Battery sampling slave plate mounting structure

Abstract

The utility model provides a battery sampling slave plate mounting structure, which comprises a busbar bracket which is arranged in an extending manner along the stacking direction of a plurality of stacked battery monomers so as to fix a busbar for electrically connecting two adjacent battery monomers; a sampling slave plate held on the outside of the busbar due to constrained connection with the busbar holder; an interval space is formed between the sampling slave plate and the busbar, and an elastic supporting body which is fixedly connected to the outer surface of the busbar and supports the sampling slave plate is arranged in the interval space. According to the battery sampling slave plate mounting structure, the interval space between the sampling slave plate and the busbar is reserved, so that when the sampling slave plate is matched with battery modules of different specifications for use, the sampling slave plate does not generate part interference with the battery modules, and the mounting position of the sampling slave plate relative to the battery modules can be unified; and one sampling slave plate is adaptive to the battery modules of various specifications, so that the platformization design degree of the internal structure of the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to a battery sampling slave board installation structure. Background Art

[0002] The battery BMS (Battery Management System) is the link between the battery and the user, and is mainly used for the management of secondary batteries. BMS can monitor the battery in real time. By collecting parameters such as voltage and temperature inside the battery, it can determine the battery status and control the current during the charging and discharging process accordingly to enhance the battery life. Since the performance of each battery in the battery pack may vary, the BMS needs to use balancing technology to ensure that the voltage and capacity between each battery remain consistent, which can be achieved through active balancing (such as resistor discharge balancing) or passive balancing (such as switch capacitor balancing).

[0003] For battery voltage and temperature information, BMS includes acquisition chip, FPC (Flexible Printed Circuit), wiring harness and sampling slave board. The acquisition chip is electrically connected to FPC, and can collect battery voltage and temperature information of the battery, and transmit this information to FPC. FPC is electrically connected to the sampling slave board through the wiring harness, and can transmit the battery voltage and temperature information to the acquisition slave board, which is then connected to the main control part of BMS to realize monitoring and control of the battery.

[0004] In order to optimize the internal structure of the battery pack, a common arrangement is to screw the acquisition slave board onto the battery module. In order to prevent the acquisition slave board from interfering with the parts on the battery module, different acquisition slave boards are usually required to match different battery modules, resulting in a low degree of platform design for the battery pack. Utility Model Content

[0005] In view of this, the utility model aims to provide a method to improve the platform design level of the battery pack.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] A battery sampling slave plate installation structure includes: a bus support, which is extended along the stacking direction of a plurality of stacked battery cells to fix a bus that electrically connects two adjacent battery cells; a sampling slave plate, which is retained on the outside of the bus due to a constrained connection with the bus support; a spacing space is formed between the sampling slave plate and the bus, and an elastic support body is provided in the spacing space, which is fixed to the outer surface of the bus and supports the sampling slave plate.

[0008] Furthermore, the elastic support body is configured as silicon foam bonded to the outer surface of the busbar.

[0009] Furthermore, the bottom of the silicon foam is bonded to the outer surface of the busbar by double-sided tape; the thickness of the double-sided tape is 0.3 mm to 0.5 mm.

[0010] Furthermore, the elastic support bodies are provided as two elastic support bodies spaced apart along the height direction of the busbar support, and each elastic support body is constructed as a strip extending along the extension direction of the busbar support.

[0011] Furthermore, a positioning column fixedly connected to the bus bracket is provided adjacent to the upper edge of the bus bracket, and the positioning column extends from the bus bracket toward the sampling slave plate; a positioning hole allowing the positioning column to be inserted is provided on the sampling slave plate.

[0012] Furthermore, a support rod supported at the bottom end of the sampling slave plate is fixed on the bus bracket.

[0013] Furthermore, a plurality of limiting portions abutting against the edge of the sampling slave plate are distributed on the bus support along the circumference of the sampling slave plate to maintain the position of the sampling slave plate in the height direction of the bus support.

[0014] Furthermore, at least part of the head of the limiting portion is constructed in a claw shape, and the head extends from the inner surface of the sampling slave plate to the outer surface of the sampling slave plate, and is hooked on the outer surface of the sampling slave plate to maintain the position of the sampling slave plate outside the bus bracket.

[0015] Furthermore, an FPC board electrically connected to the bus is mounted on the bus bracket below the sampling slave board, and an FPC cable is connected between the FPC board and the sampling slave board.

[0016] Furthermore, the FPC board is electrically connected to the busbar via a nickel sheet.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] The battery sampling slave plate installation structure described in the utility model uses a bus bracket to limit the sampling slave plate to the outside of the bus, and then uses an elastic support body to fix the position of the sampling slave plate, leaving a space between the sampling slave plate and the bus, so that when the sampling slave plate is used in combination with battery modules of different specifications, there is no component interference with the battery module, and the installation position of the sampling slave plate relative to the battery module can be unified, and one sampling slave plate can be adapted to battery modules of various specifications, thereby improving the platform design level of the internal structure of the battery pack.

[0019] The elastic support body is set as silicon foam and bonded to the busbar, which can facilitate the installation of the elastic support body. At the same time, silicon foam has good insulation and shock-proof buffering properties, and is relatively stable when used as an elastic support body.

[0020] Double-sided tape is used to bond the silicone foam, which can cope with some unevenness on the surface of the bus and make the silicone foam more firmly fixed.

[0021] The elastic support body is extended along the extension direction of the bus bracket, and the elastic support body can provide a better supporting effect on the collection slave board; the elastic support body is provided in two parts, the upper and lower parts, so as to provide a more stable support for the collection slave board.

[0022] A positioning column is arranged on the bus bracket, and a positioning hole is arranged on the sampling slave plate to cooperate with the positioning column, so that the connection position of the sampling slave plate and the bus bracket can be more accurate and it can also facilitate the assembly work of the assemblers.

[0023] The support rod is arranged on the bus bracket, which can support the sampling slave board in the height direction, and can also play a role in locating the installation position of the sampling slave board when the assemblers assemble the sampling slave board.

[0024] The limiting part can limit the height of the sampling plate on the bus bar.

[0025] The head of the limiting part is set to be in a claw shape, so that the limiting part can hook the sampling plate and fix the sampling plate in cooperation with the elastic support member.

[0026] The FPC board is connected to the sampling slave board by means of flat wiring, which eliminates the need for a large number of low-voltage wiring harnesses, improves integration and reduces the cost of the entire package.

[0027] The FPC is connected to the nickel sheet, and the nickel sheet is electrically connected to the bus to collect information on the voltage and temperature of the bus. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0029] Figure 1 An exploded view of the battery sampling slave plate mounting structure and the busbar according to an embodiment of the utility model;

[0030] Figure 2 for Figure 1 A partial enlarged view of the middle A part;

[0031] Figure 3 for Figure 1 A partial enlarged view of the middle B part;

[0032] Figure 4 This is a schematic diagram of the connection structure between the battery sampling slave board mounting structure and the battery module according to an embodiment of the utility model;

[0033] Figure 5 for Figure 4 A partial enlarged view of the middle C part;

[0034] Figure 6 for Figure 4 A partial enlarged view of section D in the middle.

[0035] Description of reference numerals:

[0036] 1. Bus bracket; 2. Battery cell; 3. Bus; 4. Sampling board; 5. Spacing space; 6. Elastic support body; 7. Double-sided tape; 8. FPC board; 9. FPC cable; 10. Nickel sheet;

[0037] 101, positioning column; 102, support rod; 103, limit part; 1031, head; 104, clearance hole; 105, explosion-proof hole; 106, positioning groove; 107, installation column; 108, clearance groove;

[0038] 301, mounting hole;

[0039] 401, positioning hole; 402, interface. DETAILED DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0041] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0042] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0043] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0044] The present embodiment relates to a battery sampling slave board mounting structure to optimize the internal structural arrangement of the battery pack, thereby improving the platform design level of the battery pack and reducing the cost of the entire pack.

[0045] In terms of overall structure, Figure 1-Figure 6 As shown, the battery sampling slave plate 4 installation structure of this embodiment includes a bus bracket 1, a sampling slave plate 4 and an elastic support body 6. The bus bracket 1 is extended along the superposition direction of a plurality of stacked battery cells 2 to fix the bus 3 that electrically connects two adjacent battery cells 2. The sampling slave plate 4 is maintained on the outside of the bus 3 due to the constrained connection with the bus bracket 1. A spacing space 5 is formed between the sampling slave plate 4 and the bus 3, and an elastic support body 6 is provided in the spacing space 5, which is fixed to the outer surface of the bus 3 and supports the sampling slave plate 4.

[0046] As configured above, the installation structure of the battery sampling slave plate 4 of this embodiment uses the bus bracket 1 to limit the sampling slave plate 4 to the outside of the bus 3, and then uses the elastic force of the elastic support body 6 to support the sampling slave plate 4, which not only completes the position fixation of the sampling slave plate 4, but also reserves a spacing space 5 between the sampling slave plate 4 and the bus 3. The reserved spacing space 5 prevents the sampling slave plate 4 from interfering with the components of the battery module when it is matched with battery modules of different specifications. Limiting the sampling slave plate 4 to the outside of the bus 3 can unify the installation position of the sampling slave plate 4 relative to the battery module, realizes a sampling slave plate 4 that is adapted to battery modules of various specifications, and improves the platform design degree of the internal structure of the battery pack.

[0047] Based on the above overall introduction, specifically, refer to Figure 1-Figure 3 The busbar support 1 is provided with a positioning groove 106, which is adapted to the shape of the busbar 3 so that the busbar 3 can be embedded in the positioning groove 106. A through hole is provided at the bottom of the lower groove of the positioning groove 106 for the busbar 3 to connect the electrodes of the battery cell 2. The bottom of the positioning groove 106 is also provided with a mounting column 107, and the busbar 3 is provided with a mounting hole 301. Through the cooperation of the mounting column 107 and the mounting hole 301, the busbar 3 can be more firmly mounted on the busbar support 1.

[0048] In this embodiment, the middle of the busbar 3 is bent to form a bulge, so a clearance groove 108 is also provided on the bottom hole wall of the through hole, so that the bulge of the busbar 3 can pass through the clearance groove 108 more easily during installation. A plurality of positioning grooves 106 are provided at intervals on the busbar bracket 1, so that the busbar 3 can be arranged neatly and equidistantly on the busbar bracket 1. When the busbar 3 and the battery cell 2 are specifically assembled, the busbar 3 is first installed on the busbar bracket 1, and then the busbar 3 is connected to the battery cell 2, with high installation accuracy and convenient operation.

[0049] For the positioning method between the acquisition slave board and the busbar support 1, refer to Figure 1 and Figure 5 In this embodiment, a positioning column 101 fixedly connected to the bus bracket 1 is provided near the upper edge of the bus bracket 1, and the positioning column 101 is extended from the bus bracket 1 to the sampling slave plate 4. A positioning hole 401 is provided on the sampling slave plate 4 to allow the positioning column 101 to be inserted. The combination of the positioning hole 401 and the positioning column 101 is set to two groups. When the sampling slave plate 4 is actually installed, the installation position of the sampling slave plate 4 can be ensured by aligning the two positioning columns 101 with the positioning holes 401. It should be noted that the number of groups of positioning holes 401 and positioning columns 101 can also be any value greater than two, which can play a role in positioning the sampling slave plate 4.

[0050] As a limit for the sampling slave plate 4, a support rod 102 supported at the bottom end of the sampling slave plate 4 is fixed on the bus bracket 1. The support rod 102 can support the bottom of the sampling slave plate 4, so that the sampling slave plate 4 can be installed more firmly. Specifically, when installing the sampling slave plate 4, the bottom end of the sampling slave plate 4 can be abutted against the support rod 102, and the upper end of the sampling slave plate 4 can be rotated to insert the positioning column 101 into the positioning hole 401, and the installation operation is simpler. In this embodiment, there is only one support rod 102. In order to achieve the above-mentioned function, more than one support rod 102 can also be set to support and limit the sampling slave plate 4.

[0051] To further limit the sampling from plate 4, refer to Figure 1 and Figure 6 , a plurality of limiting parts 103 are distributed on the bus support 1 along the circumference of the sampling slave plate 4, which are in contact with the edge of the sampling slave plate 4, so as to maintain the position of the sampling slave plate 4 in the height direction of the bus support 1. The limiting parts 103 can limit the sampling slave plate 4 more comprehensively, so that the sampling slave plate 4 can maintain its height position on the bus support 1.

[0052] Specifically, at least part of the head 1031 of the limiting portion 103 is constructed in a claw shape, and the head 1031 extends from the inner surface of the sampling slave plate 4 to the outer surface of the sampling slave plate 4, and is hooked on the outer surface of the sampling slave plate 4 to form a position holding of the sampling slave plate 4 outside the bus bracket 1. The head 1031 of the limiting portion 103 hooks the sampling slave plate 4, and the sampling slave plate 4 can be clamped in cooperation with the elastic support body 6, so that the sampling slave plate 4 is pressed firmly on the head 1031 of the limiting portion 103, and the position of the sampling slave plate 4 in the direction perpendicular to the bus bracket 1 is fixed. In this embodiment, the limiting portion 103 is provided in two rows, the upper row is provided with three, and the lower row is provided with four, so as to limit the sampling slave plate 4 from two directions. Two positioning columns 101 are staggered between the limiting portions 103 in the upper row, and the support rod 102 is provided between the two limiting portions 103 in the middle of the lower row.

[0053] It should be noted that the part where the sampling slave plate 4 contacts the head 1031 of the limiting part 103 cannot be provided with circuits or electrical components to prevent the sampling slave plate 4 from being damaged when the head 1031 of the limiting part 103 hooks the sampling slave plate 4. Specifically, a blank area without circuits and electrical components can be provided at the bottom of the sampling slave plate 4, and the height of the blank area is 2mm to 3mm. Because the thickness and spacing of the battery cells 2 in battery modules of different specifications may be different, this causes the position of the limiting part 103 on the bus bracket 1 to change. The blank area can prevent the head 1031 of the limiting part 103 from contacting the circuit or electrical components on the sampling slave plate 4 regardless of any position of the bottom of the sampling slave plate 4. As for the size selection of the blank area, if the height of the blank area is less than 2mm, the contact area between the head 1031 of the limiting part 103 and the sampling slave plate 4 may be too small, and the hook may not be firm; if the height of the blank area is higher than 3mm, the sampling slave plate 4 will be wasted.

[0054] Reference Figure 1 and Figure 3 Two interfaces 402 are welded on the outer surface of the sampling slave board 4. The two interfaces 402 are located at both ends of the sampling slave board 4 and are used for input and output signals respectively. They are used to electrically connect the sampling slave board 4 with the BMS main control to realize the control of the sampling slave board 4 by the BMS main control.

[0055] As a preferred material for the elastic support body 6, the elastic support body 6 is configured to be silicon foam bonded to the outer surface of the bus 3. Silicon foam has good insulation properties and can effectively isolate the collection slave board and the bus 3. Silicon foam also has excellent shockproof and buffering properties. Because the battery pack is located in different environments, vibrations may occur. Silicon foam can absorb the vibration of the collection slave board, making the collection slave board less likely to be damaged by vibration. Of course, it is also possible to set the elastic support body 6 to other materials with insulation and elasticity, such as polyurethane foam, rubber foam, sponge rubber, etc.

[0056] For the specific bonding structure of silicone foam, refer to Figure 1 and Figure 6 In this embodiment, the bottom of the silicon foam is bonded to the outer surface of the bus 3 by a double-sided adhesive tape 7. The thickness of the double-sided adhesive tape 7 is 0.3 mm to 0.5 mm. The double-sided adhesive tape 7 is provided to bond the silicon foam, so as to cope with some unevenness on the surface of the bus 3 and make the fixation of the silicon foam more firm. If the thickness of the double-sided adhesive tape 7 is less than 0.3 mm, the covering and filling effect of the unevenness on the surface of the bus 3 will be poor; if the thickness of the double-sided adhesive tape 7 is greater than 0.5 mm, its shear resistance is weak, and in actual use, it is easy to deform and cause the silicon foam to be misplaced.

[0057] In order to achieve a better use effect of the elastic support body 6, two elastic support bodies 6 are arranged at intervals along the height direction of the bus support 1, and each elastic support body 6 is constructed as a strip extending along the extension direction of the bus support 1. The elastic support body 6 extending along the bus support 1 can support the sampling slave board 4 more stably. The provision of an elastic support body 6 at the upper and lower parts of the sampling slave board 4 can fully support the sampling slave board 4 and more effectively absorb the vibration of the sampling slave board 4.

[0058] The common connection between the FPC board 8 and the sampling slave board 4 is a wire harness connection, which requires a large number of low-voltage wire harnesses, has a relatively low integration level, and increases the overall cost of the battery pack. In order to solve the above problems, the structure of the information collection part corresponding to the sampling slave board 4 is optimized in this embodiment. Figure 1 and Figure 4 , an FPC board 8 electrically connected to the busbar 3 is mounted on the busbar bracket 1 below the sampling slave board 4, and an FPC cable 9 is connected between the FPC board 8 and the sampling slave board 4. The FPC board 8 can directly connect the circuit between the two by welding the FPC cable 9 with the sampling slave board 4. As for the number of FPC cables 9, it is adapted to the number of battery module strings. In this embodiment, four FPC cables 9 are provided. Compared with the common wiring harness connection method, the sampling slave board 4 is connected by the FPC cable 9, which has a higher degree of integration and reduces the manufacturing cost of the battery pack.

[0059] Exemplarily, the FPC board 8 is electrically connected to the bus 3 through the nickel sheet 10 to collect the voltage of the bus 3. The nickel sheet 10 is used as a collection sheet, has good chemical stability and conductivity, and has strong shape adaptability, which is easy to shape. In this embodiment, the nickel sheet 10 is directly welded to the FPC board 8, and there is no need to set a wire to connect the two. There are two types of nickel sheets 10, one is a flat sheet and the other is a "Z" shaped bend. The flat sheet nickel sheet 10 is directly welded to the bus 3 to collect the voltage of the bus 3. The "Z" shaped bent nickel sheet 10 is welded to the shell of the battery cell 2 to collect the voltage of the shell of the battery cell 2. For the "Z" shaped bent nickel sheet 10, a plurality of clearance holes 104 are arranged at intervals on the bus bracket 1, and the "Z" shaped bent nickel sheet 10 is connected to the shell of the battery cell 2 through the clearance holes 104. An explosion-proof hole 105 is also provided on the busbar support 1 below the clearance hole 104. The explosion-proof hole 105 is an oblong hole, serving as a pressure relief channel for the battery, and is adapted to the shape of the explosion-proof valve. The projections of the explosion-proof hole 105 and the clearance hole 104 in the vertical direction are staggered.

[0060] When assembling the battery, the bus bracket 1, bus 3, FPC board 8, FPC cable 9, nickel sheet 10, and sampling board 4 are integrated together to form the bus bracket 1 assembly, which is assembled with the battery cell 2 in the integrated state to improve the assembly efficiency.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery sampling slave board mounting structure, characterized in that: include: A busbar support is arranged to extend along the stacking direction of the plurality of stacked battery cells to fix the busbar that electrically connects two adjacent battery cells; The sampling slave plate is held outside the bus due to the constrained connection with the bus bracket; a spacing space is formed between the sampling slave plate and the bus, and an elastic support body fixedly connected to the outer surface of the bus and supporting the sampling slave plate is arranged in the spacing space.

2. The battery sampling slave board mounting structure according to claim 1, characterized in that: The elastic support body is configured as silicon foam bonded to the outer surface of the busbar.

3. The battery sampling slave plate mounting structure according to claim 2, characterized in that: The bottom of the silicon foam is bonded to the outer surface of the busbar by double-sided adhesive; the thickness of the double-sided adhesive is 0.3 mm to 0.5 mm.

4. The battery sampling slave plate mounting structure according to claim 1, characterized in that: The elastic support bodies are provided as two elastic support bodies spaced apart along the height direction of the busbar support, and each elastic support body is configured as a strip extending along the extension direction of the busbar support.

5. The battery sampling slave plate mounting structure according to claim 1, characterized in that: A positioning column fixedly connected to the bus bracket is provided adjacent to the upper edge of the bus bracket, and the positioning column extends from the bus bracket to the sampling slave plate; a positioning hole allowing the positioning column to be inserted is provided on the sampling slave plate.

6. The battery sampling slave plate mounting structure according to claim 5, characterized in that: A support rod supported at the bottom end of the sampling slave plate is fixed on the busbar bracket.

7. The battery sampling slave plate mounting structure according to claim 1, characterized in that: A plurality of stoppers abutting against the edge of the sampling slave plate are distributed on the bus support along the circumference of the sampling slave plate to maintain the position of the sampling slave plate in the height direction of the bus support.

8. The battery sampling slave plate mounting structure according to claim 7, characterized in that: At least part of the head of the limiting portion is constructed in a claw shape, and the head extends from the inner surface of the sampling slave plate to the outer surface of the sampling slave plate, and is hooked on the outer surface of the sampling slave plate to maintain the position of the sampling slave plate outside the bus bracket.

9. The battery sampling slave plate mounting structure according to any one of claims 1 to 8, characterized in that: An FPC board electrically connected to the busbar is mounted on the busbar bracket below the sampling slave board, and an FPC cable is connected between the FPC board and the sampling slave board.

10. The battery sampling slave plate mounting structure according to claim 9, characterized in that: The FPC board is electrically connected to the busbar via a nickel sheet.

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