CN219626736U - Battery cell - Google Patents

Abstract

The utility model relates to the field of batteries, and particularly provides a battery which comprises a shell, and a battery core module, a circuit assembly module and a DC/DC converter which are positioned in the shell, wherein the battery core module and the circuit assembly module are respectively arranged at two sides of the DC/DC converter; and a cooling channel is formed between the cell module and the DC/DC converter, and a medium inlet and a medium outlet which are respectively communicated with two ends of the cooling channel are formed on the shell. The battery provided by the utility model is internally provided with the modularized arrangement and the optimized arrangement structure, so that the influence of the heat of the DC/DC converter on the battery core module is blocked, the DC/DC converter and the battery core module are well radiated by a simplified space structure, and the radiating performance of the battery is ensured, so that the problem that the battery provided with the DC/DC converter in the prior art is difficult to radiate and easily affects the normal operation of the battery core and is easy to damage is solved.

Description

Battery cell

Technical Field

The utility model relates to the technical field of batteries, and particularly provides a battery.

Background

On many devices, different operating systems may need to use different voltages, and currently, a dual-voltage battery is derived, that is, two voltages are output on one battery pack, and the two voltages are output and managed by one battery management system. DC/DC converters are typically provided on such batteries. The DC/DC converter has larger volume and more heat generation, and the heat dissipation of the battery core is also an important factor for ensuring the normal use of the battery. Therefore, when the DC/DC converter is configured in the battery, how to ensure the overall heat dissipation performance of the battery, prevent the battery core from being damaged by heat, and are important factors for ensuring the normal use of the battery.

Disclosure of Invention

In view of the above, the embodiments of the present utility model are directed to providing a battery, in which the battery is modularized and arranged in an optimized structure, so that the influence of the heat of the DC/DC converter on the battery core module is blocked, and the DC/DC converter and the battery core module are well cooled by a simplified space structure, so that the heat dissipation performance of the battery is ensured, and the problem that the battery provided with the DC/DC converter in the prior art is difficult to dissipate heat and easily affects the normal operation of the battery core and is easy to be damaged is solved.

The utility model provides a battery which is characterized by comprising a shell, and a battery core module, a circuit assembly module and a DC/DC converter which are positioned in the shell, wherein the battery core module and the circuit assembly module are respectively arranged at two sides of the DC/DC converter; and a cooling channel is formed between the battery cell module and the DC/DC converter, and a medium inlet and a medium outlet which are respectively communicated with two ends of the cooling channel are formed on the shell.

In a possible embodiment, a cell radiator is further provided in the housing, the cell radiator being connected to a side of the cell module close to the DC/DC converter, the cooling channel being located between the cell radiator and the DC/DC converter.

In one possible embodiment, the cell heat sink and the DC/DC converter have a first space therebetween, the first space forming the cooling channel.

In one possible embodiment, a medium pressurizing member is further provided, and the medium pressurizing member is provided at any one of the cooling channel, the medium inlet and the medium outlet; and/or the inlet end and the outlet end of the cooling channel are provided with air guide structures.

In one possible implementation manner, the battery cell module is arranged in a shell cavity of the inner shell, the battery cell radiator is provided with a cover plate for sealing or covering a cavity opening of the shell cavity and radiating fins arranged on the cover plate and positioned outside the shell cavity, and the cooling channel, the DC/DC converter and the circuit module are positioned outside the inner shell.

In one possible embodiment, the DC/DC converter is connected to a side of the insulating support, which is close to the cooling channel, and the circuit assembly module is disposed on a side of the insulating support, which is far away from the cooling channel, and the outer peripheral wall of the insulating support is connected to the inner wall of the housing or has a space or sealing connection.

In one possible implementation manner, the outer shell comprises a top cover and a bottom cover which are buckled with each other, the insulating support is plate-shaped and is in sealing connection with the inner wall of the top cover so as to seal the circuit assembly module in the cover cavity of the top cover, the cell module is arranged in the shell cavity of the inner shell, and the bottom end of the inner shell is fixed in the cover cavity of the bottom cover.

In one possible embodiment, a thermal insulation layer is arranged between the battery cell module and the shell; or, a heat insulation layer is arranged between the battery core module and the DC/DC converter and between the battery core module and the casing.

In one possible embodiment, the cell module is disposed in an inner case, a second space is provided between an outer peripheral wall of the inner case and an inner peripheral wall of the outer case, the cooling channel is formed by a first space between the cell module and the DC/DC converter, and the second space is in communication with the first space; and/or a first heat conducting substance is filled between the bottom of the battery cell module and the inner shell, and a second heat conducting substance is filled between the battery cell module and the inner shell in the circumferential direction; and/or an insulating plate is arranged between the battery cell module and the inner shell; and/or a heat conduction insulating pad is laid between the bus plate of the battery core module and the battery core radiator.

In one possible embodiment, the cell module comprises an integrated cell composed of a plurality of cells connected in series, a part of the integrated cell forms a split cell block, a positive electrode of the split cell block forms a split positive electrode, and a voltage between the split positive electrode and a total negative electrode of the integrated cell is smaller than a voltage between the total positive electrode and the total negative electrode of the integrated cell.

In one possible embodiment, a battery management system is further provided, the battery management system including a first circuit board and a second circuit board, the first circuit board is connected to the side wall of the cell module or the inner shell through a bracket, and the second circuit board is connected to the side of the insulating bracket away from the DC/DC converter.

In one possible implementation manner, a bus plate of the battery cell module is laid above the integrated battery cell, and a split positive electrode bus bar connected with a positive electrode tab of the split battery cell block, a total positive electrode bus bar connected with a total positive electrode tab of the integrated battery cell and a total negative electrode bus bar connected with a total negative electrode tab of the integrated battery cell are arranged on the bus plate; and/or the circuit assembly module comprises a first switch arranged between the shunt anode and the total cathode, a second switch arranged between the total anode and the total cathode, a first voltage relay electrically connected with the first switch and a second voltage relay electrically connected with the second switch.

In one possible embodiment, a shunt is provided at both the total positive bus bar and the total negative bus bar; and/or a partition plate is arranged between the shunt cell block and the rest of the cells, and the shunt positive electrode bus bar is arranged on the bus plate at a position corresponding to the partition plate.

According to the battery provided by the utility model, the whole battery is equivalent to three modules including the battery module, the DC/DC converter and the circuit assembly module, and the battery is neat and clear in structure, convenient to arrange and favorable for heat dissipation. The battery core module and the circuit assembly module are respectively arranged at two sides of the DC/DC converter, meanwhile, a cooling channel is formed between the battery core module and the DC/DC converter, and a cooling medium flows through the cooling channel to take away heat in the battery, and particularly, the battery modules and the DC/DC converter at two sides of the channel are effectively cooled. Therefore, the battery provided by the utility model is arranged in a modularized manner, the battery core module and other modules are separated, the battery core module and the DC/DC converter are arranged close to the cooling channel, the heat dissipation structure is simplified and ingenious, and the heat influence of other components, namely the DC/DC converter and the circuit assembly module, on the battery core module is blocked, and the battery core module and the DC/DC converter are effectively dissipated, so that the two aspects are optimized and improved, the heat dissipation efficiency of the battery is effectively improved, and the heat dissipation performance and the service life of the battery are ensured; and the modularized arrangement combines the structural layout for simultaneously radiating two main heat generating modules through only one cooling channel, optimizes the structural arrangement in the battery, and ensures that the whole volume of the battery with the DC/DC converter is smaller than that of the battery in the prior art, occupies small space and is beneficial to arrangement.

Drawings

FIG. 1 is a schematic diagram showing the composition of a battery cell module and a battery according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram showing the composition of a battery cell module and a battery according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a heat sink for a battery cell according to an embodiment of the utility model;

FIG. 4 is a bottom view of the assembled top cover of the present utility model;

FIG. 5 is an overall schematic of a battery according to an embodiment of the present utility model;

FIG. 6 is a schematic diagram of a cooling channel according to an embodiment of the present utility model;

fig. 7 is a schematic diagram illustrating the composition of a battery cell module according to an embodiment of the utility model.

In fig. 1-7:

1. a top cover; 101. a media inlet; 102. a medium outlet; 2. a bottom cover; 3. an inner case; 4. a battery cell module; 41. an integrated cell; 42. a thermally conductive insulating pad; 43. a bus plate; 431. shunting an anode busbar; 432. a total positive bus; 433. a total negative bus bar; 434. a shunt; 5. a cell radiator; 51. a cover plate; 52. a heat radiation fin; 6. a DC/DC converter; 7. an insulating support; 8. a media pressurizing member; 9. a first circuit board; 10. a second circuit board; 11. a first voltage relay; 12. a second voltage relay; 13. a bracket; 14. and a cooling channel.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-7, the present utility model provides a battery having a housing, a cell module 4 within the housing, a circuit assembly module, and a DC/DC converter 6. The DC/DC converter 6 is used for making the cell module 4 have at least two voltage outputs, and the circuit assembly module is an integrated module of circuit components, so that each circuit component is integrated into a module, the whole is convenient to arrange, the whole battery is equivalent to three modules, the structure is neat and clear, the arrangement is convenient, and the heat dissipation is facilitated. The two modules of the cell module 4 and the circuit assembly module are respectively arranged at two sides of the DC/DC converter 6, for example, three modules are arranged in the height direction, so that the cell module 4 and the circuit assembly module are distributed above and below the DC/DC converter 6, meanwhile, a cooling channel 14 is formed between the cell module 4 and the DC/DC converter 6, a medium inlet 101 and a medium outlet 102 which are respectively communicated with two ends of the cooling channel 14 are formed on the shell, and a cooling medium flows into the cooling channel 14 from the medium inlet 101 and flows out through the medium outlet 102, so that heat in the battery is absorbed and taken away, and the battery is cooled and radiated.

So arranged, the cooling channel 14 separates the cell module 4 from the DC/DC converter 6, and the cell module 4 is separately located at one side of the cooling channel 14, which is equivalent to separating from other components, namely the DC/DC converter 6 and the circuit module, so that the influence of heat emitted by the circuit module and the DC/DC converter 6 on the cell module 4 can be effectively blocked; meanwhile, the cell module 4 and the DC/DC converter 6 are located at two sides of the cooling channel 14, so that the cell module 4 can be effectively cooled, the DC/DC converter 6 can be effectively cooled, the overall cooling efficiency and the cooling performance of the battery are improved, the problem that the battery with the DC/DC converter 6 is difficult to cool and the normal use of the battery is affected to cause damage is solved, the cooling efficiency of the battery with the DC/DC converter 6 is effectively improved, the cooling performance of the battery is ensured, the service life of the battery is ensured, the battery can be suitable for high-temperature environments, and the application performance is improved; and, cell module 4 and DC/DC converter 6 share a cooling channel 14, namely a cooling channel 14 dispels the heat for cell module 4 and DC/DC converter 6 simultaneously, and the structure is retrenched, can not obviously increase the battery volume for the battery does benefit to arrange on equipment, and has guaranteed again that cell module 4 and DC/DC converter 6 all dispel the heat effectively, has ensured the heat dispersion of battery.

Therefore, the battery provided by the utility model is arranged in a modularized manner, the battery core module and other modules are separated, the battery core module and the DC/DC converter are arranged close to the cooling channel, the heat dissipation structure is simplified and ingenious, the heat influence of other components, namely the DC/DC converter and the circuit assembly module, on the battery core module is blocked, and the battery core module and the DC/DC converter are effectively dissipated, so that the two aspects are optimized and improved, the heat dissipation efficiency of the battery is effectively improved, and the heat dissipation performance and the service life of the battery are ensured; and the modularized arrangement combines the structural layout for simultaneously radiating two main heat generating modules through only one cooling channel, optimizes the structural arrangement in the battery, and ensures that the whole volume of the battery with the DC/DC converter is smaller than that of the battery in the prior art, occupies small space and is beneficial to arrangement.

Further, a cell radiator 5 is disposed in the cell module 4, the cell radiator 5 is connected to the cell module 4 and is located on a side of the cell module 4 near the cooling channel 14 and is close to or in contact with the cooling channel 14, for example, the cell radiator 5 is located above the cells of the cell module 4, and the cooling channel 14 and the DC/DC converter 6 are located above the cell radiator 5 in sequence. In this way, the cell radiator 5 directly guides the heat of the cell to the cooling channel 14, reduces the thermal resistance between the cooling channel 14 and the cell, can effectively and efficiently radiate the cell, and effectively cools the cell module 4.

Typically, a heat sink is also provided or provided on the DC/DC converter 6, and the heat sink is also located on the side of the DC/DC converter 6 close to the cooling channel 14, in contact with the cooling channel 14. By the arrangement, heat of the DC/DC converter 6 can be directly exchanged with the cooling medium in the cooling channel 14, and heat dissipation is efficient.

The cooling channel 14 separates the cell radiator 5 of the cell module 4 and the radiator on the DC/DC converter 6, so that the mutual interference of two heat sources, especially the influence on the cell, can be isolated, the normal high-quality long-term use of the cell can be ensured, the effective heat dissipation of two heat generating components can be ensured, and the heat dissipation capacity of the battery can be improved.

The cell radiator 5 is provided with radiating fins 52, and the radiator of the DC/DC converter 6 can also be provided with fins, and the fins of the two radiators are arranged towards the cooling channel 14, so that the contact area with the cooling channel 14 is increased, and the radiating efficiency is enhanced.

The heat of the battery cell module is mainly generated by the battery cell, and the heat of the battery cell is mainly generated by the battery cell body and the electrode lugs, so in one embodiment, a heat dissipation piece for dissipating heat of the electrode lugs of the battery cell is further arranged between the battery cell heat radiator 5 and the battery cell. This radiating piece contacts with the utmost point ear, carries out effective heat dissipation to the utmost point ear, is located between utmost point ear and the electric core radiator 5 simultaneously, reduces the thermal resistance between utmost point ear and the electric core radiator 5, improves heat conductivility, gives electric core radiator 5 with heat transfer, then is absorbed by cooling channel 14, so sets up heat radiation structure, can very efficient dispel the heat to electric core module 4.

Specifically, the heat sink may be a thermally conductive insulating pad 42, such as a rubber pad, a silicone pad, or a thermally conductive silicone grease pad, or the like, laid over the tab, such as on the busbar 43. The thermally conductive and insulating pad 42 serves both thermal and insulating functions.

The cooling medium may be gas or liquid, and if the cooling medium is gas, the medium inlet 101 on the battery shell is an air inlet, the medium outlet 102 is an air outlet, and the medium inlet 101 needs to be communicated with an air source or the external atmosphere. If liquid, both the medium inlet 101 and the medium outlet 102 need to be in communication with a liquid source via a conduit.

Furthermore, a medium pressurizing member 8 is further disposed on the battery for pressurizing the cooling medium, so that the cooling medium continuously and stably flows through the cooling channel 14 at a relatively high speed, and heat of the battery is efficiently taken away, thereby realizing high-efficiency heat dissipation performance. The medium pressure increasing member 8 may be disposed at any one of the three positions of the cooling passage 14, the medium inlet 101, and the medium outlet 102.

In one embodiment, the cooling medium of the battery is a gas, which may be air-cooled, and the medium pressurizing member 8 is a fan. In a preferred construction, a fan is provided at the media inlet 101 and is attached to the housing for attachment, the fan being located within the housing. In the direction from the medium inlet 101 to the medium outlet 102, the projection of the fan, and the projections of the cell radiator 5 and the DC/DC converter 6 partially overlap; i.e. a local area of the fan is opposite the cell heat sink 5 and another local area coincides with the DC/DC converter 6. By such arrangement, the flow speed of the air flow entering the cooling channel 14 can be improved, the fan is arranged in the shell, the local area is opposite to the cell radiator 5 and the DC/DC converter 6, and the cell module 4 and the DC/DC converter 6 can be radiated, so that the heat radiation performance is further improved. Meanwhile, the heat dissipation structure of the battery is distributed in such a way that the battery cell module 4 and the DC/DC converter 6 share one heat dissipation fan, so that the heat dissipation performance is improved, meanwhile, the structural composition of the battery is simplified, and the defects of cost reduction and application arrangement caused by overlarge volume and complicated parts are avoided.

Air guiding structures may be provided at both the inlet and outlet ends of the cooling channel 14 to facilitate the flow of air entering from the medium inlet 101 along the cooling channel 14 and then out through the medium outlet 102 to prevent turbulence of the air flow. The air guide structure may be inclined plates provided on both sides in the width direction of the cooling passage (the inlet to the outlet is the length direction). The inclined plate means a plate body which is obliquely arranged with clamps in the length and width directions of the cooling channel 14, one side of the inclined plate is close to or in contact with the inner wall of the housing, the other side of the inclined plate is in contact with or close to the ends of the cell radiator 5 and the DC/DC converter 6, the inclined plate at the inlet end guides air flow from the medium inlet 101 into the cooling channel 14, and the inclined plate at the outlet end guides air flow from the cooling channel 14 to the medium outlet 102.

As shown in fig. 6, in the housing, the cell module 4 and the DC/DC converter 6 are arranged at intervals, for example with a first interval between the cell heat sink 5 and the DC/DC converter 6, which first interval forms a cooling channel 14, and the medium pressure increasing member 8 is a fan, which fan is connected to the inner wall of the housing at the medium inlet 101. Therefore, heat dissipation can be performed in an air cooling mode, components such as a liquid source and a pipeline are not required to be arranged, waterproof treatment is not required to be performed between the cooling channel 14 and the battery assembly, and the air cooling type solar cell module is simple in structure and convenient to apply.

The fixation of the DC/DC converter 6 and the circuit assembly module in the housing can be set as follows. As shown in fig. 1, 2 and 4, in one embodiment, an insulating bracket 7 is further disposed in the housing of the battery, and the insulating bracket 7 may be fixed in the housing by being connected to the inner wall of the housing, or of course, there may be a space between the insulating bracket 7 and the inner wall of the housing, and the insulating bracket 7 is fixed to the housing by other fasteners or connectors. The insulating support 7 is located at the side of the cooling channel 14 close to the DC/DC converter 6, spaced apart from the cell module 4. While the circuit assembly module is connected to the side of the insulating holder 7 remote from the cooling channel 14, and the DC/DC converter 6 is connected to the side of the insulating holder 7 close to the cooling channel 14. The arrangement is that the circuit assembly module and the battery cell module 4 are separated, the heat dissipation efficiency of the battery cell module 4 is further improved, the DC/DC converter 6 and the circuit assembly module are arranged in a concentrated mode, the occupied space of the wire harness or the circuit board in the shell is reduced, meanwhile, the wire harness or the circuit board and the circuit assembly module are arranged on the insulating support 7, the circuit assembly module is equivalent to the circuit assembly module, after all components in the DC/DC converter 6 and the circuit assembly module are fixed on the insulating support 7, the insulating support 7 is integrally installed in the shell of the battery to be fixed, and the battery cell is very convenient to assemble.

Heat dissipation is an important property of a battery, and water resistance is also an important property of a battery. If the waterproof performance is good, the use of the battery is more guaranteed, the waterproof battery is also more suitable for various equipment and places, the application range is widened, and the use guarantee is improved.

In one embodiment, the battery has an outer shell and an inner shell 3, the battery cell module 4 is arranged in a cavity of the inner shell 3, the battery cell radiator 5 is covered at the cavity opening of the inner shell 3, namely, the battery cell module 4 is covered in the inner shell 3, so that the battery cell module 4 and the battery cell radiator 5 can form an integral module, the battery cell module 4 is convenient to assemble, disassemble and maintain, and meanwhile, the battery cell module 4 is convenient to seal, for example, the battery cell radiator 5 is covered at the cavity opening of the inner shell 3 and seals the cavity opening of the inner shell 3, so that the battery cell module 4 is sealed in the inner shell 3, and the waterproof performance of the battery cell module 4 is improved.

Specifically, the cell radiator 5 includes a cover plate 51 and a heat dissipation fin 52, where the cover plate 51 covers the cavity opening of the inner housing 3 and is connected with the cavity opening in a sealing manner. The cover plate 51 may be provided with a wire opening through which a wire passes, and after the wire harness passes, the wire opening may be sealed by using glue, so that the cell module 4 may be effectively sealed, and the waterproof performance of the cell module is good and high-level.

The heat dissipation fins 52 of the cell heat sink 5 are located on the cover plate 51 and outside the housing cavity of the inner housing 3 towards or in contact with the cooling channels 14. The whole cell radiator 5 can be an aluminum profile, a good heat conduction path is established between the cell module 4 and the cooling channel 14, thermal resistance is reduced, and heat is efficiently dissipated.

The shell comprises a top cover 1 and a bottom cover 2, wherein the top cover 1 and the bottom cover 2 are respectively provided with a cover cavity, the top cover 1 and the bottom cover 2 are buckled to form the shell, and the two parts of cover cavities form an inner space. The bottom of the inner shell 3 can be placed in the bottom cover 2 for fixing, and after the top cover 1 is buckled, the inner shell 3 is integrally positioned in the outer shell of the battery.

The sealing of the circuit assembly module can be set as follows, the cover cavity of the top cover 1 is used for accommodating the circuit assembly module and the insulating support 7, the outer peripheral wall of the insulating support 7 is connected with the inner wall of the top cover 1, the joint is sealed, and the insulating support 7 can be plate-shaped. In this way, the circuit module is sealed in the top cover 1 by the insulating holder 7, and the circuit module is also sealed well. As for the DC/DC converter 6, it is a finished product, and has a certain waterproof performance, and when the connection end is connected with the insulating support 7, it is equivalent to that the insulating support 7 seals the connection end, and the rest part is waterproof through the housing of the converter itself.

According to the above, the two large components on two sides of the cooling channel 14 of the battery are respectively sealed, the battery cell module 4 is sealed in the inner shell 3 through the battery cell radiator 5, and the circuit module is sealed in the top cover 1 through the insulating support 7, so that the circuit module is respectively sealed, is convenient to assemble, is convenient to ensure the overall sealing performance, and meanwhile, the two large components can be separated and arranged, the cooling channel 14 is convenient to set, the heat dissipation structure is convenient to set, and the heat dissipation performance is ensured. For example, the inner case 3 is placed in the bottom cover 2, the top cover 1 is covered on the bottom cover 2, the cooling channel 14 formed by the first interval is arranged between the cell radiator 5 and the DC/DC converter 6 on the top cover 1, the top cover 1 and the bottom cover 2 can be connected through fasteners such as bolts, and can also be bonded in a sealing way through sealant. Thus, the whole battery is assembled, and has good sealing and heat dissipation performance.

The cell module 4 and the circuit module are separated and sealed and separated by the cooling channel 14, so that on one hand, the two components can share one cooling channel 14 and can effectively dissipate heat, and the heat of the DC/DC converter 6 can not influence the cell module 4; on the other hand, the two components are effectively sealed, so that the waterproof performance can be improved, the cooling channel 14 can be separated, and when the cooling mode is air cooling, even if foreign matters enter the channel under extreme conditions, key parts such as the cell module 4 and the circuit module can be prevented from being influenced.

In a high-temperature environment, the use of the battery is easily affected by the high temperature of the environment, so the utility model also provides an embodiment, in which a heat insulation layer is arranged between the battery cell module 4 and the shell of the battery, the influence of the external high temperature on the battery cell module 4 is obviously reduced, and the use quality, the service life and the like of the battery are not affected by the external environment temperature; meanwhile, the heat preservation performance of the battery can be improved, and the adverse effect of external low temperature on the battery is reduced.

The insulating layer may be formed by establishing a partition layer around the outer periphery of the cell module 4, or may be formed by providing an insulating material, such as insulating cotton, insulating board, vacuum insulating board (formed by compounding a filling core material with a vacuum protection surface layer), insulating coating, and the like. In combination with the above embodiment, the battery cell module 4 is disposed in the inner case 3, and a heat insulating layer is disposed between the inner case 3 and the outer case.

In one embodiment, the outer peripheral wall of the inner case 3 and the inner peripheral wall of the outer case (refer to the outer case formed after the top cover 1 and the bottom cover 2 are covered) have a second space therebetween, and the second space forms the heat insulating layer. So set up, simple structure simultaneously, also can play thermal-insulated effect of heat preservation.

Meanwhile, when the cooling channel 14 is formed by the first interval, the second interval is communicated with the first interval, the heat insulation layer is communicated with the cooling channel 14, air in the heat insulation layer is communicated with cold air in the cooling channel 14, when the battery is in a high-temperature environment, the temperature of the air in the heat insulation layer is higher, the heat of the battery cell module 4 can be reduced more effectively by being equivalent to the fact that the periphery of the battery cell module 4 can be cooled down, and the heat insulation package is also equivalent to the fact that the periphery of the battery cell module 4 is formed, so that the purpose of heat insulation of the battery cell and the external environment is effectively achieved.

The battery case, namely the top cover 1 and the bottom cover 2, can be made of plastic materials, so that the heat insulation performance of the battery is further ensured.

In the inner shell 3, the inner shell 3 can be made of plastic, aluminum or carbon steel according to the requirements. The heat conducting substance can be filled between the cell module 4 and the inner shell 3, for example, a first heat conducting substance is filled between the bottom of the cell module 4 and the inner shell 3, a second heat conducting substance is filled between the circumferential direction and the inner shell 3, good heat conducting effect between the cell module and the inner shell 3 is guaranteed, good heat dissipation in the circumferential direction of the cell module 4 is guaranteed, and heat dissipation performance of the battery is further improved.

The first heat conduction material can be heat conduction cotton, can heat conduction and simultaneously can firmly support the cell module 4, the second heat conduction material can be heat conduction glue, and when playing the heat conduction role, the cell module 4 and the inner shell 3 are firmly bonded together, and the gap between the cell module 4 and the inner shell 3 is sealed, so that the comprehensive sealing waterproof protection effect is achieved on the cell module 4.

An insulating plate can be further arranged between the battery core of the battery core module and the inner shell 3 or between the outer wall of the battery core module 4 and the inner shell 3 for protecting the module.

At present, the dual-voltage battery comprises two groups of battery modules, one group of battery modules is responsible for outputting one voltage, namely, only two groups of independent battery modules are arranged together in a concentrated mode, the integration level is not high enough, and the dual-voltage battery has the problems of large volume and multiple waiting optimization of parts. Therefore, in order to solve this problem, the battery of the present utility model is provided with the following structure:

the battery core of the battery core module 4 is an integrated battery core 41, and the integrated battery core 41 is composed of a plurality of battery cores connected in series, so that the integrated battery core 41 is a group of batteries. The integrated battery cell 41 has a total positive electrode and a total negative electrode (total positive electrode and total negative electrode of all battery cells connected in series), and a first voltage is arranged between the total positive electrode and the total negative electrode of the integrated battery cell 41 to form a first output circuit for outputting the first voltage; meanwhile, a local part (a part of the series-connected battery cores) of the integrated battery core 41 forms a shunt battery core block, and the positive electrode of the shunt battery core block forms a shunt positive electrode, namely, two positive electrodes are arranged on the integrated battery core 41, a second voltage is arranged between the shunt positive electrode and the total negative electrode, a second output circuit is formed, the second voltage is output, and the first voltage is larger than the second voltage. The integrated cell 41 can output two voltages of different magnitudes.

Therefore, the battery provided by the utility model provides two different voltages by using one group of electric cores, does not need to arrange two groups of electric cores and does not relate to parallel and serial circuits between the two groups of electric cores, only one set of circuits matched with the integrated electric cores 41 is needed, the composition of a power supply system is simplified, the total volume of the battery is reduced, the cost is reduced, the technical effect that the two voltage requirements are met by using one set of concise power supply system is realized, the application and the arrangement are very convenient, and compared with the traditional double-voltage battery, the space and the cost of at least one battery pack can be saved.

Specifically, the integrated battery cell 41 is formed by connecting a plurality of N battery cells in series, for example, the N battery cells having a total positive electrode and a total negative electrode after being connected in series, and outputting a first voltage therebetween. Meanwhile, some of the N cells, for example, M cells, form a cell block belonging to the integrated cell 41 and encompassed by the integrated cell 41, which is called a split cell block. The M series-connected battery cores are formed into a battery core block, and the battery core block is a certain part of N series-connected battery cores. The output positive electrode of the current-dividing core block forms the current-dividing positive electrode, the output total negative electrode forms the total negative electrode of the first voltage, and the first voltage is output. The integrated battery cell 41 has a very simple structure, and can reduce the number of battery cells to the maximum extent.

When the split cell block is formed by M serial connected N cells, the total negative electrode of the integrated cell 41 is the total negative electrode of the first voltage. The arrangement of the negative electrode lead wires can be reduced, and the arrangement is reasonable and concise.

The bus plate 43 of the cell module 4 is connected to the tabs of each cell, and then each tab is connected in series to output a voltage. The bus plate 43 is provided with a bus bar connected to each tab, and includes a shunt positive bus bar 431 connected to the positive tab of the shunt core block, a total positive bus bar 432 connected to the total positive tab of the integrated battery 41 (positive tab of the first battery in the N battery cells in series order), and a total negative bus bar 433 connected to the total negative tab of the integrated battery 41 (negative tab of the nth battery in the N battery cells in series order). The shunt positive bus 431, the total positive bus 432, and the total negative bus 433 are connected to the circuit assembly module using copper bars or wiring harnesses.

The circuit assembly module comprises a first switch arranged between the shunt positive electrode and the total negative electrode and a second switch arranged between the total positive electrode and the total negative electrode. Therefore, the two voltages can be output simultaneously or independently, and the control and the use are convenient. The circuit assembly module further comprises a first voltage relay 11 electrically connected to the first switch and a second voltage relay 12 electrically connected to the second switch.

The LFP cell outputs 12V and 48V, as shown in fig. 7, the voltage of the single cell is 3.2V, so the 12V voltage is provided by the 4SLFP cell, the 48V is provided by the 14SLFP cell, wherein the 4S LFP cell for providing the 12V voltage can be directly provided by the 4S cell portion of the 14SLFP near the total negative end, the shunt positive bus 431 is disposed at the positive electrode of the 4 th string cell, and the 12V can be realized by the total negative electrode and the shunt positive bus 431. 48V is provided by the total negative electrode and the shunt positive electrode bus bar, namely the total negative electrode of the module is shared by the 12V battery and the 48V battery. Compared with the traditional method that 12V and 48V totally need 18S battery cells, the structure of the utility model can directly reduce the number of battery cells, reduce the cost and reduce the volume.

As shown in fig. 7, insulating plates are provided on the bottom, side surfaces, and end surfaces of the integrated battery cell 41. A separator may be further disposed between the split cell block portion and the remaining cells, and a split positive electrode bus 431 is disposed on the bus plate 43 corresponding to the separator. A shunt 434 may be provided at both the total positive bus 432 and the total negative bus 433.

Furthermore, the battery also comprises a battery management system, namely a BMS (battery management system), the battery management system can intelligently and conveniently manage two output voltages and two switches, can output two voltages simultaneously, can selectively output one voltage, and can also manage the electric quantity of the battery and the like. The battery management system has a plurality of component elements, however, the working principle thereof belongs to the prior art, so the working principle and specific components are not described in detail herein.

The components of the battery management system may be mounted on a single circuit board or may be mounted on a single circuit board together with the circuit assembly module. In this embodiment, in order to facilitate the arrangement and reduce the total volume of the battery, the battery management system is distributed on two circuit boards, i.e., the first circuit board 9 and the second circuit board 10, for example, the logic control module and related components of the battery management system are located on the first circuit board 9, and the power control module and related components are located on the second circuit board 10. The first circuit board 9 is connected to the side wall of the cell module 4 or the inner housing 3 by means of a bracket, and the second circuit board 10 is connected to the side of the insulating bracket 7 remote from the DC/DC converter 6, i.e. integrated with the circuit module. And the first circuit board 9 may be connected to the cell module 4 for dissipating heat using the cooling channels 14. Therefore, the battery management system is arranged in a blocking way, the space layout is reasonably utilized, and the total volume of the battery can be reduced; and can dispel the heat, avoid influencing the heat dispersion of the battery.

The basic principles of the present utility model have been described above in connection with specific embodiments, however, it should be noted that the advantages, benefits, effects, etc. mentioned in the present utility model are merely examples and not intended to be limiting, and these advantages, benefits, effects, etc. are not to be considered as essential to the various embodiments of the present utility model. Furthermore, the specific details disclosed herein are for purposes of illustration and understanding only, and are not intended to be limiting, as the utility model is not necessarily limited to practice with the above described specific details.

The components, arrangements, etc. referred to in this disclosure are only illustrative examples and are not intended to require or imply that the connections, arrangements, configurations must be made in the manner shown in the drawings. These components, devices, may be connected, arranged, configured in any manner, as will be appreciated by those skilled in the art. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The terms "or" and "as used herein refer to and are used interchangeably with the term" and/or "unless the context clearly indicates otherwise. The term "such as" as used herein refers to, and is used interchangeably with, the phrase "such as, but not limited to.

It should also be noted that in the apparatus, device of the present utility model, the components may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present utility model.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the utility model. Thus, the present utility model is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

It should be understood that the terms "first" and "second" used in the description of the embodiments of the present utility model are only used for clearly illustrating the technical solutions, and are not used to limit the protection scope of the present utility model.

The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit embodiments of the utility model to the form disclosed herein. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is to be construed as including any modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (13)

1. A battery, characterized by comprising a shell, and a battery cell module (4), a circuit assembly module and a DC/DC converter (6) which are positioned in the shell, wherein the battery cell module (4) and the circuit assembly module are respectively arranged at two sides of the DC/DC converter;

and a cooling channel (14) is formed between the battery cell module (4) and the DC/DC converter (6), and a medium inlet (101) and a medium outlet (102) which are respectively communicated with two ends of the cooling channel (14) are formed on the shell.

2. The battery according to claim 1, characterized in that a cell heat sink (5) is further provided in the housing, the cell heat sink (5) being connected to a side of the cell module (4) close to the DC/DC converter (6), the cooling channel (14) being located between the cell heat sink (5) and the DC/DC converter (6).

3. The battery according to claim 2, characterized in that the cell heat sink (5) and the DC/DC converter (6) have a first spacing between them, which first spacing forms the cooling channel (14).

4. A battery according to any one of claims 1-3, characterized in that a medium pressure increasing member (8) is further provided, said medium pressure increasing member (8) being arranged at any one of said medium inlet (101) and said medium outlet (102) in said cooling channel (14);

and/or the inlet end and the outlet end of the cooling channel (14) are provided with air guide structures.

5. The battery according to claim 2, further comprising an inner case (3), wherein the cell module (4) is disposed in a case cavity of the inner case (3), the cell heat sink (5) has a cover plate (51) for covering or sealing an opening of the case cavity, and heat dissipation fins (52) provided on the cover plate (51) and outside the case cavity, and the cooling channel (14), the DC/DC converter (6), and the circuit component module are located outside the inner case (3).

6. The battery according to claim 1, further comprising an insulating holder (7), wherein the DC/DC converter (6) is connected to a side of the insulating holder (7) close to the cooling channel (14), wherein the circuit component module is arranged on a side of the insulating holder (7) remote from the cooling channel (14), and wherein an outer peripheral wall of the insulating holder (7) is connected to an inner wall of the housing or has a spaced or sealed connection.

7. The battery according to claim 6, wherein the outer case comprises a top cover (1) and a bottom cover (2) which are buckled, the insulating bracket (7) is plate-shaped and is in sealing connection with the inner wall of the top cover (1) so as to seal the circuit assembly module in a cover cavity of the top cover (1), the battery cell module (4) is arranged in a shell cavity of the inner case (3), and the bottom end of the inner case (3) is fixed in the cover cavity of the bottom cover (2).

8. The battery according to claim 1, characterized in that a thermal insulation layer is arranged between the cell module (4) and the housing; or, a heat insulation layer is arranged between the battery core module (4) and the DC/DC converter (6) and the shell.

9. The battery according to claim 5, characterized in that there is a second space between the outer peripheral wall of the inner case (3) and the inner peripheral wall of the outer case, the cooling channel (14) being formed by a first space between the cell module (4) and the DC/DC converter (6), the second space being in communication with the first space;

and/or a first heat conduction substance is filled between the bottom of the battery cell module (4) and the inner shell (3), and a second heat conduction substance is filled between the battery cell module and the inner shell (3) in the circumferential direction;

and/or an insulating plate is arranged between the battery cell module (4) and the inner shell (3);

and/or a heat conduction insulating pad (42) is laid between the bus plate (43) of the battery cell module (4) and the battery cell radiator (5).

10. The battery according to claim 1, wherein the cell module (4) comprises an integrated cell (41) composed of a plurality of cells connected in series, a part of the integrated cell (41) forming a split cell block, and a positive electrode of the split cell block forming a split positive electrode; the voltage between the shunt positive electrode and the total negative electrode of the integrated battery cell (41) is smaller than the voltage between the total positive electrode and the total negative electrode of the integrated battery cell (41).

11. The battery according to claim 6, characterized in that a battery management system is also provided, which comprises a first circuit board (9) and a second circuit board (10), the first circuit board (9) being connected to the side wall of the cell module (4) or the inner housing (3) by means of a bracket (13), the second circuit board (10) being connected to the side of the insulating bracket (7) remote from the DC/DC converter (6).

12. The battery according to claim 10, characterized in that the busbar (43) of the cell module (4) is laid over the integrated cell (41); the busbar (43) is provided with a shunt positive electrode busbar (431) connected with the positive electrode lug of the shunt cell block, a total positive electrode busbar (432) connected with the total positive electrode lug of the integrated cell (41) and a total negative electrode busbar (433) connected with the total negative electrode lug of the integrated cell (41);

and/or the circuit assembly module comprises a first switch arranged between the shunt positive electrode and the total negative electrode, a second switch arranged between the total positive electrode and the total negative electrode, a first voltage relay (11) electrically connected with the first switch and a second voltage relay (12) electrically connected with the second switch.

13. The battery of claim 12, wherein a shunt (434) is provided at both the total positive bus bar (432) and the total negative bus bar (433); and/or a partition board is arranged between the shunt cell block and the rest of the cells, and the shunt positive electrode bus bar (431) is arranged on the bus plate (43) at a position corresponding to the partition board.