Group force control battery module for echelon utilization

Abstract

The utility model discloses a grouped force control battery module for echelon utilization. The grouped force control battery module comprises an end plate assembly and a fixing assembly, the end part assembly comprises end plate main bodies, a pressure acquisition plate and a pressure sensor, the two end plate main bodies are arranged at the two ends of the battery cells, the pressure acquisition plate is arranged on one side, close to the battery cells, of each end plate main body, and the pressure sensor is arranged between the end plate main bodies and the pressure acquisition plate; each fixing assembly comprises a locking hole, a screw rod and a locking nut, the locking holes are formed in the end plate bodies, and the two ends of the screw rod penetrate through the locking holes of the two end plate bodies respectively and are in threaded connection with the locking nuts. By using the bunching force control battery module for echelon utilization, the bunching force of the battery module can be accurately controlled, and the failure rate and the rework repair rate are reduced. And the consistency of the assembly process is high, and overall management and control in the production process are facilitated. And the device can also be suitable for products of various models, the use amount of special parts is reduced, the universality is high, and material management and control are better facilitated.

Description

Technical Field

[0001] This utility model relates to the field of battery module technology, specifically to a battery module for cascade utilization with pack force control. Background Technology

[0002] With the rapid development of new energy vehicles, a large number of used battery packs have appeared on the market. Since batteries pollute the environment, they need to be recycled and reused. The battery cells dismantled are either used cells or B-grade cells, all of which will be reused. The overall shape of these cells changes after use, and the specific changes vary depending on the number of charge-discharge cycles. Because the dimensional consistency of the recycled cells is very poor, and because the size is closely related to the packing force when assembling the cells, it is difficult to accurately control the packing force. The packing force needs to be the same as the force used in the factory cycle test to prevent power loss during subsequent use.

[0003] Currently, the battery module production process using disassembled battery cells lacks control over assembly force. This necessitates cell size grading, significantly increasing production costs and reducing efficiency. Furthermore, modules typically employ either elastic foam or steel strip assembly. Elastic foam is placed between cells, and the assembly force can be controlled by increasing or decreasing the amount of foam. However, due to significant variations in cell consistency, the number of elastic foam units used in identical battery modules often differs, making it difficult to standardize the assembly process and control overall product quality. Steel strip assembly uses a fixed-size rectangular steel strip around the cells. Since the steel strip is a non-adjustable, dedicated component, a unique steel strip is required for each battery module, resulting in low component versatility. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model proposes a battery module for cascade utilization with pack force control, which can accurately control the pack force of the battery module.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a group force control battery module for cascade utilization, including an end plate assembly and a fixing assembly;

[0006] The end plate assembly includes an end plate body, a pressure acquisition plate, and a pressure sensor. Two end plate bodies are disposed at both ends of multiple battery cells. The pressure acquisition plate is disposed on the side of the end plate body closer to the battery cell. The pressure sensor is disposed between the end plate body and the pressure acquisition plate.

[0007] The fixing component includes a locking hole, a screw, and a locking nut. The end plate body is provided with a locking hole. The two ends of the screw pass through the locking holes of the two end plate bodies respectively and are threadedly connected to the locking nut.

[0008] Two end plates are mounted on both ends of multiple battery cells. A screw passes through two locking holes and connects to a locking nut, fixing the two end plates and clamping the battery cell in the middle, thus forming a complete battery module. After assembly, the pressure between the cells is transmitted to a pressure sensor via a pressure acquisition plate, allowing real-time measurement of the assembly force. The pressure between the cells can be adjusted by rotating the locking nut, thereby regulating the assembly force to the design value.

[0009] The beneficial effects of the aforementioned grouped force control battery module for tiered utilization are:

[0010] (1) It can accurately control the assembly force of the battery module, so that the battery cell assembly is in the most suitable pressure state, reducing the failure rate and rework rate.

[0011] (2) The assembly process of this structure is highly consistent, which is conducive to the overall control of the production process.

[0012] (3) The screw connection method can adjust the spacing, which is suitable for various types of products, reduces the amount of special parts used, has high versatility, and is more conducive to material control.

[0013] Furthermore, a limiting hole is provided on the end plate body, and a stud that can pass through the limiting hole is provided on the pressure acquisition plate.

[0014] Align the studs of the pressure acquisition plate with the limit holes and pass them through, then tighten them with nuts to complete the installation of the end plate body and the pressure acquisition plate.

[0015] Furthermore, a groove is provided on the side of the end plate body near the pressure acquisition plate, and the pressure sensor can be placed in the groove.

[0016] The groove is used to place the pressure sensor between the end plate body and the pressure acquisition plate.

[0017] Furthermore, the pressure sensor includes a mounting plate, a force plate, strain gauges, a data acquisition circuit, and a communication socket. The mounting plate is equipped with the data acquisition circuit and has multiple force plates arranged circumferentially. Each force plate is equipped with multiple strain gauges, which are connected to the data acquisition circuit. The data acquisition circuit is connected to an external reading device through the communication socket.

[0018] After the battery modules are assembled, the cell pressure is transmitted to the strain gauges on the stress plate through the pressure acquisition plate. The strain gauges will deform slightly, and the amount of deformation is transmitted as an electrical signal through the acquisition circuit. The acquisition circuit is connected to a communication socket, and the external reading device receives the electrical signal through the communication device and converts it into a pressure transformation value, so as to obtain the real-time pressure data, in order to adjust the assembly force of the battery modules.

[0019] Furthermore, a fixing post is provided in the groove, and a through hole is provided. The mounting plate is provided with mounting holes that are adapted to the fixing post, and the communication socket can pass through the through hole.

[0020] The mounting post is used for quick installation of the pressure sensor, and the through hole is used for the communication socket to extend and connect to communication equipment. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0022] Figure 1 A schematic diagram of a grouped force control battery module for cascade utilization provided in an embodiment of this utility model;

[0023] Figure 2 for Figure 1 An exploded view of an end plate assembly for a grouped force-controlled battery module for secondary use is shown.

[0024] Figure 3 for Figure 2 The diagram shows a pressure sensor for a group force control battery module used in cascade utilization;

[0025] Figure 4 for Figure 2 The diagram shows another side of the end plate body of a group force control battery module for cascade utilization;

[0026] Figure label:

[0027] 10-End plate assembly, 11-End plate body, 111-Limiting hole, 112-Groove, 113-Fixing post, 12-Pressure acquisition plate, 121-Stud, 13-Pressure sensor, 131-Mounting plate, 132-Force plate, 133-Strain gauge, 134-Acquisition circuit, 135-Communication socket;

[0028] 20-Fixing component, 21-Locking hole, 22-Screw, 23-Locking nut. Detailed Implementation

[0029] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0030] Please see Figures 1 to 4This utility model provides a group force control battery module for cascade utilization, including an end plate assembly 10 and a fixing assembly 20. The end plate assembly 10 is used to install the battery module, and the fixing assembly 20 is used to fix the module as a whole and adjust the pressure.

[0031] Specifically, such as Figure 1 and Figure 2 As shown, the end plate assembly includes an end plate body 11, a pressure acquisition plate 12, and a pressure sensor 13. Two end plate bodies 11 are respectively disposed at both ends of multiple battery cells. The pressure acquisition plate 12 is disposed on the side of the end plate body 11 closest to the battery cells. The pressure sensor 13 is disposed between the end plate body 11 and the pressure acquisition plate 12. The fixing assembly 20 includes locking holes 21, screws 22, and locking nuts 23. Locking holes 21 are provided on the side of the end plate body 11. Both ends of the screw 22 pass through the locking holes 21 of the two end plate bodies 11 respectively and are threadedly connected to the locking nuts 23.

[0032] After the screw 22 passes through the two locking holes 21, it is threadedly connected to the screw 22 and pressed against the outside of the locking holes 21 by the locking nut 23, thus fixing the two end plate bodies 11 and clamping the middle battery cell to form an integral battery module. After assembly, the pressure between the battery cells is transmitted to the pressure sensor 13 through the pressure acquisition plate 12, so that the assembly force of the battery module can be obtained in real time. Rotating the locking nut 23 can adjust the pressure between the battery cells, thereby adjusting the assembly force to the design value.

[0033] Specifically, the end plate body 11 has multiple limiting holes 111, and the pressure acquisition plate 12 has studs 121 that can pass through the limiting holes 111. After aligning the studs 121 of the pressure acquisition plate 12 with the limiting holes 111 and passing them through, the end plate body 11 and the pressure acquisition plate 12 are locked in place by nuts, thus completing the installation of the end plate body 11 and the pressure acquisition plate 12.

[0034] A groove 112 is provided on the side of the end plate body 11 near the pressure acquisition plate 12 for placing the pressure sensor 13 between the end plate body 11 and the pressure acquisition plate 12. In this embodiment, after installation, there is a 1mm gap between the end plate body 11 and the pressure acquisition plate 12 to allow space for the pressure sensor 13 to deform.

[0035] Specifically, such as Figure 3 As shown, the pressure sensor 13 includes a mounting plate 131, a force plate 132, strain gauges 133, a data acquisition circuit 134, and a communication socket 135. The mounting plate 131 is provided with the data acquisition circuit 134, and multiple force plates 132 are arranged around the circumference. Multiple strain gauges 133 are provided on each force plate 132. The strain gauges 133 are connected to the data acquisition circuit 134. The data acquisition circuit 134 is connected to the communication socket 135, which can connect to a communication device to transmit signals to an external reading device.

[0036] After the battery modules are assembled, the cell pressure is transmitted to the strain gauge 133 of the force plate 132 through the pressure acquisition plate 12. The strain gauge 133 undergoes slight deformation, and the amount of deformation is transmitted as an electrical signal through the acquisition circuit 134. The external reading device receives the electrical signal through the communication device and converts it into a pressure conversion value, so as to obtain the real-time pressure data and adjust the assembly force of the battery modules.

[0037] like Figure 4 As shown, a fixing post 113 is provided in the groove 112 and a through hole is provided. The mounting plate 131 is provided with a mounting hole that matches the fixing post 113 for quick installation of the pressure sensor 13. The through hole is used for the communication socket to extend and connect to the communication equipment.

[0038] The working principle of the aforementioned battery module for tiered utilization with pack force control is as follows: The end plate body 11 is installed at both ends of multiple battery cells. After the screw 22 passes through the locking holes 21 at both ends, it is connected to the screw via a locking nut 23 and pressed against the outside of the locking holes 21. This fixes the two end plate bodies 11 and clamps the middle battery cell, thus forming an integral battery module. After packing, the pressure between the battery cells is transmitted to the pressure sensor 13 via the pressure acquisition plate 12, allowing real-time acquisition of the packing force of the battery module. By rotating the locking nut 23 to adjust the pressure between the battery cells, the packing force can be adjusted to the design value.

[0039] Using the aforementioned battery module with assembly force control for secondary use allows for precise control of the assembly force, ensuring optimal pressure during cell assembly and reducing failure and rework rates. Furthermore, this assembly structure offers high consistency, facilitating overall production process control. Additionally, the screw connection allows for adjustable spacing, making it widely applicable to various product models, reducing the need for specialized parts, enhancing versatility, and improving material management.

[0040] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this 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, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A battery module for cascaded utilization with batch force control, characterized in that: Includes endplate assemblies and fixing assemblies; The end plate assembly includes an end plate body, a pressure acquisition plate, and a pressure sensor. Two end plate bodies are disposed at both ends of multiple battery cells. The pressure acquisition plate is disposed on the side of the end plate body closer to the battery cell. The pressure sensor is disposed between the end plate body and the pressure acquisition plate. The fixing component includes a locking hole, a screw, and a locking nut. The end plate body is provided with locking holes. The two ends of the screw pass through the locking holes of the two end plate bodies respectively and are threadedly connected to the locking nuts. The end plate body has a limiting hole, and the pressure acquisition plate is provided with a stud that can pass through the limiting hole; The end plate body has a groove on the side near the pressure acquisition plate, and the pressure sensor can be placed in the groove; The pressure sensor includes a mounting plate, a force plate, strain gauges, a data acquisition circuit, and a communication socket. The mounting plate is equipped with the data acquisition circuit and has multiple force plates arranged around its circumference. Each force plate is equipped with multiple strain gauges, which are connected to the data acquisition circuit. The data acquisition circuit is connected to an external reading device through the communication socket. The groove is provided with a fixing post and a through hole. The mounting plate is provided with mounting holes that are adapted to the fixing post, and the communication socket can pass through the through hole.

Images