Sampling wire harness protection module and battery pack

Abstract

The utility model provides a sampling wire harness protection module and a battery pack, and belongs to the technical field of new energy batteries. Comprising a PCB which is arranged in a box body where a battery cell is located; the first connector is arranged at one end, extending in the first preset direction, of the PCB and fixedly connected with the PCB; the input terminals of the first connectors are electrically connected with the cell sampling wire harnesses in a one-to-one correspondence manner, and the output terminals of the first connectors are fixedly connected with the PCB; the first preset direction is the length direction of the PCB; the second connector is arranged at the other end, extending in the first preset direction, of the PCB, is arranged opposite to the first connector and is fixedly connected with the PCB; the input terminals of the second connector are fixedly connected with the PCB, and the output terminals of the second connector are electrically connected with BMS sampling wire harnesses in a one-to-one correspondence manner; and the plurality of fuses are arranged between the first connector and the second connector and are electrically connected with the interfaces on the first connector and the adjacent ends of the second connector in a one-to-one correspondence manner. According to the utility model, the problem of safety risk caused by no loop protection design of the existing cell sampling loop is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy batteries, and in particular to a sampling harness protection module and a battery pack. Background Art

[0002] With the rapid development of the new energy field, the integration of the power battery packs used is getting higher and higher. The number of cells in the battery pack is large. For safety reasons, it is necessary to reliably obtain the voltage and temperature signals of each cell inside the battery pack so as to feedback the BMS in time or the status of the cell, providing data support for the reliable and practical use of the power battery.

[0003] At present, the acquisition of the voltage and temperature signals of the battery cells in the battery pack is mainly carried out through the wiring harness. One end of the wiring harness is connected to each battery cell, and the other end is connected to the BMS sampling harness, which directly sends the sampling signal to the BMS. Since the sampling signal is transmitted directly, the voltage resistance level of the BMS is also low. If the sampling circuit is short-circuited, it may cause the battery cell to smoke, heat, catch fire, explode, and cause the BMS to burn out. Therefore, it is necessary to configure a protection model on the BMS sampling harness to provide reliable short-circuit protection for the battery cells and BMS in the battery pack. Utility Model Content

[0004] In view of this, the utility model proposes a sampling harness protection module and a battery pack which are easy to install and disassemble and can perform independent short-circuit protection on each independent signal circuit.

[0005] The utility model provides a sampling harness protection module, comprising:

[0006] PCB board, arranged in the box where the battery cell is located;

[0007] A first connector is arranged at one end of the PCB board extending in a first preset direction and fixedly connected to the PCB board; the input terminals of the first connector are electrically connected to the cell sampling harness in a one-to-one correspondence, and the output terminals of the first connector are fixedly connected to the PCB board; the first preset direction is the length direction of the PCB board;

[0008] A second connector is arranged at the other end of the PCB board extending along the first preset direction, is arranged opposite to the first connector, and is fixedly connected to the PCB board; an input terminal of the second connector is fixedly connected to the PCB board, and an output terminal of the second connector is electrically connected to the BMS sampling harness in a one-to-one correspondence;

[0009] A plurality of fuses are arranged between the first connector and the second connector and are electrically connected to the interface on the first connector and an end adjacent to the second connector in a one-to-one correspondence.

[0010] On the basis of the above technical solution, preferably, the edges of the PCB board extending along the first preset direction are all provided with mounting holes, and rivets are embedded in the mounting holes; the rivets are detachably connected to the box where the battery cell is located.

[0011] Preferably, the first connector and the second connector both include a first body and a plurality of pins; the first body has a first end face and a second end face that are relatively arranged along a first preset direction, and a card slot is provided on the first end face, and the card slot extends along the first preset direction and does not pass through the first body; a plurality of first through holes are provided on the inner surface of the card slot away from the first end face, and the plurality of first through holes are interconnected with the card slot; one ends of the plurality of pins are embedded in the first through holes in a one-to-one correspondence, and the other ends of the plurality of pins extend respectively along the first preset direction and in a direction close to the PCB board, and are attached to the surface of the PCB board; one end of the plurality of fuses is electrically connected to the ends of the plurality of pins of the first connector that are attached to the PCB board, and the other end is electrically connected to the ends of the plurality of pins of the second connector that are attached to the PCB board; the extension length of the plurality of pins in the card slot does not exceed the depth of the card slot.

[0012] Further preferably, a plurality of fuses are arranged along the surface of the PCB board, and adjacent fuses are arranged in parallel and at equal intervals.

[0013] Further preferably, a transparent insulating material layer is provided on the surfaces of the plurality of fuses.

[0014] Further preferably, first bosses are symmetrically arranged on the edge of the first body, the first bosses extend along the axial direction of the fuse and are adapted to the lengths of the plurality of pins extending out of the first body.

[0015] Further preferably, it also includes a third connector and a fourth connector; the third connector and the fourth connector both include a second body; the second body is provided with a plurality of second through holes, and metal sleeves are provided in the plurality of second through holes; the shape of the metal sleeve is adapted to the contour of the second through hole, and one end of each metal sleeve is electrically connected to one end of the battery cell sampling harness or one end of the BMS sampling harness in a one-to-one correspondence; the other end of the metal sleeve is matched and connected to a plurality of pins in a one-to-one correspondence.

[0016] Further preferably, a second boss and a third boss protruding outward are provided at the edge of the second body; a first groove and a second groove are correspondingly provided on the surface of the first body, the first groove and the second groove are both connected to the card slot, and the first groove is adapted to the shape of the second boss; the second groove is adapted to the shape of the third boss; the second boss, the third boss, the first groove and the second groove all extend along the first preset direction.

[0017] Further preferably, a flexible card board is provided on the second body, one end of the flexible card board is fixedly connected to the second body, and the other end extends outward in a direction away from the pin, and a limit block protruding outward is provided on the surface of the flexible card board; a third groove is correspondingly provided on the first body, the third groove is offset in a direction away from the PCB board, the contour of the third groove is adapted to the contour of the flexible card board, a fourth groove is provided on the inner surface of the third groove away from the PCB board, the third groove is connected to the card slot and the fourth groove; the contour of the fourth groove is adapted to the contour of the limit block.

[0018] On the other hand, the utility model also provides a battery pack, which has a plurality of battery cells arranged therein. The battery pack is provided with the above-mentioned sampling harness protection module, and the battery cell sampling harnesses led out of each battery cell are electrically connected one-to-one with the BMS sampling harness through the sampling harness protection module.

[0019] The sampling harness protection module and battery pack provided by the utility model have the following beneficial effects compared with the prior art:

[0020] (1) The utility model improves the safety risk problem of the conventional voltage and temperature sampling harness without circuit protection design, and adds a corresponding fuse to each voltage and temperature signal sampling circuit. When a short circuit occurs in the sampling circuit, the fuse blows immediately, thereby protecting the battery cell, the BMS, and the battery pack, avoiding the heating of the battery cell caused by the short circuit, continuous high-temperature self-discharge, and serious battery smoke, fire or explosion.

[0021] (2) The two ends of the protection module are connected to the wiring harness using a plug-in structure. After a short circuit protection occurs, the fuse of the corresponding circuit blows out, and the protection module can be easily removed by rivets and replaced, which improves the repair efficiency. The replaced protection module can be used again after repair;

[0022] (3) The protection module is a built-in structure. By adjusting the length of the battery cell sampling harness and the BMS sampling harness, the protection module can be placed in a specific area inside the battery pack without occupying additional space inside the battery pack and without affecting the layout of the battery cells and other components. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1This is a three-dimensional diagram of the explosion state of a sampling harness protection module and a battery pack of the utility model;

[0025] Figure 2 This is a stereoscopic diagram of a sampling harness protection module and a battery pack protection module of the utility model;

[0026] Figure 3 This is a top view of a sampling harness protection module and a battery pack protection module of the utility model;

[0027] Figure 4 This is a stereoscopic diagram of a protection module of a sampling harness protection module and a battery pack from another perspective of the present invention.

[0028] Figure 5 It is a stereoscopic diagram of a sampling harness protection module and a third connector and a fourth connector of a battery pack of the utility model.

[0029] Reference numerals: 1, PCB board; 2, first connector; 3, second connector; 4, fuse; 100, first body; 101, pin; 102, first end face; 103, second end face; 104, slot; 105, first through hole; 106, first boss; 107, first groove; 108, second groove; 109, third groove; 110, fourth groove;

[0030] 5. The third connector; 6. The fourth connector; 200. The second body; 201. The second through hole; 202. The metal sleeve; 203. The second boss; 204. The third boss; 205. The flexible card board; 206. The limit block. DETAILED DESCRIPTION

[0031] The following will be combined with the implementation of the utility model to clearly and completely describe the technical solutions in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] At present, the voltage and temperature signals of the battery cells in the battery pack are mainly collected through the wiring harness. One end of the wiring harness is connected to each battery cell, and the other end is connected to the BMS sampling harness to directly send the sampling signal to the BMS. Since the sampling signal is transmitted directly, the voltage resistance level of the BMS is also low. If the sampling circuit is short-circuited, it may cause the battery cell to smoke, heat, catch fire, explode, and cause the BMS to burn out. In view of this, if Figure 1 As shown, on the one hand, the utility model provides a sampling harness protection module, comprising:

[0033] The PCB board 1 is arranged in the box where the battery cell is located; the PCB board is the basis of the intermediate transfer and is used to install the first connector 2 and the second connector 3 described below.

[0034] The first connector 2 is arranged at one end of the PCB board 1 extending in the first preset direction and is fixedly connected to the PCB board 1; the input terminals of the first connector 2 are electrically connected to the cell sampling harness in a one-to-one correspondence, and the output terminals of the first connector 2 are fixedly connected to the PCB board 1; the first preset direction is the length direction of the PCB board 1. Figure 1 As shown, one end of the cell sampling harness is connected to the aluminum bar arranged on the pole ear connecting piece, and the other end is connected to the first connector 2.

[0035] The second connector 3 is arranged at the other end of the PCB board 1 extending along the first preset direction, is arranged opposite to the first connector 2, and is fixedly connected to the PCB board 1; the input terminal of the second connector 3 is fixedly connected to the PCB board 1, and the output terminal of the second connector 3 is electrically connected to the BMS sampling harness one by one.

[0036] A plurality of fuses 4 are disposed between the first connector 2 and the second connector 3 , and are electrically connected to the interface on the first connector 3 and an end adjacent to the second connector 3 in a one-to-one correspondence.

[0037] When an abnormal short circuit occurs, causing the fuse to partially overheat and melt, it can protect the battery cell and BMS and prevent the occurrence of a short circuit in the sampling circuit.

[0038] like Figure 2 and Figure 4 As shown, the edges of the PCB board 1 extending along the first preset direction are all provided with mounting holes 11, and rivets are embedded in the mounting holes 11; the rivets are detachably connected to the box where the battery core is located. The rivets used in the utility model are nylon or plastic rivets, which are fixed by snapping or riveting. If the PCB board 1 needs to be disassembled or maintained, it is only necessary to remove the rivets with a screwdriver. Of course, the PCB board 1 can also be fixed by bonding, bolting, and other easy-to-disassemble methods, which will not be described here.

[0039] like Figure 3 and Figure 4As shown, the first connector 2 and the second connector 3 both include a first body 100 and a plurality of pins 101; the first body 100 has a first end face 102 and a second end face 103 that are arranged opposite to each other along a first preset direction, the first end face 102 is provided with a card slot 104, the card slot 104 extends along the first preset direction and does not penetrate the first body 100; the inner surface of the card slot 104 away from the first end face 102 is provided with a plurality of first through holes 105, the plurality of first through holes 105 are interconnected with the card slot 104; the plurality of pins 101 are provided with a plurality of first through holes 105; One end of the plurality of pins 101 is embedded in the first through hole 105 in a one-to-one correspondence, and the other ends of the plurality of pins 101 extend along the first preset direction and the direction close to the PCB board 1 respectively, and are attached to the surface of the PCB board 1; one end of the plurality of fuses 4 is electrically connected to the ends of the plurality of pins 101 of the first connector 2 attached to the PCB board 1, and the other end is electrically connected to the ends of the plurality of pins 101 of the second connector 3 attached to the PCB board 1; the extension length of the plurality of pins 101 in the slot 104 does not exceed the depth of the slot 104.

[0040] A plurality of fuses 4 are arranged along the surface of the PCB board 1, and adjacent fuses 4 are arranged in parallel and at equal intervals. A transparent insulating material layer is arranged on the surface of the plurality of fuses 4. The first body 100 is symmetrically provided with a first boss 106 at the edge thereof, and the first boss 106 extends along the axial direction of the fuse 4 and is adapted to the length of each of the plurality of pins 101 extending out of the first body 100.

[0041] One end of the pin 101 is located inside the card slot 104, and it is not easy to be deformed by contacting foreign objects. The other end 101 of the pin is bent and fits on the surface of the PCB board 1 and further extends. In order to avoid deformation of the other end of the pin 101, the first boss 106 is further symmetrically arranged on both sides of the first body 100 to avoid direct contact between external components and the pin 101 and several fuses 4. In order to facilitate observation and processing, the fuse 4 adopts an integral FPC structure, which is transparent, thin and easy to connect. It is also convenient to observe the failed fuse part. The FPC structure can also play a certain protective function for the fuse. The FPC end is directly fixed to each pin by soldering. The two sides and the bottom of the first body 100 are fixed by solder paste welding; the end of the pin 101 close to the PCB board 1 is fixed by solder paste welding, and glue is applied to prevent oxidation and solder joint shedding.

[0042] like Figure 4 Combination Figure 5As shown, the utility model also includes a third connector 5 and a fourth connector 6; the third connector 5 and the fourth connector 6 both include a second body 200; the second body 200 is provided with a plurality of second through holes 201, and a metal sleeve 202 is provided in each of the plurality of second through holes 201; the shape of the metal sleeve 202 is adapted to the contour of the second through hole 201, and one end of each metal sleeve 202 is electrically connected to one end of the battery cell sampling harness or one end of the BMS sampling harness in a one-to-one correspondence; the other end of the metal sleeve 202 is matched and connected to a plurality of pins 101 in a one-to-one correspondence. In this embodiment, the pins 101 are arranged in a rectangular array. The first connector 2 and the second connector 3 are both male connector structures, i.e., pins. The third connector 5 and the fourth connector 6 are both female connectors, corresponding to the second through hole 201 and the metal sleeve 202.

[0043] In order to avoid the pin from being crooked, the second boss 203 and the third boss 204 are specially provided, and the first groove 107 and the second groove 108 matched therewith are realized to realize the functions of guiding and pre-positioning. Specifically: the second body 200 is provided with the second boss 203 and the third boss 204 protruding outward at the edge; the first groove 107 and the second groove 108 are correspondingly provided on the surface of the first body 100, and the first groove 107 and the second groove 108 are both connected with the card slot 104, and the first groove 107 is adapted to the shape of the second boss 203; the second groove 108 is adapted to the shape of the third boss 204; the second boss 203, the third boss 204, the first groove 107 and the second groove 108 are all extended along the first preset direction. The second boss 203 and the third boss 204 can constrain the matching plug-in process of the male and female heads. The metal sleeve 202 can be tightly fitted with the pin.

[0044] A flexible card board 205 is arranged on the second body 200, one end of the flexible card board 205 is fixedly connected to the second body 200, and the other end extends outward in a direction away from the pin 101, and a limit block 206 protruding outward is arranged on the surface of the flexible card board 205; a third groove 109 is correspondingly arranged on the first body 100, and the third groove 109 is offset in a direction away from the PCB board 1, and the contour of the third groove 109 is adapted to the contour of the flexible card board 105, and a fourth groove 110 is arranged on the inner surface of the third groove 109 away from the PCB board 1, and the third groove 109 is interconnected with the card slot 104 and the fourth groove 110; the contour of the fourth groove 110 is adapted to the contour of the limit block 206.

[0045] In order to facilitate the removal of the male and female heads, the flexible card board 205 has a certain elasticity. When the flexible card board 205 is in the initial position, the connected male and female heads will not separate; when the flexible card board 205 is pressed to separate the limit block 206 from the fourth groove 110, the connection between the sampling harness / BMS harness and the PCB board can be removed by pulling the female head horizontally, thereby achieving the purpose of replacing the PCB board.

[0046] On the other hand, the utility model also provides a battery pack, which has a plurality of battery cells arranged therein. The battery pack is provided with the above-mentioned sampling harness protection module, and the battery cell sampling harnesses led out of each battery cell are electrically connected one-to-one with the BMS sampling harness through the sampling harness protection module.

[0047] 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, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sampling harness protection module, characterized in that: include: A PCB board (1) is arranged in the box where the battery cell is located; A first connector (2) is arranged at one end of the PCB (1) extending along a first preset direction and is fixedly connected to the PCB (1); input terminals of the first connector (2) are electrically connected to the cell sampling harness in a one-to-one correspondence, and output terminals of the first connector (2) are fixedly connected to the PCB (1); the first preset direction is the length direction of the PCB (1); A second connector (3) is arranged at the other end of the PCB board (1) extending along the first preset direction, is arranged opposite to the first connector (2), and is fixedly connected to the PCB board (1); an input terminal of the second connector (3) is fixedly connected to the PCB board (1), and an output terminal of the second connector (3) is electrically connected to the BMS sampling harness in a one-to-one correspondence; A plurality of fuses (4) are arranged between the first connector (2) and the second connector (3), and are electrically connected in a one-to-one correspondence with the interface on the first connector (2) and an end adjacent to the second connector (3).

2. A sampling harness protection module according to claim 1, characterized in that: The edges of the PCB board (1) extending along the first preset direction are all provided with mounting holes (11), and rivets are embedded in the mounting holes (11); the rivets are detachably connected to the box where the battery core is located.

3. A sampling harness protection module according to claim 2, characterized in that: The first connector (2) and the second connector (3) both comprise a first body (100) and a plurality of pins (101); the first body (100) has a first end face (102) and a second end face (103) arranged opposite to each other along a first preset direction, the first end face (102) is provided with a card slot (104), the card slot (104) extends along the first preset direction and does not pass through the first body (100); a plurality of first through holes (105) are provided on the inner surface of the card slot (104) away from the first end face (102), the plurality of first through holes (105) are interconnected with the card slot (104); the plurality of pins (101) are provided with a plurality of first through holes (105) and the plurality of first through holes (105) are interconnected with the card slot (104); One end of the plurality of plug pins (101) is correspondingly embedded in the first through hole (105), and the other ends of the plurality of plug pins (101) extend respectively along the first preset direction and the direction close to the PCB board (1) and are attached to the surface of the PCB board (1); one end of the plurality of fuses (4) is electrically connected to the end of the plurality of plug pins (101) of the first connector (2) attached to the PCB board (1), and the other end is electrically connected to the end of the plurality of plug pins (101) of the second connector (3) attached to the PCB board (1); the extension length of the plurality of plug pins (101) in the card slot (104) does not exceed the depth of the card slot (104).

4. A sampling harness protection module according to claim 3, characterized in that: A plurality of fuses (4) are arranged along the surface of the PCB board (1), and adjacent fuses (4) are arranged in parallel and at equal intervals.

5. A sampling harness protection module according to claim 3, characterized in that: The surfaces of the plurality of fuses (4) are all provided with a transparent insulating material layer.

6. A sampling harness protection module according to claim 3, characterized in that: The first body (100) is symmetrically provided with a first boss (106), which extends along the axial direction of the fuse (4) and is adapted to the length of each of the plurality of pins (101) extending out of the first body (100).

7. A sampling harness protection module according to claim 3, characterized in that: The invention also comprises a third connector (5) and a fourth connector (6); the third connector (5) and the fourth connector (6) both comprise a second body (200); the second body (200) is provided with a plurality of through second through holes (201), and a metal sleeve (202) is provided in each of the plurality of second through holes (201); the shape of the metal sleeve (202) is adapted to the contour of the second through hole (201), and one end of each metal sleeve (202) is electrically connected to one end of a cell sampling harness or one end of a BMS sampling harness in a one-to-one correspondence; the other end of the metal sleeve (202) is matched and connected to a plurality of pins (101) in a one-to-one correspondence.

8. A sampling harness protection module according to claim 7, characterized in that: A second boss (203) and a third boss (204) protruding outward are arranged at the edge of the second body (200); a first groove (107) and a second groove (108) are correspondingly arranged on the surface of the first body (100); the first groove (107) and the second groove (108) are both connected to the card slot (104); the first groove (107) is adapted to the shape of the second boss (203); the second groove (108) is adapted to the shape of the third boss (204); the second boss (203), the third boss (204), the first groove (107) and the second groove (108) all extend along a first preset direction.

9. The sampling harness protection module according to claim 7, characterized in that: A flexible cardboard (205) is arranged on the second body (200), one end of the flexible cardboard (205) is fixedly connected to the second body (200), and the other end extends outwardly in a direction away from the pin (101), and a stop block (206) protruding outward is arranged on the surface of the flexible cardboard (205); a third groove (109) is correspondingly arranged on the first body (100), the third groove (109) is offset in a direction away from the PCB board (1), the contour of the third groove (109) is adapted to the contour of the flexible cardboard (205), a fourth groove (110) is arranged on the inner surface of the third groove (109) away from the PCB board (1), the third groove (109) is communicated with the card slot (104) and the fourth groove (110); the contour of the fourth groove (110) is adapted to the contour of the stop block (206).

10. A battery pack, wherein a plurality of battery cells are arranged inside, characterized in that: The battery pack is provided with a sampling harness protection module as described in any one of claims 1 to 9, and the cell sampling harnesses led out of each cell are electrically connected to the BMS sampling harnesses in a one-to-one correspondence through the sampling harness protection module.

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