A battery pack and an electric device

Abstract

This utility model relates to the field of new energy battery technology and discloses a battery pack and electrical equipment having mutually perpendicular first and second directions. The battery pack includes: multiple battery cells arranged along the first direction; an integrated busbar including an isolation plate, a circuit board, connectors, and a fixing plate. The circuit board includes a data acquisition section and a connection section. The data acquisition section is electrically connected to the multiple battery cells, the connection section is electrically connected to the connectors, and the connection section is fixedly connected to the fixing plate. The isolation plate includes a plate body and a snap-fit ​​component. The fixing plate snaps into the snap-fit ​​component. The plate body extends along the first direction, and the orthographic projections of the fixing plate and connectors along the second direction are both located within the plate body. Since the orthographic projections of the fixing plate and connectors along the second direction are located within the plate body, the connectors and fixing plate are both located on the plate body of the isolation plate. This eliminates the need for additional supports on the sides of the battery cells, reducing material costs associated with supports and saving battery compartment space within the battery pack, thereby increasing the battery pack's energy density.

Description

Technical Field

[0001] This utility model relates to the field of new energy battery technology, and in particular to a battery pack and electrical equipment. Background Technology

[0002] The battery management system (BMS) is a crucial component of the battery pack, primarily responsible for the intelligent management and maintenance of each battery cell. It prevents overcharging and over-discharging, extends battery life, and monitors battery status. The BMS mainly acquires battery status information such as temperature and voltage through the integrated busbar (Cell Connection System, CCS) and transmits this information to the management module via connectors.

[0003] Integrated busbars are limited by battery width and the sampling line requirements of the information acquisition components. The connectors for these components are typically fixed to the outer endplate of the battery pack. A dedicated bracket is installed on the outside of the battery pack's endplate to hold the connectors in place, and the connectors are then fixedly connected to the circuit board. However, this fixing method requires a separate bracket on the outside of the battery pack's endplate, increasing material costs and occupying space in the battery pack's electrical compartment, thus reducing the battery pack's space utilization. Utility Model Content

[0004] The purpose of this utility model is to provide a battery pack to solve the problems of high material cost and space occupation when fixing the information collection components of the battery pack in the prior art; this utility model also provides an electrical device using the battery pack.

[0005] To achieve the above objectives, this utility model provides a battery pack having a first direction and a second direction that are perpendicular to each other, and the battery pack includes:

[0006] Multiple battery cells, each of which is arranged along the first direction;

[0007] An integrated busbar includes an isolation plate, a circuit board, connectors, and a fixing plate. The circuit board includes interconnected acquisition sections and connection sections. The acquisition sections are electrically connected to multiple battery cells. The connection sections are electrically connected to the connectors and are fixedly connected to the fixing plate. The fixing plate is connected to the side of the connection section away from the connectors, and the isolation plate is connected to the side of the fixing plate close to the battery cells.

[0008] The isolation plate includes a plate body and a snap-fit ​​component fixedly connected to the plate body. The fixing plate is snapped into the snap-fit ​​component. The plate body extends along the first direction. The orthographic projections of the fixing plate and the snap-fit ​​component along the second direction are both located within the plate body.

[0009] In some embodiments, the latching member includes latches, at least two latches are spaced apart, the fixing plate is at least partially located between each of the latches, and the fixing plate is latched to each of the latches.

[0010] In some embodiments, the snap-fit ​​component further includes a limiting plate, which is fixedly connected to the plate body. The limiting plate and each of the snap claws enclose an assembly cavity, and the fixing plate is disposed in the assembly cavity.

[0011] In some embodiments, the snap-fit ​​component further includes a support plate, which is fixedly connected to the limiting plate. The support plate is located within the assembly cavity, and along the second direction, the fixing plate is connected to the side of the support plate away from the plate body.

[0012] In some embodiments, at least two support plates are provided, and each support plate is spaced apart along the first direction.

[0013] In some embodiments, the circuit board further includes a bending section connected between the acquisition section and the connection section; the bending section bends away from the battery cell along the second direction relative to the acquisition section.

[0014] In some embodiments, the battery pack further includes a housing having a receiving cavity in which a plurality of battery cells and an integrated busbar are disposed;

[0015] The isolation plate is fixedly connected to the box body, and the insertion interface of the plug is arranged along the first direction toward one side of the bent section.

[0016] In some embodiments, the integrated busbar further includes a busbar electrically connected to the battery cell, the board body has an isolation cavity, the busbar is disposed in the isolation cavity, and the acquisition segment is electrically connected to the busbar.

[0017] In some embodiments, the integrated busbar further includes a data acquisition chip, which is electrically connected to the data acquisition segment and the busbar.

[0018] This utility model also provides an electrical device, including the battery pack described in any of the above technical solutions.

[0019] Compared with the prior art, the battery pack and electrical equipment of this utility model embodiment have the following advantages: a fixing plate is set on the side of the connection section away from the plug-in to reinforce the connection section of the circuit board and ensure the stability of the plug-in. The orthographic projection of the fixing plate and the plug-in along the second direction is located within the main body of the board, and the plug-in is fixedly connected to the fixing plate, so that the plug-in and the fixing plate are both located on the main body of the isolation plate. The isolation plate does not need to set a bracket on the side of the cell, saving the material cost of the bracket, saving the battery compartment space in the battery pack, and improving the energy density of the battery pack. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the battery pack structure of this utility model;

[0021] Figure 2 yes Figure 1 A schematic diagram of the battery pack explosion;

[0022] Figure 3 yes Figure 2 An enlarged view of point A of the battery pack;

[0023] Figure 4 yes Figure 3 A schematic diagram of the assembly structure of the battery pack's separator and busbar;

[0024] Figure 5 yes Figure 3 A schematic diagram of the assembly structure of the battery pack's circuit board, connectors, mounting plate, and data acquisition chip.

[0025] In the diagram, 1 is the battery cell, 2 is the integrated busbar, 21 is the isolation plate, 211 is the main body of the board, 212 is the snap-fit ​​component, 2121 is the claw, 2122 is the limiting plate, 2123 is the support plate, 2124 is the assembly cavity, 213 is the isolation cavity, 22 is the circuit board, 221 is the acquisition section, 222 is the connection section, 223 is the bending section, 23 is the plug-in component, 24 is the fixing plate, 25 is the busbar, 26 is the acquisition plate, 3 is the housing, 31 is the receiving cavity, X is the first direction, and Z is the second direction. Detailed Implementation

[0026] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0027] A preferred embodiment of the battery pack of this utility model is as follows: Figures 1 to 5As shown, the battery pack includes multiple battery cells 1 and an integrated busbar 2. The battery pack also has a first direction X and a second direction Z that are perpendicular to each other. In this embodiment, the first direction X is the length direction of the battery pack, and the second direction Z is the height direction of the battery pack. Each battery cell 1 is arranged along the first direction X.

[0028] like Figure 1 and Figure 2 As shown, the integrated busbar 2 includes an isolation plate 21, a circuit board 22, connectors 23, and a fixing plate 24. The isolation plate 21 is used to insulate and isolate the battery cells 1 and the battery pack housing 3, enhancing the insulation performance of the battery pack. The circuit board 22 electrically connects the connectors 23 and multiple battery cells 1 to collect information such as temperature and voltage of each battery cell 1, which is then transmitted to the battery pack management system via the connectors 23. The fixing plate 24 is used to fix the connectors 23.

[0029] like Figure 5 As shown, the circuit board 22 includes an interconnected acquisition section 221 and a connection section 222. The acquisition section 221 is electrically connected to multiple battery cells 1, and the connection section 222 is electrically connected to the connector 23. The acquisition section 221 can acquire information such as temperature and voltage of the battery cells 1, and then transmit it to the connector 23 via the connection section 222. The connection section 222 is fixedly connected to the fixing plate 24 to fix the connection section 222. Compared with directly mounting the connector 23 on the surface of the circuit board 22, the circuit board 22 needs to be wider to avoid the connector 23, which occupies the wiring space of the circuit board 22. After arranging the connector 23 and the connection section 222 on the fixing plate 24, the circuit board 22 does not need to avoid the connector 23, which can reduce the width of the circuit board 22 and improve the material utilization rate.

[0030] like Figure 3 As shown, the fixing plate 24 is connected to the side of the connecting section 222 away from the plug-in 23 along the second direction Z, and the isolation plate 21 is connected to the side of the fixing plate 24 close to the cell 1 along the second direction Z. That is, along the second direction Z, the plug-in 23, the connecting section 222, the fixing plate 24, and the isolation plate 21 are arranged in sequence. The connecting section 222 is fixed between the plug-in 23 and the fixing plate 24, and the fixing plate 24 is disposed between the connecting section 222 and the isolation plate 21.

[0031] like Figure 4As shown, the separator 21 includes a main body 211 and a snap-fit ​​component 212. The snap-fit ​​component 212 is fixedly connected to the main body 211. The fixing plate 24 is snap-fitted to the snap-fit ​​component 212. After the connector 23, connecting section 222, and fixing plate 24 are fixed as a whole, they are snap-fitted to the snap-fit ​​component 212 and then assembled on the separator 21, facilitating the overall disassembly of the fixing plate 24. The main body 211 extends along the first direction X and covers part of the battery cell 1 along the second direction Z. The orthographic projections of the fixing plate 24 and the connector 23 along the second direction Z are both located within the main body 211, ensuring that the fixing plate 24 and the connector 23 are both located within the coverage area of ​​the battery cell 1 in the second direction Z. This eliminates the need to add a bracket outside the battery cell 1, so that the overall size of the separator 21 along the first direction X remains unchanged compared to the existing size, improving the space utilization of the battery pack.

[0032] The battery pack has a fixing plate 24 on the side of the connection section 222 away from the plug 23 to reinforce the connection section 222 of the circuit board 22 and ensure the stability of the plug 23. The orthographic projection of the fixing plate 24 and the plug 23 along the second direction Z is located on the board body 211, and the plug 23 is fixedly connected to the fixing plate 24, so that the plug 23 and the fixing plate 24 are both located on the board body 211 of the isolation plate 21. The isolation plate 21 does not need to set a bracket on the side of the cell 1, which saves the material cost of the bracket, saves the battery compartment space in the battery pack, and improves the energy density of the battery pack.

[0033] In some embodiments, the snap-fit ​​member 212 includes snap-fit ​​claws 2121, at least two snap-fit ​​claws 2121 are spaced apart, and the fixing plate 24 is at least partially located between each snap-fit ​​claw 2121, and the fixing plate 24 is snap-fitted with each snap-fit ​​claw 2121.

[0034] like Figure 4 As shown, the latching member 212 is formed by at least two latches 2121, and the fixing plate 24 is at least partially located between the latches 2121. While latching the fixing plate 24, the latches 2121 also limit the movement of the fixing plate 24, preventing it from moving in a direction perpendicular to the second direction Z. In this embodiment, there are two latches 2121, arranged on both sides of the fixing plate 24 in the first direction X, with a gap between them along the first direction X to increase the stability of the fixing plate 24.

[0035] In some embodiments, the snap-fit ​​component 212 further includes a limiting plate 2122, which is fixedly connected to the plate body 211. The limiting plate 2122 and each claw 2121 enclose an assembly cavity 2124, and a fixing plate 24 is disposed in the assembly cavity 2124.

[0036] The limiting plate 2122 is connected to the main body 211 and, together with the claws 2121, forms an assembly cavity 2124. The limiting plate 2122 can fix and limit the assembly plate, preventing the fixing plate 24 and the connector 23 from moving. In addition, after the fixing plate 24 is arranged in the assembly cavity 2124, it can increase the creepage distance between the circuit board 22 and the busbar 25, thereby improving the safety of the battery pack.

[0037] In some embodiments, the snap-fit ​​member 212 further includes a support plate 2123, which is fixedly connected to the limiting plate 2122. The support plate 2123 is located in the assembly cavity 2124. Along the second direction Z, the fixing plate 24 is connected to the side of the support plate 2123 away from the plate body 211.

[0038] The support plate 2123 is fixedly connected to the limiting plate 2122 and supports the fixing plate 24 along the second direction Z. At the same time, the claw 2121 engages with the fixing plate 24. The support plate 2123 and the claw 2121 cooperate with each other to limit the fixing plate 24 in the second direction Z and prevent the fixing plate 24 from moving along the second direction Z.

[0039] In some embodiments, at least two support plates 2123 are provided, and each support plate 2123 is spaced apart along the first direction X.

[0040] Multiple support plates 2123 are spaced apart along the first direction X, which can provide multi-point support for the fixed plate 24 and increase the stability of the fixed plate 24 and the connector 23.

[0041] In some embodiments, the circuit board 22 further includes a bending section 223, which is connected between the acquisition section 221 and the connection section 222; relative to the acquisition section 221, the bending section 223 bends away from the battery cell 1 along the second direction Z.

[0042] like Figure 5 As shown, the circuit board 22 is formed by the acquisition section 221, the bending section 223 and the connecting section 222. Since the bending section 223 bends relative to the acquisition section 221 in the second direction Z away from the cell 1, the connecting section 222 is parallel to the acquisition section 221 and is spaced apart in the vertical direction after the bending section 223 is bent, which can reduce the space occupied by the circuit board 22 in the first direction X.

[0043] In some embodiments, the battery pack further includes a housing 3, which has a receiving cavity 31 in which multiple battery cells 1 and an integrated busbar 2 are disposed; an isolation plate 21 is fixedly connected to the housing 3, and the insertion interface of the plug 23 is disposed on one side of the bending section 223 along the first direction X.

[0044] The battery pack housing 3 can protect the various internal components. After the isolation plate 21 is fixedly connected to the housing 3, the integrated busbar 2 and the housing 3 can be integrated into one unit. The plug interface of the connector 23 is set along the first direction X toward the bending section 223, so that the plug interface of the connector 23 faces outward, which is convenient for plugging and unplugging, and at the same time improves the space utilization of the battery pack.

[0045] In some embodiments, the integrated busbar 2 further includes a busbar 25, which is electrically connected to the battery cell 1. The board body 211 has an isolation cavity 213, the busbar 25 is disposed in the isolation cavity 213, and the acquisition section 221 is electrically connected to the busbar 25.

[0046] like Figure 3 As shown, an isolation cavity 213 is provided on the main body 211 to assemble the busbar 25. The isolation cavity 213 can increase the creepage distance between the busbar 25 and the main body 211, thereby improving the insulation effect between the two.

[0047] In some embodiments, the integrated busbar 2 further includes a data acquisition piece 26, which is electrically connected to the data acquisition segment 221 and the busbar 25.

[0048] The acquisition piece 26 is electrically connected to the acquisition segment 221 and the bus 25. The acquisition piece 26 can acquire information such as the voltage of the bus 25 and feed it back to the acquisition segment 221. In this embodiment, the acquisition piece 26 is a nickel sheet, and the acquisition piece 26 is welded and fixed to the bus 25.

[0049] This utility model also provides a preferred embodiment of an electrical device, including a battery pack. The specific structure of the battery pack is the same as that of the battery pack described in any of the above embodiments, and will not be repeated here.

[0050] In summary, this utility model embodiment provides a battery pack and electrical equipment, which has a fixing plate on the side of the connection section away from the plug-in to reinforce the connection section of the circuit board and ensure the stability of the plug-in. The orthographic projection of the fixing plate and the plug-in along the second direction is located on the main body of the plate, and the plug-in is fixedly connected to the fixing plate, so that the plug-in and the fixing plate are both located on the main body of the isolation plate. The isolation plate does not need to set up a bracket on the side of the cell, which saves the material cost of the bracket, saves the battery compartment space in the battery pack, and improves the energy density of the battery pack.

[0051] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A battery pack, characterized in that, The battery pack has a first direction (X) and a second direction (Z) that are perpendicular to each other, and the battery pack includes: Multiple battery cells (1) are arranged along the first direction (X); An integrated busbar (2) includes an isolation plate (21), a circuit board (22), a connector (23), and a fixing plate (24). The circuit board (22) includes a data acquisition section (221) and a connection section (222) connected to each other. The data acquisition section (221) is electrically connected to a plurality of the battery cells (1). The connection section (222) is electrically connected to the connector (23). The connection section (222) is fixedly connected to the fixing plate (24). The fixing plate (24) is connected to the side of the connection section (222) away from the connector (23). The isolation plate (21) is connected to the side of the fixing plate (24) close to the battery cell (1). The isolation plate (21) includes a plate body (211) and a snap-fit ​​member (212) fixedly connected to the plate body (211). The fixing plate (24) is snapped into the snap-fit ​​member (212). The plate body (211) extends along the first direction (X). The orthographic projections of the fixing plate (24) and the plug-in member (23) along the second direction (Z) are both located within the plate body (211).

2. The battery pack according to claim 1, characterized in that, The snap-fit ​​component (212) includes a snap-fit ​​claw (2121), at least two snap-fit ​​claws (2121) are spaced apart, and the fixing plate (24) is at least partially located between each of the snap-fit ​​claws (2121), and the fixing plate (24) is snapped into each of the snap-fit ​​claws (2121).

3. The battery pack according to claim 2, characterized in that, The snap-fit ​​component (212) further includes a limiting plate (2122), which is fixedly connected to the plate body (211). The limiting plate (2122) and each of the claws (2121) enclose an assembly cavity (2124), and the fixing plate (24) is disposed in the assembly cavity (2124).

4. The battery pack according to claim 3, characterized in that, The snap-fit ​​component (212) further includes a support plate (2123), which is fixedly connected to the limiting plate (2122). The support plate (2123) is located in the assembly cavity (2124) along the second direction (Z). The fixing plate (24) is connected to the side of the support plate (2123) away from the plate body (211).

5. The battery pack according to claim 4, characterized in that, At least two support plates (2123) are provided, and each support plate (2123) is spaced apart along the first direction (X).

6. The battery pack according to any one of claims 1-5, characterized in that, The circuit board (22) further includes a bending section (223) which is connected between the acquisition section (221) and the connection section (222); relative to the acquisition section (221), the bending section (223) bends away from the battery cell (1) along the second direction (Z).

7. The battery pack according to claim 6, characterized in that, The battery pack also includes a housing (3), which has a receiving cavity (31) in which multiple battery cells (1) and the integrated busbar (2) are disposed; The isolation plate (21) is fixedly connected to the box body (3), and the insertion interface of the plug (23) is arranged along the first direction (X) toward the side of the bent section (223).

8. The battery pack according to any one of claims 1-5, characterized in that, The integrated busbar (2) also includes a busbar (25), which is electrically connected to the battery cell (1). The board body (211) has an isolation cavity (213), the busbar (25) is located in the isolation cavity (213), and the acquisition section (221) is electrically connected to the busbar (25).

9. The battery pack according to claim 8, characterized in that, The integrated busbar (2) also includes a data acquisition piece (26), which is electrically connected to the data acquisition section and the busbar (25).

10. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1-9.

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