Battery module and battery pack

Abstract

This application discloses a battery module and a battery pack, belonging to the field of batteries. The battery module includes: a module mounting frame, a connecting strip, and multiple battery cells. The module mounting frame includes: a first mounting frame and a second mounting frame, which are distributed in a first direction and are used to enclose and form at least one assembly chamber. Multiple battery cells are installed in at least one assembly chamber. The assembly chamber formed by the first and second mounting frames provides assembly space for the multiple battery cells. Thus, when installing multiple battery cells in the battery module, the first mounting frame fits onto a portion of the multiple battery cells, and the second mounting frame fits onto another portion of the multiple battery cells, thereby achieving the installation and fixation of multiple battery cells. No squeezing operation is required during the assembly process of the entire battery module, and no steel strips or end plates are needed. This simplifies the structure and assembly work of the battery module and reduces costs.

Description

Technical Field

[0001] This application relates to the field of batteries, and in particular to a battery module and a battery pack. Background Technology

[0002] A battery module is a modular unit composed of one or more battery cells. These cells are combined together to form a complete battery pack, also known as a battery module.

[0003] Currently, during the assembly of battery modules, multiple battery cells are first stacked, then the stacked cells are squeezed together, and finally, steel strips are used to fix the multiple battery cells into a module.

[0004] However, this assembly method is complex and requires components such as steel strips and end plates, which increases the cost of the battery module. Utility Model Content

[0005] This application provides a battery module and a battery pack. It solves the problems of complex assembly and high cost in existing battery modules. The technical solution is as follows:

[0006] In one aspect, a battery module is provided, including: a module mounting bracket, a connector bar, and multiple battery cells;

[0007] The module mounting bracket includes: a first mounting bracket and a second mounting bracket, the first mounting bracket and the second mounting bracket being distributed in a first direction and used to enclose and form at least one assembly chamber; the second mounting bracket has a plurality of through holes on the side opposite to the first mounting bracket;

[0008] The plurality of battery cells are all installed in the at least one assembly chamber, and the plurality of terminals in the plurality of battery cells are exposed through the plurality of through holes;

[0009] The connecting bar is located on the side of the second mounting bracket away from the first mounting bracket, and the connecting bar is electrically connected to multiple terminals in the multiple battery cells through the multiple through holes;

[0010] In this assembly chamber, multiple battery cells are arranged in a second direction, which is perpendicular to the first direction.

[0011] Optionally, the first mounting bracket includes a plurality of first sub-mounting brackets connected in a third-party direction; the second mounting bracket includes a plurality of second sub-mounting brackets connected in the third-party direction.

[0012] The plurality of first sub-mounting brackets and the plurality of second sub-mounting brackets correspond to each other, and each first sub-mounting bracket and its corresponding second sub-mounting bracket are distributed in the first direction and are used to enclose and form an assembly chamber; the third direction is perpendicular to the second direction and perpendicular to the first direction.

[0013] Optionally, in the third direction, there is a flow channel between two adjacent assembly chambers, and the two ends of the flow channel are respectively connected to the two adjacent assembly chambers;

[0014] The circulation channel has a first opening in the third direction located on the side wall of the first sub-mounting bracket and / or the second sub-mounting bracket.

[0015] Optionally, the first mounting bracket further includes: a first adapter located between two adjacent first sub-mount brackets in the third direction, the first adapter being connected to the two adjacent first sub-mount brackets respectively;

[0016] The second mounting bracket further includes a second adapter located between two adjacent second sub-mount brackets in the third direction, the second adapter being connected to the two adjacent second sub-mount brackets respectively.

[0017] Optionally, the first adapter and the second adapter are distributed opposite to each other in the first direction, and the first adapter and the second adapter enclose a ventilation chamber, which is respectively connected to two adjacent assembly chambers;

[0018] The portion of the first adapter in the second direction and / or the portion of the second adapter in the second direction have a second opening, through which the ventilation chamber communicates with the outside.

[0019] Optionally, the two outermost first sub-mounting brackets in the third direction each have a first mating portion; the two outermost second sub-mounting brackets in the third direction each have a second mating portion.

[0020] The first docking part and the second docking part are detachably connected.

[0021] Optionally, the second mounting bracket has an assembly groove on the side opposite to the first mounting bracket, the bottom of the assembly groove is in communication with the plurality of through holes, and at least a portion of the connecting row is located in the assembly groove;

[0022] The battery module further includes an insulating plate, which is connected to the second mounting bracket on the side of the connecting bar opposite to the second mounting bracket, and the insulating plate covers the connecting bar.

[0023] In a second aspect, a battery pack is provided, comprising: a housing and at least one battery module; the at least one battery module is installed in the housing;

[0024] Wherein, the at least one battery module is any of the battery modules described above.

[0025] Optionally, the housing has a first mounting port and a second mounting port that are relatively distributed in the first direction; the number of battery modules is two, namely a first battery module and a second battery module; the first battery module is installed in the housing through the first mounting port; the second battery module is installed in the housing through the second mounting port.

[0026] Optionally, the battery pack further includes: wires, a main connector, and a battery management unit; the first battery module is connected in series with the second battery module via the wires; the main connector is electrically connected to the connector in the first battery module; the battery management unit is sealed to the housing at the first mounting port, and the battery management unit is connected to the main connector.

[0027] Optionally, the battery management unit has a connector on the side facing the housing;

[0028] The end of the main connector that is away from the first battery module is plugged into the connector.

[0029] Optionally, the battery pack further includes a heat-insulating pad, which is fixed between the first battery module and the battery management unit;

[0030] The heat-resistant pad has a first hole, and the end of the main connector that is away from the first battery module passes through the first hole and is plugged into the connector.

[0031] Optionally, the battery management unit has multiple heat dissipation plates arranged in an array on the side opposite to the housing.

[0032] Optionally, the battery pack further includes a cover, which is sealed to the housing at the second mounting opening.

[0033] Optionally, the battery pack further includes: a grounding component and a venting component;

[0034] The grounding component is fixedly connected to the side of the enclosure;

[0035] The grounding component has a clearance hole, the vent is located in the clearance hole, the vent is fixedly connected to the side of the box, and the vent is in communication with the interior of the box.

[0036] The beneficial effects of the technical solutions provided in this application include at least the following:

[0037] The module mounting bracket has a first mounting bracket and a second mounting bracket distributed in a first direction. The assembly chamber formed by the first and second mounting brackets provides assembly space for multiple battery cells. Thus, when installing multiple battery cells in the battery module, the first mounting bracket fits over a portion of the battery cells, and the second mounting bracket fits over another portion, achieving the installation and fixation of multiple battery cells. No squeezing operation is required during the assembly process of the entire battery module, and components such as steel strips and end plates are unnecessary. This simplifies the structure and assembly work of the battery module and reduces costs. Furthermore, the first and second mounting brackets in the module mounting bracket can fully enclose the multiple battery cells in the assembly chamber, improving the structural strength of the battery module. The arrangement of multiple battery cells in the same assembly chamber in a second direction also facilitates the assembly between the multiple battery cells and the module mounting bracket. In addition, multiple terminals in the multiple battery cells are exposed through multiple through holes, meaning that multiple terminals in the multiple battery cells are all located on the same side near the through holes. This facilitates electrical connection between the connector and the multiple terminals in the multiple battery cells. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of a battery module structure provided in an embodiment of this application;

[0040] Figure 2 This is a schematic diagram of another battery module structure provided in an embodiment of this application;

[0041] Figure 3 This is a schematic diagram of a module mounting bracket structure provided in an embodiment of this application;

[0042] Figure 4 This is a schematic diagram of another battery module structure provided in the embodiments of this application;

[0043] Figure 5This is a schematic diagram of another battery module structure provided in the embodiments of this application;

[0044] Figure 6 This is a schematic diagram of a battery module structure provided in another embodiment of this application;

[0045] Figure 7 This is a schematic diagram of a battery pack structure provided in an embodiment of this application;

[0046] Figure 8 This is a schematic diagram of another battery pack structure provided in an embodiment of this application;

[0047] Figure 9 This is a schematic diagram of another battery pack structure provided in the embodiments of this application;

[0048] Figure 10 This is a schematic diagram of a main connection strip plug structure provided in an embodiment of this application;

[0049] Figure 11 yes Figure 8 Enlarged structural diagram at point A in the middle. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0051] Figure 1 This is a schematic diagram of a battery module structure provided in an embodiment of this application. Please refer to it. Figure 1 One embodiment of this application provides a battery module 100, including: a module mounting bracket 110, a connector 120, a signal acquisition line 122, and a plurality of battery cells 130.

[0052] The module mounting bracket 110 includes a first mounting bracket 111 and a second mounting bracket 112, which are distributed in a first direction and are used to enclose and form at least one assembly chamber S1. The second mounting bracket 112 has a plurality of through holes V1 on the side opposite to the first mounting bracket 111.

[0053] Multiple battery cells 130 are installed in at least one assembly chamber S1, and multiple terminals 131 of the multiple battery cells 130 are exposed through multiple through holes V1.

[0054] The connecting strip 120 is located on the side of the second mounting bracket 112 opposite to the first mounting bracket 111, and the connecting strip 120 is electrically connected to multiple terminals 131 of multiple battery cells 130 through multiple through holes V1.

[0055] The signal acquisition line 122 is connected to the connector 120. The signal acquisition line 122 is used to acquire information such as voltage and temperature of multiple battery cells 130 through the connector 120, so that the battery management unit can control the multiple battery cells 130 to work in a suitable environment.

[0056] In this assembly chamber S1, multiple battery cells 130 are arranged in a second direction, which is perpendicular to the first direction.

[0057] It is understood that the statement that multiple battery cells 130 are all installed in at least one assembly chamber S1 means that when the module mounting frame 110 has one assembly chamber S1, multiple battery cells 130 are all located in one assembly chamber S1. When the module mounting frame 110 has two or more assembly chambers S1, the multiple battery cells 130 can be divided into multiple groups. The number of groups to which the multiple battery cells 130 are assigned corresponds to the number of assembly chambers S1 in the module mounting frame 110. For example, the number of groups to which the multiple battery cells 130 are assigned corresponds one-to-one with the number of assembly chambers S1 in the module mounting frame 110.

[0058] It is also understandable that multiple terminals 131 of the multiple battery cells 130 are exposed through multiple through holes V1, that is, the positive and negative terminals of the same battery cell 130 are located on the same side of the battery cell 130, and the positive and negative terminals of multiple battery cells 130 are all located on the side close to the through holes V1 on the second mounting bracket 112. In this way, it is convenient to install multiple battery cells 130 and to connect multiple battery cells 130 to the connecting bus 120. When multiple battery cells 130 are electrically connected to the connecting bus 120 through terminals 131, multiple battery cells 130 can also be connected in series.

[0059] For example, the battery cell 130 has a rectangular block structure. This facilitates assembly of the multiple battery cells 130 installed within the module mounting bracket 110, improves the space utilization of the assembly chamber S1 within the module mounting bracket 110, and allows for a more compact structure of multiple rectangular block battery cells 130. In other feasible embodiments, the battery cell 130 can also be cylindrical or other shapes; this application does not impose specific limitations on this.

[0060] For example, refer to Figure 2 , Figure 2 This is a schematic diagram of another battery module structure provided in an embodiment of this application. Figure 2 The multiple battery cells 130 are divided into a first part F1 and a second part F2 distributed vertically in the first direction. The first part F1 is closer to the first mounting bracket 111 than the second part F2, and the second part F2 is closer to the second mounting bracket 112 than the first part F1.

[0061] Correspondingly, the first mounting bracket 111 has at least one first sub-assembly chamber S11, and the first portions F1 of multiple battery cells 130 are all assembled in the first sub-assembly chamber S11. The second mounting bracket 112 has at least one second sub-assembly chamber S12, and the second portions F2 of multiple battery cells 130 are all assembled in the second sub-assembly chamber S12. After the first mounting bracket 111 and the second mounting bracket 112 are relatively distributed and connected, the first sub-assembly chamber S11 and the corresponding second sub-assembly chamber S12 constitute an assembly chamber S1.

[0062] The first sub-assembly chamber S11 and the second sub-assembly chamber S12 can be configured in a one-to-one correspondence.

[0063] In summary, the module mounting bracket has a first mounting bracket and a second mounting bracket distributed in a first direction. The assembly chamber formed by the first and second mounting brackets provides assembly space for multiple battery cells. Thus, when installing multiple battery cells in the battery module, the first mounting bracket fits over a portion of the battery cells, and the second mounting bracket fits over another portion, achieving the installation and fixation of multiple battery cells. No squeezing operation is required during the assembly process of the entire battery module, and components such as steel strips and end plates are unnecessary. This simplifies the structure and assembly work of the battery module and reduces costs. Furthermore, the first and second mounting brackets in the module mounting bracket can fully enclose the multiple battery cells in the assembly chamber, improving the structural strength of the battery module. The arrangement of multiple battery cells in the same assembly chamber in the second direction also facilitates the assembly between the multiple battery cells and the module mounting bracket. In addition, multiple terminals in the multiple battery cells are exposed through multiple through holes, meaning that the multiple terminals in the multiple battery cells are all located on the same side near the through holes. This facilitates electrical connection between the connector and the multiple terminals in the multiple battery cells.

[0064] Figure 3 This is a schematic diagram of a module mounting bracket structure provided in an embodiment of this application. Please refer to it. Figure 3 In some possible implementations, the first mounting bracket 111 includes a plurality of first sub-mounting brackets 1111 connected in a third-party upward direction. The second mounting bracket 112 includes a plurality of second sub-mounting brackets 1121 connected in a third-party upward direction.

[0065] The plurality of first sub-mount brackets 1111 and the plurality of second sub-mount brackets 1121 correspond to each other. Each first sub-mount bracket 1111 and the corresponding second sub-mount bracket 1121 are distributed in a first direction and are used to enclose and form an assembly chamber S1. The third direction is perpendicular to the second direction and perpendicular to the first direction.

[0066] For example, each first sub-mounting bracket 1111 has a first sub-assembly chamber S11, and each second sub-mounting bracket 1121 has a second sub-assembly chamber S12. The multiple first sub-assembly chambers S11 can be configured one-to-one with the multiple second sub-assembly chambers S12. Correspondingly, the multiple first sub-mounting brackets 1111 and the multiple second sub-mounting brackets 1121 can be configured one-to-one.

[0067] Furthermore, the first sub-assembly chamber S11 in the first sub-mounting frame 1111 and the second sub-assembly chamber S12 in the corresponding second sub-mounting frame 1121 are used to enclose and form a complete assembly chamber S1.

[0068] Multiple assembly chambers S1 are formed in a third direction by multiple first sub-mounting brackets 1111 in the first mounting bracket 111 and multiple second sub-mounting brackets 1121 in the multiple second mounting brackets 112. The module mounting bracket 110 can assemble more battery cells 130 by means of multiple first sub-mounting brackets 1111 and multiple second sub-mounting brackets 1121, and the structural strength of the battery module 100 can be improved by means of multiple first sub-mounting brackets 1111 and multiple second sub-mounting brackets 1121.

[0069] For example, the module mounting frame 110 has two first sub-mounting frames 1111 arranged along a third direction and two second sub-mounting frames 1121 arranged along a third direction. That is, the module mounting frame 110 has two assembly chambers S1 arranged along a third direction. Each assembly chamber S1 is equipped with two battery cells 130 arranged along a second direction. In this way, a total of four battery cells 130 can be installed in the two assembly chambers S1.

[0070] Figure 4 This is a schematic diagram of another battery module structure provided in the embodiments of this application. Please refer to it. Figure 4 In some possible implementations, the battery module 100 also includes multiple heating layers 140.

[0071] A heating layer 140 is located between two adjacent battery cells 130 in an assembly chamber S1, and the two sides of the heating layer 140 that are opposite to each other in the second direction are respectively attached to the sides of the two battery cells 130.

[0072] It is understandable that there are at least two heating layers 140. For example, the battery module 100 includes two assembly chambers S1, and two battery cells 130 are installed in each assembly chamber S1. In this case, the number of heating layers 140 can be two.

[0073] For example, the heating layer 140 is adhesively bonded to the two sides of the battery cell 130 that are disposed opposite each other in the second direction.

[0074] By bonding the heating layer 140 to the battery cell 130, the heating layer 140 can directly transfer heat to the battery cell 130 through thermal conduction, thereby increasing the temperature of the bonded battery cell 130 and ensuring that the battery cell 130 can work normally in low-temperature environments, thus preventing the performance of the battery cell 130 from deteriorating.

[0075] Please refer to Figure 4 In some possible implementations, the multiple heating layers 140 are divided into multiple groups of heating layers 140, and each group of heating layers 140 corresponds one-to-one with a multiple assembly chamber S1. Each group of heating layers 140 is located within a corresponding assembly chamber S1. Furthermore, each group of heating layers 140 contains at least one heating layer 140.

[0076] In this way, each assembly chamber S1 has a set of heating layers 140, so that multiple battery cells 130 in each assembly chamber S1 can be heated as needed (e.g., in low temperature environments) to ensure that multiple battery cells 130 in the assembly chamber S1 can work effectively.

[0077] It is understandable that the number of heating layers 140 in a group of heating layers 140 in the same assembly chamber S1 is N1, and the number of battery cells 130 arranged in the second direction in the same assembly chamber S1 is N2, N1 = N2 - 1.

[0078] The battery module 100 further includes at least one connecting layer 141, which is used to connect two heating layers 140 located in two adjacent assembly chambers S1 and on the same side of the battery cells 130 that are in contact with each other.

[0079] The two heating layers 140 located on the same side of the battery cell 130 in two adjacent assembly chambers S1 can be connected in series by the connecting layer 141, which simplifies the circuit structure in the battery module 100.

[0080] Please refer to Figure 4 In some possible implementations, in the third direction, there is a flow channel L between two adjacent assembly chambers S1, with both ends of the flow channel L communicating with the two adjacent assembly chambers S1 respectively. At least a portion of the connecting layer 141 is located within the flow channel L.

[0081] The circulation channel L has a first opening V2 in the third direction located on the side wall of the first sub-mount bracket 1111 and / or the second sub-mount bracket 1121.

[0082] It is understandable that the first opening V2 is set so that the flow channel L can communicate with two adjacent assembly chambers S1. The first opening V2 of the flow channel L in the third direction is located on the side wall of the first sub-mounting bracket 1111 and / or the second sub-mounting bracket 1121, which can realize the communication between the flow channel L and the two adjacent assembly chambers S1. Therefore, the first opening V2 of the flow channel L in the third direction is located on the side wall of the first sub-mounting bracket 1111 and / or the second sub-mounting bracket 1121.

[0083] For example, the first sub-mounting bracket 1111 and the second sub-mounting bracket 1121 corresponding to the same assembly chamber S1 both have a first opening V2 on the side near the flow channel L.

[0084] A flow channel L is provided between two adjacent assembly chambers S1 to provide thermal isolation. For example, when a battery cell 130 in one assembly chamber S1 experiences thermal runaway due to overcharging, short circuit, or other reasons, the flow channel L can delay the heat transfer to the battery cell 130 in the adjacent assembly chamber S1, thus preventing the failure of the entire battery module 100 and improving module safety.

[0085] Furthermore, through closed channels that connect to two adjacent assembly chambers S1 respectively, conduction between the two adjacent assembly chambers S1 can be achieved. When the two adjacent assembly chambers S1 are connected, an air convection channel can be formed, which improves the temperature uniformity of the multiple battery cells 130 in the battery module 100, thereby extending the overall life of the module.

[0086] Please refer to Figure 4 In some possible implementations, the sidewall of the module mounting bracket 110 has a wire-through port V3, which communicates with a designated assembly chamber S1. The designated assembly chamber S1 is the outermost assembly chamber S1 in the third direction among a plurality of assembly chambers S1.

[0087] The heating layer 140 located in the designated assembly chamber S1 has a lead wire 142, which extends to the outside of the designated assembly chamber S1 through the wire through hole V3.

[0088] For example, the cable pass-through port V3 on the side wall of the module mounting bracket 110 can be a cable pass-through port V3 opened on the first mounting bracket 111 and / or the second mounting bracket 112.

[0089] The heating layer 140 can be powered by the lead wire 142 so that the heating layer 140 can heat the corresponding battery cell 130. Under the action of the connecting layer 141, the lead wire 142 can power multiple heating layers 140 connected in series through the connecting layer 141, thus simplifying the wiring of the battery module 100.

[0090] Please refer to Figure 4 In some possible implementations, the heating layer 140 near the lead wire 142 also has a lead-out layer 143, the size of which is adapted to the size of the wire opening V3. For example, the size of the lead-out layer 143 is slightly smaller than the size of the wire opening V3, so that the lead-out layer 143 can extend out of the module mounting bracket 110 and make an electrical connection with the lead wire 142.

[0091] In some possible implementations, the connecting layer 141 and the two heating layers 140 located on both sides of the connecting layer 141 in the third direction are an integral structure.

[0092] The multiple heating layers 140 and multiple connecting layers 141 in the integrated structure can be processed by integral cutting. Furthermore, it can be understood that the number of heating layers 140 in the integrated structure is N3, and the corresponding number of connecting layers 141 is N4, where N4 = N3 - 1.

[0093] For example, the lead-out layer 143, the corresponding connecting layer 141, and the heating layer 140 are an integral structure.

[0094] Figure 5 This is a schematic diagram of another battery module structure provided in the embodiments of this application. Please refer to it. Figure 5 In some possible implementations, the first mounting bracket 111 further includes a first adapter 1112 located in the third direction between two adjacent first sub-mount brackets 1111, the first adapter 1112 being connected to the two adjacent first sub-mount brackets 1111 respectively.

[0095] The second mounting bracket 112 further includes a second adapter 1122 located between two adjacent second sub-mount brackets 1121 in a third direction, the second adapter 1122 being connected to the two adjacent second sub-mount brackets 1121 respectively.

[0096] The first adapter 1112 connects two adjacent first sub-mounting brackets 1111 in the third-party direction, and the second adapter 1122 connects two adjacent second sub-mounting brackets 1121 in the third-party direction. That is, in the third-party direction, an adapter (i.e., the first adapter 1112 and the second adapter 1122) is provided between two adjacent module mounting brackets 110. On the one hand, it can provide shock absorption and improve mechanical protection. On the other hand, the connector between the two adjacent module mounting brackets 110 can also separate the two adjacent module mounting brackets 110 to provide thermal insulation.

[0097] Please refer to Figure 5In some possible implementations, the first adapter 1112 and the second adapter 1122 are distributed relative to each other in a first direction, and the first adapter 1112 and the second adapter 1122 enclose a ventilation chamber S2, which is connected to two adjacent assembly chambers S1 respectively.

[0098] The ventilation chamber S2 can form a flow channel L connecting two adjacent assembly chambers S1, so as to improve the temperature consistency of multiple battery cells 130 in the battery module 100.

[0099] The portion of the first adapter 1112 disposed in the second direction and / or the portion of the second adapter 1122 disposed in the second direction have a second opening V4, through which the ventilation chamber S2 communicates with the outside.

[0100] By having a second opening V4 in the portion of the first adapter 1112 provided in the second direction and / or in the portion of the second adapter 1122 provided in the second direction, the ventilation chamber S2 can communicate with the outside (space outside the module mounting bracket 110) through the second opening V4, which can further improve the temperature uniformity of multiple battery cells 130 in the battery module 100.

[0101] For example, the first adapter 1112 can be an upright U-shaped or approximately U-shaped plate structure, and the first adapter 1112 is connected to the sidewall of the adjacent first sub-mounting bracket 1111 on both sides in the third direction. The second adapter 1122 can be an inverted U-shaped or approximately U-shaped plate structure, and the second adapter 1122 is connected to the sidewall of the adjacent second sub-mounting bracket 1121 on both sides in the third direction.

[0102] In the first adapter 1112, two relatively distributed plates are relatively distributed in the second direction, and in the second adapter 1122, two relatively distributed plates are also relatively distributed in the second direction.

[0103] It is understandable that the U-shaped opening in the first adapter 1112 and the U-shaped opening in the second adapter 1122 are relatively distributed in the first direction.

[0104] Please refer to Figure 5 In some possible implementations, the first sub-mounting bracket 1111 protrudes from the first adapter 1112 in the second direction, and the second sub-mounting bracket 1121 protrudes from the second adapter 1122 in the second direction, so that a limiting groove is formed at the positions of the first adapter 1112 and the second adapter 1122 on the same side of the module mounting bracket 110 in the second direction. The limiting groove is used to cooperate with the limiting protrusion provided on the inner wall of the housing.

[0105] The limiting groove on the module mounting bracket 110 and the limiting protrusion on the inner wall of the box cooperate to facilitate the installation of the battery module 100 in the box and to limit and fix the battery module 100 in the box.

[0106] Figure 6 This is a schematic diagram of a battery module structure provided in another embodiment of this application. Please refer to it. Figure 6 In some possible implementations, the two outermost first sub-mounting brackets 1111 in the third direction each have a first mating portion 1113. The two outermost second sub-mounting brackets 1121 in the third direction each have a second mating portion 1123.

[0107] The first docking part 1113 and the second docking part 1123 are detachably connected.

[0108] The first mounting bracket 111 and the second mounting bracket 112 can be quickly installed through the first docking part 1113 and the second docking part 1123. This allows the second mounting bracket 112 to be directly fitted onto the other part of the multiple battery cells 130 after a portion of the battery cells 130 is mounted on the first mounting bracket 111 during the assembly of the battery module 100. Then, the battery module 100 can be assembled through the first docking part 1113 and the second docking part 1123, thus simplifying the assembly work of the battery module 100.

[0109] For example, the first mating part 1113 and the second mating part 1123 are locked together by screws or bolts.

[0110] For example, the first mounting bracket 111 and the second mounting bracket 112 can both be plastic brackets to realize the assembly of multiple battery cells 130 and ensure the structural strength of the battery module 100.

[0111] Please refer to Figure 6 In some possible implementations, the second mounting bracket 112 has a mounting groove X1 on the side opposite to the first mounting bracket 111, the bottom of the mounting groove X1 is connected to a plurality of through holes V1, and at least a portion of the connecting row 120 is located in the mounting groove X1.

[0112] The battery module 100 also includes an insulating plate 150, which is connected to the second mounting bracket 112 on the side of the connecting strip 120 away from the second mounting bracket 112, and the insulating plate 150 covers the connecting strip 120.

[0113] For reference Figure 4The connecting busbar 120 includes multiple aluminum busbars 121. The multiple aluminum busbars 121 are electrically connected to multiple terminals 131 of multiple battery cells 130 through multiple through holes V1, and the multiple battery cells 130 are connected in series through the multiple aluminum busbars 121. A signal acquisition line 122 is connected to the multiple aluminum busbars 121.

[0114] The assembly slot X1 facilitates the installation, positioning, and welding of the aluminum busbar 121, improving the assembly efficiency of the battery module 100. The insulating plate 150 covering the connecting busbar 120, located on the side facing away from the second mounting bracket 112, provides insulation protection, enhancing the safety of the battery module 100.

[0115] For example, the second mounting bracket 112 has a first mounting portion X11, a second mounting portion X12, and a third mounting portion X13 on the side opposite to the first mounting bracket 111.

[0116] The first assembly part X11 is at least a pair, and the pair of first assembly parts X11 can be distributed opposite each other in the second direction. The first assembly part X11 is, for example, a snap-fit ​​structure, to restrict the position of the aluminum busbar 121 in the connecting row 120 in the first and second directions. The second assembly part X12 and the third assembly part X13 are each at least a pair, and the pair of second assembly parts X12 and the pair of third assembly parts X13 are distributed opposite each other in the third direction. The second assembly parts X12 and the third assembly parts X13 are, for example, block-shaped or plate-shaped structures, and the second assembly parts X12 and the third assembly parts X13 can be the same or different. The second assembly parts X12 and the third assembly parts X13 can restrict the position of the aluminum busbar 121 in the connecting row 120 in the third direction. Thus, the first assembly parts X11, the second assembly parts X12, and the third assembly parts X13 can be enclosed to form an assembly groove X1 to facilitate the installation, positioning, and welding of the aluminum busbar 121.

[0117] Please refer to Figure 6 In some possible implementations, the sidewall of the module mounting bracket 110 has a guide groove X2, which is used to accommodate a portion of the wire harness in the signal acquisition line 122.

[0118] For example, the guide groove X2 can be a groove-shaped structure formed by the inward recess of the side wall of the module mounting bracket 110, or two protruding structures can be provided on the side wall of the module mounting bracket 110, with the guide groove X2 formed between the two protruding structures.

[0119] For example, a rib X21 is provided on the side wall of the module mounting bracket 110 at a position adjacent to the first docking portion 1113, and a guide groove X2 is formed between the rib X21 and the block-shaped first docking portion 1113.

[0120] In summary, the module mounting bracket has a first mounting bracket and a second mounting bracket distributed in a first direction. The assembly chamber formed by the first and second mounting brackets provides assembly space for multiple battery cells. Thus, when installing multiple battery cells in the battery module, the first mounting bracket fits over a portion of the battery cells, and the second mounting bracket fits over another portion, achieving the installation and fixation of multiple battery cells. No squeezing operation is required during the assembly process of the entire battery module, and components such as steel strips and end plates are unnecessary. This simplifies the structure and assembly work of the battery module and reduces costs. Furthermore, the first and second mounting brackets in the module mounting bracket can fully enclose the multiple battery cells in the assembly chamber, improving the structural strength of the battery module. The arrangement of multiple battery cells in the same assembly chamber in the second direction also facilitates the assembly between the multiple battery cells and the module mounting bracket. In addition, multiple terminals in the multiple battery cells are exposed through multiple through holes, meaning that the multiple terminals in the multiple battery cells are all located on the same side near the through holes. This facilitates electrical connection between the connector and the multiple terminals in the multiple battery cells.

[0121] There are generally two integration schemes for battery packs: The first scheme involves stacking individual battery cells, compressing them, and securing them into modules using steel strips. Multiple modules are then installed and fixed into a housing to form the battery pack. This scheme is complex to assemble, requires extrusion fixtures, and the steel strips, end plates, and other components are costly. The second scheme uses a CTP (Cell To Pack) structure, eliminating the module stage and omitting end plates and steel strips, utilizing the housing structure itself to secure the battery cells. This scheme is less expensive, but its overall structural strength is limited, making it unsuitable for environments requiring strong earthquake resistance.

[0122] Figure 7 This is a schematic diagram of a battery pack structure provided in an embodiment of this application. Please refer to it. Figure 7 Another embodiment of this application provides a battery pack 200, including: a housing 210 and at least one battery module 100. The at least one battery module 100 is installed inside the housing 210.

[0123] At least one battery module 100 is any of the battery modules 100 described above.

[0124] Since the battery pack 200 includes the battery module 100 as described in the above embodiment, the battery pack 200 has the advantages of simple and compact structure, convenient assembly, and the ability to meet structural strength requirements.

[0125] Figure 8 This is a schematic diagram of another battery pack structure provided in an embodiment of this application. Please refer to it. Figure 8In some possible implementations, the housing 210 has a first mounting opening 211 and a second mounting opening 212 that are relatively distributed in a first direction. There are two battery modules 100, namely a first battery module 100a and a second battery module 100b. The first battery module 100a is mounted inside the housing 210 through the first mounting opening 211. The second battery module 100b is mounted inside the housing 210 through the second mounting opening 212.

[0126] The battery pack 200 is designed by vertically stacking two modules, with the first battery module 100a and the second battery module 100b docking in the first direction. This design saves space, facilitates fixing, and improves assembly efficiency. For example, the first battery module 100a and the second battery module 100b can be installed simultaneously at the first mounting port 211 and the second mounting port 212, respectively.

[0127] The inner wall of the housing 210 is provided with a limiting protrusion 213, which is connected to the limiting groove X3 in the battery module 100 through a concave-convex fit.

[0128] Please refer to Figure 8 In some possible implementations, the battery pack 200 also includes: wires 220, main connection bar 230, battery management unit 240 and cover 250.

[0129] The first battery module 100a is connected in series with the second battery module 100b via wire 220. The main connection bar 230 is electrically connected to the connection bar 120 in the first battery module 100a. The battery management unit 240 is sealed to the housing 210 at the first mounting port 211, and the battery management unit 240 is connected to the main connection bar 230.

[0130] The cover 250 is sealed to the housing 210 at the second mounting port 212. For example, a sealing ring is provided between the cover 250 and the first mounting port 211 to enhance the sealing between the cover 250 and the housing 210 at the first mounting port 211. The battery management unit 240 is sealed to the housing 210 at the second mounting port 212. For example, a sealing ring is provided between the battery management unit 240 and the second mounting port 212 to enhance the sealing between the battery management unit 240 and the housing 210 at the second mounting port 212.

[0131] Figure 9 This is a schematic diagram of another battery pack structure provided in the embodiments of this application. Please refer to it. Figure 9 The battery management unit 240 has a connector J1 on the side facing the second battery module 100b inside the housing 210. The end of the main connector 230 opposite to the first battery module 100a is blindly connected to the connector J1.

[0132] The main connector 230 and the plug interface J1 are connected by a blind-fitting concave-convex joint, which facilitates quick connection between the main connector 230 and the battery management unit 240.

[0133] For example, the total connection row 230 includes a total positive output board and a total negative output board.

[0134] Figure 10 This is a schematic diagram of a main connection strip plug structure provided in an embodiment of this application. Please refer to it. Figure 9 and Figure 10 In some possible implementations, the battery management unit 240 has two pairs of plug plates 241 on the side facing the first mounting port 211, with two plug plates 241 in each pair facing each other and spaced apart to form a plug interface J1.

[0135] Each pair of plug-in plates 241 has a guide surface J2 and a pre-tightening surface J3 on the side of the plug-in interface J1 that is close to each other. The guide surface J2 is located on the side of the plug-in interface J1 that is close to the first battery module 100a, and the pre-tightening surface J3 is located on the side of the guide surface J2 that is away from the first battery module 100a.

[0136] The main connecting bar 230 enters the insertion interface J1 through the guide surface J2 and abuts against the pre-tightening surface J3.

[0137] The guide surface J2 facilitates the entry of the main connector 230 into the plug-in interface J1, enabling quick connection. The pre-tightening surface J3, located relatively close to the inside of the plug-in interface J1, ensures the stability and effectiveness of the connection between the main connector 230 and the plug-in plate 241.

[0138] For example, with Figure 10 For example, along the insertion direction of the main connector 230 ( Figure 10 As indicated by the middle arrow, the distance between the guide surfaces J2 of the two plug-in plates 241 continuously decreases. The pre-tightening surface J3 is an arc-shaped surface. The minimum distance between the two corresponding pre-tightening surfaces J3 of the two plug-in plates 241 is less than the thickness of the total connecting bar 230 (i.e., the size of the total connecting bar 230 along the insertion direction perpendicular to the total connecting bar 230). Thus, during the insertion of the total connecting bar 230, the two plug-in plates 241 will open, and a certain pre-tightening force can be provided to the total connecting bar 230 through the pre-tightening surface J3, ensuring the stability and effectiveness of the connection between the total connecting bar 230 and the plug-in plates 241.

[0139] Figure 11 yes Figure 8 Please refer to the enlarged structural diagram at point A. Figure 8 and Figure 11In some possible implementations, the inner wall of the housing 210 is provided with a plurality of circumferentially spaced columns 214 near the first mounting port 211 and the second mounting port 212. The second mounting bracket 112 in the first battery module 100a is connected to the column 214 provided on the inner wall of the housing 210 near the first mounting port 211, and the second mounting bracket 112 in the second battery module 100b is connected to the column 214 provided on the inner wall of the housing 210 near the second mounting port 212.

[0140] The first battery module 100a and the second battery module 100b can be installed inside the housing 210 via the column 214, avoiding interference between the first battery module 100a and the cover 250, and avoiding interference between the second battery module 100b and the battery management unit 240. In this way, the space inside the housing 210 can be fully utilized, making the structural design of the battery pack 200 more compact and reasonable.

[0141] Please refer to Figure 8 In some possible implementations, the battery management unit 240 has multiple heat sinks 242 arranged in an array on the side opposite to the housing 210. The heat dissipation effect is enhanced by the multiple heat sinks 242 so as to cool down the battery management unit 240 in a timely manner and ensure the normal operation of the battery management unit 240.

[0142] The battery pack 200 also includes a thermal pad 260. The thermal pad 260 is fixed between the first battery module 100a and the battery management unit 240. By distributing the thermal pad 260 between the first battery module 100a and the battery management unit 240, heat transfer between the first battery module 100a and the battery management unit 240 can be effectively blocked, ensuring the normal operation of the battery pack 200.

[0143] The heat-insulating pad 260 has a first hole K1. The end of the main connecting strip 230 facing away from the first battery module 100a passes through the first hole K1 and is plugged into the connector J1.

[0144] For example, the heat-insulating pad 260 is fixed between the insulating plate 150 and the battery management unit 240 in the first battery module 100a.

[0145] Correspondingly, the insulating plate 150 in the first battery module 100a also has a second hole K2 corresponding to the first hole K1, so that the main connection bar 230 can pass through the second hole K2 and the first hole K1 to be plugged into the interface J1.

[0146] Please refer to Figure 8 In some possible implementations, the battery pack 200 also includes a grounding element 270 and a venting element 280.

[0147] The grounding component 270 is fixedly connected to the side of the enclosure 210.

[0148] The grounding component 270 has a clearance hole V5, and the venting component 280 is located inside the clearance hole V5. The venting component 280 is fixedly connected to the side of the housing 210 and communicates with the interior of the housing 210. The outer wall of the housing 210 is provided with the grounding component 270 and the venting component 280.

[0149] Grounding component 270 is used to connect to the grounding system, release leakage current and static electricity from battery pack 200, prevent potential difference from causing electric sparks, avoid the risk of electric shock, ensure personnel safety, and at the same time suppress electromagnetic interference to ensure the stable operation of equipment such as battery management unit 240.

[0150] The vent 280 serves two purposes: firstly, it can be used to test the sealing performance of the housing 210; secondly, in the event of thermal runaway of the battery cell 130, the vent 280 can be used as a vent for explosion relief. For example, the vent can be a vent valve.

[0151] For example, the battery pack 200 in this application embodiment is a small battery pack that can be used outdoors, such as a battery pack hung on a utility pole.

[0152] The assembly of the battery pack 200 is mainly divided into two steps: module assembly and battery pack 200 assembly.

[0153] Module assembly process with Figure 4 Taking this as an example, the module assembly process is as follows:

[0154] Take a heating layer 140, which has two heating elements of the same size on the large surface of each battery cell 130. Connect them together through the connecting layer 141 in the middle. Then, leave a lead wire 142 on the right side of the heating layer 140. Peel off the release paper on one side of the heating layer 140. First, attach the two battery cells 130 to the heating layer 140, making sure that the two battery cells 130 are spaced apart and adhere to the edge of the heating layer 140.

[0155] The heating layer 140 has double-sided adhesive. Peel off the release paper on the other side, then take two battery cells 130 and stick them together with the two battery cells 130 in front to fix them in place.

[0156] Remove the first mounting bracket 111, which is used to hold and fix a portion of multiple battery cells 130. Place the stacked four battery cells 130 into the first mounting bracket 111 with the terminal posts 131 of the battery cells 130 facing upwards.

[0157] Take out the second mounting bracket 112, which has an assembly slot X1 for fixing the aluminum busbar 121. Place the aluminum busbar 121 into the assembly slot X1 and then weld the acquisition line to the aluminum busbar 121.

[0158] The second mounting bracket 112 is fitted onto another part of the plurality of battery cells 130, and the first mating part 1113 in the first mounting bracket 111 and the second mating part 1123 in the second mounting bracket 112 are connected by bolts.

[0159] After locking, the first mounting bracket 111 and the second mounting bracket 112 are placed in the welding room for FSF laser welding of aluminum busbar 121 to connect aluminum busbar 121 and pole post 131.

[0160] Then, an insulating plate 150 is installed on the side of the second mounting bracket 112 opposite to the first mounting bracket 111, thus completing the assembly of the battery module 100.

[0161] Battery pack 200 assembly process Figure 8 Taking the battery pack 200 as an example, the assembly process is as follows:

[0162] The first battery module 100a is pushed into the housing through the first mounting port 211, and the second mounting bracket 112 in the first battery module 100a is fixed in the housing 210 by screws.

[0163] The second battery module 100b is pushed into the housing through the second mounting port 212, and the second mounting bracket 112 in the second battery module 100b is fixed inside the housing 210 by screws. The main connecting strip 230 is fixed on the connecting strip 120 in the second battery module 100b.

[0164] Then, a heat-insulating pad 260 is installed on the side of the second battery module 100b away from the first battery module 100a, and the main connection bar 230 is exposed through the insulating plate 150 and the heat-insulating pad 260.

[0165] Remove the cover 250, install the sealing strip, and fix the cover 250 with the sealing strip to the first mounting port 211 of the box 210.

[0166] Remove the battery management unit 240, install the sealing strip, and fix the battery management unit 240 with the sealing strip installed to the second mounting port 212 of the housing 210. Connect the main connector 230 inside the housing 210 to the battery management unit 240.

[0167] Finally, the venting component 280 and the grounding component 270 are installed on the outside of the enclosure 210.

[0168] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0169] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery module, characterized in that, include: The module mounting bracket (110), the connector bar (120), and multiple battery cells (130) are included. The module mounting bracket (110) includes: a first mounting bracket (111) and a second mounting bracket (112), the first mounting bracket (111) and the second mounting bracket (112) being distributed in a first direction and used to enclose and form at least one assembly chamber (S1); the second mounting bracket (112) has a plurality of through holes (V1) on the side opposite to the first mounting bracket (111); The plurality of battery cells (130) are all installed in the at least one assembly chamber (S1), and the plurality of terminals (131) in the plurality of battery cells (130) are exposed through the plurality of through holes (V1); The connecting bar (120) is located on the side of the second mounting bracket (112) away from the first mounting bracket (111), and the connecting bar (120) is electrically connected to the multiple terminals (131) of the multiple battery cells (130) through the multiple through holes (V1); In this assembly chamber (S1), a plurality of battery cells (130) are arranged in a second direction, which is perpendicular to the first direction.

2. The battery module according to claim 1, characterized in that, The first mounting bracket (111) includes a plurality of first sub-mounting brackets (1111) connected in a third-party upward direction; the second mounting bracket (112) includes a plurality of second sub-mounting brackets (1121) connected in the third-party upward direction; The plurality of first sub-mounting brackets (1111) and the plurality of second sub-mounting brackets (1121) correspond to each other. Each first sub-mounting bracket (1111) and the corresponding second sub-mounting bracket (1121) are distributed in the first direction and are used to enclose and form an assembly chamber (S1). The third direction is perpendicular to the second direction and perpendicular to the first direction.

3. The battery module according to claim 2, characterized in that, In the third direction, there is a flow channel (L) between two adjacent assembly chambers (S1), and the two ends of the flow channel (L) are respectively connected to the two adjacent assembly chambers (S1); wherein, the first opening (V2) of the flow channel (L) in the third direction is located on the side wall of the first sub-mounting bracket (1111) and / or the second sub-mounting bracket (1121).

4. The battery module according to any one of claims 2 to 3, characterized in that, The first mounting bracket (111) further includes: a first adapter (1112) located between two adjacent first sub-mount brackets (1111) in the third direction, the first adapter (1112) being connected to the two adjacent first sub-mount brackets (1111) respectively. The second mounting bracket (112) further includes a second adapter (1122) located between two adjacent second sub-mount brackets (1121) in the third direction, the second adapter (1122) being connected to the two adjacent second sub-mount brackets (1121) respectively.

5. The battery module according to claim 4, characterized in that, The first adapter (1112) and the second adapter (1122) are distributed opposite to each other in the first direction, and the first adapter (1112) and the second adapter (1122) enclose a ventilation chamber (S2), which is connected to two adjacent assembly chambers (S1). The portion of the first adapter (1112) disposed in the second direction and / or the portion of the second adapter (1122) disposed in the second direction have a second opening (V4), through which the ventilation chamber (S2) communicates with the outside.

6. The battery module according to any one of claims 2 to 3 and 5, characterized in that, The two outermost first sub-mounting brackets (1111) in the third direction each have a first mating portion (1113); the two outermost second sub-mounting brackets (1121) in the third direction each have a second mating portion (1123). The first docking part (1113) and the second docking part (1123) are detachably connected.

7. The battery module according to any one of claims 1 to 3 and 5, characterized in that, The second mounting bracket (112) has a mounting groove (X1) on the side opposite to the first mounting bracket (111), the bottom of the mounting groove (X1) is connected to the plurality of through holes (V1), and at least a portion of the connecting row (120) is located in the mounting groove (X1). The battery module further includes an insulating plate (150), which is connected to the second mounting bracket (112) on the side of the connecting bar (120) away from the second mounting bracket (112), and the insulating plate (150) covers the connecting bar (120).

8. A battery pack, characterized in that, include: The housing (210) and at least one battery module; At least one battery module is installed inside the housing (210); Wherein, the at least one battery module is the battery module according to any one of claims 1 to 7.

9. The battery pack according to claim 8, characterized in that, The housing (210) has a first mounting port (211) and a second mounting port (212) that are relatively distributed in the first direction; there are two battery modules, namely a first battery module (100a) and a second battery module (100b); the first battery module (100a) is installed in the housing (210) through the first mounting port (211); the second battery module (100b) is installed in the housing (210) through the second mounting port (212).

10. The battery pack according to claim 9, characterized in that, The battery pack also includes: wires (220), a main connector (230), and a battery management unit (240); The first battery module (100a) is connected in series with the second battery module (100b) via the wire (220); the main connection bar (230) is electrically connected to the connection bar (120) in the first battery module (100a); the battery management unit (240) is sealed to the housing (210) at the first mounting port (211), and the battery management unit (240) is connected to the main connection bar (230).

11. The battery pack according to claim 10, characterized in that, The battery management unit (240) has a connector (J1) on the side facing the housing (210); The end of the main connector (230) facing away from the first battery module (100a) is connected to the connector (J1).

12. The battery pack according to claim 11, characterized in that, The battery pack further includes a heat-insulating pad (260), which is fixed between the first battery module (100a) and the battery management unit (240); The heat-insulating pad (260) has a first hole (K1). The end of the main connecting bar (230) facing away from the first battery module (100a) passes through the first hole (K1) and is plugged into the connector (J1).

13. The battery pack according to claim 10, characterized in that, The battery management unit (240) has multiple heat sinks (242) arranged in an array on the side opposite to the housing (210).

14. The battery pack according to any one of claims 9 to 13, characterized in that, The battery pack further includes a cover (250) that is sealed to the housing (210) at the second mounting port (212).

15. The battery pack according to any one of claims 8 to 13, characterized in that, The battery pack also includes: a grounding element (270) and a venting element (280); The grounding component (270) is fixedly connected to the side of the housing (210); The grounding member (270) has a clearance hole (V5), the venting member (280) is located in the clearance hole (V5), the venting member (280) is fixedly connected to the side of the box (210), and the venting member (280) communicates with the interior of the box (210).

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