Signal transmission connector, battery and battery module

Abstract

The invention provides a signal transmission connector. The signal transmission connector comprises a signal input terminal, a signal transmission terminal and a signal output terminal, the signal input terminal comprises a first pin. The first end of the first pin is electrically connected with a first information input wire harness; the signal output terminal comprises a second pin, and the second end of the second pin is used for being electrically connected with a second information input wire harness. The signal transmission terminal comprises a third base and an elastic sheet terminal; the third base is provided with a pin hole, and the elastic sheet terminal is located on the periphery of the pin hole. The second end of the first contact pin and the first end of the second contact pin are embedded into the contact pin hole and are electrically connected through the elastic sheet terminal; the signal input terminal is connected with the battery cell state monitoring sensor, and the signal output terminal is connected with the battery management system, so that various state signals, monitored by the signal input terminal, of the battery cell are transmitted to the battery management system, the battery management system can judge the health condition of the battery cell, and the safety state of the battery cell can be monitored in real time; and the safety risk of the battery cell is reduced.

Description

Technical Field

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

[0002] Smart batteries 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). The two ends of the existing signal transmission connector are open structures. Although it is convenient to install the signal transmission line, it will cause the sealing performance of the battery to decrease. At the same time, the end of the signal transmission line cannot be fixed, and the signal transmission line is easy to fall off, affecting the accuracy of the detection. 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

[0003] In view of the problems of poor sealing performance and poor fixation of existing signal transmission connectors, the present invention provides a signal transmission connector, a battery and a battery module.

[0004] 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 connector, comprising a signal input terminal, a signal transmission terminal and a signal output terminal; The signal input terminal includes a first base and a first pin; the first pin is inserted along a first direction and fixed to the first base, the first end of the first pin is arranged in the first base and exposed outside the first base, and is used to electrically connect to a first information input harness located in the battery housing; the second end of the first pin extends out of the first base; The signal output terminal includes a second base and a second plug pin, the second plug pin is arranged along the first direction and fixed to the second base, the first end of the second plug pin is arranged in the second base and exposed outside the second base, and is used to electrically connect to the second information input harness located in the battery housing; the second end of the second plug pin extends out of the second base; the signal transmission terminal includes a third base and a spring terminal; the third base is provided with a pin hole that passes through both sides of the signal transmission terminal along the first direction, and the spring terminal is located at the periphery of the pin hole; The first base and the second base are respectively sealed and connected to two sides of the signal transmission terminal in the first direction, the second end of the first plug pin and the second end of the second plug pin are embedded in the plug pin hole, the spring terminal abuts against the side of the first plug pin and the side of the second plug pin, and the first plug pin and the second plug pin are electrically connected through the spring terminal; The first base and the second base are made of insulating hard plastic, and the third base is made of insulating elastic plastic; the third base is used to be sealed and penetrated through the battery cover.

[0005] Optionally, the third base is further provided with a fixed limiting groove; the fixed limiting groove is provided outside the pin hole and communicates with the pin hole; the spring terminal is provided in the fixed limiting groove and partially extends into the outer periphery of the pin hole; The cross-sectional area of ​​the pin hole is S1, the cross-sectional area of ​​the first pin or the second pin is S2, and S1 and S2 satisfy the relationship 0.80*S2≤S1≤0.95*S2.

[0006] Optionally, the first base is in contact with the third base via a plane, and the third base is in contact with the second base via a plane.

[0007] Optionally, the height of the first base in the first direction, the height of the second base in the first direction, and the height of the third base in the first direction increase sequentially.

[0008] Optionally, the outer periphery of the first base is aligned with the outer periphery of an end of the third base close to the first base; The outer periphery of the second base is aligned with the outer periphery of an end of the third base close to the second base.

[0009] Optionally, the first pin and the second pin are abutted or spaced apart.

[0010] Optionally, the first base includes a first base body and a pressure block, a pressure block accommodating groove is provided on the side of the first base body facing away from the first pin, the pressure block is embedded in the pressure block accommodating groove, and the side of the pressure block is sealed and connected to the peripheral wall of the pressure block accommodating groove; one side of the pressure block in the first direction is connected to the bottom wall of the pressure block accommodating groove as a whole through a first welding surface.

[0011] Optionally, a first fixing pin hole is provided on the side of the first base body facing away from the first direction, one end of the first fixing pin hole is connected with one side of the first base body, the other end of the first fixing pin hole is connected with the bottom of the pressure block accommodating groove, the first end of the first pin is fixedly arranged in the first fixing pin hole, and one side of the pressure block in the first direction and one side of the first pin in the first direction are connected as a whole through a second welding surface.

[0012] Optionally, the second base includes a second base body and a top cover, a top cover receiving groove is provided on a side of the second base body facing away from the second plug pin, and the top cover is used to seal the top cover receiving groove.

[0013] Optionally, the top cover includes a top cover body, and a boss arranged on one side of the top cover body in the first direction; the top cover body is sealingly covered on the second base body, and the boss is embedded in the top cover receiving groove; the one side of the top cover body in the first direction and the one side of the second base body in the first direction are connected as a whole through a third welding surface; the boss and the side wall of the top cover receiving groove are connected as a whole through a fourth welding surface.

[0014] Optionally, the third base includes an upper cover and a lower cover, and 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 an annular sealing portion; the annular sealing portion is used to be sealingly disposed on the battery cover.

[0015] 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 fifth welding surface.

[0016] Optionally, the insulating hard plastic includes one or more of PPS, PET, PBT, and PFA; and / or, the insulating elastic plastic includes one or more of PPS, PFA, PBT, and PET; and / or, the materials of the first pin, the second pin, and the spring terminal are respectively one or more of pure copper, beryllium copper, and phosphor bronze.

[0017] A second aspect of the present invention provides a battery, comprising a housing, a cover plate, a battery cell, a battery cell status 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; 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 first plug pin of the signal input terminal and the second plug pin of the signal output terminal are inserted into the signal transmission terminal; The first 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 second pin of the signal output terminal is connected to a battery management system through a second signal transmission line.

[0018] A third 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 connector provided by the present invention, a spring terminal is arranged in the pin hole. When the first pin and / or the second pin are inserted into the pin hole, the side walls of the first pin and / or the second pin will abut against the spring terminal. On the one hand, the spring terminal is used to clamp the first pin and / or the second pin inserted into the pin hole; on the other hand, when the first pin is not in contact with the second pin, the spring terminal can be used as an intermediate transmission medium to transmit the signal detected by the first pin to the second pin, thereby ensuring the smoothness of signal transmission between the second end of the first pin and the second end of the second pin. ; Moreover, the third base is used to be sealed and penetrated through the battery cover, the signal input terminal is located on the inner side of the battery shell, and the signal output terminal is located on the side of the battery cover away from the battery shell; the signal input terminal is used to be electrically connected to the battery cell status monitoring sensor, and the signal output terminal is used to be electrically connected to the battery management system, so as to transmit various status signals of the battery cell monitored by the signal input terminal to the signal output terminal, and the signal output terminal then transmits the signal to the battery management system, so that the battery management system can judge the health status of the battery cell, thereby monitoring the safety status of the battery cell in real time and reducing the safety risk of the battery cell. 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 is a schematic structural diagram of a signal transmission connector provided by an embodiment of the present invention; Figure 2 yes Figure 1 Schematic cross-sectional view of the signal transmission connector shown Figure 1 ; Figure 3 yes Figure 1 Schematic cross-sectional view of the signal transmission connector shown Figure 2 ; Figure 4 is a cross-sectional schematic diagram of a signal input terminal in a signal transmission connector provided by an embodiment of the present invention; Figure 5 is a cross-sectional schematic diagram of a signal output terminal in a signal transmission connector provided by an embodiment of the present invention; Figure 6 is a cross-sectional schematic diagram of a signal transmission terminal in a signal transmission connector provided by an embodiment of the present invention; Figure 7 It is a schematic structural diagram of a spring terminal in a signal transmission connector provided by an embodiment of the present invention; Figure 8 yes Figure 1 An exploded schematic diagram of the signal transmission connector shown; Fig. 9 yes Figure 1 An exploded schematic diagram of the signal transmission connector shown in another perspective; The reference numerals in the drawings of the specification are as follows: 1-Signal input terminal; 11-First base; 111-First base body; 1111-Pressure block receiving groove; 1112-First fixed pin hole; 112-Pressure block; 1121-First wire hole; 12-First plug pin; 2-Signal output terminal; 21-Second base; 211-Second base body; 2111-Top cover receiving groove; 2112-Second fixed pin hole; 212-Top cover; 2121-Top cover body; 2122-Boss; 2123-Second wire hole; 22-Second plug pin; 3-Signal transmission terminal; 31-Third base; 311-Upper cover; 3111-Upper cover body; 31111-First plug pin hole; 31 112-first limiting groove; 31113-upper limiting groove; 3112-first sealing part; 312-lower cover; 3121-lower cover body; 31211-second pin hole; 31212-second limiting groove; 31213-lower limiting groove; 3122-second sealing part; 313-annular sealing part; 314-pin hole; 315-fixed limiting groove; 316-terminal fixing part limiting groove; 32-spring terminal; 321-terminal fixing part; 322-upper terminal pin; 323-lower terminal pin; 41-first welding surface; 42-second welding surface; 43-third welding surface; 44-fourth welding surface; 45-fifth welding surface. 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 and Figure 8-Figure 9 As shown, in one embodiment, a first aspect of the present invention provides a signal transmission connector, comprising a signal input terminal 1, a signal transmission terminal 3 and a signal output terminal 2; The signal input terminal 1 includes a first base 11 and a first pin 12; the first pin 12 is arranged along a first direction and fixed to the first base 11, and the first end of the first pin 12 is arranged in the first base 11 and exposed outside the first base 11, and is used to electrically connect to the first information input harness located in the battery housing; the second end of the first pin 12 extends out of the first base 11; The signal output terminal 2 includes a second base 21 and a second pin 22. The second pin 22 is arranged along a first direction and fixed to the second base 21. The first end of the second pin 22 is arranged in the second base 21 and exposed outside the second base 21, and is used to electrically connect to the second information input harness located in the battery housing; the second end of the second pin 22 extends out of the second base 21. The signal transmission terminal 3 includes a third base 31 and a spring terminal 32; the third base 31 is provided with a pin hole 314 that penetrates through both sides of the signal transmission terminal 3 along the first direction, and the spring terminal 32 is located at the periphery of the pin hole 314; The first base 11 and the second base 21 are respectively sealed and connected to the two sides of the signal transmission terminal 3 in the first direction, the second end of the first pin 12 and the second end of the second pin 22 are embedded in the pin hole 314, the spring terminal 32 abuts against the side of the first pin 12 and the side of the second pin 22, and the first pin 12 and the second pin 22 are electrically connected through the spring terminal 32; The first base 11 and the second base 21 are made of insulating hard plastic, and the third base 31 is made of insulating elastic plastic; the third base 31 is used to be sealed and penetrated through the battery cover.

[0026] Specifically, a spring terminal 32 is provided in the pin hole 314 of the present invention. When the first pin 12 and / or the second pin 22 are embedded in the pin hole 314, the side walls of the first pin 12 and / or the second pin 22 will abut against the spring terminal 32. On the one hand, the spring terminal 32 is used to clamp the first pin 12 and / or the second pin 22 inserted into the pin hole 314; on the other hand, when the first pin 12 is not in contact with the second pin 22, the spring terminal 32 can be used as an intermediate transmission medium to transmit the signal detected by the first pin 12 to the second pin 22, thereby ensuring the smoothness of signal transmission between the second end of the first pin 12 and the second end of the second pin 22.

[0027] Furthermore, the third base 31 is used to be sealed and penetrated through the battery cover, the signal input terminal 1 is located on the inner side of the battery shell, and the signal output terminal 2 is located on the side of the battery cover away from the battery shell; the signal input terminal 1 is used to be electrically connected to the battery cell status monitoring sensor, and the signal output terminal 2 is used to be electrically connected to the battery management system, so that various status signals of the battery cell monitored by the signal input terminal 1 are transmitted to the signal output terminal 2, and the signal output terminal 2 transmits the signal to the battery management system, so that the battery management system can judge the health status of the battery cell, thereby monitoring the safety status of the battery cell in real time and reducing the safety risk of the battery cell.

[0028] Specifically, a plurality of pin holes 314 are provided on the third base 31, and a spring terminal 32 is provided in each pin hole 314. A first pin 12 is provided at a position corresponding to the pin hole 314 on each first base 11, and a second pin 22 is provided at a position corresponding to the pin hole 314 on the second base 21. The first ends of the plurality of first pins 12 are electrically connected to the battery state monitoring sensor through the first information input harness respectively. The battery cell status monitoring sensor may include expansion force sensors, temperature sensors, internal resistance sensors, voltage sensors and other sensors. Specifically, one or more sensors may be set according to the situation. Each sensor may be set to one or more, and each sensor may be set to multiple to collect monitoring data at different positions of the battery cell. Among them: The expansion force sensor is used to collect the expansion force of the battery cell and evaluate the health status of the power battery based on the expansion force; the temperature sensor is used to collect the temperature of the battery cell and evaluate the health status of the power battery based on the temperature; the internal resistance sensor is used to collect the internal resistance of a specific position of the battery cell and evaluate the health status of the power battery based on the internal resistance; the voltage sensor is used to collect the voltage of the battery cell and evaluate the health status of the power battery based on the internal resistance. Therefore, the health status of the battery can be evaluated by collecting the expansion force, temperature, voltage and internal resistance of the characteristic position of the battery cell through multiple sensors, so as to monitor the safety status of the battery cell in real time and reduce the safety risk of the battery cell.

[0029] The second end of the first pin 12 is embedded in the pin hole 314 and electrically connected to the second end of the second pin 22; the second end of the second pin 22 is electrically connected to the battery management system through the second information input harness, and the expansion force, temperature, voltage and internal resistance of the battery cell at the characteristic position monitored by the signal input terminal 1 are transmitted to the signal output terminal 2, and the signal output terminal 2 transmits the signal to the battery management system so that the battery management system can determine the health status of the battery cell, thereby monitoring the safety status of the battery cell in real time and reducing the safety risk of the battery cell.

[0030] Specifically, by using insulating elastic plastic to prepare the third base 31, it is convenient to install and seal the third base 31 with the battery cover, so that the pin hole 314 has a certain degree of expansion, and the inner wall of the pin hole 314 can be tightly fitted with the outer wall of the first pin 12 and the second pin 22, thereby improving the sealing performance between the pin hole 314 and the first pin 12 and the second pin 22. The first pin 12 and the second pin 22 seal both ends of the pin hole of the third base 31 to prevent impurities from entering the pin hole 314. The first base 11 and the second base 21 are made of insulating hard plastic, which can fix and position the first pin 12 and the second pin 22. The third base 31 made of insulating elastic plastic can also seal the side of the first base 11 and the second base 21 that contacts it, ensuring the sealing between the first base 11, the third base 31, and the second base 21.

[0031] like Figure 6-Figure 7 As shown, in one embodiment, a fixed limiting groove 315 is further provided on the third base 31; the fixed limiting groove 315 is provided outside the pin hole 314 and communicates with the pin hole 314; the spring terminal 32 is provided in the fixed limiting groove 315 and partially extends into the outer periphery of the pin hole 314; Specifically, the spring terminal 32 is embedded in the fixed limiting groove 315. When the first pin 12 and the second pin 22 enter the pin hole 314, the spring terminal 32 extending into the pin hole 314 will be squeezed to deform the spring terminal 32. The elastic force generated by the deformation of the spring terminal 32 clamps the first pin 12 and the second pin 22, thereby preventing the first pin 12 and the second pin 22 from moving in the pin hole 314 and limiting the position of the first pin 12 and the second pin 22. The spring terminal 32 also realizes the connection between the first pin 12 and the second pin 22, thereby ensuring the smoothness of signal transmission between the signal input terminal 1 and the signal output terminal 2.

[0032] The cross-sectional area of ​​the pin hole 314 is S1, and the cross-sectional area of ​​the first pin 12 or the second pin 22 is S2, and S1 and S2 satisfy the relationship 0.80*S2≤S1≤0.95*S2; thereby, the first pin 12 and the second pin 22 are tightly fitted to the inner wall of the pin hole 314, preventing the first pin 12 and the second pin 22 from moving in the pin hole 314, and limiting the position of the first pin 12 and the second pin 22.

[0033] like Figure 2-Figure 3 As shown, in one embodiment, the first base 11 and the third base 31 are in contact with each other through a plane, and the third base 31 and the second base 21 are in contact with each other through a plane, so that the structure is simpler and more compact.

[0034] Specifically, in the first direction, the upper surface of the first base 11 abuts against the lower surface of the third base 31, and the upper surface of the third base 31 abuts against the lower surface of the second base 21, and the upper surface of the first base 11, the lower surface of the third base 31, the upper surface of the third base 31 and the lower surface of the second base 21 are all planes, so that when the first base 11, the third base 31 and the second base 21 are assembled, the upper surface of the first base 11 and the lower surface of the third base 31 are tightly fitted, and the upper surface of the third base 31 and the lower surface of the second base 21 are tightly fitted by pressing or the like, thereby increasing the sealing between the first base 11 and the third base 31, and the sealing between the third base 31 and the second base 21.

[0035] like Figure 2-Figure 3 As shown, in one embodiment, the height of the first base 11 in the first direction, the height of the second base 21 in the first direction, and the height of the third base 31 in the first direction increase sequentially.

[0036] Specifically, the first base 11 is located inside the cover plate. Therefore, when the height of the first base 11 in the first direction is small, it will not occupy too much internal space of the battery casing, thereby ensuring the energy density of the battery.

[0037] The second base 21 is located outside the cover plate. Therefore, when the height of the second base 21 in the first direction is relatively small, it will not occupy a large space of the battery module, thereby improving the space utilization of the battery module.

[0038] The third base 31 is sealed and connected to the battery cover. When the height of the third base 31 in the first direction is relatively large, on the one hand, it ensures that the contact area between the third base 31 and the battery cover is large, thereby improving the sealing performance between the third base 31 and the battery cover; on the other hand, when the first pin 12 and the second pin 22 are embedded in the pin hole 314, it is not easy to detach from the pin hole 314, thereby ensuring the smoothness of signal transmission between the signal input terminal 1 and the signal output terminal 2.

[0039] like Figure 2-Figure 3 As shown, in one embodiment, the outer periphery of the first base 11 is aligned with the outer periphery of one end of the third base 31 close to the first base 11; The outer periphery of the second base 21 is aligned with the outer periphery of one end of the third base 31 close to the second base 21. Thus, the structure is simpler and more compact, the upper surface of the first base 11 is closely fitted with the lower surface of the third base 31, and the upper surface of the third base 31 is closely fitted with the lower surface of the second base 21, thereby increasing the sealing between the first base 11 and the third base 31, and the sealing between the third base 31 and the second base 21, preventing impurities from entering the interior of the signal transmission connector, and ensuring the smoothness of signal transmission between the signal input terminal 1 and the signal output terminal 2.

[0040] like Figure 2-Figure 3 As shown, in one embodiment, the first pin 12 and the second pin 22 are arranged in abutment or at intervals.

[0041] Specifically, in one embodiment, when the first pin 12 and the second pin 22 are embedded in the pin hole 314, the second end of the first pin 12 and the second end of the second pin 22 may abut against each other or may not touch each other, and the side walls of the first pin 12 and the second pin 22 may abut against the spring terminal 32. The spring terminal 32 may serve as an intermediate transmission medium to transmit the signal of the first pin 12 to the second pin 22, thereby ensuring the smoothness of signal transmission between the second end of the first pin 12 and the second end of the second pin 22.

[0042] like Figure 2-Figure 4As shown, in one embodiment, the first base 11 includes a first base body 111 and a pressure block 112. A pressure block accommodating groove 1111 is provided on the side of the first base body 111 facing away from the first pin 12. The pressure block 112 is embedded in the pressure block accommodating groove 1111. The side of the pressure block 112 is sealed and connected to the peripheral wall of the pressure block accommodating groove 1111. One side of the pressure block 112 in the first direction is connected to the bottom wall of the pressure block accommodating groove 1111 as a whole through a first welding surface 41.

[0043] Specifically, the side of the pressure block 112 facing away from the first pin 12 is flush with the surface of the pressure block accommodating groove 1111, so that the pressure block 112 and the first base body 111 are connected as a whole, thereby improving the sealing between the pressure block 112 and the first base body 111, and will not occupy additional space outside the first base body 111, thereby reducing the space occupied when used on the battery cover, which is beneficial to improving the battery energy density.

[0044] Specifically, one side surface of the pressing block 112 is parallel to and fits with the bottom wall of the pressing block receiving groove 1111 of the first base body 111, and a first welding surface 41 is formed by ultrasonic treatment to bond and fix the pressing block 112 to the pressing block receiving groove 1111, thereby achieving a sealing effect.

[0045] like Figure 2-Figure 4 As shown, in one embodiment, a first fixing pin hole 1112 is provided on the side of the first base body 111 in the first direction away from the pressure block accommodating groove 1111, one end of the first fixing pin hole 1112 is connected to one side of the first base body 111, and the other end of the first fixing pin hole 1112 is connected to the bottom of the pressure block accommodating groove 1111, and the first end of the first insertion pin 12 is fixedly arranged in the first fixing pin hole 1112, and one side of the pressure block 112 in the first direction and one side of the first insertion pin 12 in the first direction are connected as a whole through a second welding surface 42.

[0046] One end of the first fixing pin hole 1112 passes through one side of the first base body 111 in the first direction, and the pressure block accommodating groove 1111 is provided on the other side of the first base body 111 in the first direction, and the pressure block accommodating groove 1111 is communicated with the other end of the first fixing pin hole 1112, and the first insertion pin 12 is passed through the first fixing pin hole 1112, and one end of the first insertion pin 12 extends out of the end of the first fixing pin hole 1112 away from the pressure block accommodating groove 1111, and the other end of the first insertion pin 12 is embedded in the end of the first fixing pin hole 1112 close to the pressure block accommodating groove 1111 and is coplanar with the bottom of the pressure block accommodating groove 1111, one side surface of the pressure block 112 is partially parallel to and fitted with a side surface of the first insertion pin 12, and a second welding surface 42 is formed by ultrasonic treatment, and the pressure block 112 and the first insertion pin 12 are bonded and fixed to achieve a sealing effect.

[0047] Furthermore, a first wire hole 1121 is provided on the pressing block 112 at a position corresponding to the first fixed pin hole 1112, and the first wire hole 1121 is used to pass the first information input wiring harness; the first pin 12 is located at one end in the first fixed pin hole 1112, and is used to connect the first information input wiring harness, and passes through one end between the first base body 111 and the pressing block 112 from the first wire hole 1121.

[0048] When in use, the portion of the first plug pin 12 extending out of the first fixed pin hole 1112 is plugged into the signal transmission terminal 3 and connected to the signal transmission terminal 3 through the first information input harness.

[0049] Specifically, the first plug pin 12 is provided with a first wire pressing groove facing the first wire hole 1121 to facilitate the connection of the first information input wire harness.

[0050] like Figure 2-Figure 3 and Figure 5 As shown, in one embodiment, the second base 21 includes a second base body 211 and a top cover 212 . A top cover receiving groove 2111 is provided on a side of the second base body 211 away from the second insertion pin 22 . The top cover 212 is used to seal the top cover receiving groove 2111 .

[0051] Specifically, the top cover 212 is used to seal the top cover receiving groove 2111 , so that the top cover 212 and the second base body 211 are connected as a whole, thereby improving the sealing between the top cover 212 and the second base body 211 .

[0052] like Figure 2-Figure 3 and Figure 5 As shown, in one embodiment, the top cover 212 includes a top cover body 2121, and a boss 2122 arranged on one side of the top cover body 2121 in the first direction; the top cover body 2121 is sealingly covered on the second base body 211, and the boss 2122 is embedded in the top cover receiving groove 2111; one side of the top cover body 2121 in the first direction and one side of the second base body 211 in the first direction are connected as a whole through a third welding surface 43; the boss 2122 and the side wall of the top cover receiving groove 2111 are connected as a whole through a fourth welding surface 44.

[0053] Specifically, a second fixed pin hole 2112 is provided on a side of the second base body 211 in the first direction away from the top cover receiving groove 2111, one end of the second fixed pin hole 2112 is connected to one side of the second base body 211, and the other end of the second fixed pin hole 2112 is connected to the bottom of the top cover receiving groove 2111, and the second pin 22 is fixedly set in the second fixed pin hole 2112; a boss 2122 is protrudingly provided on one side of the top cover body 2121, and the boss 2122 is embedded in the top cover receiving groove 2111, which not only has a sealing effect on the top cover receiving groove 2111, but also prevents the second pin 22 from moving in the first direction on the second base body 211 in the second fixed pin hole 2112, and limits the second pin 22 to prevent it from moving.

[0054] Specifically, the lower surface of the top cover body 2121 is parallel to and fitted with the upper surface of the second base body 211, and a third welding surface 43 is formed by ultrasonic treatment to bond and fix the lower surface of the top cover body 2121 to the upper surface of the second base body 211, thereby achieving a sealing effect.

[0055] Specifically, the outer side surface of the boss 2122 is arranged in contact with the side wall of the top cover receiving groove 2111, and the fourth welding surface 44 is formed by ultrasonic treatment to bond and fix the outer side surface of the boss 2122 to the side wall of the top cover receiving groove 2111 to achieve a sealing effect.

[0056] Furthermore, a second wire hole 2123 is provided on the top cover body 2121, and the second wire hole 2123 is used to pass the second information input harness; the second pin 22 is located at one end in the second fixed pin hole 2112, and is used to connect the second information input harness, and passes through one end between the second base body 211 and the top cover body 2121 from the second wire hole 2123.

[0057] When in use, the portion of the second plug pin 22 extending out of the second fixing pin hole 2112 is plugged into the signal transmission terminal 3 and connected to the signal transmission terminal 3 through the second information input harness.

[0058] Specifically, the second plug pin 22 is provided with a second wire pressing groove facing the second wire hole 2123 to facilitate the connection of the second information input wire harness.

[0059] like Figure 6-Figure 9 As shown, in one embodiment, the third base 31 includes an upper cover 311 and a lower cover 312, and the upper cover 311 is an integrated structure, including an upper cover body 3111 and a first sealing portion 3112 surrounding the outer periphery of the upper cover body 3111; The lower cover 312 is an integrated structure, including a lower cover body 3121 and a second sealing portion 3122 surrounding the outer periphery of the lower cover body 3121; The first sealing portion 3112 and the second sealing portion 3122 are connected to form an annular sealing portion 313 ; the annular sealing portion 313 is used to be sealingly disposed on the battery cover.

[0060] Specifically, the upper cover body 3111 is provided with a first pin hole 31111, a first limiting groove 31112 and an upper limit groove 31113. The first pin hole 31111 penetrates the upper cover body 3111 in the up-down direction. The first limiting groove 31112 has a first opening facing the outer periphery of the first pin hole 31111. The opening end of the upper limit groove 31113 faces the lower cover body 3121. Along the thickness direction of the upper cover body 3111, the lower end of the first limiting groove 31112 is provided with a third opening, and the third opening is connected to the bottom of the upper limit groove 31113. The cross-sectional surface of the first limiting groove 31112 and the upper limit groove 31113 in the thickness direction of the upper cover body 3111 is L-shaped. The lower cover body 3121 is provided with a second pin hole 31211, a second limiting groove 31212 and a lower limiting groove 31213. The second pin hole 31211 penetrates the lower cover body 3121 in the up-down direction. The second limiting groove 31212 has a second opening facing the side of the second pin hole 31211. The opening end of the lower limiting groove 31213 faces the upper cover body 3111. Along the thickness direction of the lower cover body 3121, the upper end of the second limiting groove 31212 is provided with a fourth opening. The fourth opening and the lower limiting groove 31213 are connected. The bottom of the second limit groove 31212 and the lower limit groove 31213 are L-shaped in a cross-sectional surface in the thickness direction of the lower cover body 3121; when the upper cover body 3111 and the lower cover body 3121 are closed, the first pin hole 31111 and the second pin hole 31211 correspond one by one and are connected to form a pin hole 314, and the first pin hole 31111 and the second pin hole 31211 are located on the inner side of the annular sealing part 313; the upper limit groove 31113 and the lower limit groove 31213 are combined to form a terminal fixing part limit groove 316.

[0061] The spring terminal 32 includes a terminal fixing portion 321, an upper terminal pin 322 and a lower terminal pin 323, one end of the upper terminal pin 322 and one end of the lower terminal pin 323 are both connected to the terminal fixing portion 321, and the other end of the upper terminal pin 322 and the other end of the lower terminal pin 323 are free ends; the terminal fixing portion 321 is snapped into the limiting groove 316 of the terminal fixing portion; the upper terminal pin 322 is located in the first limiting groove 31112, and a part of the upper terminal pin 322 extends into the side of the first pin hole 31111. When the first pin 12 enters the first pin hole 31111, the upper terminal pin 322 is squeezed and deformed. The elastic force generated by the deformation of the upper terminal pin 322 clamps the first plug pin 12, preventing the first plug pin 12 from moving in the first plug pin hole 31111, and limiting the first plug pin 12; similarly, the lower terminal pin 323 is located in the second limiting groove 31212, and a part of the lower terminal pin 323 extends into the side of the second plug pin hole 31211. When the second plug pin 22 enters the second plug pin hole 31211, it will squeeze the lower terminal pin 323, causing the lower terminal pin 323 to deform. The elastic force generated by the lower terminal pin 323 will also clamp the second plug pin 22, preventing the second plug pin 22 from moving in the second plug pin hole 31211, and limiting the second plug pin 22. The spring terminal 32 clamps the first plug pin 12 and the second plug pin 22 respectively, ensuring the smoothness of signal transmission between the first plug pin 12 and the second plug pin 22.

[0062] The upper cover body 3111 and the lower cover body 3121 are closed and fixedly connected, and the upper cover body 3111 and the lower cover body 3121 are sealed by the annular sealing portion 313; the first sealing portion 3112 and the second sealing portion 3122 are used to increase the contact area between the upper cover body 3111 and the lower cover body 3121, and at the same time seal the upper cover body 3111 and the lower cover body 3121.

[0063] like Figure 2-Figure 3 and Figure 6 As shown, in one embodiment, the lower side of the first sealing portion 3112 and the upper side of the second sealing portion 3122 are connected as a whole via a fifth welding surface 45 .

[0064] Specifically, the lower side of the first sealing part 3112 contacts the upper side of the second sealing part 3122, and the lower side of the first sealing part 3112 and the upper side of the second sealing part 3122 are ultrasonically treated to form a fifth welding surface 45, which bonds and fixes the lower side of the first sealing part 3112 and the upper side of the second sealing part 3122 to achieve a sealing effect.

[0065] In one embodiment, the insulating hard plastic includes one or more of PPS, PET, PBT, and PFA; and / or, the insulating elastic plastic includes one or more of PPS, PFA, PBT, and PET; and / or, the materials of the first pin 12, the second pin 22, and the spring terminal 32 are respectively one or more of pure copper, beryllium copper, and phosphor bronze.

[0066] The first base 11 and the second base 21 are made of insulating hard plastic, which has the functional property of compression sealing.

[0067] The third base 31 is made of insulating elastic plastic, which has the functional characteristics of compression sealing, thereby improving the sealing effect between the upper cover 311 and the lower cover 312 in the third base 31 .

[0068] The material of the first plug pin 12 and the second plug pin 22 is one or more of pure copper, beryllium copper, and phosphor bronze; thus, the first plug pin 12 and the second plug pin 22 have excellent electrical conductivity, thereby improving the detection sensitivity of the signal input terminal 1.

[0069] The material of the spring terminal 32 is one or more of pure copper, beryllium copper, and phosphor bronze; thus, the spring terminal 32 has excellent electrical conductivity and improves the detection sensitivity of the signal input terminal 1 .

[0070] A second 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 status monitoring sensor is arranged on the battery cell, and the cover plate covers the shell; The signal transmission terminal 3 is used to be plugged into the cover plate, the signal input terminal 1 is used to be arranged on the inner side of the cover plate, and the signal output terminal 2 is used to be arranged on the outer side of the cover plate; the first pin 12 of the signal input terminal 1 and the second pin 22 of the signal output terminal 2 are inserted into the signal transmission terminal 3; The first pin 12 of the signal input terminal 1 is connected to a cell status monitoring sensor located inside the battery through a first signal transmission line; The second pin 22 of the signal output terminal 2 is connected to the battery management system through a second signal transmission line.

[0071] 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 3 is plugged into the cover plate, and a signal input terminal 1 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 2 is located on the outer side of the cover plate, and the signal output terminal 2 is electrically connected to the signal input terminal 1, 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 1 are transmitted to the signal output terminal 2, and the signal output terminal 2 transmits the above-mentioned electric signal 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 the characteristic position are normal values, thereby monitoring the health status of the battery in real time.

[0072] The present invention installs the signal transmission connector on the cover plate, and the signal input terminal 1 has reliable sealing, which prevents impurities from entering the interior of the signal transmission connector from the signal input terminal 1. At the same time, the signal input terminal 1 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.

[0073] A third 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.

[0074] 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 2, and the signal output terminal 2 is electrically connected to the signal input terminal 1, so that the expansion force electric signal, temperature electric signal, internal resistance electric signal and voltage electric signal received by the signal input terminal 1 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.

[0075] 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 connector, characterized in that: It includes a signal input terminal, a signal transmission terminal and a signal output terminal; The signal input terminal includes a first base and a first pin; the first pin is inserted along a first direction and fixed to the first base, the first end of the first pin is arranged in the first base and exposed outside the first base, and is used to electrically connect to a first information input harness located in the battery housing; the second end of the first pin extends out of the first base; The signal output terminal includes a second base and a second plug pin, the second plug pin is arranged along the first direction and fixed to the second base, the first end of the second plug pin is arranged in the second base and exposed outside the second base, and is used to electrically connect to the second information input harness located in the battery housing; the second end of the second plug pin extends out of the second base; the signal transmission terminal includes a third base and a spring terminal; the third base is provided with a pin hole that passes through both sides of the signal transmission terminal along the first direction, and the spring terminal is located at the periphery of the pin hole; The first base and the second base are respectively sealed and connected to two sides of the signal transmission terminal in the first direction, the second end of the first plug pin and the second end of the second plug pin are embedded in the plug pin hole, the spring terminal abuts against the side of the first plug pin and the side of the second plug pin, and the first plug pin and the second plug pin are electrically connected through the spring terminal; The first base and the second base are made of insulating hard plastic, and the third base is made of insulating elastic plastic; the third base is used to be sealed and penetrated through the battery cover.

2. The signal transmission connector according to claim 1, characterized in that: The third base is also provided with a fixed limiting groove; the fixed limiting groove is provided outside the pin hole and communicates with the pin hole; the spring terminal is provided in the fixed limiting groove and partially extends into the outer periphery of the pin hole; The cross-sectional area of ​​the pin hole is S1, the cross-sectional area of ​​the first pin or the second pin is S2, and S1 and S2 satisfy the relationship 0.80*S2≤S1≤0.95*S2.

3. The signal transmission connector according to claim 2, characterized in that: The first base is in contact with the third base via a plane, and the third base is in contact with the second base via a plane.

4. The signal transmission connector according to claim 1, characterized in that: The height of the first base in the first direction, the height of the second base in the first direction, and the height of the third base in the first direction increase sequentially.

5. The signal transmission connector according to claim 1, characterized in that: The outer periphery of the first base is aligned with the outer periphery of an end of the third base close to the first base; The outer periphery of the second base is aligned with the outer periphery of an end of the third base close to the second base.

6. The signal transmission connector according to claim 1, characterized in that: The first plug pin and the second plug pin are abutted or spaced apart.

7. The signal transmission connector according to claim 1, characterized in that: The first base includes a first base body and a pressure block. A pressure block accommodating groove is provided on the side of the first base body facing away from the first pin. The pressure block is embedded in the pressure block accommodating groove. The side of the pressure block is sealed and connected to the peripheral wall of the pressure block accommodating groove. One side of the pressure block in the first direction is connected to the bottom wall of the pressure block accommodating groove as a whole through a first welding surface.

8. The signal transmission connector according to claim 8, characterized in that: A first fixing pin hole is provided on the first base body on the side away from the first direction, one end of the first fixing pin hole is connected with one side of the first base body, the other end of the first fixing pin hole is connected with the bottom of the pressure block accommodating groove, the first end of the first pin is fixedly arranged in the first fixing pin hole, and one side of the pressure block in the first direction and one side of the first pin in the first direction are connected as a whole through a second welding surface.

9. The signal transmission connector according to claim 1, characterized in that: The second base includes a second base body and a top cover. A top cover receiving groove is provided on a side of the second base body away from the second insertion pin, and the top cover is used to seal the top cover receiving groove.

10. The signal transmission connector according to claim 10, characterized in that: The top cover includes a top cover body and a boss arranged on one side of the top cover body in the first direction; the top cover body is sealingly covered on the second base body, and the boss is embedded in the top cover receiving groove; the one side of the top cover body in the first direction and the one side of the second base body in the first direction are connected as a whole through a third welding surface; the boss and the side wall of the top cover receiving groove are connected as a whole through a fourth welding surface.

11. The signal transmission connector according to claim 1, characterized in that: The third base includes an upper cover and a lower cover, wherein 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 an annular sealing portion; the annular sealing portion is used to be sealingly disposed on the battery cover.

12. The signal transmission connector according to claim 12, characterized in that: The lower side of the first sealing portion and the upper side of the second sealing portion are connected as a whole via a fifth welding surface.

13. The signal transmission connector according to claim 1, characterized in that: The insulating hard plastic includes one or more of PPS, PET, PBT, and PFA; and / or, the insulating elastic plastic includes one or more of PPS, PFA, PBT, and PET; and / or, the materials of the first pin, the second pin, and the spring terminal are respectively one or more of pure copper, beryllium copper, and phosphor bronze.

14. 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 any one of claims 1 to 14; 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; 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 first plug pin of the signal input terminal and the second plug pin of the signal output terminal are inserted into the signal transmission terminal; The first 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 second pin of the signal output terminal is connected to a battery management system through a second signal transmission line.

15. A battery module, characterized in that: It comprises a battery management system, and a plurality of batteries as claimed in claim 15, 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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