PCU structure based on lithium battery

Abstract

The application discloses a PCU structure based on a lithium battery and relates to the technical field of lithium batteries. The application comprises a mounting frame, further comprises a plurality of support groups on the mounting frame, the support groups comprising a bearing plate and a support block fixedly arranged at the bottom of the bearing plate, and a wiring board and a control board respectively mounted on the plurality of bearing plates. The application connects a spring mechanism between the support block and the mounting frame, so that the support block can be horizontally buffered when the mounting frame vibrates, and the support block can be vertically buffered under the action of the U-shaped spring, thereby providing multi-directional buffering for the bearing plate and fully protecting the wiring board and the control board. When the vehicle bounces, the wiring board and the bearing plate can be protected to a certain extent, so that they are prevented from being severely damaged, thereby protecting the entire PCU structure and protecting the electric control system of the vehicle to a certain extent.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of lithium batteries, in particular to a PCU structure based on a lithium battery. BACKGROUND

[0002] In recent years, new energy automobile technology is rapidly advancing, and the popularity of new energy automobiles is increasing year by year. The core components of new energy automobiles mainly include storage batteries, electric control systems and motors. The most commonly used storage battery is a lithium battery. The electric control system mainly includes a PCU structure, which is responsible for loading voltage and current into the lithium battery pack when the vehicle is charging, and is responsible for the stable output of voltage and current of the lithium battery pack when the vehicle is running, so as to ensure that the input of motor power is in a stable state.

[0003] The PCU structure mainly consists of a control board and a wiring board installed together and electrically connected to each other to maintain signal cooperation. The wiring board is responsible for connecting with the lithium battery pack and the load element, and the control board is responsible for controlling the power supply operation of the wiring board. However, the vehicle inevitably suffers from severe jolts during operation, and external vibrations can easily affect the wiring board and the control board. The physical structure of the existing PCU structure is simple and usually does not have the function of buffering the wiring board and the control board when they are subjected to vibrations. A large number of relays are installed on the wiring board, and a large number of electronic components are installed on the control board. When subjected to severe vibrations, the corresponding components are prone to looseness or even cracking. Once a component is damaged, the entire PCU structure may not work normally, causing the entire electric control system to malfunction. This not only manifests as an inability to stably supply power to the motor, but also may manifest as uncontrolled power supply. Therefore, the physical structure of the existing PCU structure needs to be redesigned to fully protect the entire PCU structure when the vehicle is in a jolting state. SUMMARY

[0004] The purpose of the present application is to solve the problems in the background art. The present application provides a PCU structure based on a lithium battery.

[0005] In order to achieve the above purpose, the application specifically adopts the following technical scheme:

[0006] The PCU structure based on the lithium battery comprises:

[0007] a mounting frame;

[0008] a plurality of support groups located on the mounting frame, comprising a bearing plate and a support block fixedly arranged at the bottom of the bearing plate, a spring mechanism being horizontally connected between the support block and the mounting frame, and the top or bottom of the support block being connected with the mounting frame through a U spring;

[0009] A plurality of wiring boards and control boards are respectively mounted on the plurality of bearing plates.

[0010] By adopting the above technical scheme, the spring mechanism can provide horizontal buffering action between the mounting frame and the supporting block, and the U-shaped spring can provide vertical buffering action between the supporting block and the mounting frame, so as to maintain the buffering effect between the bearing plate and the mounting frame and reduce the vibration effect on the wiring board and the control board.

[0011] Further, the spring mechanism comprises a plurality of first springs respectively connected to the sides of the supporting block, and the other ends of the first springs are connected to the mounting frame.

[0012] By adopting the above technical scheme, the plurality of first springs are respectively located at different sides of the supporting block, so as to provide buffering effect in multiple directions, and the plurality of springs interact with each other to limit the respective movement, thereby achieving horizontal damping effect and reducing the horizontal movement amplitude of the bearing plate.

[0013] Further, a block is mounted on the mounting frame and contacts the supporting block, and the block is located on the side of the supporting block opposite to the U-shaped spring.

[0014] By adopting the above technical scheme, the movement of the supporting block towards one side can be limited, so that the U-shaped spring can only elastically move in one direction, thereby achieving damping effect on the U-shaped spring and maintaining the vertical damping effect of the supporting block.

[0015] Further, the U-shaped spring is located at the bottom of the supporting block, and the block is located at the top of the supporting block.

[0016] By adopting the above technical scheme, the supporting block is vertically placed on the U-shaped spring, so that the U-shaped spring only has compression movement, thereby being more consistent with the vertical movement mechanism of the supporting block.

[0017] Further, the block comprises a fixedly connected contact portion and a contact portion, the contact portion is fixedly connected to the mounting frame, the contact portion contacts the supporting block, and the contact portion is made of flexible material.

[0018] By adopting the above technical scheme, when the block contacts the supporting block, the hard contact between the block and the supporting block can be reduced, thereby reducing the noise generated during damping.

[0019] Further, the number of supporting blocks provided on the bearing plate is not less than two, and the supporting blocks are evenly distributed along the surface of the bearing plate.

[0020] By adopting the above technical scheme, the uniform distribution of the supporting blocks can provide stable buffering effect for the bearing plate, and the movement amplitudes of different parts of the bearing plate are consistent.

[0021] Further, the support blocks are vertically distributed between the bearing plates, and each of the two opposite surfaces of any vertically adjacent two support blocks is connected with a sleeve and a plug rod, the free end of the plug rod is movably inserted into the sleeve, and a second spring is connected between the free end of the plug rod and the inner wall of the sleeve.

[0022] By using the above technical scheme, the vertical distribution relationship between the plurality of support blocks can be used to limit the movement between any two vertically adjacent support blocks, thereby disrupting the rhythm of the simultaneous movement of the plurality of bearing plates in the same direction to avoid the occurrence of resonance phenomenon.

[0023] Further, the sleeve and the support block are universally connected, and the plug rod and the support block are universally connected.

[0024] By using the above technical scheme, the horizontal movement between any two vertically adjacent support blocks will not be affected, so that each support block can maintain free movement and will not be affected by movement.

[0025] Further, the bearing plate comprises a mounting layer and a contact layer, the support block is fixed on the mounting layer, the wiring board or the control board is arranged on the contact layer, and the contact layer is made of energy-absorbing material.

[0026] By using the above technical scheme, when the bearing plate is vibrated, the vibration of the wiring board and the control board can be reduced, thereby further protecting the wiring board and the control board.

[0027] Further, the wiring board or the control board is installed on the contact layer through a bolt assembly.

[0028] By using the above technical scheme, the wiring board and the control board can be disassembled at any time, and the wiring board and the control board can be maintained separately.

[0029] The beneficial effects of the present application are as follows:

[0030] 1. The present application connects a spring mechanism between the support block and the mounting frame, so that when the mounting frame is vibrated, the support block can be horizontally buffered, and through the action of the U spring, the support block can be vertically buffered, thereby ensuring that the bearing plate has buffering effect in all directions, buffering the wiring board and the control board mounted on the bearing plate, when the vehicle is bumpy, the wiring board and the bearing plate can be protected to a certain extent, preventing large hard damage, thereby protecting the entire PCU structure and protecting the vehicle's electronic control system to a certain extent.

[0031] 2、The application can play a buffering effect in multiple horizontal directions for the support block by independently arranging multiple first springs on multiple sides of the support block, so that the multiple first springs can interact with each other to limit the movement of each other, thereby reducing the movement amplitude of the support block during buffering movement, thereby playing a shock-absorbing effect.

[0032] 3、The application can limit the movement amplitude of the U spring by the block installed on the mounting frame, so that the support block only moves in one direction when moving vertically, thereby playing a damping effect on the U spring movement process, reducing the movement amplitude of the support block in the vertical direction, thereby playing a vertical shock-absorbing effect on the support block, and cooperating with multiple first springs to keep the support block on the mounting frame in each direction. Shock-absorbing effect, thereby effectively protecting the wiring board and control board installed on the bearing plate. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a perspective view of the application;

[0034] Figure 2 is a split view of the application;

[0035] Figure 3 is a partial structure perspective view of the application;

[0036] Figure 4 is another partial structure perspective view of the application and the effect view when the partial structure is cut;

[0037] Figure 5 is another partial structure perspective view of the application and the partial cutaway view of the mounting frame;

[0038] Figure 6 is another view of the application Figure 5 ;

[0039] Reference signs: 1, mounting frame; 2, bearing plate; 3, support block; 4, spring mechanism; 5, U spring; 6, wiring board; 7, control board; 8, first spring; 9, block; 10, contact part; 11, contact part; 12, sleeve; 13, insertion rod; 14, second spring; 15, mounting layer; 16, contact layer. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the embodiments of the application more clear, the technical scheme in the embodiments of the application will be described clearly and completely below in conjunction with the drawings in the embodiments of the application.

[0041] As Figures 1-6As shown, one embodiment of the application based on the PCU structure of the lithium battery is used for controlling the charging and discharging of the lithium battery pack in the electric control system of the new energy vehicle, so as to ensure the stable input and output of the electric energy and ensure the stable operation of the whole vehicle power supply system. The whole structure includes:

[0042] The mounting rack 1 is mounted on the frame of the whole vehicle, and the mounting rack 1 is an integrated frame structure with a mounting space inside. The bottom can be directly welded on the top of the lithium battery pack like the existing PCU structure shell. At the same time, the top of the mounting rack 1 is equipped with a corresponding cover, which is mounted on the top of the mounting rack 1 by screws. For details, please refer to Figure 1 and Figure 2 The cover can also have a certain physical protection effect and can also block dust;

[0043] A plurality of support groups are located on the mounting rack 1, which include a bearing plate 2 and a support block 3 fixedly arranged at the bottom of the bearing plate 2. The support block 3 can be welded on the bearing plate 2. The support block 3 and the mounting rack 1 are horizontally connected by a spring mechanism 4, so that the support block 3 and the mounting rack 1 have a horizontal buffering effect. The top or bottom of the support block 3 is connected with the mounting rack 1 by a U spring 5. The U spring 5 also has the nature of the spring mechanism 4, so it can also buffer the support block 3 vertically;

[0044] The wiring board 6 and the control board 7 are respectively mounted on the plurality of bearing plates 2. In order to facilitate installation, two support groups are designed here, so the bearing plates 2 are two, and the wiring board 6 and the control board 7 are respectively mounted on the top of the two bearing plates 2;

[0045] When the whole vehicle is jolted, the mounting rack 1 mounted inside will vibrate. At this time, the spring mechanism 4 cooperates with the U spring 5 to have a buffering effect in multiple directions on the support block 3, so as to avoid the hard collision between the bearing plate 2 and the mounting rack 1, thereby protecting the bearing plate 2 physically and protecting the wiring board 6 and the control board 7 mounted on the bearing plate 2 from hard impact, thereby protecting them and reducing the damage when the vehicle is in a jolted state for a long time. Therefore, compared with the existing PCU structure, the physical protection effect of the whole PCU structure is effectively improved, the service life is effectively prolonged, the occurrence of accidents during daily use of the whole vehicle is reduced, and the overall level of the whole vehicle is improved.

[0046] As Figure 5 and Figure 6As shown in some embodiments, the spring mechanism 4 includes a first spring 8 connected to each side of the support block 3, which has a rectangular block structure, and the other end of the first spring 8 is connected to the mounting frame 1. When the mounting frame 1 is horizontally vibrated, the first springs 8 are in contact with each other due to their positional relationship, so that when the support block 3 moves horizontally in any direction, one of the first springs 8 is in tension, and the first spring 8 on the opposite side of the first spring 8 is in contact, thereby affecting each other and limiting their elastic movement to reduce the horizontal movement of the support block 3, which is equivalent to a damping effect, thereby preventing the support block 3 from continuously shaking horizontally, preventing the wiring board 6 and the control board 7 mounted on the support block 3 from being continuously shaken, and effectively preventing the wiring board 6 and the control board 7 from being continuously shaken when the vehicle is in a bumpy state, thereby further protecting the wiring board 6 and the control board 7.

[0047] In order to limit the movement of the U spring 5, as shown in Figure 4 and Figure 5 In some embodiments, a block 9 is mounted on the mounting frame 1 and contacts the support block 3. When the support block 3 does not vertically shake, the block 9 only contacts the support block 3, and the block 9 is located on the side of the support block 3 opposite the U spring 5, i.e. the support block 3 is located between the U spring 5 and the block 9. When the mounting frame 1 is vertically vibrated, the U spring 5 will vertically elastically stretch due to the gravity of the support block 3. At this time, due to the contact of the block 9, the U spring 5 can only compress or only stretch, and cannot elastically move in both directions. If the U spring 5 is compressed and the stored energy cannot be continuously released and only returns to the normal position, it cannot continue to move, i.e. it cannot stretch. In this process, the block 9 has a damping effect on the movement of the U spring 5, thereby cooperating with the U spring 5 to have a vertical damping effect on the support block 3, thereby reducing the vertical vibration of the wiring board 6 and the control board 7 mounted on the support block 2, and reducing the continuous shaking of the wiring board 6 and the control board 7 in the vertical direction. The design cooperates with the first springs 8 to have a damping effect in multiple directions for the wiring board 6 and the control board 7 in the mounting frame 1, thereby effectively protecting the wiring board 6 and the control board 7 when the vehicle is vibrated.

[0048] In order to improve the stability of the connection between the support block 3 and the U spring 5, as shown in Figure 4 and Figure 5As shown in the drawings, in some embodiments, the U-shaped spring 5 is arranged at the bottom of the support block 3, and the abutting block 9 is arranged at the top of the support block 3, so that the support block 3 is arranged on the U-shaped spring 5 in the normal state, that is, when the whole body is subjected to vibration, thereby making the connection between the support block 3 and the U-shaped spring 5 more stable, and when the shock absorption is performed, the support block 3 is subjected to downward compression due to gravity, thereby further improving the energy absorption frequency of the U-shaped spring 5.

[0049] In order to avoid hard contact between the abutting block 9 and the support block 3, as shown in the drawings, Figure 4 and Figure 5 In some embodiments, the abutting block 9 comprises a fixedly connected abutting portion 10 and a contact portion 11, the abutting portion 10 is fixedly connected with the mounting frame 1, and the contact portion 11 is made of flexible material, specifically made of rubber. The contact portion 11 is very thin and only responsible for contacting the support block 3. When the support block 3 contacts the contact portion 11, there is no hard contact effect, so that a large noise is not generated, thereby avoiding obvious noise in the whole PCU structure during the shock absorption.

[0050] As shown in the drawings, Figure 3 and Figure 4 In some embodiments, the number of support blocks 3 arranged on the bearing plate 2 is not less than two, and the support blocks 3 are evenly distributed along the surface of the bearing plate 2, thereby uniformly providing shock absorption effect to each part of the bearing plate 2, maintaining the movement consistency of each part of the plate surface, and improving the state stability effect of the terminal block 6 and the control panel 7 on the bearing plate 2.

[0051] As shown in the drawings, Figure 3 and Figure 4 In some embodiments, the plurality of bearing plates 2 are vertically distributed, and the two opposite surfaces of any two vertically adjacent support blocks 3 are respectively connected with a sleeve 12 and a plug rod 13. Since there are only two bearing plates 2, the sleeve 12 and the plug rod 13 are arranged in a vertical distribution. The free end of the plug rod 13 is movably inserted into the sleeve 12, thereby forming a telescopic structure. The free end of the plug rod 13 and the inner wall of the sleeve 12 are connected with a second spring 14, so that the two bearing plates 2 are elastically connected. If the two bearing plates 2 move downward or upward together, the movement amplitudes of the two bearing plates 2 cannot be completely consistent. Through the elastic connection effect, the two bearing plates 2 will move close to or away from each other, so that the second spring 14 is compressed or stretched. Through the action of the second spring 14, the synchronous movement rhythm of the two bearing plates 2 can be disturbed, thereby avoiding the resonance phenomenon during the whole body shock absorption, and reducing the vibration impact on the vehicle body.

[0052] In order to keep the two bearing plates 2 from affecting each other when moving horizontally, as shown in some embodiments, the sleeve 12 and the support block 3 are connected by a universal joint, which can be a universal joint or a ball joint, and the connecting rod 13 and the support block 3 are also connected by a universal joint, which can be a universal joint or a ball joint. The ball joint is shown in the figure. Figure 4

[0053] As shown in some embodiments, the bearing plate 2 includes a mounting layer 15 and a contact layer 16, the support block 3 is fixed on the mounting layer 15, the mounting layer 15 is a hard plate body, and the wiring board 6 or the control board 7 is arranged on the contact layer 16, and the contact layer 16 is made of energy-absorbing material, so that when the bearing plate 2 is still subjected to small amplitude vibration, the transmission of vibration energy to the wiring board 6 or the control board 7 can be reduced, thereby further protecting the wiring board 6 and the control board 7. The energy-absorbing material can be silicone or foamed aluminum. Figure 4

[0054] As shown in some embodiments, the wiring board 6 or the control board 7 is installed on the contact layer 16 by a bolt assembly, the bolt assembly is composed of a plurality of bolts, the bolts penetrate the contact layer 16 and are screwed with the mounting layer 15, so that not only is it convenient to disassemble the wiring board 6 and the control board 7 on the bearing plate 2, but also the bolts can avoid the overall force between the wiring board 6 and the control board 7 and the bearing plate 2, thereby reducing energy transmission. Figure 3 Figure 4

[0055] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.​​​​

Claims

1. A PCU structure based on a lithium battery, characterized in that, include: Mounting bracket (1); A plurality of support groups located on the mounting frame (1) include a bearing plate (2) and a support block (3) fixedly disposed at the bottom of the bearing plate (2). A spring mechanism (4) is horizontally connected between the support block (3) and the mounting frame (1). The top or bottom of the support block (3) is connected to the mounting frame (1) through a U-spring (5). Wiring boards (6) and control boards (7) are respectively installed on several of the carrier plates (2); The spring mechanism (4) includes a first spring (8) that is connected to multiple sides of the support block (3), and the other end of each spring is connected to the mounting bracket (1). It also includes a stop block (9) mounted on the mounting bracket (1), which contacts the support block (3), and the stop block (9) is located on the side of the support block (3) opposite to the U spring (5); The U-spring (5) is located at the bottom of the support block (3), and the abutment (9) is located at the top of the support block (3); The abutment block (9) includes an abutment part (10) and a contact part (11) that are fixedly connected. The abutment part (10) is fixedly connected to the mounting bracket (1), and the contact part (11) is in contact with the support block (3). The contact part (11) is made of a flexible material. The number of support blocks (3) set on the bearing plate (2) is not less than two, and they are evenly distributed along the surface of the bearing plate (2); Several of the bearing plates (2) are vertically distributed. On the two opposite faces of any two vertically adjacent support blocks (3), a sleeve (12) and a rod (13) are respectively connected. The free end of the rod (13) is movably inserted into the sleeve (12). A second spring (14) is connected between the free end of the rod (13) and the inner wall of the sleeve (12). The sleeve (12) and the support block (3) and the insertion rod (13) and the support block (3) are both universally hinged.

2. The PCU structure based on a lithium battery according to claim 1, characterized in that, The bearing plate (2) includes a mounting layer (15) and a contact layer (16) that fit together. The support block (3) is fixed on the mounting layer (15). The wiring board (6) or control board (7) is disposed on the contact layer (16). The contact layer (16) is made of an energy-absorbing material.

3. The lithium battery-based PCU structure according to claim 2, characterized in that, The terminal block (6) or control board (7) is mounted on the contact layer (16) by a bolt assembly.

Images