CN220753535U - Battery sampling device and battery module - Google Patents
Battery sampling device and battery module Download PDFInfo
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- CN220753535U CN220753535U CN202322302276.2U CN202322302276U CN220753535U CN 220753535 U CN220753535 U CN 220753535U CN 202322302276 U CN202322302276 U CN 202322302276U CN 220753535 U CN220753535 U CN 220753535U
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Abstract
The utility model discloses a battery sampling device and a battery module, comprising: the temperature sensors are used for detecting the temperature of the battery cells, each temperature sensor is provided with a power end and a grounding end, and the power end and the grounding end of each temperature sensor are connected with the battery management system through a power conductor and a grounding conductor respectively. When the grounding end of a part of the temperature sensors shares one grounding conductor and is connected with the battery management system, the power ends of the corresponding part of the temperature sensors are respectively connected with the battery management system through one power conductor; or when the power supply end of a part of the temperature sensors share one power supply conductor to be connected with the battery management system, the grounding end of the corresponding part of the temperature sensors is respectively connected with the battery management system through one grounding conductor. The number of conductors used by the temperature sensor can be greatly reduced, the production cost is reduced, the production yield is improved, and the safety performance of the battery module is improved.
Description
Technical Field
The present utility model relates to the field of battery technologies, and in particular, to a battery sampling device and a battery module.
Background
Along with the development of new energy battery technology, along with the improvement of the energy density of the battery and the development of the rapid charging technology, the energy storage capacity and the endurance mileage of the battery are increased, the charging time is shortened, the practicability and the convenience of the battery are greatly improved, the risk is increased along with the development of the technology, and particularly the battery is easier to heat, so that the temperature of the battery is further increased, and the safety accident is caused. Therefore, the battery sampling device is required to monitor the temperature of the battery, the battery sampling device comprises a plurality of temperature sensors, the battery is composed of a plurality of electric cores, and usually the temperature sensors only detect the temperature of part of the electric cores, so that the temperature of all the electric cores cannot be obtained, and a large risk still exists. Along with people's requirement for battery safety is higher and higher, need to use battery sampling device to carry out temperature monitoring to every electric core, every temperature sensor needs two wires to draw forth, and when electric core quantity was great, the quantity of wire also can sharply increase, leads to battery sampling device's wire too much, on the one hand the wire too much can occupy very big space, on the other hand the wire too much also can cause the safety problem.
Accordingly, improvements are needed in existing battery sampling devices.
Disclosure of Invention
The utility model aims to provide a battery sampling device and a battery module, which reduce the number of conductors used by a temperature sensor, save the space occupied by the conductors, reduce the whole volume and weight of the battery module, facilitate production, improve the production efficiency, reduce the production cost, improve the production yield, reduce the safety risk caused by excessive conductors and improve the safety performance of the battery module.
The utility model adopts the following technical scheme:
a battery sampling device, comprising:
the temperature sensors are used for detecting the temperature of the battery cells and are provided with a power end and a grounding end, and the power end and the grounding end of each temperature sensor are connected with the battery management system through a power conductor and a grounding conductor respectively; wherein,
when the grounding end of part of the temperature sensors shares one grounding conductor and is connected with the battery management system, the corresponding power end of the part of the temperature sensors is connected with the battery management system through one power conductor; or,
when a part of power supply ends of the temperature sensors share one power supply conductor to be connected with the battery management system, the grounding ends of the corresponding part of the temperature sensors are respectively connected with the battery management system through one grounding conductor.
Preferably, the method comprises the steps of,
the power end of each temperature sensor is connected with the battery management system through one power conductor, and the grounding end of at least part of the temperature sensors shares one grounding conductor and is connected with the battery management system; or,
at least part of the power supply ends of the temperature sensors share one power supply conductor to be connected with the battery management system, and the grounding end of each temperature sensor is connected with the battery management system through one grounding conductor.
Preferably, the temperature sensor is a thermistor or a temperature sensing chip.
Preferably, each of the electric cores is provided with one of the temperature sensors.
Preferably, an analog-to-digital converter is arranged between the battery management system and the temperature sensor, and the analog-to-digital converter is used for converting an analog signal of the temperature sensor into a digital signal.
Preferably, the battery cell further comprises a bus bar, wherein the bus bar is used for electrically connecting the battery cells, and the temperature sensor is arranged between the bus bar and the battery cells or on the bus bar.
Preferably, the battery management system further comprises voltage collection points, wherein the voltage collection points are arranged on the bus bars, and each voltage collection point is connected with the battery management system through a voltage collection conductor.
Preferably, the device further comprises a plurality of pressure sensors, wherein the pressure sensors are arranged on the bus bar or the battery cell and are used for detecting the pressure of the battery cell.
Preferably, a plurality of the pressure sensors are connected in parallel.
A battery module comprising a plurality of cells and a battery sampling apparatus as claimed in any one of the above.
Compared with the prior art, the utility model has the beneficial effects that at least:
according to the battery sampling device and the battery module, the plurality of temperature sensors share the power supply conductor or share the grounding conductor, so that the number of the conductors used by the temperature sensors can be greatly reduced, the space occupied by the conductors is saved, the whole volume and the weight of the battery module can be reduced, the production is convenient, the production efficiency is improved, the production cost is reduced, the production yield is improved, the safety risk caused by excessive conductors is reduced, and the safety performance of the battery module is improved.
Drawings
FIG. 1 is a schematic diagram of a wiring of a temperature sensor according to an embodiment of the present utility model.
FIG. 2 is a schematic diagram of another connection of a temperature sensor according to an embodiment of the present utility model.
FIG. 3 is a schematic diagram of a bus bar according to an embodiment of the present utility model.
Fig. 4 is a schematic diagram of voltage acquisition points versus cell distribution according to an embodiment of the present utility model.
FIG. 5 is a schematic diagram of the wiring of a pressure sensor according to an embodiment of the present utility model.
In the figure: 1. a temperature sensor; 11. a power supply terminal; 12. a grounding end; 13. a power supply conductor; 14. a ground conductor; 2. a busbar; 21. a busbar support; 22. a conductive portion; 3. a voltage acquisition point; 31. a voltage acquisition conductor; 4. a pressure sensor; 41. a pressure conductor; 5. and a battery cell.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many 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, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a repetitive description thereof will be omitted.
The words expressing the positions and directions described in the present utility model are described by taking the drawings as an example, but can be changed according to the needs, and all the changes are included in the protection scope of the present utility model.
Referring to fig. 1 to 5, the present utility model provides a battery sampling apparatus including: the plurality of temperature sensors 1 may further include a bus bar 2, a voltage collection point 3, and a plurality of pressure sensors 4.
The temperature sensors 1 are used for detecting the temperature of the battery cells 5, the temperature sensors 1 have a power supply terminal 11 and a ground terminal 12, and the power supply terminal 11 and the ground terminal 12 of each temperature sensor 1 are connected with a battery management system (not shown) through a power supply conductor 13 and a ground conductor 14, respectively. The power supply conductor 13 and the ground conductor 14 may be wires, harnesses, flexible circuits, or the like, and may be set according to actual needs.
Referring to fig. 1, when the ground terminals 12 of a part of the temperature sensors 1 share one ground conductor 14 to be connected to the battery management system, the corresponding power terminals 11 of the part of the temperature sensors 1 may be connected to the battery management system through one power conductor 13, respectively, and the number of the ground conductors 14 may be reduced by sharing one ground conductor 14 for the ground terminals 12 of the temperature sensors 1.
Referring to fig. 2, when the power supply terminals 11 of a part of the temperature sensors 1 share one power supply conductor 13 to be connected with the battery management system, the ground terminals 12 of the corresponding part of the temperature sensors 1 may be respectively connected with the battery management system through one ground conductor 14, and the number of the power supply conductors 13 may be reduced by sharing one power supply conductor 13 with the power supply terminals 11 of the temperature sensors 1.
The plurality of temperature sensors 1 share the power conductor 13 or share the grounding conductor 14, so that the number of the conductors used by the temperature sensors 1 can be greatly reduced, the space occupied by the conductors is saved, the whole volume and the weight of the battery module can be reduced, the production is convenient, the production efficiency is improved, the production cost is reduced, the production yield is improved, the safety risk caused by excessive conductors is reduced, and the safety performance of the battery module is improved.
In a specific embodiment, the power supply end 11 of each temperature sensor 1 may be connected to the battery management system through a power supply conductor 13, and at least part of the grounding ends 12 of the temperature sensors 1 share a grounding conductor 14 to be connected to the battery management system; or,
at least part of the power supply terminals 11 of the temperature sensors 1 share a power supply conductor 13 for connection to the battery management system, and the ground terminal 12 of each temperature sensor 1 is connected to the battery management system via a ground conductor 14, respectively. The number of conductors used by the temperature sensor 1 can be further reduced, the space occupied by the conductors is saved, the whole volume and weight of the battery can be reduced, the production is convenient, the production efficiency is improved, the production cost is reduced, the production yield is improved, the safety risk caused by excessive conductors is reduced, and the safety performance of the battery is improved.
Preferably, the power supply end 11 of each temperature sensor 1 can be connected with the battery management system through one power supply conductor 13 respectively, and the grounding end 12 of all the temperature sensors 1 share one grounding conductor 14 to be connected with the battery management system; or,
the power supply terminals 11 of all temperature sensors 1 share a power supply conductor 13 for connection to the battery management system, and the ground terminal 12 of each temperature sensor 1 is connected to the battery management system via a ground conductor 14, respectively. For example, when the battery assembly has thirteen battery cells 5 and thirteen temperature sensors 1 are required to be arranged, according to the conventional method, two conductors are required for one temperature sensor 1, twenty-six conductors are required in total, according to the method of the embodiment, only thirteen power conductors 13 and one grounding conductor 14 are required, or only one power conductor 13 and thirteen grounding conductors 14 are required, and fourteen conductors are required, so that the number of the conductors used by the temperature sensor 1 is minimum, the space occupied by the conductors is saved to the greatest extent, the whole volume and the weight of the battery module can be reduced, the production is convenient, the production efficiency is improved, the production cost is reduced, the production yield is improved, the safety risk caused by excessive conductors is reduced, and the safety performance of the battery module is improved.
The temperature sensor 1 may be a thermistor or a temperature-sensitive chip. A thermistor is a temperature-sensitive resistor device whose resistance value changes correspondingly with a change in temperature. It is a component that utilizes the thermal effect to achieve temperature measurement and control. Depending on the materials, thermistors may be classified into Positive Temperature Coefficient (PTC) and Negative Temperature Coefficient (NTC) types. The resistance value of a positive temperature coefficient thermistor (PTC) increases with increasing temperature, and the higher the temperature, the faster the resistance value thereof increases. It is commonly used for over-current protection, temperature compensation, and the like applications. The resistance value of a negative temperature coefficient thermistor (NTC) decreases with increasing temperature, and the higher the temperature, the faster its resistance value decreases. It is generally used in the fields of temperature measurement, temperature control, etc. The temperature sensing chip can process and control by measuring the temperature of the chip itself or the surrounding environment and converting the temperature into an electrical signal. The type of the corresponding temperature sensor 1 can be selected according to actual needs.
Each electric core 5 corresponds to set up a temperature sensor 1 respectively, that is to say how many electric cores 5 correspond to set up how many temperature sensors 1, the temperature of each electric core 5 is all monitored in real time, can ensure in time to discover electric core 5 abnormal condition like this, in time handle the unusual electric core 5 of temperature, avoided electric core 5 to lead to the incident because of the high temperature, very big improvement the security performance of battery module.
An analog-to-digital converter (not shown) is arranged between the battery management system and the temperature sensor 1, and the analog-to-digital converter is used for converting an analog signal of the temperature sensor 1 into a digital signal so as to display the temperature of the battery cell 5 detected by the temperature sensor 1 in real time, thereby facilitating system identification and inspection of operators.
In a specific embodiment, the battery sampling device may further include a bus bar 2, where the bus bar 2 is used to electrically connect the battery cells 5, and the temperature sensor 1 is disposed between the bus bar 2 and the battery cells 5, or the temperature sensor 1 is disposed on the bus bar 2. The busbar 2 includes a busbar support 21 and a conductive portion 22, the conductive portion 22 is disposed on the busbar support 21, the conductive portion 22 is used for connecting at least two electric cores 5 in series or parallel or series-parallel, i.e. the series-parallel connection includes parallel connection and series connection, and the conductive portion 22 can also be used as a conductive contact point to connect the electric cores 5 with other circuits through wires. The conductive portion 22 may be made of aluminum, so that the conductive portion 22 has better conductivity and improves the over-current capability. Of course, the conductive portion 22 may be made of copper or other conductive materials. In addition, the number of the conductive portions 22 may be one, or two or more, and specifically, may be adaptively set according to the number of the electric cells 5 to be electrically connected. The number of the bus bars 2 may be one, or of course, may be two or more, and specifically, may be adaptively set according to the number and arrangement manner of the battery cells 5. The power supply conductor 13 and the grounding conductor 14 connected with the temperature sensor 1 can be led out through the bus bar support 21, and the bus bar support 21 has a constraint function on the power supply conductor 13 and the grounding conductor 14, so that the power supply conductor 13 and the grounding conductor 14 can be orderly and stably arranged, the production is convenient, the later maintenance is convenient, and meanwhile, the power supply conductor 13 and the grounding conductor 14 can be prevented from being damaged due to buckling or dislocation and extrusion.
When the temperature sensor 1 is disposed between the busbar 2 and the cell 5, the temperature sensor 1 is clamped and fixed between the busbar 2 and the cell 5, that is, the busbar 2 and the cell 5 are respectively located at two opposite sides of the temperature sensor 1, and the temperature sensor 1 located in the middle is in abutment limiting. The battery cell 5 may directly limit the temperature sensor 1 in contact therewith, or may indirectly limit the temperature sensor 1 in contact therewith. The temperature sensor 1 is limited directly or indirectly through the busbar 2 and the battery cell 5, so that the busbar 2 is fixed, the busbar 2 and the temperature sensor 1 are fixed at one time, and the assembly efficiency of the battery sampling device is improved. At the same time, the structure for connecting and fixing the temperature sensor 1 is not required to be additionally arranged. The temperature sensor 1 may be fixed to the busbar 2 by clamping or by directly or indirectly fixing the temperature sensor 1 to the battery cell 5.
When the temperature sensor 1 is arranged on the busbar 2, the temperature sensor 1 is arranged between the busbar bracket 21 and the conductive part 22, so that the temperature sensor 1 can be limited by the conductive part 22 when the conductive part 22 is fixed, and a fixing piece for compressing and limiting the temperature sensor 1 is not required to be additionally arranged. At this time, the number of parts of the battery sampling device is reduced, and the production beat of the battery sampling device can be accelerated to improve the production efficiency of the battery sampling device. The temperature sensor 1 may be provided on the bus bar holder 21 or the conductive portion 22.
When the temperature sensor 1 is disposed between the busbar 2 and the battery cell 5, a heat conducting member, such as a heat conducting silica gel, a heat conducting pad, etc., may be disposed between the temperature sensor 1 and the battery cell 5, and the heat conducting member is used for transmitting the temperature of the battery cell 5 to the temperature sensor 1. When the temperature sensor 1 is disposed on the busbar 2, a heat conducting member can be disposed between the busbar 2 and the battery cell 5, and the heat conducting member is used for transmitting the temperature of the battery cell 5 to the busbar 2, and the busbar 2 transmits the temperature to the temperature sensor 1. The heat conducting member is used for better transmitting the temperature of the battery cell 5 to the temperature sensor 1 so as to improve the accuracy of temperature detection of the battery cell 5 by the temperature sensor 1.
The battery sampling device may further include voltage collection points 3, the voltage collection points 3 being disposed on the bus bar 2, in this embodiment, the voltage collection points 3 being disposed on the conductive portions 22, each voltage collection point 3 being connected with the battery management system through a voltage collection conductor 31. The electric voltage collection conductor 31 connected with the battery sampling device can be led out through the bus bar support 21, and the bus bar support 21 has a constraint function on the electric voltage collection conductor 31, so that the electric voltage collection conductor 31 can be orderly and stably arranged, the production is convenient, the later maintenance is convenient, and meanwhile, the electric voltage collection conductor 31 can be prevented from being damaged due to buckling or dislocation and extrusion.
The battery sampling device may further include a plurality of pressure sensors 4, the pressure sensors 4 are disposed on the bus bar 2 or the battery cell 5, the pressure sensors 4 are used for detecting the pressure of the battery cell 5, and the pressure sensors 4 are connected with the battery management system through pressure conductors 41. In this embodiment, the pressure sensors 4 are disposed on the electric cores 5, and each electric core 5 is preferably provided with a pressure sensor 4, and the pressure sensor 4 is used for monitoring the internal air pressure change of the telecommunication, so that possible safety problems such as air leakage, overpressure or low pressure of the electric core 5 can be detected in time.
The plurality of pressure sensors 4 are preferably connected in parallel, and the plurality of pressure sensors 4 may be connected to the battery management system through two pressure conductors 41, so that the number of pressure conductors 41 connecting the pressure sensors 4 may be reduced. The pressure conductor 41 connected with the pressure sensor 4 can be led out through the busbar bracket 21, and the busbar bracket 21 has a constraint function on the pressure conductor 41, so that the pressure conductor 41 can be orderly and stably arranged, the production is convenient, the later maintenance is convenient, and meanwhile, the damage to the pressure conductor 41 caused by buckling or dislocation and extrusion can be prevented.
The utility model also provides a battery module which comprises a plurality of electric cores 5 and the battery sampling device according to any one of the above. The application can also be used on IBS (Individuai Battery System, single-cell life early warning system). IBS means that through integrating and data acquisition to the battery core CCS (Cell Contact System, integrated busbar), the battery cell voltage, temperature, internal resistance, SOC (State of Charge), SOH (State of Health), leakage current information are monitored in real time, and the battery has high-speed communication and pre-control corresponding capability, so that big data management is carried out on the whole life cycle of the battery; the method comprises the steps of carrying out real-time monitoring and prediction on the running condition trend of an electric core (battery cluster), establishing an individual safety system SOS based on batteries, updating the safety running of an energy storage system in real time, adopting a brand-new algorithm in a battery state calculation technology, having the characteristics of self-learning and a neural network model, being capable of self-adapting to various batteries, learning battery parameters in real time, taking the safety state of the batteries as an evaluation parameter of the batteries, and greatly improving the safety and the cycle life (delaying attenuation) of the battery system; and the front end acquisition and active equalization chip of the large-scale battery management system is developed and cooperated with the wireless PACK, and the complete energy storage technology ecology for realizing the energy storage value expression is realized from the battery cell, the BMS chip, the BMS application system, the energy storage data aggregation, the diagnosis analysis, the value mining and the data energization, and the power grid access. IBS adopts a battery core/battery full life cycle management system, and utilizes a big data self-adaptive algorithm to control the energy ratio in real time.
While embodiments of the present utility model have been shown and described, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that changes, modifications, substitutions and alterations may be made therein by those of ordinary skill in the art without departing from the spirit and scope of the utility model, all such changes being within the scope of the appended claims.
Claims (10)
1. A battery sampling device, comprising:
the temperature sensors are used for detecting the temperature of the battery cells and are provided with a power end and a grounding end, and the power end and the grounding end of each temperature sensor are connected with the battery management system through a power conductor and a grounding conductor respectively; wherein,
when the grounding end of part of the temperature sensors shares one grounding conductor and is connected with the battery management system, the corresponding power end of the part of the temperature sensors is connected with the battery management system through one power conductor; or,
when a part of power supply ends of the temperature sensors share one power supply conductor to be connected with the battery management system, the grounding ends of the corresponding part of the temperature sensors are respectively connected with the battery management system through one grounding conductor.
2. The battery sampling apparatus of claim 1, wherein the battery sampling apparatus comprises a battery cell,
the power end of each temperature sensor is connected with the battery management system through one power conductor, and the grounding end of at least part of the temperature sensors shares one grounding conductor and is connected with the battery management system; or,
at least part of the power supply ends of the temperature sensors share one power supply conductor to be connected with the battery management system, and the grounding end of each temperature sensor is connected with the battery management system through one grounding conductor.
3. The battery sampling device of claim 1, wherein the temperature sensor is a thermistor or a temperature sensing chip.
4. The battery sampling device according to claim 1, wherein each of the electric cells is provided with one of the temperature sensors, respectively.
5. The battery sampling device of claim 1, wherein an analog-to-digital converter is disposed between the battery management system and the temperature sensor, the analog-to-digital converter being configured to convert an analog signal of the temperature sensor to a digital signal.
6. The battery sampling device of claim 1, further comprising a buss bar for electrically connecting the cells, the temperature sensor disposed between the buss bar and the cells, or the temperature sensor disposed on the buss bar.
7. The battery sampling device of claim 6, further comprising voltage collection points disposed on the bus bar, each voltage collection point being connected to the battery management system by a voltage collection conductor.
8. The battery sampling device of claim 6, further comprising a plurality of pressure sensors disposed on the buss bar or the cells, the pressure sensors configured to detect the pressure of the cells.
9. The battery sampling device of claim 8, wherein a plurality of the pressure sensors are connected in parallel.
10. A battery module comprising a plurality of cells and the battery sampling device according to any one of claims 1 to 9.
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| CN202322302276.2U CN220753535U (en) | 2023-08-27 | 2023-08-27 | Battery sampling device and battery module |
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| CN202322302276.2U CN220753535U (en) | 2023-08-27 | 2023-08-27 | Battery sampling device and battery module |
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