Battery module and battery pack

Abstract

The utility model discloses a battery module and a battery pack, and relates to the technical field of batteries. The battery module comprises a CCS assembly and a battery cell assembly, the CCS assembly comprises a support and a conducting bar, the conducting bar is fixedly arranged on the support, the two ends, in the first direction, of the support are each provided with a flow guide face, and the flow guide faces are obliquely arranged in the thickness direction of the support; the battery cell assembly comprises a plurality of battery cells arranged along a second direction, the plurality of battery cells are connected in series or in parallel through the conducting bar, the colloid can flow to the side surfaces of the plurality of battery cells along the flow guide surface, and an included angle is formed between the second direction and the first direction. The battery module can guide the flow of the polystyrene foam, and can avoid the problem that the polystyrene foam remains at the edge of the bracket.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially, relates to a kind of battery module and battery pack. BACKGROUND

[0002] Electric vehicle as the representative of green traffic, it has the advantages of energy saving, environmental protection, clean compared with traditional fuel automobile, reduces the environmental protection cost, economic cost of automobile use.Power battery as the core energy storage component of electric vehicle, its safety is more and more valued by user.Power battery is composed of multiple battery modules, in order to improve the overall strength of battery pack, it needs to inject foaming glue into the gap between battery modules.

[0003] However, foaming glue needs to be injected from the bracket of CCS (Cells Contact System, battery contact system) component of battery module after being assembled into shell, and the bracket does not have a separate design of foaming glue flow guide structure, which is easy to cause foaming glue to solidify on the bracket due to slow flow, affecting the heat dissipation and aesthetics of battery module. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of battery module and battery pack, foaming glue can be guided, and the problem of foaming glue remaining on the edge of bracket can be avoided.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A kind of battery module, comprising:

[0007] CCS component, the CCS component includes bracket and conducting bar, the conducting bar is fixedly arranged on the bracket, the bracket is provided with flow guide surface at both ends along the first direction, and the flow guide surface is inclinedly arranged along the thickness direction of the bracket;

[0008] Cell component, comprising a plurality of cells arranged along the second direction, a plurality of cells are connected in series or parallel through the conducting bar, and the colloid can flow to the side surface of a plurality of cells along the flow guide surface, and the second direction is arranged at an angle with the first direction.

[0009] As an optional solution of the above battery module, along the first direction, the two flow guide surfaces of the end of the bracket of the adjacent two CCS components are formed V-shaped flow guide groove, and the bottom of the flow guide groove has flow guide channel to enable the colloid to be injected between the adjacent two cell components.

[0010] As an optional solution of the above battery module, the bracket is provided with adjusting groove, and the conducting bar is arranged in the adjusting groove and can adjust the position in the adjusting groove along the second direction.

[0011] As an optional solution of the above battery module, a limiting column is arranged in the adjusting groove, the conductive row is provided with a waist-shaped hole, the long axis of the waist-shaped hole is arranged along the second direction, and the limiting column is arranged in the waist-shaped hole.

[0012] As an optional solution of the above battery module, the CCS assembly further comprises a signal line connected with a plurality of temperature sensors, and the support is provided with a plurality of temperature measurement holes, each temperature sensor is arranged in a corresponding temperature measurement hole to detect the temperature of the battery cell at the corresponding position.

[0013] As an optional solution of the above battery module, the support is formed with a reinforcing groove below the position of the temperature measurement hole, a fixing cover covering the temperature measurement hole is arranged in the reinforcing groove, the side wall of the fixing cover is open, and the temperature sensor is arranged in the fixing cover and connected with the signal line through the opening.

[0014] As an optional solution of the above battery module, the top of the fixing cover is provided with an observation hole.

[0015] As an optional solution of the above battery module, one end of the battery cell towards the support is provided with an explosion-proof valve, and the support is provided with an explosion-proof hole corresponding to the explosion-proof valve of each battery cell.

[0016] As an optional solution of the above battery module, the battery module further comprises a fixed cross beam arranged below the support, a plurality of battery cells of the battery cell assembly are distributed on both sides of the cross beam along the second direction, the support is provided with a first positioning hole, one side of the cross beam towards the support is provided with a second positioning hole, the first positioning hole and the second positioning hole are arranged correspondingly, and a fastener is arranged in the first positioning hole and the second positioning hole to fix the support and the cross beam.

[0017] A battery pack comprising a shell and a plurality of the battery modules arranged in the shell.

[0018] The battery module and the battery pack have the following beneficial effects:

[0019] The battery module and the battery pack have the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of a battery module provided by the utility model;

[0021] Figure 2 is a structural schematic view of a battery cell assembly provided by the utility model;

[0022] Figure 3 is Figure 1 is a partial enlarged view of A in the figure;

[0023] Figure 4 is a partial schematic view of two supports forming a flow guide groove provided by the utility model;

[0024] Figure 5 is Figure 1 is a partial enlarged view of B in the figure.

[0025] in the figure:

[0026] 1, CCS assembly; 11, support; 111, flow guide surface; 112, adjusting groove; 113, limiting column; 114, temperature measuring hole; 115, reinforcing groove; 116, fixing cover; 117, observation hole; 118, explosion-proof hole; 119, first positioning hole; 12, conductive row; 12a, series conductive row; 12b, output conductive row; 121, waist-shaped hole; 13, signal line; 131, temperature sensor; 14, fixed cross beam;

[0027] 2, battery cell assembly; 21, battery cell; 211, positive pole; 212, negative pole; 213, explosion-proof valve; 22, insulating plate. DETAILED DESCRIPTION

[0028] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as a limitation of the utility model.

[0029] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0030] Unless specifically stated and limited otherwise, the terms "mounting", "connected", "connecting", "fixed", "fixedly connected" should be construed broadly, for example, can be fixed connection, can also be detachable connection; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0031] Unless specifically stated and limited otherwise, the first feature is "on" or "under" the second feature, which can include that the first feature and the second feature are in direct contact, or the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0032] The technical scheme of the utility model will be further illustrated below by specific embodiments in combination with the drawings.

[0033] The embodiment provides a battery pack, which comprises a shell and a plurality of battery modules, the plurality of battery modules are arranged in the shell, and the plurality of battery modules are connected in series or parallel with each other, thereby supplying power to an external circuit.

[0034] As shown in Figure 1 and Figure 2 The battery module comprises a cell assembly 2 and a CCS assembly 1, the cell assembly 2 comprises a plurality of cells 21, and the plurality of cells 21 are connected in series or parallel through the CCS assembly 1. As shown in Figure 1 The CCS assembly 1 comprises a bracket 11, a conductive row 12 and a signal line 13, the conductive row 12 is fixedly arranged on the bracket 11 and is used for connecting the pole of the cell 21, thereby connecting the plurality of cells 21 in parallel or series, and the signal line 13 is used for connecting the conductive row 12, thereby collecting data such as voltage of the conductive row 12, so as to monitor the condition of the plurality of cells 21.

[0035] Since the output voltage can be increased when the battery cells 21 are connected in series, in order to make the output voltage of the battery module meet the requirements of the driving voltage of the electric vehicle, in the embodiment, the plurality of battery cells 21 in the battery module are connected in series in turn. Specifically, the battery cells 21 are square battery cells, the plurality of battery cells 21 are arranged in the second direction (the X direction in the figure) in turn, the positive pole and the negative pole of each battery cell 21 are arranged on the top surface of the square battery cell 21 and are arranged in the first direction (the Y direction in the figure) in a spaced manner, and the positive pole and the negative pole of the adjacent two battery cells 21 are arranged in a staggered manner, and the first direction and the second direction are arranged at an angle.

[0036] As shown in Figure 1 , the conductive row 12 includes two types, one is a series conductive row 12a, and the other is an output conductive row 12b. The series conductive row 12a is used to connect the positive pole of one battery cell 21 and the negative pole of another battery cell 21, since the opposite poles of the adjacent battery cells 21 are close to each other, a plurality of series conductive rows 12a can be used to connect a plurality of battery cells 21 in series, one end of the output conductive row 12b is used to connect the positive pole or the negative pole of the battery cell 21 at the end after being connected in series, and the other end is used to connect the external circuit, so there are two output conductive rows 12b in total, one is the output positive pole, and the other is the output negative pole, and the series conductive row 12a is arranged according to the number of battery cells 21.

[0037] It can be understood that the overall strength of the battery pack is closely related to the safety of the battery pack, if the strength of the battery pack is insufficient, the bumps, vibrations and the like generated during the use of the automobile can easily cause the battery pack to deform, so that the battery cells 21 inside are squeezed to cause thermal runaway, which threatens the safety of life and property of the user.

[0038] In order to improve the overall strength of the battery pack, it is necessary to inject foaming glue into the gap between the battery modules, and the foaming glue is used to bond and fix a plurality of groups of battery modules, so that the plurality of groups of battery modules form a whole, so as to ensure that the battery pack will not bend or deform when subjected to external impact, thereby improving the safety. Generally, the foaming glue needs to be injected from the bracket 11 of the CCS assembly 1 of the battery module after the battery module is assembled into the shell, and the bracket 11 does not have a separate foaming glue flow guide structure, which can easily cause the foaming glue to solidify on the bracket 11 due to slow flow, affecting the heat dissipation and aesthetics of the battery module.

[0039] As shown in Figure 3 and Figure 4To solve the above problems, the battery module provided in the embodiment is shown. The two ends of the support 11 along the first direction are provided with flow guide surfaces 111. The flow guide surfaces 111 are inclined along the thickness direction of the support 11. The gel can flow to the side surface of the plurality of battery cells 21 along the flow guide surfaces 111. The inclined flow guide surfaces 111 can guide the foaming gel, so that the foaming gel flows to the side surface of the battery cell assembly 2, thereby avoiding the problem of residual foaming gel at the edge of the support 11.

[0040] In the embodiment, along the first direction, the two flow guide surfaces 111 at the ends of the supports 11 of the two adjacent CCS assemblies 1 are inclined to form a V-shaped flow guide groove. The bottom of the flow guide groove has a flow guide channel so that the gel can be injected between the two adjacent battery cell assemblies 2. The inclined flow guide surfaces 111 can guide the foaming gel, so that the foaming gel flows to the flow guide channel and is injected between the two battery cell assemblies 2 through the flow guide channel, thereby filling the gap between the adjacent battery modules and avoiding the problem of residual foaming gel at the edge of the support 11.

[0041] In some embodiments, grooves are formed below the flow guide surfaces 111 at the two ends of the support 11 along the first direction. The corresponding grooves of the two adjacent supports 11 form a flow guide channel, so that the foaming gel flows between the two adjacent battery cell assemblies 2.

[0042] As shown in the figure, Figure 4 along the first direction, the supports 11 of the two adjacent CCS assemblies 1 are spaced apart to form a flow guide channel. This structure ensures that the gap between the supports 11 of the two CCS assemblies 1 forms a flow guide channel, thereby ensuring that the foaming gel can flow between the two battery cell assemblies 2 no matter where the foaming gel is injected.

[0043] It should be noted that the injection of foaming gel requires the use of a gun head, and the end of the gun head is in the form of a sharp nozzle, that is, a conical shape, to improve the accuracy of the injection of foaming gel. In the embodiment, in order to adapt the flow guide groove to the gun head, the inclination angle of the flow guide surface 111 is the same as the conical surface of the end of the gun head, so that the gun head can be inserted into the bottom of the flow guide groove, and the gun head can directly inject foaming gel into the flow guide channel.

[0044] It can be understood that due to the size tolerance of the battery cell 21, the deviation between the conductive bar 12 and the pole of the battery cell 21 is likely to occur when the conductive bar 12 is connected to the pole of the battery cell 21, thereby affecting the welding precision and welding effect. As shown in the figure, Figure 3To solve this problem, the bracket 11 is provided with an adjusting groove 112, and the conductive row 12 is arranged in the adjusting groove 112 and can be adjusted in position in the adjusting groove 112 in the second direction. The operator can adjust the position of the conductive row 12 in the adjusting groove 112 in the second direction, so that the conductive row 12 matches the position of the pole of the battery cell 21 to be welded, thereby improving the welding precision and welding effect.

[0045] For ease of description, the bracket 11 is horizontally placed, and the adjusting groove 112 is arranged on the upper surface of the bracket 11. Generally, the conductive row 12 is a copper row or an aluminum row. In this embodiment, the conductive row 12 is taken as an example of an aluminum row.

[0046] As shown in Figures 1-3 The plurality of adjusting grooves 112 arranged in the second direction of the bracket 11 is called an adjusting groove 112 group. In the first direction, the bracket 11 is provided with two adjusting groove 112 groups, and the plurality of adjusting grooves 112 between the two adjusting groove 112 groups are staggered, and the conductive row 12 is arranged in each adjusting groove 112. This structure can make the conductive rows 12 in the two adjusting groove 112 groups connect all the battery cells 21 in series, and the plurality of conductive rows 12 have two output conductive rows 12b, and the rest are series conductive rows 12a. The two output conductive rows 12b are respectively located at the two ends of the bracket 11 in the first direction to output.

[0047] In this embodiment, the adjusting groove 112 is provided with a limiting column 113, and the conductive row 12 is provided with a waist-shaped hole 121, the long axis of the waist-shaped hole 121 is arranged in the second direction, and the limiting column 113 is arranged in the waist-shaped hole 121. The limiting column 113 is used for limiting and positioning the conductive row 12, so that the conductive row 12 can only be adjusted in position in the second direction, thereby reducing the difficulty of the operator adjusting the conductive row 12.

[0048] As shown in Figure 3 and Figure 4 The limiting column 113 is a riveting column, which rivets the conductive row 12 and the bracket 11. After the position of the conductive row 12 is adjusted and riveted with the corresponding pole of the battery cell 21, the riveting column is used to rivet the conductive row 12 and the bracket 11, so as to improve the connection strength of the conductive row 12 and the bracket 11, and ensure the normal use of the battery module.

[0049] In the embodiment, the signal line 13 is connected with a plurality of temperature sensors 131, the support 11 is provided with a plurality of temperature measuring holes 114, and each temperature sensor 131 is arranged in a corresponding temperature measuring hole 114 to detect the temperature of the battery cell 21 at the corresponding position. The temperature sensor 131 can sense the temperature nearby, and when the battery cell 21 has thermal runaway, the temperature sensor 131 nearby can timely sense and generate a corresponding electrical signal to inform the temperature control system inside the battery pack to process, thereby improving the safety of the battery pack.

[0050] As shown in Figure 5 , in order to improve the stability of the temperature sensor 131, the support 11 is provided with a reinforcing groove 115 at the position of the temperature measuring hole 114, and a fixing cover 116 covering the temperature measuring hole 114 is arranged in the reinforcing groove 115. The side wall of the fixing cover 116 is open, and the temperature sensor 131 is arranged in the fixing cover 116 and connected with the signal line 13 through the opening.

[0051] The reinforcing groove 115 can improve the strength of the support 11 at the position of the fixed temperature sensor 131, and avoid deformation of the support 11, while the fixing cover 116 can fix the temperature sensor 131, and at the same time, will not block the temperature measuring hole 114, thereby ensuring the stability of the position of the temperature sensor 131, and avoiding the temperature sensor 131 from shaking and colliding with the battery cell 21 to cause damage.

[0052] Further, the top of the fixing cover 116 is provided with an observation hole 117. It is worth mentioning that the temperature sensor 131 is fixed in the fixing cover 116 by temperature sensing glue, that is, when assembling, temperature sensing glue needs to be injected between the fixing cover 116 and the temperature sensor 131, and the observation hole 117 can observe whether there is air bubble in the temperature sensing glue, whether the actual dispensing state of the temperature sensor 131 is qualified, and whether the position of the temperature sensor 131 is in place, thereby ensuring the normal work of the temperature sensor 131.

[0053] As shown in Figure 2 and Figure 5 , the end of the battery cell 21 towards the support 11 is provided with an explosion-proof valve 213, and the support 11 is provided with an explosion-proof hole 118 corresponding to each explosion-proof valve 213 of the battery cell 21. When the battery cell 21 has thermal runaway, the high pressure inside the battery cell 21 will cause the explosion-proof valve 213 to break, and the explosion-proof hole 118 can avoid the high-temperature and high-pressure gas discharged from the explosion-proof valve 213, thereby playing a role of pressure relief and avoiding explosion.

[0054] As shown in Figure 1As shown, in order to fix the support 11, the battery module further comprises a fixing cross beam 14 arranged below the support 11, a plurality of battery cells 21 of the battery cell assembly 2 are distributed on both sides of the cross beam along the second direction, the support 11 is provided with a first positioning hole 119, the side of the cross beam facing the support 11 is provided with a second positioning hole, the first positioning hole 119 and the second positioning hole are arranged correspondingly, and the fastener is arranged in the first positioning hole 119 and the second positioning hole to fix the support 11 and the cross beam.

[0055] The fastener can be a bolt or a rivet, and the fastener is arranged in the first positioning hole 119 and the second positioning hole to fix the support 11 and the cross beam. In the embodiment, a plurality of battery modules are fixed to the same cross beam, that is, the cross beam is provided with a second positioning hole corresponding to the position of the first positioning hole 119 of the support 11 of each battery module, so as to fix the supports 11 of the plurality of battery modules together, and the accuracy and stability of the positions of the plurality of battery modules are ensured.

[0056] It is worth noting that in the embodiment, a plurality of battery modules are fixed to the same fixing cross beam 14, and then the fixing cross beam 14 is fixed in the shell of the battery pack to fix the plurality of battery modules, so as to ensure the stability of the plurality of battery modules; in some embodiments, the fixing cross beam 14 is a structure inside the battery pack, and when assembling, the support 11 of the battery module is directly fixed on the fixing cross beam 14, further improving the stability.

[0057] As shown in the drawings, Figure 1 The battery module is provided with an insulating plate 22 at both ends along the second direction, and the two insulating plates 22 are fixedly connected with the support 11 and clamp the battery cell assembly 2, which can improve the stability of the battery module, and can separate the battery cell 21 from the shell of the battery pack to avoid short circuit.

[0058] The above is only a preferred embodiment of the present application, and for those skilled in the art, according to the idea of the present application, the specific implementation and application range can be changed, and the content of the specification should not be understood as limiting the present application.

Claims

1. A battery module, characterized by, The application relates to a CCS assembly (1) comprising a bracket (11) and a conductive row (12) fixedly arranged on the bracket (11), wherein the bracket (11) is provided with a flow guide surface (111) at both ends along a first direction, and the flow guide surface (111) is arranged in an inclined manner along the thickness direction of the bracket (11). An electric core assembly (2) comprises a plurality of electric cores (21) arranged in a second direction, and the plurality of electric cores (21) are connected in series or in parallel through the conductive row (12), and the gel can flow to the side surface of the plurality of electric cores (21) along the flow guide surface (111), and the second direction is arranged at an angle with the first direction. Along the first direction, the two flow guide surfaces (111) at the mutually close ends of the brackets (11) of two adjacent CCS assemblies (1) form a V-shaped flow guide groove, and the bottom of the flow guide groove is provided with a flow guide channel so that the gel can be injected between the two adjacent electric core assemblies (2).

2. The battery module of claim 1, wherein, The bracket (11) is provided with an adjusting groove (112), the conductive row (12) is arranged in the adjusting groove (112), and the position of the conductive row (12) in the adjusting groove (112) can be adjusted along the second direction.

3. The battery module of claim 1, wherein, The adjusting groove (112) is provided with a limiting column (113), the conductive row (12) is provided with a waist-shaped hole (121), the long axis of the waist-shaped hole (121) is arranged along the second direction, and the limiting column (113) is arranged in the waist-shaped hole (121).

4. The battery module of claim 3, wherein, The CCS assembly (1) further comprises a signal line (13) connected with a plurality of temperature sensors (131), the bracket (11) is provided with a plurality of temperature measuring holes (114), each temperature sensor (131) is arranged in a corresponding temperature measuring hole (114) to detect the temperature of the corresponding electric core (21).

5. The battery module according to any one of claims 1 to 4, characterized in that, The bracket (11) is provided with a reinforcing groove (115) at the position of the temperature measuring hole (114), the reinforcing groove (115) is provided with a fixing cover (116) covering the temperature measuring hole (114), the side wall of the fixing cover (116) is open, the temperature sensor (131) is arranged in the fixing cover (116) and connected with the signal line (13) through the opening.

6. The battery module of claim 5, wherein, The top of the fixing cover (116) is provided with an observation hole (117).

7. The battery module of claim 6, wherein, One end of the electric core (21) facing the bracket (11) is provided with an explosion-proof valve (213), and the bracket (11) is provided with an explosion-proof hole (118) corresponding to the explosion-proof valve (213) of each electric core (21).

8. The battery module according to any one of claims 1 to 4, characterized by ​ 9. The battery module according to any one of claims 1 to 4, characterized by The battery module further comprises a fixed crossbeam (14) arranged below the support (11), a plurality of the battery cells (21) of the battery cell assembly (2) are distributed on both sides of the crossbeam along the second direction, the support (11) is provided with a first positioning hole (119), a side of the crossbeam facing the support (11) is provided with a second positioning hole, the first positioning hole (119) and the second positioning hole are correspondingly arranged, and a fastener is arranged through the first positioning hole (119) and the second positioning hole to fix the support (11) and the crossbeam.

10. A battery pack, characterized by, The battery module comprises a plurality of groups of the battery module as claimed in any one of claims 1-9, and the plurality of groups of the battery module are arranged in a shell.

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