Battery pack structure assembly

Abstract

The invention provides a battery pack structure assembly which comprises a plurality of battery cell columns, and every two battery cell columns are conductively connected through a first conducting bar; the two end plates are oppositely arranged along a first path, each end plate comprises an inter-column plate piece and an inter-column end plate piece arranged at one end of the inter-column plate piece, the inter-column plate piece is arranged between two adjacent battery cell columns, the free end of the inter-column plate piece is provided with a connector, the connectors in the two end plates are connected with each other, and the connectors in the two end plates are connected with each other on the first path. A degree of freedom for moving along a second path is formed between the two connectors; and the battery cell column is fixed between the column end plates in the two end plates. According to the invention, a multi-string and multi-column battery cell arrangement form is formed in the same battery pack structure assembly, metal plate fixation and conductive connection between different columns are not needed on site, the operation process is simplified, the operation difficulty is reduced, and the problem of unreliable fixation effect caused by field metal plate fixation is avoided; the excessive extrusion effect between the end plate and the battery cell is avoided, and the normal working performance of the battery cell is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of batteries, and in particular relates to a battery pack structure assembly. Background Art

[0002] A battery pack is an energy storage device composed of multiple cells. According to different shapes, the cells are mainly divided into cylindrical, square and soft-pack cells. They are widely used in various fields, such as new energy vehicles, energy storage systems, consumer electronics and industrial applications. For new energy vehicles, the energy density, safety and reliability of the battery pack directly affect the vehicle's range and service life. The battery pack in the energy storage system can be used for emergency power supply, photovoltaic power generation and energy storage. Consumer electronic products such as mobile phones and laptops also use battery packs in large quantities. In the industrial field, battery packs can also be used in industrial robots, drones and other equipment.

[0003] The main components of a battery pack include a battery module and a shell. The battery module is the core of the battery pack, which consists of multiple battery cells encapsulated in a shell. The shell protects the internal battery cells from physical damage from the outside. Most battery packs used in energy storage systems are designed in a string. During installation, the battery packs need to be placed one by one, and then sheet metal parts are made on-site according to installation requirements to achieve fixation and conductive connection between each battery pack. This operation method greatly increases the workload of on-site staff, and it is also easy to cause unstable fixation of the battery pack, and even affect the reliability of power connection between battery packs. Summary of the invention

[0004] An embodiment of the present invention provides a battery pack structure assembly, which aims to solve the problem that the battery pack of an energy storage system is unstable during installation and the reliability of power connection cannot be effectively guaranteed.

[0005] To achieve the above object, the technical solution adopted by the present invention is: A battery pack structure assembly is provided, comprising: A plurality of battery cell rows, wherein the plurality of battery cell rows are distributed along a first path, each of the battery cell rows comprises a plurality of battery cells distributed along a second path, the second path is perpendicular to the first path, and a main expansion direction of the battery cell row is parallel to the second path, and every two battery cell rows are conductively connected via a first conductive bar; Two end plates are arranged opposite to each other along the first path, each end plate includes an inter-column plate and a column end plate arranged at one end of the inter-column plate, the inter-column plate is placed between two adjacent battery cell columns, a connector is provided at the free end of the inter-column plate, the connectors in the two end plates are connected to each other, and on the first path, the two connectors have the freedom to move along the second path; the battery cell columns are fixed between the column end plates in the two end plates.

[0006] In a possible implementation, a battery management module is installed on the column end plate in one of the end plates, and the lead-out terminals of the battery cell column are arranged adjacent to the column end plate in another of the end plates.

[0007] In a possible implementation, the inter-row plate and the row end plate both have a plate cavity extending along a third path, and the third path is perpendicular to the first path and the second path; a plurality of partitions are provided in the plate cavity, and the plurality of partitions divide the plate cavity into a plurality of plate channels extending along the third path.

[0008] In some embodiments, a lifting hole is formed on a side of the column end plate facing away from the battery cell column.

[0009] In one possible implementation, the connecting head is a hook-shaped component, the connecting heads in the two end plates are hooked to each other on the second path and have the freedom to move along the second path, and the battery pack structure assembly also includes a fixing belt, which is arranged around the periphery of the end plate and the battery cell array.

[0010] In a possible implementation, an insulating heating plate is provided between two adjacent battery cells, and the two adjacent battery cells are conductively connected via a second conductive bar.

[0011] In some embodiments, a second buffer protrusion is formed at a middle portion of the second conductive row and is arched in a direction away from the battery core, and the second buffer protrusion can be elastically deformed along a second path.

[0012] In a possible implementation, an elastic buffer layer is provided between the column end plate and the battery cell located at the end.

[0013] In some embodiments, the battery pack structure assembly also includes an insulating bracket, which is covered on the power connection side of the battery cell array, and is provided with a first operating groove corresponding to the first conductive row, a second operating groove corresponding to the second conductive row, a avoidance hole corresponding to the connection terminal of the insulating heating plate, and an exhaust hole corresponding to the exhaust valve of the battery cell.

[0014] In some embodiments, a side of the insulating support facing away from the battery core is covered with an insulating cushion layer.

[0015] Compared with the prior art, the solution shown in the embodiment of the present application forms a storage space for accommodating and fixing the battery cell columns between the column end plates and the inter-column plates of the two end plates through two oppositely arranged end plates, and the two sides of the inter-column plates form storage spaces respectively, and each battery cell column is placed in a different storage space and fixed in the storage space, so that the multiple battery cell columns are formed into a whole, and then the connection between the different battery cell columns is formed through the first conductive row, so that the battery cell arrangement form of multiple strings and multiple columns is formed in the same battery pack structure assembly, and there is no need to perform sheet metal fixing and conductive connection between different columns on site , effectively simplifying the operation process and reducing the difficulty of operation; at the same time, the integrated design also ensures the stability of the fixation of the battery cell array between the end plates, avoiding the problem of unreliable fixing effect caused by on-site sheet metal fixation, and effectively improving the reliability of the conductive connection between the battery cell arrays; and, because the end plates are connected by connectors, and the two connectors have the freedom to move along the second path, when the battery cell expands, the two end plates can move along the second path to a certain extent, avoiding the problem of excessive extrusion force between the end plates and the battery cell, thereby ensuring the normal working performance of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional view of the battery pack structure assembly provided by an embodiment of the present invention Figure 1 ; Figure 2 A three-dimensional view of the battery pack structure assembly provided by an embodiment of the present invention Figure 2 , where the insulating pad is not shown; Figure 3 for Figure 2 A top view of the battery pack structure assembly; Figure 4 A three-dimensional view of the battery pack structure assembly provided by an embodiment of the present invention Figure 3 , wherein the insulating pad and the insulating support are not shown; Figure 5 for Figure 4 A top view of the battery pack structure assembly; Figure 6 for Figure 5 A magnified view of part B; Figure 7 for Figure 6 A schematic diagram of the structure of one of the connectors; Figure 8 for Figure 5 AA section view; Fig. 9 A three-dimensional view of the battery pack structure assembly provided by an embodiment of the present invention Figure 4 , wherein the insulating pad and the insulating support are not shown; Fig.10A three-dimensional view of the battery pack structure assembly provided by an embodiment of the present invention Figure 5 , wherein the insulating pad and the insulating support are not shown; Fig.11 It is a schematic diagram of the assembly of the end plate, the spacing bracket, the insulating heating sheet and the gasket used in the embodiment of the present invention; Fig.12 This is a schematic diagram of assembling the end plate and the buffer pad layer used in the embodiment of the present invention; Fig.13 A three-dimensional diagram of a support frame used in an embodiment of the present invention; Description of reference numerals: 1. Cell row; 110. Cell; 2. First conductive row; 210. First buffer protrusion; 3. End plate; 310. Inter-row plate; 320. End plate; 330. Connector; 331. First surface; 332. Second surface; 333. Third surface; 334. Fourth surface; 335. Fifth surface; 336. Hooking groove; 350. Partition; 360. Plate channel; 361. Inter-row channel; 362. End channel; 370. Lifting hole; 4. Battery management module; 5. Insulating heating plate; 6. Second conductive row; 610. Second buffer protrusion; 7. Buffer pad layer; 8. Spacer bracket; 810. Support flange; 9. Pad; 10 , insulating bracket; 1010, first operating slot; 1020, second operating slot; 1030, avoidance hole; 1040, exhaust hole; 1050, avoidance channel; 1060, positioning flange; 1070, positioning buckle; 1080, lead groove; 1090, third operating slot; 11, insulating cushion layer; 1110, avoidance gap; 12, third conductive row; 13, support frame; 1310, plug-in part; 1320, support part; 1321, locking hole; 1322, support shell; 1323, locking hole column; 1324, support rib; 1325, separation rib; 1326, limiting flange; 1330, fixing buckle; 14, fixing belt. DETAILED DESCRIPTION

[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] In the claims, description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. are for distinguishing different objects rather than for describing a specific order.

[0019] In the claims, specification and the above-mentioned drawings of the present invention, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", "high", "low", etc., indicating directions or positional relationships are based on the directions and positional relationships 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 direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the present invention.

[0020] In the claims, specification and the above drawings of the present invention, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0021] In the claims, description and drawings of the present invention, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0022] Please also read Figures 1 to 12 , the battery pack structure assembly provided by the present invention is now described. The battery pack structure assembly includes a plurality of battery cell rows 1, the plurality of battery cell rows 1 are distributed along a first path, each battery cell row 1 includes a plurality of battery cells 110 distributed along a second path, the second path is perpendicular to the first path, and the main expansion direction of the battery cell row 1 is parallel to the second path, and each two battery cell rows 1 are conductively connected through a first conductive row 2; two end plates 3 are arranged opposite to each other along the first path, each end plate 3 includes an inter-row plate 310 and an end-row plate 320 arranged at one end of the inter-row plate 310, the inter-row plate 310 is placed between two adjacent battery cell rows 1, and a connector 330 is provided at the free end of the inter-row plate 310, the connectors 330 in the two end plates 3 are connected to each other, and on the first path, the two connectors 330 have the freedom to move along the second path; the battery cell row 1 is fixed between the end-row plates 320 in the two end plates 3.

[0023] In this embodiment, the main expansion direction of the battery cell array 1 is the main expansion direction of the battery cell 110, and the expansion in other directions can be ignored. In addition, the use of the first conductive bar 2 can enhance the integrity of the connection between the two battery cell arrays 1, which can better promote the overall structural strength of the battery pack structure assembly.

[0024] It should also be noted that the figure shows an exemplary layout of two rows of battery cell columns 1, and each battery cell column 1 has four battery cells 110 (i.e., a two-row eight-string layout). The number of rows of battery cell columns 1 and the number of battery cells 110 in each row are set according to different usage requirements and are not limited here. In addition, the battery cell columns 1 can be arranged in series (e.g., Figure 5 As shown in FIG. 5 ), a parallel layout may be adopted, or a mixed use of series and parallel may be adopted according to different usage requirements, which will not be listed here one by one. In addition, in the same battery cell column 1, each battery cell 110 is generally arranged in series (as shown in FIG. 5 ), and the battery cells 110 in the same battery cell column 1 may also be arranged in parallel according to different usage requirements, which is not limited here.

[0025] The specific structure of the end plate 3 is related to the number of battery cell rows 1. Figures 3 to 5 , Fig.11 and Fig.12 In the case shown in the figure, the end plate 3 is a T-shaped member, which has an inter-column plate 310, and the column end plates 320 extend to both sides of the inter-column plate 310 respectively, and the column end plates 320 limit the two ends of the two battery cell columns 1, and the inter-column plates 310 form a support between the two battery cell columns 1. In other cases, such as the scenario where there are three battery cell columns 1, the end plate 3 is roughly "∏"-shaped, that is, the same column end plate 320 is correspondingly provided with two inter-column plates 310 distributed side by side, and the column end plates 320 extend to both sides of the two inter-column plates 310 respectively, forming three accommodating spaces for accommodating the battery cell columns 1. In other cases, such as the case where there are four battery cell columns 1, the same column end plate 320 is correspondingly provided with three inter-column plates 310, and the other usage scenarios are not listed here one by one.

[0026] Compared with the prior art, the battery pack structure assembly provided in the present embodiment has two oppositely arranged end plates 3, and a storage space for accommodating and fixing the battery cell column 1 is formed between the column end plates 320 of the two end plates 3 and the inter-column plate 310, and a storage space is formed on both sides of the inter-column plate 310, and each battery cell column 1 is respectively placed in a different storage space and fixed in the storage space, so that the multiple battery cell columns 1 form a whole, and then the connection between different battery cell columns 1 is formed through the first conductive row 2, so that the battery cell 110 arrangement form of multiple strings and multiple columns is formed in the same battery pack structure assembly, and there is no need to perform sheet metal fixing and conductive connection between different columns on site. The integrated design effectively simplifies the operation process and reduces the difficulty of operation. At the same time, the integrated design also ensures the stability of the fixation of the battery cell array 1 between the end plates 3, avoids the problem of unreliable fixing effect caused by on-site sheet metal fixation, and effectively improves the reliability of the conductive connection between the battery cell arrays 1. Moreover, since the end plates 3 are connected by the connectors 330, and the two connectors 330 have the freedom to move along the second path, when the battery cell 110 expands, the two end plates 3 can move along the second path to a certain extent, avoiding the problem of excessive extrusion force between the end plates 3 and the battery cell 110, thereby ensuring the normal working performance of the battery cell 110.

[0027] Some specific arrangements of the connectors 330 are as follows: Figure 5 and Figure 6 As shown, the connector 330 is a hook-shaped member, and the connectors 330 in the two end plates 3 are hooked to each other on the second path and have the freedom to move along the second path. The battery pack structure assembly also includes a fixing belt 14, which is arranged around the periphery of the end plate 3 and the battery cell array 1. The hooking method makes the assembly freedom of the two connectors 330 relatively high, the assembly method is relatively simple, and the processing difficulty of the connector 330 is lower. After forming an integral structure with the battery cell array 1, the displacement of the two connectors 330 on the first path is effectively restricted, and there will be no problem of decoupling, so it is only necessary to maintain the position stability on the second path.

[0028] Optionally, on the second path, the connector 330 has a first surface 331, a second surface 332, a third surface 333, a fourth surface 334 and a fifth surface 335 which are connected in sequence along a direction away from the inter-row plate 310, the first surface 331 is approximately perpendicular to the second path, and the second surface 332 is set at an obtuse angle to the first surface 331; the third surface 333 is set at an angle with the second surface 332, and the angle is 60°~100°; the third surface 333 is set at an angle with the fourth surface 334, and the angle is 60°~100°; the fifth surface 335 is approximately perpendicular to the second path, and the fourth surface 334 is set at an obtuse angle to the fifth surface 335; the first surface 331, the second surface 332 and the third surface 333 enclose a hook groove 336. The distance between the first surface 331 and the third surface 333 along the second path is slightly greater than the distance between the third surface 333 and the fifth surface 335 along the second path, so that after the two connectors 330 are assembled, the hook head portion can have a certain amount of movement in the hook groove 336. The specific movable stroke is related to the expansion parameters of the battery cell 110 and is not limited here. In addition, this design method also makes the hook head portion trapezoidal, with higher structural strength, and can bear a stronger pulling force, avoiding the problem of the connector 330 breaking after the battery cell 110 expands.

[0029] Furthermore, rounded corners are used to transition between the second surface 332 and the third surface 333 , and between the third surface 333 and the fourth surface 334 , so as to prevent the connector 330 on the opposite side from being scratched by the edges during assembly and use.

[0030] The specific arrangement of the connectors 330 not shown in other figures is as follows: 1) One of the connectors 330 has a connecting section and a limiting section, the connecting section connects the limiting section and the inter-row plate 310, the limiting section extends along the first path on both sides of the connecting section, so that the cross section of the connector 330 is T-shaped, and the other connector 330 is a C-shaped groove, the depth of the C-shaped groove is slightly greater than the thickness of the limiting section on the second path, so that the limiting section can move in the C-shaped groove along the second path; when assembling, the T-shaped connector 330 needs to be inserted into the C-shaped groove along the third path. 2) The cross sections of the two connectors 330 are both arcs with an arc greater than π. When assembling, one of the connecting hooks needs to be slidably inserted into the other connector 330 along the third path to form a connection similar to a hook connection, and the free ends of the two connectors 330 are spaced a certain distance from each other after assembly to form a movable margin along the second path. The remaining examples are not listed here one by one.

[0031] The battery management module 4 (BMU) is the core component of the battery management system (BMS). It is responsible for real-time monitoring, control and protection of the battery pack to ensure efficient, safe and reliable operation of the battery system. The battery management module 4 (BMU) can realize voltage monitoring (accurately measure the voltage of each battery cell to ensure that the battery operates within a safe voltage range to prevent overcharging and over-discharging), internal resistance monitoring (monitoring the charging and discharging current through a current sensor to prevent overload damage to the battery) and temperature monitoring (built-in temperature sensors monitor the temperature inside the battery pack and the cells to avoid overheating or overcooling of the battery). In addition, the battery management module 4 can also have a built-in self-diagnosis function, which can detect its own working status in real time, record and upload battery fault information, and provide convenience for subsequent maintenance and troubleshooting. In existing energy storage systems, the battery management module 4 is generally set on the main body of the equipment and connected to the battery pack through wiring and other methods. There are many wiring steps, and it is difficult to effectively control the wiring quality during on-site wiring. In order to solve this problem, in some embodiments, see Figures 1 to 4 , Fig. 9 and Fig.10 , a battery management module 4 is installed on the column end plate 320 in one of the end plates 3, and the battery management module 4 is integrated into the battery pack to form a battery pack structure assembly. The battery management module 4 is pre-connected with the electrodes of the battery cell 110, eliminating the need for on-site installation. The reliability of the connection of the battery management module 4 can be effectively controlled through in-factory testing, which not only simplifies the on-site installation steps, but also ensures the reliability of battery monitoring. It should be noted that the battery management module 4 can be connected to the external device through a quick-plug connector, which is simple to connect and has a reliable connection effect.

[0032] On the basis of providing a battery management module 4, the lead-out terminal of the battery cell column is arranged adjacent to the column end plate 320 in another end plate 3, that is, the lead-out terminal and the battery management module 4 are respectively located on the opposite sides of the battery cell column 1, the lead-out terminal is a high-current area, and the battery management module 4 is a low-current area, thereby realizing the separation of strong and weak currents, and improving the reliability and safety of use.

[0033] During specific implementation, the battery management module 4 is fixed to a side of the column end plate 320 facing away from the battery cell column 1 by means of a fastener (such as a threaded connector).

[0034] In some embodiments, see Figures 1 to 12 The inter-row plate 310 and the row end plate 320 both have a plate cavity extending along a third path, the third path being perpendicular to the first path and the second path; a plurality of partitions 350 are provided in the plate cavity, and the plurality of partitions 350 divide the plate cavity into a plurality of plate channels 360 extending along the third path (such as Figure 8As shown). By providing the plate channel 360, multiple force transmission paths are formed in the column end plate 320 and the inter-column plate 310 through the partition 350, which can effectively decompose the assembly force and the extrusion force generated by the battery expansion, improve the bearing strength, and ensure the overall structural strength of the end plate 3.

[0035] Based on the above-mentioned plate channel 360 design, the plate channel 360 on the inter-row plate 310 is the inter-row channel 361, and the plate channel 360 on the row end plate 320 is the row end channel 362. During use, the side of the battery cell 110 generates high heat, especially heat accumulation is easy to occur between two adjacent battery cell rows 1. At this time, the heat of the battery cell 110 can be absorbed by the inter-row end plate 3, and the absorbed heat can be heat-exchanged with the cold air flowing through the inter-row channel 361 to achieve heat dissipation; the heat generated at the end of the battery cell row 1 can also be dissipated through the inter-row channel on the row end plate 320. That is, the inter-row channel 361 and the row end channel 362 of this embodiment can achieve heat dissipation through their own through-type design, ensuring the stable performance of the battery cell 110.

[0036] Optional, see Figure 5 The two adjacent partitions 350 are arranged at an angle, so that the cross-section of the plate channel 360 is triangular or trapezoidal. The triangle and trapezoid have the characteristics of high structural stability, which effectively improves the structural strength of the inter-column plate 310 and the column end plate 320. Even if it is subjected to the squeezing force generated by the expansion of the battery cell 110, the end plate 3 as a whole can effectively maintain its own structural stability.

[0037] In some embodiments, in order to enhance the heat exchange efficiency, taking the inter-row channel 361 as an example, the cross-sectional area of ​​the inter-row channel 361 gradually decreases along the gas flow direction. After the gas enters the inter-row channel 361, the air pressure gradually increases, and the speed of the air flowing out of the inter-row channel 361 increases. On the one hand, a negative pressure environment can be formed on the outlet side of the inter-row channel 361 to ensure that sufficient cold air can flow into the inter-row channel 361. On the other hand, the gas flow rate can be increased to keep the temperature in the channel at a lower level, which is more conducive to improving the heat dissipation efficiency. The column end channel 362 can also adopt a similar setting method, which will not be repeated here.

[0038] In other embodiments, in order to enhance the heat exchange efficiency, taking the inter-row channel 361 as an example, a heat dissipation fin extending along the long axis of the channel is provided in the inter-row channel 361, and a plurality of heat dissipation fins are provided along the circumference of the inter-row channel 361. The heat dissipation fins increase the contact area between the inter-row channel 361 and the cold air, thereby improving the heat exchange efficiency. The row end channel 362 can also be arranged in a similar manner, which will not be described in detail here.

[0039] Since the battery pack is heavy, the assembly process often requires multiple workers to lift and move it to a designated location, which not only consumes a lot of manpower, but also may cause safety accidents due to the battery pack falling off. In order to solve this problem, in some embodiments, the hollow structure of the column end plate 320 is used to open a lifting hole 370 on the side of the column end plate 320 away from the battery cell column 1, see Figure 1 and Figure 2 , and then the battery pack structure assembly is hoisted by the hook of the hoisting equipment, which makes the assembly safer and more convenient. In this embodiment, the hoisting hole 370 is set on the outer wall of the column end plate 320, and there will be no interference between the hook and the battery cell 110, and the reliability of use is higher.

[0040] In some embodiments, see Figure 8 and Fig.11 An insulating heating sheet 5 is provided between two adjacent battery cells 110, and the two adjacent battery cells 110 are conductively connected through a second conductive bar 6. The insulating heating sheet 5 can be used as an insulating pad between the two battery cells 110 to ensure the safety requirements between the two adjacent battery cells 110; in a low temperature environment, the battery cells 110 are heated by the insulating heating sheet 5 to ensure the performance of the battery cells 110. Among them, the implementation methods of the insulating heating sheet 5 include but are not limited to mica heating sheets. The structure of the insulating heating sheet 5 includes an insulating pad and a resistance wire, the resistance wire is embedded in the insulating pad, and the resistance wire has a lead-out end connected to an external power supply device.

[0041] In some embodiments, see Figures 1 to 5 , a second buffer protrusion 610 is formed in the middle of the second conductive row 6, which is arched in the direction away from the battery cell 110, and the second buffer protrusion 610 can be elastically deformed along the second path. After the battery cell 110 expands, the distance between the two electrodes connected to the same second conductive row 6 will change. The second buffer protrusion 610 enables the second conductive row 6 to have a certain elastic deformation ability on the second path, which can better adapt to the expansion and other changes of the battery cell 110; at the same time, since the second buffer protrusion 610 is arched in the direction away from the battery cell 110, the change of the second buffer protrusion 610 will not affect the battery cell 110, and the reliability of use is stronger. Among them, the implementation methods of the second buffer protrusion 610 include but are not limited to single-arch arc protrusions, wavy protrusions, serrated protrusions, etc.

[0042] Similarly, see Figures 1 to 5 A first buffer protrusion 210 is formed in the middle of the first conductive row 2, which is arched away from the battery cell 110. The first buffer protrusion 210 can be elastically deformed along the first path to adapt to the change in the distance between the electrodes of the battery cell 110 on the first path. The first buffer protrusion 210 can be implemented in a manner including but not limited to a single arched arc protrusion, a wavy protrusion, a sawtooth protrusion, etc.

[0043] In some embodiments, see Figure 8 , Fig.11 and Fig.12 An elastic cushion layer 7 is provided between the column end plate 320 and the battery cell 110 at the end. After the battery cell 110 expands, the cushion layer 7 can rely on its own elastic deformation to buffer between the battery cell 110 and the column end plate 320, thereby avoiding direct rigid contact between the battery cell 110 and the column end plate 320, which may cause damage to the battery cell 110. It can also always maintain the contact limiting function on the battery cell 110 when there is a relatively large gap between the column end plate 320 and the battery cell 110. The implementation of the cushion layer 7 includes, but is not limited to, a foam cushion layer, a silicone cushion layer, and the like.

[0044] On the basis of the buffer layer 7, the battery pack structure assembly also includes an insulating spacer bracket 8, which is arranged between the buffer layer 7 and the battery cell column 1, and also between the inter-column plate 310 and the battery cell column 1. The edge of the spacer bracket 8, which is adjacent to the column end plate 320 and away from the insulating bracket 10, is bent to form a supporting flange 810. The supporting flange 810 supports the battery cell 110 at the end, so as to improve the integrity between the battery cell column 1 and the end plate 3. Furthermore, a gasket 9 is also provided on the side of the battery cell column 1 away from the insulating bracket 10, and the edge of the gasket 9 is pressed against the supporting flange 810 to completely cover the back of the battery cell column 1. Among them, the implementation of the spacer bracket 8 includes but is not limited to a PC bracket, and the gasket 9 is an insulating gasket 9, and its implementation includes but is not limited to a PC gasket 9.

[0045] In some embodiments, see Figures 1 to 3 The battery pack structure assembly also includes an insulating bracket 10, which is covered on the power-connected side of the battery cell array 1 (i.e., the side where the electrodes are arranged on the battery cell array 1). The insulating bracket 10 forms an insulating cover on the power-connected side of the battery cell array 1 to ensure safety requirements. Based on this, in order to achieve the installation of the first conductive bar 2 and the second conductive bar 6, the insulating bracket 10 is provided with a first operating groove 1010 corresponding to the first conductive bar 2 and a second operating groove 1020 corresponding to the second conductive bar 6; in order to achieve the electrical connection between the insulating heating plate 5 and the external power supply device, the insulating bracket 10 is provided with a avoidance hole 1030 corresponding to the wiring terminal of the insulating heating plate 5; in order not to affect the exhaust of the battery cell 110, the insulating bracket 10 is provided with an exhaust hole 1040 corresponding to the exhaust valve of the battery cell 110.

[0046] Optionally, in order to avoid affecting the ventilation and heat dissipation effects of the inter-column channels 361 and the column end channels 362 , the insulating bracket 10 does not cover the inter-column end plate 3 , and an avoidance channel 1050 corresponding to the inter-column channel 361 is provided on the insulating bracket 10 .

[0047] In some specific embodiments of the insulating bracket 10, the insulating bracket 10 is plate-shaped, and a positioning flange 1060 is provided on its edge adjacent to the column end plate 320, that is, the insulating bracket 10 has two oppositely arranged positioning flanges 1060, which are clamped with the edges of the battery cell columns 1 on both sides through the two positioning flanges 1060 to achieve fixation of the insulating bracket 10 and the battery cell columns 1.

[0048] In some specific embodiments of the first operation slot 1010 and the second operation slot 1020, the first operation slot 1010 and the second operation slot 1020 may be through slots that are connected along a third path, or the first operation slot 1010 and the second operation slot 1020 may be provided with electrical connection holes corresponding to the electrodes of the battery cell 110 at both ends, and only openings are formed at positions where conductive contact is required, and the conductive bar and the battery cell 110 are isolated and supported at non-conductive contact positions, which is safer and more reliable to use. Furthermore, in order to adapt to operation at the electrical connection hole, the electrode of the battery cell 110 is formed with a connection boss, which extends into the electrical connection hole to facilitate fitting connection with the first conductive bar 2 or the second conductive bar 6.

[0049] Optionally, the coverage area of ​​the first operating groove 1010 is not less than the first conductive bar 2, and the coverage area of ​​the second operating groove 1020 is not less than the second conductive bar 6. During assembly, the insulating bracket 10 is first installed on the battery cell array 1, and then the first conductive bar 2 and the second conductive bar 6 are respectively placed in the corresponding operating grooves, and the first conductive bar 2 and the second conductive bar 6 are respectively limited circumferentially by the first operating groove 1010 and the second operating groove 1020 to avoid unnecessary displacement of the first conductive bar 2 and the second conductive bar 6 during the locking process. Optionally, the first operating groove 1010 is arranged in a conformal manner with the first conductive bar 2, and the second operating groove 1020 is arranged in a conformal manner with the second conductive bar 6, and the gap between the side wall of each operating groove and the first conductive bar 2 or the second conductive bar 6 is not greater than 0.2 mm. In this way, when the first conductive bar 2 and the second conductive bar 6 are locked by threaded fasteners or by welding, the first operating groove 1010 can effectively limit the first conductive bar 2, and the second operating groove 1020 can effectively limit the second conductive bar 6 to prevent the first conductive bar 2 or the second conductive bar 6 from moving, and the locking operation process is very convenient. In the case where the two ends of the first operating groove 1010 and the second operating groove 1020 are respectively provided with power connection holes corresponding to the electrodes of the battery cell 110, the first conductive bar 2 and the second conductive bar 6 are respectively welded to the connection bosses on the electrodes of the battery cell 110.

[0050] Furthermore, positioning buckles 1070 are respectively provided on the edges of the first operating groove 1010 and the second operating groove 1020. After the first conductive bar 2 and the second conductive bar 6 are placed in the corresponding operating grooves, the positioning buckles 1070 are engaged with the first conductive bar 2 or the second conductive bar 6 to limit the displacement of the first conductive bar 2 or the second conductive bar 6 on the third path, thereby achieving pre-positioning of the first conductive bar 2 or the second conductive bar 6 and facilitating subsequent locking operations on the first conductive bar 2 and the second conductive bar 6.

[0051] In some specific embodiments of the positioning buckle 1070, since the first conductive bar 2 and the second conductive bar 6 gradually approach the insulating bracket 10 along the third path and finally enter the corresponding operation groove, in order to facilitate the clamping of the positioning buckle 1070, the positioning buckle 1070 is provided with a guide slope, and on the third path, the guide slope gradually tilts away from the first operation groove 1010 or the second operation groove 1020 along the direction away from the battery cell 110. When the first conductive bar 2 or the second conductive bar 6 is pressed in, the first conductive bar 2 or the second conductive bar 6 moves the positioning buckle 1070 away from the first operation groove 1010 or the second operation groove 1020 by squeezing the guide slope until the first conductive bar 2 or the second conductive bar 6 completely enters the first operation groove 1010 or the second operation groove 1020, and then the positioning buckle 1070 resets to clamp the first conductive bar 2 or the second conductive bar 6, and the clamping pre-positioning is completed.

[0052] In some embodiments, in order to form insulation isolation at the first conductive row 2 and the second conductive row 6, see Figure 8 , Fig.10 and Fig.11 The side of the insulating support 10 away from the battery cell 110 is covered with an insulating cushion layer 11. The insulating cushion layer 11 may be implemented by, but is not limited to, insulating paper.

[0053] Specifically, the insulating pad layer 11 and the insulating bracket 10 can be connected by bonding, threaded connectors, etc. This embodiment exemplarily shows the method of connecting the insulating pad layer 11 and the insulating bracket 10 by threaded connectors. Specifically, the avoidance channel 1050 divides the insulating bracket 10 into shielding areas corresponding to the battery cell columns 1 one by one, and the insulating pad layer 11 is provided with a avoidance notch 1110 corresponding to the avoidance channel 1050. The insulating pad layer 11 can completely cover the above-mentioned shielding area. The parts of the insulating pad layer 11 corresponding to different shielding areas are connected to form a whole through the pad layer, which is more convenient for installation.

[0054] In some embodiments, see Figures 1 to 3On the basis of the battery management module 4 (BMU), in order to connect the wires of the BMU, a lead groove 1080 is provided on the insulating bracket 10, and the lead groove 1080 is connected to the two power connection ends of the first conductive bar 2 and the two power connection ends of the second conductive bar 6 respectively.

[0055] In some specific embodiments of the lead groove 1080, in order to maintain the smoothness of the wiring, the lead groove 1080 includes a main groove and a branch groove, the main groove is set between the two electrodes of the battery cell 110 in the same battery cell column 1, and extends along the second path; the branch groove extends along the first path and is connected to the main groove, and the other end of the branch groove corresponds to each power connection position of the first conductive bar 2 and the second conductive bar 6. More specifically, the lead groove 1080 passes through the avoidance hole 1030 and the exhaust hole 1040, reducing the area of ​​the groove or hole on the insulating bracket 10, and avoiding affecting the structural strength of the insulating bracket 10.

[0056] In some embodiments, see Figures 1 to 9 The lead-out terminal of the cell row is the third conductive bar 12. One end of the third conductive bar 12 is connected to the lead-out electrode of the cell 110, and the other end is fixed to the column end plate 320. The portion fixed to the column end plate 320 forms a mounting hole to connect and fix with an external terminal. In order to achieve support between the third conductive bar 12 and the column end plate 320, the third conductive bar 12 is connected to the lead-out electrode of the cell 110. The third conductive bar 12 is connected to the column end plate 320. Fig.11 and Fig.12 To prevent the third conductive bar 12 from being suspended in the air, and to facilitate the assembly operation with the external terminal, a support frame 13 is provided on the column end plate 320, and the support frame 13 includes a plug-in portion 1310 plugged and fixed with the column end channel 362, and also includes a support portion 1320 supported between the column end plate 320 and the third conductive bar 12. In order to maintain the stability of the plug-in, the plug-in portion 1310 and the column end channel 362 are arranged in a conformal manner.

[0057] Optionally, in order to facilitate the installation of the third conductive bar 12, a third operating slot 1090 corresponding to the third conductive bar 12 is provided on the insulating bracket 10. The third operating slot 1090 is arranged in a similar manner to the first conductive slot and the second conductive slot, and will not be described in detail here.

[0058] See also Fig.13 Optionally, the support portion 1320 and the third conductive bar 12 are only in close contact, or the support portion 1320 and the third conductive bar 12 are fixed by welding or bonding; a locking hole 1321 is provided on the support portion 1320, and a through hole corresponding to the locking hole 1321 is provided on the third conductive bar 12. The third conductive bar 12 and the external terminal are locked by a fastener, and after the fastener passes through the external terminal and the third conductive bar 12, it cooperates with the locking hole 1321 (for example, threaded cooperation) to achieve fastening.

[0059] Furthermore, the support portion 1320 includes a support shell 1322, a locking hole column 1323 and a support rib 1324. The support shell 1322 is connected to the plug-in portion 1310, and the locking hole column 1323 is disposed in the support shell 1322. The support rib 1324 is radially supported between the side walls of the support shell 1322 and the locking hole column 1323. In this way, it can not only meet the demand for setting the locking hole 1321, but also form a hollow in the support portion 1320 while ensuring the structural strength of the surrounding area of ​​the locking hole 1321 to achieve a weight reduction design. More specifically, if multiple locking holes 1321 are set on the same support portion 1320, a partition rib 1325 is also provided in the support shell 1322 to divide the inner cavity of the support shell 1322 into multiple accommodating cavities, and the locking hole columns 1323 are respectively arranged in different accommodating cavities, and the support rib 1324 is supported between the locking hole column 1323 and the side wall of the accommodating cavity.

[0060] Optionally, a side edge of the supporting shell 1322 is provided with a limiting flange 1326 , and the limiting flange 1326 can form a limit on both sides of the third conductive bar 12 , so as to facilitate the limiting of the third conductive bar 12 during assembly.

[0061] Optionally, on the basis of providing the support portion 1320, for the convenience of connection, a step difference is formed between the end surface of the support portion 1320 and the end surface of the battery cell 110, and the end surface of the support portion 1320 may be higher than the end surface of the battery cell 110, or the end surface of the support portion 1320 may be lower than the end surface of the battery cell 110 (e.g. Fig. 9 As shown in FIG. 1 ), the third conductive row 12 can be correspondingly designed into a corresponding stepped bending structure.

[0062] Optionally, a fixing buckle 1330 is formed on the side wall of the plug-in portion 1310, and a clamping hole corresponding to the clamping end of the fixing buckle 1330 is formed on the side wall of the corresponding column end channel 362. In this way, the plug-in portion 1310 and the column end channel 362 are arranged as a transition fit or a clearance fit, and the final fixation is achieved by clamping, thereby avoiding the assembly difficulty caused by the interference fit between the plug-in portion 1310 and the column end channel 362 and the problem of excessive stress in the plug-in area of ​​the column end plate 320.

[0063] 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 and improvements 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 pack structure assembly, characterized in that: include: A plurality of battery cell rows (1), wherein the plurality of battery cell rows (1) are distributed along a first path, each of the battery cell rows (1) comprises a plurality of battery cells (110) distributed along a second path, the second path being perpendicular to the first path, and a main expansion direction of the battery cell rows (1) being parallel to the second path, and each two battery cell rows (1) are conductively connected via a first conductive bar (2); Two end plates (3) are arranged opposite to each other along a first path, each end plate (3) comprises an inter-row plate (310) and an end plate (320) arranged at one end of the inter-row plate (310), the inter-row plate (310) is arranged between two adjacent battery cell rows (1), a connector (330) is arranged at a free end of the inter-row plate (310), the connectors (330) in the two end plates (3) are connected to each other, and on the first path, the two connectors (330) have the freedom to move along a second path; the battery cell row (1) is fixed between the end plates (320) in the two end plates (3).

2. The battery pack structure assembly according to claim 1, characterized in that: A battery management module (4) is installed on the column end plate (320) in one of the end plates (3), and the lead-out terminals of the battery cell column (1) are arranged adjacent to the column end plate (320) in another of the end plates (3).

3. The battery pack structure assembly according to claim 1, characterized in that: The inter-row plate (310) and the row end plate (320) both have a plate cavity extending along a third path, wherein the third path is perpendicular to the first path and the second path; a plurality of partitions (350) are arranged in the plate cavity, and the plurality of partitions (350) divide the plate cavity into a plurality of plate channels (360) extending along the third path.

4. The battery pack structure assembly according to claim 3, characterized in that: A hoisting hole (370) is provided on a side of the row end plate (320) facing away from the battery cell row (1).

5. The battery pack structure assembly according to claim 1, characterized in that: The connecting head (330) is a hook-shaped component. The connecting heads (330) in the two end plates (3) are hooked to each other on the second path and have the freedom to move along the second path. The battery pack structure assembly also includes a fixing belt (14), and the fixing belt (14) is arranged around the periphery of the end plate (3) and the battery cell array (1).

6. The battery pack structure assembly according to any one of claims 1 to 5, characterized in that: An insulating heating plate (5) is provided between two adjacent battery cells (110), and the two adjacent battery cells (110) are conductively connected via a second conductive bar (6).

7. The battery pack structure assembly according to claim 6, characterized in that: A second buffer protrusion (610) is formed in the middle of the second conductive row (6) and is arched in a direction away from the battery core (110), and the second buffer protrusion (610) can be elastically deformed along a second path.

8. The battery pack structure assembly according to any one of claims 1 to 5, characterized in that: An elastic buffer layer (7) is provided between the column end plate (320) and the battery core (110) located at the end.

9. The battery pack structure assembly according to claim 6, characterized in that: The battery pack structure assembly also includes an insulating bracket (10), the insulating bracket (10) being arranged to cover the power connection side of the battery cell row (1), and the insulating bracket (10) being provided with a first operating slot (1010) corresponding to the first conductive row (2), a second operating slot (1020) corresponding to the second conductive row (6), a position avoidance hole (1030) corresponding to the connection terminal of the insulating heating plate (5), and an exhaust hole (1040) corresponding to the exhaust valve of the battery cell (110).

10. The battery pack structure assembly according to claim 9, characterized in that: The side of the insulating support (10) facing away from the battery core (110) is covered with an insulating cushion layer (11).

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