Battery module and electric vehicle

Abstract

The utility model discloses a battery module and an electric vehicle, and relates to the technical field of vehicles, the battery module comprises a box body assembly, a mounting rack and a circuit board; the box body assembly comprises a box body and a cover body, the box body and the cover body are connected and define a cavity, and a plurality of battery cells arranged at intervals are arranged in the cavity; the cavity is used for filling heat-conducting filling and sealing liquid; the mounting rack is connected with the cover body or the box body; the circuit board is connected with the mounting rack; a gap is formed between the circuit board and the battery cell; and each battery cell is electrically connected with the circuit board. According to the technical scheme provided by the utility model, the heat dissipation insulating liquid is poured into the cavity defined by the box body and the cover body, so that the good heat dissipation effect of the battery cell is ensured by utilizing the heat dissipation insulating liquid under the conditions that the battery cell is high in density and high in heat yield; the mounting rack is arranged for mounting the circuit board, so that a gap is formed between the circuit board and the battery cell, the circuit board is prevented from being attached to the outer surface of the battery cell, and the heat dissipation efficiency of the circuit board and the battery cell can be improved at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of transportation tools, in particular to a battery module and an electric vehicle. Background Art

[0002] In recent years, with the advancement of technology, consumers' demand for environmentally friendly travel has increased, the traditional fuel motorcycle industry has shown a downward trend in demand, and the high-speed electric motorcycle market has shown a rapid growth trend. Among them, the battery is the core component of the electric motorcycle, and its performance and quality directly determine the motorcycle's range and user experience. The batteries of high-speed electric motorcycles are mainly divided into two categories: lithium-ion batteries and lead-acid batteries. However, lead-acid batteries have disadvantages such as large size, low energy density, and short cycle life, which cannot match the use of mainstream electric motorcycles. Lithium-ion batteries have the advantages of light weight, high energy density, and long cycle life, so choosing lithium-ion batteries as the power source for electric motorcycles has become the mainstream.

[0003] As vehicles have higher and higher requirements for driving range, the development of power batteries tends to form high-energy-density battery modules with high cell density. However, high-energy-density battery modules tend to generate a lot of heat during the charging and discharging process, and in existing power batteries, air cooling and liquid cooling plates are basically used to dissipate heat from battery cells. However, this heat dissipation structure can no longer meet the heat dissipation requirements of high-energy-density battery modules. Utility Model Content

[0004] The main purpose of the utility model is to provide a battery module and an electric vehicle, aiming to solve the problem of poor heat dissipation effect existing in existing high energy density batteries.

[0005] To achieve the above-mentioned purpose, the battery module proposed by the utility model comprises:

[0006] A box assembly, the box assembly comprising a box and a cover, the box and the cover are connected to form a cavity, a plurality of cells are arranged at intervals in the cavity; the cavity is used to be filled with a heat-conducting potting liquid;

[0007] A mounting frame connected to the cover body or the box body;

[0008] A circuit board is connected to the mounting frame; a spacing is provided between the circuit board and the battery cells; and each of the battery cells is electrically connected to the circuit board.

[0009] In one embodiment, the battery module further includes a collection component, the collection component is electrically connected to the circuit board, each of the battery cells is electrically connected to the collection component, and the collection component is used to obtain performance parameters of each of the battery cells.

[0010] In one embodiment, the acquisition component includes a voltage sensor, a current sensor and a temperature sensor, the voltage sensor is electrically connected to the battery cell and the circuit board, respectively; the current sensor is electrically connected to the battery cell and the circuit board, respectively; the temperature sensor is arranged on the outer surface of the battery cell, and the temperature sensor is electrically connected to the circuit board.

[0011] In one embodiment, the mounting bracket is provided with a mounting groove, a limiting structure is provided in the mounting groove, the circuit board is arranged in the mounting groove, and the limiting structure is used to limit the relative movement between the circuit board and the mounting groove.

[0012] In one embodiment, a plurality of battery cells are connected in series to form a battery pack; the plurality of battery cells are arranged along the width direction of the box; and / or,

[0013] The battery module comprises a plurality of battery groups, and the plurality of battery groups are arranged along the length direction of the box; the plurality of battery groups are connected in series and electrically connected to the power device; and / or;

[0014] The battery module further comprises a plurality of conductive connection bars, one group of battery cells is provided with at least one conductive connection bar, and both ends of the conductive connection bar are respectively electrically connected to adjacent battery groups; and / or,

[0015] The negative terminals of adjacent battery packs are located on the same side as the positive terminals of another battery pack; and / or,

[0016] The battery pack at the front end is electrically connected to the first pole of the circuit board, and the battery pack at the rear end is connected to the positive pole or negative pole of the power device; the second pole of the circuit board is connected to the other of the positive pole or negative pole of the power device.

[0017] In one embodiment, the battery pack further includes a first limit plate and a second limit plate, the first limit plate and the second limit plate are respectively extended along the width direction of the box body, an arrangement space is formed between the first limit plate and the second limit plate, and a plurality of the battery cells are arranged in the arrangement space; the first limit plate is detachably connected to the cover body and / or the box body; the second limit plate is detachably connected to the cover body and / or the box body.

[0018] In one embodiment, a groove is provided on one side of the first limiting plate; one end of the conductive connection row is located in the groove of one battery pack, and the other end of the conductive connection row is located in the groove of an adjacent battery pack; and / or,

[0019] The second limiting plate of one battery pack is fixedly connected to the first limiting plate of an adjacent battery pack.

[0020] In one embodiment, the box body is provided with a first mounting portion and a second mounting portion, the first mounting portion is used to mount the wireless communication device, and the second mounting portion is used to mount the positioning device.

[0021] In one embodiment, the battery module further comprises an insulating layer, and the insulating layer is disposed on the inner wall of the box body and / or the inner wall of the cover body; and / or,

[0022] The battery module further comprises a shock absorbing layer, two sides of which are respectively in contact with adjacent battery cells; and / or,

[0023] The battery module further comprises an adhesive layer, and the adhesive layer is used to bond adjacent battery cells.

[0024] The utility model also provides an electric vehicle, comprising the battery module as described above.

[0025] The technical solution of the utility model is to inject heat dissipation insulating liquid into the cavity surrounded by the box body and the cover body, and use heat dissipation insulating glue to ensure good heat dissipation effect of the battery cells when the battery cells are high in density and generate high heat. At the same time, since the battery cells are arranged at intervals, in the case of uncontrolled heat generation in a certain battery cell, it can also prevent heat diffusion from spreading to adjacent battery cells, thereby providing good protection. By arranging a mounting frame for mounting the circuit board, a spacing can be set between the circuit board and the battery cell to avoid the circuit board being attached to the outer surface of the battery cell, and the heat dissipation efficiency of the circuit board and the battery cell can be improved at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the exploded structure of an embodiment of a battery module provided by the utility model;

[0028] Figure 2 A schematic diagram of the internal structure of a battery module according to an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of the structure of a battery pack of an embodiment of a battery module provided by the utility model;

[0030] Figure 4 A schematic diagram of the exploded structure of a battery pack of an embodiment of a battery module provided by the utility model;

[0031] Figure 5This is a schematic structural diagram of a mounting frame and a circuit board of an embodiment of a battery module provided by the utility model.

[0032] Description of Figure Numbers:

[0033] 1-box assembly; 11-box; 12-cover; 121-first mounting part; 122-second mounting part; 13-cavity; 21-mounting frame; 211-mounting slot; 212-limiting structure; 22-circuit board; 3-battery pack; 31-battery cell; 32-first limiting plate; 321-groove; 33-second limiting plate; 4-conductive connecting row; 5-insulating layer; 6-shock-absorbing layer; 7-temperature sensor.

[0034] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0038] The utility model provides a battery module.

[0039] See also Figures 1 to 5 In one embodiment of the utility model, the battery module includes a box assembly 1, a mounting frame 21 and a circuit board 22. The box assembly 1 includes a box 11 and a cover 12. The box 11 is connected to the cover 12 and encloses a cavity 13. A plurality of cells 31 are arranged at intervals in the cavity 13. The cavity 13 is used to fill the heat-conducting potting liquid. The mounting frame 21 is connected to the cover 12 or the box 11, and the circuit board 22 is connected to the mounting frame 21. There is a gap between the circuit board 22 and the cells 31. Each cell 31 is electrically connected to the circuit board 22.

[0040] By pouring heat-dissipating insulating liquid into the cavity 13 surrounded by the box body 11 and the cover body 12, the heat-dissipating insulating glue is used to ensure good heat dissipation effect of the battery cell 31 when the battery cell 31 has high density and high heat generation; at the same time, since the battery cells 31 are arranged at intervals, in the case of uncontrolled heat generation of a certain battery cell 31, it can also prevent heat diffusion from spreading to adjacent battery cells 31, providing good protection; by arranging a mounting frame 21 for mounting the circuit board 22, a spacing can be set between the circuit board 22 and the battery cell 31 to prevent the circuit board 22 from being attached to the outer surface of the battery cell 31, and the heat dissipation efficiency of the circuit board 22 and the battery cell 31 can be improved at the same time.

[0041] In order to improve the energy density of the battery module, the battery cell 31 adopts a square battery cell 31, which is convenient for the square battery cells 31 to be arranged in high density in the cavity 13, thereby improving the energy density of the battery module. There is a gap between adjacent battery cells 31, and the width of the gap ranges from 1mm to 5mm, so as to ensure that the adjacent battery cells 31 can dissipate heat through the gap, thereby improving the heat dissipation efficiency of the battery module. The thermal conductive potting liquid can adopt a thermal conductive potting glue, which is a special sealant. It not only has the bonding, sealing, fixing and other functions of general sealants, but also has good thermal conductivity, which can effectively guide the heat generated inside the device; and it can not only fix the battery cell 31, but also improve the heat dissipation efficiency of the battery module. At the same time, the thermal conductive potting glue has good electrical insulation performance after curing, which can provide electrical protection for the battery cell 31. And the thermal conductive potting glue can be disassembled after curing, which is convenient for the repair and maintenance of the battery module; the elastomer formed after the thermal conductive potting glue is cured can provide good waterproof and shock resistance, protecting the battery cell 31 from environmental influences.

[0042] In one embodiment, the battery module further includes a collection component, which is electrically connected to the circuit board 22, and each battery cell 31 is electrically connected to the collection component, and the collection component is used to obtain the performance parameters of each battery cell 31. The performance parameters of the battery cell 31 are obtained by using the collection component, so that the circuit board 22 can obtain the state of charge of the power battery pack 3, for example, the terminal voltage and temperature of each battery in the electric vehicle storage battery pack 3, the current during charging and discharging, etc. are collected in real time. The circuit board 22 can adjust the voltage and current of charging and discharging of the battery cell 31 according to the performance parameters of the battery cell 31 obtained by the collection component, and the circuit board 22 is used to make each battery cell 31 reach a state of balanced charging and discharging, thereby preventing damage to the battery cell 31 due to overcharging or overdischarging, reducing the thermal runaway of the battery cell 31, and achieving stable charging and discharging of the battery cell 31, which is conducive to stable heat dissipation of the battery module. Among them, the circuit board can be used to run the BMS (Battery Management System) battery management system.

[0043] In one embodiment, the acquisition component includes a voltage sensor (not shown in the figure), a current sensor (not shown in the figure) and a temperature sensor 7. The voltage sensor is electrically connected to the battery cell 31 and the circuit board 22 respectively; the current sensor is electrically connected to the battery cell 31 and the circuit board 22 respectively; the temperature sensor 7 is arranged on the outer surface of the battery cell 31, and the temperature sensor 7 is electrically connected to the circuit board 22. The voltage value of the battery cell 31 is obtained by the voltage sensor, the current value of the battery cell 31 is obtained by the current sensor, and the temperature value of the outer surface of the battery cell 31 is obtained by the temperature sensor 7. The circuit board 22 should be provided with a data acquisition unit and a central control unit (CCU). The data of the data acquisition unit is collected and transmitted to the central control unit in real time. The central control unit evaluates the health status of the battery cell 31, balances and controls the charging and discharging process of the battery cell 31, predicts the life of the battery cell 31, and protects the battery cell 31 from adverse conditions according to the received data; by setting the circuit board and the acquisition component, it can ensure that the battery module operates under safe and stable conditions, prolong its service life, and improve energy utilization efficiency; make the battery module run more smoothly, and it cooperates with the heat dissipation insulating liquid to achieve heat dissipation, which can improve the heat dissipation efficiency of the battery module.

[0044] In one embodiment, the mounting frame 21 is provided with a mounting groove 211, a limiting structure 212 is provided in the mounting groove 211, the circuit board 22 is provided in the mounting groove 211, and the limiting structure 212 is used to limit the relative movement between the circuit board 22 and the mounting groove 211. The mounting frame 21 is detachably connected to the bottom wall or the cover body 12 of the box body 11 through a locking piece, and the mounting groove 211 is provided on the mounting frame 21, and the limiting structure 212 is provided in the mounting groove 211. By installing the circuit board 22 into the mounting groove 211, the mounting bracket is used to provide protection for the circuit board 22, and the limiting structure 212 is used to fix the circuit board 22. The limiting structure 212 includes a limiting protrusion, and a card hole corresponding to the limiting protrusion should be provided on the circuit board 22, and the limiting protrusion is inserted into the card hole. In addition, the mounting frame 21 is made of plastic material, which can reduce the heat transfer between the battery cell 31 and the circuit board 22. Meanwhile, the installation frame 21 can not only improve the installation stability of the circuit board 22, but also reduce the amount of heat dissipation insulating liquid poured into the cavity 13. The above-mentioned locking element can be a bolt or a screw.

[0045] In addition, the box body 11 and the cover body 12 are made of metal material, which may be a carbon steel plate; the outer surfaces of the box body 11 and the cover body 12 are frosted to form a protective layer to reduce the risk of scratches on the box body.

[0046] In one embodiment, a plurality of battery cells 31 are connected in series to form a battery pack 3; and the plurality of battery cells 31 are arranged along the width direction of the box. By connecting a plurality of battery cells 31 in series to form a battery pack 3, and the plurality of battery cells 31 are arranged along the width direction of the box, the demand for battery cell 31 modules of different specifications can be met by increasing or decreasing the number of battery cells 31, saving the time required for replacing battery cells 31 of different specifications, and improving production efficiency.

[0047] In one embodiment, the battery module includes a plurality of battery groups 3, which are arranged along the length direction of the box; the plurality of battery groups 3 are connected in series and electrically connected to the power device; the negative poles of adjacent battery groups 3 are located on the same side as the positive poles of another battery group 3. By providing a plurality of battery groups 3 and arranging the plurality of battery groups 3 along the length direction of the box, the demand for modules of battery cells 31 of different specifications can be met by increasing or decreasing the number of battery groups 3, saving the time required for replacing battery cells 31 of different specifications, and improving production efficiency. By making the negative poles of adjacent battery groups 3 and the positive poles of another battery group 3 located on the same side, it is convenient for adjacent battery groups 3 to be electrically connected through connecting wires.

[0048] In one embodiment, the battery module further includes a plurality of conductive connecting bars 4, at least one conductive connecting bar 4 is provided for each group of battery cells 31, and both ends of the conductive connecting bar 4 are electrically connected to adjacent battery groups 3. One end of the conductive connecting bar 4 is electrically connected to a group of battery groups 3, and the other end of the conductive connecting bar 4 is electrically connected to an adjacent battery group 3, wherein the conductive connecting bar 4 is locked with the battery group 3 by a locking piece, so that the battery groups 3 can be connected in series, and the conductive connecting bar 4 can be used to limit the position of the battery group 3. In addition, the conductive connecting bar 4 is made of aluminum, which is a good conductive and thermal conductive material. When it comes into contact with air, it will naturally form a dense oxide film, which can protect the conductive connecting bar 4 from further corrosion, thereby increasing the service life of the battery module.

[0049] In one embodiment, the battery pack 3 at the head end is electrically connected to the first pole of the circuit board 22, and the battery pack 3 at the end is connected to the positive or negative pole of the power device; the second pole of the circuit board 22 is connected to the other of the positive or negative poles of the power device. After connecting multiple battery packs 3 in series, the battery pack 3 at the head end is electrically connected to the first pole of the circuit board 22, the battery pack 3 at the end is connected to the positive or negative pole of the power device, and the second pole of the circuit board 22 is connected to the other of the positive or negative poles of the power device, wherein the first pole and the second pole can be the positive and negative poles of the circuit board 22.

[0050] In one embodiment, the battery pack 3 further includes a first limiting plate 32 and a second limiting plate 33, the first limiting plate 32 and the second limiting plate 33 are respectively extended in the width direction of the box, an arrangement space is formed between the first limiting plate 32 and the second limiting plate 33, and a plurality of battery cells 31 are arranged in the arrangement space; the first limiting plate 32 is detachably connected to the cover 12 and / or the box 11; the second limiting plate 33 is detachably connected to the cover 12 and / or the box 11. The first limiting plate 32 and the second limiting plate 33 are provided to limit and fix the battery cells 31, wherein the first limiting plate 32 and the second limiting plate 33 are respectively extended in the width direction of the box, and the first limiting plate 32 and the second limiting plate 33 are used to separate adjacent battery packs 3. The first limiting plate 32 and the second limiting plate 33 are detachably connected to the bottom wall of the box 11 or the cover 12 through a locking piece, which has the advantages of convenient disassembly and assembly and stable connection.

[0051] In one embodiment, a groove 321 is provided on one side of the first limiting plate 32; one end of the conductive connection row 4 is located in the groove 321 of one battery pack 3, and the other end of the conductive connection row 4 is located in the groove 321 of an adjacent battery pack 3. By providing the groove 321 on the first limiting plate 32 for installing the conductive connection row 4, the connection stability of the conductive connection row 4 can be improved, and the conductive connection row 4 can be positioned and installed conveniently. Specifically, the groove 321 is located on the side of the first limiting plate 32 close to the bottom wall of the box body 11; the groove 321 is formed by surrounding a plate, and the plate is used to abut against the bottom wall of the box body 11, and the groove 321 is located on both sides of the battery pack 3 along the width direction of the box body, and the mounting frame 21 is located between the grooves 321 on both sides.

[0052] In one embodiment, the second limit plate 33 of one battery pack 3 is fixedly connected to the first limit plate 32 of the adjacent battery pack 3. By fixing the second limit plate 33 of one battery pack 3 to the first limit plate 32 of the adjacent battery pack 3, the installation stability of the battery pack 3 can be improved. When the battery module is used in an electric vehicle, the battery module can adapt to bumpy driving and improve the safety of the battery module.

[0053] In one embodiment, the box body 11 is provided with a first mounting portion 121 and a second mounting portion 122, the first mounting portion 121 is used to mount a wireless communication device, and the second mounting portion 122 is used to mount a positioning device. The wireless communication device may use a Bluetooth module and / or a WiFi communication module, and the Bluetooth module or the WiFi communication module may be connected to an external electronic device to output the performance parameters of the battery module, or input a control instruction through an external electronic device to charge or discharge the battery pack 3. The positioning device may use a GPS module, and the GPS module may be used to locate the battery module; when the battery module is used in an electric vehicle, the GPS module may be used to locate the position of the electric vehicle.

[0054] In one embodiment, the battery module further includes an insulating layer 5, which is disposed on the inner wall of the box body 11 and / or the inner wall of the cover body 12. Since the box body 11 and the cover body are made of metal materials, the insulating layer 5 is disposed on the inner wall of the box body 11 to provide protection for the battery cell 31 and improve the safety performance of the battery module. Among them, the insulating layer 5 can be made of PC (polycarbonate) sheet. PC material is an excellent electrical insulating material with good heat resistance and high heat deformation temperature. It can be used at higher temperatures without deformation and can also be recycled and reused, which is conducive to environmental protection.

[0055] In one embodiment, the battery module further includes a shock absorbing layer 6, and both sides of the shock absorbing layer 6 are respectively in contact with adjacent battery cells 31. By providing the shock absorbing layer 6, shock absorption protection can be provided for the battery cells 31, thereby improving the safety performance of the battery module. The shock absorbing layer 6 can be made of shock absorbing cotton, which can absorb and disperse impact force, and effectively protect the battery cells 31 from vibration and impact.

[0056] In one embodiment, the battery module further includes an adhesive layer, and the adhesive layer is used to bond adjacent battery cells 31. The adhesive layer can be arranged between the battery cells 31, and the two sides of the adhesive layer are respectively bonded to the adjacent battery cells 31, and the thickness of the adhesive layer is equal to the width of the gap between the adjacent battery cells 31. Or the two sides of the shock absorbing layer 6 are respectively bonded to the adjacent battery cells 31 through the adhesive layer. Among them, the adhesive layer can be made of structural adhesive.

[0057] The technical solution of the utility model is to pour heat dissipation insulating liquid into the cavity 13 surrounded by the box body 11 and the cover body 12, and use heat dissipation insulating glue to ensure good heat dissipation effect of the battery cell 31 when the battery cell 31 has high density and high heat generation; at the same time, since the battery cells 31 are arranged at intervals, in the case of uncontrolled heat generation of a certain battery cell 31, it can also prevent heat diffusion from spreading to adjacent battery cells 31, providing good protection; by arranging a mounting frame 21 for mounting the circuit board 22, a spacing can be set between the circuit board 22 and the battery cell 31, so as to avoid the circuit board 22 being attached to the outer surface of the battery cell 31, and the heat dissipation efficiency of the circuit board 22 and the battery cell 31 can be improved at the same time.

[0058] The utility model also proposes an electric vehicle, which includes a battery module. The specific structure of the battery module refers to the above-mentioned embodiment. Since the electric vehicle adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0059] Electric vehicles include electric bicycles and electric motorcycles.

[0060] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A battery module, characterized in that: include: A box assembly, the box assembly comprising a box and a cover, the box and the cover are connected to form a cavity, a plurality of cells are arranged at intervals in the cavity; the cavity is used to be filled with a heat-conducting potting liquid; A mounting frame connected to the cover body or the box body; A circuit board is connected to the mounting frame; a spacing is provided between the circuit board and the battery cells; and each of the battery cells is electrically connected to the circuit board.

2. The battery module according to claim 1, characterized in that: The battery module further includes a collection component, which is electrically connected to the circuit board, and each of the battery cells is electrically connected to the collection component, respectively, and the collection component is used to obtain performance parameters of each of the battery cells.

3. The battery module according to claim 2, characterized in that: The acquisition component includes a voltage sensor, a current sensor and a temperature sensor. The voltage sensor is electrically connected to the battery cell and the circuit board respectively; the current sensor is electrically connected to the battery cell and the circuit board respectively; the temperature sensor is arranged on the outer surface of the battery cell, and the temperature sensor is electrically connected to the circuit board.

4. The battery module according to claim 1, characterized in that: The mounting frame is provided with a mounting groove, a limiting structure is provided in the mounting groove, the circuit board is arranged in the mounting groove, and the limiting structure is used to limit the relative movement between the circuit board and the mounting groove.

5. The battery module according to any one of claims 1 to 4, characterized in that: A plurality of battery cells are connected in series to form a battery pack; the plurality of battery cells are arranged along the width direction of the box; and / or, The battery module comprises a plurality of battery groups, and the plurality of battery groups are arranged along the length direction of the box; the plurality of battery groups are connected in series and electrically connected to the power device; and / or; The battery module further comprises a plurality of conductive connection bars, one group of battery cells is provided with at least one conductive connection bar, and both ends of the conductive connection bar are respectively electrically connected to adjacent battery groups; and / or, The negative terminals of adjacent battery packs are located on the same side as the positive terminals of another battery pack; and / or, The battery pack at the front end is electrically connected to the first pole of the circuit board, and the battery pack at the rear end is connected to the positive pole or negative pole of the power device; the second pole of the circuit board is connected to the other of the positive pole or negative pole of the power device.

6. The battery module according to claim 5, characterized in that: The battery pack also includes a first limit plate and a second limit plate, which are respectively extended along the width direction of the box body, and an arrangement space is formed between the first limit plate and the second limit plate, and a plurality of battery cells are arranged in the arrangement space; the first limit plate is detachably connected to the cover body and / or the box body; the second limit plate is detachably connected to the cover body and / or the box body.

7. The battery module according to claim 6, characterized in that: A groove is provided on one side of the first limiting plate; one end of the conductive connecting row is located in the groove of a group of battery packs, and the other end of the conductive connecting row is located in the groove of an adjacent battery pack; and / or, The second limiting plate of one battery pack is fixedly connected to the first limiting plate of an adjacent battery pack.

8. The battery module according to any one of claims 1 to 4, characterized in that: The box body is provided with a first mounting portion and a second mounting portion, wherein the first mounting portion is used for mounting a wireless communication device, and the second mounting portion is used for mounting a positioning device.

9. The battery module according to any one of claims 1 to 4, characterized in that: The battery module further comprises an insulating layer, wherein the insulating layer is arranged on the inner wall of the box body and / or the inner wall of the cover body; and / or, The battery module further comprises a shock absorbing layer, two sides of which are respectively in contact with adjacent battery cells; and / or, The battery module further comprises an adhesive layer, and the adhesive layer is used to bond adjacent battery cells.

10. An electric vehicle, characterized in that: A battery module comprising the battery module as claimed in any one of claims 1 to 9.

Images