CCS assembly capable of avoiding error temperature measurement and battery module

Abstract

The utility model discloses a CCS assembly capable of avoiding error temperature measurement and a battery module. The CCS assembly is provided with an acquisition module, and heat generated by the acquisition module cannot be transmitted to a temperature-sensitive element. According to the CCS assembly capable of avoiding mistaken temperature measurement, the flexible circuit board comprises a horizontally-arranged body part and a structure arrangement part with the front end bent downwards, the body part is installed on the insulation carrier, the busbars are installed on the insulation carrier, the busbars are arranged on the left side and the right side of the body part respectively, and the temperature-sensitive elements are arranged in the structure arrangement part. The busbar is suitable for being electrically connected with the battery cell group, the busbar is electrically connected with the body part, the temperature-sensitive element is mounted on the body part and is electrically connected with the body part, and the structure arrangement part integrally deviates downwards out of the insulating carrier and is provided with an acquisition module for acquiring at least one of voltage, current and temperature of the battery cells.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a CCS assembly and battery module for avoiding false temperature measurement. Background Technology

[0002] CCS (Cell Connection System), also known as a battery cover assembly, is used in electric vehicles (EVs). Existing CCSs include a data acquisition module that collects information such as voltage, current, and temperature of the battery cells, achieving intelligence and weight reduction. However, the acquisition module generates heat during operation, which is easily transferred to nearby temperature-sensitive elements. The temperature sensed by these elements does not reflect the actual operating performance of the battery cell, leading to detection errors. Furthermore, the acquisition module is located above the battery cells, and its position precludes the installation of explosion-proof valves, affecting their placement. Therefore, it is necessary to develop a CCS assembly and battery module with an acquisition module whose heat generation does not transfer to the temperature-sensitive elements. Utility Model Content

[0003] The purpose of this invention is to provide a CCS assembly with a data acquisition module in which the heat generated by the data acquisition module is not transferred to the temperature-sensitive element.

[0004] Another objective of this invention is to provide a battery module comprising a CCS assembly having a data acquisition module whose heat generation is not transferred to a temperature-sensitive element.

[0005] To achieve the above objectives, the CCS assembly for avoiding false temperature measurement of this utility model is suitable for installation in a battery cell assembly. The battery cell assembly includes multiple phase-connected battery cells. The CCS assembly for avoiding false temperature measurement includes an insulating carrier, a flexible circuit board, multiple busbars, and multiple temperature-sensitive elements. The flexible circuit board includes a horizontally arranged body and a structural arrangement part with its front end bent downwards. The body is installed on the insulating carrier, and the busbars are installed on the insulating carrier. The multiple busbars are located on the left and right sides of the body and are suitable for electrical connection with the battery cell assembly. The busbars are electrically connected to the body. The temperature-sensitive elements are installed on the body and electrically connected to the body. The structural arrangement part is offset downwards from the insulating carrier and is provided with a data acquisition module for collecting at least one of the voltage, current, and temperature of the battery cells.

[0006] Preferably, the front end of the flexible circuit board is bent downward at 90° to form the structural arrangement section.

[0007] Preferably, the acquisition module includes an AFE chip.

[0008] Preferably, the busbar is electrically connected to the main body via a metal connector.

[0009] Preferably, multiple connecting structures are formed on the left and right sides of the main body, arranged in the front-back direction. One end of the metal connecting piece is installed on the busbar and the other end is installed on the connecting structure. The temperature-sensitive element is installed on the connecting structure. The metal connecting piece has an air-proof window, and the temperature-sensitive element is located in the air-proof window.

[0010] Preferably, a joining structure is provided between the connecting structure and the main body. The joining structure keeps the connecting structure in the same structural form. After the joining structure is broken, the connecting structure forms a variable structure. When the connecting structure becomes a variable structure, it can be elongated and / or oscillated.

[0011] Preferably, the connecting structure is a bent structure that is on the same structural plane as the main body.

[0012] Preferably, the main body and the insulating carrier have multiple mounting holes extending along the front-to-back direction for installing explosion-proof valves.

[0013] Preferably, the top of the insulating carrier is provided with a mounting groove, the bottom of the mounting groove is provided with a through hole extending from top to bottom, the mounting groove is also provided with a pin, and the busbar is provided in the mounting groove and inserted into the pin.

[0014] To achieve the second objective mentioned above, this utility model provides a battery module, which includes a cell assembly and the aforementioned CCS assembly for preventing false temperature measurement, wherein the CCS assembly for preventing false temperature measurement is mounted on top of the cell assembly.

[0015] Compared with existing technologies, in this invention, the main body is electrically connected to each busbar, the busbars are electrically connected to the battery cells, and the main body is also electrically connected to each temperature-sensitive element. A data acquisition module is installed on the structural arrangement section, forming a data acquisition circuit. Therefore, the voltage, current, and temperature of each battery cell during operation can be directly acquired without the need for a separate BMS module for control, thus optimizing the structural form. When the acquisition module operates, heat is inevitably generated. The front end of the flexible circuit board of this invention is bent downwards, forming the structural arrangement section there. This structural arrangement section is offset downwards from the insulating carrier and is far from the temperature-sensitive elements. The heat generated by the acquisition module during operation will not and cannot be transferred to the temperature-sensitive elements, allowing the temperature-sensitive elements to directly reflect the true temperature of the battery cell during operation. Attached Figure Description

[0016] Figure 1 This is a perspective view of the CCS assembly of this utility model that avoids false temperature measurement.

[0017] Figure 2 This is an exploded perspective view of the CCS assembly for avoiding false temperature readings according to this utility model.

[0018] Figure 3 This is a perspective view of the battery module of this utility model. Detailed Implementation

[0019] To explain the technical content and structural features of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0020] like Figure 3 As shown, this utility model provides a battery module 1000, which includes a CCS assembly 100 to avoid false temperature measurement and a cell assembly 200. The CCS assembly 100 is mounted on top of the cell assembly 200. The cell assembly 200 consists of multiple cells connected in series or parallel, and is generally square in shape, but not limited thereto. This utility model mainly improves the structure of the CCS assembly 100 to avoid false temperature measurement, which will be described in detail below. For ease of description, it will be referred to as the CCS assembly 100.

[0021] like Figure 1 , Figure 2 and Figure 3 As shown, the CCS assembly 100 of this invention is suitable for installation in the cell assembly 200. The CCS assembly 100 is electrically connected to the cell assembly 200, which includes multiple cells connected in phase to form a high-voltage, high-capacity battery system. Preferably, the cell assembly 200 provided by this invention has a large capacity and belongs to industrial and commercial energy storage power supplies; however, the cell assembly 200 can also be configured with a standard capacity structure.

[0022] The CCS assembly 100 of this invention includes an insulating carrier 10, a flexible circuit board 20, multiple busbars 30, and multiple temperature-sensitive elements 40. The insulating carrier 10 is mounted on the battery cell assembly 200 to achieve integrated mounting between the insulating carrier 10 and the battery cell assembly 200. The flexible circuit board 20 includes a horizontally arranged body portion 21 and a structural arrangement portion 22 with its front end bent downwards. The body portion 21 is mounted on the insulating carrier 10, and the busbars 30 are mounted on the insulating carrier 10. Multiple busbars 30 are distributed on the left and right sides of the body portion 21, and the busbars 30 are adapted to be electrically connected to the battery cell assembly 200. The electrical connection between the busbars 30 and the body portion 21 achieves the electrical connection between the flexible circuit board 20 and the battery cell assembly 200. The temperature-sensitive elements 40 are mounted on and electrically connected to the body portion 21, and are used to sense the temperature of the battery cell during operation. The structural arrangement section 22 is offset downward from the insulating carrier 10, and the structural arrangement section 22 is provided with a data acquisition module 23 for acquiring at least one of the voltage, current and temperature of the battery cell.

[0023] In this invention, the main body 21 is electrically connected to each busbar 30, and the busbar 30 is electrically connected to the battery cell. The main body 21 is also electrically connected to each temperature-sensitive element 40. A data acquisition module 23 is provided on the structural arrangement part 22, forming a data acquisition circuit. Therefore, the voltage, current, and temperature of each battery cell during operation can be directly acquired without the need for a separate BMS module to control the acquisition, thus optimizing the structural form. When the data acquisition module 23 is running, heat is inevitably generated. The front end of the flexible circuit board 20 of this invention is bent downwards to form the structural arrangement part 22, which is offset downwards from the insulating carrier 10 and away from each temperature-sensitive element 40. The heat generated by the data acquisition module 23 during operation will not and cannot be transferred to the temperature-sensitive elements 40, allowing the temperature-sensitive elements 40 to directly reflect the true temperature of the battery cell during operation.

[0024] Preferably, the insulating carrier 10 is made of plastic or rubber, formed by injection molding, and has excellent insulation performance. Furthermore, the CCS assembly 100 of this invention needs to be connected to the BMS for intelligent management and maintenance of each battery cell, preventing overcharging and over-discharging, extending the battery cell's lifespan, and monitoring its status. The structure of the BMS is well known to those skilled in the art and will not be described further here. It is worth noting that the BMS does not require an additional module for collecting the battery cell's voltage, current, and temperature, as these functions are already implemented by the acquisition module 23. The busbar 30, also known as an aluminum bus, is generally sheet-shaped, but not limited to this. The flexible circuit board 20, also known as an FPC (Flexible Printed Circuit Board), is made of a soft material, is easily bent, and readily forms the structural arrangement section 22.

[0025] like Figure 3 As shown, more specifically, the front end of the flexible circuit board 20 is bent downwards at 90° to form a structural arrangement portion 22. At this time, the structural arrangement portion 22 can be closely attached to the side of the battery cell assembly 200, avoiding occupying too much space externally and facilitating structural arrangement. The acquisition module 23 is located on the outer side of the structural arrangement portion 22, that is, the side facing away from the battery cell assembly 200.

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, the acquisition module 23 of this utility model includes an AFE chip 231 (Analog Front End), which serves as a unit for data signal sampling and processing in the battery cell assembly 200. It acquires data signals such as voltage, current and temperature of the battery cell through its own sampling channel. In this utility model, the AFE chip 231 is placed in the structural arrangement part 22 instead of in the BMS, thus optimizing the sampling channel and structural arrangement.

[0027] like Figure 1 , Figure 2 and Figure 3 The busbar 30 is electrically connected to the main body 21 via a metal connecting piece 50. Preferably, the metal connecting piece 50 is a nickel sheet, but it is not limited to this.

[0028] like Figure 1 , Figure 2 and Figure 3 Multiple connecting structures 24 arranged in the front-to-back direction are formed on the left and right sides of the main body 21. One end of the metal connecting piece 50 is installed on the busbar 30 and the other end is installed on the connecting structure 24. The temperature-sensitive element 40 is installed on the connecting structure 24. The metal connecting piece 50 has a clearance window 51, and the temperature-sensitive element 40 is located in the clearance window 51. Preferably, the clearance window 51 is a through-hole structure, roughly square, but it can be set to a circular or other form according to actual needs. The temperature-sensitive element 40 is small in size, and it is convenient to arrange it in the connecting structure 24. The temperature-sensitive element 40 can be a thermistor (specifically an NTC thermistor, but not limited to this). The temperature-sensitive element 40 is electrically connected to the AFE chip 231 to realize the acquisition of cell temperature information.

[0029] Furthermore, a joining structure 25 is provided between the connecting structure 24 and the main body. The joining structure 25 maintains the same structural form for the connecting structure 24. After the joining structure 25 is broken, the connecting structure 24 forms a variable-form structure, which can extend and swing when it becomes a variable-form structure. Before the joining structure 25 is broken, it connects the connecting structure 24 to the flexible circuit board 20, ensuring good integrity and preventing the connecting structure 24 from swinging arbitrarily. Due to processing and installation errors, some connecting structures 24 may not be accurately aligned with the busbar 30. In this case, the joining structure 25 can be broken, allowing the connecting structure 24 to change different forms, thereby adjusting its orientation and facilitating the welding of the metal connecting piece 50, thus eliminating the influence of errors. When the connecting structure 24 forms a variable form, it can extend and swing to facilitate orientation adjustment. Preferably, to facilitate breaking the joining structure 25, it can be designed as a thin structure, such as a strip. The connecting structure 24 is a bent structure on the same structural plane as the main body 21, with good overall flatness, forming a sheet-like whole. It is less prone to deformation, hooking, or tearing during subsequent surface treatment and anti-oxidation film processes, facilitating processing. In the embodiments provided by this utility model, the connecting structure 24 is generally "S" or "5" shaped, but is not limited to these. To facilitate welding, the end of the connecting structure 24 connected to the main body 21 is widened. The metal connecting piece 50 and the connecting structure 24 are connected by laser welding or ultrasonic welding, but are not limited to these methods.

[0030] like Figure 1 , Figure 2 and Figure 3 The top of the insulating carrier 10 is provided with a mounting groove 11, and the bottom of the mounting groove 11 is provided with a through hole 12 that runs vertically through the groove. The mounting groove 11 is also provided with a pin 13. The busbar 30 is located in the mounting groove 11 and inserted into the pin 13. The pin 13 positions the busbar 30. The top of the battery cell contacts the busbar 30 through the through hole 12 to achieve electrical connection between the two.

[0031] like Figure 1 , Figure 2 and Figure 3 The main body 21 and the insulating carrier 10 have multiple mounting holes 01 extending along the front-to-back direction for installing the explosion-proof valve. Since the structural arrangement part 22 is offset below the insulating carrier 10 and the main body 21 is located above the insulating carrier 10, the arrangement of the acquisition module 23 on the structural arrangement part 22 will not affect the setting of the mounting holes 01, and therefore will not affect the normal installation arrangement of the explosion-proof valve.

[0032] Figure 1 and Figure 3 In the diagram, arrow X points from left to right, arrow Y points from front to back, and arrow Z points from top to bottom.

[0033] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall fall within the scope of the present utility model.

Claims

1. A CCS assembly for avoiding misreading temperature, adapted to be installed in a battery cell group, the battery cell group comprising a plurality of battery cells connected in series, characterized in that, The CCS assembly for avoiding false temperature measurement comprises an insulating carrier, a flexible circuit board, a plurality of busbars and a plurality of temperature-sensitive elements, the flexible circuit board comprises a body part arranged horizontally and a structure arrangement part bent downward at the front end, the body part is mounted on the insulating carrier, the busbars are mounted on the insulating carrier, a plurality of the busbars are arranged on the left and right sides of the body part, the busbars are adapted to be electrically connected with the battery cell group, the busbars are electrically connected with the body part, the temperature-sensitive elements are mounted on and electrically connected with the body part, the structure arrangement part is overall offset downward from the insulating carrier, and the structure arrangement part is provided with a collection module for collecting at least one of voltage, current and temperature of the battery cell.

2. The CCS assembly to avoid misreading temperature of claim 1, wherein, The front end of the flexible circuit board is bent downward by 90° to form the structure arrangement part.

3. The CCS assembly to avoid misreading temperature of claim 1, wherein, The collection module comprises an AFE chip.

4. The CCS assembly to avoid misreading temperature of claim 1, wherein, The busbars are electrically connected with the body part through metal connecting pieces.

5. The CCS assembly to avoid misreading temperature of claim 4, wherein, A plurality of connecting structures arranged in the front-rear direction are formed on the left and right sides of the body part, one end of the metal connecting piece is mounted on the busbar and the other end is mounted on the connecting structure, the temperature-sensitive elements are mounted on the connecting structure, the metal connecting piece is provided with an empty window, and the temperature-sensitive elements are arranged in the empty window.

6. The CCS assembly to avoid misreading temperature of claim 5, wherein, A joint structure is arranged between the connecting structure and the body part, the joint structure keeps the connecting structure in the same structure form, the connecting structure forms a variable structure after being broken at the joint structure, and the connecting structure can be elongated and / or swung when it becomes the variable structure.

7. The CCS assembly to avoid misreading temperature of claim 5, wherein, The connecting structure is a bending structure in the same structure plane as the body part.

8. The CCS assembly to avoid misreading temperature of claim 1, wherein, A plurality of mounting through holes for mounting explosion-proof valves are arranged on the body part and the insulating carrier in the front-rear direction.

9. The CCS assembly to avoid misreading temperature of claim 1, wherein, A mounting groove is arranged on the top of the insulating carrier, an interfacing through hole is arranged in the groove bottom of the mounting groove in the up-down direction, the mounting groove is further provided with a latch, and the busbars are arranged in the mounting groove and inserted into the latch.

10. A battery module, characterized by The CCS assembly for avoiding false temperature measurement is mounted on the top of the battery cell group.

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