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, and the box body comprises a frame beam and a top cover; the battery cell is assembled in the box body, the slave control component comprises a shell and a plug-in port, the shell is fixedly connected with the frame beam, and the plug-in port is embedded in the shell and arranged towards the top cover; 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 electrically connected with the battery cell; and the connecting piece is fixedly connected with the main body part and the top cover. The connector of the flexible circuit board is connected with the plugging port in a vertical plugging manner, so that the surplus vertical space of the battery pack can be utilized, and the external space of the battery pack when the upper cover is not assembled can be utilized; and the connecting 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, and the amplitude of the flexible circuit board in a vibration working condition of the battery pack is effectively reduced.

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 control design can occupy a smaller space on the plane, and its own width overlaps with the Z-direction space of the battery pack, so the slave control can be arranged in a limited space to avoid affecting the layout of other components or battery cells. The connector of the FPC (flexible circuit board) needs to be plugged into the slave control to realize signal transmission. The flat plug-in method can reduce the length of the FPC. However, the problem with the flat plug connector is that if there is no space in the horizontal space around the connector for the connector to be plugged in, the flat plug-in method cannot be used for connection. In addition, during the use of the battery pack, under the vibration condition of the vehicle, it is necessary to provide an effective and stable connection method for the connector and the BMS slave control to avoid the FPC swinging due to vibration, causing the connection to become loose and affecting information collection. 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 a flexible circuit board cannot be flatly plugged into a connector and the connection is loose; 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 top cover, wherein the frame beam and the top cover enclose an assembly space;

[0008] A battery cell, wherein the battery cell is assembled in the assembly space,

[0009] A slave control component is arranged in the assembly space, the slave control component includes a shell and a plug port, the shell is fixedly connected to a side of the frame beam facing the assembly space, and the plug port is embedded in the shell and arranged toward the top cover;

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

[0011] A connecting piece is arranged in the assembly space, and the connecting piece fixedly connects the main body and the top cover.

[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 connecting piece is arranged between the suspended section and the top cover, and the connecting piece is connected to the suspended section.

[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 connecting member is an elastic member.

[0015] Preferably, the connecting member is a foam member, and the connecting member and the top cover, as well as the connecting member and the suspended section are all bonded and fixed.

[0016] Preferably, the slave control component further includes a control board, the plug port is electrically connected to the control board, the housing has a card slot, and the control board is card-mounted in the card slot.

[0017] Preferably, the frame beam includes a fixed platform extending toward the slave-controlled component, the fixed platform has an exhaust passage, and the slave-controlled 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 locking boss arranged on the side of the shell close to the frame beam, the plug-in port is embedded in the shell, and a plurality of locking bosses are arranged at intervals, each locking boss is fixedly connected to the top plate, and the shell is supported on the support plate and relies on and cooperates with the vertical plate.

[0019] Preferably, the slave control component further includes a locking ear portion, there are multiple locking ears and they are fixedly connected to the outer shell, the frame beam has a locking hole corresponding to each of the locking ears, and the locking ears are fixedly connected to the locking holes.

[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 embodiment of the present invention have the following beneficial effects: the plug-in port of the control component is arranged toward the top cover, and the connector of the flexible circuit board is connected to the plug-in port in a vertical plug-in manner, which can further utilize the redundant vertical space of the battery pack, and in actual operation, the plug-in action occurs before the top cover of the box is closed, which can further utilize the external space of the battery pack when the top cover is not assembled, and perform the plug-in operation in a vertical plug-in manner; the battery pack also includes a connector, which fixes the main body and the top cover together, and after the flexible circuit board forms end points at the battery cell and the plug-in port, the connector 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the battery pack of the present utility model;

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

[0024] Figure 3 yes Figure 1 A cross-sectional view of a battery pack;

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

[0026] Figure 5 yes Figure 4 The main view of the partial view;

[0027] Figure 6 yes Figure 1 Schematic diagram of the assembly of the slave control components and the flexible circuit board of the battery pack;

[0028] Figure 7 yes Figure 6 A local enlarged schematic diagram of point C;

[0029] Figure 8 yes Figure 7 Explosion diagram of

[0030] Figure 9 This is a schematic diagram of the structure in which the slave control component of the battery pack of the present invention is connected to the frame beam via a locking ear;

[0031] Figure 10 yes Figure 9 The structural diagram of the frame beam after the control attachment is omitted;

[0032] Figure 11 yes Figure 9 Exploded diagram of the slave control component.

[0033] In the figure, 1. box body, 11. frame beam, 111. fixed platform, 1111. top plate, 1112. vertical plate, 1113. support plate, 112. exhaust channel, 113. locking hole, 12. top cover, 2. battery cell, 3. slave control component, 31. outer shell, 311. slot, 312. shell, 313. locking boss, 32. plug-in port, 33. control board, 34. locking ear, 4. flexible circuit board, 41. connector, 42. main body, 421. fixed section, 422. suspended section, 5. connector. DETAILED DESCRIPTION

[0034] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0035] A preferred embodiment of a battery pack of the present utility model is as follows: Figures 1 to 11 As shown, the battery pack includes a box body 1, battery cells 2, slave control components 3, flexible circuit boards 4 and connectors 5. The frame beam 11 and the top cover 12 form an assembly space. The battery cells 2, slave control components 3, flexible circuit boards 4 and connectors 5 are all arranged in the assembly space. The box body 1 protects the internal components.

[0036] In this embodiment, the box body 1 has a rectangular structure and includes a frame beam 11 and a top cover 12. There are multiple frame beams 11, each of which is fixedly connected to the top cover 12. An assembly space is defined between the frame beams 11 and the top cover 12. The battery cells 2, slave control components 3, flexible circuit boards 4, and connectors 5 are all arranged in the assembly space, with the box body 1 protecting each component.

[0037] 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.

[0038] The slave control component 3 includes a housing 31 and a plug port 32. The housing 31 is fixedly connected to the side of the frame beam 11 of the box body 1 facing the assembly space. The plug port 32 is embedded in the housing 31 and arranged toward the top cover 12. The housing 31 and the frame beam 11 can be fixedly connected by accessories. The housing 31 has an opening for the plug port 32 to be partially embedded therein, facilitating electrical connection between the plug port 32 and the flexible circuit board 4.

[0039] The opening on the shell 31 is set on the top surface in the height direction, and the plug-in port 32 is arranged toward the top cover 12. When the flexible circuit board 4 is plugged into the plug-in port 32, it is connected by vertical plugging along the height direction of the battery pack, which can further utilize the redundant height space of the battery pack. Moreover, in the actual operation process, the plug-in action occurs before the process of closing the top cover 12 of the battery pack, so the external space of the battery pack when the cover is not closed can be further utilized, and the plug-in operation can be performed by vertical plug-in.

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

[0041] Connector 5 securely connects main body 42 to top cover 12 and is positioned between battery cell 2 and slave control component 3. When connector 41 of flexible circuit board 4 is plugged into plug port 32, main body 42 located on the side of connector 41 closest to battery cell 2 is securely connected to top cover 12 via connector 5, securing the portion of main body 42 located between battery cell 2 and slave control component 3. After the flexible circuit board 4 is secured at its endpoints between battery cell 2 and plug port 32, connector 5 forms the center fixing point for the flexible circuit board 4. This reduces the length of the flexible circuit board 4 in its free position between battery cell 2 and plug port 32, effectively reducing the amplitude of the flexible circuit board 4 during battery pack vibration.

[0042] The plug-in port 32 of the slave control component 3 of the battery pack is arranged toward the top cover 12, and the connector 41 of the flexible circuit board 4 is connected to the plug-in port 32 in a vertical plug-in manner, which can further utilize the surplus vertical space of the battery pack. Moreover, during actual operation, the plug-in action occurs before the closing process of the top cover 12 of the box body 1, and the external space of the battery pack when the upper cover is not assembled can be further utilized to perform the plug-in operation in a vertical plug-in manner; the battery pack also includes a connector 5, which fixes the main body 42 and the top cover 12 together. After the flexible circuit board 4 forms an end point fixation at the battery cell 2 and the plug-in port 32, the connector 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-in 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-in port 32.

[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 connecting member 5 is arranged between the suspended section 422 and the top cover 12, and the connecting member 5 is connected to the suspended section 422.

[0044] like Figure 2 、 Figure 4 、 Figure 5 and Figure 7 As shown, the main body 42 adopts a vertical plug-in structure, and there is a distance between the battery cell 2 and the plug-in port 32 of the slave control component 3. The suspended section 422 can compensate for the distance between the fixed section 421 and the connector 41 to ensure that the connector 41 and the plug-in port 32 are vertically plugged in.

[0045] 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.

[0046] like Figure 2 and Figure 7As shown, the dimension L1 of the suspended section 422 is the total length of the suspended section 422 after bending, and the minimum distance L2 between the fixed section 421 and the connector 41 is the straight-line distance. When L1>L2, the suspended section 422 of the flexible circuit board 4 has redundancy, preventing the flexible circuit board 4 from being strained. If the flexible circuit board 4 is in a strained state, and external vibrations cause the amplitude to be transmitted to the suspended section 422, the main body 42 of the FPC will swing, and the connection between the connector 41 and the plug port 32 of the flexible circuit board 4 will be subjected to tension, which may cause the connection to fail. Whether the plug connection between the connector 41 and the plug port is disconnected, or the solder connection between the suspended section 422 of the flexible circuit board 4 and the connector 41 is broken, it will cause information transmission problems. When the suspended section 422 is not in a strained state, the suspended section 422 absorbs the vibration through its own deformation, preventing tension on the connector 41.

[0047] Preferably, the connecting member 5 is an elastic member.

[0048] Connector 5 is an elastic member that provides a buffering effect on the connection between suspended section 422 and top cover 12. When top cover 12 is subjected to downward force, connector 5 deforms to absorb and mitigate the force transmitted in that area, preventing deformation or even tearing and breaking of flexible circuit board 4 under high force. Furthermore, a central fixing point for suspended section 422 is provided, reducing the amplitude of suspended section 422 during vibration. This also prevents repeated swinging of suspended section 422, which could pull on the connection structure with connector 5 and cause damage to suspended section 422 due to repeated hard friction on flexible circuit board 4, thereby affecting the transmission of electrical signals.

[0049] In other embodiments, the connecting member 5 may also be a structural adhesive layer, and the suspended section 422 and the top cover 12 are bonded and fixed.

[0050] Preferably, the connecting member 5 is a foam member, and the connecting member 5 and the top cover 12 as well as the connecting member 5 and the suspended section 422 are all bonded and fixed.

[0051] The foam piece itself has good elasticity and can reduce the amplitude of the suspended section 422 by its own deformation. In addition, adhesive backing can be provided on both sides of the foam piece to facilitate the bonding of the top cover 12 and the suspended section 422, thereby facilitating the connection and fixation of the top cover 12 and the suspended section 422.

[0052] Preferably, the slave control component 3 further includes a control board 33 , the plug port 32 is electrically connected to the control board 33 , the housing 31 has a card slot 311 , and the control board 33 is card-mounted in the card slot 311 .

[0053] like Figure 8As shown, the control board 33 is welded to the PIN pin of the plug port 32 to achieve circuit connection. The control board 33 is clamped in the clamping slot 311, which can limit the control board 33 so that the control board 33 can be fixed in the cavity of the housing 31.

[0054] In other embodiments, Figure 11 As shown, a protruding locking column is provided on the housing 31 , and an opening corresponding to the locking column is opened on the control board 33 , and a screw fastener passes through the opening and is fixedly connected to the locking column on the housing 31 to fix the control board 33 .

[0055] Preferably, the frame beam 11 includes a fixing platform 111 extending toward the slave control component 3 . The fixing platform 111 has an exhaust passage 112 . The slave control component 3 is fixedly connected to the fixing platform 111 .

[0056] A fixed platform 111 is formed on the frame beam 11, and an exhaust channel 112 is provided within 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 within the fixed platform 111. After the fixed platform 111 extends into the assembly space, the space inside it is increased, facilitating the installation of the exhaust channel 112. In other embodiments, the exhaust channel 112 can also be directly arranged within the width space of the frame beam 11.

[0057] 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.

[0058] 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 312 and a locking boss 313 arranged on the side of the shell 312 close to the frame beam 11, the plug-in port 32 is embedded in the shell 312, and a plurality of locking bosses 313 are arranged at intervals, each locking boss 313 is fixedly connected to the top plate 1111, and the shell 312 is supported on the support plate 1113 and relies on the vertical plate 1112 for cooperation.

[0059] 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 locking boss 313 on the housing 312 of the slave control component 3, and fasteners are used to achieve locking and fixing between the locking boss 313 and the top plate 1111. The vertical plate 1112 and the support plate 1113 can be connected to the large surface of the housing 312 of the slave control component 3 to achieve support for 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.

[0060] The support plate 1113 protrudes outward from one side of the slave control component 3. The shell 312 of the housing 31 of the slave control component 3 can be fixedly connected to the support plate 1113 to provide support for the shell 312. In other embodiments, the locking boss 313 on the shell 312 can also be replaced with a fixed rib or multiple fixing plates. Glue or adhesive-backed foam can also be added between the connection point of the slave control component 3 and the fixed platform 111 to not only connect the two, but also provide a buffering and shock-absorbing effect to improve the connection reliability.

[0061] Preferably, the slave control component 3 further includes a locking ear 34 , which is provided in plurality and fixedly connected to the outer shell 31 , and the frame beam 11 has a locking hole 113 corresponding to each locking ear 34 , and the locking ear 34 is fixedly connected to the locking hole 113 .

[0062] In this embodiment, the locking ears 34 are arranged on one side of the housing 31 near the frame beam 11. There are four locking ears 34 spaced apart in a rectangular pattern. The frame beam 11 has four locking holes 113 spaced apart in a matrix pattern. The locking ears 34 correspond one-to-one with the locking holes 113 and are fixedly connected by fasteners. The locking ears 34 and locking holes 113 securely connect the slave control component 3 and the frame beam 11, simplifying the assembly structure of the slave control component 3 and reducing the number of parts.

[0063] 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.

[0064] In summary, the embodiments of the present invention provide a battery pack and an electrical device, which are arranged from the plug-in port of the control component toward the top cover. The connector of the flexible circuit board is connected to the plug-in port in a vertical plug-in manner, which can further utilize the surplus vertical space of the battery pack. Moreover, during actual operation, the plug-in action occurs before the top cover sealing process of the box body, and the external space of the battery pack when the top cover is not assembled can be further utilized to perform the plug-in operation by vertical plug-in. The battery pack also includes a connector, which fixes the main body and the top cover together. After the flexible circuit board forms end points at the battery cell and the plug-in port, the connector 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.

[0065] 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 top cover, wherein the frame beam and the top cover enclose an assembly space; A battery cell, wherein the battery cell is assembled in the assembly space, A slave control component is arranged in the assembly space, the slave control component includes a shell and a plug port, the shell is fixedly connected to a side of the frame beam facing the assembly space, and the plug port is embedded in the shell and arranged toward the top cover; a flexible circuit board arranged in the assembly space, the flexible circuit board comprising a connector and a main body electrically connected to the connector, the connector being electrically connected to the plug port, and the main body being electrically connected to the battery cell; A connecting piece is arranged in the assembly space, and the connecting piece fixedly connects the main body and the top cover.

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 connecting piece is arranged between the suspended section and the top cover, and the connecting piece is connected to the suspended section.

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 connecting piece is an elastic piece.

5. The battery pack according to claim 4, characterized in that: The connecting piece is a foam piece, and the connecting piece and the top cover, as well as the connecting piece and the suspended section are all bonded and fixed.

6. The battery pack according to any one of claims 1 to 5, characterized in that: The slave control component further includes a control board, the plug port is electrically connected to the control board, the housing has a card slot, and the control board is card-mounted in the card slot.

7. The battery pack according to any one of claims 1 to 5, characterized in that: The frame beam includes a fixed platform extending toward the slave-controlled component. The fixed platform has an exhaust passage. The slave-controlled 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 locking boss arranged on the side of the shell close to the frame beam, the plug port is embedded in the shell, and a plurality of locking bosses are arranged at intervals, each of which is fixedly connected to the top plate, and the shell is supported on the support plate and relies on and cooperates with the vertical plate.

9. The battery pack according to any one of claims 1 to 5, characterized in that: The slave control component further includes a locking ear portion, which is provided in plurality and fixedly connected to the outer shell. The frame beam has a locking hole corresponding to each of the locking ears, and the locking ears are fixedly connected to the locking holes.

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

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