CN111435726A - Battery cell connector for connecting battery cells in series - Google Patents
Battery cell connector for connecting battery cells in series Download PDFInfo
- Publication number
- CN111435726A CN111435726A CN202010032179.4A CN202010032179A CN111435726A CN 111435726 A CN111435726 A CN 111435726A CN 202010032179 A CN202010032179 A CN 202010032179A CN 111435726 A CN111435726 A CN 111435726A
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- Prior art keywords
- battery
- battery cell
- cell
- connecting element
- connection
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/514—Methods for interconnecting adjacent batteries or cells
- H01M50/517—Methods for interconnecting adjacent batteries or cells by fixing means, e.g. screws, rivets or bolts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
- H01M50/51—Connection only in series
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
- H01M50/529—Intercell connections through partitions, e.g. in a battery casing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention relates to a cell connector (2) for connecting cells (4) in series, comprising a first connecting element (2 a) for establishing a connection to a first cell pole (6 a) of a first cell (4 a), a second connecting element (2 b) for establishing a connection to a second cell pole (6 b) of a second cell (4 b), wherein the connecting elements (2 a, 2 b) are correspondingly shaped relative to one another and can be connected in series such that a contact surface (8) surrounding the cells (4) can be maximized in order to ensure effective cooling of the cells (4).
Description
Technical Field
The invention relates to a device according to the type of the independent device claim, a system according to the type of the independent system claim and a method according to the type of the independent method claim.
Background
Today's electric and hybrid vehicles operate on high energy or high power batteries. In order to achieve a satisfactory power supply and service life, the battery must be operated in a narrow temperature range. For this purpose, the battery system must be cooled accordingly by means of an effective cooling system. In the case of high power requirements and/or high ambient temperatures, liquid cooling solutions have proven particularly suitable here. However, even such cooling systems are limited under high loads and limit the power capacity of the battery system by having to regularly throttle the system in order to avoid overheating.
Disclosure of Invention
According to a first aspect, the subject of the invention is a device having the features of the independent device claim, a system having the features of the independent system claim and a method having the features of the independent method claim. Further features and details of the invention emerge from the corresponding dependent claims, the description and the drawings. The features and details described in connection with the device according to the invention are of course also applicable here in connection with the system according to the invention and the method according to the invention and vice versa, so that the disclosure with regard to the various inventive aspects is always or can be mutually referenced.
The cell connector according to the invention according to the independent claim is used in particular for connecting battery cells in series. The advantage of the cell connector is, in particular, that the structure according to the invention makes it possible to cool the battery cells particularly effectively and thus to achieve a high power capacity of the battery system while ensuring a long service life. Furthermore, a high thermal reliability with a very low temperature difference is also achieved within the battery system by means of an optimal cooling. Furthermore, a particularly compact battery system design with a lower transition resistance can be achieved by means of the structure according to the invention.
The battery cell connector according to the invention can be used in motor vehicles, in particular electric or hybrid vehicles. Use in trucks, cranes, forklifts, boats, flyers or stationary systems is likewise conceivable.
The battery cell connector according to the invention for connecting battery cells in series here comprises a first connecting element for establishing a connection with a first battery pole of a first battery cell and a second connecting element for establishing a connection with a second battery pole of a second battery cell. The connecting elements are configured according to the invention in a form-fitting manner with respect to one another and can be connected to one another in series such that the contact surface surrounding the battery cells can be maximized in order to ensure effective cooling of the battery cells.
The cell connector according to the invention is preferably formed in two parts and consists of a first and a second connecting element. The cell connector is advantageously provided for the electrical connection of round cells and in this case, in particular, two cells arranged one above the other can be connected to each other in series. In the context of a stable arrangement, the present cell connectors are formed at least partially from a metallic material. In this case, the cell connectors are preferably made at least partially of a copper material, at least partially of an aluminum material or at least partially of an iron material, with respect to an electrical connection that is as low as possible. The first pole of the battery cell can preferably be the positive pole of the relevant battery cell, while the second pole of the battery cell is correspondingly designed as the negative pole. At least the first and second poles are correspondingly polarized differently from each other, so that one of the two poles forms the positive pole and the other the negative pole. Within the scope of the present invention, configurations corresponding in shape to one another are to be understood as meaning that the shape of the first connecting element is configured at least partially complementary to the shape of the second connecting element, and thus, for example, the shape of the first connecting element can be introduced at least partially into the shape of the second connecting element in a precisely fitting manner, or vice versa. The present connecting elements preferably have an at least partially cylindrical, conical, rectangular, spherical or pyramidal shape and advantageously have connecting regions for connecting the connecting elements to one another and fastening regions for fastening the connecting elements to the poles of the battery cells. In terms of a simple connection of the connecting elements, in particular the connecting regions of the relevant connecting elements, can also be designed, for example, at least partially in the form of a floor drain and have a lead-in chamfer for the simple introduction of a correspondingly shaped second connecting element. In contrast, the fastening region of the present connection element is preferably at least partially flattened or plate-shaped in order to ensure a simple fastening of the connection element to the pole of the battery cell.
Within the scope of a stable, reliable and long-lasting connection of the battery cells, provision can advantageously be made according to the invention for a recess for gas discharge to be provided. The recess for the gas discharge can preferably be provided in the second connecting element and is preferably formed here in the form of a hole or the like which opens laterally into the connecting element. Instead of laterally open holes, the connecting elements can also have tab-like recesses of different sizes, which are preferably regularly distributed along the connecting element. Instead of or in addition to the recess arranged in the first connecting element, the recess can also be arranged in the second connecting element.
In terms of a simple and stable connection of the battery cells, it can also be provided according to the invention that the connecting elements can be connected to one another in a force-fitting manner, wherein preferably a thread is provided for the force-fitting connection. In the context of a force-fitting connection between the connecting elements, a screw connection can be provided in particular, wherein the second connecting element is preferably an internal thread and the first connecting element comprises an at least partially corresponding external thread, and the connecting elements can therefore be connected to one another in a force-fitting manner by means of the screw connection in a simple manner. It is to be understood that it is equally possible to arrange an internal thread on the second connecting element and an external thread on the first connecting element.
In addition, it is likewise conceivable in terms of a simple and stable connection of the battery cells for the connecting elements to be connected to one another in a form-locking manner, wherein preferably a plug connection is provided for the form-locking connection. The plug connection can preferably be designed in the form of a clamping connection, wherein in particular the second connecting element has a preferably centrally arranged recess for introducing the first connecting element, which can then be reversibly clamped in the second connecting element by means of a force acting in the connecting direction. In this case, the first and/or the second connecting element can be designed in a spring-elastic manner in order to exert the clamping force. Alternatively or additionally, small, convex clamping elements, such as barbs or the like, can also optionally be provided, which hold the battery cell in a clamped fashion. Furthermore, it goes without saying that, as an alternative, the first connecting element can also have a recess for introducing the second connecting element, so that the second connecting element can then be reversibly clamped within the first connecting element.
In addition, it can be provided within the scope of a secure and stable connection that the connecting element can be connected to the battery cell in a cohesive manner, wherein the connecting element can preferably be welded. The connecting element preferably has a fastening region which is provided as a potential connection point for the cohesive connection to a pole of the battery cell. In this case, the fastening region is preferably easily accessible, in particular at least partially adapted to the shape of the battery pole, so that, for example, a cohesive connection can be established in a simple manner between the connecting element and the associated battery pole. As an alternative to a welded, cohesive connection, an adhesive or soldered, cohesive connection may also be considered.
The invention also relates to a battery system. The battery system comprises a plurality of battery cells, a plurality of the aforementioned battery cell connectors, and a cell carrier for receiving the battery cells. The present battery system is characterized in that the battery cells are arranged in a cell holder and are connected to one another in series by battery cell connectors in such a way that the contact surface surrounding the battery cells can be maximized in order to ensure effective cooling of the battery cells. Thus, the system hasThe same advantages are described in detail with respect to the battery cell connector according to the present invention. The cell support provided at present is preferably at least partially made of an electrically non-conductive material having a thickness of at least less than 10%-5The electrical conductivity of S/cm, in particular at least partially consisting of plastic. The cell holder can also optionally be made of a metallic material and provided with a corresponding plastic coating for insulation. In addition to a plurality of battery cell connectors according to the invention described above for connecting the battery cells in series, a parallel connection can also be provided for the parallel connection of the battery cells by means of additional connecting elements in terms of an increase in the charging capacity of the battery system. The additional connecting element can be designed here in the form of a web-like connecting means or in a simple case also in the form of a cable. In this case, the additional connecting elements are preferably at least partially made of a metallic material, in particular at least partially made of a copper material, an aluminum material or an iron material.
In the case of a battery system that is as efficient as possible, it can be advantageously provided that a cooling channel for cooling the battery cells is integrated into the present battery system, wherein the cooling channel is preferably arranged between the battery cells and the cell support, and wherein the battery cells are arranged in particular within the cell support in such a way that the surface of the cooling channel can be maximized. The maximization of the surface of the cooling channel or the maximization of the surface of the contact surface surrounding the battery cell according to the invention is based in particular on the special design and arrangement of the battery cell connector according to the invention in that, despite the stable fastening of the battery cell, only the smallest region of the outer contact surface of the battery cell is used as a connection surface. The maximum surface here means the maximum surface for heat extraction. For the purpose of heat removal or as a heat transfer medium, provision is made in particular for the heat transfer medium to have a mass fraction of less than 10 under standard conditions-5A liquid, advantageously non-conductive coolant of specific conductivity S/cm, such as, for example, distilled water, water fluoroether or a dielectric liquid.
In the context of the present effective cooling of the battery system, it can also be provided that a sealing means for sealing the cooling channel to the outside is provided, wherein the sealing means is preferably arranged at least partially between the cell support wall and the poles of the battery cell. The present sealing means can preferably consist of plastic, in particular rubber. In this case, the sealing means can be designed in particular such that they are pressed into the cell support wall, so that the seal remains tight over the entire service life under any operating conditions. In order to press the sealing element against the cell support wall, additional fastening elements, such as bolts, rivets or the like, can be provided in particular.
With regard to the rapid retrofitting of current battery systems, in particular with regard to rapid filling and emptying, it can be advantageously provided according to the invention that the cell holders have inlets and outlets for the introduction and removal of coolant. In this case, the inlet and the outlet can preferably be designed in the form of holes and in particular each be arranged between two battery cells arranged next to one another and/or a battery cell connector.
In the context of a long-life, reliable and scalable battery system, it is also conceivable to provide channels for gas discharge and electrical connection. The channel for gas discharge preferably extends at least partially through a recess advantageously provided inside the connecting element and is arranged within the cell support, so that additional connecting elements for the parallel connection of the battery cells can also extend through the channel. In the case of simple and flexibly accessible voltage taps of the present battery system, it is furthermore possible to provide taps for voltage tapping, which are preferably connected to the connecting element in a material-locking manner and are arranged in particular on the outer side of the cell support.
The subject matter of the invention is also a method for producing a battery system. The method for producing a battery system has a step of producing a first cohesive connection between a first connecting element and a first pole of a first battery cell, a step of producing a second cohesive connection between a second connecting element and a second pole of a second battery cell, and a step of producing a non-positive or positive connection between the first and second connecting elements for connecting the first and second battery cells in series. The method thus has the same advantages as have been described in detail in connection with the battery cell connector according to the invention and the system according to the invention. It goes without saying that the individual steps of the method according to the invention can also be carried out in a different order. In addition to the described steps, the method according to the invention may also comprise the step of inserting a battery cell, which is connected to the current battery cell connector in a force-fitting or form-fitting manner, into the cell holder.
Furthermore, the subject matter of the invention is also a motor vehicle comprising the aforementioned cell connector, in particular comprising the aforementioned battery system.
Drawings
Further advantages, features and details of the invention emerge from the following description, in which embodiments of the invention are described in detail with reference to the drawings. The features mentioned in the claims and in the description may be of importance for the invention here individually or in any combination.
In which is shown:
figure 1 shows a schematic view in cross section of a battery cell connector according to the invention for connecting battery cells in series according to a first embodiment,
figure 2 shows a schematic view in cross section of a battery cell connector according to the invention for connecting battery cells in series according to a second embodiment,
fig. 3 shows a schematic representation of a battery system according to the invention in a top view, comprising a plurality of battery cells, a plurality of battery cell connectors and a cell holder for accommodating the battery cells,
figure 4 shows a schematic view of the battery system according to the invention in figure 3 according to a cross-section along the section line I-I,
fig. 5 shows a further schematic illustration of the cell system according to the invention from fig. 4 with a gas distribution diagram.
In the figures, the same reference numerals are used for the same technical features.
Detailed Description
Fig. 1 shows a schematic representation of a battery cell connector 2 according to the invention for connecting battery cells 4 in series according to a first embodiment in a sectional view. The cell connector 2 comprises a first connecting element 2a for establishing a connection to a first battery pole 6a of a first battery cell 4a and a second connecting element 2b for establishing a connection to a second battery pole 6b of a second battery cell 4b, wherein the connecting elements 2a, 2b are correspondingly shaped relative to one another and are connected in series to one another in such a way that a contact surface 8 surrounding the battery cells 4 can be maximized in order to ensure effective cooling of the battery cells 4. The connecting elements 2a and 2b of the two-part cell connector 2 can be connected to one another in a force-fitting manner. For this purpose, an external thread 12a is arranged on the first connecting element 2a and a corresponding internal thread 12b is arranged on the second connecting element 2b, so that a simple and stable connection of the battery cells 4a and 4b can be established by a simple threaded connection.
A recess 10 for the removal of gas is also provided in the second connecting element 2 b. The recess 10 serves in particular to extract battery gases generated during operation of the battery system 1 and to ensure a stable and reliable, in particular long-life, connection of the battery cells 4. The recess 10 for degassing can preferably be formed here in the form of a hole which opens laterally into the connecting element 2 b. Instead of laterally open holes, the connecting elements 2b can also have tab-like recesses of different sizes, which are preferably regularly distributed along the connecting elements 2 b. Instead of or in addition to the recess 10 arranged in the second connecting element 2b, a recess can also be arranged in the first connecting element 2 a. The connecting elements 2a, 2b are connected to the fixing region 3 in the present case in a material-locking manner with the battery cells 4. In the case of a cohesive connection, the connecting elements 2a, 2b can be welded to the battery cells 4. The fastening region 3 is preferably designed to be easily accessible and in particular to be adapted at least partially to the shape of the battery poles 6a, 6b, so that a cohesive connection can be produced in a simple manner between the connecting element 2a, 2b and the respective battery pole 6a, 6 b. As an alternative to a welded, cohesive connection, an adhesive or soldered, cohesive connection may also be considered.
Fig. 2 shows a schematic view of a battery cell connector 2 according to the invention for connecting battery cells 4 in series according to a second embodiment in a sectional view. According to this second exemplary embodiment, the connecting elements 2a, 2b are not connected to one another in a force-fitting manner but in a form-fitting manner by means of a plug connection 14. The plug connection 14 is in the present case designed in the form of a clamping connection, wherein the second connecting element 2b has a centrally arranged recess for introducing the first connecting element 2a, so that the first connecting element 2a is then reversibly clamped within the second connecting element 2b by means of a force acting in the connecting direction. In this case, small, convex clamping elements (not shown here) can optionally also be provided, such as barbs or the like, which hold the battery cell 4 in a clamped form. Furthermore, it goes without saying that, as an alternative, the first connecting element 2a can also have a recess for introducing the second connecting element 2b, so that the second connecting element 2b can then be reversibly clamped within the first connecting element 2 a.
Fig. 3 shows a schematic representation of a battery system 1 according to the invention in a plan view, comprising a plurality of battery cells 4, a plurality of battery cell connectors 2 and a cell holder 16 for receiving the battery cells 4. In the top view shown in the present case, only the fastening elements 32 arranged above the battery cells 4 on the upper side of the present cell support 16 are visible, which fastening elements are arranged directly on the battery cell connector 2 according to the invention. Furthermore, an inlet 24a for introducing coolant is currently visible.
Fig. 4 shows a schematic representation of the battery system 1 according to the invention in fig. 3 in a sectional view according to the section line I-I. In the present case, two first and second battery cells 4a, 4b, which are connected to one another in series, are each arranged within the cell carrier 16, according to the sectional view shown. The series connection of the battery cells 4 is realized here by means of the battery cell connector 2 according to the invention. By means of the cell connectors 2, the battery cells 4 are connected to one another in series in such a way that the contact surface 8 surrounding the battery cells 4 is maximized in order to ensure effective cooling of the battery cells 4. The present cell holder 16 for receiving the battery cell 4 is preferably made of plastic and has a cooling channel 18 for cooling the battery cell 4. The cooling channel 18 is preferably arranged here between the battery cell 4 and the cell support wall 20. For the purpose of heat removal or as a heat transfer medium, a liquid, advantageously electrically non-conductive coolant, such as, for example, distilled water, water fluoride ether or a dielectric liquid, can in particular be introduced into the channel 18. In order to seal the channel 18 outwards, a sealing means 22 is also provided, which is arranged at least partially between the cell support 16 and the poles 6a, 6b of the battery cell 4. The sealing means 22 can preferably be formed from plastic, in particular from rubber or the like. In this case, the sealing means 22 can be designed and adapted to the cell holder, in particular, in such a way that the sealing means 22 remains sealed under any operating conditions, preferably over the entire service life of the present battery system 1. In order to adapt the sealing element 22, a fastening element 30, which is embodied in the form of a screw, is provided. In addition to the plurality of cell connectors 2 according to the invention for connecting the battery cells 4 in series, a parallel connection by means of an additional connecting element 28 is also provided in the present case in order to increase the charging capacity of the battery system 1. In addition to the connections currently designed in the form of tabs, such connections can also be designed in the simplest case in the form of cables or the like. For the introduction and extraction of the coolant, the cell holder 16 also has inlet and outlet openings 24a, 24b, through which the respective coolant can be introduced and extracted from the cell holder. The inlet and outlet openings 24a, 24b may preferably be designed in the shape of holes or the like and are arranged in particular between two battery cells 4 arranged next to one another and/or the battery cell connectors 2, respectively.
Fig. 5 shows a further schematic illustration of the battery system 1 according to the invention from fig. 4 with a representation of the gas distribution path 34. The cell gases formed during the operation of the present battery system 1 can be discharged to the outside via the channels 26 for gas discharge and for electrical connection, which are currently arranged in the cell holders 16, which ensures a stable, reliable and long-lasting connection of the battery cells 4. The channel 26 for gas discharge preferably extends at least partially through the recess 10 provided in the interior of the connecting element 2. By means of the arrangement of the channels 26, a parallel connection of the battery cells 4 can also be achieved by introducing a connecting device 28.
With the aid of the cell connector 2 according to the invention, the battery system 1 according to the invention and the method according to the invention for producing the present battery system 1, it is possible in particular to operate the liquid cooling device particularly efficiently, so that a high power capacity of the correspondingly cooled battery system can be achieved while ensuring a long service life. Furthermore, a high thermal reliability with a very low temperature difference is also achieved within the battery system by means of an optimal cooling. Furthermore, a particularly compact battery system design with a lower transition resistance can be achieved by means of the structure according to the invention.
Claims (11)
1. A battery cell connector (2) for connecting battery cells (4) in series, comprising
A first connecting element (2 a) for establishing a connection with a first battery pole (6 a) of a first battery cell (4 a),
a second connection element (2 b) for establishing a connection with a second battery pole (6 b) of a second battery cell (4 b),
it is characterized in that the preparation method is characterized in that,
the connecting elements (2 a, 2 b) are configured in a form-fitting manner relative to one another and can be connected to one another in series in such a way that the contact surface (8) surrounding the battery cells (4) can be maximized in order to ensure effective cooling of the battery cells (4).
2. The battery cell connector (2) according to claim 1,
it is characterized in that the preparation method is characterized in that,
a recess (10) for the removal of gas is provided, wherein the recess (10) is preferably arranged within the first and/or second connecting element (2 a, 2 b), in particular laterally within the first and/or second connecting element (2 a, 2 b).
3. The battery cell connector (2) according to claim 1 or 2,
it is characterized in that the preparation method is characterized in that,
the connecting elements (2 a, 2 b) can be connected to one another in a force-fitting manner, wherein preferably a thread (12) is provided for the force-fitting connection.
4. Battery cell connector (2) according to one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the connecting elements (2 a, 2 b) can be connected to one another in a form-locking manner, wherein a plug connection (14) is preferably provided for the form-locking connection.
5. Battery cell connector (2) according to one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
the connecting element (2 a, 2 b) can be connected to the battery cell (4) in a material-locking manner, wherein the connecting element (2 a, 2 b) is preferably weldable.
6. A battery system (1), comprising:
-a plurality of battery cells (4),
-a plurality of battery cell connectors (2) according to any of claims 1 to 5,
a cell holder (16) for accommodating the battery cell (4),
it is characterized in that the preparation method is characterized in that,
the battery cells (4) are arranged within the cell carrier (16) and are connected to one another in series by the battery cell connectors (2) in such a way that the contact surface (8) surrounding the battery cells (4) can be maximized in order to ensure effective cooling of the battery cells (4).
7. The battery system (1) according to claim 6,
it is characterized in that the preparation method is characterized in that,
a cooling channel (18) is provided for cooling the battery cell (4), wherein the cooling channel (18) is preferably arranged between the battery cell (4) and the cell support wall (20), and wherein the battery cell (4) is arranged in particular in the cell support (16) in such a way that the surface of the cooling channel (18) can be maximized.
8. The battery system (1) according to any one of claims 6 or 7,
it is characterized in that the preparation method is characterized in that,
sealing means (22) for sealing the cooling channel (18) to the outside are provided, wherein the sealing means (22) are preferably arranged at least partially between the cell support wall (20) and the poles (6 a, 6 b) of the battery cell (4).
9. The battery system (1) according to any one of claims 6 or 7,
it is characterized in that the preparation method is characterized in that,
the cell holder (18) has an inlet and an outlet (24 a, 24 b) for the introduction and extraction of coolant.
10. The battery system (1) according to any one of the preceding claims,
it is characterized in that the preparation method is characterized in that,
channels (26) for gas extraction and electrical connection are provided.
11. A method for manufacturing a battery system (1) according to any one of claims 6 to 10, the method comprising the steps of:
-a first material-locking connection is established between the first connecting element (2 a) and the first pole (6 a) of the first battery cell (4 a),
-a second material-locking connection is established between the second connecting element (2 b) and a second pole (6 b) of the second battery cell (4 b),
-establishing a force-or form-locking connection between the first connecting element (2 a) and the second connecting element (2 b) for connecting the first battery cell (4 a) and the second battery cell (4 b) in series.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019200349.4 | 2019-01-14 | ||
| DE102019200349.4A DE102019200349A1 (en) | 2019-01-14 | 2019-01-14 | Battery cell connector for the serial connection of battery cells |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111435726A true CN111435726A (en) | 2020-07-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010032179.4A Pending CN111435726A (en) | 2019-01-14 | 2020-01-13 | Battery cell connector for connecting battery cells in series |
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| Country | Link |
|---|---|
| CN (1) | CN111435726A (en) |
| DE (1) | DE102019200349A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022041541A1 (en) * | 2020-08-31 | 2022-03-03 | 中山市小万能源科技有限公司 | Battery |
| US11837753B2 (en) | 2020-08-31 | 2023-12-05 | Zhongshan Wan Energy Technology Co. Ltd. | Battery |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10003247B4 (en) * | 1999-01-29 | 2005-02-24 | Sanyo Electric Co., Ltd., Moriguchi | Power source, equipped with rechargeable batteries |
| US7381093B2 (en) * | 2005-05-17 | 2008-06-03 | Ykk Corporation | Covered snap-fit terminals for connecting storage cells together |
| JP5015455B2 (en) * | 2005-12-27 | 2012-08-29 | 株式会社エムアンドジーエコバッテリー | Connection structure between secondary cells |
| DE102018003174A1 (en) * | 2018-04-18 | 2018-10-04 | Daimler Ag | Storage device for storing electrical energy for a motor vehicle, in particular for a motor vehicle |
-
2019
- 2019-01-14 DE DE102019200349.4A patent/DE102019200349A1/en active Pending
-
2020
- 2020-01-13 CN CN202010032179.4A patent/CN111435726A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022041541A1 (en) * | 2020-08-31 | 2022-03-03 | 中山市小万能源科技有限公司 | Battery |
| US11837753B2 (en) | 2020-08-31 | 2023-12-05 | Zhongshan Wan Energy Technology Co. Ltd. | Battery |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102019200349A1 (en) | 2020-07-16 |
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