Power battery positive and negative electrode temperature sensor fixing device

Abstract

The utility model discloses a power battery positive and negative electrode temperature sensor fixing device, which comprises a device fixing frame capable of being fixedly connected with a battery to be detected and two sensor fixing columns which are arranged on the device fixing frame and respectively correspond to a positive electrode and a negative electrode of a power battery in position, the lower end portion of each sensor fixing column is sequentially connected with a telescopic fixing column spring and a fixing column spring pad, wherein the lower end face of the fixing column spring pad makes contact with a temperature sensor. According to the utility model, the fitting degree of the temperature sensor and the battery measurement position is effectively solved through the dual effects of the device fixing frame and the spring; the temperature sensors are fixed through the springs, uniform consistency of the positions of the temperature sensors can be guaranteed, inaccurate temperature collection data caused by falling of the temperature sensors in the testing process are avoided, the accuracy of battery temperature related testing can be greatly improved through the device, and the testing efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery positive and negative electrode temperature measurement, and in particular to a device for fixing positive and negative electrode temperature sensors of a power battery. Background Art

[0002] New energy vehicles came into being against the backdrop of the increasingly severe energy crisis and the deepening implementation of the concept of sustainable development. They are not only conducive to the transformation of the automotive industry layout, but also can ease the energy shortage situation. With the application of new energy vehicles, the research on electric vehicles continues to deepen. At this stage, batteries are the most core technology in new energy vehicles, and battery temperature is one of the key technical researches during the application process.

[0003] At present, during the charging and discharging process of power batteries, monitoring the temperature change of single cells during the charging and discharging process is one of the important parameters for measuring battery rate, cycle and other performance, and also provides important data support for the battery module BMS system. Monitoring the change of battery temperature is usually carried out using a temperature sensor, which is in contact with the battery to collect the battery temperature.

[0004] Disadvantage 1: poor consistency, relatively inconsistent placement, and temperature measurement values ​​may deviate;

[0005] Disadvantage 2: Insufficient adhesion of the insulating tape: The battery temperature will rise during the charging and discharging process. The adhesion of the insulating tape will not be strong as the temperature rises, resulting in poor adhesion between the temperature sensor and the battery, or even the temperature sensor falling off. If the temperature monitoring is low due to the falling of the temperature sensor, once the temperature of the positive and negative poles of the battery is too high, the temperature setting protection or temperature warning cannot be activated in time, which will pose a safety hazard. In addition, due to the insufficient adhesion of the insulating tape to the positive and negative poles, the battery monitoring temperature is inaccurate, and the inaccurate temperature parameters cannot objectively analyze the characteristics of a battery as well as the characteristics of the positive and negative electrode materials, diaphragms, electrolytes and other materials used. Utility Model Content

[0006] In view of the technical problems pointed out in the above background technology, the purpose of the present utility model is to provide a fixing device for positive and negative temperature sensors of a power battery.

[0007] In order to achieve the purpose of the utility model, the technical solution provided by the utility model is as follows:

[0008] A device for fixing positive and negative temperature sensors of a power battery comprises a device fixing frame that can be fixedly connected to a battery to be tested and two sensor fixing columns installed on the device fixing frame and whose positions correspond to the positive and negative positions of the power battery respectively, wherein the lower end of each of the sensor fixing columns is sequentially connected to a retractable fixing column spring and a fixing column spring pad whose lower end surface contacts the temperature sensor.

[0009] Among them, two fixing column mounting holes are arranged on the device fixing frame, and two sensor fixing columns are respectively connected to the two fixing column mounting holes, and the connection positions between the two sensor fixing columns and the fixing column mounting holes are axially adjustable.

[0010] Among them, each of the fixing column mounting holes is provided with an internal thread, and each of the sensor fixing column side circumferential surfaces is provided with an external thread. The sensor fixing columns and fixing column mounting holes at corresponding positions are threadedly connected through matching external threads and internal threads.

[0011] Wherein, the device fixing frame is an inverted U-shaped frame, the two sensor fixing columns are installed on the middle frame body of the inverted U-shaped frame, and the two side frames of the inverted U-shaped frame are fixedly connected to the battery to be tested.

[0012] Wherein, the inverted U-shaped frame is connected above the battery to be tested.

[0013] The inverted U-shaped frame includes an upper baffle, a left baffle and a right baffle. The upper ends of the left baffle and the right baffle are respectively connected to the two ends of the upper baffle, and the lower ends are respectively fixedly connected to the two sides of the battery to be tested.

[0014] Among them, the two ends of the upper baffle are respectively provided with an upper baffle left mounting hole and an upper baffle right mounting hole, and are connected to the left baffle and the right baffle through insulating baffle connecting bolts that pass through the upper baffle left mounting hole and the upper baffle right mounting hole respectively, thereby realizing the connection between the upper baffle and the left baffle and the right baffle respectively.

[0015] The left baffle and the right baffle have different colors.

[0016] The left baffle and the right baffle are respectively tightened or adsorbed on two sides of the battery to be tested by insulating baffle fixing bolts.

[0017] Wherein, the device fixing frame is made of polytetrafluoroethylene.

[0018] Compared with the prior art, the utility model provides a device for fixing the positive and negative temperature sensors of a power battery, which effectively solves the problem of the fit between the temperature sensor and the battery measurement position through the dual effects of the device fixing frame and the spring; and by fixing the temperature sensor with the spring, the position of the temperature sensor can be guaranteed to be uniform and consistent, thus avoiding the temperature sensor from falling off during the test and causing inaccurate temperature collection data. The device can greatly improve the accuracy of battery temperature-related tests and greatly improve the test efficiency.

[0019] In addition, the upper baffle and the two side baffles are made of polytetrafluoroethylene, which can prevent the battery from being tested safely and effectively under high rates and high environments, and has an insulating protection effect on the battery during the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the overall structure of the fixing device provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of the exploded structure of the fixing device provided in an embodiment of the present application;

[0022] In the figure, baffle fixing bolt 1, right baffle 2, upper baffle right side mounting hole 3, fixing column mounting hole 4, upper baffle 5, upper baffle left side mounting hole 6, left baffle 7, sensor fixing column 8, fixing column spring 9, fixing column spring pad 10. DETAILED DESCRIPTION

[0023] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] like Figure 1 and Figure 2 The structure of the embodiment of the present application is shown.

[0025] Example 1

[0026] The present embodiment provides a device for fixing the positive and negative temperature sensors of a power battery, comprising a device fixing frame that can be fixedly connected to a battery to be tested, and two sensor fixing columns 8 installed on the device fixing frame and whose positions correspond to the positive and negative positions of the power battery, respectively, wherein the lower end of each of the sensor fixing columns 8 is sequentially connected to a retractable fixing column spring 9 and a fixing column spring pad 10 whose lower end surface contacts the temperature sensor.

[0027] It should be noted that the fixed column spring 9 can be used to accurately locate the measured temperature position distance and lock it to ensure the consistency and reliability of the position during the test; the fixed column spring pad is provided to fit tightly with the temperature sensor to ensure the accuracy of the temperature collection data during the test.

[0028] Before measurement, the temperature sensor is assembled first, and the temperature sensor is accurately fixed and locked by fixing the column spring 9 and the column spring pad 10 to ensure the consistency of the battery temperature sensor in the test position and the accuracy of the test temperature.

[0029] Example 2

[0030] This embodiment provides an adjustable sensor fixing column 8 installation structure, wherein two fixing column installation holes 4 are provided on the device fixing frame, and the two sensor fixing columns 8 are respectively connected to the two fixing column installation holes 4 and the connection positions between the sensor fixing columns 8 and the fixing column installation holes 4 are axially adjustable.

[0031] During measurement, the sensor fixing column 8 is inserted into the fixing column mounting hole 4, and the distance between the sensor fixing column 8 and the measured temperature position is adjusted to ensure that the fixing column spring pad 10 is tightly fitted to the temperature sensor.

[0032] Example 3

[0033] This embodiment also provides an adjustable sensor fixing column 8 installation structure, each of the fixing column installation holes 4 is provided with an internal thread, and each of the sensor fixing column 8 is provided with an external thread on the side circumferential surface, and the sensor fixing column 8 and the fixing column installation hole 4 at the corresponding position are threadedly connected by matching external threads and internal threads.

[0034] During measurement, the distance between the sensor fixing post and the measured temperature position is adjusted by rotating the thread on the sensor fixing post.

[0035] Example 4

[0036] This embodiment provides a specific structure of a device fixing frame, which is an inverted U-shaped frame. The two sensor fixing columns 8 are installed on the middle frame of the inverted U-shaped frame, and the two side frames of the inverted U-shaped frame are fixedly connected to the battery to be tested.

[0037] In addition, the inverted U-shaped frame is connected above the battery to be tested to form an insulating upper cover to prevent short circuit during the battery test.

[0038] Specifically, the inverted U-shaped frame includes an upper baffle 5, a left baffle 7 and a right baffle 2. The upper ends of the left baffle 7 and the right baffle 2 are respectively connected to the two ends of the upper baffle 5, and the lower ends are respectively fixedly connected to the two sides of the battery to be tested.

[0039] Specifically, the two ends of the upper baffle 5 are respectively provided with an upper baffle left side mounting hole 6 and an upper baffle right side mounting hole 3, which are connected to the left baffle 7 and the right baffle 2 through insulating baffle connecting bolts that pass through the upper baffle left side mounting hole 6 and the upper baffle right side mounting hole 3, respectively, to realize the connection between the upper baffle 5 and the left baffle 7 and the right baffle 2, respectively.

[0040] Specifically, the left baffle plate 7 and the right baffle plate 2 are respectively pressed or adsorbed on two sides of the battery to be tested by insulating baffle plate fixing bolts 1 .

[0041] It should be noted that the baffle fixing bolt 1 adopts an insulated suction cup bolt, which is mainly composed of a screw, a buffer rod, an adapter, a locking ring and a suction cup, and they are installed together in sequence to form a fixing bolt on the baffle. The thread mouth in the screw is deep, the thread is sharp, the force is evenly distributed, and it is not easy to slip during its rotation. The suction cup is tightly adsorbed on the battery. This method is fixed on both sides of the baffle, which can position the battery, provide a precise fixing device position, and prevent the fixing device from loosening.

[0042] It should be noted that the insulating suction cup bolt adopts the structure in the prior art.

[0043] Preferably, the left baffle and the right baffle use different colors to facilitate differentiation during installation, while providing effective measures for safety issues such as reverse charging of batteries.

[0044] Example 5

[0045] The device fixing frame provided in this embodiment is made of polytetrafluoroethylene material, which has good insulation, high temperature resistance, corrosion resistance and other characteristics. For example, the device fixing frame is composed of an upper baffle, a left baffle and a right baffle made of polytetrafluoroethylene.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate and explain the present invention, and are not intended to limit the present invention to the scope of the described embodiments. In addition, those skilled in the art can understand that the present invention is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of protection claimed by the present invention.

Claims

1. A device for fixing positive and negative temperature sensors of a power battery, characterized in that: The invention comprises a device fixing frame capable of being fixedly connected to a battery to be tested, and two sensor fixing columns (8) mounted on the device fixing frame and respectively corresponding to the positions of the positive and negative electrodes of the power battery, wherein the lower end of each of the sensor fixing columns (8) is sequentially connected to a retractable fixing column spring (9) and a fixing column spring pad (10) whose lower end surface contacts a temperature sensor.

2. A power battery positive and negative electrode temperature sensor fixing device according to claim 1, characterized in that: Two fixing column mounting holes (4) are arranged on the device fixing frame, and two sensor fixing columns (8) are respectively connected to the two fixing column mounting holes (4), and the connection positions between the two sensor fixing columns and the fixing column mounting holes (4) are axially adjustable.

3. A power battery positive and negative electrode temperature sensor fixing device according to claim 2, characterized in that: Each of the fixing column mounting holes (4) is provided with an internal thread, and each of the sensor fixing columns (8) is provided with an external thread on its side circumferential surface. The sensor fixing columns (8) and the fixing column mounting holes (4) at corresponding positions are threadedly connected via matching external threads and internal threads.

4. A device for fixing positive and negative temperature sensors of a power battery according to any one of claims 1 to 3, characterized in that: The device fixing frame is an inverted U-shaped frame, the two sensor fixing columns (8) are installed on the middle frame body of the inverted U-shaped frame, and the two side frames of the inverted U-shaped frame are fixedly connected to the battery to be tested.

5. A power battery positive and negative electrode temperature sensor fixing device according to claim 4, characterized in that: The inverted U-shaped frame is connected above the battery to be tested.

6. A power battery positive and negative electrode temperature sensor fixing device according to claim 5, characterized in that: The inverted U-shaped frame comprises an upper baffle (5), a left baffle (7) and a right baffle (2); the upper ends of the left baffle (7) and the right baffle (2) are respectively connected to the two ends of the upper baffle (5), and the lower ends are respectively fixedly connected to the two sides of the battery to be tested.

7. A power battery positive and negative electrode temperature sensor fixing device according to claim 6, characterized in that: The upper baffle (5) is provided with an upper baffle left mounting hole (6) and an upper baffle right mounting hole (3) at both ends, respectively, and is connected to the left baffle (7) and the right baffle (2) through insulating baffle connecting bolts passing through the upper baffle left mounting hole (6) and the upper baffle right mounting hole (3), respectively, so as to realize the connection between the upper baffle (5) and the left baffle (7) and the right baffle (2) respectively.

8. A power battery positive and negative electrode temperature sensor fixing device according to claim 6, characterized in that: The left baffle (7) and the right baffle (2) have different colors.

9. A power battery positive and negative electrode temperature sensor fixing device according to claim 6, characterized in that: The left baffle (7) and the right baffle (2) are respectively pressed or adsorbed on two sides of the battery to be tested via insulating baffle fixing bolts (1).

10. A power battery positive and negative electrode temperature sensor fixing device according to claim 1, characterized in that: The device fixing frame is made of polytetrafluoroethylene.

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