Bottom insertion type battery swapping battery

Abstract

The utility model discloses a kind of bottom plug-in formula battery replacement batteries, it includes: battery shell and the electric core component, BMS component and guide piece being set in battery shell, BMS component and discharge piece are respectively set in the upside and downside of electric core component, guide piece is fixedly connected to the outside wall of electric core component, guide piece is provided with the guide channel extending along vertical direction, positive power line and negative power line are connected with the connecting end of BMS component, discharge piece and electric core component electrically, and along vertically extending arrangement in the guide channel of guide piece, it is favorable to reduce the risk that positive power line and negative power line are extruded and short-circuit etc., and cooperate with the upside of BMS component setting in electric core component to prevent the setting of water inlet short-circuit, can effectively improve the safety performance of bottom plug-in formula battery replacement battery.

Description

Technical Field

[0001] This utility model relates to the field of bottom-mounted battery swapping technology, and more particularly to a bottom-mounted battery swapping device. Background Technology

[0002] In most existing battery swapping systems, the BMS board and discharge port are located at the bottom. If water enters the battery during use due to the lower half being submerged in water, the BMS board is prone to short circuits. Furthermore, existing battery swapping systems lack a fixed structure for the power lines responsible for the electrical connection between the cells and the discharge components; they are simply scattered inside the battery casing. This also makes the cells prone to short circuits. All of these features pose certain safety hazards to battery swapping systems. Utility Model Content

[0003] The purpose of this invention is to provide a bottom-mounted battery that is not prone to short circuits and has high safety performance.

[0004] To achieve the above objectives, this utility model discloses a bottom-mounted battery swapping device, comprising:

[0005] A battery casing, wherein a receiving cavity is provided inside the battery casing, and a discharge port communicating with the receiving cavity is provided on the bottom end surface of the battery casing. A discharge element is installed on the discharge port, and a positive terminal and a negative terminal are provided on the end of the discharge element near the receiving cavity.

[0006] A battery cell assembly is disposed in the accommodating cavity. The battery cell assembly includes multiple battery cells connected in series. The top surface of the battery cell assembly is provided with a positive terminal interface and a negative terminal interface that are electrically connected to the battery cells connected in series.

[0007] BMS component, the BMS component is disposed on the top surface of the cell assembly, the BMS component is provided with a first connection terminal and a second connection terminal;

[0008] A guide member is fixedly connected to the outer wall of the battery cell assembly. The guide member is provided with a vertically extending guide channel. A positive power line and a negative power line are provided in the guide channel. The two ends of the positive power line and the negative power line extend along the guide channel to the top surface of the battery cell assembly and the bottom wall of the accommodating cavity, respectively. One end of the positive power line is connected to the positive connection terminal, and the other end is connected to the positive interface. The negative interface is electrically connected to the first connection terminal. One end of the negative power line is electrically connected to the second connection terminal, and the other end is electrically connected to the negative connection terminal.

[0009] Optionally, multiple limiting strips are alternately arranged vertically on both sides of the guide channel, and the guide channel includes a guide opening, with the multiple limiting strips arranged at intervals in the guide opening.

[0010] Optionally, three guide channels are provided. The BMS component includes a communication interface and a communication line. The positive power line, the negative power line, and the communication line are respectively housed in one of the guide channels. The communication line extends along the guide channel to the top and bottom of the cell assembly. The two ends of the communication line are electrically connected to the communication interface and the discharge element, respectively.

[0011] Optionally, the battery cell assembly includes multiple horizontally arranged battery cells, a first bracket and a second bracket. The opposing sides of the first bracket and the second bracket are provided with multiple mounting slots and multiple connecting posts. The mounting slots are used for inserting and fixing the ends of the battery cells. The connecting posts of the first bracket and the second bracket abut against each other one by one. The connecting posts are provided with through connecting holes. The screw passes through the corresponding connecting holes on the first bracket and the second bracket and is threadedly connected to the nut.

[0012] Optionally, multiple series plates are provided on the opposite sides of the first bracket and the second bracket. The multiple cells are formed into a cell group in pairs. One series plate is used to connect two adjacent cell groups in series. The connected cell group forms a positive terminal and a negative terminal. A positive electrode plate and a negative electrode plate are respectively provided on the upper end of the first bracket and the second bracket. One end of the positive electrode plate is connected to the positive terminal, and the other end forms the positive terminal interface. One end of the negative electrode plate is connected to the negative terminal, and the other end forms the negative terminal interface.

[0013] Optionally, a sampling plate is provided between each of the positive electrode, the negative electrode, and the series plate and the end of the battery cell. Each sampling plate is connected to a sampling line. Multiple wire-locking holes are provided at the edges on both sides of the first bracket and the second bracket. Multiple horizontal L-shaped hooks are provided at vertical intervals on the edges of the opposing sides of the first bracket and the second bracket. Each hook is provided with a wire-locking groove. The sampling line passes through the wire-locking holes and at least one wire-locking groove in sequence and extends upward to the top surface of the battery cell assembly, and is electrically connected to the BMS assembly.

[0014] Optionally, the opposite sides of the first support and the second support are each provided with a separator plate covering the positive electrode plate, the negative electrode plate and the series plate.

[0015] Optionally, each of the outer walls of the battery cell assembly is provided with at least one buffer sheet extending vertically, and the two sides of the buffer sheet are respectively attached to the inner wall of the battery casing and the outer wall of the battery cell assembly.

[0016] This invention features a guide to limit the positive and negative power lines connecting the battery cell assembly, BMS assembly, and discharge unit. The BMS assembly and discharge unit are respectively located on the upper and lower sides of the battery cell assembly. The guide is fixedly connected to the outer wall of the battery cell assembly and has a vertically extending guide channel. The positive and negative power lines are electrically connected to the connection ends of the BMS assembly, discharge unit, and battery cell assembly, and are arranged vertically within the guide channel of the guide. This helps reduce the risk of compression and short circuits to the positive and negative power lines. Furthermore, the BMS assembly is located on the upper side of the battery cell assembly to prevent water ingress and short circuits, effectively improving the safety performance of the bottom-mounted battery swapping system. Attached Figure Description

[0017] Figure 1 This is an exploded structural diagram of the bottom-mounted battery swapping device according to an embodiment of the present invention.

[0018] Figure 2 This is a three-dimensional structural view of the bottom-mounted battery swapping system according to an embodiment of the present invention, with part of the battery casing omitted.

[0019] Figure 3 This is an exploded structural diagram of the cell assembly, BMS assembly, and guide components in the bottom-mounted battery swapping system according to an embodiment of this utility model. Detailed Implementation

[0020] 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.

[0021] Please see Figures 1 to 3 This utility model discloses a bottom-mounted battery swapping device, which includes:

[0022] The battery housing 1 has a cavity 11 inside. The bottom end of the battery housing 1 has a discharge port 12 that communicates with the cavity 11. A discharge element 13 is installed in the discharge port 12. The end of the discharge element 13 near the cavity 11 has a positive terminal connection 131 and a negative terminal connection 132.

[0023] The battery cell assembly 2 is disposed in the accommodating cavity 11. The battery cell assembly 2 includes a plurality of battery cells 21 connected in series. The top surface of the battery cell assembly 2 is provided with a positive terminal interface 22 and a negative terminal interface 23 that are electrically connected to the battery cells 21 connected in series.

[0024] BMS component 3 is disposed on the top surface of cell assembly 2, and BMS component 3 is provided with a first connection end 31 and a second connection end 32.

[0025] The guide 4 is fixedly connected to the outer wall of the cell assembly 2. The guide 4 is provided with a vertically extending guide channel 41. A positive power line 51 and a negative power line 52 are provided in the guide channel 41. The two ends of the positive power line 51 and the negative power line 52 extend along the guide channel 41 to the top surface of the cell assembly 2 and the bottom wall of the accommodating cavity 11, respectively. One end of the positive power line 51 is connected to the positive connection terminal 131 and the other end is connected to the positive interface 22. The negative interface 23 is electrically connected to the first connection terminal 31. One end of the negative power line 52 is electrically connected to the second connection terminal 32 and the other end is electrically connected to the negative connection terminal 132.

[0026] This utility model is equipped with a guide 4 to limit the positive power line 51 and negative power line 52 connecting the cell assembly 2, BMS assembly 3 and discharge unit 13. The BMS assembly 3 and discharge unit 13 are respectively disposed on the upper and lower sides of the cell assembly 2. The guide 4 is fixedly connected to the outer wall of the cell assembly 2. The guide 4 is provided with a vertically extending guide channel 41. The positive power line 51 and negative power line 52 are electrically connected to the connection ends of the BMS assembly 3, discharge unit 13 and cell assembly 2, and are arranged vertically within the guide channel 41 of the guide 4. This helps to reduce the risk of compression and short circuit of the positive power line 51 and negative power line 52. In addition, the BMS assembly 3 is disposed on the upper side of the cell assembly 2 to prevent water ingress and short circuit, which can effectively improve the safety performance of the bottom plug-in battery.

[0027] See Figures 1 to 3 Multiple limiting strips 411 are alternately arranged vertically on both sides of the guide channel 41. The guide channel 41 includes a guide opening 412, and the multiple limiting strips 411 are arranged at intervals in the guide opening 412.

[0028] Specifically, in this embodiment, the guide 4 is fixed to the side wall of the cell assembly 2 by screws. The setting of multiple limiting strips 411 makes the guide opening 412 continuously meandering, so that the positive power line 51, negative power line 52 and communication line can be neatly stored in the guide channel 41 through the guide opening 412. The setting of the limiting strips 411 realizes the structural limitation of the wire harness, which helps to reduce the risk of short circuit and compression, and effectively improves the safety performance of the bottom plug-in battery swapping device.

[0029] Furthermore, the guide member 4 has three guide channels 41 arranged side by side. The BMS component 3 includes a communication interface 33 and a communication line 34. The positive power line 51, the negative power line 52 and the communication line 34 are respectively housed in one of the guide channels 41. The communication line 34 extends along the guide channel 41 to the top and bottom of the cell assembly 2. The two ends of the communication line 34 are electrically connected to the communication interface 33 and the discharge member 13, respectively.

[0030] Specifically, in this embodiment, the positive power line 51 and the negative power line 52 are respectively provided with connection terminals at both ends. The discharge component 13 is fixedly connected to the bottom shell of the battery casing 1 by means of screws. Then, the connection terminals at the bottom of the positive power line 51 and the negative power line 52 are also fixedly connected to the positive connection terminal 131 and the negative connection terminal 132 on both sides of the discharge component 13 by means of screws. The two ends of the communication line 34 are respectively provided with connectors. The connector at the bottom of the communication line 34 is inserted into the signal connection terminal of the discharge component 13. The positive power line 51, the negative power line 52 and the communication line 34 are neatly stored in one of the guide channels 41. The connection terminals at the top of the positive power line 51 and the negative power line 52 are respectively locked and connected to the copper busbar (positive connection terminal 131) of the cell assembly 2 and the wiring pad (second connection terminal 32) of the BMS assembly 3. The connector at the top of the communication line 34 is inserted into the communication interface 33 of the BMS assembly 3, but is not limited to this.

[0031] See Figures 1 to 3 The battery cell assembly 2 includes multiple horizontally arranged battery cells 21, a first bracket 241 and a second bracket 242. The opposing sides of the first bracket 241 and the second bracket 242 are provided with multiple mounting slots 243 and multiple connecting posts 244. The mounting slots 243 are used for inserting and fixing the ends of the battery cells 21. The connecting posts 244 of the first bracket 241 and the connecting posts 244 of the second bracket 242 abut against each other. The connecting posts 244 are provided with through connecting holes 2441. The screw passes through the corresponding connecting holes 2441 on the first bracket 241 and the second bracket 242 and is threadedly connected to the nut.

[0032] Specifically, in this embodiment, the first bracket 241 and the second bracket 242 are provided with a surrounding portion 245 around the mounting groove 243 to wrap around the outermost battery cell 21, so as to further stabilize the assembly of the battery cell 21. The first bracket 241 and the second bracket 242 are locked together by screws and nuts, and the overall connection structure is stable and not easy to loosen, which is conducive to improving the mechanical strength of the battery cell assembly 2.

[0033] Specifically, in this embodiment, the BMS component 3 is secured to the upper surface of the first bracket 241 and the second bracket 242 with screws to reduce the possibility of water ingress and short circuit of the BMS component 3 when water enters the bottom of the battery during use.

[0034] Furthermore, multiple series plates 251 are provided on the opposite sides of the first bracket 241 and the second bracket 242. Multiple cells 21 are formed into a cell group 210 in pairs. A series plate 251 is used to connect two adjacent cell groups 210 in series. The connected cell group 210 forms a positive terminal 2101 and a negative terminal 2102. A positive electrode plate 252 and a negative electrode plate 253 are respectively provided on the upper end of the first bracket 241 and the second bracket 242. One end of the positive electrode plate 252 is connected to the positive terminal 2101, and the other end forms a positive terminal interface 22. One end of the negative electrode plate 253 is connected to the negative terminal 2102, and the other end forms a negative terminal interface 23.

[0035] Furthermore, a collection plate 261 is provided between each positive electrode 252, negative electrode 253, and series plate 251 and the end of the cell 21. Each collection plate 261 is connected to a collection line 262. Multiple wire-locking holes 246 are provided on the edges of the first bracket 241 and the second bracket 242. Multiple horizontal L-shaped hooks 247 are provided vertically at intervals on the edges of the opposing sides of the first bracket 241 and the second bracket 242. Each hook 247 is provided with a wire-locking groove 2471. The collection line 262 passes through the wire-locking holes 246 and at least one wire-locking groove 2471 in sequence and extends upward to the top surface of the cell assembly 2, and is electrically connected to the BMS assembly 3.

[0036] Specifically, in this embodiment, each series plate 251, positive electrode plate 252, and negative electrode plate 253 are combined with a corresponding acquisition plate 261 to form a copper-nickel composite connecting plate, which is connected to the end of the cell 21 by spot welding. One end of the acquisition line 262 is welded to the copper-nickel composite connecting plate, and the other end is provided with a connector that is inserted into the voltage acquisition interface 35 of the BMS component 3. The acquisition line 262 is orderly limited and fixed in the wire slot 2471 of the hook piece 247. There is no risk of wire pressure and short circuit during assembly, which is beneficial to improving the overall safety performance of the battery swapping device.

[0037] Furthermore, the opposite sides of the first support 241 and the second support 242 are each provided with an isolation plate 248 covering the positive electrode 252, the negative electrode 253 and the series plate 251.

[0038] Specifically, in this embodiment, the separator 248 is a fiberboard and is attached to the side of the first support 241 and the second support 242 where the positive electrode 252, the negative electrode 253 and the series plate 251 are provided by adhesive bonding, which helps to avoid short circuits in the battery cell assembly 2.

[0039] See Figures 1 to 3 Each of the outer walls of the battery cell assembly 2 is provided with at least one buffer sheet 249 extending vertically. The two sides of the buffer sheet 249 are respectively attached to the inner wall of the battery casing 1 and the outer wall of the battery cell assembly 2.

[0040] Specifically, in this embodiment, the buffer sheet 249 is a strip-shaped buffer pad, and two buffer sheets 249 are attached to each side of the battery cell assembly 2 by adhesive bonding, which is beneficial to achieve buffer protection for the battery cell assembly 2.

[0041] 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 bottom-mounted plug-in battery, characterized in that, include: A battery casing, wherein a receiving cavity is provided inside the battery casing, and a discharge port communicating with the receiving cavity is provided on the bottom end surface of the battery casing. A discharge element is installed on the discharge port, and a positive terminal and a negative terminal are provided on the end of the discharge element near the receiving cavity. A battery cell assembly is disposed in the accommodating cavity. The battery cell assembly includes multiple battery cells connected in series. The top surface of the battery cell assembly is provided with a positive terminal interface and a negative terminal interface that are electrically connected to the battery cells connected in series. BMS component, the BMS component is disposed on the top surface of the cell assembly, the BMS component is provided with a first connection terminal and a second connection terminal; A guide member is fixedly connected to the outer wall of the battery cell assembly. The guide member is provided with a vertically extending guide channel. A positive power line and a negative power line are provided in the guide channel. The two ends of the positive power line and the negative power line extend along the guide channel to the top surface of the battery cell assembly and the bottom wall of the accommodating cavity, respectively. One end of the positive power line is connected to the positive connection terminal, and the other end is connected to the positive interface. The negative interface is electrically connected to the first connection terminal. One end of the negative power line is electrically connected to the second connection terminal, and the other end is electrically connected to the negative connection terminal.

2. The bottom-mounted battery swapping device according to claim 1, characterized in that, The guide channel has multiple limiting strips alternately arranged vertically on both sides. The guide channel includes a guide opening, and the multiple limiting strips are arranged at intervals in the guide opening.

3. The bottom-mounted battery swapping system according to claim 1, characterized in that, The guide channel is provided in three ways. The BMS component includes a communication interface and a communication line. The positive power line, the negative power line and the communication line are respectively housed in one of the guide channels. The communication line extends along the guide channel to the top and bottom of the cell assembly. The two ends of the communication line are electrically connected to the communication interface and the discharge element, respectively.

4. The bottom-mounted battery swapping device according to claim 1, characterized in that, The battery cell assembly includes multiple horizontally arranged battery cells, a first bracket, and a second bracket. The opposing sides of the first bracket and the second bracket are provided with multiple mounting slots and multiple connecting posts. The mounting slots are used for inserting and fixing the ends of the battery cells. The connecting posts of the first bracket and the second bracket abut against each other. The connecting posts are provided with through connecting holes. The screw passes through the corresponding connecting holes on the first bracket and the second bracket and is threadedly connected to the nut.

5. The bottom-mounted battery swapping device according to claim 4, characterized in that, Multiple series plates are provided on the opposite sides of the first and second brackets. Multiple battery cells are formed into a battery cell group in pairs. One series plate is used to connect two adjacent battery cell groups in series. The connected battery cell group forms a positive terminal and a negative terminal. A positive electrode plate and a negative electrode plate are respectively provided on the upper end of the first and second brackets. One end of the positive electrode plate is connected to the positive terminal, and the other end forms the positive terminal interface. One end of the negative electrode plate is connected to the negative terminal, and the other end forms the negative terminal interface.

6. The bottom-mounted battery swapping device according to claim 5, characterized in that, A data acquisition plate is provided between each of the positive electrode, negative electrode, and series electrode and the end of the battery cell. Each data acquisition plate is connected to a data acquisition line. Multiple wire-locking holes are provided on the edges of the first and second supports. Multiple horizontal L-shaped hooks are provided at vertical intervals on the edges of the opposing sides of the first and second supports. Each hook has a wire-locking groove. The data acquisition line passes through the wire-locking holes and at least one wire-locking groove in sequence and extends upward to the top surface of the battery cell assembly, and is electrically connected to the BMS assembly.

7. The bottom-mounted battery swapping device according to claim 5, characterized in that, Both the first support and the second support have isolation plates on their opposite sides that cover the positive electrode, the negative electrode, and the series plates.

8. The bottom-mounted battery swapping device according to claim 1, characterized in that, At least one buffer sheet extending vertically is provided on the outer side wall of the battery cell assembly, and the two sides of the buffer sheet are respectively attached to the inner side wall of the battery casing and the outer side wall of the battery cell assembly.

Images