Battery power distribution management integrated device, power battery and vehicle

Abstract

The utility model relates to the technical field of vehicles, in particular to a battery power distribution management integrated device, a power battery and a vehicle, and the battery power distribution management integrated device comprises a battery power distribution unit which comprises a relay, and the upper end of the relay is provided with a sampling terminal and a control terminal; and the battery management unit comprises a control circuit board, the control circuit board is connected above the battery power distribution unit, the control circuit board comprises an electric connection sheet and a sampling terminal, and the control terminal is attached to and electrically connected with the corresponding electric connection sheet. The battery power distribution unit and the battery management unit are integrated, the electric connection sheet is directly attached to the sampling terminal and the control terminal, traditional wire harness connection is replaced, the integration degree is improved, redundant space for separately arranging the traditional battery power distribution unit and the battery management unit is saved, the number of parts of the power battery is reduced, and the power battery is more compact. Contact resistance and loosening risks are reduced, the reliability of electric connection is improved, a conductive path is shorter, and the sampling precision is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a battery power distribution management integrated device, a power battery and a vehicle. BACKGROUND

[0002] The power battery is a core component of an electric vehicle, wherein a BDU (Battery Distribution Unit) and a BMU (Battery Management Unit) are important components in the power battery, the function of the BDU is to be responsible for power distribution of the power battery, and the function of the BMU is to detect battery status, battery balance, estimate battery status, safety management and the like.

[0003] In the related art power battery, the BDU and the BMU are arranged separately, the BDU includes a low-voltage control wire harness and a high-voltage sampling wire harness, the BMU includes a control circuit board, and the connection terminals of the low-voltage control wire harness, the high-voltage sampling wire harness and the control circuit board are electrically connected. The related art power battery has low integration and low energy density, the existence of the wire harness leads to inconvenience in production of the power battery, affects production efficiency, and the stability of the wire harness connection is poor. UTILITY MODEL CONTENT

[0004] The purpose of the present application is to provide a battery power distribution management integrated device, a power battery and a vehicle, to improve the integration of the power battery, improve the energy density of the power battery, and improve the performance of the power battery.

[0005] To solve the above technical problems, the present application provides a battery power distribution management integrated device, comprising:

[0006] A battery power distribution unit, the battery power distribution unit includes a relay, the upper end of the relay has a sampling terminal and a control terminal;

[0007] A battery management unit, the battery management unit includes a control circuit board, the control circuit board is connected above the battery power distribution unit, the control circuit board includes an electrically conductive sheet, the sampling terminal, the control terminal and the corresponding electrically conductive sheet are attached and electrically connected.

[0008] The battery power distribution management integrated device integrates the battery power distribution unit and the battery management unit, the battery power distribution unit and the battery management unit are arranged in a stacking manner along the up-down direction, the electric connection sheet is directly attached to the sampling terminal and the control terminal, replacing the traditional low-voltage control wire harness and high-voltage sampling wire harness, improving the integration of the battery power distribution unit and the battery management unit, saving the redundant space of the traditional separate arrangement of the battery power distribution unit and the battery management unit, significantly reducing the overall volume, making the internal layout of the power battery more compact, releasing more space for the battery cell or other key components, indirectly improving the energy density of the power battery; by replacing the low-voltage control wire harness and the high-voltage sampling wire harness, the number of components of the power battery can also be reduced, the production cost can be reduced, and the production convenience of the power battery can be improved; the electric connection sheet is directly attached to the sampling terminal and the control terminal, compared with the traditional wire harness connection, the contact resistance and the risk of loosening can also be reduced, the reliability of the electric connection can be improved, and the sampling accuracy can be improved.

[0009] Therefore, the battery power distribution management integrated device of the embodiment improves the space utilization, production efficiency, system reliability and energy density, and makes the power battery with the battery power distribution management integrated device more competitive in the market.

[0010] Optionally, the electric connection sheet is a nickel sheet.

[0011] Optionally, the control circuit board comprises a circuit board body, the circuit board body comprises a connecting hole, and the electric connection sheet is fixed inside the connecting hole.

[0012] Optionally, the battery power distribution unit comprises a bottom shell, an upper end of the bottom shell is an open end, the relay is arranged inside the bottom shell, and the control circuit board is connected with the bottom shell.

[0013] Optionally, the battery power distribution unit further comprises:

[0014] a pre-charging relay and a pre-charging resistor, the pre-charging relay and the pre-charging resistor each comprise a connecting terminal, the connecting terminal passes through the control circuit board and is electrically connected with the control circuit board.

[0015] The application also provides a power battery comprising:

[0016] the battery power distribution management integrated device described above;

[0017] a shell, and the battery power distribution management integrated device is arranged inside the shell.

[0018] The power battery of the application comprises the battery power distribution management integrated device described above, and therefore has the same technical effects as the battery power distribution management integrated device described above, which will not be described here again.

[0019] Optionally, the control circuit board comprises a first grounding terminal, the battery power distribution unit comprises a second grounding terminal, the shell comprises a third grounding terminal, and the power battery further comprises:

[0020] a grounding copper bar, which is electrically connected with the first grounding terminal, the second grounding terminal and the third grounding terminal.

[0021] The application also provides a vehicle comprising the power battery.

[0022] The vehicle comprises the power battery, and thus has the same technical effects as the power battery, which will not be described herein. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A structural schematic view of a specific embodiment of the battery power distribution management integrated device provided by the application is shown in the figure;

[0024] Figure 2 A top view of the battery power distribution management integrated device is shown in the figure; Figure 1

[0025] Figure 3 A split view of the battery power distribution management integrated device and the control circuit board is shown in the figure; Figure 1

[0026] Figure 4 An enlarged view of the A area is shown in the figure; Figure 1

[0027] Figure 5 A structural schematic view of the pre-charging relay in the battery power distribution management integrated device is shown in the figure; Figure 1

[0028] Figure 6 A structural schematic view of the control circuit board in the battery power distribution management integrated device is shown in the figure; Figure 5

[0029] Figure 7 A structural schematic view of the pre-charging relay in the battery power distribution management integrated device is shown in the figure; Figure 1 In the figure,

[0030] In the figure, Figures 1-7 1-battery power distribution unit; 11-relay; 111-sampling terminal; 112-control terminal; 12-bottom shell; 13-pre-charging relay; 14-pre-charging resistor; a-connection terminal;

[0031] 1-battery power distribution unit; 11-relay; 111-sampling terminal; 112-control terminal; 12-bottom shell; 13-pre-charging relay; 14-pre-charging resistor; a-connection terminal;

[0032] 2-control circuit board; 21-electrically connecting sheet; 22-circuit board body; 22a-connection hole;

[0033] 3-grounding copper bar.​​​​​ DETAILED DESCRIPTION

[0034] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0035] Herein, the perspective view is taken as an example, Figure 3 Figure 3 The direction indicated by the arrow in the figure is the up-down direction.

[0036] Please refer to Figures 1-4 , Figure 1 is a structural schematic view of a specific embodiment of the battery power distribution management integrated device provided by the present application; Figure 2 is Figure 1 a top view of the battery power distribution management integrated device; Figure 3 is Figure 1 a split view of the battery power distribution management integrated device and the control circuit board; Figure 4 is Figure 1 a structural schematic view of the relay in the battery power distribution management integrated device.

[0037] The present embodiment provides a battery power distribution management integrated device, comprising:

[0038] The battery power distribution unit 1 comprises a relay 11, and the upper end of the relay 11 has a sampling terminal 111 and a control terminal 112;

[0039] The battery management unit comprises a control circuit board 2, which is connected above the battery power distribution unit 1, and the control circuit board 2 comprises an electrically conductive sheet 21, the sampling terminal 111, the control terminal 112 and the corresponding electrically conductive sheet 21 are attached and electrically connected.

[0040] The battery power distribution management integrated device of the present embodiment integrates the battery power distribution unit 1 and the battery management unit, and the battery power distribution unit 1 and the battery management unit are arranged in a stacked manner along the up-down direction, the electrically conductive sheet 21 is directly attached and connected with the sampling terminal 111 and the control terminal 112, replacing the traditional low-voltage control wire harness and high-voltage sampling wire harness, improving the integration of the battery power distribution unit 1 and the battery management unit, saving the redundant space of the traditional separate arrangement of the battery power distribution unit 1 and the battery management unit, significantly reducing the overall volume, making the internal layout of the power battery more compact, releasing more space for the battery cell or other key components, indirectly improving the energy density of the power battery; by replacing the low-voltage control wire harness and the high-voltage sampling wire harness, the number of components of the power battery can also be reduced, the production cost can be reduced, and the production convenience of the power battery can be improved; the electrically conductive sheet 21 is directly attached with the sampling terminal 111 and the control terminal 112, compared with the traditional wire harness connection, the contact resistance and the risk of loosening can also be reduced, the reliability of the electrical connection can be improved, and the conductive path is shorter, the sampling accuracy is improved.​

[0041] Therefore, the embodiment improves the space utilization, production efficiency, system reliability and energy density by the innovation of structure integration and connection mode, and is more suitable for the development trend of high integration and low cost of power battery, so that the power battery with the battery power distribution management integrated device has more market competitiveness.

[0042] In some embodiments of the present application, the sampling terminal 111 and the control terminal 112 are fixed by laser welding and the corresponding electric connecting sheet 21.

[0043] Laser welding is more suitable for welding and fixing of high-precision structures. By using the above laser welding process, the connection reliability of the sampling terminal 111, the control terminal 112 and the electric connecting sheet 21 can be significantly improved, and poor contact caused by mechanical looseness can be avoided.

[0044] In some embodiments of the present application, the electric connecting sheet 21 is a nickel sheet.

[0045] As described above, the electric connecting sheet 21 is a nickel sheet. First, the nickel sheet has good electrical conductivity, and the contact resistance after welding with the terminal is stable at a very low level, which is conducive to reducing energy loss. Second, the nickel sheet is more suitable for laser welding process. The nickel sheet can be quickly melted and uniformly combined with the sampling terminal 111 or the control terminal 112 during welding, thereby improving the connection reliability. Third, the nickel sheet has good structural rigidity, which can avoid deformation or fracture caused by vibration as much as possible. Finally, the nickel sheet can be directly stamped into shape, and the processing efficiency is high.

[0046] Of course, the electric connecting sheet 21 is not limited to the form of the nickel sheet described above. In some other embodiments of the present application, the electric connecting sheet 21 can also be a copper sheet, an iron sheet, etc. When the electric connecting sheet 21 is a copper sheet, the copper sheet has super-high electrical conductivity, which can greatly reduce the contact resistance of the connecting point and reduce the energy loss in current transmission. The high electrical conductivity of the copper sheet can also ensure that the current is evenly distributed on the electric connecting sheet 21, avoiding local overheating and improving the current stability between the relay 11 and the control circuit board 2. When the electric connecting sheet 21 is an iron sheet, the structural strength of the electric connecting sheet 21 can be significantly improved, and the manufacturing cost of the electric connecting sheet 21 can be significantly reduced.

[0047] Please refer to Figures 5-6 , Figure 5 for Figure 1 a structural schematic view of the control circuit board in the battery power distribution management integrated device; Figure 6 for Figure 5 an enlarged view of the A area in

[0048] In the embodiment, the control circuit board 2 includes a circuit board body 22, and the circuit board body 22 includes a connecting hole 22a, and the electric connecting sheet 21 is fixed inside the connecting hole 22a.

[0049] As set forth above, the electric connecting piece 21 is fixed inside the connecting hole 22a. Firstly, compared with the surface mounting process, embedding the electric connecting piece 21 inside the connecting hole 22a can save more space and optimize the layout of the control circuit board 2; secondly, fixing the electric connecting piece 21 inside the connecting hole 22a can provide better mechanical support for the electric connecting piece 21, and prevent the electric connecting piece 21 from loosening due to vibration or external force as much as possible, thereby improving the electrical connection reliability of the electric connecting piece 21 and the circuit board body 22; in addition, the setting of the connecting hole 22a makes it easier to position and fix the electric connecting piece 21 during assembly, thereby improving production efficiency.

[0050] In some embodiments, the electric connecting piece 21 is fixed inside the connecting hole 22a by wave soldering. Wave soldering is an efficient soldering method that is more suitable for through-hole mounting technology. The circuit board body 22 and the electric connecting piece 21 are fixed by wave soldering, which can provide strong soldering strength and ensure that the connection between the electric connecting piece 21 and the circuit board body 22 is firm and reliable.

[0051] Please continue to refer to Figures 1-4 In the present embodiment, the battery power distribution unit 1 comprises a bottom shell 12, the upper end of the bottom shell 12 is an open end, the relay 11 is arranged inside the bottom shell 12, and the control circuit board 2 is connected with the bottom shell 12.

[0052] As set forth above, firstly, by arranging the relay 11 inside the bottom shell 12 and connecting the control circuit board 2 with the bottom shell 12, the structure of the entire battery power distribution management integrated device is more compact, which helps to reduce the overall volume of the power battery; secondly, the connection of the control circuit board 2 with the bottom shell 12 helps to stabilize the electrical connection between the electric connecting piece 21 and the sampling terminal 111 and the control terminal 112, and reduce the connection failure caused by vibration; thirdly, the relay 11 is arranged inside the bottom shell 12, and the bottom shell 12 can provide physical protection for the relay 11 to prevent external environment such as dust and moisture from damaging the relay 11, thereby improving the service life and reliability of the relay 11; finally, the open end of the bottom shell 12 helps to enhance the heat dissipation performance of the relay 11, and prevent the temperature rise from affecting the normal work and service life of the relay 11.

[0053] In some embodiments of the present application, the control circuit board 2 and the bottom shell 12 are connected and fixed by bolts.

[0054] In some other embodiments of the present application, the control circuit board 2 and the bottom shell 12 are connected by hot riveting.

[0055] The hot riveting connection is a method of combining two or more components together through heat and pressure, which is more firm than traditional bolt connection or adhesive fixing, can bear larger mechanical stress and vibration, and further improves the connection strength of the control circuit board 2 and the bottom shell 12. Meanwhile, compared with the bolt fixing, the hot riveting connection can more evenly distribute the stress, reduce the stress concentration, and as far as possible reduce the risk of damage of the control circuit board 2 or the bottom shell 12 due to excessive stress. In addition, the hot riveting connection can also save the connecting components such as bolts, reduce the number of parts, and reduce the assembly complexity.

[0056] The hot riveting points can be arranged according to the mass distribution of the control circuit board 2.

[0057] According to the mass distribution of the control circuit board 2, the hot riveting points can be arranged to ensure that the stress distribution on the control circuit board 2 is more uniform, and the deformation or damage of the control circuit board 2 caused by stress concentration is reduced. Meanwhile, the part with larger mass usually needs stronger fixing. By arranging more hot riveting points in the area with larger mass, the connection between the area with larger mass and the bottom shell 12 can be more reliable, the stability and rigidity of the entire control circuit board 2 are improved, and the vibration of the control circuit board 2 in the use process is reduced.

[0058] Please continue to refer to Figure 5 In the embodiment, the battery power distribution unit 1 further comprises:

[0059] The pre-charging relay 13 and the pre-charging resistor 14 each include a connecting terminal a, the connecting terminal a passes through the control circuit board 2 and is electrically connected with the control circuit board 2.

[0060] In the related art power battery, the battery power distribution unit includes a pre-charging wire harness, the pre-charging relay and the pre-charging resistor are connected with the control circuit board through the pre-charging wire harness, the integration degree is low, the existence of the pre-charging wire harness leads to inconvenient production of the power battery, affects the production efficiency, and the stability of the wire harness connection is poor. In the embodiment, the pre-charging relay 13 and the pre-charging resistor 14 each include a connecting terminal a, the connecting terminal a passes through the control circuit board 2 and is electrically connected with the control circuit board 2, that is, the pre-charging relay 13 and the pre-charging resistor 14 are directly integrated on the control circuit board 2 in the embodiment, which improves the integration degree of the battery power distribution management integrated device in the embodiment. Since the pre-charging wire harness is reduced, it is beneficial to reduce the assembly complexity of the battery power distribution management integrated device, the production process is simplified, and the production efficiency is effectively improved. The connecting terminal a is directly electrically connected with the control circuit board 2, compared with the traditional wire harness connection, this direct connection mode can provide better mechanical stability and electrical connection stability, and reduce the problem of poor contact caused by vibration.

[0061] In the embodiment, the connecting terminal a and the control circuit board 2 are fixed by wave soldering.

[0062] The wave-soldering is a high-efficiency welding method, which is more suitable for the through-hole plug-in technology. The connecting terminal a and the control circuit board 2 are fixed by the wave-soldering, which can provide strong welding strength and ensure the firm and reliable connection between the connecting terminal a and the control circuit board 2.

[0063] The embodiment also provides a forming method of the battery power distribution management integrated device, which comprises the following steps:

[0064] In step S1, the battery power distribution unit 1 and the battery management unit are produced. The battery management unit comprises the control circuit board 2, and the control circuit board 2 comprises the electric connecting piece 21. The battery power distribution unit 1 comprises the relay 11, and the relay 11 comprises the sampling terminal 111 and the control terminal 112.

[0065] In step S2, the control circuit board 2 is arranged above the battery power distribution unit 1.

[0066] In step S3, the sampling terminal 111, the control terminal 112 and the corresponding electric connecting piece 21 are attached and electrically connected.

[0067] The forming method of the battery power distribution management integrated device arranges the battery power distribution unit 1 and the battery management unit in a stacking manner along the up-down direction, directly attaches and connects the electric connecting piece 21 with the sampling terminal 111 and the control terminal 112, replaces the traditional low-voltage control wire harness and high-voltage sampling wire harness, improves the integration of the battery power distribution unit 1 and the battery management unit, saves the redundant space for separately arranging the battery power distribution unit 1 and the battery management unit, significantly reduces the overall volume, makes the internal layout of the power battery more compact, releases more space for the battery cell or other key components, and indirectly improves the energy density of the power battery. By replacing the low-voltage control wire harness and the high-voltage sampling wire harness, the number of components of the power battery can be reduced, the production cost can be reduced, and the production convenience of the power battery can be improved. The electric connecting piece 21 is directly attached with the sampling terminal 111 and the control terminal 112, which can reduce the contact impedance and the risk of loosening compared with the traditional wire harness connection, improve the reliability of the electric connection, shorten the conductive path, and improve the sampling accuracy.

[0068] Further, the battery power distribution unit 1 further comprises the bottom shell 12. The forming method of the battery power distribution management integrated device further comprises the following step between step S2 and step S3:

[0069] In step S20, the control circuit board 2 and the bottom shell 12 are connected.

[0070] As set above, the control circuit board 2 is connected with the bottom shell 12 first, so that the control circuit board 2 can be ensured to be in the preset assembly position, at this time, the sampling terminal 111, the control terminal 112 and the corresponding electrically connecting sheet 21 are attached, so as to facilitate the subsequent electrically connecting operation of the sampling terminal 111, the control terminal 112 and the corresponding electrically connecting sheet 21, and improve the connecting precision of the sampling terminal 111, the control terminal 112 and the corresponding electrically connecting sheet 21.

[0071] The embodiment also provides a power battery, comprising:

[0072] The battery power distribution management integrated device as described above;

[0073] The shell, the battery power distribution management integrated device is arranged in the interior of the shell.

[0074] The power battery of the embodiment comprises the battery power distribution management integrated device as described above, and thus has the same technical effects as the battery power distribution management integrated device as described above, which will not be repeated here.

[0075] Further, the control circuit board 2 comprises a first grounding terminal, the battery power distribution unit 1 comprises a second grounding terminal, the shell comprises a third grounding terminal, and the power battery further comprises:

[0076] The grounding copper bar 3 is electrically connected with the first grounding terminal, the second grounding terminal and the third grounding terminal.

[0077] As set above, the first grounding terminal, the second grounding terminal and the third grounding terminal are connected uniformly through the grounding copper bar 3, so that the grounding consistency of the entire power battery can be ensured, and the electrical safety of the power battery is improved; at the same time, the control circuit board 2 is directly grounded, and the anti-interference effect of the near-end grounding is better.

[0078] The embodiment also provides a vehicle comprising the power battery as described above.

[0079] The vehicle of the embodiment comprises the power battery as described above, and thus has the same technical effects as the power battery as described above, which will not be repeated here.

[0080] The above is only the preferred embodiment of the present application, and it should be noted that, for those skilled in the art, without departing from the principle of the present application, a number of improvements and refinements can be made, which should also be regarded as the protection scope of the present application.

Claims

1. A battery power distribution management integrated device, characterized by, The application relates to a battery power distribution management integrated device. The battery power distribution unit (1) comprises a relay (11), the upper end of the relay (11) is provided with a sampling terminal (111) and a control terminal (112); a battery management unit comprises a control circuit board (2) connected above the battery power distribution unit (1), the control circuit board (2) comprises an electric connection sheet (21), the sampling terminal (111), the control terminal (112) and the corresponding electric connection sheet (21) are attached and electrically connected. The electric connection sheet (21) is a nickel sheet.

2. The battery power distribution management integrated device of claim 1, wherein, The control circuit board (2) comprises a circuit board body (22) comprising a connecting hole (22a), the electric connection sheet (21) is fixed inside the connecting hole (22a).

3. The battery power distribution management integrated device according to claim 1 or 2, characterized by, The battery power distribution unit (1) comprises a bottom shell (12), the upper end of the bottom shell (12) is an open end, the relay (11) is arranged inside the bottom shell (12), and the control circuit board (2) is connected with the bottom shell (12).

4. The battery power distribution management integrated device according to claim 1 or 2, characterized by, The battery power distribution unit (1) further comprises:

5. The battery power distribution management integrated device according to claim 1 or 2, characterized by, A pre-charging relay (13) and a pre-charging resistor (14), the pre-charging relay (13) and the pre-charging resistor (14) both comprise a connecting terminal (a), the connecting terminal (a) penetrates through the control circuit board (2) and is electrically connected with the control circuit board (2). The application relates to a battery power distribution management integrated device.

6. A power cell, characterized by The application relates to a battery power distribution management integrated device. The control circuit board (2) comprises a first grounding terminal, the battery power distribution unit (1) comprises a second grounding terminal, the shell comprises a third grounding terminal, and the power battery further comprises: A grounding copper bar (3) which is electrically connected with the first grounding terminal, the second grounding terminal and the third grounding terminal.

7. The power cell of claim 6, wherein, The application relates to a power battery. The application relates to a power battery.

8. A vehicle characterized by comprising: ​

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