Battery module and battery pack comprising same

Abstract

The utility model discloses a battery module and a battery pack comprising the same. The battery module comprises at least two module units which are stacked in sequence, each module unit comprises a battery cell, a first support and a second support, the first support and the second support are oppositely arranged, the battery cell is arranged between the first support and the second support, a first groove is formed in the peripheral side of the first support, and a second groove is formed in the peripheral side of the second support; in every two adjacent module units, the first support of one module unit is detachably connected with the second support of the other module unit. The electric connecting pieces are electrically connected with the two adjacent module units respectively, and the electric connecting pieces are located in the first grooves and the second grooves. Therefore, the plurality of module units can be modularly mounted, and the electric connecting pieces for electrically connecting the two adjacent module units are hidden in the first grooves and the second grooves, so that the problem of short circuit or collision caused by contact between the electric connecting pieces and other external parts can be avoided, and the modularly mounted battery module can be safer.

Description

Technical Field

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

[0002] A modularly installed battery module generally includes a plurality of detachably connected module units and an electrical connector that electrically connects two adjacent module units; however, in the prior art, the electrical connector is prone to contact with other components and cause short circuits or collisions, resulting in poor safety performance. Utility Model Content

[0003] In order to overcome at least one of the defects of the prior art described above, the utility model provides a battery module and a battery pack including the battery module, aiming to solve the problem that the electrical connector is easy to contact with other components and cause short circuit or collision.

[0004] The technical solution adopted by the utility model to solve the problem is:

[0005] The utility model discloses a battery module, comprising: at least two module units stacked in sequence; each of the module units comprises a battery cell and a first bracket and a second bracket arranged opposite to each other, the battery cell is arranged between the first bracket and the second bracket, a first groove is arranged on the outer peripheral side of the first bracket, and a second groove is arranged on the outer peripheral side of the second bracket; in two adjacent module units, the first bracket of one module unit and the second bracket of the other module unit are detachably connected; and an electrical connector is electrically connected to the two adjacent module units, respectively, and the electrical connector is located in the first groove and the second groove.

[0006] According to some embodiments of the utility model, the module unit has a positive connection end and a negative connection end, the positive connection end is located in the first groove, and the negative connection end is located in the second groove; in two adjacent module units, the electrical connector is electrically connected to the positive connection end of one of the module units, and is electrically connected to the negative connection end of the other module unit.

[0007] According to some embodiments of the utility model, the electrical connector includes a connecting plate and a bending portion, the bending portion is connected to the side of the connecting plate, and an angle is formed between the bending portion and the connecting plate; the connecting plate is located in the first groove and the second groove; in two adjacent module units, the connecting plate is electrically connected to the positive electrode connection end of one of the module units, and is electrically connected to the negative electrode connection end of the other module unit; the bending portion is clamped to the end of the first groove and / or the end of the second groove.

[0008] According to some embodiments of the utility model, a first connecting hole and a second connecting hole are provided on the connecting plate, a positive connecting hole corresponding to the first connecting hole is provided at the positive connecting end, and a negative connecting hole corresponding to the second connecting hole is provided at the negative connecting end; the battery module also includes a first bolt and a second bolt, the first bolt is inserted in the first connecting hole and the positive connecting hole, and the second bolt is inserted in the second connecting hole and the negative connecting hole.

[0009] According to some embodiments of the present invention, a rounded corner structure or a chamfered corner structure is provided at an edge of the first groove and an edge of the second groove.

[0010] According to some embodiments of the utility model, the battery module further includes a long-rod bolt and a fixing nut, the long-rod bolt being inserted into the first bracket and the second bracket, and the fixing nut being connected to the end of the long-rod bolt.

[0011] According to some embodiments of the present invention, the battery module further includes an insulating plate; in two adjacent module units, the insulating plate is arranged between the first bracket of one module unit and the second bracket of the other module unit.

[0012] According to some embodiments of the present invention, the battery module also includes a first end plate and a second end plate, the module unit is clamped between the first end plate and the second end plate, the first end plate is connected to the outermost first bracket, and the second end plate is connected to the outermost second bracket.

[0013] According to some embodiments of the present invention, the electrical connector is a copper busbar or an aluminum busbar.

[0014] In addition, the utility model also provides a battery pack, comprising the battery module as described above.

[0015] In summary, the battery module and the battery pack including the battery module provided by the present invention have at least the following technical effects:

[0016] Several module units can be installed modularly. In this way, the number of module units can be increased or decreased according to actual needs to achieve changes in the voltage and capacity of the entire battery module; and the electrical connector that electrically connects two adjacent module units is hidden in the first groove and the second groove, which can avoid the electrical connector from contacting other external components and causing short circuits or bumps, thereby making the modularly installed battery module safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a battery module according to an embodiment of the utility model;

[0018] Figure 2 for Figure 1 A partial enlarged view of the middle A part;

[0019] Figure 3 This is a schematic diagram of the exploded structure of a battery module according to an embodiment of the utility model;

[0020] Figure 4 It is a schematic structural diagram of an electrical connector according to an embodiment of the utility model.

[0021] The meanings of the reference numerals are as follows:

[0022] 1. Module unit; 11. First bracket; 111. First groove; 12. Second bracket; 121. Second groove; 13. Battery cell; 14. Positive electrode connection terminal; 141. Positive electrode connection hole; 15. Negative electrode connection terminal; 151. Negative electrode connection hole; 2. Electrical connector; 21. Connecting plate; 211. First connection hole; 212. Second connection hole; 22. Bending portion; 3. First bolt; 4. Second bolt; 5. Long rod bolt; 6. Fixing nut; 7. Insulating plate; 8. First end plate; 81. Lifting hole; 82. Positioning hole; 83. Mounting hole; 9. Second end plate. DETAILED DESCRIPTION

[0023] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicate directions or positional relationships based on the directions or positional relationships described in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0026] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0027] See also Figures 1 to 4The present embodiment discloses a battery module, which includes an electrical connector 2 and at least two module units 1 stacked in sequence; each module unit 1 includes a battery cell 13 and a first bracket 11 and a second bracket 12 arranged opposite to each other, the battery cell 13 is arranged between the first bracket 11 and the second bracket 12, the outer peripheral side of the first bracket 11 is provided with a first groove 111, and the outer peripheral side of the second bracket 12 is provided with a second groove 121; in two adjacent module units 1, the first bracket 11 of one module unit 1 and the second bracket 12 of the other module unit 1 are detachably connected; the electrical connector 2 is electrically connected to the two adjacent module units 1 respectively, and the electrical connector 2 is located in the first groove 111 and the second groove 121.

[0028] In a battery module provided in this embodiment, several module units 1 can be modularly installed with each other. In this way, the number of module units 1 can be increased or decreased according to actual needs to achieve changes in the voltage and capacity of the entire battery module; and the electrical connector 2 that electrically connects two adjacent module units 1 is hidden in the first groove 111 and the second groove 121, which can avoid the electrical connector 2 from contacting other external components and causing short circuits or bumps, thereby making the modularly installed battery module safer.

[0029] It can be understood that in the embodiment, when a battery module fails and needs to be troubleshooted and analyzed, the faulty module unit 1 can be first detected, and then the battery cell 13 of the faulty module unit 1 can be detected, thereby greatly reducing the troubleshooting time, and only the faulty module unit 1 needs to be replaced, and the remaining module units 1 with normal functions can continue to be used, thereby achieving the purpose of cost saving.

[0030] like Figure 1 and Figure 3 As shown, specifically, in this embodiment, three module units 1 are provided; of course, in some other embodiments, the module units 1 may also be provided with but limited to 4 or 5 or 6 or 7, etc., which can be selected according to actual needs, and no sole limitation is made here.

[0031] Specifically, in this embodiment, each module unit 1 includes a plurality of battery cells 13 connected in series and in parallel.

[0032] like Figure 1 and Figure 2As shown, specifically, in this embodiment, the module unit 1 has a positive electrode connection terminal 14 and a negative electrode connection terminal 15, the positive electrode connection terminal 14 is located in the first groove 111, and the negative electrode connection terminal 15 is located in the second groove 121; in two adjacent module units 1, the electrical connector 2 is electrically connected to the positive electrode connection terminal 14 of one module unit 1, and is electrically connected to the negative electrode connection terminal 15 of the other module unit 1; in this way, the positive and negative electrodes between the two adjacent module units 1 are connected end to end, which can make the length of the electrical connector 2 shorter. The shorter the length of the electrical connector 2, the lower its impedance and the stronger its current carrying capacity.

[0033] like Figure 2 and Figure 4 As shown, preferably, in this embodiment, each electrical connector 2 includes a connecting plate 21 and two bending portions 22, the two bending portions 22 are respectively connected to the two side portions of the connecting plate 21, an angle is formed between the bending portions 22 and the connecting plate 21, and the connecting plate 21 is located in the first groove 111 and the second groove 121; in two adjacent module units 1, the connecting plate 21 is electrically connected to the positive electrode connecting terminal 14 of one module unit 1, and is electrically connected to the negative electrode connecting terminal 15 of the other module unit 1; more preferably, in order to improve the installation stability of the electrical connector 2 in the first groove 111 and the second groove 121, one of the bending portions 22 is clamped at the end of the first groove 111, and the other bending portion 22 is clamped at the end of the second groove 121.

[0034] It should be noted that, in some other embodiments, each electrical connector 2 may also include only one bending portion 22 , and the bending portion 22 may only be snapped onto the end of the first groove 111 or the end of the second groove 121 , depending on actual needs.

[0035] like Figure 2 and Figure 4 As shown, specifically, in this embodiment, a first connection hole 211 and a second connection hole 212 are provided on the connection plate 21, a positive connection hole 141 corresponding to the first connection hole 211 is provided at the positive connection terminal 14, and a negative connection hole 151 corresponding to the second connection hole 212 is provided at the negative connection terminal 15; the battery module also includes a first bolt 3 and a second bolt 4, the first bolt 3 is inserted in the first connection hole 211 and the positive connection hole 141, and the second bolt 4 is inserted in the second connection hole 212 and the negative connection hole 151, so as to realize the electrical connection between the connection plate 21 and the two adjacent module units 1, with a simple structure and low production cost.

[0036] Preferably, in this embodiment, in order to prevent the edges of the first groove 111 and the second groove 121 from scratching the electrical connector 2 and to prevent stress concentration from occurring at the edges of the first groove 111 and the second groove 121 , rounded corners are provided at the edges of the first groove 111 and the second groove 121 .

[0037] It should be noted that, in some other embodiments, the edges of both the first groove 111 and the second groove 121 may also be provided with chamfered structures, which can be selected according to actual needs and is not limited here.

[0038] like Figure 3 As shown, preferably, in this embodiment, in order to realize the modular installation of several module units 1, the battery module also includes a long rod bolt 5 and a fixing nut 6, the long rod bolt 5 is inserted in the first bracket 11 and the second bracket 12, and the fixing nut 6 is connected to the end of the long rod bolt 5 to fix the relative positions of the multiple module units 1. In this way, the long rod bolt 5 can be inserted in the first bracket 11 and the second bracket 12 of the multiple module units 1 to realize the detachable connection between the first bracket 11 and the second bracket 12 of two adjacent module units 1, which has a simple structure, easy function realization and low production cost.

[0039] like Figure 3 As shown, more preferably, in this embodiment, in order to improve the assembly stability between the multiple module units 1, a plurality of long rod bolts 5 are provided, and the plurality of long rod bolts 5 are arranged in parallel and inserted at intervals in the first bracket 11 and the second bracket 12 of the multiple module units 1.

[0040] It can be understood that in this embodiment, when one of the module units 1 needs to be removed, the fixing nut 6 needs to be unscrewed, and then the module unit 1 can be moved out along the long rod bolt 5, so the disassembly and assembly is simple and convenient.

[0041] like Figure 3 As shown, preferably, in this embodiment, in order to avoid short circuit, the battery module further includes an insulating plate 7 , and in two adjacent module units 1 , an insulating plate 7 is provided between the first bracket 11 of one module unit 1 and the second bracket 12 of the other module unit 1 .

[0042] like Figure 3 As shown, specifically, in this embodiment, the battery module further includes a first end plate 8 and a second end plate 9, the module unit 1 is sandwiched between the first end plate 8 and the second end plate 9, the first end plate 8 is connected to the outermost first bracket 11, and the second end plate 9 is connected to the outermost second bracket 12. Preferably, in this embodiment, in order to avoid short circuit, an insulating plate 7 is provided between the first end plate 8 and the outermost first bracket 11, and an insulating plate 7 is provided between the second end plate 9 and the outermost second bracket 12.

[0043] like Figure 3As shown, preferably, in this embodiment, a lifting hole 81, a positioning hole 82 and a mounting hole 83 are provided on the first end plate 8. The lifting hole 81 is used for connection of lifting equipment to realize lifting of the battery module during transportation. The positioning hole 82 is used to observe and detect whether the installation position of the battery module in the shell of the battery pack meets the requirements. The mounting hole 83 is used to fix the battery module in the shell of the battery pack.

[0044] In addition, this embodiment also provides a battery pack, including the battery module as described above, and also including a shell, in which the battery module is installed. The battery pack has all the advantages of the above-mentioned battery module, which will not be repeated here.

[0045] Preferably, in this embodiment, the battery module is arranged horizontally in the battery pack as a whole, which is helpful to reduce the Z-direction height of the battery pack.

[0046] In summary, the battery module and the battery pack including the battery module disclosed in the utility model can at least bring the following beneficial technical effects:

[0047] 1) Several module units 1 can be installed modularly, and the number of module units 1 can be increased or decreased according to actual needs to achieve changes in the voltage and capacity of the entire battery module;

[0048] 2) The electrical connector 2 electrically connecting two adjacent module units 1 is hidden in the first groove 111 and the second groove 121, so as to avoid the problem of short circuit or collision caused by contact between the electrical connector 2 and other external components, thereby making the modularly installed battery module safer;

[0049] 3) The positive and negative electrodes of two adjacent module units 1 are connected end to end, so that the length of the electrical connector 2 can be shorter. The shorter the length of the electrical connector 2, the lower its impedance and the stronger its current capacity;

[0050] 4) One of the bent portions 22 is clamped to the end of the first groove 111 , and the other bent portion 22 is clamped to the end of the second groove 121 , which can improve the installation stability of the electrical connector 2 .

[0051] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A battery module, characterized in that: include: At least two module units (1) stacked in sequence; each of the module units (1) comprises a battery cell (13) and a first bracket (11) and a second bracket (12) arranged opposite to each other, the battery cell (13) being arranged between the first bracket (11) and the second bracket (12); a first groove (111) is arranged on the outer peripheral side of the first bracket (11), and a second groove (121) is arranged on the outer peripheral side of the second bracket (12); in two adjacent module units (1), the first bracket (11) of one module unit (1) and the second bracket (12) of the other module unit (1) are detachably connected; The electrical connector (2) is electrically connected to two adjacent module units (1) respectively, and the electrical connector (2) is located in the first groove (111) and the second groove (121).

2. The battery module according to claim 1, characterized in that: The module unit (1) has a positive electrode connection terminal (14) and a negative electrode connection terminal (15), wherein the positive electrode connection terminal (14) is located in the first groove (111), and the negative electrode connection terminal (15) is located in the second groove (121); in two adjacent module units (1), the electrical connector (2) is electrically connected to the positive electrode connection terminal (14) of one of the module units (1), and is electrically connected to the negative electrode connection terminal (15) of the other module unit (1).

3. The battery module according to claim 2, characterized in that: The electrical connector (2) comprises a connecting plate (21) and a bent portion (22), wherein the bent portion (22) is connected to a side portion of the connecting plate (21), and an angle is formed between the bent portion (22) and the connecting plate (21); The connecting plate (21) is located in the first groove (111) and the second groove (121); in two adjacent module units (1), the connecting plate (21) is electrically connected to the positive electrode connecting end (14) of one of the module units (1), and is electrically connected to the negative electrode connecting end (15) of the other module unit (1); The bent portion (22) is clamped to an end of the first groove (111) and / or an end of the second groove (121).

4. The battery module according to claim 3, characterized in that: The connecting plate (21) is provided with a first connecting hole (211) and a second connecting hole (212); the positive connecting terminal (14) is provided with a positive connecting hole (141) corresponding to the first connecting hole (211); the negative connecting terminal (15) is provided with a negative connecting hole (151) corresponding to the second connecting hole (212); the battery module further comprises a first bolt (3) and a second bolt (4); the first bolt (3) is inserted into the first connecting hole (211) and the positive connecting hole (141); the second bolt (4) is inserted into the second connecting hole (212) and the negative connecting hole (151).

5. The battery module according to claim 1, characterized in that: A rounded corner structure or a chamfered corner structure is provided at the edge of the first groove (111) and the edge of the second groove (121).

6. The battery module according to claim 3, characterized in that: The battery module also includes a long-rod bolt (5) and a fixing nut (6), wherein the long-rod bolt (5) is inserted into the first bracket (11) and the second bracket (12), and the fixing nut (6) is connected to the end of the long-rod bolt (5).

7. The battery module according to claim 4, characterized in that: The battery module further comprises an insulating plate (7); in two adjacent module units (1), the insulating plate (7) is arranged between the first bracket (11) of one module unit (1) and the second bracket (12) of the other module unit (1).

8. The battery module according to claim 5, characterized in that: The battery module further comprises a first end plate (8) and a second end plate (9), the module unit (1) being sandwiched between the first end plate (8) and the second end plate (9), the first end plate (8) being connected to the outermost first bracket (11), and the second end plate (9) being connected to the outermost second bracket (12).

9. The battery module according to claim 1, characterized in that: The electrical connector (2) is a copper busbar or an aluminum busbar.

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

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