Movable energy storage device

Abstract

The utility model relates to a movable energy storage device which comprises a shell, a battery fixing frame is arranged in the shell, a battery module is arranged on the battery fixing frame, the battery module comprises a plurality of battery cells arranged on the battery fixing frame, each battery cell comprises a battery cell box used for containing a battery cell body, a partition frame is arranged between every two adjacent battery cell boxes, and the battery cells are arranged in the partition frames. And a plurality of battery cell positioning plates matched with the battery cell boxes are arranged on the partition frame. According to the mobile energy storage device disclosed by the utility model, the gaps are formed between the adjacent battery cells so as to improve the heat dissipation effect, and the expansion and extrusion between the battery cells can be prevented, so that the safety is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage batteries, in particular to a mobile energy storage device. Background Art

[0002] Lithium-ion mobile energy storage power supplies are widely used due to their advantages such as long life and high capacity. Existing energy storage power supplies, such as the energy storage power supply disclosed in the Chinese patent with publication number "CN221041252U" and titled "A battery pack and energy storage power supply", generally include a shell with a battery cavity, a plurality of battery cell assemblies are arranged in the shell, and a heat conducting member for heat conduction is located outside the battery cell assembly, and a heat dissipating member for heat dissipation is also arranged outside the heat conducting member. Among them, the battery cell assembly includes a plurality of battery cells stacked along a first direction.

[0003] Although the energy storage power supply of this structure is provided with heat-conducting parts and heat-dissipating parts for conducting heat and dissipating heat from the battery cells, the adjacent battery cells of the battery cell assembly are closely fitted, and the battery cells will generate a large amount of heat during use and charging. Although the heat-conducting parts and heat-dissipating parts can achieve a certain degree of heat dissipation for the battery cell assembly, some heat will still remain inside the battery cells. Therefore, as the use time increases, the heat inside the battery cells will gradually accumulate, and the volume of the battery cells will expand to a certain extent under the action of heat. The closely arranged battery cells are not only not conducive to further heat dissipation of the battery cells, but also reduce the heat dissipation speed of the battery cells and accelerate the cycle attenuation of the battery cells. More importantly, there will be squeezing between the expanded battery cells, which will cause certain safety hazards. Utility Model Content

[0004] In order to solve the technical problems of slow heat dissipation and expansion and extrusion of the battery cells caused by the close fit between the above-mentioned battery cells, the utility model provides a mobile energy storage device with gaps between adjacent battery cells to improve the heat dissipation effect and prevent expansion and extrusion between the battery cells, thereby having higher safety.

[0005] The mobile energy storage device of the utility model comprises a shell, a battery fixing frame is arranged in the shell, a battery module is arranged on the battery fixing frame, the battery module comprises a plurality of battery cells arranged on the battery fixing frame, the battery cell comprises a battery box for placing the battery cell body, a partition frame is arranged between adjacent battery boxes, and a plurality of battery cell positioning plates adapted to the battery box are arranged on the partition frame.

[0006] The advantage of this mobile energy storage device is that there is a partition frame between adjacent battery boxes, which not only fixes and positions the battery boxes, but also has a frame-type structure that allows a certain gap between the battery boxes of adjacent batteries. In this way, when the battery expands due to heat during use or charging, there is a certain expansion space between adjacent batteries so that they do not squeeze each other and cause risks. Moreover, the isolated batteries also allow the heat between the batteries to be better dissipated, thereby effectively avoiding accidents caused by thermal runaway of the batteries.

[0007] Furthermore, in the mobile energy storage device of the utility model, a heat dissipation layer is provided on the inner wall of the battery box.

[0008] The provision of the heat dissipation layer can further improve the heat dissipation effect on the battery cell, preventing it from being damaged or failing due to excessive heat.

[0009] Furthermore, in the mobile energy storage device of the utility model, a flame retardant layer is provided between adjacent battery boxes.

[0010] The flame retardant layer is provided to isolate adjacent battery cells, thereby reducing the impact of a battery cell on its adjacent battery cells and preventing the fire from spreading rapidly between adjacent battery cells.

[0011] Furthermore, in the mobile energy storage device of the utility model, the heat dissipation layer and the flame retardant layer are both made of graphite or ceramic wool.

[0012] Since graphite or ceramic wool has both heat dissipation and flame retardant functions, using graphite or ceramic wool to prepare the heat dissipation layer and the flame retardant layer can effectively achieve heat dissipation and flame retardant effects.

[0013] Furthermore, in the mobile energy storage device of the utility model, a battery cover is also provided in the shell, the battery module is arranged in the battery cover, and a sealing ring is provided at the open end of the battery cover, and the sealing ring is arranged on the inner wall of the shell.

[0014] The setting of the battery cover realizes the installation and protection of the battery module.

[0015] Furthermore, in the mobile energy storage device of the utility model, a plurality of heat dissipation fins are provided on the outer wall of the shell, and a heat-conducting silicone layer is provided between the shell and the battery module.

[0016] In conventional mobile energy storage power supplies, the battery module is in direct contact with the shell to achieve heat conduction and heat dissipation. The setting of the thermal conductive silicone layer not only realizes the thermal conductivity function of the conventional energy storage power supply to the battery module, but also, because the thermal conductive silicone layer is made of insulating and heat-conductive thermal conductive silicone, it can achieve the insulation function between the battery module and the shell, thereby further improving the thermal conductivity and safety performance of the mobile energy storage device.

[0017] The provision of the heat dissipation fins further improves the heat dissipation performance of the mobile energy storage device.

[0018] Furthermore, in the mobile energy storage device of the utility model, an inverter is also provided in the shell, and the inverter is fixed on the outer wall of the battery cover. A plurality of positioning pins are provided on the inner wall of the shell, and a plurality of positioning holes corresponding to the positioning pins are provided on the sealing ring.

[0019] The setting of the inverter realizes the function of converting direct current into alternating current, thereby improving the convenience of using the mobile energy storage device. A number of positioning pins on the inner wall of the shell and a number of corresponding positioning holes on the sealing ring realize the connection between the shell and the battery cover.

[0020] Furthermore, in the mobile energy storage device of the utility model, an air inlet is provided on the bottom wall of the shell, an air outlet is provided on the side wall at the top of the shell, and an exhaust fan is also provided at the air outlet of the shell.

[0021] An air inlet is arranged on the bottom wall of the shell, and an air outlet and an exhaust fan are arranged on the top of the shell, so that when the mobile energy storage device is working, the airflow can be input into the shell from the air inlet at the bottom of the shell under the action of the exhaust fan, and transmitted from bottom to top to the air outlets on both sides of the top of the shell, and finally discharged from the shell through the air outlet. While the airflow is discharged, it can dissipate heat for various components in the shell, such as the inverter, battery module, etc., thereby further improving the heat dissipation effect of the mobile energy storage device.

[0022] Furthermore, in the mobile energy storage device of the utility model, a battery holder located at the bottom of the battery box is provided in the battery box, a through hole penetrating the bottom wall of the battery box is provided on the bottom wall of the battery box, a connecting electrode is provided in the through hole, a tubular buffer pad is provided between the connecting electrode and the bottom wall of the battery box, one end of the connecting electrode is provided in the positioning groove of the battery holder, the other end of the connecting electrode is connected to the electrode fixing plate, the electrode fixing plate is provided in the installation box, and the electrode fixing plate and the installation box are both located on the outside of the bottom wall of the battery box.

[0023] The setting of the battery holder realizes the positioning function of the battery cell body, and it is also used to realize the positioning of the inner end of the connecting electrode. The setting of the connecting electrode realizes the connection between the battery cell and the external circuit. The setting of the tubular buffer pad realizes the buffering function between the connecting electrode and the battery cell box. The setting of the electrode fixing plate realizes the fixation and positioning of the outer end of the electrode.

[0024] Furthermore, in the mobile energy storage device of the utility model, a cavity is provided in the bottom wall of the battery box, and the cavity is filled with a flame retardant material.

[0025] The bottom wall of the battery box with a cavity and the flame retardant material arranged therein can further improve the safety of the mobile energy storage device. Similarly, the flame retardant material can be prepared from graphite or ceramic wool.

[0026] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it in accordance with the contents of the specification, the following embodiments of the utility model are described in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional diagram of a mobile energy storage device.

[0028] Figure 2 This is a disassembled diagram of a mobile energy storage device.

[0029] Figure 3 This is another disassembled diagram of the mobile energy storage device.

[0030] Figure 4 It is a three-dimensional view of the front half shell.

[0031] Figure 5 It is a three-dimensional view of the rear half shell.

[0032] Figure 6 It is a three-dimensional image of the battery cover.

[0033] Figure 7 This is a diagram of the coordination between the battery holder and the battery module.

[0034] Figure 8 This is a disassembled diagram of the battery holder and electromagnetic module.

[0035] Fig. 9 This is a disassembled diagram of the battery module.

[0036] Fig.10 It is a three-dimensional image of the partition frame.

[0037] Fig.11 It is a three-dimensional diagram of a battery box.

[0038] Fig.12 It is a cross-sectional view of the battery box.

[0039] Fig.13 yes Fig.12 A partial enlarged view of part A in the middle.

[0040] Fig.14 This is a disassembled diagram of the battery box.

[0041] In the figure, the shell 1, the battery fixing frame 2, the battery module 3, the battery box 4, the partition frame 5, the battery positioning plate 6, the fixing frame 7, the hoop 8, the protective plate 9, the protective block 10, the fixing hole 11, the battery cover 12, the front half shell 13, the rear half shell 14, the heat dissipation fin 15, the pull rod 16, the inverter 17, the positioning pin 18, the positioning hole 19, the air inlet 20, the air outlet 21, the exhaust fan 22, the mounting groove 23, the replaceable panel 24, the display screen 25, the battery holder 26, the connecting electrode 27, the tubular buffer pad 28, the positioning groove 29, the electrode fixing plate 30, the mounting box 31, the cavity 32, and the sealing ring 33. DETAILED DESCRIPTION

[0042] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0043] Example 1: See Figures 1 to 14 The mobile energy storage device of this embodiment includes a shell 1, a battery fixing frame 2 is provided in the shell, a battery module 3 is provided on the battery fixing frame, the battery module includes a plurality of battery cells arranged on the battery fixing frame, the battery cell includes a battery box 4 for placing the battery cell body, a partition frame 5 is provided between adjacent battery boxes, and a plurality of battery cell positioning plates 6 adapted to the battery boxes are provided on the partition frame.

[0044] The mobile energy storage device has partition frames between adjacent battery boxes. The partition frames not only fix and position the battery boxes, but also have a frame-shaped structure that allows a certain gap between the battery boxes of adjacent batteries. In this way, when the batteries expand due to heat during use or charging, there is a certain expansion space between adjacent batteries so that they do not squeeze each other and cause risks. Moreover, the isolated batteries also allow the heat between the batteries to be better dissipated, thereby effectively avoiding accidents caused by thermal runaway of the batteries.

[0045] The battery fixing frame is used to fix the battery module in the housing. In this embodiment, the battery fixing frame includes a fixing frame 7 provided at the open ends of a plurality of battery core boxes, and a hoop 8 wound around the middle and bottom of the battery module. The fixing frame and the hoop bundle a plurality of battery core boxes to form an integral battery module. A protective plate 9 may also be provided on one side of the fixing frame, and a protective block 10 is provided on the surface of the protective plate to protect the battery module and reduce the impact of external impact on it.

[0046] Preferably, the partition frame is a rectangular partition frame adapted to the battery box, and L-shaped battery cell positioning plates are respectively arranged at the four corners of the rectangular partition frame. During installation, the partition frame is arranged between two battery boxes, and its two sides are tightly fitted with the adjacent battery boxes, and the surface of the battery box is also in contact with the L-shaped battery cell positioning plate. Specifically, the two mutually perpendicular plates of the L-shaped battery cell positioning plate are in contact with the two adjacent side surfaces of the battery box, thereby realizing the positioning and installation of the battery box.

[0047] Preferably, fixing holes 11 for fixing the cell sampling harness and the temperature collection harness may also be provided on the bulkhead.

[0048] In summary, since a frame-type partition is installed between adjacent battery cells, the heat dissipation effect inside the battery module is improved. At the same time, when the battery cell expands to a certain extent due to excessive heat, the expanded side of the battery cell can pass through the middle hole of the partition frame, thereby effectively reducing the safety hazard caused by expansion and extrusion between adjacent battery cells and improving the overall safety performance of the mobile energy storage device.

[0049] Preferably, in the mobile energy storage device of this embodiment, a heat dissipation layer (not shown in the figure) is provided on the inner wall of the battery box.

[0050] The provision of a heat dissipation layer can further improve the heat dissipation performance of the battery cell and prevent it from being damaged or failing due to excessive heat.

[0051] Preferably, in the mobile energy storage device of this embodiment, a flame retardant layer (not shown in the figure) is provided between adjacent battery boxes.

[0052] The flame retardant layer is provided to isolate adjacent battery cells, thereby reducing the impact of a battery cell on its adjacent battery cells and preventing the fire from spreading rapidly between adjacent battery cells.

[0053] Preferably, in the mobile energy storage device of this embodiment, the heat dissipation layer and the flame retardant layer are both made of graphite or ceramic wool.

[0054] Since graphite or ceramic wool has both heat dissipation and flame retardant functions, using graphite or ceramic wool to prepare the heat dissipation layer and the flame retardant layer can effectively achieve heat dissipation and flame retardant effects.

[0055] The heat dissipation layer can be arranged around the battery body on the inner wall of the battery box, and the flame retardant layer can be arranged in the middle hole of the partition frame. The heat dissipation layer or flame retardant layer made of graphite or ceramic wool is soft, so it will not affect the expansion and deformation of the battery.

[0056] Preferably, in the mobile energy storage device of this embodiment, a battery cover 12 is further provided in the shell, the battery module is arranged in the battery cover, and a sealing ring 33 is provided at the open end of the battery cover, and the sealing ring is arranged on the inner wall of the shell.

[0057] The setting of the battery cover realizes the installation and protection of the battery module.

[0058] Preferably, the shell and the battery cover are both in the shape of a cuboid, the shell includes a front half shell 13 and a rear half shell 14, and the battery cover is arranged on the inner wall of the rear half shell through a sealing ring at the edge of its opening.

[0059] Preferably, in the mobile energy storage device of this embodiment, a plurality of heat dissipation fins 15 are provided on the outer wall of the shell, and a heat-conducting silicone layer is provided between the shell and the battery module.

[0060] In conventional mobile energy storage power supplies, the battery module is in direct contact with the shell to achieve heat conduction and heat dissipation. The setting of the thermal conductive silicone layer not only realizes the thermal conductivity function of the conventional energy storage power supply to the battery module, but also, because the thermal conductive silicone layer is made of insulating and heat-conductive thermal conductive silicone, it can achieve the insulation function between the battery module and the shell, thereby further improving the thermal conductivity and safety performance of the mobile energy storage device.

[0061] The provision of the heat dissipation fins further improves the heat dissipation performance of the mobile energy storage device.

[0062] In this embodiment, four groups of heat dissipation fins are arranged on the rear half of the shell, one group of heat dissipation fins is located in the middle of the pull rod 16, the other two groups of heat dissipation fins are arranged on the left and right sides of the pull rod, and the last group of heat dissipation fins is arranged horizontally at the bottom of the shell. The four groups of heat dissipation fins, together with the arrangement of the thermal conductive silicone layer, enable the heat generated by the battery module to be efficiently dissipated quickly through the thermal conductive silicone layer, the shell and the heat dissipation fins, avoiding thermal runaway due to heat accumulation.

[0063] In addition, in order to further achieve heat dissipation, heat sinks (not shown in the figure) can be arranged on the left and right sides of the battery module. The heat sink is located between the shell and the battery module and is directly connected to the shell. The heat on both sides of the battery module can be dissipated through the heat sink, the shell and the heat dissipation fins on the shell, thereby further improving the heat dissipation performance of the battery module.

[0064] At the same time, a liquid cooling device can be arranged between the battery module and the front half shell. Specifically, a liquid cooling plate (not shown in the figure) can be arranged between the battery module and the front half shell. A coil can be arranged in the liquid cooling plate. One end of the liquid cooling plate is provided with a liquid inlet and a liquid outlet respectively connected to the two ends of the coil. When working, the coolant enters the coil in the cooling plate from the liquid inlet and is then discharged from the liquid outlet, thereby cooling the battery module.

[0065] Preferably, in the mobile energy storage device of this embodiment, an inverter 17 is further provided in the shell, and the inverter is fixed on the outer wall of the battery cover. A plurality of positioning pins 18 are provided on the inner wall of the shell, and a plurality of positioning holes 19 corresponding to the positioning pins are provided on the sealing ring.

[0066] The setting of the inverter realizes the function of converting direct current into alternating current, thereby improving the convenience of using the mobile energy storage device. A number of positioning pins on the inner wall of the shell and a number of corresponding positioning holes on the sealing ring realize the connection between the shell and the battery cover.

[0067] During installation, the operator aligns the several positioning holes on the battery cover sealing ring with the positioning pins on the inner wall of the shell and inserts the positioning pins into the positioning holes. The operator can then press the inverter and battery cover against the inner wall of the rear half shell through the front half shell to secure the battery module.

[0068] Preferably, in the mobile energy storage device of this embodiment, an air inlet 20 is provided on the bottom wall of the shell, an air outlet 21 is provided on the side wall at the top of the shell, and an exhaust fan 22 is also provided at the air outlet of the shell.

[0069] An air inlet is arranged on the bottom wall of the shell, and an air outlet and an exhaust fan are arranged on the top of the shell, so that when the mobile energy storage device is working, the airflow can be input into the shell from the air inlet at the bottom of the shell under the action of the exhaust fan, and transmitted from bottom to top to the air outlets on both sides of the top of the shell, and finally discharged from the shell through the air outlet. While the airflow is discharged, it can dissipate heat for various components in the shell, such as the inverter, battery module, etc., thereby further improving the heat dissipation effect of the mobile energy storage device.

[0070] In this embodiment, the air inlet is arranged on the bottom wall of the front half shell, the air outlet is arranged on the top of the left and right side walls of the front half shell, and the top wall surface of the front half shell is provided with a mounting groove 23, and a replaceable panel 24 is provided in the mounting groove, on which various socket types can be freely combined, such as DC24V interface, USB-A, USB-C, XT and Anderson and other customized interfaces.

[0071] A display screen 25, buttons and other components may also be provided on the front half shell to facilitate operators to operate the mobile energy storage device.

[0072] Preferably, in the mobile energy storage device of this embodiment, a battery holder 26 located at the bottom of the battery box is provided in the battery box, a through hole penetrating the bottom wall of the battery box is provided on the bottom wall of the battery box, a connecting electrode 27 is provided in the through hole, a tubular buffer pad 28 is provided between the connecting electrode and the bottom wall of the battery box, one end of the connecting electrode is provided in a positioning groove 29 of the battery holder, and the other end of the connecting electrode is connected to an electrode fixing plate 30, the electrode fixing plate is provided in an installation box 31, the electrode fixing plate and the installation box are both located on the outside of the bottom wall of the battery box, and the installation box is fixed to the surface of the bottom wall of the installation box.

[0073] The setting of the battery holder realizes the positioning function of the battery cell body, and is also used to realize the positioning of the inner end of the connecting electrode. The setting of the connecting electrode realizes the connection between the battery cell and the external circuit. The setting of the tubular buffer pad realizes the buffering function between the connecting electrode and the battery cell box. The setting of the electrode fixing plate realizes the fixation and positioning of the outer end of the electrode.

[0074] During installation, the inner end of the connecting electrode is arranged in the positioning groove of the battery holder, and the outer end is arranged in the positioning hole of the electrode fixing plate. The arrangement of the installation box realizes the installation and positioning of the electrode fixing plate and the battery cell as a whole.

[0075] Preferably, in the mobile energy storage device of this embodiment, a cavity 32 is provided in the bottom wall of the battery box, and the cavity is filled with a flame retardant material.

[0076] The bottom wall of the battery box with a cavity and the flame retardant material arranged therein can further improve the safety of the mobile energy storage device. Similarly, the flame retardant material can be prepared from graphite or ceramic wool.

[0077] The above is only a preferred implementation of the utility model, which is used to assist those skilled in the art to implement the corresponding technical solution, and is not used to limit the scope of protection of the utility model. The scope of protection of the utility model is defined by the attached claims. It should be pointed out that for ordinary technicians in this field, on the basis of the technical solution of the utility model, several equivalent improvements and variations can be made, and these improvements and variations should also be regarded as the scope of protection of the utility model. At the same time, it should be understood that although this specification is described in accordance with the above-mentioned implementation mode, not every implementation mode contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions of each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A mobile energy storage device, comprising a housing (1), a battery fixing frame (2) disposed in the housing, and a battery module (3) disposed on the battery fixing frame, characterized in that: The battery module comprises a plurality of battery cells arranged on a battery fixing frame, the battery cells comprising a battery cell box (4) for accommodating the battery cell body, a partition frame (5) being arranged between adjacent battery cell boxes, and a plurality of battery cell positioning plates (6) being arranged on the partition frame and matching the battery cell boxes.

2. The mobile energy storage device according to claim 1, characterized in that: A heat dissipation layer is provided on the inner wall of the battery box.

3. The mobile energy storage device according to claim 1, characterized in that: A flame retardant layer is provided between adjacent battery boxes.

4. The mobile energy storage device according to claim 2 or 3, characterized in that: The heat dissipation layer and the flame retardant layer are both made of graphite or ceramic wool.

5. The mobile energy storage device according to claim 1, characterized in that: A battery cover (12) is also provided in the shell, the battery module is arranged in the battery cover, and a sealing ring (33) is provided at the open end of the battery cover, and the sealing ring is arranged on the inner wall of the shell.

6. The mobile energy storage device according to claim 5, characterized in that: A plurality of heat dissipation fins (15) are provided on the outer wall of the shell, and a heat-conducting silica gel layer is provided between the shell and the battery module.

7. The mobile energy storage device according to claim 5, characterized in that: An inverter (17) is also provided in the shell, and the inverter is fixed on the outer wall of the battery cover. A plurality of positioning pins (18) are provided on the inner wall of the shell, and a plurality of positioning holes (19) corresponding to the positioning pins are provided on the sealing ring.

8. The mobile energy storage device according to claim 1, characterized in that: An air inlet (20) is provided on the bottom wall of the shell, an air outlet (21) is provided on the side wall at the top of the shell, and an exhaust fan (22) is also provided at the air outlet of the shell.

9. The mobile energy storage device according to claim 1, characterized in that: The battery box is provided with a battery seat (26) located at the bottom of the battery box, the bottom wall of the battery box is provided with a through hole penetrating the bottom wall of the battery box, a connecting electrode (27) is provided in the through hole, a tubular buffer pad (28) is provided between the connecting electrode and the bottom wall of the battery box, one end of the connecting electrode is provided in a positioning groove (29) of the battery seat, and the other end of the connecting electrode is connected to an electrode fixing plate (30), the electrode fixing plate is provided in an installation box (31), and the electrode fixing plate and the installation box are both located outside the bottom wall of the battery box.

10. The mobile energy storage device according to claim 1, characterized in that: The bottom wall of the battery box is provided with a cavity (32), and the cavity is filled with a flame retardant material.

Images