Signal transmission terminal, signal transmission connector, battery and battery module

Abstract

The invention provides a signal transmission terminal and a battery. The signal transmission terminal comprises an upper cover, a lower cover and an elastic sheet terminal, the upper cover is provided with a first pin hole and a first limiting groove, the first pin hole penetrates through the upper cover, the lower cover is provided with a second pin hole and a second limiting groove, the second pin hole penetrates through the lower cover, the first pin hole and the second pin hole are in one-to-one correspondence and are communicated, and the elastic sheet terminal is arranged in the first limiting groove and the second limiting groove. The first clamping part is used for clamping a first contact pin inserted into the first contact pin hole and a second contact pin inserted into the second contact pin hole; the upper cover and the lower cover are used for being inserted into the battery cover plate, a sealing ring does not need to be arranged between the signal transmission terminal and the battery cover plate, the sealing performance between the signal transmission terminal and the battery cover plate can be guaranteed, electrolyte leakage is avoided, the structure and the process are simplified, and the cost is reduced. The elastic sheet terminals are arranged in the upper cover and the lower cover, and then the upper cover and the lower cover are sealed through the annular sealing part, so that assembly is easy.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a signal transmission terminal, a signal transmission connector, a battery and a battery module. Background Art Battery signal transmission terminals play a vital role in the battery system. They are responsible for transmitting the electrical energy or signals inside the battery to external devices or systems.

[0002] Battery signal transmission terminals usually need to monitor multiple battery properties, such as expansion force monitoring, temperature monitoring, internal resistance monitoring and voltage monitoring. Therefore, the battery cell needs to be electrically connected to the expansion force sensor, temperature sensor, internal resistance sensor and voltage sensor. During detection, it is necessary to connect to the expansion force sensor, temperature sensor, internal resistance sensor and voltage sensor respectively through multiple signal transmission lines, and transmit the various detected electrical signals to the battery management system (BMS).

[0003] The existing battery signal transmission terminal assembly includes an integrated transmission terminal and a terminal sleeve and a sealing ring sleeved outside the transmission terminal. The transmission terminal is provided with a plug-in hole, and a boss is provided in the middle section of the plug-in hole for fixing the metal spring. The two ends of the plug-in hole are used to plug the signal harness. The signal transmission terminal assembly is plugged into the battery cover plate, and a sealing ring is provided to achieve a sealed connection between the transmission terminal and the cover plate, and the terminal sleeve and the sealing ring are pressed against the battery cover plate in the up and down directions through a pressure plate. This type of signal transmission terminal assembly has a complex structure, the transmission terminal is difficult to process, and the metal spring is difficult to fix into the plug-in hole; therefore, how to overcome the above-mentioned technical problems and defects has become a key issue that needs to be solved. Summary of the invention

[0004] In view of the problem that the existing battery signal transmission terminal assembly has a complex structure, the present invention provides a signal transmission terminal, a signal transmission connector, a battery and a battery module.

[0005] The technical solution adopted by the present invention to solve the above technical problems is as follows: A first aspect of the present invention provides a signal transmission terminal, comprising an upper cover, a lower cover and a spring terminal; The upper cover and the lower cover are made of insulating elastic plastic, and are used to be plugged into the battery cover in a sealed manner; The upper cover is provided with a first pin hole and a first limiting groove, the first pin hole passes through the upper cover in the up-down direction, the first limiting groove has a first opening facing the outer periphery of the first pin hole, and the first limiting groove does not pass through the upper end of the upper cover; The lower cover is provided with a second pin hole and a second limiting groove, the second pin hole passes through the lower cover in the up-down direction, the second limiting groove has a second opening facing the side of the second pin hole, and the second limiting groove does not pass through the lower end of the lower cover; The upper cover and the lower cover are fixedly connected, and the upper cover and the lower cover are sealed by an annular sealing portion; The first pin hole and the second pin hole correspond to each other and are connected, and the first pin hole and the second pin hole are located inside the annular sealing portion; The spring terminal is arranged in the first limiting groove and the second limiting groove, and is used to clamp the first pin inserted into the first pin hole and the second pin inserted into the second pin hole.

[0006] Optionally, the upper cover is provided with an upper limit groove, the lower cover is provided with a lower limit groove, and the upper limit groove and the lower limit groove are combined to form a limit groove of the terminal fixing part; the first limit groove has a third opening connected to the limit groove of the terminal fixing part, and the second limit groove has a fourth opening connected to the limit groove of the terminal fixing part; The spring terminal includes a terminal fixing part, an upper terminal pin and a lower terminal pin, one end of the upper terminal pin and one end of the lower terminal pin are both connected to the terminal fixing part, and the other end of the upper terminal pin and the other end of the lower terminal pin are free ends; the terminal fixing part is clamped in the limiting groove of the terminal fixing part; the upper terminal pin is located in the first limiting groove, and a part of the upper terminal pin extends into the side of the first pin hole; the lower terminal pin is located in the second limiting groove, and a part of the lower terminal pin extends into the side of the second pin hole.

[0007] Optionally, the upper limit groove and the lower limit groove each include a first sub-groove and a second sub-groove, one end of the second sub-groove is connected to the first sub-groove, and the other end is correspondingly connected to the first limit groove and the second limit groove; The first limiting groove and the second limiting groove extend in the up-down direction, the second sub-groove extends in the front-back direction, and the first sub-groove extends in the left-right direction.

[0008] Optionally, the limiting groove of the terminal fixing portion is a T-shaped groove.

[0009] Optionally, the upper terminal pin and the lower terminal pin are spring sheets with arched middle portions.

[0010] Optionally, the first pin holes are provided in a plurality and arranged in an array, and the metal spring sheets are provided in a one-to-one correspondence with the first pin holes.

[0011] Optionally, the upper cover is an integrated structure, including an upper cover body and the first sealing portion surrounding the outer periphery of the upper cover body; The lower cover is an integrated structure, comprising a lower cover body and the second sealing portion surrounding the outer periphery of the lower cover body; The first sealing portion and the second sealing portion are connected to form the annular sealing portion.

[0012] Optionally, the annular sealing portion includes a plurality of positioning holes and a plurality of positioning pins, the plurality of positioning holes are arranged on the lower side of the first sealing portion and / or the upper side of the second sealing portion, the plurality of positioning pins are correspondingly arranged on the upper side of the second sealing portion and / or the lower side of the first sealing portion, and the plurality of positioning pins are plugged into the plurality of positioning holes in a one-to-one correspondence.

[0013] Optionally, the annular sealing portion includes a plurality of fixing grooves and a plurality of fixing strips, the plurality of fixing grooves are arranged on the lower side of the first sealing portion and / or the upper side of the second sealing portion, the plurality of fixing strips are correspondingly arranged on the upper side of the second sealing portion and / or the lower side of the first sealing portion, and the plurality of fixing strips are plugged into the plurality of fixing grooves in a one-to-one correspondence.

[0014] Optionally, the lower side of the first sealing portion and the upper side of the second sealing portion are connected as a whole via a welding surface.

[0015] Optionally, the insulating elastic plastic includes one or more of PPS, PFA, PBT, and PET; The material of the spring terminal is one or more of pure copper, beryllium copper, and phosphor bronze.

[0016] A second aspect of the present invention provides a signal transmission connector, comprising a signal output terminal, a signal transmission terminal and the above-mentioned signal input terminal, which are sealed and connected in sequence; The signal transmission terminal is used to be plugged into the cover plate, the signal input terminal is used to be arranged on the inner side of the cover plate, and the signal output terminal is used to be arranged on the outer side of the cover plate; the plug pins of the signal input terminal and the plug pins of the signal output terminal are inserted into the signal transmission terminal; The pin of the signal input terminal is connected to a cell status monitoring sensor located inside the battery through a first signal transmission line; The pin of the signal output terminal is connected to the battery management system through a second signal transmission line.

[0017] A third aspect of the present invention provides a battery, comprising a housing, a cover plate, a battery cell, a battery cell state monitoring sensor and the above-mentioned signal transmission connector; The battery cell is arranged in the shell, the battery cell state monitoring sensor is arranged on the battery cell, and the cover plate covers the shell.

[0018] A fourth aspect of the present invention provides a battery module, including a battery management system, and a plurality of the batteries described above, wherein the plurality of batteries are connected in series and / or in parallel; the battery management system is connected to the signal transmission connector of each of the batteries.

[0019] According to the signal transmission terminal provided by the present invention, by setting the signal transmission terminal as a structure of an upper cover and a lower cover, the material of the upper cover and the lower cover is insulating elastic plastic, and the upper cover and the lower cover are used to be plugged into the battery cover plate in a sealed manner, and there is no need to set a sealing ring between the signal transmission terminal and the battery cover plate, so that the sealing between the signal transmission terminal and the battery cover plate can be ensured, and electrolyte leakage can be avoided, thereby simplifying the structure and process; the spring terminal can be firstly set in the upper cover and the lower cover, and then the upper cover and the lower cover are sealed by the annular sealing part, which is easy to assemble, and the first pin hole and the second pin hole are located on the inner side of the annular sealing part to ensure the sealing; A first limiting groove is arranged on the periphery of the first pin hole, and a second limiting groove is arranged on the periphery of the second pin hole. During assembly, the present invention fixes a part of the spring terminal in the first limiting groove, and then fixes the other part of the spring terminal in the second limiting groove, thereby completing the rapid assembly of the spring terminal; and the signal transmission terminal is arranged as an upper cover and a lower cover structure, which reduces the difficulty of opening the first limiting groove and the second limiting groove; by opening the first limiting groove on the upper cover and the second limiting groove on the lower cover, the spring terminal is fixed in the first limiting groove and the second limiting groove, which is different from other embodiments. As for the pin hole with a limiting groove, the pin hole of the present application does not need to enlarge the aperture to accommodate the spring terminal and the pin at the same time. The inner wall of the pin hole of the present application can fit tightly with the outer wall of the pin. Since the first limiting groove does not pass through the upper end of the upper cover, and the second limiting groove does not pass through the lower end of the lower cover, the inner wall of the pin hole can fit tightly with the outer wall of the pin to achieve the pin blocking the first pin hole and the second pin hole, thereby improving the sealing performance between the pin hole and the pin and preventing impurities from entering the pin hole. At the same time, the spring terminal can further clamp the pin to prevent the pin from moving in the pin hole and limit the pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a first exploded schematic diagram of a signal input terminal provided by an embodiment of the present invention; Figure 2 is a second exploded schematic diagram of a signal input terminal provided by an embodiment of the present invention; Figure 3 is a schematic structural diagram of a signal input terminal provided by an embodiment of the present invention; Figure 4 is a first cross-sectional schematic diagram of a signal input terminal provided by an embodiment of the present invention; Figure 5 is a second cross-sectional schematic diagram of a signal input terminal provided by an embodiment of the present invention; Figure 6 It is a schematic structural diagram of an upper cover in a signal input terminal provided by an embodiment of the present invention; Figure 7 It is a schematic diagram of the structure of a spring terminal in a signal input terminal provided by an embodiment of the present invention; The reference numerals in the drawings of the specification are as follows: 1-upper cover; 11-first pin hole; 12-first limiting groove; 13-first opening; 14-third opening; 15-upper cover body; 16-first sealing part; 2-lower cover; 21-second pin hole; 22-second limiting groove; 23-second opening; 24-fourth opening; 25-lower cover body; 26-second sealing part; 3-spring terminal; 31-terminal fixing part; 311-connecting end; 312-extension end; 32-upper terminal pin; 33-lower terminal pin; 4-annular sealing part; 41-positioning hole; 42-positioning pin; 43-fixing groove; 44-fixing strip; 5-limiting groove of terminal fixing part; 51-upper limiting groove; 52-lower limiting groove; 5a-first sub-slot; 5b-second sub-slot. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] like Figure 1-Figure 3 As shown, in one embodiment, the present invention provides a signal transmission terminal, including an upper cover 1, a lower cover 2 and a spring terminal 3; The upper cover 1 and the lower cover 2 are made of insulating elastic plastic, and are used to be plugged into the battery cover in a sealed manner; The upper cover 1 is provided with a first pin hole 11 and a first limiting groove 12. The first pin hole 11 passes through the upper cover 1 in the up-down direction. The first limiting groove 12 has a first opening 13 facing the outer periphery of the first pin hole 11. The first limiting groove 12 does not pass through the upper end of the upper cover 1. The lower cover 2 is provided with a second pin hole 21 and a second limiting groove 22. The second pin hole 21 penetrates the lower cover 2 in the up-down direction. The second limiting groove 22 has a second opening 23 facing the side of the second pin hole 21. The second limiting groove 22 does not penetrate the lower end of the lower cover 2. The upper cover 1 and the lower cover 2 are fixedly connected, and the upper cover 1 and the lower cover 2 are sealed by an annular sealing portion 4; The first pin hole 11 and the second pin hole 21 correspond to each other and are connected. The first pin hole 11 and the second pin hole 21 are located inside the annular sealing portion 4; The spring terminal 3 is disposed in the first limiting groove 12 and the second limiting groove 22 , and is used to clamp the first pin inserted into the first pin hole 11 and the second pin inserted into the second pin hole 21 .

[0026] Specifically, the present application collectively refers to the first pin and the second pin as pins; the present application collectively refers to the first pin hole 11 and the second pin hole 21 as pin holes.

[0027] Specifically, the signal transmission terminal of the present invention includes an upper cover 1 and a lower cover 2, and a first pin hole 11 provided on the upper cover 1 is connected to a second pin hole 21 provided on the lower cover 2; a pin of a signal input terminal is inserted into the first pin hole 11, and a pin of a signal output terminal is inserted into the second pin hole 21, and the pin of the signal input terminal abuts against the pin of the signal output terminal; thereby, the status of the battery cell monitored by the signal input terminal is transmitted to the signal output terminal, and the signal output terminal then transmits the signal to the battery management system for judging the health status of the battery cell.

[0028] Specifically, the material of the upper cover 1 and the lower cover 2 is corrosion-resistant and high-temperature resistant insulating elastic plastic. Therefore, the first pin hole 11 and the first pin hole 11 both have a certain expansibility. In the present invention, the cross-sectional area of ​​the pin hole is S1, and the cross-sectional area of ​​the first pin or the second pin is S2. S1 and S2 satisfy the relationship 0.85*S2≤S1≤0.95*S2; so that the first pin is tightly fitted with the inner wall of the first pin hole 11 or the second pin is tightly fitted with the inner wall of the second pin hole 21, avoiding the first pin from moving in the first pin hole 11 and limiting the first pin; or avoiding the second pin from moving in the second pin hole 21 and limiting the second pin.

[0029] The present invention sets the signal transmission terminal as a structure of an upper cover 1 and a lower cover 2. The material of the upper cover 1 and the lower cover 2 is corrosion-resistant and high-temperature-resistant insulating elastic plastic. The upper cover 1 and the lower cover 2 are used to be plugged into the battery cover in a sealed manner. There is no need to set a sealing ring between the signal transmission terminal and the battery cover, so the sealing between the signal transmission terminal and the battery cover can be ensured to avoid electrolyte leakage, thereby simplifying the structure and process. The spring terminal 3 can be firstly set in the upper cover 1 and the lower cover 2, and then the upper cover 1 and the lower cover 2 are sealed by the annular sealing part 4, which is easy to assemble. The first pin hole 11 and the second pin hole 21 are located on the inner side of the annular sealing part 4 to ensure the sealing. A first limiting groove 12 is arranged on the periphery of the first pin hole 11, and a second limiting groove 22 is arranged on the periphery of the second pin hole 21. During assembly, the present invention fixes a part of the spring terminal 3 in the first limiting groove 12, and then fixes the other part of the spring terminal 3 in the second limiting groove 22, thereby completing the rapid assembly of the spring terminal 3; and the signal transmission terminal is arranged as the structure of the upper cover 1 and the lower cover 2, which reduces the difficulty of opening the first limiting groove 12 and the second limiting groove 22; by opening the first limiting groove 12 on the upper cover 1 and the second limiting groove 22 on the lower cover 2, the spring terminal 3 is fixed in the first limiting groove 12 and the second limiting groove 22. In the groove 22, compared with other pin holes without limiting grooves, the pin hole of the present application does not need to enlarge the aperture to accommodate the spring terminal 3 and the pin at the same time. The inner wall of the pin hole of the present application can fit tightly with the outer wall of the pin. Since the first limiting groove 12 does not pass through the upper end of the upper cover 1, and the second limiting groove 22 does not pass through the lower end of the lower cover 2, the inner wall of the pin hole can fit tightly with the outer wall of the pin to achieve the pin blocking the first pin hole 11 and the second pin hole 21, thereby improving the sealing performance between the pin hole and the pin and preventing impurities from entering the pin hole; at the same time, the spring terminal 3 can further clamp the pin to prevent the pin from moving in the pin hole and limit the pin.

[0030] At the same time, when the first pin is not in contact with the second pin, the spring terminal 3 can be used as an intermediate transmission medium to transmit the signal detected by the first pin to the second pin, thereby ensuring smooth signal transmission between the first pin and the second pin.

[0031] like Figure 4-Figure 5 As shown, in one embodiment, an upper limit groove 51 is provided on the upper cover 1, and a lower limit groove 52 is provided on the lower cover 2, and the upper limit groove 51 and the lower limit groove 52 are combined to form a terminal fixing portion limit groove 5; the first limit groove 12 has a third opening 14 connected to the terminal fixing portion limit groove 5, and the second limit groove 22 has a fourth opening 24 connected to the terminal fixing portion limit groove 5; The spring terminal 3 includes a terminal fixing portion 31, an upper terminal pin 32 and a lower terminal pin 33, one end of the upper terminal pin 32 and one end of the lower terminal pin 33 are both connected to the terminal fixing portion 31, and the other end of the upper terminal pin 32 and the other end of the lower terminal pin 33 are free ends; the terminal fixing portion 31 is snapped into the terminal fixing portion limiting groove 5; the upper terminal pin 32 is located in the first limiting groove 12, and a part of the upper terminal pin 32 extends into the side of the first pin hole 11; the lower terminal pin 33 is located in the second limiting groove 22, and a part of the lower terminal pin 33 extends into the side of the second pin hole 21.

[0032] Specifically, an upper limit groove 51 is provided on the upper cover 1, and the open end of the upper limit groove 51 faces the lower cover 2. Along the thickness direction of the upper cover 1, a third opening 14 is provided at the lower end of the first limit groove 12, and the third opening 14 is connected to the bottom of the upper limit groove 51; the cross-sectional surface of the first limit groove 12 and the upper limit groove 51 in the thickness direction of the upper cover 1 is L-shaped.

[0033] Specifically, a lower limit groove 52 is provided on the lower cover 2, and the opening end of the lower limit groove 52 faces the upper cover 1. Along the thickness direction of the lower cover 2, a fourth opening 24 is provided at the upper end of the second limit groove 22, and the fourth opening 24 is connected to the bottom of the lower limit groove 52; the cross-sectional surface of the second limit groove 22 and the lower limit groove 52 in the thickness direction of the lower cover 2 is L-shaped.

[0034] When the upper cover 1 and the lower cover 2 are closed, the upper limit groove 51 and the lower limit groove 52 are combined to form the terminal fixing part limit groove 5, and the terminal fixing part 31 is clamped in the terminal fixing part limit groove 5; the upper terminal pin 32 is located in the first limit groove 12, and a part of the upper terminal pin 32 extends into the side of the first pin hole 11. When the first pin enters the first pin hole 11, the upper terminal pin 32 will be squeezed to deform the upper terminal pin 32. The elastic force generated by the deformation of the upper terminal pin 32 clamps the first pin. ; Prevent the first pin from moving in the first pin hole 11 and limit the first pin; similarly, the lower terminal pin 33 is located in the second limiting groove 22, and a portion of the lower terminal pin 33 extends into the side of the second pin hole 21. When the second pin enters the second pin hole 21, the lower terminal pin 33 will be squeezed and deformed. The elastic force generated by the lower terminal pin 33 will also clamp the second pin; prevent the second pin from moving in the second pin hole 21 and limit the second pin.

[0035] like Figure 4-Figure 7 As shown, in one embodiment, the upper limit groove 51 and the lower limit groove 52 both include a first sub-groove 5a and a second sub-groove 5b, one end of the second sub-groove 5b is connected to the first sub-groove 5a, and the other end is correspondingly connected to the first limit groove 12 and the second limit groove 22; The first limiting groove 12 and the second limiting groove 22 extend in the up-down direction, the second branch groove 5b extends in the front-back direction, and the first branch groove 5a extends in the left-right direction.

[0036] The length direction, width direction and height direction of the cover 1 are described using a Cartesian coordinate system (x-axis, y-axis, z-axis), but other coordinates may also be used for description. In the Cartesian coordinate system, the x-axis, y-axis and z-axis are perpendicular to each other, but the implementation is not limited thereto. That is, the x-axis, y-axis and z-axis may cross each other at an angle. In the following description, for the convenience of description, the x-axis direction is referred to as the "front-back direction", the y-axis direction is referred to as the "left-right direction", and the z-axis direction is referred to as the "up-down direction". The first, second and third directions may be perpendicular to each other, or may cross each other at an angle.

[0037] Specifically, the terminal fixing portion 31 includes a connecting end 311 and two extending ends 312, one end of the two extending ends 312 is connected to the middle part of the connecting end 311, and the other ends of the two extending ends 312 are respectively connected to the lower end of the upper terminal pin 32 and the upper end of the lower terminal pin 33; and the two ends of the connecting end 311 extend out of the extending end 312 in the left and right directions; the extending end 312 extends in the front and back directions, and the first limiting groove 12 and the second limiting groove 22 extend in the up and down directions; therefore, the connecting end 311 of the terminal fixing portion 31 is located in the first sub-groove 5a; the extending end 312 is located in the second sub-groove 5b; the upper terminal pin 32 and the lower terminal pin 33 are respectively located in the first limiting groove 12 and the second limiting groove 22.

[0038] like Figure 6 As shown, in one embodiment, the limiting groove 5 of the terminal fixing portion is a T-shaped groove.

[0039] Specifically, the first sub-slot 5a extends in the left-right direction to the two ends of the second sub-slot 5b; the second sub-slot 5b extends in the front-back direction, therefore, the first sub-slot 5a and the second sub-slot 5b are vertically arranged; the first sub-slot 5a and the second sub-slot 5b are connected to form a T-shaped slot at the intersection, and the connecting end 311 of the terminal fixing part 31 is located in the first sub-slot 5a; the extending end 312 is located in the second sub-slot 5b; thereby preventing the connecting end 311 from detaching from the first sub-slot 5a, and further preventing the terminal fixing part 31 from detaching from the terminal fixing part limiting slot 5, effectively fixing the terminal fixing part in the limiting slot 5; and also effectively limiting the spring terminal 3.

[0040] like Figure 1-Figure 2 and Figure 4 As shown, in one embodiment, the upper terminal pin 32 and the lower terminal pin 33 are spring sheets with arched middle portions.

[0041] In the initial position, the free ends of the upper terminal pin 32 and the lower terminal pin 33 are respectively located in the first limiting groove 12 and the second limiting groove 22, and the arched parts in the middle are respectively located in the first pin hole 11 and the second pin hole 21; when the first pin enters the first pin hole 11, it will squeeze the upper terminal pin 32, so that the upper terminal pin 32 can be deformed and elongated in the first limiting groove 12 and attached to the side of the first limiting groove 12 opposite to the first pin hole 11; the elastic force generated by the upper terminal pin 32 will also push the first The pin is clamped; the first pin is prevented from moving in the first pin hole 11 and the first pin is limited; similarly, when the second pin enters the second pin hole 21, the lower terminal pin 33 will be squeezed, so that the lower terminal pin 33 can be deformed and elongated in the second limiting groove 22, and stick to the side of the second limiting groove 22 opposite to the second pin hole 21; the elastic force generated by the lower terminal pin 33 will also clamp the second pin; the second pin is prevented from moving in the second pin hole 21 and the second pin is limited.

[0042] like Figure 1-Figure 3 As shown, in one embodiment, the first pin holes 11 are provided in plurality and arranged in an array, and the metal springs are provided in a one-to-one correspondence with the first pin holes 11 .

[0043] In another embodiment, the second pin holes 21 are provided in plurality and arranged in an array, and the metal springs are provided in a one-to-one correspondence with the second pin holes 21 .

[0044] The number of the first pin holes 11 is the same as the number of the second pin holes 21 , and they are arranged in a one-to-one correspondence.

[0045] In one embodiment, the arrangement of the first pin holes 11 and the second pin holes 21 on the upper cover 1 and the lower cover 2 can be 2n; that is, the first pin holes 11 and the second pin holes 21 are arranged in two rows, and the first pin holes 11 and the second pin holes 21 in the first row are used to place the pins connected to the positive pole, and the first pin holes 11 and the second pin holes 21 in the second row are used to place the pins connected to the negative pole.

[0046] In a preferred embodiment, the first pin holes 11 can be arranged in a 2*4 manner; that is, there are 4 groups of pins, and the 4 groups of first pins are respectively used to collect and transmit the electrical signals generated by the expansion force sensor, temperature sensor, internal resistance sensor and voltage sensor of the battery cell; the second pin holes 21 are also arranged in a 2*4 manner; the 4 groups of second pins are respectively used to transmit the electrical signals monitored by the first pins to the battery management system, so as to monitor the safety status of the battery cell in real time and reduce the safety risk of the battery cell.

[0047] like Figure 1-Figure 3 As shown, in one embodiment, the upper cover 1 is an integrated structure, including an upper cover body 15 and a first sealing portion 16 surrounding the outer periphery of the upper cover body 15; The lower cover 2 is an integrated structure, including a lower cover body 25 and a second sealing portion 26 surrounding the outer periphery of the lower cover body 25; The first sealing portion 16 and the second sealing portion 26 are connected to form an annular sealing portion 4 .

[0048] Specifically, the first sealing portion 16 and the second sealing portion 26 are used to increase the contact area between the upper cover body 15 and the lower cover body 25 , and simultaneously seal and connect the upper cover body 15 and the lower cover body 25 .

[0049] Secondly, the signal transmission terminal of the present application is used to fix the cover plate. When in use, since the annular sealing portion 4 is arranged around the outer periphery of the upper cover body 15 and the outer periphery of the lower cover body 25, when the annular sealing portion 4 is connected to the cover plate, the annular sealing portion 4 can be used as a limiting component, thereby improving the firmness of the connection with the cover plate and avoiding problems such as misaligned connection between the signal transmission terminal and the cover plate.

[0050] like Figure 1-Figure 2 As shown, in one embodiment, the annular sealing portion 4 includes a plurality of positioning holes 41 and a plurality of positioning pins 42, the plurality of positioning holes 41 are arranged on the lower side of the first sealing portion 16 and / or the upper side of the second sealing portion 26, the plurality of positioning pins 42 are correspondingly arranged on the upper side of the second sealing portion 26 and / or the lower side of the first sealing portion 16, and the plurality of positioning pins 42 are plugged into the plurality of positioning holes 41 one by one.

[0051] Specifically, in one embodiment, a plurality of positioning holes 41 are provided at both ends of the lower side of the first sealing portion 16, and a plurality of positioning pins 42 are correspondingly provided at both ends of the upper side of the second sealing portion 26. The first sealing portion 16 and the second sealing portion 26 are fixedly connected by plugging in the plurality of positioning holes 41 and the plurality of positioning pins 42 in a one-to-one correspondence.

[0052] Specifically, in another embodiment, a plurality of positioning holes 41 are provided at both ends of the upper side of the second sealing portion 26, and a plurality of positioning pins 42 are correspondingly provided at both ends of the lower side of the first sealing portion 16, and the first sealing portion 16 and the second sealing portion 26 are fixedly connected by plugging in the plurality of positioning holes 41 and the plurality of positioning pins 42 in a one-to-one correspondence.

[0053] In other embodiments, a portion of the multiple positioning holes 41 and a portion of the multiple positioning pins 42 can be arranged at both ends of the lower side of the first sealing portion 16, and another portion of the multiple positioning holes 41 and another portion of the multiple positioning pins 42 can be arranged at both ends of the upper side of the second sealing portion 26. It is only necessary that when the first sealing portion 16 and the second sealing portion 26 are sealed, the two relatively arranged positioning pins 42 and the positioning holes 41 can be plugged in one by one.

[0054] like Figure 1-Figure 2 As shown, in one embodiment, the annular sealing portion 4 includes a plurality of fixing grooves 43 and a plurality of fixing strips 44, the plurality of fixing grooves 43 are arranged on the lower side of the first sealing portion 16 and / or the upper side of the second sealing portion 26, the plurality of fixing strips 44 are correspondingly arranged on the upper side of the second sealing portion 26 and / or the lower side of the first sealing portion 16, and the plurality of fixing strips 44 are plugged into the plurality of fixing grooves 43 one by one.

[0055] Specifically, in one embodiment, a plurality of fixing grooves 43 are arranged on both sides of the lower side of the first sealing portion 16, and a plurality of fixing strips 44 are correspondingly arranged on both sides of the upper side of the second sealing portion 26. The first sealing portion 16 and the second sealing portion 26 are fixedly connected by plugging in the plurality of fixing grooves 43 and the plurality of fixing strips 44 in a one-to-one correspondence.

[0056] Specifically, in another embodiment, a plurality of fixing grooves 43 are arranged on both sides of the upper side of the second sealing portion 26, and a plurality of fixing strips 44 are correspondingly arranged on both sides of the lower side of the first sealing portion 16. The first sealing portion 16 and the second sealing portion 26 are fixedly connected by plugging in the plurality of fixing grooves 43 and the plurality of fixing strips 44 in a one-to-one correspondence.

[0057] In other embodiments, part of the multiple fixing grooves 43 and part of the multiple fixing strips 44 can be arranged on both sides of the lower side of the first sealing portion 16, and another part of the multiple fixing grooves 43 and another part of the multiple fixing strips 44 can be arranged on both sides of the upper side of the second sealing portion 26. It is only necessary that when the first sealing portion 16 and the second sealing portion 26 are sealed, the two relatively arranged fixing strips 44 and the fixing grooves 43 can be plugged in one by one.

[0058] In one embodiment, the lower side of the first sealing portion 16 and the upper side of the second sealing portion 26 are connected as one body via a welding surface.

[0059] Specifically, the lower side of the first sealing part 16 contacts the upper side of the second sealing part 26, and the lower side of the first sealing part 16 and the upper side of the second sealing part 26 are ultrasonically treated to form a welding surface, which bonds and fixes the lower side of the first sealing part 16 and the upper side of the second sealing part 26 to achieve a sealing effect.

[0060] In one embodiment, the insulating elastic plastic includes one or more of PPS, PFA, PBT, and PET.

[0061] By using these insulating elastic plastics to prepare the upper cover 1 and the lower cover 2, the functional characteristics of compression sealing are achieved, thereby improving the sealing effect between the upper cover 1 and the lower cover 2.

[0062] In one embodiment, the material of the spring terminal 3 is one or more of pure copper, beryllium copper, and phosphor bronze.

[0063] The material of the spring terminal 3 is one or more of pure copper, beryllium copper, and phosphor bronze; thus, the spring terminal 3 has excellent electrical conductivity and improves the detection sensitivity of the signal input terminal.

[0064] A second aspect of the present invention provides a signal transmission connector, comprising a signal output terminal, a signal transmission terminal and the above-mentioned signal input terminal, which are sealed and connected in sequence; The signal transmission terminal is used to be plugged into the cover plate, the signal input terminal is used to be arranged on the inner side of the cover plate, and the signal output terminal is used to be arranged on the outer side of the cover plate; the plug pins of the signal input terminal and the plug pins of the signal output terminal are inserted into the signal transmission terminal; The pin of the signal input terminal is connected to the battery cell status monitoring sensor located inside the battery through the first signal transmission line; The pin of the signal output terminal is connected to the battery management system through the second signal transmission line.

[0065] The present invention installs the signal transmission connector on the cover plate, and the signal input terminal has reliable sealing, which prevents impurities from entering the interior of the signal transmission connector from the signal input terminal. At the same time, the signal input terminal ensures that the first signal transmission line is reliably connected to the signal transmission connector, avoiding the arrangement of a wireless transmission signal transmission connector on the outside of the battery cover plate, thereby improving the reliability of data transmission, reducing the overall cost of the battery, and increasing profit margins and market share.

[0066] A third aspect of the present invention provides a battery, comprising a housing, a cover plate, a battery cell, a battery cell state monitoring sensor and the above-mentioned signal transmission connector; The battery cell is arranged in the shell, the battery cell state monitoring sensor is arranged on the battery cell, and the cover plate covers the shell.

[0067] The battery of the present invention comprises a battery shell, a battery cell and a cover plate, wherein the battery shell is provided with a battery cell, and the open end of the battery shell is provided with a cover plate; a signal transmission connector is provided on the cover plate; a signal transmission terminal is plugged into the cover plate, and a signal input terminal is located on the inner side of the cover plate, and is used to be electrically connected to battery cell status monitoring sensors such as an expansion force sensor, a temperature sensor, an internal resistance sensor and a voltage sensor; a signal output terminal is located on the outer side of the cover plate, and the signal output terminal is electrically connected to the signal input terminal, so that the expansion force electric signal, the temperature electric signal, the internal resistance electric signal and the voltage electric signal received by the signal input terminal are transmitted to the signal output terminal, and the signal output terminal transmits the above electric signals to the battery management system, which is used to judge whether the expansion force, temperature, voltage of the battery cell and the internal resistance at a characteristic position are normal values, thereby monitoring the health status of the battery in real time.

[0068] A fourth aspect of the present invention provides a battery module, including a battery management system, and a plurality of the above-mentioned batteries, wherein the plurality of batteries are connected in series and / or in parallel; the battery management system is connected to signal transmission connectors of each battery.

[0069] The battery module described in the embodiment of the present invention is provided with a plurality of batteries, and the plurality of batteries are connected in series and / or in parallel with each other, so as to improve the capacity of the battery module, and a battery management system is provided in the battery module, and the battery management system is electrically connected to the signal output terminal, and the signal output terminal is electrically connected to the signal input terminal, so that the expansion force electric signal, temperature electric signal, internal resistance electric signal and voltage electric signal received by the signal input terminal are transmitted to the battery management system, so as to determine whether the expansion force, temperature, voltage and internal resistance at the characteristic position of the battery cell are normal values, so as to monitor the health status of the battery in real time.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A signal transmission terminal, characterized in that: It includes an upper cover, a lower cover and spring terminals; The upper cover and the lower cover are made of insulating elastic plastic [Z1], and the upper cover and the lower cover are used to be sealed and plugged into the battery cover plate; The upper cover is provided with a first pin hole and a first limiting groove, the first pin hole passes through the upper cover in the up-down direction, the first limiting groove has a first opening facing the outer periphery of the first pin hole, and the first limiting groove does not pass through the upper end of the upper cover; The lower cover is provided with a second pin hole and a second limiting groove, the second pin hole passes through the lower cover in the up-down direction, the second limiting groove has a second opening facing the side of the second pin hole, and the second limiting groove does not pass through the lower end of the lower cover; The upper cover and the lower cover are fixedly connected, and the upper cover and the lower cover are sealed by an annular sealing portion; The first pin hole and the second pin hole correspond to each other and are connected, and the first pin hole and the second pin hole are located inside the annular sealing portion; The spring terminal is arranged in the first limiting groove and the second limiting groove, and is used to clamp the first pin inserted into the first pin hole and the second pin inserted into the second pin hole.

2. The signal transmission terminal according to claim 1, characterized in that: The upper cover is provided with an upper limit groove, the lower cover is provided with a lower limit groove, the upper limit groove and the lower limit groove are combined to form a limit groove of the terminal fixing part; the first limit groove has a third opening connected to the limit groove of the terminal fixing part, and the second limit groove has a fourth opening connected to the limit groove of the terminal fixing part; The spring terminal includes a terminal fixing part, an upper terminal pin and a lower terminal pin, one end of the upper terminal pin and one end of the lower terminal pin are both connected to the terminal fixing part, and the other end of the upper terminal pin and the other end of the lower terminal pin are free ends; the terminal fixing part is clamped in the limiting groove of the terminal fixing part; the upper terminal pin is located in the first limiting groove, and a part of the upper terminal pin extends into the side of the first pin hole; the lower terminal pin is located in the second limiting groove, and a part of the lower terminal pin extends into the side of the second pin hole.

3. The signal transmission terminal according to claim 2, characterized in that: The upper limit groove and the lower limit groove each include a first sub-groove and a second sub-groove, one end of the second sub-groove is connected to the first sub-groove, and the other end is correspondingly connected to the first limit groove and the second limit groove; The first limiting groove and the second limiting groove extend in the up-down direction, the second sub-groove extends in the front-back direction, and the first sub-groove extends in the left-right direction.

4. The signal transmission terminal according to claim 3, characterized in that: The limiting groove of the terminal fixing part is a T-shaped groove.

5. The signal transmission terminal according to claim 2, characterized in that: The upper terminal pin and the lower terminal pin are spring sheets with arched middle portions.

6. The signal transmission terminal according to claim 1, characterized in that: The first pin holes are provided in a plurality and arranged in an array, and the metal springs are provided in a one-to-one correspondence with the first pin holes.

7. The signal transmission terminal according to any one of claims 1 to 6, characterized in that: The upper cover is an integrated structure, comprising an upper cover body and the first sealing portion surrounding the outer periphery of the upper cover body; The lower cover is an integrated structure, comprising a lower cover body and the second sealing portion surrounding the outer periphery of the lower cover body; The first sealing portion and the second sealing portion are connected to form the annular sealing portion.

8. The signal transmission terminal according to claim 7, characterized in that: The annular sealing portion includes a plurality of positioning holes and a plurality of positioning pins, wherein the plurality of positioning holes are arranged on the lower side of the first sealing portion and / or the upper side of the second sealing portion, and the plurality of positioning pins are correspondingly arranged on the upper side of the second sealing portion and / or the lower side of the first sealing portion, and the plurality of positioning pins are plugged into the plurality of positioning holes in a one-to-one correspondence.

9. The signal transmission terminal according to claim 8, characterized in that: The annular sealing portion includes a plurality of fixing grooves and a plurality of fixing strips, wherein the plurality of fixing grooves are arranged on the lower side of the first sealing portion and / or the upper side of the second sealing portion, and the plurality of fixing strips are correspondingly arranged on the upper side of the second sealing portion and / or the lower side of the first sealing portion, and the plurality of fixing strips are plugged into the plurality of fixing grooves in a one-to-one correspondence.

10. The signal transmission terminal according to claim 7, characterized in that: The lower side of the first sealing portion and the upper side of the second sealing portion are connected as one body via a welding surface.

11. The signal transmission terminal according to claim 1, characterized in that: The insulating elastic plastic includes one or more of PPS, PFA, PBT, and PET; The material of the spring terminal is one or more of pure copper, beryllium copper, and phosphor bronze.

12. A signal transmission connector, characterized in that: It comprises a signal output terminal, a signal transmission terminal and a signal input terminal as claimed in any one of claims 1 to 11 which are sealed and connected in sequence; The signal transmission terminal is used to be plugged into the cover plate, the signal input terminal is used to be arranged on the inner side of the cover plate, and the signal output terminal is used to be arranged on the outer side of the cover plate; the plug pins of the signal input terminal and the plug pins of the signal output terminal are inserted into the signal transmission terminal; The pin of the signal input terminal is connected to a cell status monitoring sensor located inside the battery through a first signal transmission line; The pin of the signal output terminal is connected to the battery management system through a second signal transmission line.

13. A battery, characterized in that: It comprises a housing, a cover plate, a battery cell, a battery cell status monitoring sensor and a signal transmission connector as claimed in claim 12; The battery cell is arranged in the shell, the battery cell state monitoring sensor is arranged on the battery cell, and the cover plate covers the shell.

14. A battery module, characterized in that: It comprises a battery management system, and a plurality of batteries as claimed in claim 13, wherein the plurality of batteries are connected in series and / or in parallel; the battery management system is connected to the signal transmission connector of each of the batteries.

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