Battery voltage and temperature acquisition board of electric formula car

Abstract

The utility model relates to a battery voltage and temperature acquisition board of an electric formula car. The battery voltage and temperature acquisition board comprises a circuit board; the plurality of voltage acquisition circuits are used for acquiring voltage data of the battery cells; the plurality of temperature acquisition circuits are used for acquiring temperature data of the battery cells; the connector is integrally arranged on the circuit board and is used for being connected with an external data acquisition system; wherein each voltage acquisition circuit and each temperature acquisition circuit are integrated on a circuit board; the connector comprises a plurality of connecting ends, and a part of the connecting ends are electrically connected to the voltage acquisition circuits respectively so as to transmit voltage data of the battery cells to the outside; and a part of the connecting ends are electrically connected to the temperature acquisition circuits respectively so as to transmit temperature data of the battery core to the outside. According to the utility model, the wiring harness wiring of the cell data acquisition circuit can be simplified, the wiring difficulty of the cell data acquisition circuit is effectively reduced, the complexity of the wiring harness is reduced, the problems of interface redundancy and reliability of the cell data acquisition circuit are solved, and the maintenance and repair of the circuit are more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle battery monitoring technical field especially relates to a battery voltage temperature acquisition board of electric formula racing car. BACKGROUND

[0002] In the current university student electric formula (Formula Student Electric China, FSEC) race technology practice, when each team monitors and manages the battery module monomer cell parameter, the voltage and temperature of the cell are often collected separately by independent circuit boards. The existing technical implementation mode is usually to separately set the voltage collection and temperature collection ports in different collection boards or different positions on the same board, and to connect by independent connectors. This voltage and temperature independent collection scheme has the following technical defects in actual application:

[0003] (1) The wire harness is complex and difficult to comb: because the voltage collection and temperature collection belong to different output interfaces, the team needs to draw out the voltage wire harness and the temperature wire harness from each position of the battery module. Multiple independent wire harnesses are intertwined in the vehicle body, causing complex wire harness layout, large space occupation, which is not conducive to pre-race wiring and maintenance, and increases the difficulty of fault point troubleshooting.

[0004] (2) Interface redundancy and reliability problem: when the voltage and temperature sensing channels correspond to independent connectors respectively, multiple connectors need to be used cooperatively. This not only increases the number of connectors and installation difficulty, but also increases the risk of poor contact, plug error and looseness at multiple connection points, reducing the reliability and safety of data collection.

[0005] (3) Maintenance is inconvenient: due to the dispersion of the wire harness, if the cell parameter is abnormal during the competition or test, the technician needs to find the fault point line by line. The lack of unified centralized management interface makes fault troubleshooting time-consuming and laborious, affecting the efficiency of time-limited maintenance in the competition.

[0006] The root cause of the above problems is that the existing technology tends to independently realize the voltage and temperature collection functions, and there is still a lack of a technical scheme that can unify the voltage collection and temperature collection in a single connector. Due to the lack of integrated design, further leads to the dispersion of components such as fuse (fusing protection element) and NTC (NTC) in the wire harness or external module, further leading to the complexity of the overall system layout. INVENTION CONTENTS

[0007] In order to solve the technical problems existing in the prior art to the greatest extent, the utility model provides a battery voltage temperature acquisition board of electric formula racing car, which aims at integrating voltage acquisition circuits and temperature acquisition circuits for collecting voltage data and temperature data of battery cells on a circuit board, can simplify wiring of battery cell data acquisition circuit, effectively reduce wiring difficulty of battery cell data acquisition circuit, reduce complexity of wiring, help to solve interface redundancy and reliability of battery cell acquisition circuit, and make maintenance of circuit more convenient.

[0008] The utility model relates to a battery voltage temperature acquisition board of electric formula racing car, which comprises:

[0009] A circuit board;

[0010] A plurality of voltage acquisition circuits for collecting voltage data of battery cells;

[0011] A plurality of temperature acquisition circuits for collecting temperature data of battery cells;

[0012] A connector integrated on the circuit board and used for connecting an external data acquisition system;

[0013] Wherein, each voltage acquisition circuit and each temperature acquisition circuit are integrated on the circuit board; the connector comprises a plurality of connection terminals, a part of the connection terminals are electrically connected to each voltage acquisition circuit to transmit voltage data of battery cells externally, and a part of the connection terminals are electrically connected to each temperature acquisition circuit to transmit temperature data of battery cells externally.

[0014] According to the battery voltage temperature acquisition board of electric formula racing car, the voltage acquisition circuits and the temperature acquisition circuits are integrated on the front and back surfaces of the circuit board.

[0015] According to the battery voltage temperature acquisition board of electric formula racing car, each voltage acquisition circuit is connected in series with an overcurrent protection element.

[0016] According to the battery voltage temperature acquisition board of electric formula racing car, the overcurrent protection element is a fuse.

[0017] According to the battery voltage temperature acquisition board of electric formula racing car, the overcurrent protection element is a positive temperature coefficient thermistor.

[0018] According to the battery voltage temperature acquisition board of electric formula racing car, each temperature acquisition circuit is connected in series with a temperature sensing element.

[0019] The temperature sensing element is a thermistor.

[0020] According to the battery voltage temperature acquisition board of the electric formula racing car, the temperature sensing element is close to the contact position of the circuit board and the pole lug of the battery cell, so that the temperature sensing element can be close to the battery cell.

[0021] According to the battery voltage temperature acquisition board of the electric formula racing car, the contact position of the circuit board and the pole lug of the plurality of battery cells is respectively integrated with a conductive pad, and each conductive pad is respectively connected in series on each voltage acquisition circuit.

[0022] According to the battery voltage temperature acquisition board of the electric formula racing car, the connector further comprises a socket, and the socket is perpendicular to the board surface of the circuit board.

[0023] The inside of the socket is formed with a sleeving cavity for matching the external plug, and each connecting end is arranged in the sleeving cavity.

[0024] Among them, the inner wall of the sleeving cavity is integrally formed with a plurality of limiting grooves and limiting blocks; the limiting grooves and the limiting blocks are adapted to match the outer wall shape structure of the external plug.

[0025] According to the battery voltage temperature acquisition board of the electric formula racing car, a plurality of number marks combined by letters and numbers are arranged on the circuit board, each number mark is different from each other and is close to the overcurrent protection element on each voltage acquisition circuit and the temperature sensing element on each temperature acquisition circuit.

[0026] The utility model discloses a battery voltage temperature acquisition board of electric formula racing car, and its main structure includes circuit board, a plurality of voltage acquisition circuits, a plurality of temperature acquisition circuits and the connector integrated on the circuit board, and the circuit board is as the basis of bearing each element, and a plurality of voltage acquisition circuits, a plurality of temperature acquisition circuits and the connector are integrated on the circuit board, when using, voltage acquisition circuit is responsible for obtaining the voltage information of electric core, and temperature acquisition circuit is responsible for obtaining electric core temperature information, and the connector is equipped with a plurality of connecting ends, and a part of connecting end is connected with voltage acquisition circuit to output voltage data, and another part of connecting end is connected with temperature acquisition circuit to output temperature data. The structure integrates voltage and temperature acquisition circuit in the same circuit board, can reduce space occupation and wiring complexity, and the integrated design of connector makes voltage and temperature data output through the same physical interface, simplifies and connects with external system, and voltage and temperature acquisition circuit electric connection is separated through each connecting end, to ensure that detection data is independent and reliable. Through the integrated acquisition board structure, data acquisition circuit can be simplified, wiring complexity is reduced, wiring efficiency and reliability are improved, voltage and temperature acquisition circuit are integrated on the same board and are output by single connector, realize data acquisition centralization, reduce wiring quantity and complexity, therefore can simplify the wiring of electric core data acquisition circuit, effectively reduce the wiring difficulty of electric core data acquisition circuit, reduce the complexity of wiring harness, help to solve the interface redundancy and reliability problem of electric core acquisition circuit, make the maintenance of circuit more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the following description drawings are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0028] Fig. 1 It is the perspective view of the utility model;

[0029] Fig. 2 It is the front view of the utility model;

[0030] Fig. 3 It is the back view of the utility model;

[0031] Fig. 4 It is the side view of the utility model.

[0032] Reference signs:

[0033] 1, circuit board;

[0034] 2, voltage acquisition circuit, 21, overcurrent protection element;

[0035] 3, temperature acquisition circuit, 31, temperature sensing element;

[0036] 4, connector, 41, connecting end, 42, socket, 421, sleeve cavity, 422, limiting groove, 423, limiting block;

[0037] 5, conductive pad;

[0038] 6, number identification. DETAILED DESCRIPTION

[0039] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as a limitation of the present application. In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0040] As Figs. 1 to 4 shown, the battery voltage temperature acquisition board of the electric formula racing car of the present embodiment comprises a circuit board 1, a plurality of voltage acquisition circuits 2 and a plurality of temperature acquisition circuits 3 are printed on the circuit board 1, that is, each voltage acquisition circuit 2 and each temperature acquisition circuit 3 are integrated and printed on the circuit board 1, the voltage acquisition circuit 2 is used for acquiring voltage data of the battery cell, the temperature acquisition circuit 3 is used for acquiring temperature data of the battery cell, in addition, the circuit board 1 is also integrated with a connector 4, the connector 4 is used for connecting an external data acquisition system, the connector 4 comprises a plurality of connecting ends 41, a part of the connecting ends 41 are respectively electrically connected to each voltage acquisition circuit 2 to transmit the voltage data of the battery cell to the outside, and a part of the connecting ends 41 are respectively electrically connected to each temperature acquisition circuit 3 to transmit the temperature data of the battery cell to the outside.

[0041] It can be understood that the battery voltage temperature acquisition board of the embodiment mainly includes a circuit board 1, a plurality of voltage acquisition circuits 2, a plurality of temperature acquisition circuits 3, and a connector 4 integrated on the circuit board 1. The circuit board 1 serves as the basis for carrying various elements, and integrates the plurality of voltage acquisition circuits 2, the plurality of temperature acquisition circuits 3, and the connector 4 on the circuit board 1. In use, the voltage acquisition circuit 2 is responsible for acquiring the voltage information of the battery cell, the temperature acquisition circuit 3 is responsible for acquiring the temperature information of the battery cell, and the connector 4 is provided with a plurality of connection ends 41 as contacts. A part of the connection ends 41 are connected to the voltage acquisition circuit 2 to output voltage data, and the other part of the connection ends 41 are connected to the temperature acquisition circuit 3 to output temperature data. This structure integrates the voltage and temperature acquisition circuits on the same circuit board, which can reduce the space occupation and wiring complexity. The integrated design of the connector 1 enables the voltage and temperature data to be output through the same physical interface, simplifying the connection with the external system, and the voltage and temperature acquisition circuit electrical connections are separated through the respective connection ends 41, thereby ensuring the independence and reliability of the detection data. The integrated acquisition board structure can simplify the data acquisition circuit, reduce the wiring complexity, improve the wiring efficiency and reliability, and by integrating the voltage and temperature acquisition circuits on the same board and outputting them through a single connector, the data acquisition is centralized, the number and complexity of wiring are reduced, thus the wiring of the battery cell data acquisition circuit can be simplified, the wiring difficulty of the battery cell data acquisition circuit is effectively reduced, the complexity of the wiring harness is reduced, which helps to solve the interface redundancy and reliability problem of the battery cell acquisition circuit, and makes the maintenance and repair of the circuit more convenient.

[0042] Optionally, the connector 4 of the embodiment selects MX34032UF2 type connector produced by JAE company of Japan, which has 32 connection ends 41, each of which is a contact. Specifically, 20 contacts of the connector 4 are electrically connected to 20 voltage acquisition circuits 2 respectively, and the 20 voltage acquisition circuits 2 are electrically connected to 20 battery cell tabs respectively. 12 contacts of the connector 4 are used for electrically connecting 6 temperature acquisition circuits 3, i.e. two contacts connect one temperature acquisition circuit 3.

[0043] In one embodiment, the voltage acquisition circuit 2 is integrated on the front surface of the circuit board 1, and the temperature acquisition circuit 3 is integrated on the back surface of the circuit board 1, i.e. the voltage acquisition circuit 2 and the temperature acquisition circuit 3 are respectively arranged on the front and back surfaces of the circuit board 1, the voltage acquisition circuit 2 acquires voltage data on the front surface of the circuit board 1, and the temperature acquisition circuit 3 acquires temperature data on the back surface of the circuit board 1, which are separated in space but connected to the same connector 4 through the circuit in the circuit board 1. It can be understood that arranging the voltage and temperature acquisition circuits on the front and back surfaces of the circuit board respectively makes full use of the two surfaces of the circuit board, improves the space utilization, separates the voltage and temperature acquisition circuits in space, which is conducive to reducing the electromagnetic interference between them, improving the accuracy of data acquisition, and is more conducive to circuit layout. Arranging the voltage acquisition circuit on the front surface facilitates the connection of the positive electrode of the battery cell, arranging the temperature acquisition circuit on the back surface facilitates the connection of the negative electrode of the battery cell, and the layout is more reasonable.

[0044] In one embodiment, in order to improve the safety of the voltage acquisition circuit 2 and prevent damage caused by overcurrent, an overcurrent protection element 21 is connected in series on each voltage acquisition circuit 2. When overcurrent occurs in the voltage acquisition circuit 2, the overcurrent protection element 21 can protect the circuit from damage. Through overcurrent protection, overcurrent caused by short circuit or other faults can be prevented, and the safety of the circuit is improved. Through the prevention of damage caused by overcurrent, the service life of the circuit can be prolonged. Optionally, the overcurrent protection element 21 is a fuse, which is a simple and reliable overcurrent protection element with low cost and easy replacement. It is a specific implementation of the overcurrent protection element 21. When overcurrent occurs in the circuit, the fuse will melt and disconnect the circuit, thereby protecting the voltage acquisition circuit 2 and other elements from damage. In addition to the fuse, the overcurrent protection element 21 can also be selected as a positive temperature coefficient thermistor (PTC). When overcurrent occurs in the circuit, the resistance value of the positive temperature coefficient thermistor (PTC) will increase to limit the current and protect the circuit. When the overcurrent disappears, the resistance value of the PTC will return to the normal value, and the circuit can continue to work without the need to replace the element. Unlike the fuse, the positive temperature coefficient thermistor can be reused, improving the reliability and service life of the circuit.

[0045] In one embodiment, a temperature sensing element 31 is connected in series on each temperature acquisition circuit 3. The temperature sensing element 31 can sense the temperature of the battery cell and convert the temperature information into an electrical signal, which can realize accurate measurement of the temperature of the battery cell. Specifically, the temperature sensing element 31 is a thermistor, which can sense the temperature of the battery cell and its resistance value changes with temperature. In actual use, on the one hand, the working temperature of the battery cell can be determined by detecting the temperature of the thermistor on the temperature acquisition circuit 3, and on the other hand, the working temperature of the battery cell can be calculated by detecting the resistance value of the thermistor on the temperature acquisition circuit 3.

[0046] Preferably, the temperature sensing element 31 is close to the contact position of the circuit board 1 with the electrode tab of the battery cell, so that the temperature sensing element 31 can be close to the battery cell. It can be understood that the temperature sensing element 31 close to the electrode tab of the battery cell can more directly sense the temperature of the battery cell, reduce the loss and delay in the heat transfer process, and thus can more accurately measure the temperature of the battery cell.

[0047] In one embodiment, the contact position of the circuit board 1 with the electrode tab of the plurality of battery cells is integrated with a conductive pad 5 respectively, and each conductive pad 5 is connected in series on each voltage acquisition circuit 2. The circuit board 1 can be contacted or electrically connected to each electrode tab of the battery cell through each conductive pad 5, ensuring that the voltage acquisition circuit can accurately acquire the voltage of the battery cell, and the conductive pad 5 integrated on the circuit board 1 can also facilitate the installation and connection of the electrode tab of the battery cell.

[0048] In one embodiment, the connector 4 further comprises a socket 42, the socket 42 is perpendicular to the surface of the circuit board 1, the socket is installed perpendicular to the circuit board, facilitating the connection and layout of the wire harness, the socket 42 is formed with a socket cavity 421 inside, the socket cavity 421 is used to match the socket of the external plug, each connecting end 41 is located in the socket cavity 421, in addition, the inner wall of the socket cavity 421 is integrally formed with a plurality of limiting grooves 422 and limiting blocks 423; the limiting grooves 422 and the limiting blocks 423 are adapted to match the outer wall shape structure of the external plug. In this embodiment, the socket 42 is part of the connector 4, which is installed perpendicular to the circuit board 1, the socket cavity 421 is the space inside the socket 42, which is used to accommodate the external plug, the connecting end 41 is arranged in the socket cavity 421, which is used to connect with the contact of the external plug, the limiting grooves 422 and the limiting blocks 423 are the structure of the inner wall of the socket cavity 421, which is used to cooperate with the corresponding structure of the external plug to prevent misplug or looseness. In use, after the external plug is inserted into the socket cavity 421 of the socket 42, the contact of the external plug is in contact with each connecting end 41 to achieve electrical connection, and the limiting grooves 422 and the limiting blocks 423 cooperate with the corresponding structure of the external plug to ensure that the plug is correctly inserted and fixed. That is, the design of the socket and the socket cavity ensures the reliable connection of the connector with the external plug, and the design of the limiting grooves and the limiting blocks can prevent the plug from being misplugged, and the limiting grooves and the limiting blocks can prevent the plug from loosening.

[0049] In one embodiment, the circuit board 1 is provided with a plurality of number marks 6 composed of a letter and a number, each number mark 6 is different from each other and is close to the over-current protection element on each voltage acquisition circuit 2 and is close to the temperature sensing element on each temperature acquisition circuit 3 respectively, it can be understood that the number mark 6 is a part of the circuit board 1 and is used to identify different voltage acquisition circuits and temperature acquisition circuits, the number mark 6 can help the user to quickly identify different voltage acquisition circuits and temperature acquisition circuits, and is convenient for installation, debugging and maintenance.

[0050] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery voltage temperature acquisition board for an electric formula racing car, characterized by, include: Circuit board (1); Multiple voltage acquisition circuits (2) are used to acquire voltage data of the battery cells; Multiple temperature acquisition circuits (3) are used to acquire temperature data of the battery cell; Connector (4), integrated on the circuit board (1) and used to connect to an external data acquisition system; The voltage acquisition circuit (2) and the temperature acquisition circuit (3) are integrated on the circuit board (1); the connector (4) includes multiple connection terminals (41), some of which are electrically connected to the voltage acquisition circuit (2) to transmit the voltage data of the battery cell to the outside; some of which are electrically connected to the temperature acquisition circuit (3) to transmit the temperature data of the battery cell to the outside.

2. The battery voltage temperature acquisition board of the electric formula racing car according to claim 1, characterized in that, The voltage acquisition circuit (2) and the temperature acquisition circuit (3) are integrated on the front and back sides of the circuit board (1).

3. The battery voltage temperature acquisition board of an electric formula racing car according to claim 1, characterized in that, Each voltage acquisition circuit (2) is connected in series with an overcurrent protection element (21).

4. The battery voltage temperature acquisition board of an electric formula racing car according to claim 3, characterized in that, The overcurrent protection element (21) is a fuse.

5. The battery voltage temperature acquisition board of an electric formula racing car according to claim 3, characterized in that, The overcurrent protection element (21) is a positive temperature coefficient thermistor.

6. The battery voltage temperature acquisition board of an electric formula racing car according to claim 1, characterized in that, Each of the temperature acquisition circuits (3) is connected in series with a temperature sensing element (31).

7. The battery voltage temperature acquisition board of an electric formula racing car according to claim 6, characterized in that, The temperature sensing element (31) is a thermistor.

8. The battery voltage temperature acquisition board of an electric formula racing car according to claim 6, characterized in that, The temperature sensing element (31) is positioned close to the contact point between the battery cell tab on the circuit board (1) so that the temperature sensing element (31) can be close to the battery cell.

9. The battery voltage temperature acquisition board of an electric formula racing car according to claim 1, characterized in that, Conductive pads (5) are integrated on the circuit board (1) at the contact positions with the multiple battery cell tabs, and each of the conductive pads (5) is connected in series to each of the voltage acquisition circuits (2).

10. The battery voltage temperature acquisition board of an electric formula racing car according to claim 1, characterized in that, The connector (4) further includes a socket (42) that is perpendicular to the surface of the circuit board (1); The socket (42) has a socket cavity (421) inside for fitting an external plug, and each of the connection ends (41) is disposed in the socket cavity (421); The inner wall of the socket cavity (421) is integrally formed with several limiting grooves (422) and limiting protrusions (423); the limiting grooves (422) and limiting protrusions (423) are adapted to fit the outer wall shape structure of the socketed external plug.

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