Energy storage box and energy storage device

Abstract

The utility model provides an energy storage box and an energy storage device. The energy storage box comprises a box body; the battery module is arranged in the box body, the battery module comprises a plurality of battery modules, the plurality of battery modules are stacked along the longitudinal direction and are connected in series, the battery module comprises a plurality of rows of battery cells, the battery cells in each row are connected in parallel, and the battery cells in adjacent rows are connected in series; the busbars comprise a positive busbar and a negative busbar which are electrically connected with the battery cells respectively; a sealing cover covers the busbars and the battery modules; the internal cooling system is arranged in the box body, the internal cooling system comprises oil pumping equipment, and the oil pumping equipment communicates with the sealing cover and is used for pumping cooling oil into the sealing cover; the wiring port box is arranged in the box body, the wiring port box is located on the side, close to the busbar, of the sealing cover, and a wiring terminal electrically connected with the busbar is arranged in the wiring port box.The battery module is used for replacing the battery cluster and the battery modules to be stacked in the longitudinal direction, so that the box body can contain more layers of battery modules in the longitudinal direction.

Description

Technical Field

[0001] The utility model relates to the field of electric power equipment, in particular to an energy storage box and an energy storage device. Background Art

[0002] The energy storage box is an energy box with a built-in battery cluster. In traditional energy storage boxes, the PCS system and the battery cluster are placed in parallel, and there are gaps such as brackets between two adjacent battery clusters, resulting in low utilization of the energy storage box in the longitudinal direction. It is difficult to place multiple battery clusters in a limited space, which limits the power supply voltage of the energy storage box.

[0003] To this end, the present application provides a new energy storage box that can arrange multiple battery modules in a limited space, fully utilize the longitudinal space of the energy storage box, and provide a higher power supply voltage with the same specifications of energy storage. Utility Model Content

[0004] The utility model provides an energy storage box and an energy storage device, the purpose of which is to solve the problem of insufficient longitudinal space utilization of existing energy storage boxes.

[0005] In order to achieve the above-mentioned object, an embodiment of the present utility model provides an energy storage box, comprising:

[0006] Box;

[0007] a battery module disposed in the housing, the battery module comprising a plurality of battery modules stacked longitudinally and connected in series, the battery module comprising a plurality of rows of battery cells, the battery cells in each row being connected in parallel, and the battery cells in adjacent rows being connected in series;

[0008] The busbars include a positive busbar and a negative busbar, wherein the positive busbar is electrically connected to the positive electrode of the battery cell, and the negative busbar is electrically connected to the negative electrode of the battery cell; the busbars and the battery module outer cover are provided with a sealing cover;

[0009] An internal cooling system is disposed in the box, the internal cooling system including an oil pumping device, the oil pumping device is connected to the sealing cover and is used to pump cooling oil into the sealing cover, the oil pumping device is connected to the sealing cover at a side close to the bus bar;

[0010] The wiring port box is arranged in the box body, and the wiring port box is located on the side of the sealing cover close to the bus bar. The wiring port box is provided with wiring terminals, and the wiring terminals are electrically connected to the bus bar.

[0011] Preferably, a PCS system is further provided in the box, the PCS system is close to one side of the wiring port box, and the wiring terminals are electrically connected to the busbar through the PCS system.

[0012] Preferably, the box body is further provided with a fire protection system, and the fire protection system and the wiring port box are located on the same side of the battery module.

[0013] Preferably, two fire fighting systems are provided, both of which are arranged on opposite side walls of the box body, wherein one of the fire fighting systems includes a HFC-227ea fire extinguishing unit, and the other fire fighting system includes a water-based fire extinguishing unit.

[0014] Preferably, an air-conditioning system is also provided in the box, and the air-conditioning system and the wiring port box are located on the same side of the battery module. The air-conditioning system includes a temperature detection unit for detecting the temperature inside the box and a cooling unit. The cooling unit adjusts the working state based on the temperature signal of the temperature detection unit.

[0015] Preferably, the electrodes of the battery cells are arranged upward, and a connecting copper bus is provided above two adjacent rows of battery cells, wherein the connecting copper bus electrically connects the same electrodes of the battery cells in the same row in the length direction, and the connecting copper bus electrically connects the positive and negative electrodes of the battery cells in adjacent rows in the width direction;

[0016] The positive busbar is arranged on a side close to the wiring port box, and the positive busbar is electrically connected to the positive electrodes of a row of battery cells close to the wiring port box, and the negative busbar is electrically connected to the negative electrodes of a row of battery cells away from the wiring port box.

[0017] Preferably, each sealing cover is connected to an oil inlet branch pipe and an oil outlet branch pipe, a plurality of oil inlet branch pipes converge into an oil inlet pipe, a plurality of oil outlet branch pipes converge into an oil outlet pipe, and the oil outlet pipe and the oil inlet pipe are both connected to an oil pumping device;

[0018] A spectrum analysis unit is provided on each oil outlet pipe for analyzing the cooling oil flowing out of each battery module.

[0019] Preferably, the box body is made of heat-insulating and flame-retardant material.

[0020] Based on the same inventive concept, the present application also provides an energy storage device, which adopts the aforementioned energy storage box.

[0021] The above solution of the utility model has the following beneficial effects:

[0022] In this application, battery modules are used instead of battery clusters, so that the gaps in the battery clusters can be used to store battery modules. The battery modules are stacked in the longitudinal direction so that the box can accommodate more layers of battery modules in the longitudinal direction. At the same time, the battery modules adopt an intra-module cooling method, which reduces the longitudinal spacing between the battery modules while ensuring the heat dissipation effect.

[0023] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an external schematic diagram of the utility model;

[0025] Figure 2 It is an internal schematic diagram of the present utility model;

[0026] Figure 3 It is a schematic diagram of the battery module;

[0027] Figure 4 is a schematic diagram of the battery module;

[0028] Figure 5 yes Figure 4 A perspective view of part A;

[0029] Figure 6 yes Figure 4 Schematic diagram of part B;

[0030] Figure 7 yes Figure 4 Schematic diagram of part C.

[0031] [Description of Reference Numerals]

[0032] 10-Box,

[0033] 20-battery module, 21-battery module, 22-battery cell, 23-positive bus bar, 24-negative bus bar, 25-sealing cover, 26-connecting copper bus bar,

[0034] 30-Internal cooling system,

[0035] 40-wiring port box,

[0036] 50-PCS system,

[0037] 60- Fire protection system,

[0038] 70-Air conditioning system. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0040] like Figure 1-7As shown, an embodiment of the present invention provides an energy storage box, including a box body 10, which is made of a heat-insulating and flame-retardant material. A battery module 20 is arranged in the box body 10. The battery module 20 includes a battery module 21. There are multiple battery modules 21, and the multiple battery modules 21 are stacked longitudinally. The multiple battery modules 21 are glued to fix the battery modules 21. The multiple battery modules 21 are connected in series to superimpose the output voltage of the battery modules 21. Each battery module 21 includes several rows of battery cells 22, and each row is provided with multiple battery cells 22. The battery cells 22 in the same row are connected in parallel to increase the capacity, and the battery cells 22 in adjacent rows are connected in series to superimpose the output voltage. Each battery module 21 also includes a bus, which includes a positive bus 23 and a negative bus 24. The positive bus 23 is electrically connected to the positive pole of the battery cell 22, and the negative bus 24 is electrically connected to the negative pole of the battery cell 22. A sealing cover 25 is also provided outside the bus and the battery module 21. The sealing cover 25 wraps the bus and the battery module 21 in a sealed environment formed by the sealing cover 25.

[0041] An internal cooling system 30 is also provided in the energy storage box. The internal cooling system 30 includes an oil pumping device, which is connected to the sealing cover 25. It can pump cooling oil into the sealing cover 25 and can also extract the cooling oil in the sealing cover 25. The connection between the oil pumping device and the sealing cover 25 is located on the side of the sealing cover 25 close to the bus. Preferably, the internal cooling system 30 also includes an oil station and a compressor. The oil station is used to store cooling oil and provide cooling oil to the oil pumping device. The compressor cools down the cooling oil in the oil station to avoid the cooling oil pumped into the battery module 21 being at a high temperature. Preferably, the cooling oil is an oil liquid that does not react with the battery cell 22 and is non-conductive. Insulating oil is generally selected as the cooling oil.

[0042] A connection port box 40 is also provided within the housing 10. This connection port box 40 is also located on the side of the sealing cover 25 near the busbar. Connection terminals are provided within the connection port box 40. The connection terminals are electrically connected to the busbar and are used to connect to external electrical equipment. It is understood that there are two connection terminals, one electrically connected to the positive busbar 23 and the other electrically connected to the negative busbar 24.

[0043] In this application, the battery modules 21 are stacked vertically and fixed by gluing, eliminating the space required for heat dissipation and support in the original battery cluster. Therefore, under the box 10 of the same specifications, this application can accommodate more battery modules 21 in the vertical direction. At the same time, the battery modules 21 in this application are cooled by built-in cooling oil, so that the battery cells 22 are immersed in the cooling oil, and the cooling oil in the battery modules 21 is replaced by an oil pumping device, so that the battery modules 21 are in a stable temperature environment.

[0044] At the same time, since the battery cells 22 that need to be increased in capacity have been connected in parallel inside the battery module 21 in advance, the heat dissipation and support space between the horizontal battery clusters are also omitted.

[0045] Specifically, the electrode of each battery cell 22 in the battery module 21 is set upward, and the motor of the battery cell 22 includes a positive pole and a negative pole. A connecting copper bar 26 is provided above the battery cells 22 of two adjacent rows. In the length direction (i.e., the direction of the row) of the connecting copper bar 26, the same electrode of the battery cells 22 in the same row is electrically connected to the connecting copper bar 26. In this embodiment, the positive poles of the battery cells 22 in the same row are all electrically connected to the connecting copper bar 26. In the width direction of the connecting copper bar 26, the connecting copper bar 26 electrically connects the positive and negative poles of the battery cells 22 in the adjacent rows at the same time. In the length direction of the connecting copper bar 26, multiple battery cells 22 on the same row are connected in parallel by connection, and in the width direction of the connecting copper bar 26, multiple parallel battery cells 22 are connected in series again.

[0046] The aforementioned positive busbar 23 is disposed on one side of the sealed box near the junction box 40. The positive busbar 23 is electrically connected to the positive electrodes of the battery cells 22. Preferably, the positive busbar 23 is electrically connected to the positive electrodes of the battery cells 22 in a row near the junction box 40. The negative busbar 24 is electrically connected to the negative electrodes of the battery cells 22 in a row away from the junction box 40.

[0047] Each sealing cover 25 is connected to an oil inlet and outlet pipe. The inlet pipes converge to form an oil inlet pipe, and the outlet pipes converge to form an oil outlet pipe. The outlet and inlet pipes are connected to the oil pumping equipment. Each outlet pipe is equipped with a spectral analysis unit, which analyzes the cooling oil flowing through the outlet pipe to determine whether there is any abnormality in the battery module 21. Specifically, the spectral analysis unit analyzes the methane, ethylene, ethane, acetylene, carbon monoxide, carbon particles, and water content in the cooling oil, and issues an alarm if the content exceeds the set standard.

[0048] Furthermore, a PCS system 50 is provided within the housing 10. The PCS system 50 is located on one side of the housing 10 near the connection port box 40. Two connection terminals are electrically connected to the busbar through the PCS system 50. The PCS system 50 controls the charging and discharging of the battery module 20, performing AC / DC conversion, converting the DC power of the battery module 20 into AC power to power devices. It can also connect to the mains via the connection terminals, converting AC power into DC power for storage within the battery module 20, helping users optimize electricity costs and balance power needs.

[0049] Furthermore, a fire protection system 60 is provided within the housing 10 and is located on a side of the housing 10 near the connection port box 40. In this embodiment, two fire protection systems 60 are provided, located on opposite side walls of the housing 10. One of the fire protection systems 60 includes a heptafluoropropane fire extinguishing unit, and the other includes a water-based fire extinguishing unit.

[0050] In this embodiment, the two fire fighting systems 60 can adopt existing technologies. In the existing technology, the fire fighting system 60 also has a trigger unit. When the trigger unit detects an open flame or an abnormal temperature increase, the HFC-227ea fire extinguishing unit or the water-based fire extinguishing unit is activated to extinguish the fire.

[0051] An air-conditioning system 70 is also provided in the box body 10. The air-conditioning system 70 is located on the side of the box body 10 close to the wiring port box 40. The air-conditioning system 70 includes a temperature detection unit and a cooling unit. The temperature detection unit detects the temperature inside the box body 10 and transmits the temperature signal to the cooling unit. The cooling unit adjusts its own working state based on the temperature signal.

[0052] In this embodiment, the air conditioning system 70 may also use existing technology to control the environment in the box 10 to be in a constant temperature state, so as to prevent the power output of the battery module 20 from being affected by excessively high or low temperatures.

[0053] In this application, the PCS system 50, the fire protection system 60 and the air conditioning system 70 are all arranged on the side close to the wiring port box 40, while the internal cooling system 30 is arranged on the side away from the wiring port box 40, so that the heat can be directly dissipated outside the box without passing through the battery module 20, thereby avoiding the heat generated by the PCS system 50, the fire protection system 60 and the air conditioning system 70 from affecting the battery module 20.

[0054] The present application also provides an energy storage device, comprising the aforementioned energy storage box.

[0055] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An energy storage box, characterized in that: include: Box (10); A battery module (20) is arranged in the box (10), the battery module (20) includes a plurality of battery modules (21), the plurality of battery modules (21) are stacked in a longitudinal direction and the plurality of battery modules (21) are connected in series, the battery module (21) includes a plurality of rows of battery cells (22), the battery cells (22) in each row are connected in parallel, and the battery cells (22) in adjacent rows are connected in series; A busbar, comprising a positive busbar (23) and a negative busbar (24), wherein the positive busbar (23) is electrically connected to the positive electrode of the battery cell (22), and the negative busbar (24) is electrically connected to the negative electrode of the battery cell (22); a sealing cover (25) is provided on the busbar and the outer cover of the battery module (21); An internal cooling system (30) is provided in the housing (10), the internal cooling system (30) comprising an oil pumping device, the oil pumping device being in communication with the sealing cover (25) for pumping cooling oil into the sealing cover (25), the oil pumping device being in communication with the sealing cover (25) at a side close to the busbar; A connection port box (40) is arranged in the box body (10), and the connection port box (40) is located on a side of the sealing cover (25) close to the busbar. The connection port box (40) is provided with connection terminals, and the connection terminals are electrically connected to the busbar.

2. The energy storage box according to claim 1, characterized in that: A PCS system (50) is also provided in the box (10), and the PCS system (50) is close to one side of the connection port box (40), and the connection terminals and the busbar are electrically connected through the PCS system (50).

3. The energy storage box according to claim 2, characterized in that: The box body (10) is further provided with a fire protection system (60), and the fire protection system (60) and the connection port box (40) are located on the same side of the battery module (20).

4. The energy storage box according to claim 3, characterized in that: Two fire-fighting systems (60) are provided, and both fire-fighting systems (60) are provided on opposite side walls of the box (10). One of the fire-fighting systems (60) includes a heptafluoropropane fire-fighting unit, and the other fire-fighting system (60) includes a water-based fire-fighting unit.

5. The energy storage box according to claim 3, characterized in that: An air conditioning system (70) is also provided in the box (10). The air conditioning system (70) and the connection port box (40) are located on the same side of the battery module (20). The air conditioning system (70) includes a temperature detection unit for detecting the internal temperature of the box (10) and a cooling unit. The cooling unit adjusts its working state based on a temperature signal from the temperature detection unit.

6. The energy storage box according to claim 1, characterized in that: The electrodes of the plurality of battery cells (22) are arranged upward, and a connecting copper bus (26) is arranged above two adjacent rows of battery cells (22). The connecting copper bus (26) electrically connects the same electrodes of the battery cells (22) in the same row in the length direction, and the connecting copper bus (26) electrically connects the positive electrodes and negative electrodes of the battery cells (22) in adjacent rows in the width direction. The positive busbar (23) is arranged on a side close to the connection port box (40), and the positive busbar (23) is electrically connected to the positive electrodes of a row of battery cells (22) close to the connection port box (40), and the negative busbar (24) is electrically connected to the negative electrodes of a row of battery cells (22) away from the connection port box (40).

7. The energy storage box according to claim 6, characterized in that: Each sealing cover (25) is connected to an oil inlet branch pipe and an oil outlet branch pipe, a plurality of oil inlet branch pipes converge into an oil inlet pipe, a plurality of oil outlet branch pipes converge into an oil outlet pipe, and the oil outlet pipe and the oil inlet pipe are both connected to an oil pumping device; A spectrum analysis unit for analyzing the cooling oil flowing out of each battery module (21) is provided on each oil outlet branch pipe.

8. The energy storage box according to claim 1, characterized in that: The box body (10) is made of heat-insulating and flame-retardant material.

9. An energy storage device, comprising the energy storage box according to any one of claims 1 to 8.

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