Battery module and battery system

Abstract

The utility model discloses a battery module and a battery system. The battery module comprises two end plates and a cylindrical battery cell, the end plates are provided with inter-plate connecting parts, the cylindrical battery cell is arranged between the two end plates, and the center line of the cylindrical battery cell is perpendicular to the end plates. Wherein the adjacent battery modules are connected through the inter-plate connecting parts. In the process of assembling the battery modules into a battery pack, a plurality of battery modules can be connected into a whole and then uniformly fixed on a box shell of a battery system. When the battery module is connected with the box shell of the battery system, the single battery modules are connected, so that the stability of the battery module after being fixed is better.

Description

Technical Field

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

[0002] A battery pack usually includes a shell and multiple battery modules, each of which is contained in the shell and fixed to the shell by fasteners. Because the battery modules have no connection or limit fit relationship with each other, each battery module needs to be stably fixed to the shell by more fasteners, so that the assembly of the battery pack requires more materials and the workload of workers is large, which is not conducive to improving work efficiency.

[0003] In view of this, the present utility model is proposed. Utility Model Content

[0004] The utility model provides a battery module and a battery system.

[0005] The utility model adopts the following technical solutions:

[0006] The first object of the present application is to provide a method comprising:

[0007] Two end plates, each end plate being provided with an inter-plate connecting portion;

[0008] A cylindrical battery cell, wherein the cylindrical battery cell is disposed between the two end plates, and the center line of the cylindrical battery cell is perpendicular to the end plates;

[0009] Wherein, adjacent battery modules are connected via inter-plate connecting parts.

[0010] Optionally, the inter-plate connecting portion includes a clamping protrusion and a clamping groove arranged on the end plate;

[0011] Of the two directly connected battery modules, the protrusion of one is inserted into the slot of the other.

[0012] Optionally, the locking groove and the locking protrusion are both arranged on the thickness end surface of the end plate.

[0013] Optionally, the slot is a dovetail slot, and the cross section of the protrusion matches the cross section of the slot.

[0014] The second object of the present application is to provide a battery system, comprising:

[0015] A box shell, wherein the box shell has a cavity;

[0016] A plurality of battery modules, each of which is disposed in the cavity and laid on the bottom plate of the box shell, and adjacent battery modules are connected via inter-plate connecting portions;

[0017] Each of the battery modules is fixedly connected to the box shell by fasteners.

[0018] Optionally, of the two end plates in the adjacent battery modules that are located in the same plane, the latching protrusion on one is inserted into the latching groove on the other.

[0019] Optionally, among the battery modules sequentially arranged in a direction perpendicular to the end plate, two adjacent battery modules are detachably connected via an inter-plate connector.

[0020] Optionally, the inter-board connector includes a board body and two clamping protrusions or clamping grooves arranged on the board body;

[0021] The plate body is perpendicular to the end plate;

[0022] The two clamping protrusions or clamping grooves on the inter-board connecting member are respectively clamped on two adjacent battery modules.

[0023] Optionally, in a direction perpendicular to the end plates, there is a gap between the end plates of two adjacent battery modules.

[0024] Optionally, the end plate is provided with a connection ear for connection and fixation;

[0025] The inter-plate connecting piece is provided with connecting ears for connecting and fixing.

[0026] By adopting the above technical solution, the utility model has the following beneficial effects:

[0027] In the process of assembling battery modules into a battery pack, the present application provides that multiple battery modules can be connected to form a whole, and then uniformly fixed on the box shell of the battery system. While the battery module is connected to the box shell of the battery system, the individual battery modules are connected to each other, so that the stability of the battery module after being fixed is better. In addition, after increasing the connection between adjacent battery modules, the connection points between some battery modules and the box shell can also be reduced, which can save installation space and make the assembled battery system smaller.

[0028] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are part of this application and are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model, but do not constitute an improper limitation on the utility model. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0030] Figure 1A schematic diagram of the three-dimensional structure of a battery module provided in an embodiment of the present application is shown;

[0031] Figure 2 A schematic diagram of the structure of a battery module in one direction after multiple connections are made according to an embodiment of the present application is shown;

[0032] Figure 3 A schematic diagram showing the structure of a battery module in another direction after multiple connections are made according to an embodiment of the present application;

[0033] Figure 4 A schematic structural diagram of an inter-board connector of a battery system provided in an embodiment of the present application is shown;

[0034] Figure 5 A schematic structural diagram of another inter-board connector of a battery system provided in an embodiment of the present application is shown.

[0035] In the figure: end plate 1, cylindrical battery cell 2, clamping protrusion 31, clamping groove 32, inter-board connecting piece 4, connecting ear 5, box shell 6.

[0036] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0038] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying 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 component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Embodiment 1

[0041] See also Figures 1 to 5 As shown, an embodiment of the present application provides a battery module, including two end plates 1 and a cylindrical battery cell 2. An inter-plate connecting portion is provided on the end plate 1, and the cylindrical battery cell 2 is provided between the two end plates 1, and the center line of the cylindrical battery cell 2 is perpendicular to the end plate 1. Among them, adjacent battery modules are connected by an inter-plate connecting portion. In the process of assembling the battery modules into a battery pack, a plurality of battery modules can be connected to form a whole, and then uniformly fixed on the box shell 6 of the battery system. While the battery module is connected to the box shell 6 of the battery system, the single battery modules are also connected to each other, so that the stability of the battery module after being fixed is better. In addition, after increasing the connection or limit fit between adjacent battery modules, the connection points between some battery modules and the box shell 6 can also be reduced, which can save installation space and make the assembled battery system smaller.

[0042] The end plate 1 may be a CCS plate, and a plurality of conductive sheets are arranged on the end plate 1 , and the conductive sheets connect the cylindrical battery cells 2 electrically.

[0043] In some optional embodiments, such as Figures 1 to 3 As shown, the inter-board connection portion includes a protrusion 31 and a slot 32 provided on the end plate 1. Of the two directly connected battery modules, the protrusion 31 of one is inserted into the slot 32 of the other. Adjacent battery modules are connected by a snap connection, which does not require additional fasteners, is convenient to connect, and can ensure stable connection.

[0044] In some optional embodiments, the card slot 32 and the card protrusion 31 are both arranged on the thickness end surface of the end plate 1. A gap can be reserved between two adjacent battery modules along the thickness direction of the end plate, thereby improving the heat dissipation effect of the battery module. Therefore, the card slot 32 and the card protrusion 31 are both arranged on the thickness end surface of the end plate 1.

[0045] In some optional embodiments, the card slot 32 and the card protrusion 31 are respectively located at both ends of the end plate 1. For example, when the end plate 1 is rectangular, the card slot 32 and the card protrusion 31 can be respectively arranged at both ends of the end plate along the length direction. When multiple battery modules are arranged in sequence, the card protrusion 31 of one of two adjacent battery modules can be inserted into the card slot 32 of the other. The length of the battery module can be infinitely connected and extended through this matching structure.

[0046] In some optional embodiments, the slot 32 is a dovetail slot, and the cross section of the protrusion 31 matches the cross section of the slot 32. The cross section of the dovetail slot is trapezoidal, and the width of one side of the slot opening is greater than the width of one side of the slot bottom. After the protrusion 31 and the slot 32 are plugged in, they will not fall out in the direction of the slot depth, ensuring stable plugging. The dovetail slot has a strong bearing capacity and a firm connection effect, good durability, and a longer service life.

[0047] Embodiment 2

[0048] See also Figures 1 to 5 As shown, the present application also provides a battery system, including a box shell 6 and a plurality of battery modules. The box shell 6 has a cavity, each of the battery modules is arranged in the cavity, and each of the battery modules is laid on the bottom plate of the box shell 6, and adjacent battery modules are connected by inter-plate connecting parts. Each of the battery modules is fixedly connected to the box shell 6 by fasteners. The battery system provided in this embodiment uses the battery modules in Example 1, and adjacent battery modules can be connected to ensure that the assembled battery system has better stability. In addition, after increasing the connection between adjacent battery modules, the connection points between some battery modules and the box shell 6 can also be reduced, which can save installation space and make the assembled battery system smaller.

[0049] In some optional embodiments, such as Figures 2 to 3 As shown, in two end plates 1 located in the same plane in adjacent battery modules, the protrusion 31 on one is inserted into the slot 32 on the other. In this way, unlimited connection and expansion can be achieved in the same horizontal plane.

[0050] In some optional embodiments, the battery system further includes an inter-board connector 4, and in each battery module sequentially arranged in the direction perpendicular to the end plate 1, two adjacent battery modules are detachably connected through the inter-board connector 4. The inter-board connector 4 is arranged to connect two adjacent battery modules in the direction perpendicular to the end plate 1, so that the battery module can be infinitely connected and expanded in the direction perpendicular to the end plate 1. In actual production, the battery module in the battery pack can be expanded to a suitable width and height according to the power or size requirements.

[0051] In some optional embodiments, such as Figure 2-5 As shown, the inter-board connector 4 includes a plate body and two clamping protrusions 31 or clamping grooves 32 arranged on the plate body. The plate body is perpendicular to the end plate 1, and the two clamping protrusions 31 or clamping grooves 32 on the inter-board connector 4 are respectively clamped on two adjacent battery modules. The inter-board connector 4 and the battery module are also connected through the clamping protrusions 31 and the clamping grooves 32. The battery module can be directly connected to the inter-board connector 4 using its own clamping grooves 32 and clamping protrusions 31, without the need to set up other connection structures, making the structure simpler and the connection more convenient.

[0052] In some optional embodiments, the end plates 1 of two adjacent battery modules have a gap in the direction perpendicular to the end plates 1. First, the battery module needs to dissipate heat, and the gap between the end plates 1 of two adjacent battery modules is conducive to heat dissipation. Second, the battery module needs to be provided with a connecting ear 5 connected to the box shell 6, and the gap between the end plates 1 of two adjacent battery modules can leave space for the connection ear 5.

[0053] In some optional embodiments, the end plate 1 is provided with a connecting ear 5 for connection and fixing, and the inter-plate connecting member 4 is provided with a connecting ear 5 for connection and fixing. The connecting ear 5 on the end plate 1 can be connected to the bottom wall or side wall of the box shell 6 through a connecting member, and the connecting ear 5 on the inter-plate connecting member 4 can be connected to the bottom wall or side wall of the box shell 6 through a connecting member, wherein the fastener can be a bolt.

[0054] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this patent can make some changes or modify the technical content suggested above into an equivalent embodiment with equivalent changes without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of the solution of the utility model.

Claims

1. A battery module, characterized in that: include: Two end plates, each end plate being provided with an inter-plate connecting portion; A cylindrical battery cell, wherein the cylindrical battery cell is disposed between the two end plates, and the center line of the cylindrical battery cell is perpendicular to the end plates; Wherein, adjacent battery modules are connected via inter-plate connecting parts.

2. The battery module according to claim 1, characterized in that: The inter-plate connecting portion includes a clamping protrusion and a clamping groove arranged on the end plate; Of the two directly connected battery modules, the protrusion of one is inserted into the slot of the other.

3. The battery module according to claim 2, characterized in that: The clamping groove and the clamping protrusion are both arranged on the thickness end surface of the end plate.

4. The battery module according to claim 2, characterized in that: The clamping slot is a dovetail slot, and the cross section of the clamping protrusion matches the cross section of the clamping slot.

5. A battery system, characterized in that: include: A box shell, wherein the box shell has a cavity; A plurality of battery modules, each of which is disposed in the cavity and laid on the bottom plate of the box shell, and adjacent battery modules are connected via inter-plate connecting portions; Each of the battery modules is fixedly connected to the box shell via fasteners.

6. The battery system according to claim 5, characterized in that: Of the two end plates in the adjacent battery modules that are located in the same plane, the latching protrusion on one is inserted into the latching groove on the other.

7. The battery system according to claim 5, characterized in that: In each battery module arranged in sequence along the direction perpendicular to the end plate, two adjacent battery modules are detachably connected via an inter-plate connector.

8. The battery system according to claim 7, characterized in that: The inter-plate connecting member comprises a plate body and two clamping protrusions or clamping grooves arranged on the plate body; The plate body is perpendicular to the end plate; The two clamping protrusions or clamping grooves on the inter-board connecting member are respectively clamped on two adjacent battery modules.

9. The battery system according to claim 7, characterized in that: In the direction perpendicular to the end plates, there is a gap between the end plates of two adjacent battery modules.

10. The battery system according to claim 7, characterized in that: The end plate is provided with a connection ear for connection and fixing; The inter-plate connecting piece is provided with connecting ears for connecting and fixing.

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