energy storage cabinet

Abstract

This utility model discloses an energy storage cabinet, relating to the field of energy storage technology. It includes a housing and a battery pack located within the housing. The battery pack includes multiple battery cells, which are divided into several groups. The positive and negative terminals of the battery cells are located at the same end. A battery management module is electrically connected to a same-end, different-position wiring mechanism. Each group of battery cells is matched with two same-end, different-position wiring mechanisms. Each same-end, different-position wiring mechanism includes a main pressure plate, wiring blocks, and busbars. The main pressure plate extends along the length of each group of battery cells. The main pressure plate has wiring ports formed on it to expose the positive and negative terminals of the battery cells, located at the end of the battery cell with the positive and negative terminals. The number of busbars corresponds to the number of main pressure plates and extends along the length of the main pressure plate. The number of wiring blocks corresponds to the number of positive and negative terminals of the battery cells. The wiring blocks are connected to the main pressure plate and contact the positive and negative terminals of the battery cells. This application improves the ease of installation and maintenance of the battery pack in the energy storage cabinet.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to an energy storage cabinet. Background Technology

[0002] Energy storage battery cabinets are widely used in many industries, especially in the face of continuously growing energy demand, demonstrating great flexibility and adaptability. For example, many manufacturing companies use energy storage battery cabinets to balance power load, avoid peak-hour electricity price increases, and ensure the stability and continuity of production. In addition to industrial applications, they can also be installed in home environments to meet power demand during abnormal power outages or for energy storage in conjunction with household solar cells.

[0003] Energy storage cabinets typically include battery packs, BMU / BMS battery management systems, etc. Among them, the number of battery cells in the battery pack is relatively large and they need to be connected in series / parallel. If traditional wiring methods are used, the internal wiring is complicated, and if busbars are used, contact defects are likely to occur, resulting in relatively inconvenient installation and maintenance of energy storage cabinets and a relatively poor user experience. Therefore, this application proposes a new technical solution. Utility Model Content

[0004] To improve the ease of battery pack installation and maintenance in energy storage cabinets, this application provides an energy storage cabinet.

[0005] This application provides an energy storage cabinet, which adopts the following technical solution:

[0006] An energy storage cabinet includes a housing and a battery pack and a battery management module located in the housing. The battery pack includes multiple battery cells, which are divided into several groups. The positive and negative terminals of the battery cells are located at the same end. The distribution direction of the multiple battery cells in the same group is parallel to the width direction of the battery cells and perpendicular to the arrangement direction of the positive and negative terminals of the corresponding battery cells.

[0007] The battery management module is electrically connected to a same-end, different-position wiring mechanism. A group of battery cells is matched with two same-end, different-position wiring mechanisms. The same-end, different-position wiring mechanism includes a main pressure plate, a wiring block, and a bus.

[0008] The main pressure plate extends along the length of each group of battery cells, and the main pressure plate has a connection port for exposing the positive and negative terminals of the battery cells and is located at the end of the battery cells with positive and negative terminals.

[0009] The number of buses corresponds to the total pressure plate and extends along the length of the total pressure plate;

[0010] The number of the terminal blocks corresponds to the positive and negative terminals of the battery cell. The terminal blocks are connected to the main pressure plate and contact the positive and negative terminals of the battery cell.

[0011] Optionally, the bus is a composite cable and is connected to several thermal units, the thermal units contacting the wiring block.

[0012] Optionally, if the number of battery cells in the same group is odd, then the outermost terminal block on each total pressure plate is independent, and the other terminal blocks are connected in pairs, with each pair of terminal blocks contacting one or zero thermal cells.

[0013] Optionally, the wiring block has a socket, and a terminal head is inserted into the socket. The terminal head is connected to the thermal unit or the bus. The terminal head includes a terminal plate, and the end of the terminal plate away from the bus is bent to form an elbow with the opening of the elbow facing away from the battery cell.

[0014] Optionally, the main pressure plate is recessed to form a groove, and the wiring block is snapped into the groove;

[0015] One or two terminal blocks located at the outermost end of each of the aforementioned main pressure plates are called terminal blocks, and the terminal blocks extend out of the end face of the battery pack to form an external connection;

[0016] An insulating block is provided outside the battery pack. The insulating block is located on the side facing away from the inner wall of the adjacent housing. A spring is fixed on the insulating block. The spring extends toward the inner wall of the adjacent housing and abuts against the inner wall.

[0017] Optionally, two adjacent total pressure plates are fixed to each other and two separators are fixed in the middle on the side opposite to the battery cell. The separators are parallel to the total pressure plates, and the busbar is located on the side opposite to each other of the two separators.

[0018] Optionally, the housing includes an intermediate body and a front cover and a rear cover located at both ends of the intermediate body. The intermediate body has a hollow structure. The front cover and the rear cover are both connected to a reinforcing structure extending along the inner wall of the cover. The reinforcing structure includes a honeycomb structure plate. The honeycomb structure plate is fixed to the front cover and the rear cover. The battery management module is installed on one side of one of the honeycomb structure plates facing the intermediate body. The intermediate body is used to be fitted onto the outside of multiple battery packs, and a limiting component for restricting battery displacement is provided inside the intermediate body.

[0019] Optionally, the limiting component includes a base plate and two end plates. The end plates have a hollow structure and are equipped with a fixing frame composed of multiple inclined plates inside. The fixing frame contacts the two inner walls of the end plates. The end plates abut against the battery pack and are located at both ends of the battery pack. The insulating isolation block is fixed to the end plates. The base plate is used to support and hold the battery pack. The two ends of the base plate extend beyond the end face of the battery pack and extend out to fix the end baffles. The side walls of the end baffles of the base plate abut against the battery pack. The limiting component also includes a surrounding plate located on the side of the battery pack. The surrounding plate abuts against the battery pack and is connected to the end plates.

[0020] In summary, this application has the following beneficial technical effects: This application does not require a complex circuit structure; the assembly of the entire battery cell group can be carried out relatively simply by relying on the bus and the terminal blocks. At the same time, the terminal blocks used to contact the positive and negative terminals of the battery cells are relatively independent, no longer making a whole contact like a busbar. Therefore, it is easier to ensure that the contact with each positive and negative terminal is up to standard. In case of failure, targeted disassembly and maintenance can be performed. Thus, this application can improve the convenience of installation and maintenance of the battery pack in the energy storage cabinet and improve the user experience. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this application;

[0022] Figure 2 This is a schematic diagram of the structure after the front cover of this application is hidden;

[0023] Figure 3 This is a partial structural diagram of the shell of this application;

[0024] Figure 4 yes Figure 3 Enlarged schematic diagram of part A.

[0025] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Intermediate body; 12. Front cover; 13. Rear cover; 2. Battery pack; 21. Battery cell; 3. Battery management module; 4. Same-end opposite-position wiring mechanism; 41. Main pressure plate; 411. Guide post; 42. Thermistor unit; 43. Wiring block; 44. Bus; 45. Terminal head; 46. Separator; 5. Insulating isolation block; 51. Spring; 6. Limiting assembly; 61. Base plate; 611. End stop bar; 62. End plate; 63. Enclosure; 64. Ring belt; 7. Slide rail. Detailed Implementation

[0026] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0027] This application discloses an energy storage cabinet.

[0028] Reference Figures 1-3 The energy storage cabinet includes a housing 1 and a battery pack 2 and a battery management module 3 located in the housing 1. The battery pack 2 includes multiple battery cells 21, which are divided into several groups. In this embodiment, two groups are used as an example.

[0029] Two sets of battery cells 21 are arranged side by side, and each set of battery cells 21 is arranged along the width direction. Multiple battery cells 21 are connected in series / parallel by cables to form a large-capacity battery. The battery pack 2 is installed in the housing 1.

[0030] The battery management module 3 includes a BMU / BMS battery management system, whose circuit structure with a controller is integrated into a small box and installed in the housing 1 and electrically connected to the battery pack 2.

[0031] Reference Figure 4 To improve the ease of installation and maintenance of the battery pack 2 in the energy storage cabinet, this application makes the following settings:

[0032] First, the battery cell 21 is set to or selected as a model where the positive and negative terminals are on the same end, so that... Figure 3 Based on this, the positive and negative wiring points face upwards; the distribution direction of the same group of battery cells 21 is perpendicular to the arrangement direction of the positive and negative wiring points of the battery cells 21; secondly, the battery management module 3 is electrically connected to the same-end opposite-position wiring mechanism 4.

[0033] Reference Figure 4 In this embodiment, a group of battery cells 21 are matched with two same-end opposite-end wiring mechanisms 4. The same-end opposite-end wiring mechanism 4 includes a main pressure plate 41, a wiring block 43 and a bus 44.

[0034] The main pressure plate 41 extends along the length of each battery cell 21. The main pressure plate 41 is a thin plate structure that presses on the battery cell 21. A wiring port is provided on the main pressure plate 41 to expose the positive and negative wiring parts of the battery cell 21. The wiring port is a chamfered rectangle when viewed from above and is located above the positive and negative wiring parts.

[0035] The number of busbars 44 corresponds to the total pressure plate 41, extends along the length of the total pressure plate 41 and is located on the side of the total pressure plate 41. The number of terminal blocks 43 corresponds to the positive and negative terminals of the battery cell 21. The terminal blocks 43 are connected to the total pressure plate 41 and contact the positive and negative terminals of the battery cell 21. The terminal blocks 43 are connected to the busbars 44.

[0036] Based on the above configuration, this application does not require a complex wiring structure. The assembly of the entire battery cell 21 can be carried out relatively simply by relying on the bus 44 and the terminal block 43. At the same time, the terminal block 43 used to contact the positive and negative terminals of the battery cell 21 is relatively independent and is no longer a whole contact like a busbar. Therefore, it is easier to ensure that the contact with each positive and negative connection point meets the standard. In case of failure, targeted disassembly and maintenance can be performed. Thus, this application can improve the convenience of installation and maintenance of the battery pack 2 of the energy storage cabinet and improve the user experience.

[0037] In another embodiment of this application, to facilitate the installation and removal of the wiring block 43, specifically:

[0038] The main pressure plate 41 has a recessed groove, and the wiring block 43 can be a square thin plate that fits into the groove. A vertical guide post 411 is formed at the bottom of the groove. The guide post 411 penetrates the through hole on the wiring block 43 for restriction and fixation.

[0039] The above-mentioned design allows the installation and removal of the wiring block 43 to be achieved by pressing and snapping. Therefore, notches and recesses can be formed on the wiring block 43 to facilitate contact by tools and fingers.

[0040] Furthermore, one or two wiring blocks 43 located at the outermost end of each main pressure plate 41 are called end blocks, and the end blocks extend outward toward the end of the battery pack 2 to form an external connection.

[0041] An insulating block 5 is provided outside the battery pack 2. The insulating block 5 is located on the side facing away from the inner wall of the adjacent housing 1 and is fixed. The insulating block 5 can be made of plastic or other poor conductors and is fixed by other structures (described later). A spring 51 is fixed on the insulating block 5. The spring 51 extends toward the inner wall of the adjacent housing 1 and can be fixed to the inner wall.

[0042] According to the above settings, on the one hand, the outermost end block presses down on the main pressure plate 41, the main pressure plate 41 presses down on the battery cell 21, and the terminal block 43 is stuck on the main pressure plate 41. The stages cooperate with each other to achieve the initial positioning of the battery pack 2.

[0043] On the other hand, the battery pack 2 and the inner wall of the casing 1 can be isolated by the cooperation of the insulating block 5 and the spring 51 to reduce abnormal leakage. The spring 51 can also be used for shock absorption.

[0044] In another embodiment of this application, the bus 44 is a composite cable, that is, it is not just a single power line, but also includes a sampling feedback line. The sampling feedback line is electrically connected to a thermal unit 42, such as an NTC thermal sensor, which is in contact with the wiring block 43 to sense the temperature of the wiring block 43, i.e., the battery cell 21, and to provide data support for the overheat management and other operations of the battery management module 3.

[0045] In another embodiment of this application, the difference from the above embodiment is that: if the number of battery cells 21 in the same group is odd, then the outermost terminal block 43 on each total pressure plate 41 is independent, and the other terminal blocks 43 extend towards each other in pairs and are connected as one unit. The thermal sensing unit 42 contacted by the same pair of terminal blocks 43 is one or zero.

[0046] Based on the above settings, the number of thermal units 42 can be reduced to lower costs and make disassembly and assembly simpler.

[0047] Furthermore, the grooves corresponding to each pair of connector blocks 43 are connected to each other, and a protrusion is fixed in the middle, so that the connector blocks 43 have a corresponding notch structure, so as to help lock each pair of connector blocks 43 by using the protrusion to lock the notch structure; a column structure can also be formed on the protrusion, and the column structure penetrates each pair of connector blocks 43.

[0048] Reference Figure 3 and Figure 4In another embodiment of this application, the wiring block 43 is provided with a socket, and a terminal head 45 is inserted into the socket. The terminal head 45 is connected to the thermal unit 42 or a wire. The terminal head 45 includes a terminal plate, and the end of the terminal plate away from the bus 44 is bent to form a U-shaped bend with the opening of the bend facing away from the battery cell 21.

[0049] Based on the above configuration, on the one hand, users only need to hold the terminal head 45 and press it into the socket to connect the wiring block 43 and the bus 44, and connect the wiring block 43 and the thermal unit 42, which is relatively convenient for disassembly; on the other hand, since the terminal head 45 is definitely a thin metal part, it has a certain metal elasticity, and the bent structure can be inserted more firmly to ensure full contact.

[0050] Reference Figure 3 and Figure 4 In another embodiment of this application, two adjacent pressure plates 41 are fixed to each other, such as being formed into one piece. At the same time, two separator strips 46 are fixed in the middle on the side opposite to the battery cell 21. The separator strips 46 are parallel to the pressure plates 41, and the bus 44 is located on the side opposite to each other of the two separator strips.

[0051] The above settings can improve line safety and reduce the probability of abnormal short circuits and other situations.

[0052] Reference Figure 1 and Figure 2 In one embodiment of this application, the housing 1 includes an intermediate body 11 and a front cover 12 and a rear cover 13 located at both ends of the intermediate body 11. The front cover 12, the rear cover 13, and the intermediate body 11 can be fixed with bolts, nuts, or clips after the battery pack 2 and other internal structures are installed. The intermediate body 11 has a hollow structure with a rectangular cross-section and openings at both ends. The battery pack 2 is installed in the intermediate body 11, and the battery management module 3 is installed between the front cover 12 and the battery pack 2, or between the rear cover 13 and the battery pack 2.

[0053] To improve the safety of the battery management module 3, both the front cover 12 and the rear cover 13 are fixed with a reinforcing structure extending along the inner wall of the cover. The reinforcing structure includes a honeycomb structure plate. The reinforcing structure can also be a triangular structure or a rectangular structure, as long as it can increase the structure. This application takes a honeycomb structure as an example: the honeycomb structure plate is fixed to the front cover 12 and the rear cover 13.

[0054] Reference Figure 3 The intermediate body 11 is provided with a limiting component 6 for limiting the displacement of the battery pack 2, which can ensure that the battery pack 2 will not shake or rub inside the housing as much as possible, thereby improving safety. The limiting component 6 is installed on the periphery of the battery pack 2.

[0055] Through the above configuration, the housing 1 is divided into three independent units, and a reinforcing structure is set in the front and rear covers, which increases the convenience of installation and assembly while improving the protective performance of the energy storage cabinet housing 1; the battery pack 2 is limited by the limiting component 6, which effectively prevents the battery from rubbing, shaking, or falling off, reduces the possibility of short circuit and fire, and further improves the protective performance of the protective structure.

[0056] The limiting component 6 includes a base plate 61 and two end plates 62. The two end plates 62 abut against the battery pack 2 and are located at both ends of the battery pack 2. The end plates 62 have a hollow structure with a rectangular cross-section and are open at both ends. The end plates 62 have a fixing frame composed of multiple inclined plates integrally formed inside. When viewed from above, multiple inclined plates inside the end plates 62 can be seen to be spliced ​​into multiple triangles. By connecting two pairs of walls through triangles, the hollow end plates 62 can be made more robust. The hollow design of the end plates 62 can also appropriately enhance their heat dissipation performance.

[0057] The end plate 62 is provided with multiple heat dissipation holes, which simultaneously penetrate the corresponding positions on the fixing frame. The heat dissipation holes are located on the side of the end plate 62 away from the battery, that is, the side of the end plate 62 that abuts against the battery does not have heat dissipation holes, thereby maintaining the protective function of the end plate.

[0058] To further consider structural strength, the heat dissipation holes are staggered, and the spacing between the holes should be no less than twice the hole diameter. The edges of the holes can be reinforced with flanges.

[0059] The end plate 62 away from the bottom plate 61 is bent toward the side of the battery to form a buckle plate. That is, the end plate first extends upward and then bends to the side. After the buckle plate is bent at a right angle, it is tightly fastened to the battery cell 21, which limits the end of the battery facing the middle body and prevents the battery from falling off.

[0060] The base plate 61 is used to support and hold the battery pack 2. Both ends of the base plate extend out of the battery pack and are fixed with end stops 611. The side walls of the end stops of the base plate abut against the battery pack 2 and form a limit.

[0061] A surrounding plate 63 is also provided on the side of the battery pack 2, and the inner wall of the surrounding plate 63 abuts against the battery pack 2. During installation, a ring belt 64 is first laid out, which fits the battery pack 2 and the end plate 62. The ring belt 64 consists of multiple ring belts distributed along the height of the battery cell 21. The surrounding plate 63 is located outside the ring belt 64, and its two ends are fixed to the end plate 62 and the ring belt 64 at both ends, respectively. The connection and fixation can be achieved by bolts and nuts.

[0062] The aforementioned base plate 61 can be made of insulating material, or the positive and negative terminals of the battery cell 21 can both face away from the base plate 61, so that the circuit will not be connected by the base plate 61, thereby improving safety.

[0063] The height of the end plate 62 is less than that of the battery cell 21. The insulating isolation block 5 is installed on the surface of the end plate 62 away from the bottom plate 61. The bottom of the insulating isolation block 5 may be provided with a snap-fit ​​block, which is inserted into the structural groove enclosed by the inclined plate.

[0064] Reference Figure 2 A slide rail 7 is provided on the side of the intermediate body 11 near the base plate 61, wherein the length direction of the slide rail 7 is parallel to the length direction of the intermediate body 11. The base plate 61 is fixed with a slider adapted to the slide rail 7 by bolts. The slider is slidably connected to the slide rail, so that the base plate 61 and the battery cells 21 arranged in groups on the upper part of the base plate 61 can be pushed into the intermediate body 11 during installation. It can be understood that the end of the slide rail 7 may be fixed with a stop block to prevent the base plate 61 from moving at will.

[0065] In one embodiment of this application, the aforementioned BMU / BMS battery management system should at least include an MCU main control board and an on / off control circuit, an analog-to-digital converter, and a current sensor electrically connected thereto. The MCU main control board is connected to the conductive line of bus 44 via the on / off control circuit, and a current sensor is mounted on the conductive line. The current sensor is connected to the MCU main control board via the analog-to-digital converter to meet the basic energy storage control requirements. For example, the on / off control circuit is a transistor switching circuit with a relay coil connected to the collector, and the relay contacts are connected in series with the bus.

[0066] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An energy storage cabinet, comprising a housing (1) and a battery pack (2) and a battery management module (3) located within the housing (1), characterized in that: The battery pack (2) includes multiple battery cells (21), which are divided into several groups. The positive and negative terminals of the battery cells (21) are located at the same end. The distribution direction of the multiple battery cells (21) in the same group is parallel to the width direction of the battery cells (21) and perpendicular to the arrangement direction of the positive and negative terminals of the corresponding battery cells (21). The battery management module (3) is electrically connected to a same-end opposite-position wiring mechanism (4). A group of battery cells (21) are matched with two same-end opposite-position wiring mechanisms (4). The same-end opposite-position wiring mechanism (4) includes a main pressure plate (41), a wiring block (43) and a bus (44). The main pressure plate (41) extends along the length of each battery cell (21), and the main pressure plate (41) has a connection port for exposing the positive and negative connection parts of the battery cell (21) and is located at one end of the battery cell (21) with positive and negative connection parts. The number of the bus (44) corresponds to the total pressure plate (41) and extends along the length of the total pressure plate (41); The number of the wiring blocks (43) corresponds to the positive and negative wiring portions of the battery cell (21). The wiring blocks (43) are connected to the main pressure plate (41) and contact the positive and negative ends of the battery cell (21).

2. The energy storage cabinet according to claim 1, characterized in that: The bus (44) is a composite cable and is connected to several thermal units (42), which are in contact with the wiring block (43).

3. The energy storage cabinet according to claim 2, characterized in that: If the number of battery cells (21) in the same group is odd, then the outermost terminal block (43) on each total pressure plate (41) is independent, and the other terminal blocks (43) are connected in pairs. The thermal unit (42) contacted by the same pair of terminal blocks (43) is one or zero.

4. The energy storage cabinet according to claim 3, characterized in that: The wiring block (43) has an opening, and a terminal head (45) is inserted into the opening. The terminal head (45) is connected to the thermal unit (42) or the bus (44). The terminal head (45) includes a terminal plate. The end of the terminal plate away from the bus (44) is bent to form an elbow, and the opening of the elbow is away from the battery cell (21).

5. The energy storage cabinet according to claim 1, characterized in that: The main pressure plate (41) is recessed to form a groove, and the wiring block (43) is snapped into the groove; One or two terminal blocks (43) located at the outermost end of each of the total pressure plates (41) are called end blocks, and the end blocks extend out of the end face of the battery pack (2) to form an external surface; An insulating block (5) is provided outside the battery pack (2). The insulating block (5) is located on the side facing away from the inner wall of the adjacent housing (1). A spring (51) is fixed on the insulating block (5). The spring (51) extends toward the inner wall of the adjacent housing (1) and abuts against the inner wall.

6. The energy storage cabinet according to claim 5, characterized in that: Two adjacent total pressure plates are fixed to each other and two separators (46) are fixed in the middle on the side opposite to the battery cell (21). The separators (46) are parallel to the total pressure plate (41), and the bus (44) is located on the side opposite to the two separators (46).

7. The energy storage cabinet according to claim 5, characterized in that: The housing (1) includes an intermediate body (11) and a front cover (12) and a rear cover (13) located at both ends of the intermediate body (11). The intermediate body (11) has a hollow structure. The front cover (12) and the rear cover (13) are both connected to a reinforcing structure extending along the inner wall of the cover. The reinforcing structure includes a honeycomb structure plate. The honeycomb structure plate is fixed to the front cover (12) and the rear cover (13). The battery management module (3) is installed on one side of the honeycomb structure plate facing the intermediate body (11). The intermediate body (11) is used to be fitted on the outside of multiple sets of batteries, and a limiting component (6) for limiting battery displacement is provided inside the intermediate body (11).

8. The energy storage cabinet according to claim 7, characterized in that: The limiting component (6) includes a base plate (61) and two end plates (62). The end plates (62) have a hollow structure and are equipped with a fixing frame composed of multiple inclined plates inside. The fixing frame contacts the two inner walls of the end plates (62). The end plates (62) abut against the battery pack (2) and are located at both ends of the battery pack (2). The insulating isolation block (5) is fixed to the end plates (62). The base plate (61) is used to support and hold the battery pack (2). The two ends of the base plate (61) extend out of the end face of the battery pack (2) and extend out to fix the end baffle (611). The side wall of the end baffle (611) of the base plate (61) abuts against the battery pack (2). The limiting component (6) also includes a surrounding plate (63) located on the side of the battery pack (2). The surrounding plate (63) abuts against the battery pack (2) and is connected to the end plates (62).

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