Battery module and battery pack

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery module and a battery pack, the battery module comprises a box body, a fixing plate and a battery cell group, the box body is provided with a containing groove, the containing groove is provided with a first side wall, the fixing plate is connected with the groove bottom of the containing groove, and the fixing plate and the first side wall are arranged at an interval along a first direction; the battery cell group comprises a plurality of battery cells which are sequentially arranged along the first direction, the plurality of battery cells are arranged in the accommodating groove, and the plurality of battery cells are clamped between the fixing plate and the first side wall, so that the battery module enables the overall structure of the battery cell group to be more compact on the basis of fixing the battery cell group; and a ribbon and an insulating structure between the ribbon and the battery cell group are also omitted.

Description

Technical Field

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

[0002] As Figure 1 shown, during the grouping process of the battery cells 100' of the battery module, a cable tie 200' is used to bind and fix a plurality of sequentially arranged battery cells 100'.

[0003] The cable tie 200' is usually made of steel material, so the cable tie 200' has certain electrical conductivity. In order to achieve insulation between the cable tie 200' and the battery cell 100', insulation treatment is required. For example, an insulating sleeve is sleeved on the cable tie 200', or an insulating pad is clamped between the cable tie 200' and the battery cell 100'. However, this will not only increase production materials but also make the overall volume of the battery module larger.

[0004] Therefore, it is urgent to propose a battery module and a battery pack to solve the above technical problems. Summary of the Utility Model

[0005] The first object of the utility model is to provide a battery module, which makes the overall structure of the battery cell group more compact on the basis of fixing the battery cell group, and also eliminates the cable tie and the insulation structure between the cable tie and the battery cell group.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A battery module, comprising:

[0008] A box body, the box body is provided with a receiving groove, and the receiving groove has a first side wall;

[0009] A fixing plate, the fixing plate is connected to the bottom of the receiving groove, and the fixing plate and the first side wall are spaced apart along a first direction;

[0010] A battery cell group, the battery cell group includes a plurality of battery cells arranged in sequence along the first direction, and the plurality of battery cells are all arranged in the receiving groove, and the plurality of battery cells are clamped between the fixing plate and the first side wall.

[0011] Optionally, a connecting plate is provided at the bottom of the receiving groove, and the fixing plate is connected to the bottom of the receiving groove through the connecting plate.

[0012] Optionally, the battery module further includes a first connecting member, the first connecting member is provided with a first external thread, the connecting plate is provided with a first threaded hole, the first connecting member passes through the fixing plate, and the first external thread is in threaded cooperation with the first threaded hole.

[0013] Optionally, a avoiding groove is provided on one side of the fixing plate facing the bottom of the receiving groove, and the connecting plate is located in the avoiding groove.

[0014] Optionally, the fixing plate is detachably connected to the bottom of the receiving groove.

[0015] Optionally, the receiving groove further has a second side wall, the second side wall is disposed opposite to the first side wall along the first direction, an opening is provided on the second side wall, and the fixing plate is sealed at the opening.

[0016] Optionally, both edges of the opening opposite to each other are connected to the fixing plate.

[0017] Optionally, the battery module further includes at least two second connecting members. Both edges of the opening opposite to each other respectively correspond to at least one second connecting member. The second connecting member is provided with a second external thread, and the edge of the opening is provided with a second threaded hole. The second connecting member passes through the fixing plate, and the second external thread is in threaded fit with the second threaded hole.

[0018] Optionally, the number of the battery cell groups is more than two. More than two battery cell groups are arranged in the receiving groove along the second direction, and the second direction is perpendicular to the first direction.

[0019] The second object of the present utility model is to provide a battery pack, which has a relatively high energy density and a relatively low production cost.

[0020] To achieve this purpose, the present utility model adopts the following technical solutions:

[0021] The battery pack includes a battery box and the above-mentioned battery module, and the battery module is disposed in the battery box.

[0022] Optionally,

[0023] The beneficial effects of the present utility model:

[0024] In the battery module provided by the present utility model, the fixing plate is spaced apart from the first side wall of the receiving groove along the first direction, and the fixing plate is connected to the bottom of the receiving groove. The multiple battery cells of the battery cell group are arranged in sequence along the first direction, and the multiple battery cells are clamped between the fixing plate and the first side wall. Thus, the fixing of the battery cell group is realized under the clamping cooperation of the fixing plate and the first side wall. Compared with the structure of tying the battery cell group with a cable tie, this way of clamping and fixing the battery cell group can reduce the gap between the battery cells, and further make the overall structure of the battery cell group more compact, having the effect of reducing the overall volume of the battery module; in addition, this way of clamping and fixing the battery cell group eliminates the cable tie and the insulating structure between the cable tie and the battery cell group (the insulating sleeve sleeved on the cable tie and / or the insulating pad clamped between the cable tie and the battery cell), achieving the effect of reducing production materials.

[0025] The battery pack provided by the present utility model adopts the above-mentioned battery module. The overall volume of the battery module is relatively small, and the input of production materials can be reduced. Therefore, it is beneficial to improve the energy density of the battery pack and reduce the production cost of the battery pack. Description of the Drawings

[0026] Figure 1 is a schematic exploded view of a battery module in the prior art;

[0027] Figure 2 is a schematic exploded view of the battery module provided by an embodiment of the present invention.

[0028] In the figure:

[0029] 100', battery cells; 200', cable ties;

[0030] 100, box body; 110, receiving groove; 111, first side wall; 112, opening; 113, second threaded hole; 200, fixing plate; 210, avoidance groove; 300, battery cell group; 310, battery cell; 400, connecting plate; 410, first threaded hole; 510, first connecting member; 520, second connecting member;

[0031] D1, first direction; D2, second direction. Detailed Embodiments

[0032] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the sake of description, only parts related to the present invention are shown in the drawings, rather than all structures.

[0033] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0034] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under", and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0035] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationships shown in the drawings. They are only for convenience of description and simplifying the operations, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] This embodiment provides a battery module, which makes the overall structure of the battery cell group more compact on the basis of fixing the battery cell group, and also eliminates the cable tie and the insulation structure between the cable tie and the battery cell group.

[0037] Specifically, as Figure 2 shown, the battery module includes a box body 100, a fixing plate 200, and a battery cell group 300. Among them, the box body 100 is provided with a receiving groove 110. The receiving groove 110 has a first side wall 111. The fixing plate 200 is connected to the bottom of the receiving groove 110. The fixing plate 200 and the first side wall 111 are spaced apart along a first direction D1. The battery cell group 300 includes a plurality of battery cells 310 arranged in sequence along the first direction D1. The plurality of battery cells 310 are all arranged in the receiving groove 110, and the plurality of battery cells 310 are clamped between the fixing plate 200 and the first side wall 111.

[0038] Based on the above design, the fixing plate 200 and the first side wall 111 of the receiving groove 110 are spaced apart along the first direction D1, and the fixing plate 200 is connected to the bottom of the receiving groove 110. The plurality of battery cells 310 of the battery cell group 300 are arranged in sequence along the first direction D1, and the plurality of battery cells 310 are clamped between the fixing plate 200 and the first side wall 111. Thus, the fixing of the battery cell group 300 is achieved under the clamping cooperation of the fixing plate 200 and the first side wall 111. Compared with the structure of tying the battery cell group 300 with a cable tie, this way of clamping and fixing the battery cell group 300 can reduce the gap between the battery cells 310, and further make the overall structure of the battery cell group 300 more compact, having the effect of reducing the overall volume of the battery module; in addition, this way of clamping and fixing the battery cell group 300 eliminates the cable tie and the insulation structure between the cable tie and the battery cell group 300 (the insulating sleeve sleeved on the cable tie and / or the insulating pad clamped between the cable tie and the battery cell 310), achieving the effect of reducing production materials.

[0039] Optionally, the fixing plate 200 is detachably connected to the bottom of the receiving groove 110. When assembling the battery module, the battery cell group 300 can be first inserted into the receiving groove 110, and then the fixing plate 200 and the box body 100 can be assembled. When it is necessary to disassemble the battery cell 310, the fixing plate 200 can also be first disassembled, and then the battery cell 310 can be disassembled. It can be seen that the design of the detachable connection between the fixing plate 200 and the bottom of the receiving groove 110 is beneficial to simplify the assembly and disassembly difficulty of the battery module.

[0040] Optionally, as Figure 2 shown, the receiving groove 110 further has a second side wall, the second side wall is disposed opposite to the first side wall 111 along the first direction D1, and an opening 112 is provided on the second side wall. The fixing plate 200 is blocked at the opening 112 to expand the distance between the fixing plate 200 and the first side wall 111 as much as possible, and the number of battery cells 310 in the battery cell group 300.

[0041] Furthermore, as Figure 2 shown, both side edges opposite to the opening 112 are connected to the fixing plate 200. That is to say, in this embodiment, while the fixing plate 200 is connected to the bottom of the receiving groove 110, it is also connected to both side edges opposite to the opening 112. This structural design can improve the reliability and stability of the connection between the fixing plate 200 and the box body 100, and further improve the reliability and stability of the fixing plate 200 and the first side wall 111 to cooperate to clamp the battery cell group 300.

[0042] Even further, as Figure 2 shown, the battery module further includes at least two second connectors 520. Both side edges opposite to the opening 112 respectively correspond to at least one second connector 520. The second connector 520 is provided with a second external thread, and the edge of the opening 112 is provided with a second threaded hole 113. The second connector 520 passes through the fixing plate 200, and the second external thread is in threaded cooperation with the second threaded hole 113. This structural design makes the connection mode between the fixing plate 200 and the edge of the opening 112 relatively simple and convenient for disassembly and assembly.

[0043] In this embodiment, both the second connecting member 520 and the second threaded holes 113 are provided with eight and correspond to each other one by one. Four second threaded holes 113 are respectively provided on both side edges opposite to the opening 112. On the same side of the opening 112, the four second threaded holes 113 are arranged at intervals along the depth direction of the receiving groove 110. This structural design can improve the uniformity of the connection between the fixing plate 200 and both sides of the opening 112. Of course, in other implementation schemes, the second connecting member 520 and the second threaded holes 113 can also be two, five, ten, etc. The number of the second threaded holes 113 provided on both side edges opposite to the opening 112 can be the same or different. On the same side of the opening 112, the multiple second threaded holes 113 can also be in other distribution manners, which can be determined according to the actual production situation and will not be listed one by one here.

[0044] Furthermore, the fixing plate 200 is provided with third threaded holes. The number of the third threaded holes is equal to and corresponds to the number of the second connecting members 520 one by one. Both the third threaded holes and the second threaded holes 113 are in threaded fit with the second external thread. This structural design can improve the reliability of the connection between the fixing plate 200 and the edge of the opening 112.

[0045] Even further, the second connecting member 520 is an M8 short bolt. Of course, in other implementation schemes, the second connecting member 520 can also be other connecting members such as screws and will not be listed one by one here.

[0046] It can be understood that, in other implementation schemes, the edge of the fixing plate 200 and the opening 112 can also be connected through a slot and snap structure or a jack and pin structure, etc.

[0047] Optionally, as Figure 2 shown, a connecting plate 400 is provided at the bottom of the receiving groove 110. The fixing plate 200 is connected to the bottom of the receiving groove 110 through the connecting plate 400, thereby avoiding the problem of reducing the structural strength of the bottom of the receiving groove 110 due to the arrangement of the connecting structure at the bottom of the receiving groove 110, and further ensuring the supporting ability of the bottom of the receiving groove 110 for the battery cell group 300.

[0048] Furthermore, as Figure 2 shown, the battery module further includes a first connecting member 510. The first connecting member 510 is provided with a first external thread. The connecting plate 400 is provided with a first threaded hole 410. The first connecting member 510 passes through the fixing plate 200, and the first external thread is in threaded fit with the first threaded hole 410 to realize the detachable connection between the fixing plate 200 and the connecting plate 400. This structural design is simple in structure and convenient for disassembly and assembly, which is beneficial to reducing the assembly and disassembly difficulty of the battery module and has the effect of improving the production efficiency.

[0049] Optionally, the fixing plate 200 is provided with a fourth threaded hole, and both the fourth threaded hole and the first threaded hole 410 are in threaded fit with the first external thread. This structural design can improve the connection reliability between the fixing plate 200 and the connecting plate 400.

[0050] Optionally, as Figure 2 shown, both the first threaded hole 410 and the first connecting member 510 are provided with four and correspond one by one. The four first threaded holes 410 are arranged at intervals along the extending direction of the connecting plate 400 to improve the connection reliability and stability between the fixing plate 200 and the connecting plate 400. Of course, in other embodiments, the first threaded hole 410 can also be one, two, five, etc., depending on the actual size of the connecting plate 400.

[0051] Optionally, the first connecting member 510 is an M8 long bolt. Of course, in other embodiments, the first connecting member 510 can also be other connecting members such as screws, and will not be listed one by one here.

[0052] It can be understood that in other embodiments, the fixing plate 200 and the connecting plate 400 can also be connected by a slot and snap structure or an insertion hole and pin structure, etc.

[0053] Optionally, as Figure 2 shown, a relief groove 210 is provided on one side of the fixing plate 200 facing the bottom of the receiving groove 110. The connecting plate 400 is located in the relief groove 210 to achieve relief for the connecting plate 400. Further, the bottom of the relief groove 210 is in contact with one side of the connecting plate 400 facing away from the bottom of the receiving groove 110, and the inner walls of the relief groove 210 are respectively in contact with one of the corresponding two side walls of the connecting plate 400 to improve the connection stability between the fixing plate 200 and the connecting plate 400. Moreover, when assembling the fixing plate 200 and the connecting plate 400, this structural design is beneficial to quickly and accurately position the fixing plate 200, and has the effects of improving production efficiency and assembly accuracy.

[0054] Further, the relief groove 210 is a through groove, which is convenient for adjusting the position of the fixing plate 200 when assembling the fixing plate 200 and the connecting plate 400.

[0055] In the prior art, each battery cell group 300 often needs to be fixed with two cable ties. When the battery module includes more than two battery cell groups 300, more than four cable ties and corresponding insulating structures (insulating sleeves sleeved on the cable ties and / or insulating pads clamped between the cable ties and the battery cells 310) need to be configured. In this embodiment, as Figure 2As shown, the number of battery cell groups 300 is more than two. Exemplarily, the number of battery cell groups 300 can be two, three, four, etc. More than two battery cell groups 300 are arranged in the receiving groove 110 along the second direction D2, and the second direction D2 is perpendicular to the first direction D1. It can be seen that in the technical solution provided in this embodiment, under the combined action of the fixing plate 200 and the first side wall 111, more than two battery cell groups 300 can be clamped and fixed. When the number of battery cell groups 300 increases, the number of clamping structures (the fixing plate 200 and the first side wall 111) for fixing the battery cell groups 300 does not increase. For a battery module with a large rated capacity, the technical solution provided in this embodiment is beneficial to reducing production costs.

[0056] As Figure 2 shown, in this embodiment, the first direction D1 is the length direction of the box body 100, and the second direction D2 is the width direction of the box body 100. Of course, in other implementation schemes, it can also be that the first direction D1 is the length direction of the box body 100, and the second direction D2 is the height direction of the box body 100; or, the first direction D1 is the width direction of the box body 100, and the second direction D2 is the length direction of the box body 100, etc.

[0057] In this embodiment, the box body 100 is formed by splicing and welding sheet metal. Of course, in other implementation schemes, the box body 100 can also be made by processes such as injection molding or stamping.

[0058] For the battery module provided in this embodiment, the battery cell group 300 can be clamped and fixed by matching the fixing plate 200 with the first side wall 111 of the receiving groove 110. On the one hand, it can save cable ties and corresponding insulating structures, achieving the effect of saving production materials. On the other hand, it can make the overall structure of the battery cell group 300 more compact, achieving the effect of reducing the overall volume of the battery module. The fixing plate 200 and the connecting plate 400 are detachably connected through the first connecting member 510. At the same time, the fixing plate 200 and the edge of the second side wall opening 112 are detachably connected through the second connecting member 520. While ensuring the reliability and stability of the connection between the fixing plate 200 and the box body 100, it also simplifies the connection structure between the fixing plate 200 and the box body 100, and thus can simplify the disassembly and assembly process of the fixing plate 200. When the battery module needs to be configured with multiple battery cell groups 300, there is no need to increase the structure for fastening the battery cell groups 300. Only the same set of fixing plate 200 and the first side wall 111 can be used to clamp and fix multiple battery cell groups 300, which is beneficial to flexibly controlling the production cost.

[0059] This embodiment also provides a battery pack, which has a high energy density and a low production cost. Specifically, the battery pack includes a battery box and the above-mentioned battery module. The battery module is arranged in the battery box. The battery pack adopts the above-mentioned battery module. The overall volume of the battery module is small, and the input of production materials can be reduced. Therefore, it is beneficial to improve the energy density of the battery pack and reduce the production cost of the battery pack.

[0060] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A battery module, characterized in that: include: A box body (100), wherein the box body (100) is provided with a receiving groove (110), and the receiving groove (110) has a first side wall (111); a fixing plate (200), the fixing plate (200) being connected to the bottom of the containing groove (110), the fixing plate (200) and the first side wall (111) being arranged at intervals along a first direction (D1); A battery cell group (300), the battery cell group (300) comprising a plurality of battery cells (310) arranged in sequence along the first direction (D1), the plurality of battery cells (310) being arranged in the receiving groove (110), and the plurality of battery cells (310) being clamped between the fixing plate (200) and the first side wall (111).

2. The battery module according to claim 1, characterized in that: A connecting plate (400) is provided at the bottom of the containing groove (110), and the fixing plate (200) is connected to the bottom of the containing groove (110) via the connecting plate (400).

3. The battery module according to claim 2, characterized in that: The battery module also includes a first connecting member (510), the first connecting member (510) is provided with a first external thread, the connecting plate (400) is provided with a first threaded hole (410), the first connecting member (510) is passed through the fixing plate (200), and the first external thread is threadedly matched with the first threaded hole (410).

4. The battery module according to claim 2, characterized in that: A avoiding groove (210) is provided on one side of the fixing plate (200) facing the bottom of the accommodating groove (110), and the connecting plate (400) is located in the avoiding groove (210).

5. The battery module according to any one of claims 1 to 4, characterized in that: The fixing plate (200) is detachably connected to the bottom of the accommodating groove (110).

6. The battery module according to any one of claims 1 to 4, characterized in that: The accommodating groove (110) further comprises a second side wall, the second side wall and the first side wall (111) are arranged opposite to each other along the first direction (D1), an opening (112) is provided on the second side wall, and the fixing plate (200) is blocked at the opening (112).

7. The battery module according to claim 6, characterized in that: The opposite side edges of the opening (112) are both connected to the fixing plate (200).

8. The battery module according to claim 6, characterized in that: The battery module also includes at least two second connecting members (520), and the opposite side edges of the opening (112) correspond to at least one of the second connecting members (520), the second connecting member (520) is provided with a second external thread, and the edge of the opening (112) is provided with a second threaded hole (113), the second connecting member (520) is passed through the fixing plate (200), and the second external thread is threadedly matched with the second threaded hole (113).

9. The battery module according to any one of claims 1 to 4, characterized in that: The number of the battery cell groups (300) is more than two, and the more than two battery cell groups (300) are arranged in the containing groove (110) along a second direction (D2), and the second direction (D2) is perpendicular to the first direction (D1).

10. A battery pack, characterized in that: It comprises a battery box and the battery module according to any one of claims 1 to 9, wherein the battery module is arranged in the battery box.

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