Battery pack connector, battery pack, and vehicle

Abstract

The utility model discloses a battery pack connector, battery pack and vehicle, the battery pack connector includes the connecting base and is arranged on the socket of connecting base, the socket includes the shell, main terminal and interlock detection component, main terminal and interlock detection component all set up in the inside of shell, interlock detection component includes first subterminal, first wire, temperature sensor, second wire and second subterminal in series. The battery pack connector of the utility model has the basic function of transmission current or signal of connector again, has the battery pack output pole temperature detection function and connector cooperation interlock detection function, can prevent the overheat risk or virtual connection risk of battery pack connector.

Description

Technical Field

[0001] This utility model relates to battery packs, specifically to a battery pack connector, a battery pack, and a vehicle. Background Technology

[0002] In traditional battery pack safety detection mechanisms, high-voltage interlock detection typically uses interlock pins to determine the connection status of high-voltage connectors. With the development of new energy technologies and the continuous improvement of battery pack charge / discharge rates, the temperature at the high-voltage connector connections has gradually become an important aspect of battery pack monitoring. Poor contact can lead to increased contact resistance, resulting in elevated temperature during overcurrent and potentially posing safety risks. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a battery pack connector, a battery pack, and a vehicle, which have a battery pack output electrode temperature detection function and a connection interlock detection function, so as to prevent the battery pack connector from overheating or loose connection.

[0004] A battery pack connector according to the present invention includes a connecting base and a socket disposed on the connecting base. The socket includes a housing, a main terminal and an interlock detection component. The main terminal and the interlock detection component are both disposed inside the housing. The interlock detection component includes a first secondary terminal, a first wire, a temperature sensor, a second wire and a second secondary terminal connected in series.

[0005] Furthermore, the interlock detection component also includes a component housing connected to the inner wall of the outer casing. The first auxiliary terminal, the first wire, the second wire, and the second auxiliary terminal are all disposed inside the component housing. The temperature sensor is disposed outside the component housing. The component housing has a wire groove for the first wire or the second wire to pass through.

[0006] Furthermore, the socket also includes an inner housing disposed inside the outer casing, the inner housing forming a first receiving cavity, and a second receiving cavity forming between the outer casing and the inner housing. The main terminal is disposed in the first receiving cavity, and the interlock detection component is disposed in the second receiving cavity.

[0007] Furthermore, two inner housings are spaced apart along the second direction, and a main terminal is respectively disposed inside the two inner housings; the component housing is located between the two inner housings in the second direction, one side of the component housing is connected to the inner wall of the outer housing, and the temperature sensor outside the component housing faces the gap between the two inner housings.

[0008] Furthermore, the outer shell includes a first flat plate, a first arc-shaped plate, a second flat plate, and a second arc-shaped plate connected in sequence to form a closed ring. The first flat plate and the second flat plate are respectively disposed on different sides of the inner shell in a first direction, and the first arc-shaped plate and the second arc-shaped plate are respectively disposed on different sides of the inner shell in a second direction; wherein, the first direction and the second direction are orthogonal.

[0009] Furthermore, the temperature sensor is located on the side of the component housing near the connection base.

[0010] Furthermore, a positioning protrusion is provided on the side of the outer casing away from the socket.

[0011] Furthermore, the outer shell is provided with multiple reinforcing ribs at intervals.

[0012] A battery pack according to this utility model includes the aforementioned battery pack connector.

[0013] One type of vehicle according to this utility model includes the aforementioned battery pack.

[0014] The beneficial effects of this utility model are:

[0015] (1) The battery pack connector of this utility model has the basic function of transmitting current or signal, as well as the function of detecting the output temperature of the battery pack and the function of interlock detection of the connection, which can prevent the battery pack connector from overheating or loose connection.

[0016] (2) The battery pack connector of this utility model has a compact structure and high space utilization. Attached Figure Description

[0017] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0018] Figure 1 This is a schematic diagram of the structure of the battery pack connector of this utility model;

[0019] Figure 2 This is one of the cross-sectional views of the interlock detection component of this utility model;

[0020] Figure 3 This is the second cross-sectional view of the interlock detection component of this utility model;

[0021] Figure 4 This is the third cross-sectional view of the interlock detection component of this utility model;

[0022] Figure 5 This is a schematic diagram of the interlock detection component of this utility model;

[0023] Figure 6 This is a flowchart illustrating the working principle of the interlock detection component of this utility model.

[0024] The following labels are shown in the attached diagram:

[0025] 1-Connecting base, 101-Bolt through hole, 2-Inner shell, 3-Outer shell, 301-First flat plate, 302-First arc-shaped plate, 303-Second flat plate, 304-Second arc-shaped plate, 305-Positioning protrusion, 306-Reinforcing rib, 4-Main terminal, 5-Interlock detection component, 501-First auxiliary terminal, 502-First wire, 503-Temperature sensor, 504-Second wire, 505-Second auxiliary terminal, 506-Component housing, 507-Wire passage groove, 6-First receiving cavity, 7-Second receiving cavity. Detailed Implementation

[0026] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0027] like Figures 1-5 As shown, a battery pack connector in this embodiment includes a connecting base 1 and a socket disposed on the connecting base 1. The socket includes a housing 3, a main terminal 4, and an interlock detection component 5. Both the main terminal 4 and the interlock detection component 5 are disposed inside the housing 3. The interlock detection component 5 includes a first secondary terminal 501, a first wire 502, a temperature sensor 503, a second wire 504, and a second secondary terminal 505 connected in series. The temperature sensor 503 can be a thermistor, such as a negative temperature coefficient resistor. The resistance of the thermistor changes with the temperature of the high-voltage connector.

[0028] In use, the connecting base 1 is provided with multiple bolt through holes 101. The connecting base 1 is used to connect to the battery pack housing through multiple bolts. The main terminal 4 is used to connect to the wires of the battery pack so that the main terminal 4 serves as the output terminal of the battery pack. The BMS is connected to the battery pack connector through a wiring harness and a plug. The plug is provided with a main wiring terminal and a secondary wiring terminal.

[0029] The connection between the main terminal and main terminal 4 can be used to transmit current or signals to achieve power transmission, battery status monitoring data transmission, control signal transmission, etc.

[0030] like Figure 6As shown, after the secondary terminal is connected to the first secondary terminal 501 and the second secondary terminal 505, it can realize the detection of the battery pack output electrode temperature and the interlock detection of the connection. Specifically, on the one hand, the BMS can collect the real-time temperature detected by the temperature sensor 503 through the temperature acquisition channel of the acquisition chip. During the vehicle development stage, through real vehicle testing, the real-time temperature detected by the temperature sensor 503 and the actual operating temperature of the battery pack output electrode under different current conditions are tested to establish a relevant mapping relationship. Through this mapping relationship and the real-time temperature detected by the temperature sensor 503, the BMS can obtain a relatively accurate actual operating temperature of the battery pack output electrode. Thus, when the actual operating temperature of the battery pack output electrode is too high, the overall performance of the battery pack can be limited and adjusted to avoid the risk of overheating. On the other hand, the BMS can collect the real-time temperature detected by the temperature sensor 503 through the temperature acquisition channel of the acquisition chip. When the real-time temperature detected by the temperature sensor 503 or the resistance of the temperature sensor 503 is abnormal, it is determined that there is a risk of loose connection in the current battery pack connector and the interlock fault is reported in time.

[0031] As can be seen from the above, the battery pack connector in this embodiment has the basic function of transmitting current or signals, as well as the function of detecting the output temperature of the battery pack and the function of interlock detection of the connection, which can prevent the battery pack connector from overheating or loose connection.

[0032] In this embodiment, the interlock detection component 5 further includes a component housing 506 connected to the inner wall of the outer casing 3. The first auxiliary terminal 501, the first wire 502, the second wire 504, and the second auxiliary terminal 505 are all disposed inside the component housing 506. The temperature sensor 503 is disposed outside the component housing 506. The component housing 506 has a wire groove 507 for the first wire 502 or the second wire 504 to pass through.

[0033] When the temperature sensor 503 is connected in series, it can be configured such that the first auxiliary terminal 501, the first wire 502, the temperature sensor 503, the second wire 504, and the second auxiliary terminal 505 are connected in series sequentially. Alternatively, the temperature sensor 503 can be configured such that the first auxiliary terminal 501, the first wire 502, the second wire 504, and the second auxiliary terminal 505 are connected in series sequentially, with either the first wire 502 or the second wire 504 broken in the middle and the temperature sensor 503 connected in series at the break point. The first wire 502 can be directly connected in series with the second wire 504, or the first wire 502 can be connected to the internal circuit of the battery pack and then connected in series with the second wire 504 through the internal circuit of the battery pack.

[0034] The component housing 506 has a wire passage groove 507, which enables the temperature sensor 503 to be placed outside the component housing 506, thereby reducing the influence of the component housing 506 on the collected temperature, and thus improving the accuracy of the mapping relationship in the above-mentioned steps of establishing the relevant mapping relationship.

[0035] In this embodiment, the socket further includes an inner shell 2 disposed inside the outer shell 3. A first receiving cavity 6 is formed inside the inner shell 2, and a second receiving cavity 7 is formed between the outer shell 3 and the inner shell 2. The main terminal 4 is disposed in the first receiving cavity 6, and the interlock detection component 5 is disposed in the second receiving cavity 7.

[0036] The interlock detection component 5 and the main terminal 4 are located in different accommodating cavities, which can prevent interference when the socket is connected to the wiring harness plug of the BMS and ensure the connection stability between the plug and the socket.

[0037] In this embodiment, two inner housings 2 are spaced apart along the second direction, and a main terminal 4 is respectively provided inside the two inner housings 2; the component housing 506 is located between the two inner housings 2 in the second direction, one side of the component housing 506 is connected to the inner wall of the outer housing 3, and the temperature sensor 503 outside the component housing 506 faces the gap between the two inner housings 2.

[0038] In this embodiment, the outer shell 3 includes a first flat plate 301, a first arc-shaped plate 302, a second flat plate 303, and a second arc-shaped plate 304 connected in sequence to form a closed ring. The first flat plate 301 and the second flat plate 303 are respectively disposed on two different sides of the inner shell 2 in a first direction, and the first arc-shaped plate 302 and the second arc-shaped plate 304 are respectively disposed on two different sides of the inner shell 2 in a second direction; wherein, the first direction and the second direction are orthogonal.

[0039] The first direction can be up and down, and the second direction can be left and right. In this embodiment, the first plate 301 is located on the upper side of the inner housing 2, the second plate 303 is located on the lower side of the inner housing 2, the first arc-shaped plate 302 is located on the left side of the inner housing 2, the second arc-shaped plate 304 is located on the right side of the inner housing 2, the connecting base 1 is located on the front side of the socket, the component housing 506 is located on the lower side of the first plate 301, and the temperature sensor 503 is located on the lower side of the component housing 506. The opening of the outer housing 3 faces rearward, and the main terminal 4, the first auxiliary terminal 501, and the second auxiliary terminal 505 all extend rearward.

[0040] The first flat plate 301, the first arc-shaped plate 302, the second flat plate 303, and the second arc-shaped plate 304 are sequentially connected to form a closed ring, making the shape of the outer shell 3 the same as that of the waist-shaped hole. The internal space of the outer shell 3 in the left-right direction is greater than its internal space in the up-down direction. Therefore, the two inner shells 2 are spaced apart in the left-right direction. The gaps between the two inner shells 2 and the first arc-shaped plate 302 and the second arc-shaped plate 304 are basically the same, while the distance between the two inner shells 2 and the middle of the first flat plate 301 is larger. Therefore, the component shell 506 is arranged on the lower side of the middle of the first flat plate 301. The structure is compact and can make full use of the internal space of the outer shell 3, improve the space utilization rate, and reduce the overall volume of the battery pack connector.

[0041] In this embodiment, the temperature sensor 503 is located on the side of the component housing 506 closer to the connecting base 1, that is, the temperature sensor 503 is located on the front side of the component housing 506, so that the temperature sensor 503 is far away from the joint between the plug and the socket, reducing the influence of the external environment on the temperature sensor 503.

[0042] In this embodiment, a positioning protrusion 305 is provided on the side of the outer shell 3 away from the socket. The positioning protrusion 305 is located on the upper part of the outer shell 3. Specifically, the distance between the upper part of the first arc plate 302, the upper part of the second arc plate 304, and the rear end face of the first flat plate 301 and the connecting base 1 is smaller than the distance between the lower part of the first arc plate 302, the lower part of the second arc plate 304, and the rear end face of the second flat plate 303 and the connecting base 1. This causes the upper part of the outer shell 3 to protrude rearward beyond the lower part of the outer shell 3, thereby making the outer shell 3 asymmetrical. This serves as a prompt and positioning function when connecting with the plug, preventing connection errors and reducing assembly difficulty.

[0043] In this embodiment, the outer shell 3 is provided with a plurality of reinforcing ribs 306 at intervals on its exterior. The reinforcing ribs 306 can increase the strength of the outer shell 3 and prevent the outer shell 3 from deforming. The first plate 301 is used to install the component housing 506, so it has a high strength requirement. Three reinforcing ribs 306 are provided at intervals on the first plate 301, and one reinforcing rib 306 is provided on the first arc plate 302, the second plate 303, and the second arc plate 304, respectively.

[0044] One battery pack in this embodiment includes the aforementioned battery pack connector.

[0045] One vehicle in this embodiment includes the aforementioned battery pack. The vehicle can be, but is not limited to, a pure electric vehicle (PEV / BEV), a hybrid electric vehicle (HEV), a range-extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), or a new energy vehicle.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A battery pack connector, characterized in that: It includes a connecting base (1) and a socket disposed on the connecting base (1). The socket includes a housing (3), a main terminal (4) and an interlock detection component (5). The main terminal (4) and the interlock detection component (5) are both disposed inside the housing (3). The interlock detection component (5) includes a first secondary terminal (501), a first wire (502), a temperature sensor (503), a second wire (504), and a second secondary terminal (505) connected in series.

2. The battery pack connector according to claim 1, characterized in that: The interlock detection component (5) further includes a component housing (506) connected to the inner wall of the outer shell (3). The first auxiliary terminal (501), the first wire (502), the second wire (504) and the second auxiliary terminal (505) are all disposed inside the component housing (506). The temperature sensor (503) is disposed outside the component housing (506). The component housing (506) has a wire groove (507) for the first wire (502) or the second wire (504) to pass through.

3. The battery pack connector according to claim 2, characterized in that: The socket also includes an inner shell (2) disposed inside the outer shell (3), the inner shell (2) forms a first receiving cavity (6), a second receiving cavity (7) is formed between the outer shell (3) and the inner shell (2), the main terminal (4) is disposed in the first receiving cavity (6), and the interlock detection component (5) is disposed in the second receiving cavity (7).

4. The battery pack connector according to claim 3, characterized in that: Two inner housings (2) are spaced apart along the second direction, and a main terminal (4) is provided inside each of the two inner housings (2); the component housing (506) is located between the two inner housings (2) in the second direction, one side of the component housing (506) is connected to the inner wall of the outer housing (3), and the temperature sensor (503) outside the component housing (506) faces the gap between the two inner housings (2).

5. The battery pack connector according to claim 4, characterized in that: The outer shell (3) includes a first flat plate (301), a first arc-shaped plate (302), a second flat plate (303), and a second arc-shaped plate (304) connected in sequence to form a closed ring. The first flat plate (301) and the second flat plate (303) are respectively disposed on two sides of the inner shell (2) in a first direction, and the first arc-shaped plate (302) and the second arc-shaped plate (304) are respectively disposed on two sides of the inner shell (2) in a second direction; wherein the first direction and the second direction are orthogonal.

6. The battery pack connector according to claim 2, characterized in that: The temperature sensor (503) is located on the side of the component housing (506) near the connecting base (1).

7. The battery pack connector according to claim 1, characterized in that: A positioning protrusion (305) is provided on the side of the outer casing (3) away from the socket.

8. The battery pack connector according to claim 1, characterized in that: The outer shell (3) is provided with a plurality of reinforcing ribs (306) at intervals on the outside.

9. A battery pack, characterized in that: Includes the battery pack connector as described in any one of claims 1-8.

10. A vehicle, characterized in that: Includes the battery pack as described in claim 9.

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