Battery pack and electric equipment

Abstract

The utility model relates to the technical field of new energy batteries, and discloses a battery pack and electric equipment, the battery pack comprises a box body, the box body comprises a frame beam and a bottom plate, and the frame beam and the bottom plate define an assembly space; the battery cell is assembled in the assembly space; the slave control part comprises a shell and a plug-in port, the shell and the frame beam are fixedly assembled, and the plug-in port is arranged on the side, facing the battery cell, of the shell; the flexible circuit board comprises a connector and a main body part, the connector is electrically connected with the plugging port, and the main body part is connected between the connector and the battery cell; the pressing plate piece is arranged on one side, facing the battery core, of the shell, the pressing plate piece and the shell are fixedly assembled, and the main body part is connected with the pressing plate piece. The pressing plate piece forms a middle fixing position of the flexible circuit board, so that the length of the flexible circuit board in a free state between the battery cell and the plugging port is reduced, the amplitude of the flexible circuit board in a battery pack vibration working condition can be effectively reduced, and the stability of the joint of the connector and the plugging port is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy batteries, in particular to a battery pack and electrical equipment. Background Art

[0002] The master-slave control structure of a battery pack BMS (battery management system) is a distributed architecture consisting of a master control and multiple slave controls, which are used to manage and maintain the status of the battery pack. In this structure, each slave control is responsible for managing a certain number of battery cells. The main responsibilities of the slave control are to implement voltage acquisition, temperature acquisition, and thermal management of the controlled battery cells to ensure that the battery pack operates within the normal operating range. The master control is responsible for higher-level functions such as current measurement, insulation testing, and communication with other devices (such as chargers and vehicle controllers). The master control realizes centralized management and control of the entire battery pack through the internal CAN bus cascade between the master control and the slave control. This master-slave control structure enables the BMS to more effectively monitor and manage the battery pack, improving the efficiency and safety of the battery.

[0003] Compared to a single-master-slave design, this single-master, multi-slave design is more suitable for complex systems requiring high scalability and flexibility. However, the drawback is that the slave controller requires a separate location, which takes up space inside the battery pack. Currently, two placement options are available: horizontal and vertical. The horizontal placement is suitable for designs with ample space in the XY direction, while the vertical placement is suitable for designs with ample horizontal space around the battery.

[0004] The vertical slave controller design can occupy a smaller space on the plane, and its own width overlaps with the Z-direction space of the battery pack. The slave controller can be arranged in a limited space to avoid affecting the layout of other components or battery cells. The connectors of the FPC (flexible circuit board) need to be plugged into the slave controller to realize signal transmission. The flat plug-in method can reduce the length of the FPC, but due to the height difference, the connection point between the slave controller and the FPC is prone to pulling during vibration, resulting in connection failure. In order to improve the modality of the entire package, the empty space needs to be filled with glue to achieve the overall connection. The foaming of the glue filling will cause the FPC to be affected and lifted, affecting the connection between the FPC and the BMS, and may cause the connection to become loose. Utility Model Content

[0005] The purpose of the utility model is to provide a battery pack to solve the problem in the prior art that the FPC connector of the battery pack is easily pulled and the connection is loose when it is inserted horizontally from the control panel; the utility model also provides an electrical device using the battery pack.

[0006] In order to achieve the above objectives, the present invention provides a battery pack, comprising:

[0007] A box body, the box body comprising a frame beam and a bottom plate, wherein the frame beam and the bottom plate enclose an assembly space;

[0008] a battery cell, the battery cell being arranged in the assembly space;

[0009] A slave control component is arranged in the assembly space, the slave control component includes a housing and a plug port, the housing is fixedly connected to the frame beam, and the plug port is arranged on a side of the housing facing the battery cell;

[0010] a flexible circuit board, the flexible circuit board being arranged in the assembly space, the flexible circuit board comprising a connector and a main body, the connector being electrically connected to the plug port, the main body being connected between the connector and the battery cell;

[0011] A pressing plate is arranged in the assembly space, the pressing plate is provided on a side of the shell facing the battery core, the pressing plate is fixedly connected to the shell, and the main body is connected to the pressing plate.

[0012] Preferably, the main body includes a fixed section and a suspended section, the fixed section is fixedly connected to the battery cell, the suspended section is connected between the fixed section and the connector, the pressure plate is connected to the suspended section, and the suspended section is located on the side of the pressure plate facing the base plate.

[0013] Preferably, the size of the suspended section is L1 mm, the minimum distance between the fixed section and the connector is L2 mm, and L1>L2.

[0014] Preferably, the battery pack further includes a first buffer component, which is arranged on a side of the pressing plate component facing the suspended section, and the first buffer component is fixedly connected to the suspended section and the pressing plate component.

[0015] Preferably, the battery pack further includes a second buffer component, the second buffer component is fixedly connected to a side of the flexible circuit board facing away from the pressing plate component, and the first buffer component is connected to the second buffer component.

[0016] Preferably, the pressure plate includes a main body and a protruding platform, the protruding platform is located on the side of the main body facing the shell, the protruding platform corresponds to the position of the suspended section, and the suspended section is connected to the protruding platform and the suspended section is connected to the main body.

[0017] Preferably, the frame beam includes a fixed platform extending toward the assembly space, the fixed platform has an exhaust passage communicating with the assembly space, and the slave control component is fixedly connected to the fixed platform.

[0018] Preferably, the fixed platform includes a top plate, a vertical plate and a support plate, the vertical plate is connected between the top plate and the support plate, the outer shell includes a shell and a fixed structure provided on the side of the shell close to the frame beam, the plug port is embedded in the shell, the fixed structure is fixedly connected to the top plate, the shell is supported on the support plate and leans against the vertical plate.

[0019] Preferably, the fixing structure includes a fixing plate, and the fixing plate is locked and fixed to the top plate.

[0020] The utility model also provides an electrical device, comprising the battery pack described in any of the above technical solutions.

[0021] Compared with the prior art, the battery pack and electrical equipment of the present invention have the following beneficial effects: a pressure plate is provided on the side of the housing of the control component toward the battery cell, the flexible circuit board is connected and fixed to the pressure plate, and after the flexible circuit board is fixed at the battery cell and the plug-in port to form end points, the pressure plate forms an intermediate fixed position of the flexible circuit board, which reduces the length of the flexible circuit board in a free state between the battery cell and the plug-in port, can effectively reduce the amplitude of the flexible circuit board in the vibration condition of the battery pack, and improve the stability of the connection between the connector and the plug-in port. At the same time, after the pressure plate is fixed to the flexible circuit board, the flexible circuit board can be controlled not to be lifted up, thereby avoiding loosening of the connection and improving the reliability of the signal connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of the battery pack of the present invention;

[0023] Figure 2 yes Figure 1 A partial enlarged schematic diagram of the battery pack at point A;

[0024] Figure 3 yes Figure 1 Schematic diagram of the battery pack with the control components and flexible circuit board omitted;

[0025] Figure 4 yes Figure 3 A partial enlarged schematic diagram of point B of the battery pack;

[0026] Figure 5 yes Figure 1 A cross-sectional view of a battery pack;

[0027] Figure 6 yes Figure 5 A partial enlarged schematic diagram of the battery pack at C;

[0028] Figure 7 yes Figure 5 The main view of the battery pack;

[0029] Figure 8 yes Figure 7 A partial enlarged schematic diagram of the battery pack at D;

[0030] Figure 9 yes Figure 8 An enlarged schematic diagram of the flexible circuit board of the battery pack at the suspended section;

[0031] Figure 10 yes Figure 3 Schematic diagram of the assembly structure of the control component and the pressure plate of the battery pack;

[0032] Figure 11 yes Figure 10 A local enlarged schematic diagram of point E;

[0033] Figure 12 yes Figure 11 Schematic diagram of the structure after the second buffer member is set on the pressure plate member.

[0034] In the figure, 1. box body, 11. frame beam, 111. fixed platform, 1111. top plate, 1112. vertical plate, 1113. support plate, 112. exhaust channel, 12. bottom plate, 2. battery cell, 3. slave control component, 31. outer shell, 311. shell, 312. fixed plate, 32. plug-in port, 4. flexible circuit board, 41. connector, 42. main body, 421. fixed section, 422. suspended section, 5. pressure plate, 51. main board, 52. protruding platform, 6. first buffer member, 7. second buffer member. DETAILED DESCRIPTION

[0035] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0036] A preferred embodiment of a battery pack of the present utility model is as follows: Figures 1 to 12 As shown, the battery pack includes a box body 1, battery cells 2, slave control components 3, flexible circuit boards 4 and pressure plates 5. The battery cells 2, slave control components 3, flexible circuit boards 4 and pressure plates 5 are all arranged in the box body 1, and the box body 1 can protect the components therein.

[0037] In this embodiment, the box body 1 is a rectangular structure, and the box body 1 includes a frame beam 11 and a bottom plate 12. There are multiple frame beams 11, and each frame beam 11 is perpendicular to the bottom plate 12 and fixedly connected to the bottom plate 12. The frame beams 11 and the bottom plate 12 form an assembly space, and the battery cells 2, slave control components 3, flexible circuit boards 4 and pressure plates 5 are all arranged in the assembly space, and the box body 1 is used to protect each component.

[0038] The slave control unit 3 is placed vertically, occupying a smaller space in the housing 1. The width of the slave control unit 3 overlaps with the height of the battery pack to avoid affecting the layout of other components and the battery cells 2. The slave control unit 3 is used to collect voltage and temperature data from the battery cells 2 and to perform thermal management.

[0039] The slave control component 3 includes a housing 31 and a plug port 32. The housing 31 is fixedly connected to the frame beam 11 of the housing 1. The plug port 32 is embedded in the housing 31 and is arranged on the side of the housing 31 facing the battery cell 2. The housing 31 and the frame beam 11 can be fixedly connected by accessories. The plug port 32 is used to electrically connect to the flexible circuit board 4. The plug port 32 is arranged toward the battery cell 2. When the flexible circuit board 4 is plugged into the plug port 32, it is connected in a flat manner, which can reduce the length of the flexible circuit board 4.

[0040] The flexible circuit board 4 includes a connector 41 and a main body 42. The connector 41 is electrically connected to the plug port 32. The main body 42 is connected between the connector 41 and the battery cell 2. The main body 42 is used to collect voltage and temperature signals from the battery cell 2 and transmit the collected signals to the slave control component 3 via the connector 41 and the plug port 32. In this embodiment, the main body 42 is provided with a temperature collection unit and a voltage collection unit. The temperature collection unit is connected to the battery cell 2 to collect the temperature of the battery cell 2, and the voltage collection unit is electrically connected to the bus bar on the battery cell 2 to collect voltage information.

[0041] The pressure plate 5 is positioned on the side of the housing 31 facing the battery cells 2. It is fixedly connected to the housing 31 and connected to the main body 42 of the flexible circuit board 4. Because the pressure plate 5 is positioned on the side of the housing 31 facing the battery cells 2, and the pressure plate 5 and the plug port 32 are located on the same side of the housing 31, when the flexible circuit board 4 is connected to the plug port 32 via the connector 41, the main body 42 connected to the connector 41 is connected to the pressure plate 5. With the main body 42 fixedly connected to the pressure plate 5, the pressure plate 5 forms a central anchor for the flexible circuit board 4, effectively reducing the amplitude of the flexible circuit board 4 during battery pack vibration.

[0042] The battery pack is provided with a pressing plate 5 on the side of the housing 31 of the control component 3 toward the battery cell 2, and the flexible circuit board 4 is connected and fixed to the pressing plate 5. After the flexible circuit board 4 forms an end point fixation at the battery cell 2 and the plug port 32, the pressing plate 5 forms an intermediate fixed position of the flexible circuit board 4, reducing the length of the flexible circuit board 4 in a free state between the battery cell 2 and the plug port 32, which can effectively reduce the amplitude of the flexible circuit board 4 in the vibration condition of the battery pack, and improve the stability of the connection between the connector 41 and the plug port 32. At the same time, after the pressing plate 5 is fixed to the flexible circuit board 4, it can also control the flexible circuit board 4 from being lifted up, avoid loosening of the connection, and improve the reliability of the signal connection.

[0043] Preferably, the main body 42 includes a fixed section 421 and a suspended section 422, the fixed section 421 is fixedly connected to the battery cell 2, the suspended section 422 is connected between the fixed section 421 and the connector 41, the pressure plate 5 is connected to the suspended section 422, and the suspended section 422 is located on the side of the pressure plate 5 facing the bottom plate 12.

[0044] like Figure 4 、 Figure 6 、 Figure 8 、 Figure 9 As shown, when the slave control component 3 adopts a flat plug-in structure, there is a height difference between the plug-in port 32 and the fixed section 421 of the flexible circuit board 4. The suspended section 422 can compensate for the height difference to ensure that the connector 41 of the flexible circuit board 4 is horizontally plugged into the plug-in port 32.

[0045] The suspended section 422 is located on the side of the pressure plate 5 facing the bottom plate 12, so that the pressure plate 5 presses down the suspended section 422. During actual operation, foam glue will be filled between the slave control component 3 and the battery cell 2. During the foaming and expansion process, the foam glue will act on the flexible circuit board 4, causing the flexible circuit board 4 to be lifted up. At this time, the pressure plate 5 will play a limiting role, so that the flexible circuit board 4 will not be lifted up by the foam glue, causing the connector 41 to be pulled.

[0046] In other embodiments, the suspended section 422 may also be located above the pressing plate 5 , so that the pressing plate 5 presses upward against the suspended section 422 .

[0047] Preferably, the size of the suspended section 422 is L1 mm, the minimum distance between the fixed section 421 and the connector 41 is L2 mm, and L1>L2.

[0048] like Figure 9 As shown, the dimension L1 of the suspended section 422 is the total length of the suspended section 422 after bending. The minimum distance L2 between the fixed section 421 and the connector 41 is the straight-line distance. When L1>L2, the length of the suspended section 422 is redundant, preventing the flexible circuit board 4 from being strained. If the flexible circuit board 4 is in a strained state, and external vibrations are transmitted to this section, the fixed section 421 of the flexible circuit board 4 will swing, causing tension between the connector 41 and the plug port 32, potentially leading to failure of the connection. Whether the connector 41 and the plug port 32 become disconnected, or the solder joint between the suspended section 422 of the flexible circuit board 4 and the connector 41 breaks, these problems can cause information transmission problems. When the suspended section 422 is not in a strained state, it absorbs vibrations through its own deformation, preventing tension on the connector 41.

[0049] Preferably, the battery pack further includes a first buffer member 6 , which is arranged on a side of the pressing plate member 5 facing the suspended section 422 , and the first buffer member 6 is fixedly connected to the suspended section 422 and the pressing plate member 5 .

[0050] like Figure 10 and Figure 11 As shown, a first buffer member 6 is provided on the side of the pressure plate member 5 facing the suspended section 422. The first buffer member 6 can provide buffering for the suspended section 422 and the pressure plate member 5, reduce the amplitude of the suspended section 422 during actual vibration, and prevent the suspended section 422 from being directly contacted with the pressure plate member 5 and repeatedly subjected to hard force friction, which may cause damage to the suspended section 422, resulting in damage to the line and affecting the transmission of electrical signals.

[0051] In this embodiment, the first buffer component 6 is a buffer foam, and there is adhesive between the buffer foam, the pressing plate component 5, and the suspended section 422 to achieve bonding and fixation of the two.

[0052] Preferably, the battery pack further includes a second buffer member 7 , which is fixedly connected to a side of the flexible circuit board 4 facing away from the pressing plate 5 , and the first buffer member 6 is connected to the second buffer member 7 .

[0053] like Figure 12 As shown, in this embodiment, the first buffer member 6 and the second buffer member 7 are arranged simultaneously on the lower side of the pressure plate member 5, the flexible circuit board 4 passes through the first buffer member 6 and the second buffer member 7, and the first buffer member 6 and the second buffer member 7 are connected to form a whole. The first buffer member 6 and the second buffer member 7 have a clamping effect on the suspended section 422 of the flexible circuit board 4, and at this time, the fixation of the suspended section 422 can be further ensured.

[0054] In this embodiment, the first buffer component 6 and the second buffer component 7 are both buffer foams, and the buffer foams are fixed together by adhesive.

[0055] Preferably, the pressure plate 5 includes a main body 51 and a protruding platform 52. The protruding platform 52 is located on the side of the main body 51 facing the outer shell 31. The protruding platform 52 corresponds to the position of the suspended section 422. The suspended section 422 is connected to the protruding platform 52 and the suspended section 422 is connected to the main body 51.

[0056] like Figure 10 、 Figure 11 and Figure 12 As shown, the protruding platform 52 is a portion of the main body 51 with an increased area on the side facing the housing 31. Providing the protruding platform 52 increases the area of ​​the connection between the suspended section 422 and the pressure plate 5, improving the stability of the connection. The protruding platform 52 protrudes toward one side of the housing 31 to reduce the external lateral space occupied. In other embodiments, the protruding platform 52 can also protrude toward one side of the battery cell 2.

[0057] Preferably, the frame beam 11 includes a fixing platform 111 extending toward the assembly space. The fixing platform 111 has an exhaust passage 112 communicating with the assembly space. The slave control component 3 is fixedly connected to the fixing platform 111 .

[0058] like Figures 5 to 8 As shown, a fixed platform 111 is formed on the frame beam 11, and an exhaust channel 112 is provided in the fixed platform 111. When thermal runaway occurs in the battery cell 2, gas can be discharged from the exhaust channel 112 to avoid affecting other battery cells 2. In this embodiment, the exhaust channel 112 is provided in the fixed platform 111. After the fixed platform 111 extends into the assembly space, the space inside it is increased, which facilitates the installation of the exhaust channel 112. In other embodiments, the exhaust channel 112 can also be directly arranged in the width space of the frame beam 11.

[0059] In this embodiment, the slave control component 3 is fixedly connected to the fixed platform 111. In other embodiments, a fixed point can also be set on the frame beam 11, and the slave control component 3 can be directly assembled on the frame beam 11, thereby reducing the need for additional fixed structures, effectively improving the space utilization of the battery pack, and reducing the number of components.

[0060] Preferably, the fixed platform 111 includes a top plate 1111, a vertical plate 1112 and a support plate 1113, the vertical plate 1112 is connected between the top plate 1111 and the support plate 1113, the outer shell 31 includes a shell 311 and a fixed structure provided on the side of the shell 311 close to the frame beam 11, the plug-in port 32 is embedded in the shell 311, the fixed structure is fixedly connected to the top plate 1111, the shell 311 is supported on the support plate 1113 and leans against the vertical plate 1112.

[0061] The fixed platform 111 is formed by interconnecting a top plate 1111, a vertical plate 1112, and a support plate 1113. The top plate 1111 can be connected to the fixed structure of the slave control component 3, and fasteners are used to achieve a locking fixation between the fixed structure and the top plate 1111. The vertical plate 1112 and the support plate 1113 can be connected to the large surface of the housing 311 of the slave control component 3 to support the slave control component 3, so that the slave control component 3 is connected and fixed to the fixed platform 111 in a vertical position.

[0062] The support plate 1113 protrudes outward from one side of the slave control component 3, and the shell 311 of the outer shell 31 of the slave control component 3 can be fixedly connected to the support plate 1113 to provide support for the shell 311. In other embodiments, the fixed connection between the fixed platform 111 and the slave control component 3 can be directly fixed by fasteners, omitting the support plate 1113 and the vertical plate 1112. Glue or foam with an adhesive backing can also be added between the connection point of the slave control component 3 and the fixed platform 111 to not only achieve the connection between the two, but also provide a buffering and shock absorption function to improve the reliability of the connection.

[0063] Preferably, the fixing structure includes a fixing plate (312), and the fixing plate (312) is locked and fixed to the top plate (1111).

[0064] like Figure 4 and Figure 6 As shown, the fixing plate (312) is a continuous structure, which can increase the stability of the connection between the slave control component 3 and the frame beam 11. In other embodiments, the fixing plate 312 on the housing 311 can also be replaced by fixing ribs or multiple bosses.

[0065] The present 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 in any of the above embodiments, and will not be repeated here.

[0066] In summary, the embodiments of the present invention provide a battery pack and an electrical device, which has a pressure plate member provided on the side of the housing of the control component toward the battery cell, the flexible circuit board is connected and fixed to the pressure plate member, and after the flexible circuit board forms end points at the battery cell and the plug-in port and is fixed, the pressure plate member forms an intermediate fixed position of the flexible circuit board, reducing the length of the flexible circuit board in a free state between the battery cell and the plug-in port, which can effectively reduce the amplitude of the flexible circuit board in the vibration condition of the battery pack and improve the stability of the connection between the connector and the plug-in port. At the same time, after the pressure plate member is fixed to the flexible circuit board, it can also control the flexible circuit board from being lifted up, avoid loosening of the connection, and improve the reliability of the signal connection.

[0067] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A battery pack, characterized in that: include: A box body, the box body comprising a frame beam and a bottom plate, wherein the frame beam and the bottom plate enclose an assembly space; a battery cell, the battery cell being arranged in the assembly space; A slave control component is arranged in the assembly space, the slave control component includes a housing and a plug port, the housing is fixedly connected to the frame beam, and the plug port is arranged on a side of the housing facing the battery cell; a flexible circuit board, the flexible circuit board being arranged in the assembly space, the flexible circuit board comprising a connector and a main body, the connector being electrically connected to the plug port, the main body being connected between the connector and the battery cell; A pressing plate is arranged in the assembly space, the pressing plate is provided on a side of the shell facing the battery core, the pressing plate is fixedly connected to the shell, and the main body is connected to the pressing plate.

2. The battery pack according to claim 1, wherein: The main body includes a fixed section and a suspended section, the fixed section is fixedly connected to the battery core, the suspended section is connected between the fixed section and the connector, the pressure plate is connected to the suspended section, and the suspended section is located on the side of the pressure plate facing the bottom plate.

3. The battery pack according to claim 2, wherein: The size of the suspended section is L1 mm, the minimum distance between the fixed section and the connector is L2 mm, and L1>L2.

4. The battery pack according to claim 2, wherein: The battery pack further includes a first buffer component, which is arranged on a side of the pressing plate component facing the suspended section, and the first buffer component is fixedly connected to the suspended section and the pressing plate component.

5. The battery pack according to claim 4, characterized in that: The battery pack further includes a second buffer component, which is fixedly connected to a side of the flexible circuit board facing away from the pressing plate component, and the first buffer component is connected to the second buffer component.

6. The battery pack according to claim 2, characterized in that: The pressure plate includes a main body and a protruding platform, the protruding platform is located on the side of the main body facing the shell, the protruding platform corresponds to the position of the suspended section, and the suspended section is connected to the protruding platform and the suspended section is connected to the main body.

7. The battery pack according to any one of claims 1 to 6, characterized in that: The frame beam includes a fixed platform extending toward the assembly space. The fixed platform has an exhaust passage communicating with the assembly space. The slave control component is fixedly connected to the fixed platform.

8. The battery pack according to claim 7, characterized in that: The fixed platform includes a top plate, a vertical plate and a support plate, the vertical plate is connected between the top plate and the support plate, the outer shell includes a shell and a fixed structure provided on the side of the shell close to the frame beam, the plug port is embedded in the shell, the fixed structure is fixedly connected to the top plate, the shell is supported on the support plate and leans against the vertical plate.

9. The battery pack according to claim 8, characterized in that: The fixing structure includes a fixing plate, and the fixing plate is locked and fixed to the top plate.

10. An electrical device, characterized in that: A battery pack comprising any one of claims 1 to 9.

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