Stackable battery pack structure

Abstract

The utility model discloses a stackable battery pack structure which comprises a plurality of single battery packs stacked up and down, each single battery pack consists of a battery pack ring frame and a liquid cooling plate mounted at the bottom of the battery pack ring frame, and a battery core group is placed in a frame cavity of the battery pack ring frame. A frame upper edge ring is arranged on the top ring edge of the outer side of the battery pack ring frame, a frame lower edge ring is arranged on the bottom ring edge of the outer side of the battery pack ring frame, every two adjacent single battery packs are fixedly installed together through the frame upper edge ring and the frame lower edge ring, a liquid cooling cavity is formed in the liquid cooling plate, and the liquid cooling cavity is communicated with the liquid cooling cavity. A liquid inlet and outlet cavity hole is formed in the cavity wall of the liquid cooling cavity, and a liquid inlet and outlet pipe is installed on the outer side of the liquid inlet and outlet cavity hole. The battery pack has the beneficial effects that the space utilization rate is high, the thermal stability is strong, the structure is simplified, the integrated design of the battery pack is facilitated, the production cost is reduced, and the safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a stackable battery pack structure. Background Technology

[0002] In the field of new energy storage applications, the performance of battery packs is crucial. With the rapid development of related industries, higher requirements have been placed on the energy density, stability and space utilization of battery packs.

[0003] Currently, traditional energy storage battery packs have many problems. In terms of space utilization, many battery packs adopt an independent assembly structure with an unreasonable spatial layout, resulting in a large amount of redundant space inside the energy storage container. This prevents the full utilization of the limited space and limits the improvement of the overall energy density of the battery pack. In terms of heat dissipation, most battery packs rely on only one side or simple heat dissipation methods, resulting in uneven heat dissipation of the cells. Moreover, the heat generated by the cells cannot be dissipated in a timely and effective manner. When the battery pack is under high load, the cell temperature rises sharply, which not only reduces the charging and discharging efficiency of the battery but also accelerates the aging of the cells, seriously affecting the battery's service life and safety. Utility Model Content

[0004] The purpose of this invention is to provide a stackable battery pack structure to solve the problems of low space utilization, poor heat dissipation performance, and complex structure that is not conducive to integration in existing energy storage container battery packs.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A stackable battery pack structure includes several stacked individual battery packs. Each individual battery pack consists of a battery pack ring frame and a liquid cooling plate installed at the bottom of the battery pack ring frame. Battery cells are placed inside the frame cavity of the battery pack ring frame. An upper frame ring is provided on the top outer edge of the battery pack ring frame, and a lower frame ring is provided on the bottom outer edge of the battery pack ring frame. Two adjacent individual battery packs are fixedly installed together through the upper and lower frame rings. A liquid cooling cavity is provided inside the liquid cooling plate, and inlet and outlet liquid chamber holes are provided on the cavity wall of the liquid cooling cavity. Inlet and outlet liquid pipes are installed on the outside of the inlet and outlet liquid chamber holes.

[0007] Furthermore, a unit panel mounting hole is provided on one side of the ring wall of the battery pack ring frame, and a cell unit panel is installed in the unit panel mounting hole.

[0008] Furthermore, a sealing ring gasket is provided between the upper edge ring and the lower edge ring of the frame of two adjacent individual battery packs.

[0009] Furthermore, a cell cover is installed on the topmost individual battery pack.

[0010] Furthermore, the liquid cooling cavity is equipped with several alternating front and rear baffles.

[0011] Furthermore, the inlet and outlet liquid pipes are L-shaped liquid pipes, and the lower edge ring of the frame is provided with liquid pipe through slots that match the inlet and outlet liquid pipes.

[0012] Furthermore, a heat dissipation coating is applied to the surface of the liquid cooling plate that contacts the battery cell assembly.

[0013] The beneficial effects of this utility model are: high space utilization, the battery pack ring frame and the liquid cooling plate are directly stacked, eliminating unnecessary connection structures and redundant space, so that the internal space of the battery pack is fully utilized and the energy density of the battery pack is effectively improved.

[0014] With strong thermal stability, the top and bottom sides of the cell are in contact with the liquid cooling plate, which greatly increases the heat dissipation area and significantly improves the heat dissipation efficiency, effectively maintaining the thermal stability of the cell and ensuring that the battery can work stably and efficiently under various operating conditions.

[0015] The simplified structure reduces the complex heat dissipation components and connection structures in traditional battery packs, lowers the number of parts and weight, and also facilitates the integrated design of battery packs, reducing production costs.

[0016] Enhanced safety and improved heat dissipation effectively reduce the safety risks caused by overheating of the battery cells, ensuring the safety of the battery pack during use. Attached Figure Description

[0017] Figure 1 This is a structural diagram of a stackable battery pack structure according to the present invention;

[0018] Figure 2 This utility model describes a stackable battery pack structure for a single battery pack. Figure 1 ;

[0019] Figure 3 This utility model describes a stackable battery pack structure for a single battery pack. Figure 2 ;

[0020] Figure 4 This is a schematic diagram of the internal structure of the liquid cooling plate of the stackable battery pack structure described in this utility model.

[0021] The annotations in the attached figures are explained as follows:

[0022] 1. Single battery pack; 2. Battery pack ring frame; 3. Liquid cooling plate; 4. Battery cell assembly; 5. Cell unit panel; 6. Upper ring of the frame; 7. Lower ring of the frame; 8. Inlet and outlet liquid pipes; 9. Unit panel mounting holes; 10. Cell cover plate; 11. Liquid cooling cavity; 12. Front partition; 13. Rear partition. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings:

[0024] like Figures 1-4 As shown, a stackable battery pack structure includes several individual battery packs 1 stacked one on top of the other. This compact stacking method reduces the additional connecting parts and gap space in the traditional structure, greatly improving the space utilization rate.

[0025] The single battery pack 1 consists of a battery pack ring frame 2 and a liquid cooling plate 3 installed at the bottom of the battery pack ring frame 2. The battery pack ring frame 2 is made of high-strength and lightweight material, which not only provides mechanical support for the entire single battery pack 1, but also serves as the mounting carrier for the liquid cooling plate 3 and the battery cell assembly 4. The battery cell assembly 4 is placed inside the frame cavity of the battery pack ring frame 2. Except for the battery cell assembly 4 in the topmost single battery pack 1, the other battery cell assemblies 4 are rapidly cooled on both the top and bottom sides through the liquid cooling plate 3.

[0026] The battery pack ring frame 2 has an upper frame ring 6 on the top outer edge and a lower frame ring 7 on the bottom outer edge. Two adjacent individual battery packs 1 are fixedly installed together by the upper frame ring 6 and the lower frame ring 7.

[0027] The liquid cooling plate 3 is provided with a liquid cooling cavity 11. The cavity wall of the liquid cooling cavity 11 is provided with liquid inlet and outlet holes. Inlet and outlet liquid pipes 8 are installed on the outside of the liquid inlet and outlet holes. Each single battery pack 1 is provided with two sets of inlet and outlet liquid pipes 8, which are used for liquid inlet and liquid outlet respectively.

[0028] like Figures 1-4 As shown, this utility model also discloses the following more optimized specific structures:

[0029] A unit panel mounting hole 9 is provided on one side of the ring wall of the battery pack ring frame 2. A cell unit panel 5 is installed in the unit panel mounting hole 9. The cell unit panel 5 is connected to the battery cell group 4 and is a relatively common cell accessory.

[0030] A sealing ring gasket (not shown) is provided between the upper edge ring 6 and the lower edge ring 7 of the frame of two adjacent single battery packs 1 to ensure the airtightness requirements of the battery pack.

[0031] The topmost individual battery pack 1 is fitted with a cell cover plate 10 to prevent the top battery cell group 4 from being exposed.

[0032] The liquid cooling cavity 11 is equipped with several alternating front baffles 12 and rear baffles 13, which facilitates the division of the liquid cooling cavity 11 into several flow channels, realizes the flow of coolant, and makes its heat dissipation more uniform.

[0033] The inlet and outlet liquid pipes 8 are L-shaped liquid pipes. The lower edge ring 7 of the frame is provided with a liquid pipe through hole that matches the inlet and outlet liquid pipes 8, so that the L-shaped liquid pipe can extend to the top of the lower edge ring 7 of the frame through the liquid pipe through hole, which facilitates the connection of external hoses.

[0034] A heat dissipation coating is applied to the surface of the liquid cooling plate 3 that contacts the battery cell assembly 4 to increase heat conduction and quickly remove heat.

[0035] Bolt holes are provided on the upper edge ring 6 and the lower edge ring 7 of the frame for easy fixing with bolts.

[0036] like Figures 1-4 The stackable battery pack structure shown is composed of multiple identical individual battery packs 1 stacked together. In each individual battery pack 1 (except for the top layer), the upper and lower sides of the battery cell 4 are in close contact with the liquid cooling plate 3, so that the heat generated by the battery cell can be quickly conducted to the liquid cooling plate 3. The heat is carried away by the circulation of the coolant. The coolant flows into the internal flow channel of the liquid cooling plate 3 through the pipe, flows evenly in the liquid cooling plate 3, absorbs the heat from the battery cell 4, and then flows out through the connecting pipe into the external cooling circulation system for heat dissipation and cooling, and then flows back into the battery pack for circulation.

[0037] The above structure has the following advantages:

[0038] With high space utilization, the battery pack ring frame and liquid cooling plate are directly stacked, eliminating unnecessary connection structures and redundant space, making full use of the internal space of the battery pack and effectively improving the energy density of the battery pack.

[0039] With strong thermal stability, the top and bottom sides of the cell are in contact with the liquid cooling plate, which greatly increases the heat dissipation area and significantly improves the heat dissipation efficiency, effectively maintaining the thermal stability of the cell and ensuring that the battery can work stably and efficiently under various operating conditions.

[0040] The simplified structure reduces the complex heat dissipation components and connection structures in traditional battery packs, lowers the number of parts and weight, and also facilitates the integrated design of battery packs, reducing production costs.

[0041] Enhanced safety and improved heat dissipation effectively reduce the safety risks caused by overheating of the battery cells, ensuring the safety of the battery pack during use.

[0042] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A stackable battery pack structure, characterized in that: The device includes several stacked battery packs, each consisting of a battery pack ring frame and a liquid cooling plate installed at the bottom of the battery pack ring frame. Battery cells are placed within the frame cavity of the battery pack ring frame. An upper ring is located on the top outer edge of the battery pack ring frame, and a lower ring is located on the bottom outer edge of the battery pack ring frame. Adjacent battery packs are fixedly mounted together via the upper and lower rings. The liquid cooling plate contains a liquid cooling cavity, and the cavity wall of the liquid cooling cavity has inlet and outlet liquid chamber holes. Inlet and outlet liquid pipes are installed on the outer side of the inlet and outlet liquid chamber holes.

2. The stackable battery pack structure according to claim 1, characterized in that: A unit panel mounting hole is provided on one side of the ring wall of the battery pack ring frame, and a cell unit panel is installed in the unit panel mounting hole.

3. The stackable battery pack structure according to claim 1, characterized in that: A sealing ring gasket is provided between the upper edge ring and the lower edge ring of the frame of two adjacent individual battery packs.

4. The stackable battery pack structure according to claim 1, characterized in that: The topmost individual battery pack has a cell cover installed on it.

5. The stackable battery pack structure according to claim 1, characterized in that: The liquid cooling cavity is equipped with several alternating front and rear baffles.

6. The stackable battery pack structure according to claim 1, characterized in that: The inlet and outlet liquid pipes are L-shaped liquid pipes, and the lower edge ring of the frame is provided with liquid pipe through slots that match the inlet and outlet liquid pipes.

7. The stackable battery pack structure according to claim 1, characterized in that: A heat dissipation coating is applied to the surface of the liquid cooling plate that contacts the battery cell assembly.

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