CN202495555U - A temperature and voltage detection device for a battery pack - Google Patents

Abstract

The utility model belongs to the technical field of the detection equipment, especially, relate to a temperature and voltage detection device for group battery, detect the line including temperature sensor and voltage, temperature sensor includes head and the arm that links to each other with the head, the voltage detects the main part that the line includes foraminiferous terminal and is connected with foraminiferous terminal, the equal fixed connection of temperature sensor and voltage detection line is on the electric core connecting piece of group battery. Compared with the prior art, the utility model discloses a concentrate temperature sensor and voltage and detect the line and fix on electric core connection piece to temperature and voltage on the accurate electric core connection piece of surveying have overcome among the prior art and have connected insecurely, and the voltage detects the line and easily twists reverse shortcoming such as bad, and the structure is firm, and the position uniformity is good moreover, and compact structure has avoided the harmful effects of human factor.

Description

A temperature and voltage detection device for a battery pack

technical field

The utility model belongs to the technical field of detection equipment, in particular to a temperature and voltage detection device for a battery pack.

Background technique

Due to the increasingly severe environmental and resource problems, new energy vehicles have become the mainstream direction of the future development of the automotive industry. Power battery packs, as the main source of power for new energy vehicles, have also become the core components and key technologies of electric vehicles.

The temperature of the battery cells in the power battery pack rises rapidly during the working process, especially in the case of high-current discharge. The place where the temperature rises the fastest is often the surface of the cell connection piece. In order to transmit real and accurate data to the BMS (battery management system) to monitor the battery, a temperature sensor and a voltage frame line are generally used to detect the temperature on the surface of the cell. and cell voltage.

As shown in FIG. 1 , the current fixing method of the temperature sensor is generally to glue the temperature sensor 20 on the surface of the battery cell 30 with glue. This method is relatively high in human factors, and often has the problem of weak bonding. In the case of relatively large vibration, loosening and failure will occur, and the layout position is not standardized, the position consistency is poor, and the temperature of the surface of the battery cell 30 will lag behind. The temperature on the cell connecting sheet cannot truly reflect the highest temperature in the battery pack, which is not convenient for the thermal management of the battery. In addition, the glue also has heat transfer aging and unreliable heat transfer, which is not conducive to temperature detection.

As shown in FIG. 1 , the current fixing method of the voltage detection line is to directly fix the voltage detection line 40 on the pole 10 of the battery. Since the torque of the bolts on the battery pole 10 is usually in the range of 6-8Nm, the voltage detection line 40 will often rotate or even be damaged.

In view of this, it is indeed necessary to provide a device that can accurately detect the temperature and voltage of the battery core, has a firm structure, and has a good location consistency.

Utility model content

The purpose of the utility model is to provide a device that can accurately detect the temperature and voltage of the battery core and has a firm structure and a good position consistency in view of the deficiencies of the prior art.

In order to achieve the above object, the utility model adopts the following technical solutions:

A temperature and voltage detection device for a battery pack, comprising a temperature sensor and a voltage detection line, the temperature sensor includes a head and an arm connected to the head, the voltage detection line includes a terminal with a hole and a The main body of the terminal connection, the temperature sensor and the voltage detection line are all fixedly connected to the cell connecting sheet of the battery pack.

As an improvement of the temperature and voltage detection device for the battery pack of the present invention, the device includes a spring pressing piece, an elastic arm is arranged on the spring pressing piece, the head of the temperature sensor is fixed under the elastic arm, The thermistor located at the head of the temperature sensor can be closely attached to the cell connecting sheet to accurately detect the temperature on the surface of the cell connecting sheet, and the voltage detection line is pressed on one side of the spring pressing sheet.

As an improvement of the temperature and voltage detection device for the battery pack of the utility model, the spring pressing piece further includes a positioning piece, and positioning holes for positioning are provided at both ends of the positioning piece.

As an improvement of the temperature and voltage detection device for the battery pack of the utility model, the terminal with a hole for voltage detection is fixedly connected in the positioning hole by screws.

As an improvement of the temperature and voltage detection device for the battery pack of the present invention, the positioning sheet is also provided with a groove for fixing the arm of the temperature sensor, and the groove is located between the positioning holes.

As an improvement of the temperature and voltage detection device for the battery pack of the utility model, the positioning piece and the elastic arm are connected through a connecting piece.

As an improvement of the temperature and voltage detection device for the battery pack of the present invention, the shape of the elastic arm matches the shape of the head of the temperature sensor.

As an improvement of the temperature and voltage detection device for the battery pack of the present invention, the shape of the groove matches the shape of the arm of the temperature sensor. Above, the temperature sensor and the voltage detection line are concentrated and fixed under the spring pressing piece, the operation is simple, the structure is reliable, and the temperature and voltage on the battery connection piece can be accurately detected, which is beneficial to battery management.

As an improvement of the temperature and voltage detection device for the battery pack of the utility model, the cell connection sheet is provided with a mounting hole for fixing the cell connection sheet on the surface of the cell.

As an improvement of the temperature and voltage detection device for the battery pack of the present invention, the head of the temperature sensor is fixed in the hole of the hole terminal of the voltage detection line by bonding, and the voltage detection line is fixed by screws in the threaded hole. This solution fixes the temperature sensor and the voltage detection line on the cell connecting sheet together by a simple bonding method, which is simple to operate, has a reliable structure, and can accurately detect the temperature and voltage on the cell connecting sheet, which is beneficial to battery management.

This temperature and voltage detection device is suitable for all car battery packs, electric motorcycle battery packs, UPS energy storage battery packs and backup emergency power battery packs.

Compared with the prior art, the utility model fixes the temperature sensor and the voltage detection line on the cell connecting sheet to accurately detect the temperature and voltage on the cell connecting sheet, and overcomes the unreliable connection and the voltage detection in the prior art. The measurement line is easy to twist and other shortcomings, the structure is firm, and the position consistency is good, the structure is compact, and the adverse effects of human factors are avoided.

Description of drawings

Fig. 1 is the temperature and voltage detection device installed on the battery pack in the prior art;

Fig. 2 is the explosion schematic diagram of embodiment 1 of the utility model;

Fig. 3 is the schematic diagram of the assembly of Embodiment 1 of the present utility model;

Fig. 4 is the schematic structural view of the spring pressing sheet in Embodiment 1 of the utility model;

Fig. 5 is the explosion schematic diagram of embodiment 2 of the utility model;

Fig. 6 is a schematic diagram of assembly of Embodiment 2 of the present utility model.

Detailed ways

Below in conjunction with specific embodiment and accompanying drawing, the beneficial effect of the present utility model is further described:

Specific implementation mode 1

As shown in Figure 2, Figure 3 and Figure 4, a temperature and voltage detection device for a battery pack includes a temperature sensor 1 and a voltage detection line 2, and the temperature sensor 1 includes a head 11 and a wire connected to the head 11 The arm part 12, the voltage detection line 2 includes a terminal with a hole 21 and a main body 22 connected to the terminal with a hole, the temperature sensor 1 and the voltage detection line 2 are fixedly connected to the cell connecting sheet 3 of the battery pack .

Wherein, the device includes a spring pressing piece 4, an elastic arm 41 is arranged on the spring pressing piece 4, the head 11 of the temperature sensor 1 is fixed under the elastic arm 41, and the voltage detection line 2 is pressed It is arranged on one side of the spring pressing piece 4 .

The spring pressing piece 4 also includes a positioning piece 42, and two ends of the positioning piece 42 are provided with positioning holes 43 for positioning.

The terminal with a hole 21 of the voltage detection 2 is fixedly connected in the positioning hole 42 through the screw 5 .

The positioning piece 42 is further provided with a groove 44 for fixing the arm portion 12 of the temperature sensor 1 , and the groove 44 is located between the positioning holes 42 .

The positioning piece 42 is connected to the elastic arm 41 through a connecting piece 45 .

The shape of the elastic arm 41 matches the shape of the head 11 of the temperature sensor 1 .

The shape of the groove 44 matches the shape of the arm portion 12 of the temperature sensor 1 .

The cell connection sheet 3 is provided with a mounting hole 31 for fixing the cell connection sheet 3 on the surface of the cell.

The temperature sensor 1 is fixed in the hole of the hole terminal 21 of the voltage detection line 2 by bonding.

When installing, first prepare the corresponding parts: cell connection piece 3, spring pressure piece 4, voltage detection line 2 and screw 5 for fixing. Wherein, an internal thread hole is firstly processed on the cell connection piece 3 .

Then the head 11 (thermistor) of the temperature sensor 1 is placed under the elastic arm 41 of the spring pressing piece 4, the arm portion 12 of the temperature sensor 1 is placed in the groove 44, and the terminal with a hole of the voltage detection line 2 21 is placed under one of the positioning holes 42 of the spring pressure piece 4, and the positioning hole 42 is fixed on the cell connecting piece 3 with the screw 5, and the other positioning hole 42 is also fixed with the screw 5, and the two screws 5 are screwed to the specified The torsion force is enough to complete the assembly of the temperature and voltage detection device. Then the assembled temperature and voltage detection device is installed on the surface of the battery cell through the mounting screws installed in the mounting hole 31 .

Specific implementation mode 2

As shown in Figures 5 and 6, a temperature and voltage detection device for a battery pack includes a temperature sensor 1 and a voltage detection line 2, the temperature sensor 1 includes a head 11 and an arm 12 connected to the head 11, The voltage detection line 2 includes a terminal with a hole 21 and a main body 22 connected to the terminal with a hole, and the temperature sensor 1 and the voltage detection line 2 are both fixedly connected to the cell connection sheet 3 of the battery pack.

The head 11 of the temperature sensor 1 is fixed in the hole 21 of the hole terminal of the voltage detection line 2 by bonding, and the voltage detection line 2 is fixed in the threaded hole by the screw 5 .

When installing, first fix the head 11 of the temperature sensor 1 in the hole of the terminal with a hole 21 with glue, and then use the terminal with a hole 21 on the voltage detection line 2 to fix it to the battery cell with the screw 5 after it is solidified In the threaded hole 32 on the connecting piece 3, the assembly of the temperature and voltage detection device is completed. Then the assembled temperature and voltage detection device is installed on the surface of the battery cell through the mounting screws installed in the mounting hole 31 .

According to the disclosure and introduction of the above specification, those skilled in the art to which the present utility model belongs can also make appropriate changes and modifications to the above embodiment. Therefore, the utility model is not limited to the specific implementation manners disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model.

Claims (10)

1. A temperature and voltage detection device for a battery pack, comprising a temperature sensor and a voltage detection line, the temperature sensor comprising a head and an arm connected to the head, the voltage detection line comprising a terminal with a hole and an arm connected to the head The main body connected by the hole terminal is characterized in that: the temperature sensor and the voltage detection line are both fixedly connected to the cell connecting sheet of the battery pack. 2. The temperature and voltage detection device for a battery pack according to claim 1, characterized in that: the device comprises a spring pressing piece, the spring pressing piece is provided with an elastic arm, and the head of the temperature sensor is fixed on the Under the elastic arm, the voltage detection line is pressed on one side of the spring pressing piece. 3 . The temperature and voltage detection device for a battery pack according to claim 2 , wherein the spring pressing piece further includes a positioning piece, and two ends of the positioning piece are provided with positioning holes for positioning. 4 . 4 . The temperature and voltage detection device for a battery pack according to claim 3 , wherein the terminal with a hole for voltage detection is fixedly connected to the positioning hole by screws. 5. The temperature and voltage detection device for a battery pack according to claim 3, characterized in that: said positioning piece is also provided with a groove for fixing the arm of the temperature sensor, said groove is located between said positioning hole between. 6 . The temperature and voltage detection device for a battery pack according to claim 3 , wherein the positioning piece is connected to the elastic arm through a connecting piece. 7 . 7. The temperature and voltage detection device for a battery pack according to claim 2, wherein the shape of the elastic arm matches the shape of the head of the temperature sensor. 8. The temperature and voltage detecting device for a battery pack according to claim 5, wherein the shape of the groove matches the shape of the arm of the temperature sensor. 9 . The temperature and voltage detecting device for a battery pack according to claim 1 , characterized in that: the cell connecting piece is provided with a mounting hole. 10 . 10. The temperature and voltage detection device for a battery pack according to claim 1, characterized in that: the head of the temperature sensor is fixed in the hole of the hole terminal of the voltage detection line by bonding, and the voltage detection line The measuring line is fixed in the threaded hole by screws.

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