Battery module structure and battery pack

Abstract

The utility model provides a battery module structure and a battery pack, and relates to the technical field of battery equipment. The battery module structure comprises a tray and battery cells, a mounting groove is formed in the bottom wall of the tray, a through hole and a containing groove are formed in the bottom wall of the mounting groove, the containing groove is located in the circumferential position of the through hole and communicates with the through hole, and the containing groove and the through hole are both used for being filled with pouring sealant; an anti-explosion valve is arranged at the bottom of the battery cell, and the battery cell is arranged in the mounting groove, so that the anti-explosion valve faces the through hole. The explosion-proof valve is arranged at the bottom of the battery cell and faces the through hole, so that under the conditions that the battery cell is in thermal runaway and the explosion-proof valve is normally opened, airflow sprayed out of the battery cell can break through the pouring sealant and flow out of the through hole, and meanwhile, the pouring sealant can prevent the airflow from flowing to other battery cells and making contact with the explosion-proof valve; the phenomenon of secondary thermal runaway of other battery cells caused by reflux is effectively prevented; the accommodating groove is formed in the bottom wall of the mounting groove, so that the contact area between the pouring sealant and the tray can be increased, and the pouring sealant is restrained and fixed.

Description

Technical Field

[0001] The utility model relates to the technical field of battery equipment, and in particular to a battery module structure and a battery pack. Background Art

[0002] With the rapid development of battery technology, battery safety has gradually received attention, and the battery module thermal runaway disposal technology has become more mature.

[0003] Existing thermal runaway treatment technologies for battery modules are divided into two categories: one is to increase exhaust space inside the module and set up corresponding air guide channels, but this will lead to a complex battery module structure and increase production costs; the other is to set up insulation materials at the location of the explosion-proof valve of the single battery cell, but the insulation materials will also increase material costs and production processes, affecting production efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a battery module structure and a battery pack, which can prevent thermal runaway without adding exhaust channels and heat insulation materials, and have a simpler structure, effectively reducing production costs and improving production efficiency.

[0005] The embodiment of the utility model is achieved as follows:

[0006] In a first aspect, the utility model provides a battery module structure, including a tray and a battery cell;

[0007] The bottom wall of the tray is provided with a mounting groove, the bottom wall of the mounting groove is provided with a through hole and a receiving groove, the receiving groove is located at a circumferential position of the through hole and is connected with the through hole, and the receiving groove and the through hole are both used for filling potting glue; an explosion-proof valve is provided at the bottom of the battery cell, and the battery cell is arranged in the mounting groove so that the explosion-proof valve faces the through hole.

[0008] In an optional embodiment, the accommodating groove is annular and is evenly located at a circumferential position of the through hole.

[0009] In an optional embodiment, there are multiple accommodating grooves, and the multiple accommodating grooves are distributed at circumferential positions of the through hole at equal intervals.

[0010] In an optional embodiment, the bottom wall of the accommodating groove is fan-shaped.

[0011] In an optional embodiment, the bottom wall of the accommodating groove is semicircular.

[0012] In an optional embodiment, the battery module structure further includes a seal, and the seal is disposed between the tray and the battery cell.

[0013] In an optional embodiment, the sealing member is a structural adhesive, and the tray and the bottom wall of the battery cell are bonded to each other by the structural adhesive.

[0014] In an optional embodiment, the number of the mounting slots and the number of the battery cells are both plural, and the multiple battery cells are arranged in the multiple mounting slots in a one-to-one correspondence.

[0015] In an optional embodiment, the plurality of mounting grooves are distributed in multiple rows, and the mounting grooves in two adjacent rows are staggered.

[0016] In a second aspect, the utility model provides a battery pack, comprising a battery module structure as described in any one of the aforementioned embodiments.

[0017] The beneficial effects of the battery module structure and battery pack provided by the embodiment of the utility model include: by setting an explosion-proof valve at the bottom of the battery cell and making the explosion-proof valve face the through hole, when the battery cell is in thermal runaway and the explosion-proof valve is normally opened, the airflow ejected from the battery cell can break through the potting glue and flow out from the through hole, and at the same time, the potting glue can block the airflow from flowing to other battery cells and contacting the explosion-proof valve, effectively preventing the phenomenon of secondary thermal runaway of other battery cells caused by backflow; and because the potting glue itself has a low structural strength, the contact area between the potting glue and the tray can be increased by setting a receiving groove on the bottom wall of the installation groove, and the potting glue can be constrained and fixed to ensure that it is stably set at the through hole when the explosion-proof valve is not opened. It can be seen that the battery module structure provided by the utility model can prevent thermal runaway without adding exhaust channels and heat insulation materials, and the structure is simpler, which effectively reduces production costs and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the battery module structure provided by an embodiment of the utility model;

[0020] Figure 2 A schematic diagram of a tray structure provided in an embodiment of the utility model;

[0021] Figure 3 An enlarged view of a first embodiment of a partial tray provided by an embodiment of the utility model;

[0022] Figure 4 This is an enlarged view of a partial second embodiment of a tray provided in an embodiment of the utility model.

[0023] Icon: 10 - battery module structure; 100 - tray; 110 - mounting slot; 120 - through hole; 130 - receiving slot; 200 - battery cell. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0027] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply 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 a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0028] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 indirectly connected 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 according to specific circumstances.

[0030] With the rapid development of battery technology, battery safety has gradually received attention, and the battery module thermal runaway disposal technology has become more mature.

[0031] Existing thermal runaway treatment technologies for battery modules are divided into two categories: one is to increase exhaust space inside the module and set up corresponding air guide channels, but this will lead to a complex battery module structure and increase production costs; the other is to set up insulation materials at the location of the explosion-proof valve of the single battery cell, but the insulation materials will also increase material costs and production processes, affecting production efficiency.

[0032] Based on the above questions, please refer to Figures 1 to 3 An embodiment of the utility model provides a battery module structure 10 including a tray 100 and a battery cell 200 .

[0033] Among them, the bottom wall of the tray 100 is provided with a mounting groove 110, and the bottom wall of the mounting groove 110 is provided with a through hole 120 and a receiving groove 130, the receiving groove 130 is located in the circumferential position of the through hole 120 (that is, the receiving groove 130 is located around the through hole 120) and is connected with the through hole 120, and the receiving groove 130 and the through hole 120 are both used to fill the potting glue; an explosion-proof valve is provided at the bottom of the battery cell 200, and the battery cell 200 is arranged in the mounting groove 110 so that the explosion-proof valve faces the through hole 120.

[0034] In this embodiment, only a part of the bottom of the battery cell 200 is accommodated in the mounting groove 110, and most of the structure of the battery cell 200 is exposed in the mounting groove 110, and the mounting groove 110 mainly plays a role in fixing the battery cell 200. Therefore, after the battery cell 200 is placed in the mounting groove 110 of the tray 100, potting glue can be poured into the bottom of the battery cell 200 and the through hole 120 of the tray 100.

[0035] By arranging an explosion-proof valve at the bottom of the battery cell 200 and directing the explosion-proof valve toward the through hole 120, when the battery cell 200 is in thermal runaway and the explosion-proof valve is normally opened, the airflow ejected from the battery cell 200 can break through the potting glue and flow out from the through hole 120, and at the same time, the potting glue can block the airflow from flowing to other battery cells 200 and contacting the explosion-proof valve, effectively preventing the backflow from causing secondary thermal runaway of other battery cells 200; and since the potting glue itself has a low structural strength, the accommodating groove 130 is arranged on the bottom wall of the mounting groove 110 to increase the contact area between the potting glue and the tray 100, and to restrain and fix the potting glue, thereby ensuring that it is stably filled in the through hole 120 when the explosion-proof valve is not opened.

[0036] It can be seen that the battery module structure 10 provided by the present invention can prevent thermal runaway without adding exhaust channels and heat insulation materials, and the structure is simpler, which effectively reduces production costs and improves production efficiency.

[0037] Further, there is one accommodating groove 130 , which is annular in shape and evenly located at circumferential positions of the through hole 120 .

[0038] In this embodiment, the accommodating groove 130 is an annular groove, so that the bottom wall of the mounting groove 110 is stepped, so that a larger volume of potting glue can be filled, which effectively restrains the potting glue.

[0039] Of course, in other embodiments of the present invention, for example Figure 4 The number and shape of the accommodating grooves 130 may also be other settings. For example, there are multiple accommodating grooves 130 , and the multiple accommodating grooves 130 are evenly spaced and distributed around the circumference of the through hole 120 .

[0040] In this embodiment, the tray 100 can effectively increase the restraining effect on the potting glue by providing a plurality of accommodating grooves 130. The plurality of accommodating grooves 130 are evenly spaced, so that the potting glue is evenly stressed.

[0041] In detail, the bottom wall of the receiving groove 130 is fan-shaped.

[0042] Specifically, the bottom wall of the receiving groove 130 is semicircular.

[0043] In this embodiment, by configuring the receiving groove 130 to be fan-shaped, for example, semicircular, the potting glue can be effectively restrained.

[0044] Of course, in other embodiments, the bottom wall of the receiving groove 130 may also be in other shapes, which are not specifically limited here.

[0045] Furthermore, the battery module structure 10 further includes a seal (not shown), which is disposed between the tray 100 and the battery cell 200 .

[0046] In this embodiment, a sealing member is provided to seal the battery cell 200 and the tray 100 , thereby preventing the leakage of potting glue when the potting glue is poured into the bottom of the battery cell 200 and the through hole 120 .

[0047] In detail, the sealing member is a structural adhesive, and the tray 100 and the bottom wall of the battery cell 200 are bonded by the structural adhesive.

[0048] In this embodiment, the tray 100 and the bottom wall of the battery cell 200 are bonded together by structural adhesive to achieve a sealing effect; and the bonding process using structural adhesive is simple, has low production cost, and high production efficiency.

[0049] Furthermore, there are plural mounting slots 110 and plural battery cells 200 , and the battery cells 200 are disposed in the mounting slots 110 in a one-to-one correspondence.

[0050] In this embodiment, by providing a plurality of mounting grooves 110 on the tray 100 , a plurality of battery cells 200 can be mounted, which not only ensures the mounting stability of the plurality of battery cells 200 , but also improves the battery capacity.

[0051] Furthermore, the plurality of mounting slots 110 are distributed in multiple rows, and the mounting slots 110 in two adjacent rows are staggered.

[0052] In this embodiment, the installation slots 110 in two adjacent rows are arranged in a staggered manner, so that the installed multiple battery cells 200 are arranged in a staggered manner, thereby effectively utilizing the space of the tray 100 and maximizing the number of installed battery cells 200.

[0053] It can be understood that the staggered arrangement means that the plurality of installation slots 110 are arranged in multiple rows, and in two adjacent rows of installation slots 110, the installation slots 110 in one row correspond to the middle of two adjacent installation slots 110 in the other row.

[0054] Furthermore, the utility model also provides a battery pack, comprising the battery module structure 10 in the above embodiment.

[0055] In summary, the utility model provides a battery module structure 10 and a battery pack, by setting an explosion-proof valve at the bottom of the battery cell 200 and making the explosion-proof valve face the through hole 120, so that when the battery cell 200 is in thermal runaway and the explosion-proof valve is normally opened, the airflow ejected from the battery cell 200 can break through the potting glue and flow out from the through hole 120, and the potting glue can block the airflow from flowing to other battery cells 200 and contacting the explosion-proof valve, effectively preventing the phenomenon of secondary thermal runaway of other battery cells 200 caused by backflow; and because the potting glue itself has a low structural strength, the contact area between the potting glue and the tray 100 can be increased by setting a receiving groove 130 on the bottom wall of the mounting groove 110, and the potting glue can be constrained and fixed to ensure that it is stably filled in the through hole 120 when the explosion-proof valve is not opened. It can be seen that the battery module structure 10 provided by the utility model can prevent thermal runaway without adding exhaust channels and heat insulation materials, and the structure is simpler, which effectively reduces production costs and improves production efficiency.

[0056] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A battery module structure, characterized in that: Including tray and battery cells; The bottom wall of the tray is provided with a mounting groove, the bottom wall of the mounting groove is provided with a through hole and a receiving groove, the receiving groove is located at a circumferential position of the through hole and is connected with the through hole, and the receiving groove and the through hole are both used for filling potting glue; an explosion-proof valve is provided at the bottom of the battery cell, and the battery cell is arranged in the mounting groove so that the explosion-proof valve faces the through hole.

2. The battery module structure according to claim 1, characterized in that: The accommodating groove is annular and is evenly located at circumferential positions of the through hole.

3. The battery module structure according to claim 1, characterized in that: There are multiple accommodating grooves, and the multiple accommodating grooves are evenly distributed at circumferential positions of the through hole.

4. The battery module structure according to claim 3, characterized in that: The bottom wall of the accommodating groove is fan-shaped.

5. The battery module structure according to claim 4, characterized in that: The bottom wall of the accommodating groove is semicircular.

6. The battery module structure according to claim 1, characterized in that: The battery module structure further includes a seal, which is disposed between the tray and the battery cell.

7. The battery module structure according to claim 6, characterized in that: The sealing member is a structural adhesive, and the tray and the bottom wall of the battery cell are bonded together by the structural adhesive.

8. The battery module structure according to claim 1, characterized in that: The number of the installation slots and the number of the battery cells are both multiple, and the multiple battery cells are arranged in the multiple installation slots in a one-to-one correspondence.

9. The battery module structure according to claim 8, characterized in that: The plurality of mounting grooves are distributed in multiple rows, and the mounting grooves in two adjacent rows are staggered.

10. A battery pack, characterized in that: Comprising a battery module structure as described in any one of claims 1 to 9.

Images