CN111653720A - An energy storage battery module and a cascade utilization system - Google Patents

Abstract

The invention discloses an energy storage battery module and a cascade utilization system. The energy storage battery module comprises: a plurality of energy storage battery modules, the energy storage battery modules are composed of several energy storage battery cells in series and parallel; The row is connected to the positive output terminals of the plurality of energy storage battery modules; the negative bus bar is connected to the negative output terminals of the plurality of energy storage battery modules. In this way, by connecting the positive output end of the energy storage battery module to the positive bus bar, and the negative output end to the negative bus bar, the multiple energy storage battery modules do not need to be connected by flexible wires. After a plurality of energy storage battery modules are connected through the positive and negative bus bars, a short circuit will not occur due to a certain distance between the positive and negative bus bars, thus solving the problem between the positive and negative electrodes of the energy storage battery modules. short-circuit fault.

Description

An energy storage battery module and a cascade utilization system

technical field

The invention relates to the technical field of large-scale energy storage, in particular to an energy storage battery module and a cascade utilization system.

Background technique

At present, in the field of large-scale energy storage at the megawatt level, the applied energy storage battery module is usually installed in a battery socket, and the energy storage battery module will be compactly integrated in the closed casing of the battery socket. In this kind of battery box, the energy storage battery module usually uses connecting cables to connect the positive and negative terminals of adjacent battery cells in series and parallel, and finally connect the positive and negative terminals of the energy storage battery module to the connection terminals through cables. .

Because in the field of large-scale energy storage, many battery insertion boxes equipped with energy storage battery modules are required, and in order to save space and facilitate operation, multiple battery insertion boxes are usually arranged adjacent to each other. When multiple battery sockets need to be combined in parallel, technicians generally use flexible wires to connect the positive output terminals and negative output terminals of the multiple battery sockets together, so as to realize the convergence of multiple battery sockets.

However, as shown in Figure 1, when a flexible wire is used for guiding, it will inevitably cause the wires to overlap each other. In this type of confluence mode, the safety distance between the positive output terminal and the negative output terminal is small. When a large current flows through the lead flexible wire, the insulation performance between the flexible wires decreases with the increase of use time, and it is easy to A short-circuit fault between the positive and negative poles has occurred.

SUMMARY OF THE INVENTION

Therefore, the technical problem to be solved by the present invention lies in the fact that when the battery sockets equipped with the energy storage battery modules in the prior art are combined, with the increase of the use time, the positive and negative electrodes of the energy storage battery modules are easily short-circuited. question. Thus, an energy storage battery module and a cascade utilization system are provided.

In order to achieve the above object, an embodiment of the present invention provides an energy storage battery module, the energy storage battery module includes: a plurality of energy storage battery modules, and the energy storage battery module is composed of a number of energy storage battery cells in series and parallel A positive bus bar is connected to the positive output ends of the plurality of energy storage battery modules; the negative electrode bus bar is connected to the negative output ends of the plurality of energy storage battery modules.

Optionally, the positive output terminal and the negative output terminal are disposed on both sides of the energy storage battery module opposite to each other.

Optionally, the energy storage battery module further includes: a protector arranged between the positive output end and the positive bus bar, and/or between the negative output end and the negative bus bar .

Optionally, the protector is a circuit breaker or a fuse.

An embodiment of the present invention further provides a cascade utilization system, which includes: the energy storage battery module according to any one of the above; and a battery rack, wherein the battery rack is suitable for placing the energy storage battery module.

Optionally, the battery rack includes: a plurality of support racks, the support racks are provided with a plurality of battery cavities connected to each other, the battery cavities are suitable for placing the energy storage battery modules, each of the battery cavities The part corresponding to the energy storage battery unit is provided with a disassembly and assembly port.

Optionally, the positive electrode busbar and the negative electrode busbar are arranged on the battery rack.

Optionally, the battery rack further comprises: a top plate arranged on the top of the battery rack and adapted to close the top of the battery rack; a plurality of cabinet boards arranged on one or more sides of the battery rack; A plurality of cabinet doors are rotatably arranged on the battery rack and are adapted to close the battery cavity.

Optionally, the top board, the cabinet board and the cabinet door are made of transparent materials.

Optionally, the cabinet board and the cabinet door are provided with a heat dissipation area suitable for the heat dissipation of the energy storage battery module.

Compared with the prior art, the technical solution of the present invention has the following advantages:

1. An embodiment of the present invention provides an energy storage battery module, the energy storage battery module includes: a plurality of energy storage battery modules, the energy storage battery module is composed of several energy storage battery cells in series and parallel; The row is connected to the positive output terminals of the plurality of energy storage battery modules; the negative bus bar is connected to the negative output terminals of the plurality of energy storage battery modules.

In this way, by connecting the positive output end of the energy storage battery module to the positive bus bar, and the negative output end to the negative bus bar, the multiple energy storage battery modules do not need to be connected by flexible wires. After multiple energy storage battery modules are connected through the positive and negative bus bars, a short circuit will not occur due to a certain distance between the positive and negative bus bars, thus solving the problem between the positive and negative electrodes of the energy storage battery modules. short-circuit fault.

2. In the present invention, by arranging the positive output terminal and the negative output terminal on both sides of the energy storage battery module, the distance between the positive bus bar and the negative electrode bus bar can be increased to the greatest extent, thereby ensuring the positive and negative of the energy storage battery module. No short-circuit fault occurs between poles.

3. By setting the protector in the present invention, when a fault occurs inside the energy storage battery module, the circuit can be disconnected, so as to protect the energy storage battery module. In addition, since the energy storage battery module of the present application is open-type compared to the battery insert box in the prior art, when a fault occurs inside the energy storage battery module, the faulty energy storage battery cell can be replaced without the need for Replace the entire energy storage battery module. Moreover, when the battery capacity of the energy storage battery cell decays below the preset value of the rated capacity, the protector is directly disconnected, and the energy storage battery cell is replaced, so that the replaced energy storage battery cell can be replaced. Resource processing to realize the cascade utilization of energy storage battery cells.

4. The present invention also provides a cascade utilization system, the cascade utilization system comprising: the energy storage battery module according to any one of the above; and a battery rack, wherein the battery rack is suitable for placing the energy storage battery module.

In this way, the energy storage battery cells can be placed on the battery rack assembled on site, and the technicians can flexibly connect the energy storage battery cells in series and parallel according to the needs of different application scenarios and the actual situation to form energy storage batteries of different powers. module. In addition, it is also convenient for technicians to replace the energy storage battery cells at any time in the later stage. Therefore, the replaced energy storage battery cells can be treated as resources, and the cascade utilization of the energy storage battery cells can be realized.

5. In the present invention, by arranging the positive electrode busbar and the negative electrode busbar on the battery rack, the distance between the positive electrode and the negative electrode of the energy storage battery module can be widened to the greatest extent, and the energy storage battery can also be avoided. The fault of short circuit between the positive and negative poles of the module is easy to occur.

6. The present invention can ensure that the energy storage battery module is not affected by dust and impurities in the surrounding environment when the energy storage battery module works normally on the battery rack by setting the top plate, the cabinet plate and the cabinet door, and can better ensure the energy storage battery module. The normal work of the group. At the same time, the setting of the cabinet door is also convenient for technicians to replace the energy storage battery cells on the battery rack.

7. In the present invention, the top plate, the cabinet plate and the cabinet door are made of transparent materials, so that the technician can observe the working state of the energy storage battery module on the battery rack in real time, thereby improving the working efficiency of the technician.

8. The present invention can ensure that the heat generated by the energy storage battery module can be dissipated to the outside in time by setting the heat dissipation area on the cabinet board and the cabinet door, thereby ensuring the normal operation of the energy storage battery module.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For ordinary workers in the art, other drawings can also be obtained from these drawings without any creative effort.

Fig. 1 is the structural representation of confluence in the prior art;

FIG. 2 is a schematic structural diagram of an embodiment of the present invention.

Reference number:

1-Energy storage battery cell; 2-Energy storage battery module; 3-Protect; 4-Positive busbar; 5-Negative busbar; 6-Power load; 7-Battery rack.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary workers in the art without creative work fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two components, which can be a wireless connection or a wired connection connect. For ordinary workers in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Because in the field of large-scale energy storage, many battery insertion boxes equipped with energy storage battery modules are required, and in order to save space and facilitate operation, multiple battery insertion boxes are usually arranged adjacent to each other. When multiple battery sockets need to be combined in parallel, technicians generally use flexible wires to connect the positive output terminals and negative output terminals of the multiple battery sockets together, so as to realize the convergence of multiple battery sockets. However, as shown in Figure 1, when a flexible wire is used for guiding, it will inevitably cause the wires to overlap each other. In this type of confluence mode, the safety distance between the positive output terminal and the negative output terminal is small. When a large current flows through the lead flexible wire, the insulation performance between the flexible wires decreases with the increase of use time, and it is easy to A short-circuit fault between the positive and negative poles has occurred.

Example 1

As shown in FIG. 2 , an embodiment of the present invention provides an energy storage battery module. The energy storage battery module includes: a plurality of energy storage battery modules 2 , a positive electrode bus bar 4 and a negative electrode bus bar 5 .

The energy storage battery module 2 is composed of a number of energy storage battery cells 1 in series and parallel. The energy storage battery module 2 is formed with a positive output terminal and a negative output terminal, and there is a certain distance between the positive output terminal and the negative output terminal. The positive output terminals of all the energy storage battery modules 2 are all connected to the positive bus bar 4 , and the negative output terminals of all the energy storage battery modules 2 are all connected to the negative bus bar 5 . Since there is a certain distance between the positive output end and the negative output end, there is also a certain distance between the positive bus bar 4 and the negative bus bar 5 . The distance can be determined by those skilled in the art according to the actual situation.

In this way, by connecting the positive output end of the energy storage battery module 2 to the positive bus bar 4, and the negative output end to the negative bus bar 5, the plurality of energy storage battery modules 2 do not need to be connected by flexible wires. After the plurality of energy storage battery modules 2 are connected through the positive bus bar 4 and the negative electrode bus bar 5, since there is a certain distance between the positive electrode bus bar 4 and the negative electrode bus bar 5, a short circuit will not occur, thus solving the problem of energy storage. Short circuit fault between the positive and negative poles of battery module 2.

Optionally, in some embodiments of the present invention, the positive output terminal and the negative output terminal of the energy storage battery module 2 are disposed opposite to both sides of the energy storage battery module 2 .

This confluence method widens the distance between the positive and negative poles of the energy storage battery module 2, and further widens the distance between the drawn out bus bars. The safety distance and strength of the bus bars are improved, and the mutual support between the carriers is avoided. The overlapped condition reduces the risk of short circuits.

By arranging the positive output terminal and the negative output terminal on both sides of the energy storage battery module 2 opposite to each other, the present invention can increase the distance between the positive electrode bus bar 4 and the negative electrode bus bar 5 to the greatest extent, thereby ensuring the energy storage battery module 2 There will be no short circuit fault between positive and negative poles.

Optionally, in some embodiments of the present invention, the energy storage battery module further includes a protector 3, and the protector 3 is arranged between the positive output end and the positive bus bar 4, and between the negative output end and the negative bus bar 5. between.

Of course, the protector 3 may also be arranged only between the positive output end and the positive bus bar 4 or between the negative output end and the negative bus bar 5 . This embodiment is only for illustration, and does not limit the installation position of the protector 3 . Persons skilled in the art can change the setting position of the protector 3 according to the actual situation, and only need to be able to play a corresponding protective role.

The protector 3 may be a circuit breaker and a fuse connected in series. Of course, the protector 3 can also be a separate circuit breaker or fuse.

By setting the protector 3 in the present invention, when a fault occurs inside the energy storage battery module 2 , the circuit can be disconnected, so as to protect the energy storage battery module 2 . In addition, since the energy storage battery module 2 of the present application is open-type compared to the battery insert box in the prior art, when a fault occurs inside the energy storage battery module 2, the faulty energy storage battery cell 1 can be processed. For replacement, there is no need to replace the entire energy storage battery module 2 .

Moreover, when the battery capacity of the energy storage battery cell 1 decays below the preset value of the rated capacity, the protector 3 is directly disconnected, and the energy storage battery cell 1 can be directly replaced, so that the replaced storage battery can be replaced. The energy storage battery cells 1 are processed for resource utilization, so as to realize the cascade utilization of the energy storage battery cells 1 . Thereby, the failure rate of the energy storage battery module 2 is reduced, the stability and assembly flexibility of the energy storage battery module are improved, and the safety and overall power generation efficiency of the energy storage battery module can be finally improved.

Example 2

The present invention also provides a cascade utilization system, which includes: the energy storage battery module and the battery rack 7 as described in the above embodiments. The battery rack 7 is suitable for placing the energy storage battery module 2 in the above embodiment.

In this way, the technicians can place the energy storage battery cells 1 on the battery rack 7 assembled on site during construction on site, and the technicians can also perform the energy storage battery cells 1 according to the needs of different application scenarios and the actual situation. Flexible series-parallel connection to form energy storage battery modules 2 of different powers. In addition, it is also convenient for technicians to replace the energy storage battery cells 1 at any time in the later stage. In this way, the replaced energy storage battery cells 1 can be processed for resource utilization, and the cascade utilization of the energy storage battery cells 1 can be realized. It avoids that once the energy storage battery module 2 is damaged, it is not necessary to replace the whole with the battery insert box as a unit. Thus, the flexibility of the energy storage battery module 2 is improved.

Optionally, in some embodiments of the present invention, the battery rack 7 includes a plurality of support racks. The support frame is provided with a number of battery cavities connected to each other, the battery cavities are suitable for placing the energy storage battery modules 2, and each of the battery cavities has a position corresponding to the energy storage battery cell 1 A disassembly port is provided. Technicians can replace and install the energy storage battery cell 1 through the disassembly port.

The support frames are arranged in a rectangular shape, and the plurality of support frames provided on the battery frame 7 are stacked at a certain interval, so that the space enclosed by the adjacent support frames and the support plate is suitable for placing the energy storage battery module 2 .

The positive bus bar 4 and the negative electrode bus bar 5 are arranged on the battery rack 7 . In order to ensure the maximum distance between the positive bus bar 4 and the negative bus bar 5, the positive output end and the negative output end of each energy storage battery module 2 can only be drawn out from the opposite or adjacent sides of the battery rack 7, respectively. Then, it is connected to the positive bus bar 4 and the negative bus bar 5 in parallel, and the large current after the confluence is connected to the electrical load 6 through an independent cable. The positive bus bar 4 and the negative electrode bus bar 5 are bus hard bus bars.

In the present invention, by arranging the positive electrode busbar 4 and the negative electrode busbar 5 on the battery frame 7, the distance between the positive electrode and the negative electrode of the energy storage battery module 2 can be widened to the greatest extent, and the storage battery can be avoided. The fault of short circuit between the positive and negative poles of the battery module 2 is prone to occur.

Optionally, in some embodiments of the present invention, the battery rack 7 further includes: a top panel, several cabinet panels and several cabinet doors.

The top plate is arranged on the top of the battery holder 7 and is suitable for closing the top of the battery holder 7 . The cabinet board is arranged on one side of the battery rack 7 or is multi-measured, and the cabinet door is rotatably arranged on the battery rack 7 through a rotating shaft. The top plate, the cabinet plate and the cabinet door are surrounded to form an inner space. The cabinet door is suitable for completely closing the battery compartment.

By arranging the top plate, the cabinet plate and the cabinet door, the present invention can ensure that the energy storage battery module is not affected by dust and impurities in the surrounding environment when the energy storage battery module works normally on the battery rack 7, and can better ensure the energy storage battery module of normal work. At the same time, the setting of the cabinet door is also convenient for technicians to replace the energy storage battery cells 1 on the battery rack 7 .

In the present invention, the top plate, the cabinet plate and the cabinet door are also made of transparent materials, so that the technician can observe the working state of the energy storage battery module 2 on the battery rack 7 in real time, thereby improving the working efficiency of the technician.

As an optional embodiment, in the present invention, the cabinet board and the cabinet door are provided with a heat dissipation area suitable for heat dissipation of the pure pumpkin battery module. In this way, it can be ensured that the heat generated by the energy storage battery module 2 can be dissipated to the outside in time, thereby ensuring the normal operation of the energy storage battery module 2 .

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For ordinary workers in the field, changes or changes in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (10)

1. An energy storage battery module, comprising:

the energy storage battery comprises a plurality of energy storage battery modules (2), wherein each energy storage battery module (2) is formed by connecting a plurality of energy storage battery monomers (1) in series and parallel;

the positive electrode bus bar (4) is connected with the positive electrode output ends of the energy storage battery modules (2);

and the negative electrode bus bar (5) is connected with the negative electrode output ends of the energy storage battery modules (2).

2. The energy storage battery module as recited in claim 1, wherein the positive output end and the negative output end are oppositely disposed on two sides of the energy storage battery module (2).

3. The energy storage battery module of claim 1, further comprising:

and the protector (3) is arranged between the positive output end and the positive bus bar (4) and/or between the negative output end and the negative bus bar (5).

4. Energy storage battery module according to claim 3, characterized in that the protector (3) is a circuit breaker and/or a fuse.

5. A echelon utilization system, comprising:

an energy storage battery module as claimed in any one of claims 1 to 4;

a battery holder (7), the battery holder (7) being adapted to place the energy storage battery module (2).

6. The echelon utilization system of claim 5, characterized in that the battery rack (7) comprises:

the energy storage battery module comprises a plurality of support frames, wherein the support frames are provided with a plurality of battery cavities which are connected with one another, the energy storage battery modules (2) are suitable for being placed in the battery cavities, and a dismounting opening is formed in the position, corresponding to the energy storage battery monomer (1), in each battery cavity.

7. The echelon utilization system of claim 5, characterized in that the positive bus bar (4) and the negative bus bar (5) are provided on the battery rack (7).

8. The echelon utilization system of any one of claims 5-7, characterized in that the battery rack (7) further comprises:

the top plate is arranged at the top of the battery rack (7) and is suitable for sealing the top of the battery rack (7);

the cabinet plates are arranged on one side or multiple sides of the battery rack (7);

and the cabinet doors are rotatably arranged on the battery rack (7) and are suitable for sealing the battery cavity.

9. The echelon utilization system of claim 8, wherein the top plate, the cabinet plate, and the cabinet door are transparent.

10. The echelon utilization system of claim 8, wherein the cabinet plate and the cabinet door are provided with heat dissipation areas adapted to dissipate heat from the energy storage battery modules.

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