Energy storage battery cluster

Abstract

The utility model provides an energy storage battery cluster which comprises a plurality of battery boxes which are sequentially connected in series. The battery rack is provided with a fixing table for fixing the battery box, and the battery box is arranged on the fixing table; a BMS master control board and BMS slave control boards, each BMS slave control board is connected with one battery box, and the BMS master control board is connected with the BMS slave control boards and can control the BMS slave control boards; according to the energy storage battery cluster disclosed by the utility model, the battery boxes can be more stably integrated into the battery cluster, and the safety of the battery cluster during use is greatly improved through structures such as protective liquid and a pressure release valve; and the battery cluster is more stable and safer in use.

Description

Technical Field

[0001] The utility model relates to the field of energy storage equipment, in particular to an energy storage battery cluster. Background Art

[0002] With the continuous increase in the installed capacity of new energy, the share of green energy in the energy field continues to increase, and the consumption of new energy power generation has become a major problem in the energy field. However, the current energy storage field, especially electrochemical energy storage headed by lithium battery energy storage, faces many problems. Most traditional lithium battery energy storage PACKs use forced air cooling, and some companies use water cooling plates for heat dissipation. Practice has shown that neither can reliably prevent thermal runaway of batteries. Utility Model Content

[0003] The utility model aims to provide an energy storage battery cluster, which makes the battery box installation more stable and avoids the occurrence of battery thermal runaway.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: an energy storage battery cluster, a battery box, a plurality of battery boxes, and the plurality of battery boxes are connected in series in sequence; a battery rack, the battery rack has a fixing platform for fixing the battery box, and the battery box is arranged on the fixing platform; a BMS main control board and a BMS slave control board, each of the BMS slave control boards is connected to one of the battery boxes, the BMS main control board is connected to the BMS slave control board and can control the BMS slave control board; a high-voltage box, the battery boxes are connected to the high-voltage box after being connected in series.

[0005] Furthermore, the battery box includes a box body, a fixing mechanism and a battery cell. The battery cell is fixed in the box body by the fixing mechanism. The box body carries a protective liquid, and the liquid level of the protective liquid is higher than the battery cell.

[0006] Furthermore, a window level gauge is provided on the box body, through which the liquid level of the protective liquid in the box body can be observed.

[0007] Furthermore, the battery box also includes a float level gauge and a liquid level indicator light. The float level gauge is arranged in the box body. The float level gauge can detect the liquid level in the box body. The float level gauge can also control the working state of the liquid level indicator light according to the detection result.

[0008] Furthermore, the battery box also includes a pressure relief valve, and the pressure relief valve is arranged on the box body.

[0009] Furthermore, the box body is provided with a positive connector and a negative connector, and the multiple battery cells in the box body are connected in series and are respectively connected to the positive connector and the negative connector, and the battery boxes are connected to each other through the positive connector and the negative connector.

[0010] Furthermore, a nut fixing piece is provided on the box body, a nut opening is provided on the fixing platform, and the box body is connected to the nut opening via the nut fixing piece.

[0011] Furthermore, the box body is provided with a liquid injection hole, through which the protective liquid can be injected into the box body.

[0012] Furthermore, the box body is provided with hanging ears and handles, the hanging ears are symmetrically arranged on the outer wall of the box body, and each of the hanging ears is provided with one of the handles.

[0013] Furthermore, the box body is made of steel.

[0014] From the analysis, it can be known that the utility model discloses an energy storage battery cluster, which can integrate the battery boxes into a battery cluster more stably, and greatly improves the safety of the battery cluster during use through structures such as protective liquid and pressure relief valve, making the battery cluster more stable and safe during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. Among them:

[0016] Figure 1 A schematic structural diagram of a battery box according to an embodiment of the utility model.

[0017] Figure 2 A schematic diagram of the internal structure of a battery box according to an embodiment of the utility model.

[0018] Figure 3 A schematic structural diagram of an embodiment of the utility model.

[0019] Explanation of the reference numerals: 1. Box body; 2. Battery cell; 3. Window level gauge; 4. Float level gauge; 5. Liquid level indicator light; 6. Pressure relief valve; 7. Positive connector; 8. Negative connector; 9. Nut fixing; 10. Hanging ear; 11. Handle; 12. Battery rack; 13. BMS slave control board; 14. Filling hole. DETAILED DESCRIPTION

[0020] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as a part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present invention includes such modifications and variations within the scope of the appended claims and their equivalents.

[0021] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. The terms "connected", "connected" and "set" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components; they can be wired electrical connections, radio connections, or wireless communication signal connections. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0022] One or more examples of the utility model are shown in the attached drawings. The detailed description uses numbers and letters to refer to the features in the drawings. Similar or similar marks in the drawings and descriptions have been used to refer to similar or similar parts of the utility model. As used herein, the terms "first", "second", "third", and "fourth" are used interchangeably to distinguish one component from another, and are not intended to indicate the position or importance of individual components.

[0023] like Figure 1-Figure 3As shown, according to an embodiment of the utility model, an energy storage battery cluster is provided, a battery box, the number of battery boxes is multiple, and the multiple battery boxes are connected in series in sequence; a battery rack 12, the battery rack 12 has a fixing platform for fixing the battery box, and the battery box is arranged on the fixing platform; a BMS main control board and a BMS slave control board 13, each BMS slave control board 13 is connected to a battery box, the BMS main control board is connected to the BMS slave control board 13 and can control the BMS slave control board 13; a high-voltage box, the battery box is connected to the high-voltage box after being connected in series, the battery rack 12 provides a fixed structure for the battery box, the number of battery boxes can be selected according to the specific usage scenario and the parameters of a single battery box, the battery box is usually arranged in a row greater than the number of columns to reduce the floor space, for example, when the total number of battery boxes is 24, the arrangement can be 8×3 or 6×4, the battery box is connected to the high-voltage box after being connected in series, and provides power to the working equipment after being processed by the high-voltage box, and the cooperation of the BMS main control board and the BMS slave control board 13 constitutes a management system for the battery box to realize the control of the battery box.

[0024] Preferably, the battery box includes a box body 1, a fixing mechanism and a battery cell 2, the battery cell 2 is fixed in the box body 1 by the fixing mechanism, and the box body 1 carries a protective liquid, the liquid level of the protective liquid is higher than the battery cell 2, the surface tension of the protective liquid is extremely low, and it is easy to penetrate into the pores. When the battery cell 2 of the battery is cracked or the safety valve of the battery cell 2 of the battery is opened due to external impact or internal pressure increase, the protective liquid can quickly penetrate into the battery cell 2, play a cooling, flame retardant, and isolation role, terminate the thermal runaway reaction inside the battery cell 2, and achieve the explosion suppression effect; due to the high heat dissipation performance and high fluidity of the protective liquid filled inside the battery module, the temperature in the battery packaging structure can be evenly circulated, effectively preventing the occurrence of local overheating, thereby greatly improving the thermal balance index of the lithium battery pack. Compared with the traditional air-cooled lithium battery pack, the service life of the battery pack can be extended. The battery cell 2 of the energy storage battery is completely immersed in the protective liquid, which has excellent insulation, flame retardancy, and thermal conductivity. It is directly immersed around the battery cell 2. When there is an abnormal situation that causes the temperature of the battery cell 2 to rise, the liquid can quickly take away the heat. The cascading thermal runaway chain reaction can be blocked, basically realizing the flame retardant protection function of the energy storage battery.

[0025] Preferably, a window level gauge 3 is provided on the box body 1, through which the liquid level of the protective liquid in the box body 1 can be observed. The window level gauge 3 can intuitively observe the liquid level of the protective liquid in the box body 1, which is convenient for the user to manage the operating status of the box body 1.

[0026] Preferably, the battery box also includes a float level gauge 4 and a liquid level indicator light 5. The float level gauge 4 is arranged in the box body 1. The float level gauge 4 can detect the liquid level in the box body 1. The float level gauge 4 can also control the working state of the liquid level indicator light 5 according to the detection result. The liquid level indicator light 5 can conveniently remind the user of the height of the protective liquid level in the box body 1, which is convenient for the staff to manage the battery box.

[0027] Preferably, the battery box also includes a pressure relief valve 6, which is arranged on the box body 1. The pressure relief valve 6 can automatically open to relieve pressure when the pressure inside the box body 1 is too high, thereby avoiding safety accidents such as explosion caused by excessive pressure inside the box body 1.

[0028] Preferably, a positive connector 7 and a negative connector 8 are provided on the box body 1. The multiple battery cells 2 in the box body 1 are connected in series and are respectively connected to the positive connector 7 and the negative connector 8. The battery boxes are connected to each other through the positive connector 7 and the negative connector 8. The positive connector 7 and the negative connector 8 facilitate the user to connect the battery boxes.

[0029] Preferably, a nut fixing part 9 is provided on the box body 1, a nut opening is provided on the fixing platform, and the box body 1 is connected to the nut opening through the nut fixing part 9. The nut fixing part 9 can fix the battery box on the battery rack 12, thereby preventing the battery box from falling off due to accidental collision.

[0030] Preferably, the box body 1 is further provided with a liquid injection hole 14, through which the protective liquid can be injected into the box body 1, and the liquid injection hole 14 can inject the protective liquid.

[0031] Preferably, the box body 1 is also provided with hanging ears 10 and handles 11. The hanging ears 10 are symmetrically arranged on the outer wall of the box body 1. Each hanging ear 10 is provided with a handle 11. The hanging ears 10 and the handles 11 are convenient for users to move and install the battery box.

[0032] Preferably, the box body 1 is made of steel, is completely sealed, and has a certain protective compressive strength.

[0033] From the above description, it can be seen that the above-mentioned embodiments of the utility model achieve the following technical effects: the steel sealed box body is adopted, which has good protection and pressure resistance, and can play a certain protective role to the surrounding when the battery cell explodes. The surface tension of the protective liquid is extremely low, and it is easy to penetrate into the pores. When the external force impacts or the internal pressure increases, causing the battery cell to crack or the battery cell safety valve to open, the protective liquid can quickly penetrate into the battery cell, play a cooling, flame retardant, and isolation role, terminate the thermal runaway reaction inside the battery cell, and achieve the explosion suppression effect; due to the high heat dissipation performance and high fluidity of the protective liquid filled inside the battery PACK, the temperature in the battery package can be evenly circulated, effectively preventing the occurrence of local overheating, thereby greatly improving the thermal balance index of the lithium battery pack. Compared with the traditional air-cooled lithium battery pack, it can effectively extend the service life of the battery pack. The immersion protection method completely immerses the energy storage battery cell in the protective liquid. The protective liquid has excellent insulation, flame retardancy, and thermal conductivity. It is directly immersed around the battery cell. When there is an abnormal situation that causes the temperature of the battery cell to rise, the liquid can quickly take away the heat. Liquid vaporization can take away most of the energy of the electrochemical reaction, thus blocking the cascade thermal runaway chain reaction, basically realizing the flame retardant protection function of the energy storage battery.

[0034] Compared with the prior art, the utility model can integrate the battery boxes into a battery cluster more stably, and greatly improves the safety of the battery cluster during use through structures such as protective liquid and pressure relief valve, making the battery cluster more stable and safe during use.

[0035] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An energy storage battery cluster, characterized in that: include: A battery box, wherein the number of the battery boxes is multiple, and the multiple battery boxes are connected in series in sequence; A battery rack, wherein the battery rack has a fixing platform for fixing the battery box, and the battery box is arranged on the fixing platform; A BMS master control board and a BMS slave control board, each of the BMS slave control boards is connected to one of the battery boxes, and the BMS master control board is connected to the BMS slave control board and can control the BMS slave control board; A high voltage box, wherein the battery boxes are connected in series to the high voltage box.

2. The energy storage battery cluster according to claim 1, characterized in that: The battery box comprises a box body, a fixing mechanism and a battery cell. The battery cell is fixed in the box body by the fixing mechanism. A protective liquid is carried in the box body, and the liquid level of the protective liquid is higher than that of the battery cell.

3. The energy storage battery cluster according to claim 2, characterized in that: The box body is provided with a window level gauge, through which the liquid level of the protective liquid in the box body can be observed.

4. The energy storage battery cluster according to claim 2, characterized in that: The battery box also includes a float level gauge and a liquid level indicator light. The float level gauge is arranged in the box body. The float level gauge can detect the liquid level in the box body. The float level gauge can also control the working state of the liquid level indicator light according to the detection result.

5. The energy storage battery cluster according to claim 2, characterized in that: The battery box further comprises a pressure relief valve, and the pressure relief valve is arranged on the box body.

6. The energy storage battery cluster according to claim 2, characterized in that: The box body is provided with a positive connector and a negative connector, and the multiple battery cells in the box body are connected in series and are respectively connected to the positive connector and the negative connector, and the battery boxes are connected to each other through the positive connector and the negative connector.

7. The energy storage battery cluster according to claim 2, characterized in that: The box body is provided with a nut fixing piece, the fixing platform is provided with a nut opening, and the box body is connected with the nut opening through the nut fixing piece.

8. The energy storage battery cluster according to claim 2, characterized in that: The box body is also provided with a liquid injection hole, through which protective liquid can be injected into the box body.

9. The energy storage battery cluster according to claim 2, characterized in that: The box body is also provided with hanging ears and handles. The hanging ears are symmetrically arranged on the outer wall of the box body, and each of the hanging ears is provided with one of the handles.

10. The energy storage battery cluster according to claim 2, characterized in that: The material of the box is steel.

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