Battery device with good electrical connection structure stability and vehicle power system

Abstract

The utility model discloses a battery device with good electrical connection structure stability and a vehicle power system, the battery device comprises a shell, a battery cell, at least one connecting piece, a fixing piece and a connecting wire, the shell is provided with at least one binding post; the battery cell is arranged in the shell, and the battery cell is provided with a connecting tab; the connecting piece comprises a first connecting part and a second connecting part, one end of the fixing piece is fixedly connected with the first connecting part, the other end of the fixing piece is fixedly connected with the inner side wall of the shell, and the second connecting part is fixedly connected with the connecting tab; the connecting line is provided with a first wiring terminal and a second wiring terminal, the first wiring terminal is fixedly connected with the first connecting part, and the second wiring terminal is connected with the binding post. According to the battery device with the good electric connection structure stability, the structural stability of the connecting piece can be improved, the situation that the binding post is disconnected with the battery core is reduced, and the durability of the battery device is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of battery device technology, and more particularly to a battery device and vehicle power system with good electrical connection structure stability. Background Technology

[0002] With the widespread application of power batteries in automobiles, manufacturers have increasingly higher requirements for the performance and lifespan of power batteries. However, existing power batteries have a problem: the terminals on the battery casing are prone to disconnection from the terminals of the internal cells. Analysis revealed that the connecting wire to the terminal is electrically connected to the terminal via an L-shaped aluminum plate. However, the connecting wire is suspended in the air. As the car moves, the connecting wire swings up and down, and the force generated is entirely applied to the L-shaped aluminum plate. Due to prolonged pressure, the L-shaped aluminum plate is prone to breakage due to metal fatigue, which in turn leads to the terminals easily disconnecting from the terminals of the cells. Utility Model Content

[0003] The purpose of this invention is to provide a battery device with good electrical connection structure stability, which can improve the structural stability of the connector, reduce the occurrence of disconnection between the terminal and the battery cell, and effectively improve the durability of the battery device.

[0004] Another objective of this invention is to provide a vehicle power system in which a battery device with a stable electrical connection structure can improve the structural stability of the connectors, reduce the occurrence of disconnection between the terminals and the battery cells, and effectively improve the durability of the battery device in the vehicle power system.

[0005] To achieve the above objectives, this utility model discloses a battery device with good electrical connection structure stability, comprising:

[0006] A housing, wherein the housing is provided with at least one terminal;

[0007] A battery cell, wherein the battery cell is disposed within the housing, and the battery cell is provided with connecting tabs;

[0008] At least one connector and one fastener, the connector including a first connecting part and a second connecting part, one end of the fastener being fixedly connected to the first connecting part and the other end being fixedly connected to the inner sidewall of the housing, and the second connecting part being fixedly connected to the connecting tab;

[0009] At least one connecting wire is provided, the connecting wire being provided with a first terminal and a second terminal, the first terminal being fixedly connected to the first connecting part, and the second terminal being connected to the terminal post.

[0010] Optionally, the fixing member is cylindrical, the connecting member is L-shaped, the first connecting part is provided with a through hole, the fixing member is provided with a threaded hole, and the first terminal is threadedly connected to the threaded hole through the through hole by a screw to be fixedly connected to the first connecting part and the fixing member.

[0011] Optionally, at least one deformable buffer is provided on each of the opposite sides of the battery cell.

[0012] Optionally, the buffer is in the shape of an open box, and the side of the buffer near the battery cell has at least one perforation.

[0013] Optionally, the battery device further includes at least one connecting and stabilizing member, the two ends of which are respectively fixedly connected to the tops of the two buffer members.

[0014] Optionally, the battery device further includes six protective insulating blocks, which are respectively disposed on the six sides of the battery cell, and the size of each protective insulating block is set to correspond to the size of each outer surface of the battery cell.

[0015] Optionally, the vertical dimension of the housing is larger than the vertical dimension of the battery cell so that the housing forms an explosion-proof buffer space on the upper side of the battery cell.

[0016] Optionally, an explosion-proof insulating block is provided in the explosion-proof buffer space, and the size of the explosion-proof insulating block is the same as the size of the top surface of the battery cell.

[0017] Optionally, the terminal block includes an external terminal block and an internal terminal block. The external terminal block is provided on the surface of the housing, and a BMS device is provided inside the housing. The BMS device is provided with the internal terminal block, and the explosion-proof insulating block is provided with a wiring opening corresponding to the external terminal block.

[0018] To achieve the above objectives, this utility model discloses a vehicle power system, which includes a battery device with good electrical connection structure stability as described above.

[0019] This utility model relates to a battery device with good electrical connection structure stability. It uses a fixing component to secure the connecting component. The housing contains a battery cell and terminals. The battery cell has connecting tabs, a connecting component, and a fixing component. The connecting component includes a first connecting part and a second connecting part. The two ends of the fixing component are fixedly connected to the first connecting part and the inner sidewall of the housing, respectively. The second connecting part is fixedly connected to the connecting tabs. A connecting wire connects the first connecting part and the terminals. The fixing component securely connects the first connecting part of the connecting component to the housing, improving the structural stability of the connecting component, reducing the possibility of disconnection between the terminals and the battery cell, and effectively improving the durability of the battery device. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a battery device with good electrical connection structure stability according to an embodiment of this utility model.

[0021] Figure 2 This is a cross-sectional view of a battery device with good electrical connection structure stability according to an embodiment of this utility model.

[0022] Figure 3 This is a three-dimensional structural view of a battery device with good electrical connection structure stability according to an embodiment of the present invention, omitting the casing.

[0023] Figure 4 for Figure 3 A three-dimensional structural diagram from another perspective. Detailed Implementation

[0024] To explain in detail the technical content, structural features, objectives and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0025] Please see Figures 1 to 4 This utility model discloses a battery device with good electrical connection structure stability, which includes:

[0026] Housing 1, housing 1 is provided with at least one terminal 11;

[0027] Battery cell 2 is disposed inside housing 1 and is provided with connecting tabs 21.

[0028] At least one connector 3 and a fixing member 4 are provided. The connector 3 includes a first connecting part 31 and a second connecting part 32. One end of the fixing member 4 is fixedly connected to the first connecting part 31 and the other end is fixedly connected to the inner side wall of the housing 1. The second connecting part 32 is fixedly connected to the connecting tab 21.

[0029] At least one connecting wire (not shown in the figure) is provided with a first terminal and a second terminal. The first terminal is fixedly connected to the first connecting part 31, and the second terminal is connected to the terminal block 11.

[0030] This utility model presents a battery device with good electrical connection structure stability. The connector 3 is fixedly connected by a fixing member 4. The housing 1 contains a battery cell 2 and a terminal 11. The battery cell 2 is provided with a connecting tab 21, the connector 3, and the fixing member 4. The connector 3 includes a first connecting part 31 and a second connecting part 32. The two ends of the fixing member 4 are fixedly connected to the first connecting part 31 and the inner side wall of the housing 1, respectively. The second connecting part 32 is fixedly connected to the connecting tab 21. Then, the first connecting part 31 and the terminal 11 are connected by a connecting wire. The fixing member 4 is used to fix the first connecting part 31 of the connector to the housing 1, which can improve the structural stability of the connector 3, reduce the possibility of disconnection between the terminal 11 and the battery cell 2, and effectively improve the durability of the battery device.

[0031] See Figures 1 to 4 The fixing part 4 is cylindrical, the connecting part 3 is L-shaped, the first connecting part 31 is provided with a through hole 311, the fixing part 4 is provided with a threaded hole 41, and the first terminal is threaded to the threaded hole 41 by passing a screw through the through hole 311 to fix it to the first connecting part 31 and the fixing part 4.

[0032] Specifically, in this embodiment, the first terminal of the connecting wire is directly locked to the fixing member 4 by a screw, so that all the force of the connecting wire is applied to the fixing member 4, and the fixing member 4 is directly fixed to the housing 1. This can effectively prevent the connecting member 3 from bearing the force for a long time, so as to achieve the anti-oscillation effect and help prevent the connection between the first connecting part 31 and the second connecting part 32 from breaking.

[0033] See Figures 1 to 4 At least one deformable buffer 5 is provided on each of the opposite sides of the battery cell 2.

[0034] Specifically, in this embodiment, two transversely extending buffer members 5 are provided inside the housing 1 and are provided corresponding to the front and rear inner sidewalls of the housing 1. The buffer member 5 is an anti-collision bracket and is made of a flexible material that can achieve a deformation of 5%. When the lithium battery is impacted and the housing is squeezed and deformed, the buffer member 5 can collapse and withstand most of the impact force to effectively protect the battery and avoid the situation in the prior art where the force is transmitted through a hard and non-stretchable baffle and then acts entirely on the cell 2 body, resulting in battery damage and explosion or smoke.

[0035] Furthermore, the buffer 5 is in the shape of an open box, and the side of the buffer 5 near the battery cell 2 is provided with at least one perforated hole 51.

[0036] The hollow design and the cushioning element 5 made of a certain elastic material can meet the requirement that the 5% expansion coefficient of the battery cell 2 when it is fully charged needs to be released, which can effectively extend the service life of the battery cell 2.

[0037] Furthermore, the battery device also includes at least one connecting and stabilizing member 6, with both ends of the connecting and stabilizing member 6 being fixedly connected to the tops of the two buffer members 5 respectively.

[0038] Specifically, in this embodiment, the connecting and stabilizing member 6 is a pressure plate and there are two of them, which are used to press and fix the battery cell 2 to prevent it from jumping vertically; one of the connecting and stabilizing members 6 is provided with a support part 61, which is used to install and fix the BMS device 7. Both connecting and stabilizing members 6 are provided with a first opening 62 corresponding to the explosion-proof valve of the battery cell 2, but are not limited to this.

[0039] See Figures 1 to 4The battery device also includes six protective insulating blocks 8, which are respectively disposed on the six sides of the battery cell 2. The size of each protective insulating block 8 corresponds to the size of each outer surface of the battery cell 2, thereby effectively protecting the battery cell 2 and improving the safety performance of the battery cell 2.

[0040] Specifically, in this embodiment, the size of the five protective insulating blocks 8 is consistent with the size of the four outer sides and the bottom surface of the battery cell. The protective insulating block 8 includes a first protective block 81 and a second protective block 82. The first protective block 81 and the second protective block 82 are respectively disposed on the top surface of the battery cell 2, except for the area where the series block 200 connecting each battery cell module 20 is disposed. The first protective block 81 and the second protective block 82 are provided with a second opening 83 corresponding to the explosion-proof valve of the battery cell 2, and are not limited thereto.

[0041] See Figures 1 to 4 The vertical dimension of the housing 1 is larger than that of the cell 2 so that the housing 1 forms an explosion-proof buffer space 12 on the upper side of the cell 2. This ensures that when the cell 2 explodes or catches fire, the housing 1 has sufficient space to buffer the flammable material ejected by the explosion-proof valve of the cell 2, preventing the housing 1 from cracking outward due to huge internal pressure. It also prevents the cell 2 from having a destructive impact on the external environment when it explodes or catches fire, thereby effectively improving the safety performance of the battery device.

[0042] Furthermore, an explosion-proof insulating block 13 is provided in the explosion-proof buffer space 12, and the size of the explosion-proof insulating block 13 is the same as the size of the top surface of the battery cell 2.

[0043] Specifically, in this embodiment, the explosion-proof insulating block 13 is positioned directly above the explosion-proof valve of the battery cell 2, thereby effectively isolating the flammable material ejected from the explosion-proof valve of the battery cell 2 from the impact on the housing 1.

[0044] See Figures 1 to 4 The terminal block 11 includes an outer terminal block 111 and an inner terminal block 112. The outer terminal block 111 is provided on the surface of the housing 1. The BMS device 7 is provided inside the housing 1. The BMS device 7 is provided with an inner terminal block 112. The explosion-proof insulating block 13 is provided with a wiring opening 131 corresponding to the outer terminal block 111.

[0045] Specifically, in this embodiment, four external terminals 111 are provided, including two P+ terminals and two P- terminals, and two internal terminals 112 are provided, including a B- terminal and a P- terminal. The battery cell 2 is provided with a B+ terminal and a B- terminal. A connector 3 is provided at the B+ terminal and the B- terminal respectively. The B+ terminal is connected to the two P+ terminals through the connector 3 and the connecting wire. The B- terminal is connected to the B- terminal of the BMS device 7 through the connector 3 and the connecting wire. The P- terminal of the BMS device 7 is connected to the two P- terminals through the connecting wire.

[0046] Please see Figures 1 to 4 This utility model discloses a vehicle power system, which includes: a battery device with good electrical connection structure stability as described above.

[0047] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the scope of the present utility model application shall still fall within the scope of the present utility model.

Claims

1. A battery device with good electrical connection structure stability, characterized in that, include: A housing, wherein the housing is provided with at least one terminal; A battery cell, wherein the battery cell is disposed within the housing, and the battery cell is provided with connecting tabs; At least one connector and one fastener, the connector including a first connecting part and a second connecting part, one end of the fastener being fixedly connected to the first connecting part and the other end being fixedly connected to the inner sidewall of the housing, and the second connecting part being fixedly connected to the connecting tab; At least one connecting wire is provided, the connecting wire being provided with a first terminal and a second terminal, the first terminal being fixedly connected to the first connecting part, and the second terminal being connected to the terminal post.

2. The battery device with good electrical connection structure stability according to claim 1, characterized in that, The fixing member is cylindrical, the connecting member is L-shaped, the first connecting part is provided with a through hole, the fixing member is provided with a threaded hole, and the first terminal is threaded to the threaded hole by passing a screw through the through hole to fix it to the first connecting part and the fixing member.

3. The battery device with good electrical connection structure stability according to claim 1, characterized in that, At least one deformable buffer is provided on each of the opposite sides of the battery cell.

4. The battery device with good electrical connection structure stability according to claim 3, characterized in that, The buffer is in the shape of an open box, and the side of the buffer closest to the battery cell has at least one perforation.

5. The battery device with good electrical connection structure stability according to claim 3, characterized in that, It also includes at least one connecting and stabilizing member, the two ends of which are respectively fixedly connected to the tops of the two buffer members.

6. The battery device with good electrical connection structure stability according to claim 5, characterized in that, It also includes six protective insulating blocks, which are respectively disposed on the six sides of the battery cell, and the size of each protective insulating block is set to correspond to the size of each outer surface of the battery cell.

7. The battery device with good electrical connection structure stability according to claim 1, characterized in that, The vertical dimension of the housing is larger than the vertical dimension of the battery cell so that the housing forms an explosion-proof buffer space on the upper side of the battery cell.

8. The battery device with good electrical connection structure stability according to claim 7, characterized in that, An explosion-proof insulating block is provided within the explosion-proof buffer space, and the size of the explosion-proof insulating block is the same as the size of the top surface of the battery cell.

9. The battery device with good electrical connection structure stability according to claim 8, characterized in that, The terminal block includes an outer terminal block and an inner terminal block. The outer terminal block is provided on the surface of the housing. A BMS device is provided inside the housing. The BMS device is provided with the inner terminal block. The explosion-proof insulating block is provided with a wiring opening corresponding to the outer terminal block.

10. A vehicle powertrain system, characterized in that, include: A battery device with good electrical connection structure as described in any one of claims 1 to 9.

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