Stacked battery module and battery pack system

Abstract

The utility model discloses a stacked battery module. The stacked battery module comprises batteries, a single-chip wiring bracket, a connecting bar and an end plate, the battery comprises a plurality of battery cells which are arranged in sequence; the single-chip wiring brackets are positioned on the upper surfaces of top covers of the battery cells, and the battery cells are in one-to-one correspondence with the single-chip wiring brackets; the connecting bar is positioned at the upper part of the single-chip wiring bracket and is electrically connected with a pole of the battery cell; and the battery cells as well as the battery cells and the end plates form a whole by using structural adhesive. The stacked battery module can ensure close contact of each component of the battery, so that the overall structure of the battery module is firmer, deformation and abrasion caused by heating of the battery cells are avoided, the problem of poor contact between the positive and negative diaphragms is avoided, the cycle life of battery circulation is prolonged, the safety of battery circulation is improved, the internal resistance and internal polarization of the battery are reduced, and the service life of the battery is prolonged. And the rate capability of the battery is improved. The utility model further discloses a battery pack system.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy battery manufacturing technical field more specifically, relate to a kind of stacked battery module and battery package system. BACKGROUND

[0002] With the development of science and technology, lithium battery is more and more common in the application of automobile, energy storage, communication and other fields. The battery module is combined by the battery cell in series and parallel connection, and the single battery monitoring and management device is installed, then the position of the battery cell is fixed and the deformation of the battery cell is protected. The performance of the battery module as the core component of the battery package directly affects the life and safety of the power system. Since the plastic film of the square aluminum shell battery cell shell is easy to break, it is easy to cause insulation failure, so many structures for protecting the battery cell need to be designed for the battery module, such as inserting epoxy plate between the battery cells. However, this design will reduce the efficiency of the module, and the hardness and strength of the epoxy plate are not high. Since the battery cell has a certain internal resistance, heat will be generated during the charging and discharging process, which will cause the battery cell to swell slightly, and the size of the internal parts of the battery cell will change accordingly. The epoxy plate with low strength and hardness will deform with the expansion of the battery cell. After a long time, the wear between the electrodes may occur, and when the wear reaches a certain degree, the positive and negative poles of a certain part may be short-circuited, and the epoxy plate and other parts between the battery cells may be broken, which may cause explosion, fire and other accidents, which will cause unpredictable loss to the person and property.

[0003] Therefore, how to make the overall structure of the battery module more solid, avoid deformation and wear caused by heat generation of the battery cell, and improve the cycle life and safety of the battery is a technical problem to be solved. CONTENT OF THE UTILITY MODEL

[0004] To solve the above technical problems, the utility model provides a stacked battery module and battery package system, which can ensure that the components of the battery are in close contact, make the overall structure of the battery module more solid, avoid deformation and wear caused by heat generation of the battery cell, avoid poor contact between the positive and negative electrodes, improve the cycle life and safety of the battery, reduce the internal resistance and internal polarization of the battery, and improve the rate performance of the battery.

[0005] The stacked battery module provided by the utility model comprises a battery, a single-wire running support, a connecting row and an end plate.

[0006] The battery comprises a plurality of battery cells arranged in sequence.

[0007] The single-wire running support is located on the top cover of the battery cell, and the battery cell and the single-wire running support correspond one by one.

[0008] The connecting strip is located at the upper part of the single-piece wiring support and is electrically connected with the pole of the battery cell.

[0009] The battery cell and the end plate are connected together by structural glue.

[0010] Preferably, in the above-mentioned stacked battery module, the upper surface of the single-piece wiring support is provided with a wiring groove area, and the wiring groove area is provided with a through hole matching the shape and position of the explosion-proof valve of the battery cell.

[0011] Preferably, in the above-mentioned stacked battery module, the single-piece wiring support is further provided with a square hole matching the shape and position of the pole of the battery cell, and the pole of the battery cell is exposed on the upper surface of the single-piece wiring support after passing through the square hole.

[0012] Preferably, in the above-mentioned stacked battery module, the body of the single-piece wiring support is a rectangular plate matching the shape and size of the battery cell, and the upper surface of the rectangular plate is provided with a plurality of reinforcing ribs, wherein the first type of reinforcing rib is located at the periphery of the square hole, and the second type of reinforcing rib is located at the two sides of the wiring groove area.

[0013] Preferably, in the above-mentioned stacked battery module, the second type of reinforcing rib is provided with a detection line inlet and a first penetrating tape hole for the detection line near the two edges, respectively, and the two ends of the single-piece wiring support are further provided with a second penetrating tape hole for the detection line to pass through and enter the side of the module, and an insulating cover plate mounting column hole is provided adjacent to the second type of reinforcing rib, and the first type of reinforcing rib is further provided with a connecting strip positioning column matching the positioning hole of the connecting strip.

[0014] Preferably, in the above-mentioned stacked battery module, the module binding component is further provided, and the side of the end plate is provided with a limiting groove, and the module binding component passes through the limiting groove and is bound around the side of the module.

[0015] Preferably, in the above-mentioned stacked battery module, the lead-out strip support seat is further provided and mounted on the end plate, and the lead-out strip support seat is used to fix the end part of the positive and negative lead-out strips of the battery module.

[0016] Preferably, in the above-mentioned stacked battery module, an insulating partition plate is further provided between the outermost battery cell and the end plate, and the insulating partition plate and the battery cell, and the insulating partition plate and the end plate are connected together by structural glue.

[0017] Preferably, in the above-mentioned stacked battery module, the end plate has a lifting structure, and the end plate has two module mounting holes at the folded edge for fixing the battery module in the shell.

[0018] The battery pack system provided by the utility model comprises a battery management device and any one of the stacked battery modules as described above.

[0019] As can be seen from the above technical solution, the stacked battery module provided by the utility model has the advantages that the structure adhesive is used to form an integral whole between the battery cells and between the battery cells and the end plate, the integral whole is firm after the structure adhesive is solidified, and thus the integral structure of the battery module is firm, the deformation and abrasion caused by the heating of the battery cells are avoided, the problem of poor contact between the positive and negative diaphragms is avoided, the cycle life and safety of the battery are improved, the internal resistance and internal polarization of the battery are reduced, the rate capability of the battery is improved, one single-wire support is provided for each battery cell, and thus the number of the single-wire supports can be selected according to actual needs, the installation is more flexible, and the battery pack system provided by the utility model is applicable to the production of batteries of more sizes. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only embodiments of the utility model, and other drawings can be obtained by the drawings provided by the person skilled in the art without creative labor.

[0021] Figure 1 The utility model provides an embodiment of a stacked battery module for the whole assembly schematic view of the utility model;

[0022] Figure 2 The utility model provides an embodiment of a stacked battery module for the explosion view of the utility model;

[0023] Figure 3 The utility model provides a structure schematic view of a single-wire support of a stacked battery module;

[0024] Figure 4 For Figure 2 The enlarged view of A in the middle;

[0025] Figure 5 The limiting groove provided at the side edge of the end plate is shown in the schematic view. DETAILED DESCRIPTION

[0026] The utility model discloses a core provides a kind of stacked battery module and battery package system, can guarantee the close contact of battery each partial assembly, let the overall structure of battery module be more solid, avoid the deformation and abrasion caused by battery cell heating, avoid the problem of contact failure between positive and negative diaphragm, improve the cycle life and safety of battery, reduce battery internal resistance and internal polarization, improve battery rate performance.

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0028] The utility model provides a kind of stacked battery module's embodiment as Figure 1 And Figure 2 As shown in Figure 1 It is the schematic diagram of the overall assembly of the embodiment of the stacked battery module provided by the utility model, Figure 2 It is the exploded view of the embodiment of the stacked battery module provided by the utility model, the stacked battery module can include battery 1, single piece wiring support 2, connecting row 3 and end plate 4;The battery 1 can include multiple sequentially arranged battery cells 11;The single piece wiring support 2 is located on the top cover of battery cell 11 upper surface, and battery cell 11 and single piece wiring support 2 one-to-one correspondence, that is, the upper surface of each battery cell 11 is provided with a single piece wiring support 2 with shape size matched therewith, and the lower part of each single piece wiring support 2 only has one battery cell 11, and multiple single piece wiring supports 2 are arranged in a row on the top of multiple battery cells 11;The connecting row 3 is located on the upper part of single piece wiring support 2, and is electrically connected with the pole 12 of battery cell 11, specifically Figure 4 , Figure 4 It is Figure 2 Enlarged view of A, the connecting row 3 can be installed on the mounting column 10 on the single piece wiring support 2 on the top cover of battery cell through the positioning hole 9 opened on the upper surface, which can ensure the accurate connection of the two, so as to improve the connection effect of the overall module, and the connecting row 3 can be first attached with the pole 12 to accurately position, and then the connecting row 3 and the pole 12 are fixed together by laser welding, realizing the electrical connection between the two, which can improve the welding quality of the connecting row;Battery cell 11, battery cell 11 and end plate 4 are formed into a whole by structural adhesive, and the structural adhesive forms a solid structure with very high strength and hardness after solidification, which can resist the force formed by battery expansion.

[0029] It should be noted that the battery can be preferably a square aluminum shell battery, and the square structure can ensure that the respective batteries form a parallel arrangement of stacked structures. Of course, other types of batteries can also be selected, and the battery is formed by arranging the battery cells together. The above connection row 3 can be preferably an aluminum row, which is electrically connected to the pole 12 to achieve the purpose of electrical connection with all the batteries in the module. The connection mode includes series and parallel connection, that is, the connection row is used to achieve the overall electrical connection between the plurality of battery cells, and the purpose is to achieve the simultaneous input and output of the battery power. In addition, the side surface of any battery cell 11 is fixed to the side surface of the adjacent battery cell 11 by using structural glue. This structural glue is a high-strength and high-viscosity adhesive that can provide strong and durable adhesion between the battery cells 11 to increase friction and maintain its shape under stress. It forms a firm constraint on the battery cells 11, even if one or more battery cells expand due to thermal expansion and contraction. The structural glue can ensure that it does not deform itself, thereby protecting the adjacent battery cells from deformation due to compression. Here, epoxy structural glue, acrylic structural glue, polyurethane structural glue, anaerobic glue, or silicone glue can be used, but not limited to. In addition, the battery cell 11 located at the edge portion and the end plate 4 are also connected by structural glue to form a whole. The effect achieved is that even if the battery cell 11 located at the edge portion has the possibility of expansion, it will be constrained by the structural glue to maintain its shape, thereby effectively protecting the adjacent end plate 4 from bending or breaking. It can be seen that this connection method using structural glue improves the overall stability and firmness of the module, thereby prolonging the service life of the module.

[0030] It should also be noted that the above single-wiring support 2 corresponds to the battery cell 11 one by one, that is, the support in this scheme is not integral, but is split. This can have greater flexibility. Specifically, when a certain module needs to be assembled with a predetermined number of battery cells, the predetermined number of single-wiring supports can be selected, and all these single-wiring supports can be placed on the top of the battery cells. The top of the single-wiring support can be arranged to form a wiring slot for aluminum row wiring to facilitate wiring in the battery module. When other modules require different numbers of battery cells, the number of single-wiring supports can be easily adjusted. It can be seen that this scheme does not need to make multiple types of supports that can accommodate various numbers of battery cells in advance, but only needs to produce single-wiring supports of the same specification. This can be mass-produced automatically, thereby greatly improving production efficiency. In addition, it should be noted that the single-wiring support 2 can be made of insulating material to achieve insulation. Specifically, ABS and PC composite materials can be used, which have a UL-V0 flame retardant rating, thereby further improving the safety of the battery.

[0031] From the above technical solutions can be seen, the utility model provides the embodiment of the above stacked battery module, because the structure glue is used between the electric core, the electric core and the end plate forms a whole, the structure glue becomes solid whole after solidification, and the whole cannot be deformed because of external force, so that the close contact of each part of the battery assembly can be guaranteed, the overall structure of the battery module is more solid, the deformation and wear caused by the heating of the electric core are avoided, the problem of poor contact between the positive and negative diaphragms is avoided, the cycle life and safety of the battery are improved, the internal resistance and internal polarization of the battery are reduced, the battery rate performance is improved, and because each electric core corresponds to a single piece of wiring support, the corresponding number of wiring supports can be selected according to actual needs, so that the installation is more flexible, and the production of more size batteries can be applied.

[0032] In one specific embodiment of the above stacked battery module, referring to Figure 3 , Figure 3 The structure diagram of the single piece of wiring support of the stacked battery module provided by the utility model, the upper surface center part of the single piece of wiring support 2 can be provided with a wiring groove area 21, the wiring groove area 21 is the area for the wiring to pass through, and the wiring groove area 21 is provided with a through hole 22 matched with the shape and position of the explosion-proof valve on the electric core upper cover. It should be noted that the through hole 22 corresponds to the position of the explosion-proof valve on the electric core upper cover, because the internal pressure changes during the charging and discharging of the electric core, the explosion-proof valve can effectively balance the pressure to prevent explosion. On this basis, continuing to refer to Figure 3 The single piece of wiring support 2 can also be provided with a square hole 23 matched with the shape and size of the electric core pole and the position thereof, the pole of the electric core is exposed on the upper surface of the single piece of wiring support 2 after passing through the square hole 23, and the square hole 23 can effectively constrain the side surface of the pole, so that the stability of the whole battery module is better, and the exposed pole can ensure effective electrical connection with the connecting plate. Further, continuing to refer to Figure 3The body of the single-wiring support 2 is preferably a rectangular plate matching the shape and size of the battery cell, and the upper surface of the rectangular plate is provided with a plurality of reinforcing ribs. The first type of reinforcing rib 24 is located at the periphery of the square hole 23, so that the first type of reinforcing rib 24 can reinforce the strength of the position where the square hole 23 is located to prevent bending at this position. The second type of reinforcing rib 25 is located on both sides of the wiring groove area 21, so that the area of the wiring groove can be limited to avoid the wiring passing through this area, thereby ensuring that the wiring is more standardized and aesthetic, and the second type of reinforcing rib 25 can reinforce the strength of the wiring groove to prevent bending at this position. The specific shape can be determined according to actual needs, and the blank can be reserved in the local part without reinforcement to save manufacturing materials, and holes can also be opened in the places where holes are needed. In addition, the second type of reinforcing rib 25 can be connected with the first type of reinforcing rib 24 through the third type of reinforcing rib 20 to further increase the overall strength. Further, with reference to Figure 3 , the second type of reinforcing rib 25 is provided with a detection line inlet 26 and a first penetrating tape hole 27 for passing through the detection line near the two edges, so that the detection line has a dedicated line path, thereby making the module more standardized. The two ends of the single-wiring support 2 are also provided with a second penetrating tape hole 28 for passing through the detection line and entering the side of the module. It should be noted that when the number of detection lines is large, the first penetrating tape hole 27 is insufficient in space, so a part of the detection lines can be passed through the second penetrating tape hole 28 and walked out from the side of the module, thereby avoiding crowded wiring. An insulating cover plate mounting column hole 29 is arranged adjacent to the second type of reinforcing rib 25, and when the insulating cover plate is covered thereon, the insulating cover plate mounting column hole 29 is inserted into the insulating cover plate mounting column hole 29, thereby achieving tight covering of the cover plate and forming a more secure protection for the top surface of the module. In combination with Figure 4 , the first type of reinforcing rib 24 is also provided with a connecting row positioning column 10 matching the positioning hole 9 on the connecting row 3, so that the connecting row can be firmly connected and avoid falling off during operation.

[0033] In another embodiment of the stacked battery module, with reference to Figure 1 , and with reference to Figure 5 , Figure 5The limiting groove provided for the side edge of the end plate is shown in the schematic view, and the stackable battery module can further comprise a module bundling component 7, and the side edge of the end plate 4 is provided with a limiting groove 43, and the module bundling component 7 passes through the limiting groove 43 and is wrapped around the side of the module. Specifically, the module bundling component 7 can be a packing belt, and a plastic steel packing belt with relatively high strength can be further selected. Since a certain constraint force is formed after packing, it can play a role in limiting the deformation of the module together with the structural adhesive, further avoiding the bulging deformation of the battery during the charging and discharging cycle, and better ensuring the stability of the battery module structure. At the same time, due to the existence of such a constraint force, the cycle life of the battery can be improved. The width of the limiting groove 43 should match the width of the module bundling component 7 to ensure that the module bundling component 7 can be accommodated, and the module bundling component should not slide up and down inside it. Moreover, the depth of the limiting groove 43 can be the same as or slightly smaller than the thickness of the module bundling component 7. In this way, the outer surface of the module bundling component 7 after bundling can be flush with the surface of the end plate 4 or inside the end plate 4, which can facilitate transportation, ensure strength, and avoid friction with the surface of other modules, thereby avoiding breakage of the module bundling component 7 after being worn out. Further, the number of limiting grooves 43 can be preferably two, and two module bundling components 7 are wrapped around the side of the module. In this way, a more powerful constraint can be formed near the upper and lower parts of the side of the module, so that the structural stability of the entire battery is better, and the cycle life is further improved. Of course, more limiting grooves and more packing belts can be provided according to actual needs to meet different needs of different modules for structural stability.

[0034] In another embodiment of the stackable battery module described above, with continued reference to Figure 1 The stackable battery module can further comprise a lead-out row support seat 5 mounted on the end plate 4, and the lead-out row support seat 5 is used to fix the end part of the positive and negative lead-out rows 6 of the battery module. It should be noted that the lead-out row can also be preferably an aluminum row, which also serves as a conductor. Since it is located at the edge, it is called a lead-out row, and the aluminum row that is not located at the edge is the connection row 3 described above. By providing the lead-out row support seat 5, the lead-out row can be tightly connected with the lead-out row support seat 5 by bolts, so that the lead-out row can be stably placed therein, and the lead-out row can be better insulated and protected from external factors or uncertain internal factors, thereby better exerting the performance of the battery cell.

[0035] In a preferred embodiment of the stackable battery module described above, with continued reference to Figure 2The outermost cell 11 in the battery and the end plate 4 are further provided with an insulating partition plate 8, and the insulating partition plate 8 and the cell 11 and the insulating partition plate 8 and the end plate 4 are connected together by structural glue, so that the three can form a tight whole, avoid expansion after the battery is heated and affect the battery performance, and further, the insulating partition plate 8 can be made of epoxy resin or PC, or other materials, which is not limited here.

[0036] In another preferred embodiment of the stacked battery module, continuing to refer to Figure 2 The end plate 4 has a lifting structure 41, and the end plate 4 has two module mounting holes 42 for fixing the battery module in the shell. Specifically, the lifting structure 41 can facilitate the assembly of the battery module into the cabinet shell, and the module mounting hole 42 can be provided with two long circular holes, which can be adjusted according to the actual needs of the module position, so as to more conveniently fix the module, and of course other shapes of module mounting holes can be selected according to actual needs, which is not limited here, and the end plate 4 is further provided with a lead-out row support seat mounting hole 44.

[0037] In an embodiment of the battery pack system provided by the utility model, the battery management device and any one of the above-mentioned stacked battery modules are included. Since the battery pack system adopts the above-mentioned stacked battery module, the close contact of each part of the battery can be ensured, the overall structure of the battery module is more solid, the deformation and wear caused by the heating of the cell are avoided, the problem of poor contact between the positive and negative separators is avoided, the cycle life and safety of the battery cycle are improved, the internal resistance and internal polarization of the battery are reduced, and the rate performance of the battery is improved.

[0038] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A stacked battery module, characterized by, The battery includes a battery, a single-wiring support, a connecting row and an end plate; The battery includes a plurality of sequentially arranged battery cells; The single-wiring support is located on the top cover of the battery cell, and the battery cell and the single-wiring support are one-to-one corresponding; The connecting row is located on the upper part of the single-wiring support and is electrically connected with the pole of the battery cell; The battery cells and the end plate are connected together by structural glue.

2. The stacked battery module of claim 1, wherein, The upper surface of the single-wiring support is provided with a wiring groove area, and a through hole is formed in the wiring groove area, which matches the shape and position of the explosion-proof valve of the battery cell.

3. The stacked battery module of claim 2, wherein, The single-wiring support is also provided with a square hole which matches the shape and size of the pole of the battery cell, and the pole of the battery cell is exposed on the upper surface of the single-wiring support after passing through the square hole.

4. The stacked battery module according to claim 3, wherein: The body of the single-wiring support is a rectangular plate which matches the shape and size of the battery cell, and the upper surface of the rectangular plate is provided with a plurality of reinforcing ribs, wherein the first type of reinforcing rib is located on the periphery of the square hole, and the second type of reinforcing rib is located on both sides of the wiring groove area.

5. The stacked battery module of claim 4, wherein, The second type of reinforcing rib is provided with a detection line inlet and a first penetrating tape hole for the detection line, and the two ends of the single-wiring support are also provided with a second penetrating tape hole for the detection line to pass through and enter the side of the module, and an insulating cover plate mounting column hole is arranged adjacent to the second type of reinforcing rib, and the first type of reinforcing rib is also provided with a connecting row positioning column which matches the positioning hole of the connecting row.

6. The stacked battery module of claim 1, wherein, The module binding component is also included, and the side of the end plate is provided with a limiting groove, and the module binding component passes through the limiting groove and is bound around the side of the module.

7. The stacked battery module of claim 1, wherein, The lead-out row support seat is also installed on the end plate, and the lead-out row support seat is used to fix the end of the positive and negative lead-out row of the battery module.

8. The stacked battery module of claim 1, wherein, The insulating partition plate is also arranged between the outermost battery cell and the end plate in the battery, and the insulating partition plate is connected together with the battery cell and the end plate by structural glue.

9. The stacked battery module of claim 1, wherein, The end plate is provided with a lifting structure, and the end plate is provided with two module mounting holes for fixing the battery module in the shell.

10. A battery pack system characterized by, The battery management device and the stacked battery module as claimed in any one of claims 1-9 are included.

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