High-voltage connector and battery pack comprising same

Abstract

The invention discloses a high-voltage connector and a battery pack comprising the same. The high-voltage connector includes: a housing; a first conductive core and a second conductive core; one end of a first insertion column of the first conductive core is used for being electrically connected to one battery module, and the other end of the first insertion column penetrates through the shell; one end of a second insertion column of the second conductive core is used for being electrically connected to another battery module, and the other end of the second insertion column penetrates through the shell; and the first connecting part of the first conductive core is in sliding connection with the second connecting part of the second conductive core. The battery pack comprises the high-voltage connector; at least two groups of battery modules, wherein each group of battery modules is provided with a connecting seat; and the first conductive core and the second conductive core are respectively inserted into the connecting seats of two adjacent battery modules to realize electric connection. According to the structure, the distance between the first conductive core and the second conductive core can be adjusted, so that the stable electric connection between the two battery modules is ensured, and meanwhile, good mounting flexibility can be achieved.

Description

[0001] This application is a divisional application of a Chinese patent application filed on July 27, 2017, with application number 2017106258909 and invention name “High-voltage connector and battery pack comprising the same”. Technical Field

[0002] The invention relates to a high voltage connector and a battery pack comprising the same. Background Art

[0003] The battery modules in the power battery pack of existing electric vehicles are generally connected by cables or rigid connectors and locked by screws. Cable connection allows the distance between the battery modules to deviate, but once the screws are loose, it will cause unsafe factors such as power failure and sparks at the connection; while rigid connectors require high installation accuracy of the position of each battery module and lack installation flexibility. Both connection methods are inconvenient to use. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defect that the connection method between battery modules in the prior art is inconvenient to use, and to provide a high-voltage connector and a battery pack containing the same.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] A high-voltage connector for electrical connection between two battery modules, the high-voltage connector comprising a housing, wherein the high-voltage connector further comprises:

[0007] A first conductive core and a second conductive core, wherein the first conductive core and the second conductive core are arranged opposite to each other;

[0008] The first conductive core includes a first plug post and a first connecting portion connected to each other, one end of the first plug post is used to be electrically connected to one of the battery modules, and the other end of the first plug post is inserted through the shell and connected to one end of the first connecting portion located in the shell;

[0009] The second conductive core comprises a second plug post and a second connecting portion connected to each other, one end of the second plug post is used to be electrically connected to another battery module, and the other end of the second plug post is passed through the shell and connected to one end of the second connecting portion located in the shell;

[0010] Preferably, a connecting hole with two through ends is opened in the second connecting part, and the connecting hole includes a first side wall and a second side wall arranged opposite to each other, and a top surface and a bottom wall connected between the first side wall and the second side wall and arranged opposite to each other; a connecting block is provided at the other end of the first connecting part, and the connecting block is inserted into the connecting hole from the other end of the second connecting part.

[0011] Preferably, the other end of the first connecting portion is slidably connected to the other end of the second connecting portion.

[0012] Preferably, the connecting block is provided with a connecting groove and a first elastic connecting member is provided in the connecting groove, and / or the outer surface of the first plug post and the outer surface of the second plug post are provided with annular grooves along the circumferential direction and a second elastic connecting member is provided in the annular groove; the first elastic connecting member is used to electrically connect the first connecting part and the second connecting part, and the second elastic connecting member is used to electrically connect the first plug post and one of the battery modules, and to electrically connect the second plug post and another battery module.

[0013] Preferably, the number of the connecting grooves is two, and the two connecting grooves are spaced apart along a moving direction in which the first connecting part is slidably disposed on the second connecting part.

[0014] Preferably, both the first elastic connecting member and the second elastic connecting member are conductive springs.

[0015] In the present technical solution, by providing a first elastic connector and a second elastic connector, the electrical connection between the first conductive core and the second conductive core, the electrical connection between the first conductive core and one of the battery modules, and the electrical connection between the second plug and another battery module can maintain a stable electrical connection even when vibrating up and down.

[0016] Preferably, both side surfaces of the connection block are inclined surfaces inclined toward the top, and the two side surfaces are respectively provided with a first protrusion extending toward the first side wall and a second protrusion extending toward the second side wall;

[0017] The second connection portion further includes a first limiting strip and a second limiting strip, both of which are located in the connection hole, and the first limiting strip is arranged on the surface of the first side wall and extends in the direction of the connection block, and the second limiting strip is arranged on the surface of the second side wall and extends in the direction of the connection block;

[0018] Among them, the top surface, the first side wall and the first limit strip form a first slide groove, the top surface, the second side wall and the second limit strip form a second slide groove, the first protrusion is slidably arranged in the first slide groove, the second protrusion is slidably arranged in the second slide groove, and the first slide groove is arranged opposite to the second slide groove, and the first protrusion is arranged opposite to the second protrusion.

[0019] In the present technical solution, the first protrusion is slidably arranged in the first slide groove, and the second protrusion is slidably arranged in the second slide groove, so that the sliding of the connecting block in the connecting hole is more stable and smooth, and the relative position between the first conductive core and the second conductive core can be adjusted more flexibly.

[0020] Preferably, a central axis of the first plug post forms a first angle with the plane where the first connecting portion is located; and a central axis of the second plug post forms a second angle with the plane where the second connecting portion is located.

[0021] Preferably, the side surfaces of the first connecting part and the second connecting part are both provided with abutment columns extending outwardly, and a positioning protrusion is provided on the inner wall of the shell at a position corresponding to the abutment column, and the abutment column is sleeved with an elastic member, one end of the elastic member is sleeved on the abutment column, and the other end of the elastic member is sleeved on the positioning protrusion and abuts against the inner wall of the shell.

[0022] In the technical solution, by providing the abutting column, the elastic member and the positioning protrusion, the first conductive core and the second conductive core can be relatively adjusted to a certain extent in the horizontal direction, and the installation is more flexible.

[0023] Preferably, the shell is made of insulating material, and includes a bottom box and a top cover that are snap-connected to each other; the bottom box includes a first part and a second part that are snap-connected to each other, the first conductive core is passed through the first part, and the second conductive core is passed through the second part.

[0024] The present invention also provides a battery pack, which is characterized in that the battery comprises:

[0025] A high voltage connector as described above;

[0026] At least two groups of battery modules, each group of battery modules is provided with a connecting seat;

[0027] The first conductive core and the second conductive core of the high-voltage connector are respectively inserted into the connection sockets of two adjacent groups of battery modules to achieve electrical connection.

[0028] The positive and progressive effects of the present invention are:

[0029] The structure of the present invention can adjust the distance between the first conductive core and the second conductive core, thereby ensuring a stable electrical connection between the two battery modules while having good installation flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a three-dimensional structural diagram of a high-voltage connector according to a preferred embodiment of the present invention.

[0031] Figure 2 This is a three-dimensional exploded structural diagram of a high-voltage connector according to a preferred embodiment of the present invention.

[0032] Figure 3 This is a front view of a high voltage connector according to a preferred embodiment of the present invention.

[0033] Figure 4 It is a bottom view of a high voltage connector according to a preferred embodiment of the present invention.

[0034] Figure 5 for Figure 4 Cross-sectional view along the AA direction.

[0035] Figure 6 It is a side view of the first conductive core and the second conductive core of a preferred embodiment of the present invention.

[0036] Figure 7 This is a three-dimensional structural diagram of a high-voltage connector according to a preferred embodiment of the present invention when it is inserted into a connection socket.

[0037] Figure 8 This is a front view of the high-voltage connector of a preferred embodiment of the present invention after being inserted into the connection socket.

[0038] Fig. 9 for Figure 8 Cross-sectional view along the BB direction.

[0039] Fig.10 FIG. 4 is a partial three-dimensional structural diagram of a battery pack according to a preferred embodiment of the present invention. Description of Reference Numerals

[0040] High voltage connector 1

[0041] Housing 10

[0042] Bottom box 11

[0043] Part 111

[0044] Part 2112

[0045] Positioning protrusion 113

[0046] Top cover 12

[0047] The first conductive core 20

[0048] First plug 21

[0049] First connection portion 22

[0050] Connection block 23

[0051] Connection slot 231

[0052] Side of connecting block 232

[0053] First bulge 2321

[0054] The second protrusion 2322

[0055] The second conductive core 30

[0056] Second plug 31

[0057] The second connection portion 32

[0058] Connection hole 33

[0059] First side wall 331

[0060] Top 332

[0061] Second side wall 333

[0062] Bottom wall 334

[0063] The first limit bar 341

[0064] Second limit strip 342

[0065] First chute 351

[0066] Second chute 352

[0067] The first elastic connecting member 41

[0068] The second elastic connecting member 42

[0069] Ring groove 51

[0070] Butt column 61

[0071] Elastic member 70

[0072] Battery module 9

[0073] Connecting seat 91

[0074] Moving direction D DETAILED DESCRIPTION

[0075] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0076] like Figures 1 to 10As shown, this embodiment provides a high-voltage connector 1 for electrical connection between two battery modules 9, and the high-voltage connector 1 includes: a housing 10, a first conductive core 20 and a second conductive core 30. The housing 10 is made of insulating material, and includes a bottom box 11 and a top cover 12 that are snap-connected to each other; the bottom box 11 includes a first part 111 and a second part 112 that are snap-connected to each other, the first conductive core 20 is inserted through the first part 111, and the second conductive core 30 is inserted through the second part 112.

[0077] The first conductive core 20 and the second conductive core 30 are arranged opposite to each other. The first conductive core 20 includes a first plug 21 and a first connecting portion 22 connected to each other. One end of the first plug 21 is used to electrically connect to one of the battery modules 9. The other end of the first plug 21 is inserted into the shell 10 and connected to one end of the first connecting portion 22 located in the shell 10. The second conductive core 30 includes a second plug 31 and a second connecting portion 32 connected to each other. One end of the second plug 31 is used to electrically connect to another battery module 9. The other end of the second plug 31 is inserted into the shell 10 and connected to one end of the second connecting portion 32 located in the shell 10. The other end of the first connecting portion 22 is slidably connected to the other end of the second connecting portion 32. In this way, the distance between the first conductive core 20 and the second conductive core 30 can be adjusted by slidingly connecting the other end of the first connecting portion 22 to the other end of the second connecting portion 32, so that while ensuring a stable electrical connection between the two battery modules 9, it can have good installation flexibility.

[0078] A connecting hole 33 with two through ends is opened in the second connecting portion 32, and the connecting hole 33 includes a first side wall 331 and a second side wall 333 arranged opposite to each other, and a top surface 332 and a bottom wall 334 connected between the first side wall 331 and the second side wall 333 and arranged opposite to each other; a connecting block 23 is provided at the other end of the first connecting portion 22, and the connecting block 23 is inserted into the connecting hole 33 from the other end of the second connecting portion 32.

[0079] The connection block 23 is provided with a connection groove 231 and a first elastic connector 41 is provided in the connection groove 231, and / or the outer surface of the first plug column 21 and the outer surface of the second plug column 31 are provided with an annular groove 51 along the circumferential direction and a second elastic connector 42 is provided in the annular groove 51; the first elastic connector 41 is used to electrically connect the first connection part 22 and the second connection part 32, and the second elastic connector 42 is used to electrically connect the first plug column 21 and one of the battery modules 9, and to electrically connect the second plug column 31 and another battery module 9. In this embodiment, the first elastic connector 41 and the second elastic connector 42 are both conductive springs. The number of the connection grooves 231 is two, and the two connection grooves 231 are spaced apart along the moving direction of the first connection part 22 sliding on the second connection part 32. In other embodiments, the number of the connection grooves 231 can also be three, or other numbers. In this way, by setting the first elastic connector 41 and the second elastic connector 42, the electrical connection between the first conductive core 20 and the second conductive core 30, the electrical connection between the first conductive core 20 and one of the battery modules 9, and the electrical connection between the second plug 31 and another battery module 9 are realized, and a stable electrical connection can be maintained even when vibrating up and down.

[0080] Both side surfaces 232 of the connection block 23 are inclined surfaces inclined toward the top, and the two side surfaces 232 are respectively provided with a first protrusion 2321 extending toward the first side wall 331 and a second protrusion 2322 extending toward the second side wall 333. The second connection portion 32 further includes a first limiting strip 341 and a second limiting strip 342, both of which are located in the connection hole 33, and the first limiting strip 341 is provided on the surface of the first side wall 331 and extends toward the connection block 23, and the second limiting strip 342 is provided on the surface of the second side wall 333 and extends toward the connection block 23. The top surface 332, the first side wall 331 and the first limiting strip 341 are surrounded to form a first slide groove 351, the top surface 332, the second side wall 333 and the second limiting strip 342 are surrounded to form a second slide groove 352, the first protrusion 2321 is slidably disposed in the first slide groove 351, the second protrusion 2322 is slidably disposed in the second slide groove 352, and the first slide groove 351 and the second slide groove 352 are arranged oppositely, and the first protrusion 2321 and the second protrusion 2322 are arranged oppositely. In this way, by sliding the first protrusion 2321 in the first slide groove 351 and the second protrusion 2322 in the second slide groove 352, the sliding of the connecting block 23 in the connecting hole 33 is more stable and smooth, and the relative position between the first conductive core 20 and the second conductive core 30 can be adjusted more flexibly.

[0081] The central axis of the first plug post 21 forms a first angle with the plane where the first connection portion 22 is located; the central axis of the second plug post 31 forms a second angle with the plane where the second connection portion 32 is located. The angles of the first angle and the second angle are set according to actual needs and can be 90 degrees, 80 degrees, etc.

[0082] The side of the first connecting part 22 and the side of the second connecting part 32 are both extended outward with abutment columns 61, and a positioning protrusion 113 is provided on the inner wall of the housing 10 at a position corresponding to the abutment column 61. The abutment column 61 is sleeved with an elastic member 70, one end of the elastic member 70 is sleeved on the abutment column 61, and the other end of the elastic member 70 is sleeved on the positioning protrusion 113 and abuts against the inner wall of the housing 10. Preferably, the elastic member 70 is a spring. In this way, by providing the abutment column 61, the elastic member 70 and the positioning protrusion 113, the first conductive core 20 and the second conductive core 30 can be relatively adjusted in the horizontal direction to a certain extent, and the installation is more flexible. In this embodiment, the central axis of the abutment column 61 is provided with a third angle with the moving direction D of the first connecting part 22 slidingly arranged on the second connecting part 32. The angle of the third angle is set according to actual needs, and can be 90 degrees, 80 degrees, etc.

[0083] like Fig.10 As shown, this embodiment also provides a battery pack, which includes: the high-voltage connector 1 as described above and at least two groups of battery modules 9. Each group of battery modules 9 is provided with a connection seat 91. Among them, the first conductive core 20 and the second conductive core 30 of the high-voltage connector 1 are used to be respectively inserted into the connection seats 91 of two adjacent groups of battery modules 9 to achieve electrical connection.

[0084] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A high-voltage connector for electrical connection between two battery modules, the high-voltage connector comprising a housing, characterized in that: The high voltage connector also includes: A first conductive core and a second conductive core, wherein the first conductive core and the second conductive core are arranged opposite to each other; The first conductive core includes a first plug post and a first connecting portion connected to each other, one end of the first plug post is used to be electrically connected to one of the battery modules, and the other end of the first plug post is inserted through the shell and connected to one end of the first connecting portion located in the shell; The second conductive core comprises a second plug post and a second connecting portion connected to each other, one end of the second plug post is used to be electrically connected to another battery module, and the other end of the second plug post is passed through the shell and connected to one end of the second connecting portion located in the shell; A connecting hole with two through ends is opened in the second connecting part, and the connecting hole includes a first side wall and a second side wall arranged opposite to each other, and a top surface and a bottom wall connected between the first side wall and the second side wall and arranged opposite to each other; a connecting block is provided at the other end of the first connecting part, and the connecting block is inserted into the connecting hole from the other end of the second connecting part.

2. The high voltage connector according to claim 1, characterized in that: The other end of the first connection portion is slidably connected to the other end of the second connection portion.

3. The high voltage connector according to claim 2, characterized in that: The connecting block is provided with a connecting groove and a first elastic connecting member is provided in the connecting groove, and / or the outer surface of the first plug post and the outer surface of the second plug post are provided with annular grooves along the circumferential direction and a second elastic connecting member is provided in the annular groove; the first elastic connecting member is used to electrically connect the first connecting part and the second connecting part, and the second elastic connecting member is used to electrically connect the first plug post and one of the battery modules, and to electrically connect the second plug post and another battery module.

4. The high voltage connector according to claim 3, characterized in that: The number of the connection grooves is two, and the two connection grooves are spaced apart along a moving direction in which the first connection part is slidably arranged on the second connection part.

5. The high voltage connector according to claim 3, characterized in that: The first elastic connecting member and the second elastic connecting member are both conductive springs.

6. The high voltage connector according to claim 1, characterized in that: Both sides of the connection block are inclined surfaces inclined toward the top, and the two sides are respectively provided with a first protrusion extending toward the first side wall and a second protrusion extending toward the second side wall; The second connection portion further includes a first limiting strip and a second limiting strip, both of which are located in the connection hole, and the first limiting strip is arranged on the surface of the first side wall and extends in the direction of the connection block, and the second limiting strip is arranged on the surface of the second side wall and extends in the direction of the connection block; Among them, the top surface, the first side wall and the first limit strip form a first slide groove, the top surface, the second side wall and the second limit strip form a second slide groove, the first protrusion is slidably arranged in the first slide groove, the second protrusion is slidably arranged in the second slide groove, and the first slide groove is arranged opposite to the second slide groove, and the first protrusion is arranged opposite to the second protrusion.

7. The high voltage connector according to claim 1, characterized in that: A central axis of the first plug post forms a first angle with the plane where the first connecting portion is located; a central axis of the second plug post forms a second angle with the plane where the second connecting portion is located.

8. The high voltage connector according to claim 1, characterized in that: Abutment columns are extended outward from the side surfaces of the first connection part and the second connection part, and positioning protrusions are provided on the inner wall of the shell at positions corresponding to the abutment columns. The abutment columns are sleeved with elastic members, one end of the elastic member is sleeved on the abutment columns, and the other end of the elastic member is sleeved on the positioning protrusions and abuts against the inner wall of the shell.

9. The high voltage connector according to claim 1, characterized in that: The shell is made of insulating material, and includes a bottom box and a top cover that are snap-connected to each other; the bottom box includes a first part and a second part that are snap-connected to each other, the first conductive core is passed through the first part, and the second conductive core is passed through the second part.

10. A battery pack, characterized in that: The battery comprises: A high voltage connector as claimed in any one of claims 1 to 9; At least two groups of battery modules, each group of battery modules is provided with a connecting seat; The first conductive core and the second conductive core of the high-voltage connector are respectively inserted into the connection sockets of two adjacent groups of battery modules to achieve electrical connection.

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