermally conductive structural adhesive is provided between the first battery cell stack and the liquid cooling plate, and between the second battery cell stack and the liquid cooling plate.

[0012] Optionally, the second module further includes two limiting baffles, which are installed at intervals along a first direction on the upper surface of the liquid cooling plate, and the second battery cell stack is located between the two limiting baffles.

[0013] Optionally, an insulating medium is provided between the second cell stack and the limiting baffle, as well as on the upper surface of the second cell stack.

[0014] On the other hand, this utility model embodiment provides a battery pack, including the cell module as described above.

[0015] As a further improvement to the above technical solution:

[0016] Optionally, the battery cell module may have multiple cells.

[0017] All of the battery cell modules are arranged side by side along the first direction;

[0018] or,

[0019] All the aforementioned battery cell modules are arranged side by side along the second direction; wherein the first direction, the second direction, and the vertical direction are perpendicular to each other.

[0020] or,

[0021] All of the aforementioned battery cell modules are stacked vertically.

[0022] Optionally, the plurality of battery cell modules are arranged in multiple layers along the vertical direction, and the battery cell modules in each layer are arranged side by side along the first direction;

[0023] or,

[0024] Multiple battery cell modules are arranged in multiple layers along the vertical direction, and the battery cell modules in each layer are arranged side by side along the second direction;

[0025] or,

[0026] The multiple battery cell modules are arranged in multiple layers along the vertical direction, and the battery cell modules in each layer are arranged in multiple layers along the first direction and multiple layers along the second direction.

[0027] The battery cell module and battery pack provided in this embodiment of the present invention have at least the following advantages compared with the prior art: Since the second battery cell stack is fixed to the upper surface of the liquid cooling plate, the tray frame for fixing the second battery cell stack is eliminated compared with the existing technical solutions, making the structure of the battery cell module simpler and reducing the manufacturing cost of the battery cell module. Furthermore, the first battery cell stack is fixed to the lower surface of the liquid cooling plate, allowing the liquid cooling plate to exchange heat with both the first and second battery cell stacks respectively. The liquid cooling system has a simple structure, is easy to install, and has a low overall cost. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of a battery cell module provided in one embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the structure of the first module of the battery cell module provided in one embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of the second module of the battery cell module provided in one embodiment of the present invention.

[0032] The reference numerals in the accompanying drawings are as follows:

[0033] 100. Battery cell module; 110. First module; 111. Pallet frame; 112. First battery cell stack; 113. First battery cell; 114. Pallet base plate; 115. Pallet baffle; 120. Second module; 121. Liquid cooling plate; 122. Second battery cell stack; 123. Second battery cell; 124. Limit baffle. Detailed Implementation

[0034] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0035] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] like Figures 1 to 3 As shown, an embodiment of the present invention provides a battery cell module 100, which includes a first module 110 and a second module 120. The first module 110 includes a tray frame 111 and a first battery cell stack 112. The first battery cell stack 112 includes a plurality of first battery cells 113 stacked together. The tray frame 111 is used to support the first battery cell stack 112. The second module 120 includes a liquid cooling plate 121 and a second battery cell stack 123. The second battery cell stack 123 includes a plurality of second battery cells 123 stacked together. The second battery cell stack 123 is fixed to the upper surface of the liquid cooling plate 121 so that the liquid cooling plate 121 can exchange heat with the second battery cell stack 123. The first battery cell stack 112 is fixed to the lower surface of the liquid cooling plate 121 so that the liquid cooling plate 121 can exchange heat with the first battery cell stack 112.

[0038] Since the second battery cell stack 123 is fixed to the upper surface of the liquid cooling plate 121, compared with the existing technical solution, the tray frame 111 for fixing the second battery cell stack 123 is eliminated, making the structure of the battery cell module 100 provided in this embodiment of the utility model simpler and reducing the manufacturing cost of the battery cell module 100. Furthermore, the first battery cell stack 112 is fixed to the lower surface of the liquid cooling plate 121, so that the liquid cooling plate 121 can exchange heat with the first battery cell stack 112 and the second battery cell stack 123 respectively. The liquid cooling system has a simple structure, is easy to install, and has a low overall cost.

[0039] One embodiment of this utility model provides a battery cell module 100, such as... Figures 1 to 3As shown, the first cell 113 is a square cell or a blade-type cell, and multiple first cells 113 are stacked along the thickness direction of the first cell 113; and / or, the second cell 123 is a square cell or a blade-type cell, and multiple second cells 123 are stacked along the thickness direction of the second cell 123.

[0040] In this embodiment, the thickness direction of the first battery cell 113 is consistent with the length direction of the liquid cooling plate 121. One side of each of the first battery cells 113 along the thickness direction can exchange heat with the lower surface of the liquid cooling plate 121. Similarly, the thickness direction of the second battery cell 123 is consistent with the length direction of the liquid cooling plate 121. One side of each of the second battery cells 123 along the thickness direction can exchange heat with the upper surface of the liquid cooling plate 121, thereby improving the temperature uniformity of each first battery cell 113 and each second battery cell 123 and avoiding excessively high temperatures in some battery cells.

[0041] Please refer to the following for details regarding the battery cell module 100 provided in one embodiment of this utility model. Figure 2 The pallet frame 111 includes a pallet base plate 114 and two pallet baffles 115. The two pallet baffles 115 are installed at intervals along a first direction on the upper surface of the pallet base plate 114, and the first cell stack 112 is confined between the two pallet baffles 115. The two pallet baffles 115 limit the first cell stack 112, so that the first cells 113 of the first cell stack 112 are in contact with each other.

[0042] In this embodiment, two tray baffles 115 are spaced apart along the length of the tray bottom plate 114, and each first cell 113 of the first cell stack 112 is stacked along the length of the tray bottom plate 114. The two tray baffles 115 can prevent the first cells 113 of the first cell stack 112 from moving away from each other, so that the first cells 113 of the first cell stack 112 are close to each other.

[0043] In one specific embodiment, an insulating medium is provided between the first cell stack 112 and the tray baffle 115, and between the first cell stack 112 and the tray bottom plate 114. The insulating medium prevents electrical conduction between the first cell stack 112 and the tray baffle 115, and between the first cell stack 112 and the tray bottom plate 114, thereby improving the safety of the cell module 100. In this embodiment, the insulating medium is selected from materials such as polyethylene, polyvinyl chloride, and polystyrene, which have good insulation properties, mechanical properties, and corrosion resistance.

[0044] In one specific embodiment, an elastic medium is provided between two adjacent first cells 113 and between two adjacent second cells 123. The elastic medium can buffer the collisions between two adjacent first cells 113 and between two adjacent second cells 123, and can prevent the cells from being deformed due to compression between two adjacent first cells 113 and between two adjacent second cells 123, thereby affecting the performance of the cells.

[0045] In one embodiment of this utility model, a battery cell module 100 is provided, wherein thermally conductive structural adhesive is provided between the first battery cell stack 112 and the liquid cooling plate 121, and between the second battery cell stack 123 and the liquid cooling plate 121. The thermally conductive structural adhesive can further fix the first battery cell stack 112 and the second battery cell stack 123, so that the first battery cell stack 112 is fixed to the lower surface of the liquid cooling plate 121, and the second battery cell stack 123 is fixed to the upper surface of the liquid cooling plate 121. Furthermore, the thermally conductive structural adhesive can conduct heat between the first battery cell stack 112 and the liquid cooling plate 121, and between the second battery cell stack 123 and the liquid cooling plate 121, thereby improving the heat transfer efficiency.

[0046] Please refer to the following for details regarding the battery cell module 100 provided in one embodiment of this utility model. Figure 3 The second module 120 also includes two limiting baffles 124, which are installed at intervals along a first direction on the upper surface of the liquid cooling plate 121, and the second battery cells 123 are stacked between the two limiting baffles 124. The two limiting baffles 124 limit the stack of second battery cells 123, so that the individual second battery cells 123 in the stack of second battery cells 123 are in close contact with each other.

[0047] In this embodiment, two limiting baffles 124 are spaced apart along the length of the liquid cooling plate 121, and the second cells 123 of the second cell stack are stacked along the length of the liquid cooling plate 121. The two limiting baffles 124 can prevent the second cells 123 of the second cell stack from moving away from each other, so that the second cells 123 of the second cell stack are in close contact with each other.

[0048] In one specific embodiment, an insulating medium is provided between the second battery cell stack 123 and the limiting baffle 124, as well as on the upper surface of the second battery cell stack 123. The insulating medium prevents electrical conduction between the second battery cell stack 123 and the limiting baffle 124, and between the second battery cell stack 123 and the tray base plate 114 (when the battery cell modules 100 are stacked), thereby improving the safety of the battery cell module 100. In this embodiment, the insulating medium is selected from polyethylene, polyvinyl chloride, polystyrene, etc., which have good insulation properties, mechanical properties, and corrosion resistance.

[0049] In addition, another embodiment of this utility model provides a battery pack, which includes a cell module 100 as provided in any of the above embodiments. The specific structure of the cell module 100 is the same as described in the above embodiments. Since this battery pack adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0050] In one specific embodiment, multiple battery cell modules 100 are provided. All battery cell modules 100 are arranged side-by-side along a first direction; or, all battery cell modules 100 are arranged side-by-side along a second direction; wherein the first direction, the second direction, and the vertical direction are mutually perpendicular; or, all battery cell modules 100 are stacked in a vertical direction. Both the first and second directions are horizontal, and the first and second directions are perpendicular to each other.

[0051] In this embodiment, multiple battery cell modules 100 are arranged in multiple layers along the vertical direction, with each layer of battery cell modules 100 arranged side-by-side along a first direction. In another embodiment, multiple battery cell modules 100 are arranged in multiple layers along the vertical direction, with each layer of battery cell modules 100 arranged side-by-side along a second direction. In yet another embodiment, multiple battery cell modules 100 are arranged in multiple layers along the vertical direction, with multiple battery cell modules 100 arranged along both the first and second directions in each layer. The appropriate number of battery cell modules 100 is selected according to actual needs, and the battery cell modules 100 are arranged according to the spatial structure of the cabinet.

[0052] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. An electric cell module, characterized by comprising: The first module comprises a tray frame and a first cell stack, the first cell stack comprises a plurality of first cells stacked together, and the tray frame is used to support the first cell stack; and the second module comprises a liquid cooling plate and a second cell stack, the second cell stack comprises a plurality of second cells stacked together, and the second cell stack is fixed to the upper surface of the liquid cooling plate so that the liquid cooling plate can exchange heat with the second cell stack, and the first cell stack is fixed to the lower surface of the liquid cooling plate so that the liquid cooling plate can exchange heat with the first cell stack.

2. The battery cell module of claim 1, wherein, The first cell is a square cell or a blade cell, and a plurality of the first cells are stacked along the thickness direction of the first cell; and / or the second cell is a square cell or a blade cell, and a plurality of the second cells are stacked along the thickness direction of the second cell.

3. The battery cell module of claim 1, wherein, The tray frame comprises a tray bottom plate and two tray baffles, and the two tray baffles are installed on the upper surface of the tray bottom plate in a spaced manner along a first direction, and the first cell stack is limited between the two tray baffles.

4. The battery cell module of claim 3, wherein, Insulating medium is arranged between the first cell stack and the tray baffles and between the first cell stack and the tray bottom plate.

5. The battery cell module of claim 1, wherein, Elastic medium is arranged between adjacent two first cells and between adjacent two second cells.

6. The battery cell module of claim 1, wherein, Thermally conductive structural adhesive is arranged between the first cell stack and the liquid cooling plate and between the second cell stack and the liquid cooling plate.

7. The battery cell module of claim 1, wherein, The second module further comprises two limiting baffles, and the two limiting baffles are installed on the upper surface of the liquid cooling plate in a spaced manner along a first direction, and the second cell stack is limited between the two limiting baffles.

8. The battery cell module of claim 7, wherein, Insulating medium is arranged between the second cell stack and the limiting baffles and on the upper surface of the second cell stack.

9. A battery pack, characterized by, The cell module comprises the cell module as claimed in any one of claims 1 to 8.

10. The battery pack of claim 9, wherein, The cell module is provided in a plurality.

11. The battery pack of claim 10, wherein, All the cell modules are arranged side by side along a first direction; or, All the cell modules are arranged side by side along a second direction; wherein the first direction, the second direction and a vertical direction are perpendicular to each other; or, All the cell modules are arranged in layers along a vertical direction.

12. The battery pack of claim 10, wherein, A plurality of the cell modules are arranged in a plurality of layers along the vertical direction, and the cell modules in each layer are arranged side by side along a first direction; or, A plurality of the cell modules are arranged in a plurality of layers along the vertical direction, and the cell modules in each layer are arranged side by side along a second direction; or, A plurality of the cell modules are arranged in a plurality of layers along the vertical direction, and the cell modules in each layer are arranged in a plurality along a first direction and in a plurality along a second direction.

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