Integrated busbar assembly battery pack

Abstract

The utility model discloses an integrated busbar subassembly and battery pack, including PCB board, a plurality of nickel strap and clearance position, the PCB board extends along the first direction, along the both sides of second direction are equipped with a plurality of connecting pin. The plurality of connecting pins are arranged at intervals along a first direction, and each connecting pin extends along a second direction. And the plurality of nickel straps are arranged above the PCB and are in one-to-one correspondence with the plurality of connecting pins. And each connecting pin is provided with a first positioning hole and a second positioning hole which are arranged at an interval along a second direction and are used for being connected with a nickel strap in an inserting manner. The receding positions are arranged at the connecting position of the first positioning hole and the first inserting part and the connecting position of the second positioning hole and the second inserting part respectively, so that after the nickel strap is inserted, burrs of the nickel strap are contained to a certain degree, and the yield of subsequent welding at the connecting positions is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to an integrated busbar assembly battery pack. Background Art

[0002] In the prior art, a CCS lithium battery is a lithium battery module equipped with CCS. Each lithium battery module contains a CCS module (Cells Contact System). The CCS module integrates the connection and control of the lithium battery module, and the integrated busbar is a part of the CCS module. The integrated busbar is a highly integrated battery signal acquisition component, which is composed of signal acquisition components (FPC, PCB, FFC, etc.), plastic structural parts, nickel strips, etc., and is connected into a whole through processes such as hot pressing or riveting to achieve high-voltage series and parallel connection of battery cells, as well as battery temperature sampling and battery cell voltage sampling functions.

[0003] When assembling the integrated busbar, due to the requirements on the width and structure of the nickel strip as well as the overall current capacity, in order to ensure the automatic welding yield of the nickel strip and the PCB board, the size of the nickel strip positioning claw and the size of the corresponding positioning hole of the PCB board need to be strictly limited. However, as stated in the manual Figure 2 and Figure 3 As shown, the first connector 30 and the second connector 31 of the nickel strip 3 are correspondingly inserted into the first positioning hole 21 and the second positioning hole 22. As the number of products produced increases, the stamping die will wear out. When the nickel strip 3 is processed and formed, burrs are generated on the edges of the first connector 30 and the second connector 31, which affects the assembly with the corresponding PCB board positioning holes and causes a loss in welding yield. Utility Model Content

[0004] In order to overcome the above shortcomings, the purpose of the utility model is to provide an integrated busbar assembly to solve the problem of burrs on the edge of the nickel strip mentioned in the above background technology, which affects the assembly with the corresponding PCB board positioning holes.

[0005] In order to achieve the above objectives, the technical solution adopted by the utility model is an integrated busbar assembly, comprising:

[0006] The PCB board extends along a first direction, and is provided with a plurality of connecting pins on both sides along a second direction. The plurality of connecting pins are arranged at intervals along the first direction, and each of the connecting pins extends along the second direction, and the first direction is perpendicular to the second direction.

[0007] A plurality of nickel strips are arranged above the PCB board and are arranged corresponding to the plurality of connecting pins one by one.

[0008] Each of the connecting pins comprises a first positioning hole and a second positioning hole spaced apart along the second direction, and is used for being plugged and fixed with the nickel strip.

[0009] The avoidance positions are respectively arranged at the connection between the first positioning hole and the first plug-in portion, and at the connection between the second positioning hole and the second plug-in portion.

[0010] The integrated busbar assembly provided by the utility model increases the avoidance position of the nickel strip burr in the first positioning hole and the second positioning hole, so that the nickel strip can contain the burr of the nickel strip to a certain extent after being inserted, so as to ensure the yield of subsequent welding at the connection.

[0011] In some embodiments, each of the nickel strips extends along the first direction, and the first connector and the second connector are provided on both sides along the second direction. The first connector and the second connector both extend along the third direction. The first connector is arranged corresponding to the hole wall of the first positioning hole close to the second positioning hole along the second direction, and the second connector is arranged corresponding to the hole wall of the second positioning hole close to the first positioning hole along the second direction, so as to enable the nickel strip to be plugged and fixed to the PCB board.

[0012] By adopting the above technical solution, the first plug-in portion and the second plug-in portion of each nickel strip are plugged into the first positioning hole and the second positioning hole.

[0013] In some embodiments, the air avoidance position includes a first air avoidance groove and a second air avoidance groove. The first air avoidance groove is respectively provided at two ends of the hole wall on the other side of the first positioning hole along the second direction along the first direction, and the second air avoidance groove is respectively provided at two ends of the hole wall on the other side of the second positioning hole along the second direction along the first direction. The first air avoidance groove and each of the second air avoidance grooves extend along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0014] By adopting the above technical solution, the first air avoidance groove and the second air avoidance groove are respectively arranged in the first positioning hole and the second positioning hole on the opposite sides of the nickel strip in contact, and the positions where burrs are generated on the edges of the first connector and the second connector correspond to the positions of the first air avoidance groove and the second air avoidance groove, thereby playing a role in containing the burrs.

[0015] In some embodiments, the air avoidance position further includes an inner concave portion, and the inner concave portion is respectively provided at two ends of the top of the first connector along the first direction and at two ends of the top of the second connector along the first direction.

[0016] By adopting the above technical solution, a recessed portion is provided at the edge of the first connector and the second connector, that is, the nickel strip is hollowed out in the inner direction, and the position of the recessed portion is the same as the position where the burr is generated, thereby avoiding the generation of burrs at the edge.

[0017] In some embodiments, the first connector and the second connector are both formed by puncturing and bending by a stamping die.

[0018] Each of the inner concave portions is formed by punching the punching die, and the punching action is located before the piercing and bending action.

[0019] By adopting the above technical solution, the processing technology of the first connector and the second connector of the nickel strip is changed from puncturing to first stamping and then bending. After the process is changed, no burrs are generated at the position of the inner concave part, thereby ensuring the subsequent welding yield of the two.

[0020] In some embodiments, the first connector, the second connector, and the connecting pin are fixed by welding.

[0021] By adopting the above technical solution, after the first connector and the second connector are inserted into the first positioning hole and the second positioning hole, the nickel strip is fixed to the PCB board by welding.

[0022] In some embodiments, the integrated busbar assembly further comprises a support member, and the PCB board is arranged on the top of the support member.

[0023] The above technical solution is adopted. The support member in this solution is a blister member. The blister member is light in weight and has excellent impact resistance. The blister member is made of insulating material and can provide insulation protection while providing support for the PCB board and multiple nickel strips.

[0024] Another technical solution adopted by the present invention is a battery pack, comprising a plurality of battery cells and an integrated busbar assembly described in any one of the above-mentioned embodiments. The plurality of battery cells are arranged below a support. The plurality of nickel strips of the integrated busbar assembly are electrically connected to the battery poles of the plurality of battery cells in a one-to-one correspondence. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a stereoscopic diagram of an embodiment of an integrated busbar assembly of the utility model, wherein the first connector and the second connector in the connecting pins of the upper half of the integrated busbar assembly are not provided with the first and the second air avoidance grooves, while the first connector and the second connector in the connecting pins of the lower half are provided with the first and the second air avoidance grooves; the nickel strip on the left side is provided with an inner recess, while the nickel strip on the right side is not provided with an inner recess.

[0026] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0027] Figure 3 for Figure 1 The enlarged view of point B in the middle;

[0028] Figure 4 for Figure 1 Enlarged view of point C in the middle;

[0029] Figure 5 for Figure 1 The enlarged view of point D in the middle;

[0030] In the figure:

[0031] 1-integrated busbar assembly; 2-PCB board; 20-connecting pin; 21-first positioning hole; 22-second positioning hole; 23-first air avoidance groove; 24-second air avoidance groove; 3-nickel strip; 30-first connector; 31-second connector; 32-inner recess. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0033] refer to Figure 1~Figure 2 , Figure 1 A stereoscopic view of an integrated busbar assembly 1 provided by an embodiment of the utility model is shown, wherein the first plug-in portion 30 and the second plug-in portion 31 in the connecting pin 20 of the upper part of the integrated busbar assembly 1 are not provided with the first avoidance groove 23 and the second avoidance groove 24, and the first plug-in portion 30 and the second plug-in portion 31 in the connecting pin 20 of the lower part are provided with the first avoidance groove 23 and the second avoidance groove 24; the nickel strip 3 on the left side is provided with an inner recess 32, and the nickel strip 3 on the right side is not provided with the inner recess 32; Figure 2 for Figure 1 The enlarged view of point A in the middle; Figure 3 for Figure 1 The enlarged view of point B in the middle; Figure 4 for Figure 1 Enlarged view of point C in the middle; Figure 5 for Figure 1 Enlarged view of point D in the middle.

[0034] like Figure 1~Figure 5 As shown, the technical solution provided by the present application is an integrated busbar assembly 1, including a PCB board 2, a plurality of nickel strips 3 and a clearance position, wherein the PCB board 2 is arranged along a first direction ( Figure 1 X direction) and extends along the second direction ( Figure 1A plurality of connecting pins 20 are provided on both sides of the PCB board 2 (shown in the Y direction). The plurality of connecting pins 20 are arranged at intervals along the first direction, and each connecting pin 20 extends along the second direction, and the first direction is perpendicular to the second direction. A plurality of nickel strips 3 are arranged above the PCB board 2, and are arranged one by one corresponding to the plurality of connecting pins 20. Each connecting pin 20 includes a first positioning hole 21 and a second positioning hole 22 arranged at intervals along the second direction, which are used for plugging and fixing with the nickel strip 3. The air avoidance position is respectively provided at the connection between the first positioning hole 21 and the first plug-in part 30, and at the connection between the second positioning hole 22 and the second plug-in part 31, for accommodating the burrs of the nickel strip 3.

[0035] The integrated busbar assembly 1 provided in the present application increases a clearance position for the burrs of the nickel strip 3 in the first positioning hole 21 and the second positioning hole 22, so that after the nickel strip 3 is inserted, the burrs of the nickel strip 3 are contained to a certain extent to ensure the yield of subsequent welding at the connection.

[0036] In some embodiments, reference Figure 1~Figure 5 Each nickel strip 3 extends along the first direction, and a first plug part 30 and a second plug part 31 are provided on both sides along the second direction. The first plug part 30 and the second plug part 31 both extend along the third direction. The first plug part 30 is arranged corresponding to the hole wall of the first positioning hole 21 close to the second positioning hole 22 along the second direction, and the second plug part 31 is arranged corresponding to the hole wall of the second positioning hole 22 close to the first positioning hole 21 along the second direction, so as to enable the nickel strip 3 to be plugged and fixed to the PCB board 2.

[0037] Exemplarily, the first connector 30 and the second connector 31 of each nickel strip 3 are plugged into the first positioning hole 21 and the second positioning hole 22 .

[0038] In some embodiments, reference Figure 1~Figure 5 The avoidance position includes a first avoidance groove 23 and a second avoidance groove 24. The first avoidance groove 23 is respectively arranged at two ends of the hole wall of the other side of the first positioning hole 21 along the second direction along the first direction, and the second avoidance groove 24 is respectively arranged at two ends of the hole wall of the other side of the second positioning hole 22 along the second direction along the first direction. The first avoidance groove 23 and each second avoidance groove 24 are arranged along the third direction ( Figure 1 The first direction, the second direction and the third direction are perpendicular to each other.

[0039] Exemplarily, the first air avoidance groove 23 and the second air avoidance groove 24 are respectively arranged on the opposite sides of the first positioning hole 21 and the second positioning hole 22 in contact with the nickel strip 3, and the positions where burrs are generated on the edges of the first connector 30 and the second connector 31 correspond to the positions of the first air avoidance groove 23 and the second air avoidance groove 24, thereby playing a role in containing the burrs.

[0040] In some embodiments, reference Figure 1~Figure 5The avoidance position further includes an inner concave portion 32. The inner concave portions 32 are respectively arranged at two ends of the top of the first plug-in portion 30 along the first direction, and at two ends of the top of the second plug-in portion 31 along the first direction.

[0041] Exemplarily, by providing an inner recess 32 at the edges of the first connector 30 and the second connector, that is, hollowing out the nickel strip 3 inwardly, the position of the inner recess 32 is the same as the position where the burr is generated, thereby avoiding the generation of burrs at the edge.

[0042] Furthermore, the configuration of the first avoidance groove 23, the second avoidance groove 24 and the inner recess 32 can prevent the burrs from affecting the corresponding assembly of the nickel sheet and the positioning holes of the PCB board 2. The two configuration methods can be implemented in the same solution or in two solutions respectively.

[0043] In some embodiments, the first connector 30 and the second connector 31 are both formed by puncturing and bending by a stamping die.

[0044] Each inner concave portion 32 is formed by punching a punching die, and the punching action is located before the action of piercing the bend.

[0045] Exemplarily, the processing technology of the first connector 30 and the second connector 31 of the nickel strip 3 is changed from puncturing to stamping first and then bending. After the process is changed, no burrs are generated at the position of the inner recess 32 formed, thereby ensuring the subsequent welding yield of the two.

[0046] In some embodiments, the first connector 30 and the second connector 31 are fixed to the connecting pin 20 by welding.

[0047] Exemplarily, after the first connector 30 and the second connector 31 are inserted into the first positioning hole 21 and the second positioning hole 22 , the nickel strip 3 is fixed to the PCB board 2 by welding.

[0048] In some embodiments, the integrated busbar assembly 1 further comprises a support member. The PCB board 2 is arranged on the top of the support member.

[0049] Exemplarily, the support member in this solution is a blister member, which is light in weight and has excellent impact resistance. The blister member is made of insulating material and can provide support for the PCB board 2 and multiple nickel strips 3 while providing insulation protection.

[0050] Another technical solution provided by the present application is a battery pack, comprising a plurality of battery cells and an integrated busbar assembly 1 as described in any one of the above-mentioned embodiments. The plurality of battery cells are arranged below the support. The plurality of nickel strips 3 of the integrated busbar assembly 1 are electrically connected to the battery poles of the plurality of battery cells in a one-to-one correspondence.

[0051] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. An integrated busbar assembly, characterized in that: include: A PCB board extending along a first direction, with a plurality of connecting pins disposed on both sides along a second direction; the plurality of connecting pins are arranged at intervals along the first direction, each of the connecting pins extends along the second direction, and the first direction is perpendicular to the second direction; A plurality of nickel strips are disposed above the PCB board and are arranged one-to-one corresponding to the plurality of connecting pins; Each of the connecting pins comprises a first positioning hole and a second positioning hole spaced apart along the second direction, and is used for being plugged and fixed with the nickel strip; The avoidance positions are respectively arranged at the connection between the first positioning hole and the first plug-in portion, and at the connection between the second positioning hole and the second plug-in portion.

2. The integrated busbar assembly according to claim 1, characterized in that: Each of the nickel strips extends along the first direction, and the first connector and the second connector are provided on both sides along the second direction; the first connector and the second connector both extend along the third direction; the first connector is arranged corresponding to the hole wall of the first positioning hole along the second direction close to the second positioning hole, and the second connector is arranged corresponding to the hole wall of the second positioning hole along the second direction close to the first positioning hole, so as to enable the nickel strip to be plugged and fixed to the PCB board.

3. The integrated busbar assembly according to claim 2, characterized in that: The air avoidance position includes a first air avoidance groove and a second air avoidance groove; the first air avoidance groove is respectively arranged at two ends of the hole wall on the other side of the first positioning hole along the second direction along the first direction, and the second air avoidance groove is respectively arranged at two ends of the hole wall on the other side of the second positioning hole along the second direction along the first direction; the first air avoidance groove and each of the second air avoidance grooves extend along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

4. The integrated busbar assembly according to claim 2, characterized in that: The avoidance position also includes an inner concave portion; the inner concave portion is respectively arranged at two ends of the top of the first connector along the first direction, and at two ends of the top of the second connector along the first direction.

5. The integrated busbar assembly according to claim 2, characterized in that: The first connector and the second connector are both formed by puncturing and bending by a stamping die.

6. The integrated busbar assembly according to claim 4, characterized in that: Each of the inner concave portions is formed by punching a punching die, and the punching action is located before the action of piercing the bend.

7. The integrated busbar assembly according to claim 2, characterized in that: The first plug-in portion, the second plug-in portion and the connecting pin are all fixed by welding.

8. The integrated busbar assembly according to claim 1, characterized in that: It also includes a support member; the PCB board is arranged on the top of the support member.

9. A battery pack, characterized in that: It comprises a plurality of groups of battery cells and an integrated busbar assembly as described in any one of claims 1 to 7; the plurality of groups of battery cells are arranged below a support; a plurality of nickel strips of the integrated busbar assembly are electrically connected to the battery cell poles of the plurality of groups of battery cells in a one-to-one correspondence.

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