CN219843102U - Battery module and vehicle - Google Patents

Abstract

The utility model provides a battery module and a vehicle, wherein the battery module comprises a shell, and a battery cell group and a pressing plate which are accommodated in the shell, wherein the battery cell group comprises a plurality of battery cells which are arranged side by side, one end of the battery cell group is propped against the inner wall of the shell along the arrangement direction of the plurality of battery cells, the other end of the battery cell group is propped against the pressing plate, and the pressing plate can slide relative to the shell along the arrangement direction of the plurality of battery cells; the battery module further comprises a monitor and a motor, the monitor is used for monitoring the state of the battery cell group, the motor is fixed on the shell and is in transmission connection with the pressing plate, and the motor is used for receiving the state of the battery cell obtained by the monitor and moving the pressing plate to adjust the pressure born by the battery cell group. According to the battery module, the motor, the pressing plate and the monitor are arranged, so that the battery cell group is always subjected to constant pretightening force in the charging and discharging process, the influence of excessive pressure fluctuation on the battery cell on the internal structure and state of the battery cell is avoided, the aging of the battery cell is slowed down, and the performance and service life of the battery module are improved.

Description

Battery module and vehicle

Technical Field

The utility model relates to the technical field of power batteries, in particular to a battery module and a vehicle.

Background

The battery module is formed by combining a plurality of parallel or serial electric cores, and can provide all or main power sources for the vehicle through continuous discharge. The battery module is used as a key component of the electric automobile, and the performance and the service life of the battery module are very important.

The conventional battery module generally restrains the battery cell group at a fixed position in terms of structure and gives a certain pretightening force. The cells may expand or contract after multiple charge and discharge cycles. Because the relative positions of the battery cells are fixed, the battery cells may be further squeezed or tend to recover, and the stress of the battery cells is changed. Under the condition that the stress fluctuation of the battery cell is too large, the internal structure and state of the battery cell can be changed, so that the aging of the battery cell is accelerated, and the performance and the service life of the battery module are influenced.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present utility model is directed to a battery module and a vehicle, so as to slow down the aging of the battery cells, and improve the performance and service life of the battery module.

In a first aspect, the utility model provides a battery module, comprising a housing, and a battery cell group and a pressing plate which are accommodated in the housing, wherein the battery cell group comprises a plurality of battery cells which are arranged side by side, one end of the battery cell group is propped against the inner wall of the housing along the arrangement direction of the plurality of battery cells, the other end of the battery cell group is propped against the pressing plate, and the pressing plate can slide relative to the housing along the arrangement direction of the plurality of battery cells; the battery module further comprises a monitor and a motor, the monitor is used for monitoring the state of the battery cell group, the motor is fixed on the shell and is in transmission connection with the pressing plate, and the motor is used for receiving the state of the battery cell obtained by the monitor and moving the pressing plate to adjust the pressure born by the battery cell group.

The battery module is used for providing electric energy by arranging a plurality of electric cores side by side. The shell is arranged to accommodate each cell. Meanwhile, one end of the battery cell group is propped against the shell, and the other end of the battery cell group is propped against the pressing plate, so that the battery cell group is subjected to certain pretightening force, and poor connection caused by relative movement between the battery cells is avoided. The battery module is also connected with the shell in a sliding way, and is provided with the motor in transmission connection with the pressing plate, so that the pressing plate can move along the arrangement direction of the battery cells under the driving force provided by the motor, and the pressure born by the battery cell group can be changed.

Meanwhile, the utility model also monitors the state of the battery cell group in real time by arranging the monitor, and transmits the state signal of the battery cell group obtained by monitoring to the motor. The motor adjusts the position of the pressing plate based on the current state of the battery cell group so as to adjust the pressure born by the battery cell group, and the situation that the battery cell is excessively extruded or the pretightening force is too small to cause that the battery cell cannot be fixed is avoided, so that the battery cell group always receives a constant pretightening force in the life cycle of the battery cell group. It can be understood that the relative position between the battery cells can be adjusted according to the current state in the charging and discharging process of the battery cells, so that the battery cell group is always subjected to constant pretightening force, the structure and the state in the battery cells are prevented from being influenced by overlarge pressure fluctuation of the battery cells, the aging of the battery cells is slowed down, and the performance and the service life of the battery module are improved.

In one embodiment, the monitor is configured as a pressure sensor for monitoring the pressure applied to the cell stack along the direction of arrangement of the cells.

In this embodiment, the monitor is configured as a pressure sensor and is used to monitor the pressure applied to the cell group along the arrangement direction of the cells. When the battery cell charges and expands or discharges and contracts to enable the reaction force of the battery cell group to be correspondingly increased or correspondingly reduced by the pressing plate, the pressure sensor obtains the pressure signal and transmits the pressure signal to the motor, and the motor controls the pressing plate to move a preset displacement in a direction away from or close to the battery cell group, so that the pressure of the battery cell group is adjusted to a preset pretightening force.

In one embodiment, the monitor is a battery capacity monitor, the battery capacity monitor is used for monitoring the residual capacity of the battery cell group, the motor converts the received residual capacity of the battery cell group into a preset displacement, and the pressing plate is moved based on the preset displacement to adjust the pressure applied to the battery cell group.

In this embodiment, the monitor is used to monitor the remaining capacity of the cell stack by setting the monitor to be a battery capacity monitor. Based on the theoretical thickness that the residual capacity of each type electric core all has its correspondence, the motor converts into the displacement volume of predetermineeing according to the residual capacity signal of electric core group who receives, adjusts the clamp plate to corresponding position simultaneously to make electric core actual thickness adjustable to theoretical thickness, and then adjust the pressure that electric core group received to the pretightning force of predetermineeing.

In one embodiment, the battery module further includes a thickness sensor for measuring the length of the battery cell group along the arrangement direction of the battery cells so as to determine whether the battery cell group is excessively expanded or excessively contracted.

In this embodiment, through setting up thickness inductor in the battery module to be used for the length of real-time supervision electric core group along electric core range direction, with judging whether electric core group excessively expands or excessively contracts, be convenient for realize unusual early warning to electric core, avoid the incident emergence.

In one embodiment, the battery cell group further includes a heat dissipation plate, and the heat dissipation plate is disposed between at least two adjacent battery cells and is used for dissipating heat from the battery cell group.

In this embodiment, the heat dissipation plate is disposed in the battery cell group to separate at least two adjacent battery cells, and is used to dissipate heat of the battery cell group, so as to avoid the heat generated by the battery cells from concentrating to affect the performance of the battery cells.

In one embodiment, the pressing plate comprises a base and a plurality of supporting parts which are arranged at intervals, wherein the supporting parts are fixed on the base and are positioned on one side of the base close to the battery cell group, the supporting parts are supported by the battery cell group, and gaps between the supporting parts are used for assisting heat dissipation of the battery cell group.

In this embodiment, the base is disposed in the pressing plate to support the supporting portion, and the supporting portion is disposed on a side of the base, which is close to the battery cell group, so as to achieve supporting with the battery cell. Based on the gaps among the abutting parts, the battery cell group can be used for assisting in heat dissipation.

In one embodiment, the battery module further comprises a guide member fixed to the housing, the pressing plate comprises a sliding portion matched with the guide member, and the pressing plate is slidably connected to the housing through the sliding portion.

In this embodiment, the guide member is disposed in the battery module, and the sliding portion is disposed in the pressing plate, and the guide member is slidably coupled with the sliding portion in cooperation, so that the guide member can be used to guide the pressing plate to reciprocate linearly toward the battery cell group.

In one embodiment, the guide is provided as a guide rod, the sliding portion is provided with a through hole, and the guide rod passes through the through hole to realize sliding connection of the guide and the pressing plate.

In the embodiment, the guide piece is arranged as the guide rod, the through hole is correspondingly formed in the sliding part, and meanwhile, the guide rod penetrates through the through hole to realize sliding connection of the guide piece and the pressing plate, so that the structures of the guide piece and the pressing plate are simplified.

In one embodiment, the guide is provided as a guide rail, the sliding portion is provided as a slider, and the slider extends into the guide rail to achieve sliding connection of the guide with the platen.

In the embodiment, the guide piece is arranged as the guide sliding rail, the sliding part is correspondingly arranged as the sliding block, and the sliding block extends into the guide sliding rail to realize the sliding connection of the guide piece and the pressing plate, so that the reliability of the sliding connection of the guide piece and the pressing plate is improved.

In one embodiment, the number of the guide members is plural, the plurality of guide members are distributed at intervals on the periphery of the battery cell group, the number of the sliding parts is plural, and each sliding part slides in cooperation with one guide member so as to relatively equalize the pressure applied to the battery cell group.

In this embodiment, by arranging a plurality of guide members and a plurality of sliding portions, the guide members are uniformly distributed on the periphery of the battery cell group, and each sliding portion is matched with one guide member to slide, so that the battery cell group is subjected to relatively balanced pressure, and the structure of the battery cell is prevented from being damaged due to concentrated stress.

In one embodiment, the guide is of unitary construction with the housing.

In this embodiment, through establishing guide and casing as an organic whole structure to be used for saving space, and then can increase the density that the electric core was arranged, improve battery module's energy density.

In a second aspect, the present utility model provides a vehicle comprising a body and a battery module as in any of the embodiments described above, the battery module being secured to the body for powering the body.

It will be appreciated that the vehicle of the second aspect of the present utility model also has improved performance and lifetime due to the use of the battery module provided in the first aspect of the present utility model.

Drawings

FIG. 1 is a schematic view of a vehicle according to an embodiment of the present utility model;

fig. 2 is a schematic plan view illustrating a battery module according to an embodiment of the present utility model;

fig. 3 is a schematic plan view illustrating a battery module according to another embodiment of the present utility model;

fig. 4 is a schematic plan view illustrating a battery module according to another embodiment of the present utility model;

FIG. 5 is a schematic view of one side of a platen according to an embodiment of the present utility model;

FIG. 6 is a schematic view of another side of a pressure plate according to an embodiment of the present utility model;

FIG. 7 is a schematic view of a guide in an embodiment of the utility model;

fig. 8 is a schematic structural view of a pressure plate according to another embodiment of the present utility model.

Reference numerals: 200-vehicle; 201-vehicle body; 100-battery module; 10-a housing; 11-sidewalls; 11 a-a first sidewall; 11 b-a second sidewall; 12-a bottom plate; 20-cell groups; 21 cells; 30-pressing plates; 31-a base; 32-a holding part; 33-a sliding part; 331-a through hole; 332-a slider; 40-motor; 50-a pressure sensor; a 60-thickness sensor; 70-a heat dissipation plate; 80-a guide; 81-a guide bar; 82-guiding slide rail.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

The following description of the embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the utility model may be practiced. The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated. Directional terms, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc., in the present utility model are merely referring to the directions of the attached drawings, and thus, directional terms are used for better, more clear explanation and understanding of the present utility model, rather than indicating or implying that the apparatus or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and in the drawings are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprises," "comprising," "includes," "including," or "having," when used in this specification, are intended to specify the presence of stated features, operations, elements, etc., but do not limit the presence of one or more other features, operations, elements, etc., but are not limited to other features, operations, elements, etc. Furthermore, the terms "comprises" or "comprising" mean that there is a corresponding feature, number, step, operation, element, component, or combination thereof disclosed in the specification, and that there is no intention to exclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof.

Referring to FIG. 1, a schematic diagram of a vehicle 200 according to an embodiment of the present utility model is shown.

As shown in fig. 1, a vehicle 200 provided by the present utility model includes a vehicle body 201 and a battery module 100. The battery module 100 is accommodated in and fixed to the vehicle body 201, and is used for providing electric energy for the vehicle 200 to drive the vehicle 200 to run. It is understood that the battery module 100 of the present utility model may be applied to electric vehicles, including all-electric vehicles as well as hybrid vehicles.

Referring to fig. 2, a schematic plan view of a battery module 100 according to an embodiment of the utility model is shown.

As shown in fig. 2, the battery module 100 of the present utility model includes a case 10, a battery cell group 20, a pressing plate 30, and a motor 40. The casing 10 includes a plurality of side walls 11 and a bottom plate 12, wherein the plurality of side walls 11 are disposed around the periphery of the bottom plate 12, and a receiving space with a certain volume is formed by interconnecting the plurality of side walls 11 and the bottom wall, so as to receive and protect the battery cell group 20, the pressing plate 30 and the motor 40. The battery cell group 20 comprises a plurality of battery cells 21 which are arranged side by side, each battery cell 21 is connected in series or in parallel, and electrodes of each battery cell 21 are arranged away from the bottom plate 12 so as to lead out electric energy generated by the battery cell 21.

The side wall 11 includes a first side wall 11a and a second side wall 11b disposed opposite to each other. The cells 21 in the cell group 20 are arranged along the direction from the first side wall 11a to the second side wall 11b, and the pressing plate 30 is disposed between the cell group 20 and the second side wall 11b. One end of the battery cell group 20 is abutted against the inner wall of the shell 10, namely the first side wall 11a of the shell 10, and the other end is abutted against the pressing plate 30, so that the battery cell group 20 is subjected to a certain pretightening force, and poor connection and even failure of connection caused by relative movement between the battery cells 21 are avoided. Meanwhile, the pressing plate 30 is slidably connected with the housing 10, that is, the pressing plate 30 can slide relative to the housing 10 along the arrangement direction of the plurality of battery cells 21, so as to apply the same pretightening force to the battery cell group 20 in different states of the battery cell group 20. The motor 40 is located on the side of the pressing plate 30 facing away from the battery cell group 20 and is fixed to the second side wall 11b. The motor 40 is in driving connection with the platen 30 for providing a driving force to the platen 30.

The battery module 100 of the present utility model further includes a monitor (not shown) that may be electrically connected to the motor 40. In other embodiments, the monitor may be communicatively coupled to the motor 40, as the utility model is not limited in this regard. The monitor is used for monitoring the state of the battery cell group 20 in real time and transmitting the monitored signal to the motor 40. The motor 40 receives the state of the battery cell 21 monitored by the monitor, and simultaneously moves the position of the pressing plate 30 based on the current state of the battery cell group 20 to adjust the pressure applied to the battery cell group 20, so as to avoid the situation that the battery cell 21 is excessively extruded or the pre-tightening force is too small to be fixed, so that the battery cell group 20 is always subjected to a constant pre-tightening force in the life cycle.

It can be appreciated that, in the battery module 100 of the present utility model, the relative positions of the battery cells 21 can be adjusted according to the current state during the charge and discharge of the battery cells 21, so that the battery cell group 20 is always subjected to a constant pretightening force, and further, the influence of excessive pressure fluctuation of the battery cells 21 on the internal structure and state of the battery cells 21 is avoided, thereby slowing down the aging of the battery cells 21, and improving the performance and service life of the battery module 100.

It should be noted that, in the above embodiment, the position of the motor 40 is described only as an example. In other embodiments, the motor 40 may not be accommodated in the housing 10, but may be disposed outside the housing 10, that is, only the driving connection between the motor 40 and the platen 30 is required.

In one embodiment, as shown in FIG. 3, the monitor is provided as a pressure sensor 50. The pressure sensor 50 may be located between the pressing plate 30 and the battery cell group 20, and the pressure sensor 50 may be used to monitor the pressure applied to the battery cell group 20 along the arrangement direction of the battery cells 21 in real time, and transmit the currently detected pressure signal to the motor 40. The pressure sensor 50 may be made of a pressure sensitive material to ensure the reliability of the pressure sensor 50.

It can be appreciated that the cells 21 may expand after multiple charging and discharging, so that the expansion force between the adjacent cells 21 correspondingly increases. That is, the expansion force applied to the pressing plate 30 by the cell group 20 increases, and the reaction force applied to the pressing plate 30 by the cell group 20 correspondingly increases. The pressure sensor 50 obtains the pressure signal and sends the pressure signal to the motor 40, and the motor 40 controls the pressing plate 30 to move in a direction away from the cell group 20 based on the pressure signal until the motor 40 controls the pressing plate 30 to stop moving when the pressure sensor 50 detects the pressure equal to the initial pre-tightening force again.

Shrinkage may occur after the cells 21 are charged and discharged for several times, so that the expansion force between the adjacent cells 21 is correspondingly reduced. That is, the expansion force applied by the cell stack 20 to the pressing plate 30 is reduced, and the reaction force applied by the cell stack 20 to the pressing plate 30 is correspondingly reduced. The pressure sensor 50 obtains the pressure signal and sends the pressure signal to the motor 40, and the motor 40 controls the pressing plate 30 to move in the direction towards the battery cell group 20 based on the pressure signal until the motor 40 controls the pressing plate 30 to stop moving when the pressure sensor 50 detects the pressure equal to the initial pre-tightening force again.

It should be noted that the position of the pressure sensor 50 in the above embodiment is described only as an example, and does not represent the actual position of the pressure sensor 50. That is, in other embodiments, the pressure sensor 50 may be disposed between two adjacent cells 21, or may be disposed between the first sidewall 11a and the cell group 20, and pressure monitoring of the cell group 20 may be achieved. And the number of the pressure sensors 50 may be one or more according to the actual circumstances, which is not particularly limited in the present utility model.

In one embodiment, the monitor is provided as a battery capacity monitor. The battery capacity monitor may be electrically connected to each electrode of the battery cell 21 through a sampling harness, so as to detect the voltage of the battery cell 21, so as to determine the remaining capacity of the battery cell group 20. The battery capacity monitor may be electrically connected to the motor 40 to transmit the signal to the motor 40, where the motor 40 converts the received residual capacity of the battery cell set 20 into a preset displacement, and moves the pressing plate 30 based on the preset displacement to adjust the pressure applied to the battery cell set 20.

In the present embodiment, the remaining capacity of each cell 21 has a corresponding theoretical thickness value. The residual capacity signal of the battery cell group 20 received by the motor 40 is converted into a theoretical thickness signal, and the motor 40 obtains a preset displacement according to the initial thickness difference value between the theoretical thickness and the battery cell group 20 along the arrangement direction. Then, the pressing plate 30 is adjusted to a corresponding position, so that the actual thickness of the battery cell 21 can be adjusted to a theoretical thickness, and the pressure applied to the battery cell group 20 is adjusted to a preset pretightening force, so that the constant stress of the battery cell group 20 is ensured.

As shown in fig. 4, in one embodiment, the battery module 100 further includes thickness sensors 60, and the thickness sensors 60 are disposed at opposite ends of the pressing plate 30 along the direction perpendicular to the arrangement direction of the battery cells 21 and are disposed near one side of the battery cell group 20 for measuring the length of the battery cell group 20 along the arrangement direction of the battery cells 21. It can be appreciated that in the present embodiment, the thickness sensor 60 can monitor the length of the cell set 20 along the arrangement direction of the cells 21 in real time, so as to determine whether the cell set 20 is excessively expanded or excessively contracted. The thickness sensor 60 may also be electrically connected to an alarm system of the vehicle 200, so as to transmit the abnormal condition of the battery cell 21 to the alarm system, so as to realize abnormal early warning on the battery cell 21 and avoid safety accidents.

It should be noted that, in other embodiments, the thickness sensor 60 may be disposed on the side of the pressing plate 30 close to the second side wall 11b or on the side of the second side wall 11b facing the cell group 20, and the length of the cell group 20 along the arrangement direction may also be obtained by measuring the distance between the second side wall 11b and the pressing plate 30.

As shown in fig. 4, in one embodiment, the battery cell group 20 further includes a heat dissipation plate 70, where the heat dissipation plate 70 is disposed between two adjacent battery cells 21, and is further disposed between the first side wall 11a and the battery cell group 20 and between the second side wall 11b and the battery cell group 20 to separate at least two adjacent battery cells 21.

It is understood that the heat dissipation plate 70 may be configured as an air cooling plate or a liquid cooling plate. The heat dissipation plate 70 includes a plurality of channels, so that cold air or cooling liquid can pass through the heat dissipation plate, and heat generated by the battery cell 21 is further taken away, so that the performance of the battery cell 21 is prevented from being influenced by heat concentration. In one embodiment, the heat dissipation plate 70 may be made of a material having a certain elasticity, and may be used to provide a certain reserved expansion space for the battery cells 21.

Please refer to fig. 5 and 6 in combination with a schematic structural diagram of a pressure plate 30 according to an embodiment of the present utility model.

As shown in fig. 5 and 6, in one embodiment, the pressing plate 30 includes a base 31 and a plurality of holding portions 32 arranged at intervals, where the holding portions 32 are fixed on the base 31 and disposed on a side of the base 31 near the cell set 20, and the holding portions 32 are held against the cell set 20.

It will be appreciated that the abutment portion 32 is configured to abut against the battery cell group 20 to achieve the pre-tightening force. Based on the interval arrangement of the abutting parts 32, gaps are formed, and can be used as air cooling channels so as to assist the heat dissipation of the battery cell group 20.

As shown in fig. 4 and 6, in one embodiment, the battery module 100 further includes a guide 80, the guide 80 is fixed to the case 10, the pressing plate 30 includes a sliding portion 33 (please refer to fig. 6) engaged with the guide 80, and the pressing plate 30 is slidably coupled to the case 10 through the sliding portion 33.

It will be appreciated that in this embodiment, the guide 80 cooperates with the sliding portion 33 to achieve a sliding connection, so that the guide 80 can be used to guide the platen 30 to make a reciprocating linear movement toward the cell group 20.

Specifically, in the embodiment shown in fig. 4 and 6, the guide 80 is provided as a guide rod 81. The number of the guide rods 81 is two, and the two guide rods 81 are respectively arranged on two opposite sides of the cell group 20 along the direction perpendicular to the arrangement direction of the cells 21. The sliding portion 33 is provided with through holes 331, and the number of through holes 331 is two correspondingly. Each guide bar 81 passes through one of the through holes 331 to achieve a sliding connection of the guide 80 with the pressing plate 30. The two guide rods 81 can balance the stress of the battery cell group 20 while guiding the pressing plate 30 to move, so that uneven stress of the battery cell group 20 is avoided. It will be appreciated that this design is simple and thus simplifies the process of making the guide 80 and the platen 30.

As shown in fig. 7 and 8, in one embodiment, the guide 80 is provided as a guide rail 82 and the sliding portion 33 is provided as a slider 332. The number of the guide slide rails 82 and the number of the slide blocks 332 are two, the guide slide rails 82 are respectively arranged at two opposite sides of the battery cell group 20 along the direction vertical to the arrangement direction of the battery cells 21, and the slide blocks 332 are respectively arranged at two opposite ends of the pressing plate 30 along the direction vertical to the arrangement direction of the battery cells 21. The slider 332 extends into the guide rail 82 to effect a sliding connection of the guide 80 with the platen 30.

It can be appreciated that in this embodiment, the guide rail 82 and the slider 332 are not only simple in structure, but also the slider 332 extends into the guide rail 82 to realize the sliding connection between the guide 80 and the platen 30, so that the reliability of the sliding connection between the guide 80 and the platen 30 can be improved.

It should be noted that in the above embodiment, the number, positions and structures of the guide 80 and the sliding portion 33 are described as examples only. In other embodiments, the number of guides 80 may be plural, and the number of sliding portions 33 may be plural. The plurality of guide members 80 may be distributed at intervals on the periphery of the battery cell group 20, and each sliding portion 33 slides in cooperation with one guide member 80, so that the pressure applied to the battery cell group 20 is relatively balanced, and the structure of the battery cell 21 is prevented from being damaged due to concentrated stress.

In one embodiment, the guide 80 is of unitary construction with the housing 10. It can be appreciated that in the present embodiment, the guide member 80 and the housing 10 are integrally formed, that is, the sliding groove or the sliding rod is designed by using the side wall 11 of the housing 10 to form the guide sliding rail 82 and the guide rod 81, and the design can optimize the layout of each component in the housing 10 to save space, so that the arrangement density of the battery cells 21 can be increased, and the energy density of the battery module 100 can be improved.

It should be appreciated that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or quantity. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more, unless explicitly defined otherwise.

In the description of the present specification, reference to the terms "some embodiments," "illustrative embodiments," "examples," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiments or examples is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments.

It is to be understood that the utility model is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims. Those skilled in the art will recognize that the full or partial flow of the embodiments described above can be practiced and equivalent variations of the embodiments of the present utility model are within the scope of the appended claims.

Claims (10)

1. The battery module is characterized by comprising a shell, and a battery cell group and a pressing plate which are accommodated in the shell, wherein the battery cell group comprises a plurality of battery cells which are arranged side by side, one end of the battery cell group is propped against the inner wall of the shell along the arrangement direction of the battery cells, the other end of the battery cell group is propped against the pressing plate, and the pressing plate can slide relative to the shell along the arrangement direction of the battery cells;

the battery module further comprises a monitor and a motor, the monitor is used for monitoring the state of the battery cell group, the motor is fixed on the shell and is in transmission connection with the pressing plate, and the motor is used for receiving the state of the battery cell obtained by monitoring the monitor and moving the pressing plate to adjust the pressure born by the battery cell group.

2. The battery module according to claim 1, wherein the monitor is provided as a pressure sensor for monitoring the pressure applied to the cell group in the arrangement direction of the cells.

3. The battery module according to claim 1, wherein the monitor is a battery capacity monitor for monitoring a remaining capacity of the battery cell pack, the motor converts the received remaining capacity of the battery cell pack into a preset displacement amount, and the pressing plate is moved based on the preset displacement amount to adjust a pressure to which the battery cell pack is subjected.

4. The battery module according to any one of claims 1 to 3, further comprising a thickness sensor for measuring a length of the cell group in the cell arrangement direction to determine whether the cell group is excessively expanded or excessively contracted.

5. The battery module of any one of claims 1-3, wherein the cell stack further comprises a heat sink disposed between at least two adjacent cells, the heat sink configured to dissipate heat from the cell stack.

6. The battery module according to any one of claims 1-3, wherein the pressing plate comprises a base and a plurality of supporting parts arranged at intervals, the supporting parts are fixed on the base and are positioned on one side of the base close to the battery cell group, the supporting parts support the battery cell group, and gaps between the supporting parts are used for assisting heat dissipation of the battery cell group.

7. The battery module according to any one of claims 1 to 3, further comprising a guide member fixed to the case, wherein the pressing plate includes a sliding portion engaged with the guide member, and wherein the pressing plate is slidably coupled to the case through the sliding portion.

8. The battery module according to claim 7, wherein the guide is provided as a guide rod, the sliding portion is provided with a through hole, and the guide rod passes through the through hole to achieve sliding connection of the guide with the pressing plate; or alternatively, the first and second heat exchangers may be,

the guide piece is arranged to be a guide sliding rail, the sliding part is arranged to be a sliding block, and the sliding block stretches into the guide sliding rail to realize sliding connection of the guide piece and the pressing plate.

9. The battery module according to claim 7, wherein the number of the guide members is plural, the plurality of guide members are spaced apart from the periphery of the battery cell group, the number of the sliding portions is plural, and each sliding portion slides in cooperation with one of the guide members to relatively equalize the pressure applied to the battery cell group.

10. A vehicle comprising a body and a battery module according to any one of claims 1 to 9, the battery module being secured to the body for powering the body.