A dual-bmu energy storage module

Abstract

This invention discloses a dual-BMU energy storage module, comprising a battery unit, a support unit, an end frame, and a control module. The battery unit includes two battery modules arranged along the Y-axis and electrically connected to each other. The support unit has a connecting portion. The end frame is fixed to the connecting portion and has a second opening along the Y-axis. The control module includes two BMU units respectively adapted to connect to the battery modules and a mounting wall perpendicular to the Y-axis. The two BMU units are respectively locked to the front and rear sides of the mounting wall along the Y-axis. The mounting wall is adapted to be locked to the end frame so that the rearmost BMU unit extends into the second opening. The frontmost BMU unit is adapted to connect to the corresponding battery module via a connecting line penetrating the end frame. The energy storage module of this application includes two BMU units, and the control module is easy to maintain.

Description

Technical Field

[0001] This invention relates to the field of energy storage technology, and more specifically to an energy storage module with dual BMUs. Background Technology

[0002] Energy storage systems typically consist of multiple energy storage modules, often housed within a shipping container. Each module generally includes a battery module and a Battery Management Unit (BMU) connected to it via signal, electrical, or signal-electrical connections. The BMU controls the battery module, but a single BMU can only control a battery module with a certain energy density. As the energy density of the battery module increases (e.g., the number of battery modules increases), a single BMU cannot meet the module's needs, necessitating an increase in the number of BMUs. For ease of maintenance, the BMUs are usually placed at the front of the energy storage module, allowing for maintenance without removing the module from the container. However, the front of the energy storage module has limited space, as it houses many other components besides the BMUs, leaving little room for multiple BMUs. This also limits the development of energy storage modules towards higher energy density. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned defects or problems in the prior art and to provide a dual-BMU energy storage module that is easy to maintain.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] Technical Solution 1 and its related embodiments provide a dual-BMU energy storage module, including a battery unit comprising two battery modules arranged along the Y-axis and electrically connected to each other; a support unit supporting the battery unit along the Z-axis, with its front end along the Y-axis forming a connection with the front end of the battery unit along the Y-axis; an end frame fixed to the connection, having a second opening along the Y-axis; and a control module comprising two BMU units respectively adapted to connect to the battery modules and a mounting wall perpendicular to the Y-axis. The two BMU units are respectively locked to the front and rear sides of the mounting wall along the Y-axis, and the mounting wall is adapted to be locked to the end frame so that the rearmost BMU unit extends into the second opening, wherein the frontmost BMU unit is adapted to be connected to the corresponding battery module through a connecting line penetrating the end frame.

[0006] Based on technical solution one, there is also technical solution two. In technical solution two and its related embodiments, when the mounting wall is locked on the end frame, the second opening of the closed part is formed with the end frame to form a wiring port. The BMU unit located on the front side is adapted to be connected to the corresponding battery module through the connecting line passing through the wiring port.

[0007] Based on technical solution two, there is also technical solution three. In technical solution three and its related embodiments, the wiring port is arranged adjacent to the mounting wall along the Z-axis direction; the wiring port of the BMU unit faces the wiring port.

[0008] Based on technical solution three, technical solution four is also provided. In technical solution four and its related embodiments, a cover and a cover plate are further provided. The cover is adapted to be detachably fixed to the supporting unit to form a receiving cavity. The receiving cavity has a front wall extending along the Z-axis direction. The front wall has a window opening along the Y-axis direction. The cover plate seals and covers the window. The end frame has a connecting wall extending along the Z-axis direction. The second opening is formed on the connecting wall and is opposite to the window. The mounting wall is adapted to be locked on the connecting wall and located in front of the connecting wall.

[0009] Based on technical solution four, there is also technical solution five. In technical solution five and its related embodiments, the connecting wall and the front wall are attached to each other and fixedly connected, and the BMU unit located on the front side is adapted to extend out of the window.

[0010] Based on technical solution five, there is also technical solution six. In technical solution six and its related embodiments, the cover plate is locked to the front wall and the connecting wall; the cover plate is provided with a second reinforcing groove with an opening facing rearward and opposite to the second opening, and a second grid structure is formed in the second reinforcing groove. The BMU unit located on the front side is adapted to abut against the second grid structure when the cover plate is sealed and covered on the window.

[0011] Based on technical solution six, technical solution seven is also provided. In technical solution seven and its related embodiments, the mounting wall is provided with a third reinforcing part at both ends along the X-axis direction. The third reinforcing part is provided with at least two layers of walls that fit together with each other. The third reinforcing part is adapted to be locked with the connecting wall.

[0012] Based on technical solution seven, technical solution eight is also provided. In technical solution eight and its related embodiments, the connecting wall protrudes backward and has a second groove with an opening facing forward. The bottom wall of the second groove has a second opening, and the mounting wall is locked to the periphery of the bottom wall of the second groove.

[0013] Based on any one of technical solutions four to eight, a technical solution nine is also provided. In technical solution nine and its related embodiments, the end frame is provided with a support wall integrally connected to the connecting wall. The support wall is adapted to be locked with the connecting wall and located behind the connecting wall. The end frame is also provided with a plurality of second reinforcing parts spaced apart along the X-axis at the connection between the connecting wall and the support wall. The second reinforcing parts are recessed rearward relative to the connecting wall and protrude in a direction away from the support wall relative to the support wall.

[0014] Based on technical solution nine, technical solution ten is also provided. In technical solution ten and its related embodiments, the length of the connecting wall along the X-axis is greater than the length of the supporting wall along the X-axis, and both ends of the connecting wall protrude relative to the supporting wall; the end frame is also provided with two first reinforcing walls and one second reinforcing wall; the two first reinforcing walls are perpendicular to the X-axis direction, and are respectively located on both sides of the connecting wall along the X-axis direction and are integrated with the connecting wall; the second reinforcing wall is perpendicular to the Z-axis direction, and is located at the end of the connecting wall away from the supporting wall and is integrated with the connecting wall.

[0015] As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In technical solution one, the connection between the control module and the battery unit means that the control module and the battery unit are connected by signal, electrical, or signal-electrical connections. Since two battery modules are set up, the energy density of the energy storage module is relatively large, and one BMU unit cannot meet the requirements. Therefore, two corresponding BMU units need to be set up. In order to facilitate the maintenance of the control module, the control module still needs to be placed at the front end of the energy storage module. However, the space at the front end of the energy storage module is limited, and the installation of the control module is somewhat difficult. In this technical solution, the two BMU units are locked to the end frame by the mounting wall. Therefore, in actual installation, the two BMU units can be locked to the front and rear sides of the mounting wall along the Y-axis to form the control module. Then, the control module is extended from front to back into the second opening and locked to the end frame. When the control module needs to be maintained, the mounting wall is removed, and the control module can be taken out from the second opening. The rear BMU unit extends into the second opening, and the front BMU unit is suitable for connecting to the corresponding battery module through the connecting line through the end frame. This not only facilitates maintenance but also simplifies the wiring and makes it easy to connect wires. Therefore, the technical solution of this application enables the energy storage module to develop towards high energy density, and the control module is easy to maintain.

[0017] 2. In technical solution two, when the mounting wall is fixed to the end frame, the second opening is closed and a wiring port is formed between the wall and the end frame. The BMU unit located on the front side is suitable for connecting to the corresponding battery module through the connecting wire passing through the wiring port. Compared with opening a wiring port on the end frame, the processing is more convenient and the installation of the control module is easier.

[0018] 3. In technical solution three, the wiring port is arranged adjacent to the mounting wall along the Z-axis; the wiring port of the BMU unit faces the wiring port, which shortens the wiring distance between the front BMU unit and the battery unit, making wiring and routing easier and neater.

[0019] 4. In technical solution four, the design of the cover and cover plate improves the protection of the entire energy storage module. During installation, first lock the end frame to the connecting part, connect the control module to the battery unit, then lock the cover to the base, and finally install the cover plate. In this way, when the control module needs maintenance, the control module can be removed by removing the cover plate and then removing the mounting wall.

[0020] 5. In technical solution five, the connecting wall and the front wall are attached and fixed to each other, and the BMU unit located on the front side is suitable for extending out of the window, which makes the space of the energy storage module along the Y-axis more compact and avoids the end frame shaking, thus improving the stability of the end frame and the control module on the end frame.

[0021] 6. In technical solution six, the cover plate is locked to the front wall and the connecting wall. The cover plate is provided with a first reinforcing groove with an opening facing backward and opposite to the second opening. A first grid structure is formed in the first reinforcing groove. The BMU unit located on the front side is adapted to abut against the first grid structure when the cover plate is sealed and placed on the window. This not only improves the stability of the cover plate, the front wall and the connecting wall, but also avoids the instability of the control module.

[0022] 7. In technical solution seven, the setting of the third reinforcing part increases the strength of the mounting wall, thereby ensuring the stability of the control module and the stability of the connection between the control module and the end frame.

[0023] 8. In technical solution eight, the setting of the second groove increases the strength of the connecting wall, thereby improving the stability of the end frame and control module.

[0024] 9. In technical solution nine, the setting of the second reinforcing part increases the strength of the end frame, which is conducive to maintaining the stability of the control module. This advantage is particularly prominent during the handling of the energy storage module or when it is vibrated.

[0025] 10. In technical solution ten, the addition of the first and second reinforcing walls further increases the strength of the end frame. This advantage is particularly prominent during the handling of the energy storage module or during vibration. The length of the connecting wall along the X-axis is greater than the length of the supporting wall along the X-axis, and the two ends of the connecting wall protrude relative to the supporting wall, avoiding excessive occupation of the connecting area by the end frame and facilitating the layout of the front end of the energy storage module. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments are briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of an energy storage module according to an embodiment of the present invention;

[0028] Figure 2 This is an exploded perspective view of the energy storage module according to an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the support unit and part of the end frame according to an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the energy storage module's concealed enclosure according to an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the connecting unit and the cover plate according to an embodiment of the present invention;

[0032] Figure 6 for Figure 5 The front view;

[0033] Figure 7 for Figure 6 Sectional view along the AA direction;

[0034] Figure 8 for Figure 6 3D decomposition Figure 1 ;

[0035] Figure 9 for Figure 6 3D decomposition Figure 2 .

[0036] Explanation of key figure labels:

[0037] Battery unit 10; Battery module 11; Battery pack 12; Terminal block 13; Support unit 20; Base support 21; Connecting part 211; Liquid cooling plate 22; Inlet connector 221; Outlet connector 222; End bracket 30; Connecting wall 31; First groove 311; Second groove 312; First opening 313; Second opening 314; Support wall 32; Abutment wall 33; Insulating part 34; First groove 341; Second groove 342; Mounting hole 343; First reinforcing part 344; First reinforcing wall 35; Second reinforcing wall 36; Third reinforcing wall 37; Second reinforcement section 38; Control module 40; BMU unit 41; Mounting wall 42; Third reinforcement section 421; Wiring port 01; Connection module 50; Connection terminal 51; Electrical connector 52; First terminal 521; Second terminal 522; Fuse module 60; First end 61; Second end 62; Cover 70; Front wall 71; Window 72; Through hole 73; Cover plate 80; First reinforcing groove 81; Second reinforcing groove 82; Fire unit 91; Fire detector 92; Exhaust valve 93; Fire connector 94; Maintenance switch 95; Communication interface 96. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are preferred embodiments of the present invention and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0039] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and accompanying drawings of this invention is for distinguishing different objects and not for describing a specific order.

[0040] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this invention, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of this invention.

[0041] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this invention should be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection by other means or components.

[0042] In the claims, description and accompanying drawings of this invention, the terms "comprising," "having," and variations thereof are used to mean "including but not limited to."

[0043] In the claims and the description other than the embodiments, the terms "X-axis direction," "Y-axis direction," and "Z-axis direction" only refer to a feature having one of the aforementioned directions being perpendicular to a feature having another direction, and do not require that they be implemented according to the "X-axis direction," "Y-axis direction," and "Z-axis direction" described in the embodiments. In the embodiments, the X-axis direction is perpendicular to both the Y-axis direction and the Z-axis direction. The X-axis direction can be divided into left and right, the Y-axis direction into front and back, and the Z-axis direction into up and down.

[0044] See Figure 1-9 , Figure 1-9A dual-BMU energy storage module is shown, including a battery unit 10, a support unit 20, an end frame 30, a control module 40, a connection module 50, a safety module 60, a cover 70, a cover plate 80, and a fire protection unit 91.

[0045] See Figure 2 In this embodiment, the battery unit 10 includes two battery modules 11 arranged along the Y-axis and electrically connected to each other. Each battery module 11 consists of two battery packs 12 arranged along the X-axis. Each battery pack 12 has a rectangular parallelepiped structure, with its length along the Y-axis, width along the X-axis, and height along the Z-axis. Each battery pack 12 has a positive terminal 13 and a negative terminal 13 at both ends along the Y-axis, and these terminals are located on opposite diagonals of the top surface of each battery pack 12. Figure 2 The battery unit 10 contains four battery packs 12. The positive and negative terminals 13 of the two battery packs 12 on the left are aligned, as are the positive and negative terminals 13 of the two battery packs 12 on the right. Therefore, the battery pack 12 at the front left is connected in series with the battery pack 12 at the rear left, the battery pack 12 at the rear left is connected in series with the battery pack 12 at the rear right, and the battery pack 12 at the rear right is connected in series with the battery pack at the front right. Thus, the positive and negative terminals 13 of the battery pack 12 at the front left and the battery pack 12 at the front right form the external positive and negative terminals 13 of the entire battery unit 10. Specifically, the battery unit 10 has two terminals 13 at its front end along the Y-axis. However, it should be understood that in other embodiments, the battery unit 10 may have multiple external positive and negative terminals 13.

[0046] Support unit 20 supports battery unit 10 along the Z-axis direction, see [reference] Figure 3 A connection portion 211 is formed between the front end of the support unit 20 along the Y-axis and the front end of the battery unit 10 along the Y-axis. The support unit 20 includes a base 21 and a liquid cooling plate 22. The front end of the liquid cooling plate 22 is provided with an inlet connector 221 and an outlet connector 222 that extend along the Y-axis and penetrate the base 21 along the X-axis. The connection portion 211 is formed on the base 21. Figure 3 In this configuration, the connecting part 211 has already avoided the liquid inlet connector 221 and the liquid outlet connector 222, but it should be understood that the connecting part 211, the liquid inlet connector 221 and the liquid outlet connector 222 are not limited to the above configuration.

[0047] Figure 3 In the middle, the end frame 30 is locked to the connecting part 211, see also Figure 5 and Figure 9The end frame 30 is provided with a connecting wall 31, a supporting wall 32, an abutting wall 33, an insulating part 34, two first reinforcing walls 35, a second reinforcing wall 36, and two third reinforcing walls 37. The connecting wall 31 and the abutting wall 33 both extend along the Z-axis and are spaced apart from each other along the Y-axis. The supporting wall 32 is perpendicular to the Z-axis and is adapted to avoid the liquid inlet connector 221 and the liquid outlet connector 222 from locking with the connecting part 211, and is integrally connected to the connecting wall 31 and the abutting wall 33. The connecting wall 31 is located in front of the abutting wall 33, and the connecting wall 31 has a first opening 313 and a second opening 314 along the Y-axis direction. Figure 3 In the diagram, both the first opening 313 and the second opening 314 are rectangular, with the area of ​​the second opening 314 being larger than the area of ​​the first opening 313. For specific implementation details, please refer to [link / reference needed]. Figure 8-9 The connecting wall 31 has a first groove 311 protruding forward and a second groove 312 protruding backward. The bottom wall of the second groove 312 has the second opening 314. The first groove 311 and the second groove 312 are arranged along the X-axis direction. The first opening 313 is located between the first groove 311 and the second groove 312 along the X-axis direction.

[0048] Figure 3 In the middle, the length of the connecting wall 31 along the X-axis is greater than the length of the supporting wall 32 along the X-axis and extends out relative to the two sides of the supporting wall 32 along the X-axis. The liquid inlet connector 221 and the liquid outlet connector 222 are located on both sides of the supporting wall 32 along the X-axis and directly below the connecting wall 31. That is, the projection of the liquid inlet connector 221 and the liquid outlet connector 222 along the Z-axis overlaps with the projection of the connecting wall 31 along the Z-axis.

[0049] The insulating part 34 extends along the Z-axis and is locked onto the abutment wall 33, see [reference]. Figure 5 , Figure 7 and Figure 9 The insulating part 34 protrudes rearward and is provided with a first groove 341 and a second groove 342. The groove walls of the first groove 341 and the groove walls of the second groove 342 are both formed with internal threads. The insulating part 34 is provided with a mounting hole 343 that passes through along the Y-axis direction. The mounting hole 343 should be adapted to the size of the safety module 60. The insulating part 34 is also provided with a first reinforcing part 344 near the abutment wall 33. A grid structure is formed in the first reinforcing part 344.

[0050] Figure 9 In the middle, the two first reinforcing walls 35 are located on both sides of the connecting wall 31 along the X-axis and are integrated with the connecting wall 31; the second reinforcing wall 36 is perpendicular to the Z-axis and is located at the end of the connecting wall 31 away from the supporting wall 32 and is integrated with the connecting wall 31; the two third reinforcing walls 37 are perpendicular to the X-axis and are located on both sides of the abutting wall 33 along the X-axis and are integrated with the abutting wall 33 and the supporting wall 32.

[0051] The end frame 30 is also provided with a number of second reinforcing parts 38 arranged at intervals along the X-axis at the connection between the connecting wall 31 and the supporting wall 32. The second reinforcing parts 38 are recessed backward and protrude relative to the supporting wall 32 in a direction away from the supporting wall 32.

[0052] In this embodiment, the control module 40, the connection module 50, and the insurance module 60 are all fixedly connected to the end frame 30 to form a connection unit.

[0053] Specifically, see Figure 5 The control module 40 includes two BMU units 41, each adapted to connect to a battery module 11, and a mounting wall 42 perpendicular to the Y-axis. The two BMU units 41 are respectively locked to the front and rear sides of the mounting wall 42 along the Y-axis. The mounting wall 42 is adapted to be locked onto the connecting wall 31 of the end frame 30 so that the rearmost BMU unit 41 extends into the second opening 314. The frontmost BMU unit 41 is adapted to connect to the corresponding battery module 11 via a connecting wire passing through the end frame 30. When the mounting wall 42 is locked onto the end frame 30, it partially closes the second opening 314 and forms a wiring port 01 between itself and the end frame 30. The frontmost BMU unit 41 is adapted to connect to the corresponding battery module 11 via a connecting wire passing through the wiring port 01. The wiring port 01 is arranged adjacent to the mounting wall 42 along the Z-axis, with the connection terminals of the BMU units 41 facing the wiring port 01. Figure 5 In the middle, the wiring port 01 is located above the BMU unit 41, and the connection terminal of the BMU unit 41 is located at the top.

[0054] See Figure 8 The mounting wall 42 has third reinforcing portions 421 at both ends along the X-axis. Each third reinforcing portion 421 has at least two layers of walls that fit together. The third reinforcing portion 421 is adapted to be locked with the connecting wall 31. In this embodiment, the mounting wall 42 is locked to the periphery of the bottom wall of the second groove 312.

[0055] See Figure 5 , Figure 8-9The connection module 50 is provided with two connection terminals 51 and an electrical connector 52. The two connection terminals 51 are used for connection to external circuits, but it should be understood that the number of connection terminals 51 is not limited to two. The electrical connector 52 connects the two connection terminals 51 and is configured to be fixedly connected to the two terminal blocks 13 when the end bracket 30 is locked to the connection part 211. Both connection terminals 51 are embedded in the connection wall 31. In this embodiment, both connection terminals 51 are embedded in the bottom wall of the first groove 311. The electrical connector 52 is provided with a first terminal block 52. In this embodiment, the electrical connector 52 consists of a positive terminal block and a negative terminal block, and two connection terminals 51 are respectively a positive connection terminal 51 and a negative connection terminal 51. The positive terminal block is provided with the aforementioned first terminal block 521 and second terminal block 522. One end of the positive terminal block is locked to the positive connection terminal 51, and the other end forms a free end suitable for locking with the terminal block 13 of the battery unit 10. One end of the negative terminal block is locked to the negative connection terminal 51, and the other end forms a free end suitable for locking with the terminal block 13 of the battery unit 10. Figure 5 , Figure 8-9 In this configuration, the free ends of both the positive and negative terminals are perpendicular to the Z-axis, thus making them suitable for locking with the two terminals 13 of the battery cell 10 and achieving electrical connection.

[0056] The safety module 60 is adapted to be locked along the Y-axis to the end frame 30, the first terminal 521, and the second terminal 522, and is adapted to be disassembled from the front end of the end frame 30; the safety module 60 and the control module 40 are arranged along the X-axis. See also Figure 5 and Figure 7 The safety module 60 is locked onto the insulating part 34 and is opposite to the first opening 313. The safety module 60 is provided with a first end 61 and a second end 62 along the Z-axis direction, which are suitable for locking onto the insulating part 34. The first end 61 and the second end 62 are arranged along the Z-axis direction and are located in front of the first terminal 521, the second terminal 522 and the insulating part 34.

[0057] See Figure 2 and Figure 4 The fire protection unit 91 is placed in the gap between the two battery modules 11 and connected to the control module 40. Here, the fire protection unit 91 is mainly connected to the control module 40 via signal.

[0058] In practical applications, please refer to Figure 2 and Figure 4 It also includes a fire detector 92, an exhaust valve 93, a fire hose connection 94, a maintenance switch 95, and a communication interface 96. The fire detector 92 is located between the control module 40 and the front end of the battery unit 10 and is locked to the connection part 211. In actual applications, the positive terminal block is also located between the fire detector 92 and the front end of the battery unit 10.

[0059] The exhaust valve 93 and the fire extinguishing connector 94 are both embedded in the cover plate 80 and opposite to the first opening 313. The maintenance switch 95 and the communication interface 96 are both embedded in the connecting wall 31. In this embodiment, the maintenance switch 95 and the communication interface 96 are both embedded in the bottom wall of the first groove 311. In this embodiment, the maintenance switch 95 is connected in series with the electrical connector 52 and is located between the connecting terminal 51 and the fuse module 60, so the entire energy storage module can be shut off by the maintenance switch 95.

[0060] See Figure 2 The cover 70 is adapted to be detachably fixed to the support unit 20 to form a receiving cavity. The receiving cavity has a front wall 71 extending along the Z-axis direction. The front wall 71 has a window 72 and a through hole 73 opening along the Y-axis direction. The cover plate 80 is sealed and covered on the window 72. The second groove 312 and the first opening 313 are opposite to the window 72, so the safety module 60 is opposite to the window 72, and the control module 40 is opposite to the window 72. The first groove 311 is opposite to the through hole 73. Therefore, the two connecting terminals 51, the maintenance switch 95 and the communication interface 96 are all adapted to extend out of the through hole 73. In this embodiment, the front wall 71 is formed on the cover 70, and the cover 70 is locked to the base 21. The cover plate 80 is locked to the front wall 71 of the cover 70, and the connecting wall 31 is adapted to fit against the inner surface of the front wall 71. Therefore, the cover plate 80, the front wall 71 and the connecting wall 31 are locked to each other.

[0061] See Figure 5 The cover plate 80 has a second reinforcing groove 82 with a rearward opening opposite to the second opening 314. A second grid structure is formed within the second reinforcing groove 82. The BMU unit 41 located on the front side is adapted to abut against the second grid structure when the cover plate 80 is sealed and installed over the window 72. See also Figure 7 The rear side of the cover plate 80 is provided with a first reinforcing groove 81 with an opening facing the side where the control module 40 is located. A first grid structure is formed in the first reinforcing groove 81. The safety module 60 is adapted to abut against the first grid structure when the cover plate 80 is placed over the window 72.

[0062] The energy storage module installation process in this embodiment is as follows:

[0063] First, the connection unit is pre-assembled. The maintenance switch 95, two connection terminals 51 and communication interface 96 are embedded in the bottom wall of the first groove 311. The electrical connector 52 is connected to the two connection terminals 51 and the maintenance switch 95. The first end 61 and the second end 62 of the fuse module 60 are respectively locked in the first groove 341 and the second groove 342 of the insulating part 34 and connected to the first terminal 521 and the second terminal 522 of the electrical connector 52. At this time, the fuse module 60 is located in front of the first terminal 521, the second terminal 522 and the insulating part 34. The control module 40 is locked in the periphery of the bottom wall of the second groove 312 through the mounting wall 42. The rear BMU unit 41 extends into the second opening 314, and the front BMU unit 41 and the mounting wall 42 are located in front of the connection wall 31.

[0064] First, fix the battery unit 10 to the support unit 20, fix the fire protection unit 91 to the gap between the two battery modules 11, and lock the support wall 32 of the pre-assembled connecting unit between the liquid inlet connector 221 and the liquid outlet connector 222 to the connecting part 211. The liquid inlet connector 221 and the liquid outlet connector 222 are located on both sides of the support wall 32 along the X-axis direction and below the connecting wall 31. Fix the electrical connector 52 to the wiring terminal 13 of the battery unit 10 to achieve electrical connection. Connect the control module 40 to the battery unit 10 and the fire protection unit 91. The connection here is mainly a signal connection. The connection line of the BMU unit 41 located on the front side passes through the wiring port 01 and connects to the battery unit 10.

[0065] Next, lock the cover 70 to the base 21. The maintenance switch 95, the two connection terminals 51 and the communication interface 96 will then protrude from the through hole 73. For parts that may interfere with the cover 70, they can be installed after the cover 70 is installed. Finally, install the cover plate 80. The cover plate 80 is locked to the front wall 71 and the connecting wall 31 of the cover 70 at the same time. The installation is then complete. The front end of the control module 40 abuts against the second grid structure of the cover plate 80, and the safety module 60 abuts against the first grid structure of the cover plate 80.

[0066] When maintenance of the fuse module 60 is required, first remove the cover plate 80, then remove the first end 61 and the second end 62 of the fuse module 60 to remove the fuse module 60 from the first opening 313 and the window 72. After maintenance of the fuse module 60 is completed or a new fuse module 60 is replaced, the fuse module 60 is placed back into the cover 70 from the window 72 and the first opening 313 and locked with the insulating part 34, and then connected to the first terminal 521 and the second terminal 522.

[0067] When the control module 40 is damaged, first remove the cover plate 80, then disconnect the connection wire of the BMU unit 41, and the control module 40 can be removed by removing the mounting wall 42.

[0068] As can be seen, the technical solution of this embodiment reduces the difficulty of on-site installation and is easy to maintain by pre-forming multiple modular units.

[0069] In this embodiment, since the control module 40, connection module 50, and safety module 60 are all fixedly connected to the end frame 30, the connection unit can be assembled first during actual installation. The end frame 30 of the connection unit is then fixedly connected to the connection part 211. The end frame 30 avoids the liquid inlet connector 221 and liquid outlet connector 222 and is locked to the connection part 211. This also ensures that the control module 40, connection module 50, and safety module 60 on the end frame 30 all avoid the liquid inlet connector 221 and liquid outlet connector 222. Thus, both the connection unit and the liquid inlet connector 221 and liquid outlet connector 222 do not interfere with each other, and the connection part 211 is also protected. The corresponding space is fully utilized, and more importantly, the number of components connected to the support unit 20 is reduced. The connection unit, as a whole, can be pre-installed. Therefore, during on-site installation, it is only necessary to lock the end frame 30 to the connection part 211, fix the electrical connector 52 to the terminal block 13 of the battery unit 10 to achieve electrical connection, and connect the control module 40 to the battery unit 10. Compared with the on-site installation of the fuse module 60 on the support unit 20 and then connecting it to the connection module 50, then installing the connection module 50, and then installing the control module 40, the installation steps are reduced and the difficulty of on-site installation is reduced.

[0070] Both the inlet connector 221 and the outlet connector 222 extend along the Y-axis and penetrate the front end of the base 21. The end frame 30 is staggered from the inlet connector 221 and the outlet connector 222 along the X-axis, thus minimizing the area occupied by the inlet connector 221 and the outlet connector 222 in the connection part 211. This helps to increase the area occupied by the end frame 30 in the connection part 211 and improves the connection stability between the end frame 30 and the connection part 211. The housing 70 and the cover plate 80 improve the protection of the entire energy storage module.

[0071] The end frame 30 is designed to ensure structural stability. Specifically, the first groove 311 and the second groove 312 create undulations along the Y-axis on the connecting wall 31, increasing its strength and improving the stability of the connecting unit. Furthermore, the second groove 312 allows for pre-positioning of the control module 40 during installation, making installation more convenient. The support wall 32 is designed for easy locking with the connecting part 211. The support wall 32, connecting wall 31, and abutment wall 33 are integrated, ensuring the strength of the end frame 30. The first reinforcing part 344 of the insulating part 34 increases its strength, ensuring the stability of the safety module 60 after installation. The first reinforcing wall 35, the second reinforcing wall 36, the third reinforcing wall 37, and the second reinforcing part 38 further increase the strength of the end frame 30, contributing to the stability of the connecting unit. This advantage is particularly pronounced during the handling of the energy storage module or under vibration, especially when both the control module 40 and the connecting module 50 are fixed to the connecting wall 31.

[0072] The length of the connecting wall 31 along the X-axis is greater than the length of the supporting wall 32 along the X-axis, and the two ends of the connecting wall 31 protrude relative to the supporting wall 32. The liquid inlet connector 221 and the liquid outlet connector 222 are located on both sides of the supporting wall 32 along the X-axis, and their projections along the Z-axis overlap with the connecting wall 31. This helps to reduce the width of the supporting unit 20 in the X-axis direction, thereby making the entire energy storage module more compact.

[0073] When maintenance is required on the fuse module 60, it can be removed from the front without interfering with the control module 40. Maintenance of the fuse module 60 is convenient and avoids damage to the connection wires between the control module 40 and the battery unit 10. Since the fuse module 60 typically has a certain thickness and requires frequent maintenance, and the electrical connection between the fuse module 60 and the electrical connector 52 must be maintained, improper installation of the fuse module 60 can lead to inconvenience in wiring and maintenance. The design in this embodiment ensures both insulated contact between the fuse module 60 and the battery unit 10, and electrical connection between the fuse module 60 and the electrical connector 52, while also providing sufficient space between the insulating part 34 and the connecting wall 31 for the fuse module 60 to install, making installation and removal convenient.

[0074] The first end 61 and the second end 62 of the safety module 60 are arranged along the Z-axis direction, which is perpendicular to the X-axis direction. After the first end 61 and the second end 62 of the safety module 60 are locked to the insulating part 34, the insulating part 34 is not easily damaged. This also allows the first opening 313 to have sufficient area in the Z-axis direction for the installation and removal of the safety module 60. Since the Z-axis direction is also the height direction of the energy storage module, this arrangement is more conducive to reducing the width of the energy storage module, thereby making the structure of the energy storage module more compact. The arrangement of the first slot 341 and the second slot 342 eliminates the need to set a nut behind the insulating part 34, avoiding the inconvenience of installation and maintenance caused by the nut falling off. Especially when the energy storage module is equipped with a cover 70, it means that the safety module 60 can be maintained without removing the cover 70. This advantage is particularly prominent when the energy storage module is located inside a container, because it means that the entire energy storage module does not need to be removed from the container, greatly improving maintenance efficiency. The mounting hole 343 allows the insulation part 34 to be compatible with fuse modules of different thicknesses (Y-axis direction), making it widely applicable.

[0075] Since two battery modules 11 are set up, two corresponding BMU units 41 are also required. To facilitate maintenance of the control module 40, the control module 40 still needs to be placed at the front end of the energy storage module. However, the space at the front end of the energy storage module is limited, making the installation of the control module 40 somewhat difficult. In this embodiment, the two BMU units 41 are locked to the end frame 30 via mounting walls 42, thus facilitating the maintenance of the control module 40. The rearmost BMU unit 41 extends into the second opening 314, while the frontmost BMU unit 41 is suitable for connection to the corresponding battery module 11 via a connecting wire passing through the end frame 30. This not only facilitates maintenance but also simplifies wiring and makes connection easier. Therefore, this application enables the development of energy storage modules towards higher energy density.

[0076] When the mounting wall 42 is locked onto the end frame 30, it closes the second opening 314 and forms a wiring port 01 between the end frame 30 and the end frame 30. The BMU unit 41 located on the front side is adapted to connect to the corresponding battery module 11 through the connecting wire passing through the wiring port 01. Compared with opening a separate wiring port 01 on the end frame 30, the processing is more convenient and the installation of the control module 40 is easier. The wiring port 01 and the mounting wall 42 are arranged adjacent to each other along the Z-axis direction. The wiring port of the BMU unit 41 faces the wiring port 01, which shortens the wiring distance between the front BMU unit 41 and the battery unit 10, making wiring and routing easier and neater. The connecting wall 31 and the front wall 71 are attached to each other and fixedly connected. The BMU unit 41 located on the front side is adapted to extend out of the window 72, making the space of the energy storage module along the Y-axis direction more compact and avoiding the shaking of the end frame 30, thus improving the stability of the end frame 30 and the control module 40 on the end frame 30. The provision of the third reinforcing part 421 of the mounting wall 42 increases the strength of the mounting wall 42, thereby ensuring the stability of the control module 40 and the stability of the connection between the control module 40 and the end frame 30.

[0077] The cover plate 80 is locked to the front wall 71 and the connecting wall 31, which improves the stability of the cover plate 80, the front wall 71 and the connecting wall 31. The first reinforcing groove 81 and the second reinforcing groove 82 further enhance the strength of the cover plate 80 and prevent instability of the control module 40 and the safety module 60.

[0078] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this invention, but does not constitute a limitation on the scope of protection of this invention. Modifications, equivalent substitutions, or other improvements to the embodiments of this invention or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this invention or the foregoing embodiments, in conjunction with common knowledge, general technical knowledge, and / or existing technology, should all be included within the scope of protection of this invention.

Claims

1. A dual-BMU energy storage module, characterized in that, include The battery cell (10) includes two battery modules (11) arranged along the Y-axis and electrically connected to each other; The supporting unit (20) supports the battery unit (10) along the Z-axis direction, and its front end along the Y-axis direction forms a connection (211) with the front end of the battery unit (10) along the Y-axis direction. An end frame (30) is fixed to a connecting part (211) and has a second opening (314) in the Y-axis direction; The control module (40) includes two BMU units (41) adapted to be connected to the battery module (11) and a mounting wall (42) perpendicular to the Y-axis direction. The two BMU units (41) are respectively locked to the front and rear sides of the mounting wall (42) along the Y-axis direction. The mounting wall (42) is adapted to be locked to the end frame (30) so that the rear BMU unit (41) extends into the second opening (314). The front BMU unit (41) is adapted to be connected to the corresponding battery module through a connecting line passing through the end frame (30).

2. The energy storage module with dual BMUs as described in claim 1, characterized in that, When the mounting wall (42) is locked onto the end frame (30), it closes the second opening (314) and forms a wiring port (01) between itself and the end frame (30). The BMU unit (41) located on the front side is adapted to be connected to the corresponding battery module (11) through the connecting wire passing through the wiring port (01).

3. The energy storage module with dual BMUs as described in claim 2, characterized in that, The wiring port (01) is arranged adjacent to the mounting wall (42) along the Z-axis direction; the wiring port of the BMU unit (41) faces the wiring port (01).

4. The energy storage module with dual BMUs as described in claim 3, characterized in that, It also includes a cover (70) and a cover plate (80), the cover (70) being adapted to be detachably fixed to the support unit (20) and form a receiving cavity, the receiving cavity having a front wall (71) extending along the Z-axis direction, the front wall (71) having a window (72) opening along the Y-axis direction, the cover plate (80) sealingly covering the window (72); the end frame (30) having a connecting wall (31) extending along the Z-axis direction, the second opening (314) being formed on the connecting wall (31) and opposite to the window (72), the mounting wall (42) being adapted to be locked onto the connecting wall (31) and located in front of the connecting wall (31).

5. The energy storage module with dual BMUs as described in claim 4, characterized in that, The connecting wall (31) is attached to and fixed to the front wall (71), and the BMU unit (41) located on the front side is adapted to extend out of the window (72).

6. The energy storage module with dual BMUs as described in claim 5, characterized in that, The cover plate (80) is locked to the front wall (71) and the connecting wall (31); the cover plate (80) is provided with a second reinforcing groove (82) with an opening facing rearward and opposite to the second opening (314), and a second grid structure is formed in the second reinforcing groove (82). The BMU unit (41) located on the front side is adapted to abut against the second grid structure when the cover plate (80) is sealed and covered on the window (72).

7. The energy storage module with dual BMUs as described in claim 6, characterized in that, The mounting wall (42) has a third reinforcing part (421) at both ends along the X-axis direction. The third reinforcing part (421) has at least two layers of walls that fit together. The third reinforcing part (421) is adapted to be locked with the connecting wall (31).

8. The energy storage module with dual BMUs as described in claim 7, characterized in that, The connecting wall (31) protrudes backward and has a second groove (312) with an opening facing forward. The bottom wall of the second groove (312) has a second opening (314). The mounting wall (42) is locked to the periphery of the bottom wall of the second groove (312).

9. A dual-BMU energy storage module as described in any one of claims 4-8, characterized in that, The end frame (30) is provided with a support wall (32) integrally connected with the connecting wall (31). The support wall (32) is adapted to be locked with the connecting wall (31) and located behind the connecting wall (31). The end frame (30) is also provided with a plurality of second reinforcing parts (38) spaced apart along the X-axis at the connection between the connecting wall (31) and the support wall (32). The second reinforcing parts (38) are recessed behind the connecting wall (31) and protrude away from the support wall (32) relative to the support wall (32).

10. The energy storage module with dual BMUs as described in claim 9, characterized in that, The length of the connecting wall (31) along the X-axis is greater than the length of the supporting wall (32) along the X-axis, and the two ends of the connecting wall (31) protrude relative to the supporting wall (32); the end frame (30) is also provided with two first reinforcing walls (35) and a second reinforcing wall (36); the two first reinforcing walls (35) are perpendicular to the X-axis and are located on both sides of the connecting wall (31) along the X-axis and are integrated with the connecting wall (31); the second reinforcing wall (36) is perpendicular to the Z-axis and is located at the end of the connecting wall (31) away from the supporting wall (32) and is integrated with the connecting wall (31).

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