An energy storage battery pack and energy storage system

Abstract

This utility model relates to the field of energy storage technology and discloses an energy storage battery pack and energy storage system, including battery cells, a battery cell conduction unit, and a battery cell fixing unit. The battery cell conduction unit includes a housing with at least one row of placement slots inside. Multiple battery cells are arranged in the placement slots, with the terminals of the battery cells located at the slot openings. The terminals on the same side of any two adjacent battery cells have opposite polarities. The battery cell conduction unit includes multiple electrode plates that abut against the terminals on the same side of adjacent battery cells from bottom to top, thereby connecting the entire row of battery cells in a serpentine series. The battery cell fixing unit also includes multiple base plates that form the bottom of the placement slots. The arrangement of each base plate corresponds to a battery cell and is detachably fixed to the housing. By abutting the battery cells from bottom to top with the electrode plates, and then making the base plates forming the bottom of the placement slots detachable, a magazine-like quick assembly and disassembly of the target battery cells can be achieved, which has the advantages of convenient and fast maintenance and simple structure.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to an energy storage battery pack and energy storage system. Background Technology

[0002] Typical energy storage battery packs are usually composed of multiple individual battery cells connected by laser-welded aluminum busbars to achieve energy storage and conduction. However, this connection method has shortcomings in certain application scenarios, including complex assembly, inconvenient transportation and disassembly, and difficult maintenance.

[0003] To address the aforementioned issues, existing technologies, such as patent CN221632758U, propose an improved solution: integrating the aluminum busbar assembly into a bottom support plate and fixing the battery cells to the support plate using a cell fixing assembly, thereby replacing the laser welding connection method by having the battery cell electrodes abut against the aluminum busbar assembly. While this solution simplifies the welding process to some extent through the abutment method, it still has the following problems: using an integral aluminum busbar assembly to connect all the battery cells means that if a battery cell is damaged or a certain electrode has poor contact, the entire module needs to be repaired, making it difficult to accurately locate the fault and hindering the rapid removal of the faulty battery cell. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an energy storage battery pack and energy storage system. By having the electrode plates press against the battery cells from bottom to top, and then making the base plate forming the bottom of the placement slot removable, it achieves a magazine-style quick installation and removal of the target battery cells. This has the advantages of convenient and fast maintenance and a simple structure. The solution of this invention is as follows: An energy storage battery pack includes battery cells, a battery cell conduction unit, and a battery cell fixing unit. The battery cell conduction unit includes a housing with at least one row of placement slots inside. Multiple battery cells are disposed in the placement slots, and the terminals of the battery cells are located at the slot openings. The polarities of the terminals on the same side of any two adjacent battery cells are opposite. The battery cell conduction unit includes multiple electrode plates that abut against the terminals on the same side of adjacent battery cells from bottom to top, thereby connecting the entire row of battery cells in a serpentine series. The battery cell fixing unit also includes multiple base plates for forming the bottom of the placement slots. The arrangement of each base plate corresponds to each battery cell, and the base plates are detachably fixed to the housing.

[0005] In this way, the base plate serves as the bottom of the individual placement slot for support, and the other end is abutted by the electrode plate. When a cell in a single housing cavity fails, it is only necessary to remove the base plate in the corresponding housing cavity and then replace the faulty cell.

[0006] Preferably, the electrode is rigid and abuts against the terminal of the battery cell via a prism. In this way, a reliable abutment between the rigid conductor (electrode) and the terminal of the battery cell is achieved through an elastic element (prism), which is used to compensate for tolerances, ensure contact pressure, and buffer vibration.

[0007] Preferably, the cell fixing unit further includes multiple rigid pressure bars, which are fixed to the slot opening and contact the non-pole area of ​​the corresponding end face of the cell; the cell conduction unit further includes an insulating base, which is fixed to the pressure bars, and the insulating base is used to install the electrode pieces by bolts. In this way, the electrode pieces are installed through the insulating base, and the upper end of the cell is limited by the pressure bars.

[0008] Preferably, the enclosure includes side panels, a first grid, and a second grid; multiple first grids and multiple second grids are embedded between two opposing side panels to divide the space between the two side panels into multiple rectangular spaces, thus forming placement slots. The seat plate is detachably installed on the side panels by bolts; the first grid is thicker than the second grid, and connection points for installation with pressure strips are formed on the first grid. This achieves improved structural strength and internal space allocation within the enclosure.

[0009] Preferably, the base plate is provided with countersunk holes for mounting bolts. In this way, the countersunk holes ensure that the bolts on the base plate do not protrude.

[0010] Preferably, at least one of the first grille, the second grille, and the side plate has a pre-reserved passage for installing water cooling. In this way, the structural components themselves are used as a heat dissipation medium, and the battery is thermally managed directly and efficiently through the internally circulating coolant, thereby optimizing space utilization and improving the overall heat dissipation uniformity and efficiency.

[0011] Preferably, the bolt secures the electrode to the insulating base via an elastic structure. Thus, through the combined action of the bolt and the elastic structure, the electrode is elastically pressed against the insulating base, achieving stable and reliable electrical contact.

[0012] An energy storage system includes multiple energy storage battery packs as described above, and cables for connecting the multiple energy storage battery packs in series. This facilitates on-demand configuration of the multiple battery packs according to actual production needs.

[0013] Preferably, it also includes wiring harnesses for connecting and aggregating the battery management systems of multiple energy storage battery packs in series. Thus, depending on the scale of the energy storage device, this new type of energy storage battery pack is equipped with batteries that connect the positive and negative terminals of different batteries in series via cables to form battery clusters. The wiring harnesses then aggregate and process the battery management system information of each battery pack, enabling real-time monitoring of the status of all batteries in the cluster.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: The above scheme uses plates to press against the battery cell from bottom to top, and then the base plate that forms the bottom of the placement slot is detachable. After the base plate is removed, the battery cell falls automatically under gravity, quickly completing the disassembly and assembly. This achieves a magazine-style quick disassembly and assembly of the target battery cell, which has the advantages of convenient and fast maintenance and simple structure. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the device; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 for Figure 1 A structural diagram of the device with all other structures removed, leaving only the box body; Figure 4 for Figure 1 A schematic diagram showing the connection between one of the pole pieces and the corresponding prism in the device; Figure 5 for Figure 1 A schematic diagram of the countersunk hole installation on one of the base plates in the device.

[0017] Explanation of reference numerals in the attached drawings: 1. Box body; 11. First grille; 12. Second grille; 13. Side panel; 21. Pressure strip; 22. Electrode sheet; 23. Insulating base; 24. Elastic structure; 25. Prism; 3. Seat plate; 31. Countersunk hole; 4. Battery cells. Detailed Implementation

[0018] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0019] To improve or address the problems of inconvenient disassembly, high maintenance costs, and high failure rates in existing equipment, this utility model provides an energy storage battery pack.

[0020] This energy storage battery includes a cell 4, a cell conduction unit, and a cell fixing unit. The cell conduction unit includes a housing 1, which has at least one row of placement slots. Multiple cells 4 are arranged in the placement slots, and the terminals of the cells 4 are located at the slot openings. The terminals of two adjacent cells 4 on the same side have opposite polarities. The cell conduction unit includes multiple electrode plates 22, which abut against the terminals on the same side of adjacent cells 4 from bottom to top, thereby connecting the entire row of cells 4 in a serpentine series. The cell fixing unit also includes multiple base plates 3 for forming the bottom of the placement slots. The arrangement of each base plate 3 corresponds to each cell 4, and it is detachably fixed to the housing 1.

[0021] This utility model uses a base plate 3 as the bottom of a single placement slot for support, and the other end is abutted by an electrode 22. When a cell in a single housing cavity fails, it is only necessary to remove the base plate 3 in the corresponding housing cavity and then replace the faulty cell. On the other hand, since the electrode 22 is only connected to the same side of adjacent cells, the electrode can be quickly replaced when a continuity failure occurs, thus improving the initiative and speed of maintenance.

[0022] To ensure a tight fit between the electrode 22 and the battery cell 4, preferably, the electrode 22 is rigid and abuts against the electrode post of the battery cell 4 through the prism 25.

[0023] In this way, a reliable contact is achieved between the rigid conductor (electrode 22) and the four terminals of the battery cell through the elastic element (prism 25), which is used to compensate for tolerances, ensure contact pressure and buffer vibration.

[0024] To ensure tight contact between the electrode 22 and the electrode of the cell 4, preferably, the cell fixing unit also includes multiple rigid pressure strips 21, which are fixed to the slot opening and contact the non-pole area of ​​the corresponding end face of the cell 4; the cell conduction unit also includes an insulating base 23 to be fixed at the pressure strips 21, and the electrode 22 is installed on the insulating base 23 by bolts.

[0025] The insulating base 23 is used to isolate the electrode 22 from the rigid pressure strip 21. Since the rigid pressure strip 21 is made of a relatively rigid metal material, and the housing 1 is generally also made of a metal material with good compressive strength, in order to reduce the probability of leakage in the battery pack, in this preferred embodiment, the electrode 22, insulating base 23, and rigid pressure strip 21 can be installed together on the housing 1 using limiting bolts and insulating structures such as insulating gaskets or sleeves. Alternatively, the rigid pressure strip 21 can be fixed to the housing 1 first with other bolts, and then the electrode 22 and the insulating base 23 can be isolated using limiting bolts. The base 23 can be slightly movable and installed on the rigid pressure strip 21. Alternatively, the rigid pressure strip 21 can be fixed to the housing 1 first, and then the insulating base 23 can be fixed to the rigid pressure strip 21. Finally, the electrode 22 can be installed on the insulating base 23 by limiting bolts. The aforementioned first installation method indirectly fixes the battery cell 4 through the elastic structure 24. Since the rigid pressure strip 21 mainly plays the role of fixing the corresponding end face of the battery cell 4, the structural strength requirement of the elastic structure 24 is too high. Of course, it can be selected according to the actual production conditions, and no specific limitation is made in this utility model.

[0026] To improve the structural strength and internal space allocation of the housing 1, the preferred configuration is as follows: the housing 1 includes side panels 13, first grilles 11, and second grilles 12; multiple first grilles 11 and multiple second grilles 12 are embedded between two opposing side panels 13 to divide the space between the two side panels 13 into multiple rectangular spaces, thereby forming a placement groove; the seat plate 3 is detachably installed on the side panels 13 by bolts; the first grille 11 is thicker than the second grille 12, and connection points for installation with the pressure strip 21 are formed on the first grille 11.

[0027] This combination method can be achieved through welding of the plates, and the spacing is convenient, which helps to make the solution economical.

[0028] Considering that the rigid strip 21 needs to be fixed to the box 1, two types of grilles are derived. The second grille 12 has the functions of separation and wrapping. The first grille 11 has all the functions of the second grille 12 and also has space for fixed installation on the rigid strip 21, which makes the first grille 11 thicker. The second grille 12 only needs to have the function of separation. This is a reasonable allocation of the limited internal space of the box 1.

[0029] To enhance the ease of disassembly and repair of the base plate 3 and the flatness of the overall battery pack structure, preferably, the base plate 3 is provided with countersunk holes 31 for mounting bolts, which ensures that the bolts on the base plate 3 do not protrude.

[0030] In this way, the countersunk hole 31 on the base plate 3 is used to achieve flat installation of the bolts, ensuring that there is no protrusion on the mounting surface, thereby avoiding interference and short circuit with the internal battery cells and conductors, optimizing the structural space, and improving assembly safety and reliability.

[0031] To ensure the integrity of the battery pack function, preferably, at least one of the first grille 11, the second grille 12, and the side plate 13 has a reserved passage for installing water cooling.

[0032] In the above design, reserving water cooling passages in the first grille 11, the second grille 12, or the side plate 13 means integrating the above structural components with the liquid cooling system to form a cooling flow channel inside.

[0033] This design utilizes the structural components themselves as a heat dissipation medium, and directly and efficiently manages the battery's thermal performance through internally circulating coolant, thereby optimizing space utilization and improving overall heat dissipation uniformity and efficiency.

[0034] Preferably, the bolt presses the electrode 22 onto the insulating base 23 elastically through the elastic structure 24. The electrode 22 is elastically pressed onto the insulating base 23 through the synergistic action of the bolt and the elastic structure 24, thereby achieving stable and reliable electrical contact.

[0035] This utility model also provides an energy storage system, including multiple energy storage battery packs as described above, and cables for connecting the multiple energy storage battery packs in series.

[0036] This allows for the allocation of multiple battery packs as needed, based on actual production conditions.

[0037] Preferably, it also includes a wiring harness for connecting and summarizing the battery management systems of multiple energy storage battery packs in series.

[0038] Depending on the scale of the energy storage equipment, this new type of energy storage battery pack is equipped. The positive and negative terminals of different batteries are connected in series by cables to form a battery cluster. The battery management system information of each battery pack is collected and processed by the wiring harness to monitor the status of all batteries in the battery cluster in real time.

[0039] by Figures 1 to 5 The following example illustrates the entire workflow.

[0040] Because the thicknesses of the first grid 11 and the second grid 12 are different, the distances between adjacent cells 4 on the same side are not the same. Therefore, firstly, according to the actual requirements, select the electrode sheets 22 of different lengths required for the battery pack, check for defects or other unstable factors in the elastic structure 24, and check for cracks in the rigid pressure strip 21 and the insulating base 23. Then, install the electrode sheets 22 onto the insulating base 23 using the elastic structure 24 (in this embodiment, multiple insulating bases 23 are provided, each corresponding to one electrode sheet 22), and then install the insulating base 23 onto the rigid pressure strip 21. Finally, install the rigid pressure strip 21 onto the receiving structure of the first grid 11. The rigid pressure strip 21 must be made of high-strength steel to ensure its durability and yield strength, and check whether the installation is secure. Furthermore, the rigid pressure strip 21 can be a single piece extending along the length of the housing 1 or multiple pieces spliced ​​together. The advantage of multiple splices is that it is easier for workers to disassemble the rigid pressure strip 21 from above. The advantage of a single piece is that multiple splices mean that the rigid pressure strip 21 needs to be disassembled from the first grid 1. The installation space of the two adjacent ends of the rigid pressure strips 21 is reserved on the 11; prepare the battery cell 4 and place it in the receiving cavity on the housing 1, keeping the electrode facing upward and in contact with the prism 25 of the electrode plate 22; fix the base plate 3 to the corresponding installation position on the housing 1 with bolts 2, so that the electrode of the battery cell 4 is in close contact with the prism 25, and the elastic structure 24 provides elastic force to prevent the electrode from loosening when in contact with the prism 25; according to the scale of the energy storage equipment, this type of energy storage battery pack is equipped, and the positive and negative terminals of different batteries are connected in series by cables to form a battery cluster, and the battery management system information of each battery pack is collected and processed by the wiring harness to monitor the status of all batteries in the battery cluster in real time; if a single battery cell in any battery pack in the battery cluster fails, it is only necessary to locate its location, and the engineer can temporarily disconnect the connection of the relevant battery pack to the grid, remove the bolts on the base plate 3 with tools to take out the faulty battery, replace it with a new battery, install the base plate 3, and reconnect the battery pack to the grid to complete the fault repair.

[0041] This invention eliminates the need for multiple steps such as matching, packaging, welding, and assembly required in traditional battery manufacturing. Instead, it directly performs matching and installation in just two steps, requiring only a single battery pack. This saves battery manufacturers production time, eliminates the need for battery welding equipment and production lines, and significantly reduces production costs. If a battery pack malfunctions, the cause can be traced to either the battery itself or a component. Maintenance costs are low, and the technical requirements for repairs are minimal, further reducing the maintenance costs of battery clusters or energy storage stations.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An energy storage battery pack, characterized in that, The system includes a battery cell (4), a battery cell conduction unit, and a battery cell fixing unit. The battery cell conduction unit includes a housing (1) with at least one row of placement slots inside. Multiple battery cells (4) are provided and are respectively placed in the placement slots. The terminals of the battery cells (4) are located at the slot openings. The polarities of the terminals on the same side of any two adjacent battery cells (4) are opposite. The battery cell conduction unit includes multiple electrode plates (22) to connect and conduct the terminals on the same side of adjacent battery cells (4) from bottom to top, thereby connecting the entire row of battery cells (4) in a serpentine series. The cell fixing unit also includes multiple base plates (3) for forming the bottom of the placement slot. The arrangement position of each base plate (3) corresponds to each cell (4) and is detachably fixed to the housing (1).

2. The energy storage battery pack according to claim 1, characterized in that, The electrode (22) is rigid and abuts against the electrode post of the cell (4) through the prism (25).

3. The energy storage battery pack according to claim 2, characterized in that, The cell fixing unit also includes multiple rigid pressure strips (21), which are fixed to the slot opening and contact the non-pole area of ​​the corresponding end face of the cell (4); The cell conduction unit also includes an insulating base (23) for fixing to the pressure bar (21), and the insulating base (23) is mounted on the electrode plate (22) by bolts.

4. The energy storage battery pack according to claim 3, characterized in that, The box body (1) includes a side plate (13), a first grille (11) and a second grille (12); multiple first grilles (11) and multiple second grilles (12) are embedded between two opposite side plates (13) to divide the two side plates (13) into multiple rectangular spaces to form a placement slot body, and the seat plate (3) is detachably installed on the side plate (13) by bolts. The first grid (11) is thicker than the second grid (12), and connection points for installation with the pressure strip (21) are formed on the first grid (11).

5. The energy storage battery pack according to claim 4, characterized in that, The base plate (3) is provided with countersunk holes (31) for mounting bolts.

6. A battery pack for energy storage according to claim 4 or 5, characterized in that, At least one of the first grille (11), the second grille (12), and the side plate (13) has a passage reserved for installing water cooling.

7. An energy storage battery pack according to claim 3, 4, or 5, characterized in that, The bolts elastically press the electrode (22) onto the insulating base (23) through the elastic structure (24).

8. An energy storage system, characterized in that, It includes multiple energy storage battery packs as described in claim 1, and also includes cables for connecting the multiple energy storage battery packs in series.

9. An energy storage system according to claim 8, characterized in that, It also includes wiring harnesses, which are used to connect and aggregate the battery management systems of multiple energy storage battery packs in series.

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