Battery welding preassembling structure and battery module

Abstract

The utility model provides a battery welding preassembling structure and a battery module. The battery welding preassembling structure comprises a battery cell support, a connecting piece and a signal line, the signal line is arranged on the battery cell support, and the outer side of the battery cell support is provided with a guide connection surface; a plurality of mounting hole sites are formed in the guide connection surface; the connecting sheet is mounted on the guide connection surface; a clamping and embedding groove and a wire clamping opening are formed in the edge of the guide connection surface of the battery cell bracket, and the wire clamping opening is communicated with the clamping and embedding groove; the end part of the connecting sheet is close to the edge of the guide connecting surface and is bent to form a signal acquisition lug; the signal acquisition lug is arranged in the clamping and embedding groove; the guide connection end of the signal line is clamped in the line clamping opening and extends to abut against the face, away from the guide connection face, of the signal collection lug, friction between the guide connection end of the signal line and the signal collection lug is increased, and therefore the situation that the signal line slides and shakes on the signal collection lug can be effectively reduced, and the welding yield and the welding efficiency are improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of power batteries, and in particular to a battery welding pre-assembly structure and a battery module. Background Art

[0002] With the widespread use of electric vehicles, the market demand for power batteries has surged. To ensure the safety of battery modules, it is usually necessary to weld signal lines to each electrode connector. The signal lines can monitor the voltage of the battery cells in the battery module, avoid overcharging or discharging, and ensure the safe use of the battery module. Currently, considering the large number of welding points between signal lines and electrode connectors in a single battery module, most manufacturers have begun to use automated welding methods, such as the equipment described in CN209439651U.

[0003] However, since the machine moves more violently and has lower welding flexibility than manual labor during the welding process, the signal line may slip and shake on the electrode connecting piece, making it difficult to weld the signal line and the electrode connecting piece firmly together, resulting in low welding yield and affecting the efficiency of automated welding. Utility Model Content

[0004] The purpose of the present disclosure is to overcome the deficiencies in the prior art and to provide a battery welding pre-assembly structure and a battery module with high welding yield and fast automated welding speed.

[0005] The purpose of this disclosure is achieved through the following technical solutions:

[0006] A battery welding pre-assembly structure includes a cell holder, a connecting piece, and a signal line. The signal line is arranged on the cell holder. The cell holder is used to install and fix a plurality of cell units. The outer side of the cell holder has a conductive surface. The conductive surface is provided with a plurality of mounting holes. Each mounting hole is used to pass an electrode of the cell unit so that each cell unit is electrically connected to the connecting piece. The connecting piece is installed on the conductive surface to connect the cell units in series and parallel.

[0007] The battery cell holder is provided with a locking groove and a wire clamping port at the edge of the conductive surface, and the wire clamping port is connected to the locking groove; the end of the connecting piece is close to the edge of the conductive surface and is bent to form a signal collection ear; the signal collection ear is arranged in the locking groove; the conductive end of the signal line is clamped in the wire clamping port and extends to press against the side of the signal collection ear facing away from the conductive surface.

[0008] In one embodiment, the line holding port includes a guide holding cavity and an arc-shaped cavity that are connected to each other. The arc-shaped cavity is close to the signal collection ear, and the guide holding cavity extends outward from the battery cell holder to form an entrance.

[0009] In one embodiment, the guide cavity gradually narrows from the arc-shaped cavity toward the entrance.

[0010] In one embodiment, the line-locking port is opened on the slot wall of the embedding slot, and the slot wall of the embedding slot is provided with stop blocks on both sides of the line-locking port, and each of the stop blocks is opposite to the signal collecting ear.

[0011] In one embodiment, a positioning pile is protruding from the battery cell bracket, and an alignment hole is opened on the connecting piece; the positioning pile cooperates with the alignment hole.

[0012] In one embodiment, a plurality of linear grooves are provided on the connecting plate around the alignment hole; each of the linear grooves is connected to the alignment hole, and a stop position is formed between two adjacent linear grooves; the positioning pile is passed through the alignment hole and is held in the stop position.

[0013] In one embodiment, a plurality of retaining grooves are spaced apart on the peripheral wall of the positioning pile, and each retaining position is retained in one of the retaining grooves.

[0014] In one embodiment, the number of the wire holding ports and the number of the signal lines are both multiple, and the multiple signal lines are arranged side by side to form a wire harness; the multiple wire holding ports are arranged on one side of the wire harness; in the wire harness, the conductive end of each signal line is close to and clamped at the corresponding wire holding port.

[0015] A battery module comprises a plurality of battery cells and a battery welding pre-installed structure according to any one of the above embodiments; each of the battery cells is installed in one of the installation holes.

[0016] In one embodiment, the battery module includes at least two stacked battery welding pre-assembled structures; the cell supports of two adjacent battery welding pre-assembled structures are matched with each other in a concave-convex manner.

[0017] Compared with the prior art, the present disclosure has at least the following advantages:

[0018] The above-mentioned battery welding pre-installed structure, since the signal collection ear is arranged in the card-embedded groove, the position of the signal collection ear can be limited by the card-embedded groove, and the conducting end of the signal line is clamped by the card-line opening, so that the conducting end of the signal line can be constrained, so that it can be more firmly extended and pressed against the side of the signal collection ear away from the conducting surface, thereby increasing the friction between the conducting end of the signal line and the signal collection ear, and stabilizing the signal collection ear in the card-embedded groove. This can effectively reduce the relative slippage between the signal line and the signal collection ear, so that the machine can accurately and firmly automatically weld the signal collection ear and the conducting end of the signal line, and ultimately improve the welding yield and welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a schematic structural diagram of a battery module according to an embodiment of the present disclosure;

[0021] Figure 2 for Figure 1 A partial enlarged view shown in the middle;

[0022] Figure 3 for Figure 1 A partially enlarged view of the structure of the battery module shown;

[0023] Figure 4 for Figure 1 A partial enlarged view of the alignment hole on the connecting piece shown;

[0024] Figure 5 for Figure 1 A side view of the battery module shown;

[0025] Figure 6 for Figure 1 A partial cross-sectional view of the battery module shown.

[0026] Figure numerals: 10, battery module; 110, battery cell bracket; 1110, conductive surface; 1120, embedding groove; 1121, stop block; 1130, wire clamping port; 1131, guide clamping cavity; 1132, arc-shaped cavity; 1133, entrance; 1140, positioning pile; 120, connecting piece; 1210, signal collection ear; 1220, alignment hole; 1230, linear groove; 1231, stop position; 13a, wiring harness; 130, signal line; 1310, conductive terminal; 200, battery cell; 300, plug-in post; 400, mating hole. DETAILED DESCRIPTION

[0027] To facilitate understanding of the present disclosure, a more comprehensive description of the present disclosure will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present disclosure. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure pertains. The terms used herein in the specification of this disclosure are intended only to describe specific embodiments and are not intended to limit this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] In order to better understand the technical solutions and beneficial effects of the present disclosure, the present disclosure is further described in detail below with reference to specific embodiments:

[0031] like Figure 1 and Figure 2 As shown, a battery welding pre-assembly structure of an embodiment includes a cell holder 110, a connecting piece 120 and a signal line 130. The signal line 130 is arranged on the cell holder 110. The cell holder 110 is used to install and fix a plurality of cell units 200. The outer side of the cell holder 110 has a conductive surface 1110. A plurality of mounting holes are opened on the conductive surface 1110. Each mounting hole is used to pass an electrode of a cell unit 200 so that each cell unit 200 is electrically connected to the connecting piece 120. The connecting piece 120 is installed on the conductive surface 1110. The battery cells 200 are connected in series and in parallel; the battery cell holder 110 is provided with a locking groove 1120 and a wire clamping opening 1130 at the edge of the conductive surface 1110, and the wire clamping opening 1130 is connected to the locking groove 1120; the end of the connecting piece 120 is close to the edge of the conductive surface 1110 and is bent to form a signal collection ear 1210; the signal collection ear 1210 is arranged in the locking groove 1120; the conductive end 1310 of the signal line 130 is clamped in the wire clamping opening 1130 and extends to press against the side of the signal collection ear 1210 facing away from the conductive surface 1110.

[0032] It can be understood that since the signal collecting ear 1210 is arranged in the locking groove 1120, the position of the signal collecting ear 1210 can be limited by the locking groove 1120, and the conductive end 1310 of the signal line 130 is clamped by the wire clamping mouth 1130, so that the conductive end 1310 of the signal line 130 can be constrained, so that it can be more firmly extended to press against the side of the signal collecting ear 1210 away from the conductive surface 1110, thereby increasing the friction between the conductive end 1310 of the signal line 130 and the signal collecting ear 1210, and making the signal collecting ear 1210 stable in the locking groove 1120. This can effectively reduce the relative slippage of the signal line 130 and the signal collecting ear 1210, so that the machine can accurately and firmly automatically weld the signal collecting ear 1210 and the conductive end 1310 of the signal line 130, and ultimately improve the welding yield and welding efficiency.

[0033] Combine Figure 2 and Figure 3 As shown, in one embodiment, the line clamping port 1130 includes a connected guide clamping cavity 1131 and an arc-shaped cavity 1132 . The arc-shaped cavity 1132 is close to the signal collection ear 1210 , and the guide clamping cavity 1131 extends outward from the battery cell holder 110 to form an entrance 1133 . It can be understood that since the guide card cavity 1131 extends outside the battery cell holder 110 to form the entrance 1133, when the signal line 130 is installed, by pushing the conducting end 1310 of the signal line 130 from the entrance 1133, the conducting end 1310 of the signal line 130 can move into the arc-shaped cavity 1132 under the guidance of the guide card cavity 1131, and the arc-shaped cavity 1132 is close to the signal collection ear 1210, so that the conducting end 1310 of the signal line 130 can directly approach and press on the signal collection ear 1210, so that the conducting end 1310 of the signal line 130 can be installed more quickly.

[0034] Combine Figure 3 As shown, in this embodiment, the guide cavity 1131 gradually narrows from the arcuate cavity 1132 toward the entrance 1133. It can be understood that because the guide cavity 1131 gradually narrows from the arcuate cavity 1132 toward the entrance 1133, after the guide end 1310 of the signal line 130 enters the arcuate cavity 1132, the guide cavity 1131 will provide a certain clamping effect on the guide end 1310 of the signal line 130, effectively preventing the guide end 1310 of the signal line 130 from being dislodged from the arcuate cavity 1132, thereby securely securing the guide end 1310 of the signal line 130. Specifically, the entrance 1133, the guide cavity 1131, and the arcuate cavity 1132 are connected in a pear shape, although this is not limiting, and those skilled in the art may also make other choices as needed.

[0035] Combine Figure 2As shown, in one embodiment, the wire-holding opening 1130 is formed on the wall of the locking groove 1120. Stop blocks 1121 are provided on either side of the wire-holding opening 1130, with each stop block 1121 facing the signal collection lug 1210. It will be appreciated that by providing the stop blocks 1121 on either side of the wire-holding opening 1130, each stop block 1121 faces the signal collection lug 1210, thereby constraining the signal collection lug 1210 and preventing it from bouncing during welding with the conductive end 1310 of the signal wire 130. This further facilitates automated welding by a machine.

[0036] Combine Figure 2 As shown, in one embodiment, a positioning post 1140 is protruding from the cell holder 110, and an alignment hole 1220 is formed on the connecting piece 120; the positioning post 1140 cooperates with the alignment hole 1220. It can be understood that by cooperating with the positioning post 1140 on the cell holder 110 and the alignment hole 1220 on the connecting piece 120, the positioning post 1140 can interfere with the alignment hole 1220, thereby constraining the position of the connecting piece 120, thereby reducing the occurrence of sliding offset between the connecting piece 120 and the cell holder 110 during the welding process, thereby making it more convenient for the machine to perform automatic welding.

[0037] Combine Figure 2 As shown, in one embodiment, the connecting piece 120 is provided with a plurality of linear grooves 1230 surrounding the alignment hole 1220; each linear groove 1230 is connected to the alignment hole 1220, and a locking position 1231 is formed between two adjacent linear grooves 1230; the positioning post 1140 is passed through the alignment hole 1220 and is locked in the locking position 1231. It can be understood that because the connecting piece 120 is provided with a plurality of linear grooves 1230 surrounding the alignment hole 1220, the positioning post 1140 can pass through the alignment hole 1220 and be locked in the locking position 1231 formed between two adjacent linear grooves 1230. The mutual interference between the positioning post 1140 and the locking position 1231 can increase the friction between the alignment hole 1220 and the positioning post 1140, thereby more securely fixing the connecting piece 120 to the battery cell holder 110, further facilitating the automatic welding operation of the machine. Specifically, there are four linear grooves 1230 , and the four linear grooves 1230 are respectively connected to the alignment holes 1220 to form a cross-shaped groove.

[0038] Combine Figure 2 and Figure 4In this embodiment, a plurality of retaining grooves are defined at intervals on the peripheral wall of the positioning post 1140, with each retaining position 1231 retained within a retaining groove. As can be appreciated, by retaining each retaining position 1231 within a retaining groove, the connecting piece 120 maintains interference with the peripheral wall of the positioning post 1140, thereby preventing the connecting piece 120 from loosening and rotating about the circumference of the positioning post 1140, further enhancing the assembly stability between the positioning post 1140 and the connecting piece 120.

[0039] Combine Figure 5 As shown, in one embodiment, the number of wire retaining openings 1130 and the number of signal wires 130 are both multiple, and multiple signal wires 130 are arranged side by side to form a wire harness 13a; multiple wire retaining openings 1130 are arranged in an array on one side of the wire harness 13a; in the wire harness 13a, the conductive end 1310 of each signal wire 130 is respectively close to and retained by the corresponding wire retaining opening 1130. It can be understood that since multiple signal wires 130 are arranged side by side to form the wire harness 13a, the occurrence of entanglement between the signal wires 130 can be reduced, allowing the conductive end 1310 of each signal wire 130 in the wire harness 13a to be respectively close to and retained by the corresponding wire retaining opening 1130, making it easier to organize the signal wires 130. Specifically, in the wiring harness 13a, the length of each signal line 130 decreases along the arrangement direction, and the bend of the conductive end 1310 of each signal line 130 is glued to another adjacent signal line 130. This allows the conductive end 1310 of each signal line 130 to be sequentially retained in the corresponding wire retaining opening 1130 after being pulled out. This reduces the occurrence of redundant and loose signal lines 130 and makes it easier to organize the signal lines 130. The signal lines 130 can be colored blue, white, yellow, or brown to enhance their recognition and further reduce the time required to organize the signal lines 130.

[0040] Combine Figure 1 and Figure 2As shown, the present disclosure further provides a battery module 10, comprising a plurality of battery cells 200 and a battery welding pre-assembly structure according to any of the above embodiments; each battery cell 200 is installed in a mounting hole. It can be understood that by applying the battery welding pre-assembly structure of the present disclosure to the battery module 10, and by installing a battery cell 200 in each mounting hole, when the connecting piece 120 is installed on the conductive surface 1110, the connecting piece 120 can tightly connect the battery cells 200 in series and in parallel. At the same time, the conductive end 1310 of the signal line 130 is clamped through the wire clamping opening 1130, so that the conductive end 1310 of the signal line 130 can be constrained, thereby allowing it to extend more firmly against the signal collection ear 1210. After the conductive end 1310 of the signal line 130 is welded to the signal collection ear 1210, the voltage of the battery cells 200 in the battery module 10 can be monitored through the signal line 130, thereby preventing overcharging or discharging.

[0041] Combine Figure 6 As shown, in one embodiment, the battery module 10 includes at least two stacked battery pre-welded structures; the cell holders 110 of the two adjacent battery pre-welded structures are mated with each other in a concave-convex manner. It is understood that in the stacked at least two battery pre-welded structures, the concave-convex mating between the cell holders 110 of the two adjacent battery pre-welded structures can enhance the connection strength between the adjacent battery pre-welded structures, thereby improving the overall structural strength of the battery module 10.

[0042] Combine Figure 6 As shown, in this embodiment, in two adjacent battery welding pre-assembly structures, a plug-in post 300 is protruding from the cell holder of one battery welding pre-assembly structure, and a matching hole 400 is opened on the cell holder of the other battery welding pre-assembly structure, and the plug-in post 300 is inserted into the matching hole 400. It can be understood that in the two adjacent battery welding pre-assembly structures, by having the plug-in post 300 on the cell holder 110 of one battery welding pre-assembly structure inserted into the matching hole 400 on the cell holder 110 of the other battery welding pre-assembly structure, the movement of the corresponding plug-in post 300 is constrained by the matching hole 400, which not only reduces the relative displacement between the two adjacent battery welding pre-assembly structures, but also enables the two adjacent battery welding pre-assembly structures to be quickly stacked and assembled under the guiding effect of the plug-in post 300. Specifically, in the battery module 10, the pin 300 of the battery welding pre-assembly structure near the end is used to abut against the packaging shell. By supporting the packaging shell with the pin 300, the distance between the battery welding pre-assembly structure and the packaging shell can be shortened, thereby preventing the battery module 10 from shaking and bumping inside the packaging shell.

[0043] Compared with the prior art, the present disclosure has at least the following advantages:

[0044] The above-mentioned battery welding pre-assembly structure, since the signal collection ear 1210 is arranged in the locking groove 1120, the position of the signal collection ear 1210 can be restricted by the locking groove 1120, and the conductive end 1310 of the signal line 130 is clamped by the wire clamping opening 1130, so that the conductive end 1310 of the signal line 130 can be constrained, so that it can be more firmly extended to press against the side of the signal collection ear 1210 facing away from the conductive surface 1110, thereby increasing the friction between the conductive end 1310 of the signal line 130 and the signal collection ear 1210, and stably positioning the signal collection ear 1210 in the locking groove 1120. This can effectively reduce the relative slippage of the signal line 130 and the signal collection ear 1210, so that the machine can accurately and firmly automatically weld the signal collection ear 1210 and the conductive end 1310 of the signal line 130, ultimately improving the welding yield and welding efficiency.

[0045] The above-described embodiments merely represent several implementation methods of the present disclosure. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person of ordinary skill in the art could make various modifications and improvements without departing from the scope of the present disclosure, all of which fall within the scope of protection of the present disclosure. Therefore, the scope of protection of the present patent shall be determined by the appended claims.

Claims

1. A battery welding pre-assembly structure, comprising a cell holder, a connecting piece, and a signal line, wherein the signal line is disposed on the cell holder, the cell holder being used to mount and secure a plurality of cell units, the cell holder having a conductive surface on its outer side; the conductive surface having a plurality of mounting holes, each of which is used to pass an electrode of a cell unit through the hole, so that each cell unit is electrically connected to the connecting piece; the connecting piece being mounted on the conductive surface for connecting the cell units in series and parallel; It is characterized in that The battery cell holder is provided with a locking groove and a wire clamping port at the edge of the conductive surface, and the wire clamping port is connected to the locking groove; the end of the connecting piece is close to the edge of the conductive surface and is bent to form a signal collection ear; the signal collection ear is arranged in the locking groove; the conductive end of the signal line is clamped in the wire clamping port and extends to press against the side of the signal collection ear facing away from the conductive surface.

2. The battery welding pre-assembly structure according to claim 1, characterized in that: The line clamping port includes a guide clamping cavity and an arc-shaped cavity that are connected to each other. The arc-shaped cavity is close to the signal collection ear, and the guide clamping cavity extends outward from the battery holder to form an entrance.

3. The battery welding pre-assembly structure according to claim 2, characterized in that: The guide card cavity gradually narrows from the arc-shaped cavity toward the entrance.

4. The battery welding pre-assembly structure according to claim 1, characterized in that: The line-locking opening is formed on the wall of the embedding groove, and the wall of the embedding groove is provided with stop blocks on both sides of the line-locking opening, and each of the stop blocks is opposite to the signal collecting ear.

5. The battery welding pre-assembly structure according to claim 1, characterized in that: A positioning pile is protruding from the battery cell bracket, and an alignment hole is opened on the connecting piece; the positioning pile is matched with the alignment hole.

6. The battery welding pre-assembly structure according to claim 5, characterized in that: A plurality of linear grooves are provided on the connecting piece around the alignment hole; each linear groove is connected to the alignment hole, and a stop position is formed between two adjacent linear grooves; the positioning pile is passed through the alignment hole and is held in the stop position.

7. The battery welding pre-assembly structure according to claim 6, characterized in that: A plurality of retaining grooves are arranged at intervals on the peripheral wall of the positioning pile, and each retaining position is retained in one of the retaining grooves.

8. The battery welding pre-assembly structure according to claim 1, characterized in that: The number of the wire clamping ports and the number of the signal lines are both multiple, and the multiple signal lines are arranged side by side to form a wire harness; the multiple wire clamping ports are arranged on one side of the wire harness; in the wire harness, the conductive end of each signal line is close to and clamped at the corresponding wire clamping port.

9. A battery module, characterized in that: The invention comprises a plurality of battery cells and a battery welding pre-assembled structure according to any one of claims 1 to 8; each of the battery cells is installed in one of the installation holes.

10. The battery module according to claim 9, characterized in that: The battery module comprises at least two stacked battery welding pre-assembled structures; the cell supports of two adjacent battery welding pre-assembled structures are matched with each other in a concave-convex manner.

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