Energy storage battery module and battery pack

Abstract

The utility model provides an energy storage battery module. The energy storage battery module comprises end plates, side plates, spacers, insulating sheets, insulating strips and a plurality of battery cells, the battery cells are aligned and separated by the spacers to form a battery pack, the end plates and the side plates are arranged at two ends and two sides of the battery pack and are insulated from the battery pack, the insulating strip is arranged at the top of the battery pack, and the insulating strip is arranged at the bottom of the battery pack. The utility model further provides an energy storage battery pack which comprises the battery module, heat-conducting glue, a box body and a box cover. The heat-conducting glue is arranged between the bottom of the battery module and the box body, the box cover is connected to the box body, and the battery module is wrapped by the box body and the box cover. And through the box body and the box cover, the battery module can be well protected. And through the arranged heat-conducting glue, the bottom of the battery module can be in full contact with the box body, and heat dissipation of the battery module is facilitated.

Description

Technical Field

[0001] The utility model belongs to the field of new energy storage battery systems, in particular to an energy storage battery module and a battery pack. Background Art

[0002] With the rapid development of the global economy, some problems have arisen that cannot be ignored, such as global warming and the continuous consumption of non-renewable fossil energy. Energy depletion has become the primary problem plaguing the sustainable development of today's society. Accelerating the development of renewable energy has become the mainstream direction of global energy transformation.

[0003] Energy storage, as a key technology supporting the development of renewable energy, plays an important role in the power system. The electrochemical energy storage technology route stands out with its advantages such as short construction period, small geographical restrictions, and continuously reduced costs. Electrochemical energy storage is a kind of energy storage technology that stores electrical energy in chemical batteries and releases it when needed. Currently, lithium-ion batteries are the main ones. Compared with other energy storage methods, electrochemical energy storage has large capacity and fast response, and is one of the energy storage technologies with the greatest development potential today.

[0004] The use of energy storage batteries has strict requirements on capacity, safety and life. Overcooling or overheating will affect the battery cycle life. The temperature range for lithium-ion batteries to perform optimally is 10℃-35℃. At present, energy storage thermal management technologies are mainly divided into air cooling, liquid cooling, phase change cooling, etc. Phase change cooling technology is not yet mature, and the market is dominated by air cooling and liquid cooling.

[0005] Liquid cooling technology is widely used due to its advantages such as high thermal conductivity, more uniform heat dissipation and lower energy consumption. It utilizes efficient convection heat dissipation of coolant to remove heat from the battery system through circulation, thereby achieving the optimal operating temperature of the battery pack. Its biggest feature is its strong cooling capacity, unaffected by external conditions, and more precise control of battery temperature.

[0006] Liquid-cooled energy storage systems are not only safer and more economical, but also more suitable for large-capacity energy storage systems. Compared with traditional air-cooled container energy storage, the energy density is greatly improved. At the same time, it can also reduce system losses and save floor space. Energy storage liquid cooling technology has become the mainstream technical route in the energy storage market. Utility Model Content

[0007] In order to solve the deficiencies in the prior art, the utility model provides an energy storage battery module, including an end plate, a side plate, a spacer, an insulating sheet, an insulating strip and a plurality of battery cells.

[0008] Each battery cell is aligned and separated by a spacer to form a battery pack. The end plates and side plates are arranged at the two ends and two sides of the battery pack. The end plates and side plates are insulated from the battery pack. The insulating sheet is arranged at the top of the battery pack, and the insulating strip is arranged at the bottom of the battery pack. The ends of the battery pack refer to the two sides where more batteries are arranged.

[0009] The cells are separated by spacers to prevent short circuits. End plates and side plates are set around the battery pack to strengthen the overall structural strength. Insulation sheets and insulation strips are set at the top and bottom of the battery pack to prevent short circuits at the top and bottom of the battery pack.

[0010] Furthermore, the side plate is a metal plate, which makes the side plate stronger, and an insulating film is provided between the side plate and the battery pack to prevent a short circuit between the side plate and the battery pack.

[0011] Furthermore, the end plate is a metal plate, which makes the end plate stronger. A plastic plate is provided between the end plate and the battery pack, which can prevent short circuit on the one hand and prevent damage to the battery cell due to excessive extrusion on the other hand.

[0012] Furthermore, the separator is made of PP or aerogel, PP is cheaper and aerogel has better effect.

[0013] The utility model also provides an energy storage battery pack, comprising the above-mentioned battery module, thermal conductive adhesive, a box body and a box cover. The thermal conductive adhesive is arranged between the bottom of the battery module and the box body, and the box cover is connected to the box body, and the battery module is covered by the box body and the box cover.

[0014] The box body and the box cover can better protect the battery module. The thermal conductive glue can make the bottom of the battery module fully contact the box body, which is convenient for heat dissipation of the battery module.

[0015] Furthermore, a water cooling plate is also included, the water cooling plate includes a water nozzle and a flow channel, the water nozzle is arranged outside the box body, and the flow channel is arranged inside the box body. The water cooling plate is arranged between the thermal conductive glue and the box body, and the heat dissipation effect of the battery module is enhanced by arranging the water cooling plate.

[0016] Furthermore, a protective plate is provided at the bottom of the faucet to prevent the faucet from being deformed due to stress during transportation.

[0017] Furthermore, the battery module is provided with several parallel arranged in the box body, so that the box body can accommodate more battery cells. A crossbeam is provided in the box body, and the crossbeam is arranged between the water cooling plate and the bottom of the box body to strengthen the structure and make the water cooling plate evenly stressed. The flow channel includes a transverse flow channel and a longitudinal flow channel. The transverse flow channel avoids the position corresponding to the crossbeam to prevent the crossbeam from being squeezed at the stress position of the crossbeam, thereby affecting the heat dissipation effect.

[0018] Furthermore, silicone foam is provided between the crossbeam and the water-cooling plate to act as a buffer to prevent compression of the flow channel.

[0019] Furthermore, the outer surface of the bottom of the water-cooled plate is sprayed with polyurethane, which has heat insulation, waterproof, anti-corrosion and heat preservation effects.

[0020] This utility model has few components, a high degree of integration, high installation efficiency, and low manufacturing costs. The wet and dry separation inside the battery pack and the pipe-free design can avoid the risk of liquid leakage. The cold plate flow channel is designed reasonably and accurately, which can ensure that the battery cells perform optimally within a suitable temperature range. Adopting the mainstream modular liquid cooling technology can greatly reduce maintenance costs and extend the service life of the product.

[0021] This utility model can make the energy storage battery pack operate safely and reliably, energy-saving and environmental-friendly, better adapt to the high and low temperature external environment, and can be integrated into the entire container interior, adapt to the dimensions of today's mainstream container systems, and has a broad application market, which can create economic value for enterprises and society. Brief Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of this utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of the end plate and side plate of the battery module in this utility model;

[0024] Figure 2 It is a schematic structural diagram of the separator, insulating sheet and insulating strip of the battery module in this utility model;

[0025] Figure 3 It is a schematic structural diagram of the overall structure of the battery pack in this utility model;

[0026] Figure 4 It is a schematic structural diagram of the water-cooled plate of the battery pack in this utility model;

[0027] Figure 5 It is a schematic structural diagram of the cross beam of the battery pack in this utility model;

[0028] In the figure: 1. Battery module; 2. End plate; 3. Side plate; 4. Insulating sheet; 5. Insulating strip; 6. Battery cell; 7. Insulating film; 8. Plastic plate; 9. PP separator; 10. Aerogel separator; 11. Thermal conductive adhesive; 12. Box body; 13. Box cover; 14. Water-cooled plate; 15. Water nozzle; 16. Upper water-cooled plate; 17. Lower water-cooled plate; 18. Coolant; 19. Cross beam; 20. Transverse flow channel; 21. Longitudinal flow channel; 22. Rivet fixing hole; 23. Long rivet hole; 24. Protection plate. Detailed Embodiments

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0030] Embodiment 1:

[0031] Refer to Figure 1 、 Figure 2 In this embodiment, it is a battery module, including an end plate 2, a side plate 3, a separator, an insulating sheet 4, an insulating strip 5, and a plurality of battery cells 6.

[0032] Each battery cell 6 is aligned and arranged and separated by a separator to form a battery pack. In this embodiment, two rows of battery cells 6, with ten battery cells 6 in each row, are taken as an example.

[0033] The end plate 2 and the side plate 3 are arranged at both ends and both sides of the battery pack. The end plate 2 and the side plate 3 are insulated from the battery pack. Specifically, the side plate 3 is a metal plate, and an insulating film 7 is provided between the side plate 3 and the battery pack. The end plate 2 is a metal plate, and a plastic plate 8 is provided between the end plate 2 and the battery pack. On the one hand, it can prevent short circuit, and on the other hand, it can prevent damage to the battery cells 6 caused by excessive extrusion.

[0034] The insulating sheet 4 is arranged on the top of the battery pack to prevent short circuit at the top of the battery pack. The insulating strip 5 is arranged at the bottom of the battery pack for heat conduction in contact with the thermal conductive adhesive 11.

[0035] The separator is made of PP or aerogel. The price of PP is lower, and the effect of aerogel is better. In this embodiment, a 2-mm aerogel separator 10 and a PP separator 9 are sequentially arranged between every two battery cells 6. There are a total of 4 aerogel separators 10 and 5 PP separators 9 between each row of battery cells 6. While reducing the cost, the thermal runaway protection of the battery cells 6 can be taken into account. There is a long separator between each row of battery cells 6.

[0036] Embodiment 2:

[0037] Refer to Figure 3 In this embodiment, it is a battery pack, including the battery module 1, the thermal conductive adhesive 11, the box body 12, and the box cover 13 in the above embodiment. The thermal conductive adhesive 11 is arranged between the bottom of the battery module 1 and the box body 12. The box cover 13 is connected to the box body 12, and the battery module 1 is covered by the box body 12 and the box cover 13. Preferably, it further includes a water-cooling plate 14. The water-cooling plate 14 includes a water nozzle 15 and a flow channel. The water nozzle 15 is arranged outside the box body 12, and the flow channel is arranged inside the box body 12. Specifically, refer to Figure 4, the water-cooling plate 14 is composed of a water-cooling upper plate 16 and a water-cooling lower plate 17. The flow channels are arranged on the water-cooling lower plate 17, and a coolant 18 is provided in the flow channels. The water-cooling plate 14 is arranged between the thermal conductive adhesive 11 and the box body 12. By arranging the water-cooling plate 14, the heat dissipation effect of the battery module 1 is enhanced.

[0038] See Figure 5 , a plurality of battery modules 1 are provided and arranged in parallel in the box body 12. In this embodiment, five groups of battery modules 1 are taken as an example. A cross beam 19 is provided in the box body 12. The cross beam 19 is arranged between the water-cooling plate 14 and the bottom of the box body 12 to strengthen the overall structure and make the force on the water-cooling plate 14 uniform. The flow channels include a transverse flow channel 20 and a longitudinal flow channel 21. The transverse flow channel 20 avoids the position corresponding to the cross beam 19 to prevent the transverse flow channel 20 from being squeezed at the force-bearing position of the cross beam 19, thereby affecting the heat dissipation effect. Preferably, the transverse flow channel 20 is arranged at the position corresponding to the battery module 1 to make the cooling effect better.

[0039] In this embodiment, the box body 12 has riveting fixing holes 22 of different sizes in the length direction. The box cover 13 can be fixed on the box body 12 through rivets. There is a sealing ring between the box body 12 and the box cover 13 to ensure the airtightness of the whole battery pack. Each end plate 2 is fixed above the box body 12 through three long rivet holes 23. At the same time, in order to consider that the cold plate is not stressed and prevent the cold plate from being bent by force, there are six cross beams 19 at the bottom of the cold plate, which are arranged staggeredly with the flow channels and do not interfere with each other, maximizing the utilization of the bottom structure space.

[0040] A protective plate 24 is provided at the bottom of the water nozzle 15 to prevent the position of the water nozzle 15 from being deformed by force during transportation. A silica gel foam is provided between the cross beam 19 and the water-cooling plate 14 to play a buffering role and prevent the flow channels from being compressed, affecting the heat dissipation effect. The outer surface of the bottom of the water-cooling plate 14 is sprayed with polyurethane, which has the functions of heat insulation, waterproof, anti-corrosion and heat preservation.

[0041] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

Claims

1. A energy storage battery module, characterized in that, It includes end plates, side plates, separators, insulating sheets, insulating strips and a number of battery cells; the battery cells are aligned and separated by the separators to form a battery pack; the end plates and side plates are arranged at both ends and both sides of the battery pack, the end plates and side plates are insulated from the battery pack, the insulating sheet is arranged on the top of the battery pack, and the insulating strip is arranged on the bottom of the battery pack.

2. The energy storage battery module according to claim 1, wherein The side plate is a metal plate, and an insulating film is provided between the side plate and the battery pack.

3. The energy storage battery module according to claim 1, characterized in that The end plate is a metal plate, and a plastic plate is provided between the end plate and the battery pack.

4. The energy storage battery module according to claim 1, characterized in that The separator is made of PP or aerogel.

5. A energy storage battery pack, characterized in that, It includes the battery module as described in claim 1, thermal conductive adhesive, a box body and a box cover; the thermal conductive adhesive is provided between the bottom of the battery module and the box body, the box cover is connected to the box body, and the battery module is covered by the box body and the box cover.

6. The energy storage battery pack according to claim 5, characterized in that, It further includes a water-cooling plate, the water-cooling plate includes a water nozzle and a flow channel, the water nozzle is arranged on the outer side of the box body, and the flow channel is arranged on the inner side of the box body; the water-cooling plate is arranged between the thermal conductive adhesive and the box body.

7. The energy storage battery pack according to claim 6, wherein A protective plate is provided at the bottom of the water nozzle.

8. The energy storage battery pack according to claim 6, wherein A number of the battery modules are provided and arranged in parallel in the box body; a cross beam is provided in the box body, and the cross beam is arranged between the water-cooling plate and the bottom of the box body; the flow channel includes a transverse flow channel and a longitudinal flow channel, and the transverse flow channel avoids the position corresponding to the cross beam.

9. The energy storage battery pack according to claim 8, wherein, A silica gel foam is provided between the cross beam and the water-cooling plate.

10. The energy storage battery pack according to claim 6, wherein Polyurethane is sprayed on the outer surface of the bottom of the water-cooling plate.

Images