Small modular energy storage battery pack

Abstract

The invention discloses a small-sized modular energy storage battery pack, and relates to the technical field of energy storage battery packs, the small-sized modular energy storage battery pack is formed by combining a plurality of module batteries, each module battery comprises a shell, a plurality of lithium iron phosphate energy storage batteries are preset in the shell, and the bottom of the shell is also provided with a heat dissipation channel; and when a plurality of module batteries are connected, the interfaces of the short side boxes are connected through the connecting pipes, and the external cooling liquid supply equipment conveys cooling liquid to pass through the short side boxes and the heat dissipation channels and is collected and cooled by the collecting equipment. When a plurality of module batteries are connected, the external cooling liquid supply equipment conveys cooling liquid to pass through the short side box and the heat dissipation channel, and the collecting equipment collects the cooling liquid; and the cooling liquid flows in the heat dissipation channel, so that heat generated by the lithium iron phosphate energy storage battery can be taken away, and the temperature of the battery is in a controllable state. The battery pack can realize series connection, parallel connection or series-parallel connection according to different requirements, and the wiring mode is flexible.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage battery packs, and particularly to a small modular energy storage battery pack. Background Art

[0002] With the rapid development of renewable energy, energy storage technology has become an important means to solve energy storage and scheduling. As a common energy storage technology, lithium iron phosphate energy storage battery packs have the advantages of high energy density, long life, high efficiency, etc., and have gradually become the mainstream in the market.

[0003] However, lithium iron phosphate energy storage battery packs are prone to overheating problems during long-term high-load operation, which seriously affects their performance and life. To solve this problem, a modular lithium iron phosphate energy storage battery pack has emerged in the current market. By combining multiple battery modules together, the energy capacity and output power of the entire battery pack are improved. However, there are some problems with this modular design in terms of heat dissipation.

[0004] On the one hand, it is difficult to construct a good heat dissipation channel when installing existing modular battery packs. Due to a certain gap between each battery module, heat is difficult to conduct and dissipate effectively. This will cause uneven temperature inside the battery pack, and some battery modules are prone to overheating, thereby reducing the life and performance of the entire battery pack.

[0005] On the other hand, existing modular battery packs are connected in series or parallel when connected, and series or parallel each has its own advantages and disadvantages, which need to be adjusted according to different requirements. However, the produced batteries can only adopt one of the series or parallel methods and cannot be adjusted according to different subsequent connection methods of the batteries. As a result, when the battery pack is modularized, different series and parallel connections may lead to non-standard operations during the installation process, resulting in damage or destruction of the battery modules. Summary of the Invention

[0006] The purpose of the present invention is to provide a small modular energy storage battery pack. When multiple module batteries are connected, an external coolant supply device transports coolant through the short-side box and the heat dissipation channel and collects the coolant by a collection device; the coolant flows in the heat dissipation channel, which can take away the heat generated by the lithium iron phosphate energy storage battery and keep the temperature of the battery in a controllable state. The battery pack can achieve series, parallel, or series-parallel connection methods according to different requirements, and the wiring method is flexible to solve the above problems.

[0007] To achieve the above purpose, the present invention provides the following technical solution: A small modular energy storage battery pack, which is composed of a plurality of module batteries combined together, and each of the module batteries includes:

[0008] A housing, which is pre-installed with a plurality of lithium iron phosphate energy storage batteries inside, and a heat dissipation channel is also provided at the bottom of the housing;

[0009] The short-side box is symmetrically fixed on the width side of the housing. The short-side box communicates with the heat dissipation channel. Interfaces are provided on the corresponding two side surfaces of the short-side box, and end caps are assembled on the interfaces.

[0010] The long-side box is symmetrically fixed on the length side of the housing. A partition member is provided between the long-side box and the heat dissipation channel, and the partition member is used to partition the inner cavity of the long-side box from the heat dissipation channel.

[0011] When multiple said module batteries are connected, the interfaces of the short-side boxes are connected through connecting pipes. The external coolant supply device conveys coolant through the short-side boxes and the heat dissipation channel and the coolant is collected by the collection device.

[0012] The electrical connectors are provided on the four side surfaces of the housing, and adjacent electrical connectors are connected to be used for power-on between multiple said module batteries.

[0013] Furthermore, the housing includes an upper shell and a lower shell. The interior of the lower shell is horizontally partitioned by a partition board into an upper cavity and a lower cavity. The lithium iron phosphate energy storage battery is placed in the upper cavity, and the heat dissipation channel is arranged in the lower cavity.

[0014] Short cover plates and long cover plates are respectively fixed on the side surfaces of the upper shell. The short cover plate and the short-side box are assembled by bolts, and the long cover plate and the long-side box are assembled by bolts. The upper shell is used to seal the top opening of the lower shell.

[0015] Furthermore, the heat dissipation channel is in an "S" shape, and both ends of the heat dissipation channel are connected to the inner cavity of the short-side box.

[0016] Furthermore, the connection between the interface and the end cap is by threaded connection, flange connection and grooved connection.

[0017] Furthermore, the connection between the interface and the connecting pipe is by threaded connection, flange connection and grooved connection.

[0018] Furthermore, upper conducting wires are distributed on the bottom of the upper shell, and lower conducting wires are distributed on the top surface of the partition board. Both the upper conducting wires and the lower conducting wires are composed of staggered warp and weft threads. The intersection of the warp and weft threads of the upper conducting wires is connected to the positive electrode connector, and the intersection of the warp and weft threads of the lower conducting wires is connected to the negative electrode connector. The positive electrode connector and the negative electrode connector are respectively electrically connected to the positive and negative electrodes of the lithium iron phosphate energy storage battery.

[0019] Furthermore, the short-side box and the long-side box are arranged horizontally and aligned. The electrical connector includes an upper electrical connecting pipe, a lower electrical connecting pipe and an energizing member. The upper electrical connecting pipe and the lower electrical connecting pipe are respectively arranged on the upper shell and the lower shell, and the energizing member is arranged inside the upper electrical connecting pipe and the lower electrical connecting pipe.

[0020] Multiple of the module batteries are connected. The power-on takeovers and the adjacent power-on takeovers are connected through energizing members, and the power-off takeovers and the adjacent power-off takeovers are connected through energizing members, forming a parallel connection of multiple of the module batteries;

[0021] The power-on takeovers and the adjacent power-off takeovers are connected through energizing members, forming a parallel connection of multiple of the module batteries.

[0022] Furthermore, the energizing member includes an insulating spring, a telescopic tube, a conductive sheet and a conductive frame. The conductive sheet is connected to the telescopic tube. The insulating spring is sleeved on the telescopic tube and connected to the conductive sheet. The conductive frame is connected to the warp and weft. The conductive sheet is connected to the conductive frame through a wire.

[0023] Furthermore, the partition member includes an isolation tube and a solenoid valve. The isolation tube serves as the on-off of the connection between the long-side box and the heat dissipation channel, and the solenoid valve is arranged on the isolation tube.

[0024] The technical effects and advantages of the present invention:

[0025] 1. For the small modular energy storage battery pack of the present invention, when multiple module batteries are connected, the interfaces of the short-side boxes are connected through takeovers. The external coolant supply device conveys the coolant through the short-side boxes and the heat dissipation channels and the coolant is collected by the collection device; the coolant flows in the heat dissipation channels, which can take away the heat generated by the lithium iron phosphate energy storage batteries, keeping the temperature of the batteries in a controllable state.

[0026] 2. For the small modular energy storage battery pack of the present invention, multiple module batteries are connected. The power-on takeovers and the adjacent power-on takeovers are connected through energizing members, and the power-off takeovers and the adjacent power-off takeovers are connected through energizing members, forming a parallel connection of multiple module batteries; the power-on takeovers and the adjacent power-off takeovers are connected through energizing members, forming a series connection of multiple module batteries. Through the above structure, the battery pack can be connected in series, in parallel or in series-parallel according to different requirements, and the wiring method is flexible. Description of the Drawings

[0027] Figure 1 It is the structure diagram of the module battery of the present invention;

[0028] Figure 2 It is the separation diagram of the upper shell and the lower shell of the present invention;

[0029] Figure 3 It is the exploded view of the module battery of the present invention;

[0030] Figure 4 It is the structure diagram of the upper conductive wire of the upper shell of the present invention;

[0031] Figure 5 It is the connection diagram of the electrical connectors when the battery modules are connected in parallel of the present invention;

[0032] Figure 6This is a diagram of the electrical connectors when the battery modules of the present invention are connected in series;

[0033] Figure 7 The energy storage battery pack combination state 1 of the present invention;

[0034] Figure 8 The energy storage battery pack combination state 2 of the present invention;

[0035] Figure 9 This is the energy storage battery pack combination state three of the present invention.

[0036] In the figure:

[0037] 1. Shell; 11. Heat dissipation channel; 12. Upper shell; 121. Short cover plate; 122. Long cover plate; 123. Upper conductive wire; 13. Lower shell; 2. Short side box; 21. Interface; 22. Pipe; 23. Head; 3. Long side box; 4. Isolation tube; 5. Partition; 51. Lower conductive wire; 6. Electric connector; 61. Upper electrical pipe; 62. Lower electrical pipe; 63. Insulating spring; 64. Telescopic tube; 65. Conductive sheet; 66. Conductive frame; 7. Positive connector; 8. Negative connector. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] See also Figures 1-9 , a small modular energy storage battery pack, which is composed of a plurality of module batteries, each module battery includes:

[0040] The housing 1 has a plurality of lithium iron phosphate energy storage batteries pre-installed therein. A heat dissipation channel 11 is also provided at the bottom of the housing 1. The plurality of lithium iron phosphate energy storage batteries are arranged in a row. The heat dissipation channel 11 provided at the bottom is used for the flow of coolant. During the flow of the coolant, the heat of the lithium iron phosphate energy storage battery is taken away by heat exchange, thereby cooling the lithium iron phosphate energy storage battery to achieve the purpose of battery temperature control.

[0041] The short side box 2 is symmetrically fixed on the width side of the housing 1. The short side box 2 is connected to the heat dissipation channel 11. Interfaces 21 are provided on the corresponding two side surfaces of the short side box 2, and the interfaces 21 are equipped with sealing heads 23, which are used to seal the interfaces 21;

[0042] For different arrangements of module batteries, control the corresponding interface 21 to open. The connection methods of the takeover 22 and the end cap 23 are the same. When arranging different module batteries, control which interface 21 to open and which interface 21 to be sealed by the end cap 23, so that when forming a module battery pack for different arrangements of module batteries, the coolant can flow in the module battery pack.

[0043] The long side box 3 is symmetrically fixed on the length side of the housing 1. A partition member is provided between the long side box 3 and the heat dissipation channel 11. The partition member is used to partition the inner cavity of the long side box 3 and the heat dissipation channel 11. The partition member includes an isolation tube 4 and a solenoid valve. The isolation tube 4 serves as the on-off for connecting the long side box 3 and the heat dissipation channel 11, and the solenoid valve is arranged on the isolation tube 4;

[0044] In the normal state, the solenoid valve is used to seal the isolation tube 4, partitioning the heat dissipation channel 11 and the long side box 3. The coolant cannot flow into the long side box 3. When the heat dissipation needs to be increased, the solenoid valve opens the isolation tube 4, and part of the coolant flows into the long side box 3 and then into the heat dissipation channel 11, increasing the amount of coolant flowing into the module battery.

[0045] When multiple module batteries are connected, the interfaces 21 of the short side box 2 are connected through the takeovers 22. The external coolant supply device conveys the coolant through the short side box 2 and the heat dissipation channel 11 and the coolant is collected by the collection device;

[0046] The electrical connectors 6 are arranged on the four sides of the housing 1, and the adjacent electrical connectors 6 are connected for power supply between multiple module batteries.

[0047] The housing 1 includes an upper shell 12 and a lower shell 13. The interior of the lower shell 13 is horizontally partitioned by a partition 5 into an upper cavity and a lower cavity. The lithium iron phosphate energy storage battery is placed in the upper cavity, and the heat dissipation channel 11 is arranged in the lower cavity. The heat dissipation channel 11 is in an "S" shape, and both ends of the heat dissipation channel 11 are connected to the inner cavity of the short side box 2;

[0048] The coolant flows in the heat dissipation channel 11, which can take away the heat generated by the lithium iron phosphate energy storage battery and keep the temperature of the battery in a controllable state.

[0049] The side of the upper shell 12 is respectively fixed with a short cover plate 121 and a long cover plate 122. The short cover plate 121 and the short side box 2 are assembled by bolts, and the long cover plate 122 and the long side box 3 are assembled by bolts. The upper shell 12 is used to seal the top opening of the lower shell 13.

[0050] The upper shell 12 and the lower shell 13 are fixed on the four sides by bolts, which is convenient for replacement and disassembly. At the same time, the upper shell 12 and the lower shell 13 can also be welded to improve the connection strength by welding.

[0051] The interface 21 and the head 23 are connected by screw connection, flange connection and groove connection. The interface 21 and the nozzle 22 are connected by screw connection, flange connection and groove connection. The connection methods of the head 23 and the nozzle 22 are the same and are realized according to different assembly methods of the module batteries.

[0052] Upper conductive wires 123 are distributed on the bottom of the upper shell 12, and lower conductive wires 51 are distributed on the top surface of the partition 5. Both the upper conductive wires 123 and the lower conductive wires 51 are composed of staggered warp and weft lines. The intersections of the warp and weft lines of the upper conductive wires 123 are connected to the positive electrode connectors 7, and the intersections of the warp and weft lines of the lower conductive wires 51 are connected to the negative electrode connectors 8. The positive electrode connectors 7 and the negative electrode connectors 8 are respectively electrically connected to the positive and negative electrodes of the lithium iron phosphate energy storage battery.

[0053] The short side box 2 and the long side box 3 are arranged horizontally and aligned. The electrical connector 6 includes an upper electrical nozzle 61, a lower electrical nozzle 62 and an energizing member. The upper electrical nozzle 61 and the lower electrical nozzle 62 are respectively arranged on the upper shell 12 and the lower shell 13, and the energizing member is arranged inside the upper electrical nozzle 61 and the lower electrical nozzle 62;

[0054] When multiple module batteries are connected, the upper electrical nozzle 61 and the adjacent upper electrical nozzle 61 are connected by the energizing member, and the lower electrical nozzle 62 and the adjacent lower electrical nozzle 62 are connected by the energizing member to form a parallel connection of multiple module batteries;

[0055] The upper electrical nozzle 61 and the adjacent lower electrical nozzle 62 are connected by the energizing member to form a series connection of multiple module batteries.

[0056] The energizing member includes an insulating spring 63, a telescopic tube 64, a conductive sheet 65 and a conductive frame 66. The conductive sheet 65 is connected to the telescopic tube 64. The insulating spring 63 is sleeved on the telescopic tube 64 and connected to the conductive sheet 65. The conductive frame 66 is connected to the warp and weft lines. The conductive sheet 65 is connected to the conductive frame 66 through a wire.

[0057] Among them, the warp and weft lines are arranged on the conductive frame 66, and there is an electrical connection between the conductive frame 66 and the conductive sheet 65.

[0058] The energizing member further includes a wire. Both ends of the wire are closed by energizing sheets, and the two energizing sheets are connected by the wire. One end of the wire is connected to the upper electrical nozzle 61 or the lower electrical nozzle 62. The energizing sheet is connected to the conductive sheet 65 and compresses the insulating spring 63. The elastic force of the insulating spring 63 is used to improve the connection tightness between the energizing sheet and the conductive sheet 65, which can not only maintain the connection strength but also keep the battery pack always in an energized state.

[0059] When multiple module batteries are connected, both ends of the energizing member are used to connect the upper electrical nozzle 61 and the lower electrical nozzle 62 to realize a series connection of multiple module batteries.

[0060] Or the power-on takeover 61 and the power-on takeover 61, the power-on takeover 61 and the power-off takeover 62 are used to form multiple module batteries in parallel.

[0061] With the above structure, the battery pack can be connected in series, in parallel, or in series-parallel according to different requirements, and the wiring method is flexible.

[0062] The interior of the lower shell 13 is divided by a horizontal partition 5 into:

[0063] Upper cavity: Place lithium iron phosphate energy storage batteries (arranged in an array to ensure compactness).

[0064] Lower cavity: Built-in "S"-shaped heat dissipation channel 11 to maximize the coolant contact area.

[0065] Short side box 2 (width side):

[0066] Symmetrically distributed on both sides of the housing 1 and directly connected to the heat dissipation channel 11.

[0067] The two-side interfaces 21 can flexibly control the coolant flow direction through the end cap 23 (threaded / flanged / grooved connection) or the takeover 22 to adapt to different module arrangement methods.

[0068] Long side box 3 (length side): By default, it is isolated from the heat dissipation channel 11 by a partition member, including an isolation pipe 4 and a solenoid valve.

[0069] Heat dissipation on demand: When the solenoid valve is opened, the coolant is diverted to the long side box 3 to enhance the heat dissipation capacity.

[0070] Basic mode: The external coolant flows through the short side box 2 → "S"-shaped heat dissipation channel 11 → the other short side box 2 and flows out, directly cooling the bottom of the battery.

[0071] Enhanced mode: After the solenoid valve is opened, part of the coolant is diverted to the long side box 3 to increase the heat dissipation area to cope with high-load scenarios.

[0072] Dynamic adjustment: The solenoid valve can be automatically opened and closed according to the signal of the temperature sensor to achieve heat dissipation on demand.

[0073] Compatibility design: The short side box 2 is configured with (end cap 23 / takeover) to support series, parallel, or hybrid arrangements to ensure that the coolant covers all modules.

[0074] The upper conducting wire 123 and the lower conducting wire 51 are composed of staggered warp and weft lines to form a conducting wire grid. Conducting wire grid technology: The warp-weft layout reduces the internal resistance and improves the energy transmission efficiency. Positive connectors 7 and negative connectors 8 are set at the grid nodes and are respectively connected to the positive and negative electrodes of the battery to ensure stable power supply.

[0075] Support parallel connection (power-on takeover 61 - power-on takeover 61), series connection (power-on takeover 61 - power-off takeover 62) or hybrid connection to meet voltage / capacity requirements.

[0076] Electrical expansion freedom: Through the combination of electrical connectors 6, a large-capacity (parallel) or high-voltage (series) system can be quickly constructed. Series connection raises the voltage level and is suitable for electric vehicle charging stations and grid-level energy storage. Customized heat dissipation solution: By opening the long-side box 3 for heat dissipation, it can cope with high-temperature environments or high-power output requirements.

[0077] This design solves the core pain points of low heat dissipation efficiency and poor scalability of traditional battery packs through a modular architecture and intelligent control technology, and is suitable for future high-adaptability energy storage scenarios.

[0078] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A small modular energy storage battery pack, which is composed of multiple modular batteries, and is characterized in that: Each of the module batteries includes: A housing (1) with a plurality of lithium iron phosphate energy storage batteries pre - installed inside, and a heat dissipation channel (11) is further provided at the bottom of the housing (1); Short - side boxes (2) symmetrically fixed on the width sides of the housing (1), the short - side boxes (2) communicate with the heat dissipation channel (11), interfaces (21) are provided on the corresponding two sides of the short - side boxes (2), and a head (23) is assembled on the interfaces (21); Long - side boxes (3) symmetrically fixed on the length sides of the housing (1), a partition member is provided between the long - side boxes (3) and the heat dissipation channel (11), and the partition member is used to partition the inner cavity of the long - side boxes (3) from the heat dissipation channel (11); When multiple module batteries are connected, the interfaces (21) of the short - side boxes (2) are connected through connecting pipes (22), and an external coolant supply device transports coolant through the short - side boxes (2) and the heat dissipation channel (11) and the coolant is collected by a collection device; Electrical connectors (6) provided on the four sides of the housing (1), and adjacent electrical connectors (6) are connected for power supply between multiple module batteries.

2. The small modular energy storage battery pack according to claim 1, characterized in that, The housing (1) includes an upper shell (12) and a lower shell (13), the interior of the lower shell (13) is horizontally separated into an upper cavity and a lower cavity by a partition (5), the lithium iron phosphate energy storage batteries are placed in the upper cavity, and the heat dissipation channel (11) is provided in the lower cavity; Short cover plates (121) and long cover plates (122) are respectively fixed on the sides of the upper shell (12), the short cover plates (121) are assembled with the short - side boxes (2) by bolts, the long cover plates (122) are assembled with the long - side boxes (3) by bolts, and the upper shell (12) is used to seal the top opening of the lower shell (13).

3. A small modular energy storage battery pack according to claim 2, characterized in that, The heat dissipation channel (11) is in an "S" shape, and both ends of the heat dissipation channel (11) are connected to the inner cavity of the short - side boxes (2).

4. A small modular energy storage battery pack according to claim 3, characterized in that The connection between the interface (21) and the head (23) is by threaded connection, flange connection and grooved connection.

5. A small modular energy storage battery pack according to claim 4, characterized in that, The connection between the interface (21) and the connecting pipe (22) is by threaded connection, flange connection and grooved connection.

6. The small modular energy storage battery pack according to claim 5, wherein, Upper conducting wires (123) are distributed on the bottom of the upper shell (12), lower conducting wires (51) are distributed on the top surface of the partition (5), both the upper conducting wires (123) and the lower conducting wires (51) are composed of staggered warp and weft threads, the intersections of the warp and weft threads of the upper conducting wires (123) are connected to positive - pole connectors (7), the intersections of the warp and weft threads of the lower conducting wires (51) are connected to negative - pole connectors (8), and the positive - pole connectors (7) and the negative - pole connectors (8) are respectively electrically connected to the positive and negative poles of the lithium iron phosphate energy storage batteries.

7. A small modular energy storage battery pack according to claim 1, characterized in that, The short - side boxes (2) and the long - side boxes (3) are horizontally aligned, the electrical connectors (6) include upper electrical connecting pipes (61), lower electrical connecting pipes (62) and an energizing member, the upper electrical connecting pipes (61) and the lower electrical connecting pipes (62) are respectively provided on the upper shell (12) and the lower shell (13), and the energizing member is provided inside the upper electrical connecting pipes (61) and the lower electrical connecting pipes (62); Multiple of the module batteries are connected. The power-on takeover (61) and the adjacent power-on takeover (61) are connected through an energizing member. The power-off takeover (62) and the adjacent power-off takeover (62) are connected through an energizing member, forming a parallel connection of multiple of the module batteries; The power-on takeover (61) and the adjacent power-off takeover (62) are connected through an energizing member, forming a series connection of multiple of the module batteries.

8. A small modular energy storage battery pack according to claim 7, characterized in that The energizing member includes an insulating spring (63), a telescopic tube (64), a conductive sheet (65), and a conductive frame (66). The conductive sheet (65) is connected to the telescopic tube (64). The insulating spring (63) is sleeved on the telescopic tube (64) and connected to the conductive sheet (65). The conductive frame (66) is connected to the warp and weft. The conductive sheet (65) is connected to the conductive frame (66) through a wire.

9. The small modular energy storage battery pack according to claim 8, wherein The partition member includes an isolation tube (4) and a solenoid valve. The isolation tube (4) serves as the on-off of the connection between the long-side box (3) and the heat dissipation channel (11), and the solenoid valve is arranged on the isolation tube (4).

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