CTP battery pack

Abstract

The utility model provides a CTP battery pack. The CTP battery pack comprises a plurality of battery cell modules, a box body and a bottom protection plate, each battery cell module comprises a liquid cooling plate and a battery cell group, the bottom of the battery cell group is connected with the top of the liquid cooling plate, and a plurality of first mounting grooves are formed in the edge of the liquid cooling plate. The plurality of battery cell modules are accommodated in the box body, a plurality of second mounting grooves are formed in the box body, and the second mounting grooves are in one-to-one correspondence with the first mounting grooves. And the bottom protection plate is arranged below the box body. According to the CTP battery pack disclosed by the utility model, when the battery cells in the battery pack break down, the battery cell modules which break down can be independently disassembled and replaced, so that the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of batteries, specifically to a CTP battery pack. Background Technology

[0002] With increasing global awareness of environmental protection and the transformation of energy structures, the new energy vehicle industry has ushered in unprecedented development opportunities. In recent years, the penetration rate of new energy vehicles has increased significantly, and the consumer base has expanded rapidly. This trend has directly driven the rapid growth of new energy vehicle production and sales. As a core component of new energy vehicles, the innovation of power battery technology has become a key force driving the development of the entire industry. In the past few years, power battery technology has undergone rapid development, achieving significant progress not only in energy density and charging efficiency, but also in integration efficiency with the vehicle. This improvement has not only increased the driving range of electric vehicles but also brought significant lightweight benefits, laying a solid foundation for the prosperity of the new energy vehicle market.

[0003] To further improve battery pack integration efficiency and reduce costs, CTP (Cell To Pack) technology has emerged and gradually become the industry mainstream. CTP technology achieves direct integration between the cells and the battery pack by minimizing the number of internal structural components, thereby improving the energy density and overall performance of the battery pack. Currently, mainstream CTP solutions fall into two main categories: one completely eliminates the module stage, integrating the cells directly into the battery pack; the other uses simplified modules to replace traditional modules, which only include the cells, end plates, and necessary components such as steel strips or straps. This design not only simplifies the battery pack structure but also reduces production costs, providing strong support for the popularization of new energy vehicles. In the manufacturing process of CTP battery packs, a hybrid structural thermally conductive adhesive with super-strong adhesion and high thermal conductivity is typically used to fix the cells or simplified modules, ensuring the stability and safety of the battery pack.

[0004] However, the extremely high bonding strength of the structural thermally conductive adhesive after curing makes non-destructive disassembly of the battery pack difficult when a malfunction occurs. This means that if a cell fails, it is often impossible to replace the faulty cell alone; the entire battery pack must be replaced. This not only increases maintenance costs but also reduces the maintainability of the battery pack. Furthermore, CTP battery packs are relatively difficult to recycle. Due to their complex structure and difficulty in disassembly, the recycling process easily leads to resource waste and environmental pollution. Therefore, how to improve the maintainability and recyclability of CTP battery packs while ensuring high performance has become a pressing issue for the new energy vehicle industry. Utility Model Content

[0005] The purpose of this invention is to propose a repairable CTP battery pack, which solves the problem that when the cells in the current battery pack have quality problems or malfunctions, the entire pack must be replaced, and the repair costs are high.

[0006] To achieve the above objectives, this utility model proposes a CTP battery pack, comprising:

[0007] Multiple battery cell modules, each battery cell module including a liquid cooling plate and a battery cell assembly, the bottom of the battery cell assembly being connected to the top of the liquid cooling plate, and the edge of the liquid cooling plate being provided with multiple first mounting grooves;

[0008] The housing contains the plurality of battery cell modules, and the housing is provided with a plurality of second mounting slots, each of which corresponds to a first mounting slot.

[0009] A bottom protective plate is located at the bottom of the enclosure.

[0010] In one embodiment, the edge of the liquid cooling plate is provided with a plurality of first mounting grooves at uniform intervals.

[0011] In one embodiment, the area at the bottom of the battery cell assembly is smaller than the area at the top of the liquid cooling plate, and the edge of the liquid cooling plate is the portion of the liquid cooling plate not covered by the battery cell assembly.

[0012] In one embodiment, the bottom of the battery cell assembly is bonded to the top of the liquid cooling plate.

[0013] In one embodiment, the top of the liquid cooling plate is coated with thermally conductive structural adhesive, and the bottom of the battery cell assembly is connected to the top of the liquid cooling plate via the thermally conductive structural adhesive.

[0014] In one embodiment, the cell module is mounted in the housing by a first fastener.

[0015] In one embodiment, the housing includes a frame and an inner frame, the inner frame being disposed inside the frame, and the area enclosed by the frame and the inner frame accommodating the battery cell module, and the second mounting slot being disposed on the frame and the inner frame.

[0016] In one embodiment, the front and rear ends of the battery cell assembly respectively abut against the internal frame.

[0017] In one embodiment, the internal frame includes one or more crossbeams and longitudinal beams, which are perpendicular to each other and enclose multiple areas to accommodate the battery cell module.

[0018] In one embodiment, the first mounting slot and the second mounting slot are connected by a second fastener.

[0019] The CTP battery pack of this utility model has the following beneficial effects:

[0020] This utility model provides a repairable CTP battery pack, which integrates battery cells and liquid cooling plates with mounting slots into battery cell modules, as well as cross and longitudinal beams and a battery box with corresponding mounting slots. Compared with existing CTP technology, it enables battery cell modules to be detachably installed on the battery box by area. When a battery cell fails, the faulty battery cell module can be disassembled and replaced individually, reducing maintenance costs. Attached Figure Description

[0021] Figure 1 This is an exploded structural diagram of a CTP battery pack according to an embodiment of the present invention;

[0022] Figure 2 This is an exploded structural diagram of a CTP battery pack cell module according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the area distribution of the first mounting slot of the CTP battery pack cell module according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram showing the regional distribution of the second mounting slot in the battery box of a CTP battery pack according to an embodiment of the present invention.

[0025] Figure Labels

[0026] 101. Housing; 1011. Frame; 1012. Internal frame; 1013. Second mounting slot; 102. Battery cell module; 1021. Liquid cooling plate; 1022. Thermally conductive structural adhesive; 1023. Battery cell assembly; 1024. First mounting slot; 103. Base plate. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not intended to limit the utility model.

[0028] like Figure 1As shown, this utility model proposes a CTP battery pack, including: a housing 101, multiple cell modules 102, and a bottom protective plate 103. Each cell module 102 includes a liquid cooling plate 1021 and a cell assembly 1023. The bottom of the cell assembly 1023 is connected to the top of the liquid cooling plate 1021, and the edge of the liquid cooling plate 1021 is provided with multiple first mounting slots 1024. The housing 101 houses multiple cell modules 102, and the housing 101 is provided with multiple second mounting slots 1013. The second mounting slots 1013 correspond one-to-one with the first mounting slots 1024, realizing a detachable connection between the cell module 102 and the housing 101. The shape, number, and spacing of the first mounting slots 1024 and the second mounting slots 1013 can be selected according to various factors such as the structure and weight of the cell assembly 1023, the type of liquid cooling plate 1021, and the size of the battery housing 101. The second mounting slots 1013 are matched with the first mounting slots 1024. In this preferred embodiment, the first mounting slot 1024 and the second mounting slot 1013 are connected by a second fastener. The type and quantity of fasteners can be selected according to requirements. This is also the key to achieving a detachable connection between the cell module 102 and the housing 101. The cell module 102 can be firmly fixed inside the battery housing 101 while maintaining detachability for easy maintenance and replacement. The bottom protective plate 103 is located at the bottom of the housing 101, serving to protect the cell module and prevent damage to the cell module when the battery pack is subjected to bottom impacts. It also helps maintain the overall structural stability of the battery pack. During the entire operation of the CTP battery pack, the heat generated by the cells is transferred to the liquid cooling plate through the thermally conductive structural adhesive, and then the heat is carried away by the circulating cooling medium of the liquid cooling system, achieving heat dissipation of the battery pack. At the same time, the robust frame of the battery housing and the bottom protective plate provide good protection and support for the battery pack.

[0029] like Figure 3 As shown, in this embodiment, the edge of the liquid cooling plate 1021 is provided with a plurality of first mounting grooves 1024 at uniform intervals. The area of ​​the bottom of the cell assembly 1023 is smaller than the area of ​​the top of the liquid cooling plate 1021, and the edge of the liquid cooling plate 1021 is the part of the liquid cooling plate 1021 not covered by the cell assembly 1023.

[0030] Furthermore, the bottom of the battery cell assembly 1023 is bonded to the top of the liquid cooling plate 1021. In this embodiment, a thermally conductive structural adhesive 1022 is applied to the top of the liquid cooling plate 1021, and the bottom of the battery cell assembly 1023 is connected to the top of the liquid cooling plate via the thermally conductive structural adhesive. See [link to documentation]. Figure 2 In this embodiment, the battery cells are neatly arranged to form a battery cell group 1023. The bottom of each battery cell is bonded to the liquid cooling plate 1021 by a thermally conductive structural adhesive 1022 to ensure that the heat generated by the battery cell can be effectively transferred to the liquid cooling plate for heat dissipation.

[0031] Furthermore, the cell module 102 is installed inside the housing 101 via a first fastener. Faulty cell modules in each area can be replaced by disassembling the base plate 103 and the fasteners, reducing maintenance costs. Moreover, since the cell module 102 is connected to the battery housing 101 via fasteners, the mechanical performance of the battery pack is improved compared to traditional CTP batteries, significantly enhancing battery safety. Specifically, the fasteners can be bolts, nuts, screws, etc.

[0032] Furthermore, the housing 101 includes a frame 1011 and an inner frame 1012, with the inner frame 1012 disposed inside the frame 1011. The area enclosed by the frame 1011 and the inner frame 1012 accommodates the battery cell module 102. A second mounting slot 1013 is disposed on the frame 1011 and the inner frame 1012. (See also...) Figure 4 .like Figure 1 As shown, the front and rear ends of the battery cell assembly 1023 respectively abut against the internal frame 1012. In this embodiment, the internal frame 1012 includes one or more horizontal beams and vertical beams, which are perpendicular to each other, and enclose multiple areas to accommodate the battery cell module 102. In a specific embodiment, as shown... Figure 4 As shown, the internal frame 1012 includes three crossbeams and three longitudinal beams. Two of the crossbeams and two of the longitudinal beams are connected end-to-end to form an inner frame. The first and last ends of the third crossbeam are connected to the middle of the two longitudinal beams within the inner frame, and the first and last ends of the fourth longitudinal beam are connected to the middle of the two crossbeams within the inner frame. The internal frame 1012 encloses four areas, which can accommodate four battery cell modules 102.

[0033] The CTP battery pack of this utility model has the following beneficial effects:

[0034] This utility model provides a repairable CTP battery pack, which integrates battery cells and liquid cooling plates with mounting slots into battery cell modules, as well as cross and longitudinal beams and a battery box with corresponding mounting slots. Compared with existing CTP technology, it enables battery cell modules to be detachably installed on the battery box by area. When a battery cell fails, the faulty battery cell module can be disassembled and replaced individually, reducing maintenance costs.

[0035] It should be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," and "setup" used in the description of this application should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal connection of two components. Those skilled in the art can understand its specific meaning in this application according to the specific circumstances. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] The embodiments described above are merely further illustrations of the present invention and are not intended to limit the present invention in any other way. The present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding modifications and changes based on the present invention, but all such modifications and changes should fall within the protection scope of the present invention.

Claims

1. A CTP battery pack, characterized in that, include: Multiple battery cell modules, each battery cell module including a liquid cooling plate and a battery cell assembly, the bottom of the battery cell assembly being connected to the top of the liquid cooling plate, and the edge of the liquid cooling plate being provided with multiple first mounting grooves; The housing contains the plurality of battery cell modules, and the housing is provided with a plurality of second mounting slots, each of which corresponds to a first mounting slot. A bottom protective plate is located at the bottom of the enclosure.

2. The CTP battery pack according to claim 1, characterized in that, The edge of the liquid cooling plate is provided with a plurality of first mounting grooves at uniform intervals.

3. A CTP battery pack according to claim 1, characterized in that, The area at the bottom of the battery cell assembly is smaller than the area at the top of the liquid cooling plate, and the edge of the liquid cooling plate is the part of the liquid cooling plate not covered by the battery cell assembly.

4. A CTP battery pack according to claim 1, characterized in that, The bottom of the battery cell assembly is bonded to the top of the liquid cooling plate.

5. A CTP battery pack according to claim 4, characterized in that, The top of the liquid cooling plate is coated with thermally conductive structural adhesive, and the bottom of the battery cell assembly is connected to the top of the liquid cooling plate through the thermally conductive structural adhesive.

6. A CTP battery pack according to claim 1, characterized in that, The battery cell module is installed in the housing using a first fastener.

7. A CTP battery pack according to claim 1, characterized in that, The housing includes a frame and an inner frame. The inner frame is disposed inside the frame. The area enclosed by the frame and the inner frame accommodates the battery cell module. The second mounting slot is disposed on the frame and the inner frame.

8. A CTP battery pack according to claim 7, characterized in that, The front and rear ends of the battery cell assembly respectively abut against the internal frame.

9. A CTP battery pack according to claim 7, characterized in that, The internal frame includes one or more horizontal beams and vertical beams, which are perpendicular to each other and enclose multiple areas to accommodate the battery cell module.

10. A CTP battery pack according to claim 1, characterized in that, The first mounting slot and the second mounting slot are connected by a second fastener.

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