Battery module

Abstract

The utility model relates to the technical field of battery equipment, in particular to a battery module. The battery module comprises a battery box body, batteries and a busbar, the busbar is used for connecting a plurality of batteries in series and / or in parallel, the plurality of batteries are accommodated in the battery box body, the busbar comprises a first connecting area, a transition area and a second connecting area which are connected in sequence, and the first connecting area and the second connecting area are both configured to be fixedly connected with a battery pole; the transition area can deform relative to the first connection area and / or the second connection area, any one of the first connection area and the second connection area is provided with a butt joint piece extending in the direction far away from the battery pole and close to the opening of the battery box body, and the butt joint piece can be fixedly connected with charging and discharging equipment and is fixedly connected with the charging and discharging equipment through the butt joint piece; according to the invention, normal charging and discharging of the battery accommodated in the battery box body by the charging and discharging equipment can be realized, the thermal diffusion test efficiency can be improved, and the labor intensity during thermal diffusion test can be reduced.

Description

Technical Field

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

[0002] A plurality of batteries are arranged in the box of the battery module, and the plurality of batteries are connected in series and / or in parallel through a bus bar. In order to ensure the safety of the battery module, a thermal diffusion test is required for the battery module.

[0003] The bus in the prior art is L-shaped. Specifically, one side of the L-shaped bus is used for connecting batteries in series and / or in parallel, and the other side of the L-shaped bus extends horizontally outward and is connected to other busbars or docking equipment. When performing a thermal diffusion test on a battery module, if the battery module is accommodated in a battery case, due to the high energy density requirements of the battery module and the compact internal structure of the battery module, the outer extension of the bus is close to the inner cavity wall of the battery case, which is not convenient for the external charging and discharging equipment to be connected and fixed to the outer extension of the bus. If the external charging and discharging equipment is forcibly connected and fixed to the outer extension of the bus, it is very easy to disconnect again after the connection, which greatly affects the efficiency of the thermal diffusion test. Therefore, it is necessary to remove the multiple batteries assembled together from the battery case to facilitate the docking of the charging and discharging equipment with the bus. After the test is completed, the multiple batteries are put back into the battery case. This requires repeatedly taking out and putting back multiple batteries, which makes the thermal diffusion test method more complicated and reduces the efficiency of the thermal diffusion test. In addition, due to the heavy weight of the batteries, the repeated handling of the batteries is labor-intensive and workers are prone to fatigue.

[0004] Therefore, it is urgent to invent a battery module to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a battery module to realize normal charging and discharging of batteries contained in a battery box by a charging and discharging device, improve the efficiency of thermal diffusion testing, and reduce the labor intensity when performing thermal diffusion testing.

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

[0007] A battery module, comprising a battery box, a battery and a bus, wherein a plurality of the batteries are accommodated in the battery box, the bus is used to connect the plurality of the batteries in series and / or in parallel, and the bus comprises a first connection area, a transition area and a second connection area sequentially connected along a preset direction;

[0008] The first connection area and the second connection area are both configured to be connected and fixed to a battery pole, and the transition area can be deformed relative to the first connection area and / or the second connection area;

[0009] A docking piece extending away from the battery and close to the opening of the battery box is provided on any one of the first connection area and the second connection area, and the docking piece can be connected and fixed to the charging and discharging equipment.

[0010] As an optional solution, the extension distance H1 of the docking piece is ≥14±0.5 mm.

[0011] As an optional solution, a first positioning welding hole is provided on the first connection area, and a second positioning welding hole is provided on the second connection area. The first positioning welding hole and the second positioning welding hole are respectively welded and fixed to the battery pole.

[0012] As an optional solution, the shortest distance B between the butt joint and the first positioning welding hole is ≥6.5 mm; or the shortest distance B between the butt joint and the second positioning welding hole is ≥6.5 mm.

[0013] As an optional solution, the first positioning welding hole includes:

[0014] a first positioning cavity, the aperture of which is adapted to the diameter of the battery pole, and the first positioning cavity is used to accommodate and position the battery pole; and

[0015] The first welding cavity is coaxially connected to the first positioning cavity, the first welding cavity is arranged at an end of the first positioning cavity away from the battery, the aperture of the first welding cavity is larger than the aperture of the first positioning cavity, and the first welding cavity is configured to be welded and fixed to the battery pole.

[0016] As an optional solution, a receiving groove is provided on any one of the first connection area and the second connection area, and the receiving groove is used to receive a temperature measuring component, and the temperature measuring component is used to measure the temperature of the bus.

[0017] As an optional solution, the transition zone includes:

[0018] A straight portion, on which a data detection member is detachably fixed, and the data detection member is used to detect the voltage and / or current of the bus bar;

[0019] The bending portion is connected to both ends of the straight portion along the preset direction, the bending portion is connected to the first connecting area or the second connecting area, and the bending portion can be flattened or bent relative to the straight portion.

[0020] As an optional solution, the extension distance of the straight portion along the preset direction is L1, the extension distance of the bent portion along the preset direction is L2, and L1 / L2=3 / 1.

[0021] As an optional solution, the bent portion is bent relative to the first connection area and the second connection area in a direction away from the battery, and the vertical distance between the end surface of the straight portion away from the battery and the end surface of the first connection area and / or the second connection area away from the battery is H2, H2 = 4mm~6mm.

[0022] As an optional solution, the busbar further includes:

[0023] A fixing member, a fixing through hole is provided on the straight portion, a through hole is provided on the data detection member for detecting the current and / or voltage of the bus, and the fixing member is penetrated and fixed in the fixing through hole and the through hole.

[0024] Beneficial effects of the utility model:

[0025] The battery module provided by the utility model accommodates multiple batteries in a battery box, and uses a bus bar to connect the multiple batteries in series and / or in parallel, thereby realizing the integrated bus bar of the multiple batteries; by splitting the bus bar into a first connection area, a transition area and a second connection area which are sequentially connected along a preset direction, the first connection area and the second connection area are respectively connected and fixed to the battery pole, thereby realizing the series connection or parallel connection of the two batteries; by arranging a transition area between the first connection area and the second connection area, the transition area can be deformed relative to the first connector and / or the second connection area, thereby ensuring the fixing effect of the first connection area and the second connection area to the battery pole; by arranging a docking piece extending in a direction away from the battery and close to the opening of the battery box on any one of the first connection area and the second connection area, the docking piece is used to connect and fix with a charging and discharging device, so that when performing a thermal diffusion test, the charging and discharging device can realize normal charging and discharging of the battery accommodated in the battery box, without taking the battery out of the battery box accommodating the battery, thereby not only improving the efficiency of the thermal diffusion test, but also reducing the labor intensity of performing the thermal diffusion test. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an axonometric diagram of a busbar in a battery module provided by an embodiment of the utility model;

[0027] Figure 2 is a top view of a busbar in a battery module provided by an embodiment of the utility model;

[0028] Figure 3 It is a side view of a bus bar in a battery module provided in an embodiment of the utility model.

[0029] In the figure:

[0030] 100. Bus;

[0031] 110, first connection area; 111, docking piece; 112, first positioning welding hole; 1121, first positioning cavity; 1122, first welding cavity; 120, second connection area; 121, second positioning welding hole; 1211, second positioning cavity; 1212, second welding cavity; 122, accommodating groove; 130, transition area; 131, straight portion; 1311, fixing through hole; 132, bending portion. DETAILED DESCRIPTION

[0032] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0036] The busbar in the prior art is L-shaped. Specifically, one side of the L-shaped busbar is used for connecting batteries in series and / or in parallel, and the other side of the L-shaped busbar extends horizontally outward and is connected to other busbars or docking equipment. When the battery module is subjected to a thermal diffusion test, due to the high energy density requirements of the battery module, the internal structure of the battery module is compact, and the distance between the extension of the busbar and the inner cavity wall of the battery box is relatively close, which is not convenient for the external charging and discharging equipment to be connected and fixed to the extension of the busbar. If the external charging and discharging equipment is forcibly connected and fixed to the extension of the busbar, it is very easy to disconnect again after the connection, which greatly affects the efficiency of the thermal diffusion test. Therefore, it is necessary to remove the multiple batteries assembled together from the battery box to facilitate the docking of the charging and discharging equipment with the busbar. After the test is completed, the multiple batteries are put back into the battery box. This requires repeated removal and return of multiple batteries, resulting in a relatively cumbersome thermal diffusion test method, which reduces the efficiency of the thermal diffusion test, and because the battery is heavy, the labor intensity of repeatedly carrying the battery is high, and the staff is easily fatigued.

[0037] In order to solve the above problems, this embodiment provides a battery module. The battery module includes a battery box, a battery and a busbar 100, wherein a plurality of batteries are accommodated in the battery box, and the busbar 100 is used to connect the plurality of batteries in series and / or in parallel. Figure 1 to Figure 3 As shown, the busbar 100 includes a first connection area 110, a transition area 130 and a second connection area 120 which are connected in sequence along a preset direction. The first connection area 110 and the second connection area 120 are both configured to be connected and fixed to the battery pole. The transition area 130 can be deformed relative to the first connection area 110 and / or the second connection area 120. Any one of the first connection area 110 and the second connection area 120 is provided with a docking piece 111 extending in a direction away from the battery and close to the opening of the battery case, and the docking piece 111 can be connected and fixed to the charging and discharging equipment.

[0038] The battery module realizes the integrated busbar of multiple batteries by accommodating multiple batteries in a battery box and connecting the multiple batteries in series and / or in parallel using a busbar 100; the busbar 100 is split into a first connection area 110, a transition area 130 and a second connection area 120 which are sequentially connected along a preset direction, and the first connection area 110 and the second connection area 120 are respectively connected and fixed to the battery poles to realize the series connection or parallel connection of two batteries; the transition area 130 is set between the first connection area 110 and the second connection area 120 so that the transition area 120 can be deformed relative to the first connection area 110 and / or the second connection area 130, which can ensure that the first connection area 110 and the second connection area 120 are connected in series or in parallel. The fixing effect of 120 and the battery pole is improved by arranging a docking piece 111 extending in a direction away from the battery and close to the opening of the battery case on any one of the first connection area 110 and the second connection area 120, and connecting and fixing with the charging and discharging equipment by using the docking piece 111. When performing a thermal diffusion test, since the docking piece 111 extends in a direction away from the battery and close to the opening of the battery case, it is ensured that the position of the docking piece 111 can provide a docking space for the charging and discharging equipment, and the charging and discharging equipment can realize normal charging and discharging of the battery accommodated in the battery case, without taking the battery out of the battery case accommodating the battery, which can not only improve the efficiency of the thermal diffusion test, but also reduce the labor intensity of the thermal diffusion test.

[0039] It can be understood that the battery module provided in this embodiment can be a battery module of any structure, as long as it is composed of a battery case and a plurality of batteries connected in series and / or in parallel by the bus 100 disclosed in this embodiment. This embodiment does not specifically limit the specific structure of the battery module.

[0040] It should be noted that, in this embodiment, the docking member 111 is disposed on the first connection area 110. In other embodiments, the docking member 111 may also be disposed on the second connection area 120, which is not specifically limited in this embodiment.

[0041] As an optional solution, an external thread is provided on the outer peripheral wall of the docking piece 111, a threaded hole is provided on the joint of the charging and discharging device, and the joint of the charging and discharging device is threadedly fixed to the docking piece 111. By threading the docking piece 111 and the joint of the charging and discharging device, it is not only convenient to assemble and disassemble the docking piece 111 and the joint of the charging and discharging device, but also to ensure the stable connection between the docking piece 111 and the joint of the charging and discharging device, with a simple structure and ingenious design. It should be noted that in this embodiment, in order to simplify the processing difficulty of the bus 100, the docking piece 111 is a bolt, and the bolt is fixed to the first connection area 110 by riveting. In other embodiments, the thread can also be processed on the straight rod by itself, and then the straight rod is fixed to the first connection area 110 by riveting or welding, which is not specifically limited in this embodiment. Moreover, the diameter Φ of the bolt used in this embodiment is 8 mm. In other embodiments, the specific value of the bolt diameter Φ can also be adjusted according to actual needs, which is not specifically limited in this embodiment.

[0042] In addition, the extension distance H1 of the docking piece 111 is ≥14±0.5mm. Among them, when the extension distance H1 of the docking piece 111 is too small, the connector of the charging and discharging equipment cannot be fully threaded with the docking piece 111, affecting the fixing effect of the docking piece 111 and the connector of the charging and discharging equipment. When the extension distance of the docking piece 111 is too large, the docking piece 111 occupies excessive space, reducing the energy density of the battery module when assembled together. In this embodiment, according to the battery box size and battery size in the actual application scenario, the extension distance H1 of the docking piece 111 is preferably 15mm, and because the bolts have a certain dimensional tolerance, a tolerance of ±0.5mm is provided for the dimensional tolerance of the bolts themselves. In other embodiments, the extension distance H1 of the docking piece 111 can also be adjusted according to actual needs. It is only necessary to ensure that the extension distance H1 of the docking piece 111 is ≥14±0.5mm, and this embodiment does not make specific limitations.

[0043] In an optional embodiment, a first positioning welding hole 112 is provided on the first connection area 110, and a second positioning welding hole 121 is provided on the second connection area 120. The first positioning welding hole 112 and the second positioning welding hole 121 are respectively welded and fixed to the battery pole. By providing the first positioning welding hole 112 on the first connection area 110, the first connection area 110 can be stably welded and fixed to the battery pole, and by providing the second positioning welding hole 121 on the second connection area 120, the second connection area 120 can be stably welded and fixed to the battery pole, thereby ensuring the busbar 100's busbar effect.

[0044] Specifically, if Figure 1 and Figure 2As shown, the first positioning welding hole 112 includes a first positioning cavity 1121 and a first welding cavity 1122, wherein the aperture of the first positioning cavity 1121 is adapted to the diameter of the battery pole, the first positioning cavity 1121 is used to accommodate and position the battery pole, the first welding cavity 1122 is coaxially connected to the first positioning cavity 1121, the first welding cavity 1122 is arranged at an end of the first positioning cavity 1121 away from the battery, the aperture of the first welding cavity 1122 is larger than the aperture of the first positioning cavity 1121, and the first welding cavity 1122 is configured to be welded and fixed to the battery pole. By splitting the first positioning welding hole 112 into a coaxially conductive first positioning cavity 1121 and a first welding cavity 1122, and setting the first welding cavity 1122 at an end of the first positioning cavity 1121 away from the battery, when the battery pole in the battery is accommodated and positioned in the first positioning cavity 1121, the welding equipment welds and fixes the battery pole accommodated in the first positioning cavity 1121 to the cavity wall of the first welding cavity 1122 through welding material, and because the aperture of the first welding cavity 1122 is larger than the aperture of the first positioning cavity 1121, the welding material can be filled in the first welding cavity 1122, thereby improving the aesthetics of the bus 100 and the battery pole that are welded and fixed together.

[0045] It should be noted that, in this embodiment, the second positioning welding hole 121 includes a coaxially connected second positioning cavity 1211 and a second welding cavity 1212, the specific structure of the second positioning cavity 1211 is the same as the specific structure of the first positioning cavity 1121, and the specific structure of the second welding cavity 1212 is the same as the specific structure of the first welding cavity 1122, which will not be repeated here.

[0046] In this embodiment, in order to ensure the normal welding and fixing of the battery pole and the first connection area 110, the closest distance B between the butt joint 111 and the first welding cavity 1122 is ≥6.5 mm. Since the welding equipment requires a certain welding space when welding, by ensuring that the closest distance B between the butt joint 111 and the first welding cavity 1122 is ≥6.5 mm, sufficient welding space can be provided for the welding equipment to ensure the welding and fixing of the battery pole and the first welding cavity 1122. It should be noted that in other embodiments, the closest distance B between the butt joint 111 and the first welding cavity 1122 can also be adaptively adjusted according to the specific specifications of the welding equipment actually used. It is only necessary to ensure the normal welding operation of the welding equipment, and this embodiment does not make specific limitations.

[0047] As an optional solution, a receiving groove 122 is provided on either the first connection area 110 or the second connection area 120, and the receiving groove 122 is used to receive a temperature measuring element, and the temperature measuring element is used to measure the temperature of the bus 100. By providing the receiving groove 122 on either the first connection area 110 or the second connection area 120, and accommodating the temperature measuring element in the receiving groove 122, the bus 100 and the temperature measuring element can be integrated together, which can not only improve the temperature measurement accuracy of the bus 100 by the temperature measuring element, but also prevent the problem of the temperature measuring element being lost in the subsequent temperature measurement process.

[0048] It should be noted that, in the present embodiment, the docking member 111 is arranged on the first connection area 110, and the receiving groove 122 is arranged on the second connection area 120. The receiving groove 122 and the docking member 111 are not arranged on the first connection area 110 or the second connection area 120 at the same time. The structural arrangement is reasonable and the aesthetics can be improved. In addition, the temperature measuring member in the present embodiment is a temperature sensor, which has a simple structure, sensitive response and high detection accuracy. In other embodiments, the receiving groove 122 and the docking member 111 can also be arranged on the first connection area 110 or the second connection area 120 at the same time, and the temperature measuring member can also be other structures with temperature measurement function, which is not specifically limited in the present embodiment.

[0049] Combination Figure 3 The specific structure of the transition zone 130 is described. The transition zone 130 includes a straight portion 131 and a bent portion 132, wherein the data detection component can be detachably fixed on the straight portion 131, and the data detection component is used to detect the voltage and / or current of the bus 100. The straight portion 131 is connected to the bent portion 132 at both ends along a preset direction, and the bent portion 132 is connected to the first connection area 110 or the second connection area 120. The bent portion 132 can be flattened or bent relative to the straight portion 131. By providing a bending portion 132 at both ends of the straight portion 131 along a preset direction, the bending portion 132 is connected to the first connection area 110 and the second connection area 120 to form the overall structure of the busbar 100, and by ensuring that the bending portion 132 can be flattened or bent relative to the straight portion 131, when the first connection area 110 is welded and fixed to the battery pole, the deformation of the first connection area 110 will drive the bending portion 132 to move relative to the straight portion 131, so as to flatten or bend the bending portion 132, thereby providing a deformation margin for the welding and fixing of the first connection area 110 and the battery pole. When the second connection area 120 is welded and fixed to the battery pole, the deformation of the second connection area 120 will drive the bending portion 132 to move relative to the straight portion 131, so as to flatten or bend the bending portion 132, thereby providing a deformation margin for the welding and fixing of the first connection area 110 and the battery pole.

[0050] It should be noted that, in this embodiment, Figure 3As shown, the preset direction is the left-right direction in the figure, and the first connection area 110, the transition area 130 and the second connection area 120 are sequentially connected along the left-right direction. In other embodiments, the specific orientation of the preset direction can also be adjusted according to actual needs, and this embodiment does not make specific limitations.

[0051] As an optional solution, the bending portion 132 is bent in a direction away from the battery relative to the first connection area 110 and the second connection area 120, and the vertical distance between the end surface of the straight portion 131 away from the battery and the end surface of the first connection area 110 and / or the second connection area 120 away from the battery is H2, H2 = 4mm ~ 6mm. By limiting the vertical distance between the end surface of the straight portion 131 away from the battery and the end surface of the first connection area 110 and / or the second connection area 120 away from the battery, when the bus 100 connects multiple batteries in series and / or in parallel, the size specifications of the multiple batteries connected in parallel can be limited to ensure that the multiple batteries accommodated in the battery box do not interfere with the battery box. It should be noted that in this embodiment, the vertical distance H2 between the end surface of the straight portion 131 away from the battery and the end surface of the first connection area 110 and the second connection area 120 away from the battery is preferably 5mm. In other embodiments, the specific value of H2 can also be adjusted arbitrarily within the range of 4mm to 6mm according to actual needs, and this embodiment does not make specific limitations.

[0052] In an optional embodiment, the extension distance of the straight portion 131 along the left-right direction is L1, and the extension distance of the bent portion 132 along the left-right direction is L2, and L1 / L2=3 / 1. By limiting the distance L1 extending along the left-right direction of the straight portion 131 and the distance L2 extending along the left-right direction of the bent portion 132, combined with the vertical distance H2 between the end surface of the straight portion 131 away from the battery and the end surface of the first connection area 110 and / or the second connection area 120 away from the battery, the maximum deformation margin that the bent portion 132 can provide can be limited. In other embodiments, the specific ratio of L1 / L2 can also be adjusted according to actual needs, and this embodiment does not make a specific limitation.

[0053] In this embodiment, a fixing through hole 1311 is provided on the straight portion 131, and a through hole is provided on the data detection member for detecting the current and / or voltage of the bus 100, and the fixing member is inserted and fixed in the fixing through hole 1311 and the through hole, thereby realizing the detachable installation of the data detection member and the straight portion 131. It should be noted that in this embodiment, the fixing member is a fixing bolt, and the fixing through hole 1311 and the inner cavity wall of the through hole are both provided with internal threads, and the fixing bolt is threadedly fixed to the fixing through hole 1311 and the inner cavity wall of the through hole. In other embodiments, the fixing member may also be a fixing pin, and the fixing pin is plugged and fixed to the fixing through hole 1311 and the through hole, which is not specifically limited in this embodiment.

[0054] When conducting a thermal diffusion test, the data detection piece can be installed on the straight portion 131 using fixing bolts. After completing the thermal diffusion test, the data detection piece can be removed from the straight portion 131 to facilitate the subsequent packaging and transportation of the battery module. Compared with the prior art method of welding and fixing the data detection piece to the bus 100, the detachable fixing method of the data detection piece to the straight portion 131 facilitates the disassembly and assembly of the data acquisition device, further improving the test efficiency of the thermal diffusion test. In addition, the data acquisition device can be detachably fixed on the straight portion 131, which can not only utilize the straight portion 131 to achieve stable bearing of the data acquisition device, but also can make full use of the space on the bus 100, thereby improving the space utilization rate on the bus 100.

[0055] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles 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: Comprising a battery box, a battery and a busbar (100), wherein a plurality of the batteries are accommodated in the battery box, the busbar (100) is used to connect the plurality of the batteries in series and / or in parallel, and the busbar (100) comprises a first connection area (110), a transition area (130) and a second connection area (120) which are sequentially connected along a preset direction; The first connection area (110) and the second connection area (120) are both configured to be connected and fixed to a battery pole, and the transition area (130) is capable of deforming relative to the first connection area (110) and / or the second connection area (120); A docking piece (111) extending away from the battery pole and close to the opening of the battery box is provided on any one of the first connection area (110) and the second connection area (120), and the docking piece (111) can be connected and fixed to a charging and discharging device.

2. The battery module according to claim 1, characterized in that: The extension distance H1 of the docking piece (111) is ≥14±0.5 mm.

3. The battery module according to claim 1, characterized in that: The first connection area (110) is provided with a first positioning welding hole (112), and the second connection area (120) is provided with a second positioning welding hole (121); the first positioning welding hole (112) and the second positioning welding hole (121) are respectively welded and fixed to the battery pole.

4. The battery module according to claim 3, characterized in that: The shortest distance B between the butt joint (111) and the first positioning welding hole (112) is ≥6.5 mm; or the shortest distance B between the butt joint (111) and the second positioning welding hole (121) is ≥6.5 mm.

5. The battery module according to claim 3, characterized in that: The first positioning welding hole (112) comprises: A first positioning cavity (1121), the aperture of the first positioning cavity (1121) being adapted to the diameter of the battery pole, and the first positioning cavity (1121) being used to accommodate and position the battery pole; and The first welding cavity (1122) is coaxially connected to the first positioning cavity (1121); the first welding cavity (1122) is arranged at an end of the first positioning cavity (1121) away from the battery; the aperture of the first welding cavity (1122) is larger than the aperture of the first positioning cavity (1121); and the first welding cavity (1122) is configured to be welded and fixed to the battery pole.

6. The battery module according to claim 1, characterized in that: A receiving groove (122) is provided on any one of the first connection area (110) and the second connection area (120), and the receiving groove (122) is used to receive a temperature measuring component, and the temperature measuring component is used to measure the temperature of the bus (100).

7. The battery module according to claim 1, characterized in that: The transition zone (130) comprises: A straight portion (131), a data detection piece being detachably fixed on the straight portion (131), the data detection piece being used to detect the voltage and / or current of the busbar (100); A bending portion (132), wherein both ends of the straight portion (131) along the preset direction are connected to the bending portion (132), the bending portion (132) is connected to the first connection area (110) or the second connection area (120), and the bending portion (132) can be flattened or bent relative to the straight portion (131).

8. The battery module according to claim 7, characterized in that: The extension distance of the straight portion (131) along the preset direction is L1, the extension distance of the bent portion (132) along the preset direction is L2, and L1 / L2=3 / 1.

9. The battery module according to claim 7, characterized in that: The bent portion (132) is bent in a direction away from the battery relative to the first connection area (110) and the second connection area (120), and the vertical distance between the end surface of the straight portion (131) away from the battery and the end surface of the first connection area (110) and / or the second connection area (120) away from the battery is H2, and H2 = 4 mm to 6 mm.

10. The battery module according to claim 7, characterized in that: The busbar (100) further comprises: A fixing member, a fixing through hole (1311) is provided on the straight portion (131), a through hole is provided on the data detection member for detecting the current and / or voltage of the bus (100), and the fixing member is inserted and fixed in the fixing through hole (1311) and the through hole.

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