Battery stacking structure

Abstract

The battery stacking structure comprises battery cells, and a plurality of battery cells are arranged and connected to form a battery module; pole columns of the battery cells are arranged upwards, and a buffer layer is filled between the adjacent battery cells. According to the utility model, on one hand, the pole of the battery cell is arranged upwards, so that electrolyte is precipitated to the bottom of the battery cell under the action of gravity, and the cycle life of the battery cell is greatly prolonged; and on the other hand, the battery modules are fixed in the box body and then stacked through the box body, so that the stacking speed is greatly improved, the safety is good, the reliability is high, and centralized management is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of battery stacking, in particular to a battery stacking structure. Background Art

[0002] Energy storage system is a technology used to store electrical energy. The main function of energy storage system is to store excess electrical energy and release it when needed, so as to balance the load of the power grid, improve the predictability of renewable energy, provide backup power, etc. At present, the core component of most energy storage systems is the battery pack, which is a collection of multiple battery cells and is a direct component for storing electrical energy. The energy efficiency, life and reliability of the battery pack are crucial to the performance of the entire energy storage system. Therefore, technicians in this field have been continuously optimizing the design and management of energy storage systems and battery packs.

[0003] There is a common problem with the existing battery stacking structure on the market, that is, the battery cell poles are mostly stacked towards the wall, because this can effectively utilize the vertical space to store more battery cells and facilitate heat dissipation; however, this stacking structure will cause the electrolyte to not sink to the bottom of the battery cell. Under the action of gravity, the electrolyte will settle to the side of the battery cell along the wall direction, which will affect the cycle life of the battery cell after long-term use.

[0004] In addition, the existing battery stacking structure usually directly places the battery module on a fixing frame with a slot, and the battery module can be stacked by inserting the battery module into the slot; or the battery module is directly fixed to the fixing frame by screws, which is equivalent to exposing the battery module to the outside. On the one hand, this stacking structure is easy to make the battery module be affected by the external environment, such as moisture, dust, vibration, etc., which may cause damage to the battery module or performance degradation; it is also easy to cause safety problems such as short circuit and electrical fire, and the reliability is low; on the other hand, the battery modules need to be stacked one by one, and the stacking speed is slow. Utility Model Content

[0005] The utility model aims to overcome the above-mentioned deficiencies of the prior art and to provide a battery stacking structure with fast stacking speed, long battery cell cycle life, good safety and high reliability.

[0006] The technical solution of the utility model is: a battery stacking structure, including a battery cell, and a plurality of battery cells are arranged and connected to form a battery module; it is characterized in that the poles of the battery cell are arranged upward, the battery module is arranged in a box, at least one battery module is accommodated in the box, and a plurality of boxes are stacked up and down to form a stacking structure.

[0007] Furthermore, a buffer layer is filled between adjacent battery cells.

[0008] Furthermore, the battery cells are clamped by pressing plates at both ends of the battery module, and the entire battery module is then bound by steel belts, so that the pressing plates and the battery module are formed into a whole by the steel belts.

[0009] Furthermore, the pressing plate is fixed to the box body by a long screw.

[0010] Alternatively, a plurality of grooves for placing battery cells are die-cast in the box body, and the battery cells are placed in each groove one by one.

[0011] Furthermore, thermally conductive silicone is provided between the battery core and the groove.

[0012] Furthermore, at least one side of the box is fixed to a wall or other platform via an L-shaped connector.

[0013] Furthermore, both sides of the battery module are provided with connection rows for connecting the battery cells inside the battery module to form a series or parallel circuit; both sides of the box body are provided with module integral connection rows for connecting communication and control signals between different battery modules.

[0014] Furthermore, covers are provided on both sides of the box body, and heat dissipation structures are provided on the covers.

[0015] Furthermore, the buffer layer is buffer cotton.

[0016] The beneficial effects of the utility model are as follows: on the one hand, by installing the battery cell with the pole facing upward, the electrolyte is allowed to settle to the bottom of the battery cell under the action of gravity, thereby greatly improving the cycle life of the battery cell; on the other hand, by fixing the battery module in the box and then stacking through the box, the stacking speed is greatly improved, that is, the battery module can be prefabricated in the box in advance according to the utility model, and when stacking on site, the box can be directly stacked. The battery module is protected by the box, has good safety, high reliability, and is convenient for centralized management; furthermore, by providing a groove in the box to place the battery cell, the assembly speed is greatly improved, and it is convenient for plugging and unplugging. In addition, by providing a thermal conductive silicone between the groove and the battery cell, the heat dissipation speed can be greatly improved, and the battery cell can be fixed in the groove by its own adhesive force. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the stacking structure of the box body of Example 1 of the utility model;

[0018] Figure 2 yes Figure 1 A side view of the illustrated embodiment 1;

[0019] Figure 3 This is a schematic diagram of the internal structure of the box body of Example 1 of the utility model;

[0020] Figure 4 yes Figure 3 A side view of embodiment 1 is shown.

[0021] Description of the accompanying drawings:

[0022] 1. Battery cell; 2. Battery module; 3. Press plate; 4. Steel belt; 5. Box; 6. Wall; 7. Support bracket; 11. Pole; 21. Connecting bar; 31. Long screw; 51. Cover; 52. Module integral connecting bar; 511. Heat dissipation hole. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] Example 1

[0025] like Figure 1~Figure 2 As shown: a battery stacking structure, including a battery cell 1, a plurality of battery cells 1 are arranged and connected to form a battery module 2, the poles 11 of the battery cells 1 are arranged upward, and a buffer layer is filled between adjacent battery cells 1.

[0026] In this embodiment, the pole 11 of the battery cell is arranged upward, so that the bottom of the battery cell of the entire product is facing downward, and the electrolyte will sink to the bottom of the battery cell under the action of gravity, thereby solving the problem of the existing stacking structure causing the electrolyte to settle to the side of the battery cell due to gravity, and greatly improving the cycle life of the battery cell.

[0027] In this embodiment, the buffer layer is preferably buffer cotton. Buffer cotton is arranged between adjacent battery cells to facilitate the natural expansion of the battery cells, thereby reducing direct contact and collision between adjacent battery cells, thereby reducing the possibility of battery cell damage caused by vibration or external impact; and the softness and plasticity of the buffer cotton enable it to fill the gaps between the battery cells and better utilize the internal space of the battery.

[0028] like Figure 3~Figure 4 As shown: In this embodiment, after a plurality of battery cells are arranged to form a battery module 2, a pressing plate 3 is used at both ends of the battery module 2 to clamp the battery cells, and then a steel belt 4 is used to bind the entire battery module, and the pressing plate 3 and the battery module 2 are formed into a whole by the steel belt 4. Among them, the battery module 2 is arranged in a box body 5, and the pressing plate 3 of this embodiment is fixed to the box body 5 by a long screw 31, and each battery cell 1 is clamped and then fixed with a steel belt 4.

[0029] In this embodiment, a plurality of battery modules 2 may be arranged in the box 5. For example, in this embodiment, two layers of upper and lower battery modules 2 are arranged in the box. Both sides of each battery module 2 are provided with connection rows 21 for connecting the cells inside the battery module to form a series or parallel circuit. Both sides of the box 5 are provided with module integral connection rows 52 for connecting the communication and control signals between different battery modules, so that the BMS can uniformly manage and monitor the entire battery pack. Both sides of the box 5 are provided with covers 51 for protecting the wiring part, and the covers 51 are provided with heat dissipation holes 511 for timely heat dissipation of the battery modules in the box.

[0030] In this embodiment, the battery module 2 is placed in the box 5, and then stacked through the box 5, and a plurality of boxes are stacked up and down to form a stacking structure. When the box 5 is fixed to the wall 6, it can be fixed to the wall 6 by an L-shaped connector on at least one side of the box 5, that is, one end of the L-shaped connector is fixed to the wall 6 by an expansion screw, and the other end is fixed to the box 5 by a screw. In this way, the box can be locked on the wall to prevent the entire stacking structure from tipping over. A support bracket 7 is set at the bottom of the box at the bottom layer to support the entire structure.

[0031] This embodiment can greatly improve the stacking speed by placing the battery module in a box and then stacking the boxes. The box can also provide additional protection to protect the battery module from the external environment, such as dustproof, waterproof, shockproof, etc., thereby extending the service life of the battery module. Placing multiple battery modules inside the box and stacking them can achieve centralized management and monitoring, making it convenient to uniformly control and monitor the entire battery system.

[0032] Example 2

[0033] The difference from Example 1 is that the box is designed into a product with a specific shape and structure through a die-casting process, that is, a corresponding number of grooves are opened in the box according to the number of battery cells, and the battery cells are placed in the grooves one by one, and the poles of the battery cells are ensured to be set upward. In this way, there is no need to fix the pressing plate and the steel belt, and it is convenient to place the battery cells. Since the size of the grooves is matched according to the size of the battery cells, the battery cells are closely arranged in the box, which can minimize space waste; and the structural strength of the box is greatly improved after die-casting.

[0034] Thermally conductive silicone is arranged between the battery cell and the groove, which helps to quickly transfer the heat generated by the battery cell to the surface of the box and dissipate it, thereby improving the heat dissipation efficiency; and the thermally conductive silicone has a certain adhesion force, which can firmly fix the battery cell in the groove, enhance the mechanical strength of the battery system, prevent the battery cell from shifting or being damaged during transportation and use, and reduce the vibration of the battery cell.

[0035] The other structures are the same as those in Embodiment 1, that is, the stacking structure is formed by stacking boxes, which will not be described in detail here.

[0036] In summary, the utility model, on the one hand, installs the battery cell with the pole facing upward so that the electrolyte settles to the bottom of the battery cell under the action of gravity, thereby greatly improving the cycle life of the battery cell; on the other hand, by fixing the battery module in the box and then stacking through the box, the stacking speed is greatly improved, that is, the utility model can prefabricate the battery module in the box in advance, and when stacking on site, the box can be directly stacked. The battery module is protected by the box, has good safety, high reliability, and is convenient for centralized management; furthermore, by providing a groove in the box to place the battery cell, the assembly speed is greatly improved and it is convenient for plugging and unplugging. In addition, by providing thermal conductive silicone between the groove and the battery cell, the heat dissipation speed can be greatly improved, and the battery cell can be fixed in the groove through its own adhesive force.

Claims

1. A battery stack structure, comprising a battery cell, wherein a plurality of battery cells are arranged and connected to form a battery module; characterized in that: The poles of the battery cells are arranged upwards, the battery modules are arranged in a box, at least one battery module is accommodated in the box, and a plurality of boxes are stacked up and down to form a stacking structure.

2. The battery stack structure according to claim 1, characterized in that: A buffer layer is filled between adjacent battery cells.

3. The battery stack structure according to claim 1, characterized in that: The two ends of the battery module are clamped with pressing plates to clamp the battery core, and then the entire battery module is bound by a steel belt, and the pressing plate and the battery module are formed into a whole by the steel belt.

4. The battery stack structure according to claim 3, characterized in that: The pressing plate is fixed on the box body through a long screw.

5. The battery stack structure according to claim 1, characterized in that: The box body is die-cast with a plurality of grooves for placing battery cells, and the battery cells are placed in each groove one by one.

6. The battery stack structure according to claim 5, characterized in that: Thermally conductive silica gel is provided between the battery core and the groove.

7. The battery stack structure according to any one of claims 1 to 6, characterized in that: At least one side of the box is fixed to a wall or other platform via an L-shaped connector.

8. The battery stack structure according to any one of claims 1 to 6, characterized in that: Both sides of the battery module are provided with connection rows for connecting the battery cells inside the battery module to form a series or parallel circuit; both sides of the box body are provided with module integral connection rows for connecting the communication and control signals between different battery modules.

9. The battery stack structure according to claim 8, characterized in that: Cover bodies are arranged on both sides of the box body, and heat dissipation structures are arranged on the cover bodies.

10. The battery stack structure according to claim 2, characterized in that: The buffer layer is buffer cotton.

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