DE202018106768U1 - Energy storage that can be attached to a transport vehicle such as a cargo bike, a hand truck or the like, and an accumulator therefor - Google Patents

Abstract

Energy store (1, 22) for electrical energy, in particular as an energy source for an electric motor drive (16, 16), preferably a load transport vehicle (2, 4), such as a cargo bike (2), a stair climber (4), a load cart, a lifting truck or a hand truck (4), with a shaft (20, 20, 20) and with a sliding battery (24) which is matched to the shaft (20, 20, 20) and consists of an electrically connected array (84) of battery cells (88, 88, 88), in particular lithium ion cells (86), and optionally from an accumulator electronics (110) with which at least one of the accumulator parameters temperature, voltage and current, in particular an accumulator cell surface (90, 92), an exemplary accumulator cell Ambient temperature, a set of temperatures of battery cell surfaces (90, 92) and / or of battery cell ambient temperatures, a battery cell voltage, a total voltage of the Ar rays (84) and / or a total current of the array (84), is measurable, is assembled in a bowl-shaped housing (30, 34), and with a plug system (118) comprising a plurality of plugs (131, 132, 133, 134, 135, 136, 141) and optionally with a grip surface (50) which closes the accumulator (24) on one side and which connects one of the plugs (131, 132, 141), in particular a first plug (131), on an opposite side (26) of the housing ( 30) and which extends to the transversely aligned guide surfaces (51, 52, 53, 54) on the housing (30), characterized in that at least one first plug (131) has a contacts (161, 162, 163, 164, 165, 166) ) for electrical energy and control signals combining connector (131) with at least five or six contact spacings (151, 152, 153, 154, 155), wherein contact surfaces (161, 162, 163, 164, 165, 166) of the first connector (131 ) span a common plane (170).

Description

The present invention relates to an energy storage device with a shaft, which can be attached to a transport vehicle such as a cargo bike, such as a stair climber, such as a goods cart, such as a pallet truck or as a hand truck as an energy source for a person power-supporting electric motors.

Furthermore, the present invention deals with an accumulator which can be used as part of the energy store in the latter and which can also be replaced by a similar accumulator.

In other words, the present invention deals with an electrochemical energy store according to the preamble of claim 1 and an accumulator based on electrochemical processes according to the preamble of claim 13.

Technical field

Transport vehicles are used to support the transport of a load, such as several stacked or arranged packages. Such transport vehicles are available as frames, often composed of pipes, with unsprung wheels, such as, for example, which are adapted to the different applications. B. in the form of cargo bikes, but also in the form of stair climbers, goods carts, pallet trucks and hand trucks. In particular, in order to provide power support to the user of the transport vehicle as required, transport vehicles are equipped with energy stores and motors that support the drive or propulsion.

If the transport vehicle is a cargo bike, it is often designed in such a way that it can not only carry the cyclist using the bike, but also has storage, receiving and / or storage areas for additional loads such as packages and parcels . Due to the additional weight of the loads to be transported by bicycle, commercial delivery services, generally in the professional field, ie bicycle carriers, like to use pedal bikes. As a rule, a smaller electric motor belongs to the cargo bike, which introduces additional drive power in a rotating manner, often in the area of the pedal crank or on the bicycle chain.A variant of a cargo bike is simplified by its bicycle frame without a saddle and without additional attachments in the EP 3 205 564 A2 (Applicant: Herbert Weber; publication date: August 16, 2017) is shown graphically. From those figures of the EP 3 205 564 A2 which show the bicycle frame with the loading platform opened, it can be seen that the batteries or accumulators used to deliver the pedaling energy are to be set loosely in a bowl-shaped housing section of the bicycle frame.

Other transport vehicles are e.g. B. those that should be helpful when transporting parcels and other loads over stairs or on factory premises. Examples of such transport vehicles are in the US 3 907 138 A (Patent holder: Woodard Mfg. & Sales Co., Inc .; publication date: September 23, 1975), the EP 2 261 167 B1 (Patent owner: Jungheinrich AG; publication date: January 23, 2013) and the DE 20 2007 019 691 U1 (Utility model owner: Movexx Inter. BV; registration date: July 27, 2015).

In the course of time, the world of standards increasingly leads to requirements regarding constructive measures and inherent (design) measures of safety. As an example, DIN EN 15194: 2017 may be mentioned. Then comes that a negligent storage of the batteries, especially with higher energy densities such. B. for cargo bicycles, there are special measures to reduce the risk to be taken. If the same accumulators are installed on the other transport vehicles listed above, they must also be designed there in accordance with the standards. It would therefore be advantageous if special safety precautions and precautionary measures in connection with the accumulator or the accumulators were taken by the design of the accumulator unit or the energy store.

State of the art

From the area of recreational bicycles with accumulators, the so-called e-bikes and pedelecs, various suggestions for the design of accumulator housings, of entire energy stores and for their attachment and for their attachment to a bicycle frame can be found. Some of the numerous variants are briefly presented below.

From one of the figures of the EP 1 092 826 B1 (Owner: Honda Giken Kogyo Kabushiki Kaisha; filing date: October 13, 2000) shows that a battery can be designed for insertion into a housing, the battery ideally having a handle for this process. The housing is formed on all sides by a kind of hollow profile. Near the handle there is an operating lever on the housing, which allows the battery to be locked in a recess, the There is a recess at an end of the battery opposite the handle.

According to the EP 2 738 080 B1 (Owner: Honda Motor Corp. Ltd .; filing date: July 19, 2012). B. in their 12th is shown, a battery designed so that it can be inserted into a U-shaped rail. To lock the battery, there is a hole for a lock (lock pin 262) of a lock, the hole being near a handle. Electrical connections or contacts are arranged on an end of the battery opposite the handle. The battery must be slid in front of the guide rail along this, more precisely on the edges of the rail.

Similar fastening and arrangement concepts are also in the EP 0 822 135 B1 (Owner: Yamaha Hatsudoki Kabushiki Kaisha; filing date: July 31, 1997), in JPH 0 740 877 A (applicant: Yamaha Motor Co. Ltd .; filing date: July 26, 1993) and in JP 2001 088 769 A (Applicant: Yamaha Motor Co. Ltd .; filing date: September 21, 1999).

In the EP 0 728 662 A2 (Applicant: Yamaha Hatsudoki Kabishiki Kaisha; filing date: February 23, 1996) is related to the battery holder 3rd spoken of an inner box and an outer box, the inner box having electrical contacts in its bottom region. There should be a foldable lever on the outer box and the lid of the outer box should be closable.

In the US 6,423,443 B1 (Patent holder: Honda Giken Kogyo Kabushiki Kaisha; filing date: May 25, 2000) describes that a battery can be fixed to a seat post of a bicycle with a retaining bracket in an upper area.

In the EP 2 280 436 B1 (Patent owner: Suzuki Motor Corporation Shizuoka-Ken; filing date: July 30, 2010), who, according to the patent name, is dedicated to a removable battery pack for electric vehicles, also deals with a locking mechanism in which one end of the battery opposite a handle has to be locked with a pin . The EP 2 280 436 B1 focuses on the vehicle type "electric scooter" and tries to offer an energy storage solution for this vehicle type.

The patent application JP 2002 170 537 A (Patent owner: Sanyo Electric Co Ltd .; filing date: June 14, 2002) should show a more antiquated development stage of a battery arrangement with handle and contacts compared to the illustrations in the publications listed above. That is, compared to the JP 2002 170 537 A the progress in design can be seen very well in the design of battery housings.

Some documents can also be found in the property rights literature that deal with batteries for electric bicycles that are to be inserted into the level of a luggage rack of the respective bicycle.

In the DE 20 2017 107 506 U1 (Owner: Dongguan Hong Lin Industrial Co., Ltd .; registration date: 11.12.2017) B. in 3rd a battery box shown, which can be inserted into a receiving frame on a slide using a handle. The mounting frame shown is U-shaped, ie the holding frame holds the battery box on the longer narrow sides. At one end of the battery box opposite the handle is a set of connections and a retention area, the retention area being lockable with a rotary hook. The rotary hook is located on a control box. The shape of the receiving chamber has a very special, striking appearance. In connection with the handle, the figures show no possibility of fixing, ie the accumulator is probably held in position exclusively by the rails.

In the DE 20 2010 008 304 U1 (Owner: P. Ronge; filing date: August 17, 2010) describes a housing that, as in 1 is shown to be put on a luggage rack. Although the housing is described as a box with a U-shaped cross-section that is open at the bottom, this cross-section that is open at the bottom is intended to be a fit for two V-shaped, upwardly diverging, open struts. The description also speaks of complementary electrical contacts of the housing. The housing is designed with a handle. However, the description does not seem to deal with how to ensure secure contacting. The fear can be expressed that the housing has no measure against displacement in one direction.

The documents CN 205 801 406 U (Owner: Zejiang Goccia Electric Technology Co. Ltd .; filing date: June 22, 2016) and JP 2001 247 069 A (Applicant: Mitsubishi Heavy Ind. Ltd .; filing date: June 12, 2000) each show a battery housing that should be mountable on an intermediate level between the actual luggage rack and the rear wheel. According to 5 of the JP 2001 247 069 A the battery housing has at least one handle.

In addition, a lockkey is mentioned in the description, which is supposed to represent an anti-theft device. This should also ensure that the battery housing is secured in position. Both Documents do not appear to provide any additional battery receptacles for the battery case.

The names of the aforementioned publications are fully incorporated in the present description of the invention. This is to avoid discussing again and again generally known relationships between the housing, frame mounting, battery alignment and other customary matters in connection with bicycles, but rather to be considered as also defined for the present invention by reference to the documents.

Task

After a review and examination of accumulators attached to bicycles in the past, especially based on lithium-ion cells, which are often installed as round cells, have shown that these should not fully comply with the current standards, other solutions for accumulators are necessary , especially for those to be attached to bicycles. It should be borne in mind here that accumulators for cargo bicycles generally have a certain volume and a certain mass, so that a previously usual “saddle bar” installation location can be regarded as a rather unsuitable solution. In addition, cargo bikes are used much more frequently and intensively than many leisure bikes. The cargo bike riders rely on the fact that their cargo bike to be used is equipped with batteries that are sufficiently charged at the beginning of every major bike tour. Complicated and time-consuming charging processes should be avoided as far as possible. For the couriers using the cargo bikes, the focus is on being able to concentrate on their messenger activity, ergo they want to spend as little time and effort as possible in the maintenance and care of the drive assistance system.

If a suitable energy storage device were known, it would also be possible to install it in comparable load devices such as stair climbers and hand trucks, especially since some of the load transport devices listed cannot offer an assembly location that is already based on its position, i.e. H. offers a certain amount of protection for the user of the device.

There is therefore a need for a technical solution by means of which energy stores for transport vehicles, in particular for cargo bicycles, stair climbers and lifting carts or goods carts, can be made available which are as safe as possible for the regular, often not particularly caring use.

Description of the invention

The object of the invention is achieved by an energy store according to claim 1, a suitable accumulator is dealt with in claim 13. Advantageous further developments can be found in the dependent claims.

In order to increase the required safety through the energy store and / or the accumulator, special measures have been taken on various components, components and assemblies and in the interaction of these components, components and assemblies, which is explained in detail below in individual component groups.

The energy store comprises several components and assemblies and is designed for mounting on a support element such as on a luggage rack, in particular a flat, preferably trough-like, receptacle or on a cross member of the transport vehicle. The energy store can advantageously have a block-like appearance, i. i.e., it has (predominantly) a cuboid core and thus offers (essentially) larger and smaller sides arranged in a rectangular manner with respect to one another. One of the largest sides of the energy store is for mounting the energy store on one, preferably in the rear area, for. B. the cargo bike available, luggage rack or designed on a frame of a stair climber or an electric hand truck. A shaft of the energy store and part of a carrier, such as. B. a luggage holder or the luggage rack of the cargo bike, can be connected lying flat on top of each other to connect the components and thus install the energy storage on or in the transport vehicle.

One component of the energy store is an accumulator. The battery in turn includes other (individual) components and assemblies, such as a shell-shaped housing.

For the electrical integration of the energy store in the drive (auxiliary) (pedal) system, the energy store has a plug-in system, at least one cable from one of the plugs of the plug-in system, in particular via strands of the cable, to one on the cargo bike, the stair climber or on the, in particular electrically driven, hand truck arranged drive motor, such as. B. a synchronous motor is continued. In other words, the plug system includes at least two plugs, the plug system of the energy store advantageously even comprises more than two plugs, in particular one of the plugs being present in the wiring harness and / or in the electrical arrangement for forwarding to an electric motor.

As already mentioned above, part of the energy storage is a receiving shaft. The receiving shaft can also be referred to as the first, outer housing, although a housing does not have to be completely encompassing (by itself). Another housing is part of the battery. The two housings, outer housing or receiving shaft and inner housing or accumulator housing, are dimensionally matched and matched to one another by their surface shape. As a result, the accumulator can be pushed into the shaft of the energy store.

The energy storage is part of the drive system or the auxiliary drive system of the transport vehicle (such as the bicycle). The energy store supplies the necessary drive energy to the (auxiliary) motor of the transport vehicle. In addition, cables or lines are present in the bicycle, via which the electrical energy and, if appropriate, additional information about the drive, the energy store, the cells of the accumulator and / or the operating states of the overall system can be transmitted.

It can also be said that the accumulator is part of the energy store. The receiving shaft of the energy store and the accumulator are matched to one another. It is advantageous if several batteries are to be counted for one energy store. If an energy storage device is designed in such a way that an individual storage battery can be removed from the energy storage device, the storage battery can be replaced by a comparable, similar storage battery which, for. B. is electrically charged. In this way, the batteries can be replaced quickly. By inserting an accumulator into the energy store, further energy is presented to the drive system of the transport vehicle (cargo bike). This enables a quick, swift exchange between accumulators; It can be emphasized that the cargo bike maintains its functionality or regains it at short notice.

Individual cells are present in the completely enclosing housing of the accumulator. Lithium-ion cells as part of the accumulator are advantageous. Several such lithium-ion cells can be arranged next to one another in the housing of the rechargeable battery. Due to the many years of experience with round cells, whereby it is emphasized that the specific dimensions are not important for this statement, lithium-ion round cells are arranged in an array inside the bowl-shaped housing of the battery and connected electrically. Suitable cells are e.g. B. the cells of type 18650 and type 21700.

The foregoing can also be summarized to the effect that the energy store comprises a shaft and at least one accumulator that can be inserted into this shaft. The outer dimension of the accumulator is matched to the shaft. The accumulator has surfaces which are shaped in such a way that the area of the inside of the shaft intended for contact runs or what its internal shape is. The accumulator is pushed into the shaft in order to become part of the drive system of the transport vehicle (cargo bike) in its inserted position.

If the energy store is provided for mounting on a cargo bike, the shaft is advantageously designed for attachment in the direction of travel of the cargo bike. The shaft has a longest extension that can be positioned in the direction of travel. The shaft is intended to be attached with one of its outer sides to an underside of the loading area of the cargo bike. The shaft is advantageously several times narrower than the, as a rule, two-wheel rear axle of the cargo bike. It is thus possible to attach a plurality of energy stores side by side to form a (total) energy store combined on load-bearing components of the cargo bike.

At least on its inside, the shaft is provided with shape-forming or shaping courses. The accumulator is - so to speak - in its housing a negative to the inside of the shaft.

If, after considering the interior of the shaft and the form-fitting surface shape of the inside of the shaft and the battery, further work with the energy store and its battery in the direction of the interior of the battery is continued, an battery comprises an array of battery cells. A larger number of battery cells, such as. B. 50 accumulator cells, 75 accumulator cells or even 100 accumulator cells are electrically connected to each other to form a "total accumulator pack". Through an electrical connection of the individual battery cells, which are combined to form an array, the battery offers a higher terminal voltage than the open circuit voltage of the battery cell. The current available from the battery can be increased by connecting a plurality of battery cells in parallel. An array of accumulator cells advantageously includes a plurality of accumulators which are connected to one another in series. An array of battery cells also includes a combination of several battery cells that are connected in parallel.

The battery cells are arranged in a housing protected from the environment. The housing consists of several sub-housings, preferably the housing consists of two sub-housings. Each sub-housing provides a shell for receiving a part of the individual battery cells. So it is possible to join two shells to a complete housing. The housing consists of several bowl-shaped individual housings.

The energy storage also includes a plug-in system, which at least - as already mentioned in the introduction - includes two plugs. If more than two plugs become part of the energy storage device, the flexibility for and through the energy storage device increases, while at the same time maintaining increased security for the user of the energy storage device.

The plug, which is located directly on the outside of the rechargeable battery housing or is even part of the housing of the rechargeable battery, can be referred to as the first plug. This plug not only flows the energy for driving the cargo bike, but the plug also has individual contacts via which control signals can be transmitted. There are contacts in one and the same plug, which are available for different outputs. A control signal with a lower output is passed through the connector in the same way as an electrical signal or an electrical current flow with a higher output. The plug combines contacts that perform different tasks. The contact spacing is advantageously all the same, although there are different types (especially in terms of use) of contacts in the connector. The distance between a contact and the next contact (e.g. from the first contact to the contact in the immediate vicinity of the first contact) is determined as the contact pitch. If individual contact distances are considered, the first connector offers at least five, possibly also six or even more than six (in particular identical) contact spacings. It is particularly advantageous if all contacts of a plug are actually used, i.e. that is, if there is a position in the connector after each contact pitch where there is actually a contact. If the connector has six (6) contacts, there are five contact spacings, all of which are advantageously of the same size.

The safety during the operation of the energy store as an energy source for a transport vehicle such as a cargo bike can be increased further if there is electronics in the accumulator that performs at least one of the following functions, namely on the one hand the function “monitoring one or more accumulator parameters” and / or on the other hand the function "passive or active switching of one of the tiller or one of the contacts of the plug". The accumulator electronics are advantageously arranged in the interior of the accumulator. The accumulator electronics can be installed in the interior of the accumulator as electronics supplied by the accumulator cells. The battery electronics are advantageously equipped with a measuring device.

Suitable parameters for characterizing, labeling or determining a “health status” of an accumulator are parameters such as temperature, current and voltage. The battery electronics can be designed to measure a temperature. The battery electronics can be designed to measure a voltage. The battery electronics can be designed to measure a current. For example, the battery electronics can be designed to measure (several, in particular different) temperatures of the battery or of the energy store (e.g. individual temperatures on individual battery cells; e.g. an internal or external temperature of the housing, a (representative) total temperature of the It is also possible that the battery electronics for measuring a voltage of a part of the battery cells (cell voltage), a group or a higher battery cell voltage, one available from the battery Total voltage, a current at one point in the interior of the accumulator or a total available current, and a hodgepodge of individual, measured currents.

The operation of the rechargeable battery, in particular if it is to be pushed into or out of the shaft, is simplified if the rechargeable battery comprises an area that is a surface or shape that can be used as a handle, such as a bulge. In the area of a handle surface or a handle, a user of the transport vehicle (the cargo bike) or an employee responsible for the maintenance of the transport vehicle can move the battery arranged in the shaft and - ideally - carry it around with the aid of the handle. It is therefore advantageous to have a handle which is arranged on one side of the accumulator, preference being given to that side which remains accessible after being pushed into the shaft (for example the end face).

The first connector creates the transition from the inside of the battery to the other components of the cargo bike. The plug can advantageously be found on the side opposite the grip surface or the grip. The plug is only difficult to access, (accidental) touch by a user is avoided.

The shaft can also be referred to as a hollow body equipped with a plurality of sliding rails. The rails of the shaft of the energy store covering a part of the width of the accumulator offer smooth surfaces for sliding over or pushing the accumulator along the surface. The inside of the shaft has shear areas. The accumulator offers the mirrored push surfaces. The thrust surfaces are aligned transversely to the intended thrust direction of the accumulator housing in the shaft. The accumulator cannot swing or move back and forth arbitrarily. The battery is in a stable guide, which contributes to safety.

If the consideration is now focused on the accumulator that is suitable for completing the energy storage device, then a grip area or a grip, in particular on one side of the accumulator housing, and a plug, in particular, attract attention (when viewed from the outside) exactly the opposite part of the housing, as well as several special push surfaces. So z. B. four parallel thrust surfaces are part of the battery case. Forces introduced via the handle or the grip surface reach the contacts of the connector. The introduction of lateral forces is reduced as much as possible. An unsafe contact due to bent contacts or through not closed contacts should not occur.

The accumulator is a battery made of parallel and / or serially connected current storage devices. These individual accumulator cells are advantageously aligned parallel to one another. Several (individual) power stores are interconnected in parallel, while, in particular others, power stores are interconnected in a serial arrangement. The battery cells are combined to form an array in which battery cells are connected in parallel with one another and in which battery cells are connected in series. Each battery cell belongs to a group of several battery cells. The block-like arrangement of the battery cells ensures increased security through stability and stabilization.

The individual battery cells are placed in a right-angled arrangement between the first side of the battery housing and the second side of the battery housing, the two sides being determinable by the handle or by the surface provided as a handle and the plug. All accumulator cells are advantageously arranged parallel to one another. The battery cells are lined up from one side of the housing to the other side of the housing of the battery. There is a connector on one side that has more than four (4) contacts.

It is particularly advantageous if there is no further connector on the housing. In other words, there is a single connector through which both the energy in and out of the accumulator is conducted as well as communication signals. A reduction in the number of plugs on the accumulator leads to an increase in security, e.g. B. the contact security. It is also advantageous if there is only one handle on the battery housing. It can also be said that on one side of the battery housing is this connector, which can also be referred to as a central connector. On the other side of the battery case is the handle of the case.

In addition, it is advantageous if the plug is not exactly central, i. H. is arranged in the middle of the page, but in an edge area. Such an eccentric connector can find its intended position near the shaft housing. Distortion distances over the accumulator housing are kept short. The plug is advantageously located in the lower left corner of the battery housing. This positioning increases safety because the risk of transverse forces is further reduced.

It also contributes to the safety that the individual contacts of the plug are all level. None of the contacts go beyond one level. All contacts reach a common level. A simultaneous contacting of all contacts, in particular avoiding voltage arcs, is ensured.

Advantageous refinements and developments are set out below which, viewed individually, both individually and in combination, can likewise disclose inventive aspects.

Not only does the first connector belong to the energy store, but the plug system also has at least one mating connector, which is the mating connector to the first connector. The mating connector is attached to the inside of the shaft. The mating connector is preferably located in an end region of the shaft. The battery can thus be fully inserted into the shaft. The shaft is at least longer by the length of the mating connector than the accumulator with its first connector. The mechanically fixed mating connector, which is attached to the shaft, is also an end stop for the first connector and thus for the accumulator. The accumulator can be pushed in as far as it will go. This positioning through Plugs and mating plugs help to increase operational safety.

Plugs and mating plugs are advantageously configured in pairs. The connector and mating connector are designed in the same way. It is particularly advantageous if all contacts of the connector and all contacts of the mating connector are each designed to be safe to touch. Should a user of the energy storage, e.g. B. a person carrying the accumulator, with his fingers either on the plug or on the mating connector, advantageously no conductive connection is established between the exterior of the connector or the mating connector on the one side and the respective contacts within the connector on the other side. The connector or mating connector is safe to touch.

The advantages of the plug can be increased even further if the plug is designed to be polarity-independent. If the connector has a coding, but does not encode a specific polarity, but instead positive and negative potentials are determined on the basis of individual pins or contacts of the connector, which are all identical or even identical to one another, the result is polarity independence. Only by introducing the potential to the connector on the inside of the connector, e.g. B. via cable or one or more conductor tracks, the respective polarity of a single pin or contact results. It is also advantageous if the contacts are not designed depending on the current flow direction. In other words, a single contact can be designed both for a direction of current closure from the plug and for a direction of current flow into the plug. Both a contact for a current flow direction from the plug and a contact for a current flow direction into the plug can advantageously be identical.

It is particularly advantageous if all contacts of all plugs of the energy storage system are constructed in the same way. So it is possible that all contacts of all plugs can be designed independent of polarity and also independent of current flow.

In addition to the actual receiving space for the accumulator, the shaft can also have a further compartment. Such a compartment can be designed as a charging plug compartment. Such a compartment can z. B. along the shaft or along the sliding direction within the shaft or the accumulator in the shaft. The sliding direction of the accumulator and the longitudinal extent of the compartment are preferably aligned in parallel. In such a case, the compartment is an elongated, thin arrangement which runs parallel to the sliding direction or pulling direction of the battery, the compartment in particular offering space for additional, upstream electronics.

The electrical connections to one another can be designed such that an electrical connection, for. B. exists on a cable. If the compartment should be able to be uncoupled from the accumulator, it is advantageous if the mating connector and plug (in an electrical sense or from the point of view of the energy flow in a charging mode) are located behind the compartment.

The compartment can be intended to control and regulate electric charge flows (electric currents) and charge modes of operation. It is thus possible to establish a charging operating state of the battery via individual electrical contacts with the aid of the compartment. In this way, electrical charging flows can be continued. A compartment, if it is connected upstream of the plugs of the first plug and mating plug as a compartment for the control of charging operating states, represents an additional safeguard for the energy store.

A lock can be provided for better alignment and securing of the accumulator in the shaft, so that the energy store is created overall. The lock can lock the accumulator with the shaft. The lock is suitable for locking the accumulator in the shaft. For this purpose, the lock has a force-introducing mechanism which, for. B. can be arranged laterally. By introducing a transverse force, it is possible to prevent the battery from slipping out of the mating connector. If the locking z. B. arranged on a side facing away from the connector, a contact torque can be generated which is dimensioned sufficiently strong, although the force introduced laterally is located in a single-digit Newton range, for. B. at only 5 Newton or possibly also at 6 Newton, that is below 10 Newton. The contacting of the plug can be ensured by using the leverage effect via the housing of the accumulator. Despite a small force effect at one end of the accumulator, the lever-strengthened moment, which acts on the plug and the mating plug, is sufficient to ensure reliable contacting.

The front area of the rechargeable battery or of the energy store can be used even further than just, as mentioned above, as a grip surface. So it is possible that the battery merges into a grip on the one hand, on the other hand, the battery can have a display for information to a user at that point, the front. Is then in addition to the actual accumulator Front area of the energy store, e.g. B. in the vicinity of the handle of the rechargeable battery, a plug socket is provided, into which a charging cable can be plugged in, so even when installed, the rechargeable battery can be electrically charged via this so-called "charging socket" or via this so-called "charging plug", although the The battery remains unchanged in its inserted position in the shaft. As a further measure of safety generation, a cover can come to rest on the contact socket, which must first be removed before the accumulator can be charged via the contact socket.

In one embodiment of the accumulator, it is provided that the plug is designed as an elongated plug with different contacts. It is possible to connect the power contacts, i.e. H. to locate those contacts through which the greatest current flows at the outer end of the elongated plug. If the array supplies a correspondingly high voltage, e.g. B. more than 48 volts or even more than 60 volts, can be generated by the spacing generated by means of contact spacing, which is thus formed by intermediate contacts, a higher dielectric strength. Greater spacing also helps to create better thermal uniform distribution. For example, one embodiment provides for placing four different types of contacts between the power contacts, one of which has a power contact at the outer end. About the middle contacts z. B. data communication. A significantly higher power current flow can take place via the external contacts. Physically, all contacts can - advantageously - be configured identically. The contacts can therefore be identical in terms of their dimensions. It is possible to leave the distance from a first contact to a second contact between all contacts of the plug the same. The same distance can be found in the connector from one contact to the next. Experiments have shown that a fixed dimension with a distance between 7 mm and 8 mm is a favorable dimension (in the sense of a contact grid or a contact grid spacing).

The plug itself can be equipped with an outer shell, in the interior of which the individual power contacts and the contacts for data communication are arranged. The outer shell can be a welded, e.g. B. ultrasonically welded, shell. The connector is a flat plastic connector, especially if all contacts are arranged next to each other in the same row (single-row connector).

The housing of the plug, which in an advantageous embodiment, for. B. is shell-like, can either be equipped with a protruding pin or with a recess, such as a slot running into one side of the housing, which can be used to express the voltage for which the plug is designed. In addition, a voltage value can be specified on the connector, e.g. B. by protruding numbers, produced by negative in a mold of the connector housing. By releasing or blocking a coding pin when merging a plug and its mating plug, both plugs can be fitted in a matched manner to one another or prevented from being plugged together. The fit offers a coding, which determines the voltage level of the power tiller or power contacts.

In an advantageous development, all contacts of a plug can be equipped with a male area as well as with a female area. Every contact is a hermaphrodite contact, so to speak. A first part of the connector has a male area and a second part of the connector has a female area. In this case, the two different regions can be divided into their male region and their female region approximately at half of the area occupied by the end face of the contacts, in particular at approximately half the height of an end face of the contact. In this way, each individual contact can essentially be divided in half. Half is the male part of the contact and the other half is the female part of the contact.

In a further development of the connector variants shown above, it is also possible for each connector, but at least the first connector, to have individual contacts, ie. that is, each contact can be recognized by a next contact as a separate, spatially closed contact. As a result, crosstalk behavior, current breakdowns, voltage breakdowns and undesirable mutual influences are prevented as far as possible, or at least reduced. Misconduct, in particular caused on the first connector, is less likely.

Each of the individual contacts can be configured block-like. An electrically conductive, resilient connection, such as a copper tongue or a pin with a tin-plated conductor, can be present inside the individual contact. The outer shell of the individual contact is a, preferably non-conductive, solid body, in the interior of which, for. B. copper tongue is present.

So that the corresponding opposite of the mating connector can be inserted into the first connector - or generally speaking into the connector - it is advantageous if the opposite side is U-shaped is enclosed, especially the male area of the mating connector. In one possible embodiment or design of the plug, a space adjoins a male area, which is closed off by a U-shaped boundary.

The contact security is further increased if the individual contact is designed to be electrically conductive only in certain areas, the points at which the individual contact is electrically conductive cannot be touched directly by frontal contact. Only the block-like male parts of a contact made of non-conductive material such as plastic can be touched from the outside.

Part of the electronics of the accumulator can be switches which contribute to the fact that current flows are switched on or interrupted, in particular on the way to or from one of the plugs. So it is possible to switch contacts and tiller of the individual plugs without power, e.g. B. in the event that the accumulator is not completely pushed into the shaft until it is securely locked via its connector with the mating connector to a further cable or a further conductor tracks.

As already explained above, the first connector has power contacts. In addition, the first connector can have contacts for serial communication. A variant of serial communication is communication according to a CAN bus protocol. Here, in the vicinity of the plug, for. B also directly in the connector, a driver IC for serial communication, z. B. a CAN bus transceiver. Alternatively, the battery electronics can be used for such a driver IC. The serial communication can be forwarded via a cable harness.

The accumulator has an interior with accumulator cells and possibly electronics. The battery is limited on the outside by its housing, which, for. B. can be produced by a plastic injection molding technique.

The edges of the accumulator can be designed with ridges. These draws can be placed as push rails or sliding bodies on push rails of the shaft.

It is suitable to line up 18 mm in diameter or 21 mm in diameter round cells, which are in particular cylindrical and are referred to as 18600 cells, as 18650 cells or as 21700 cells, in the interior of the accumulator.

The cells can be kept apart by filling pieces. The fillers can also align the cells parallel to each other. In one embodiment, the filler is sleeve-like. The accumulator cells are fixed. Loads on the housing of the battery due to impulses from wandering battery cells are reduced.

It is also advantageous if a power button or a user interface is still available, which, for. B. protected by a handle, arranged on the front for immediate viewing by a user.

The combinations and exemplary embodiments described above can also be developed in numerous other connections and combinations.

The accumulators mentioned above can be equipped with nominal electrical capacities of more than 10 amp hours (10 Ah), at a voltage level between 36 volts and 60 volts. For (auxiliary) drives on cargo bikes, it has been shown that stored amounts of energy from 500 watt hours to 2000 watt hours are practical and useful.

The system according to the invention offers increased flexibility in the operation of the drive system. There are various energy supply paths and options. So it is also possible, at least for a short time, to take the accumulator out of the shaft and the motor-driven or supported device, such as a stair climber, from a mains supply, e.g. B. to be supplied by a voltage supply device. In a particularly easy-to-implement application, the mating connector, that is, the connector which is installed in the shaft as a connector to the connector of the accumulator, is connected directly to the charger. The plug of the charger and the plug in the slot, which is also referred to as the mating connector, are matched to one another. It is advantageous here if the shaft leaves enough space for the charger to be “sunk” into the shaft. The plug of the charger and the plug on the battery are essentially the same, if not the same. The charger then only works as a power supply device. Alternatively, it is also possible to charge the rechargeable battery when plugged in via a cable using a charger.

As can be seen in some of the figures discussed below, the shaft is completely closed on three of four sides. The opened page, i.e. H. that side, which has at least partially a recess, can be used for easier cooling or heat dissipation by convection; which in turn contributes to increasing the security of the energy supply system.

Figure list

• 1 ein erstes Lastentransportvehikel, genauer ein Lastenfahrrad zeigt,
• 2 ein zweites Lastentransportvehikel, genauer eine Sackkarre zeigt,
• 3 ein Energiespeicher- und -versorgungssystem mit einem entsprechenden Energiespeicher zeigt,
• 4 einen Energiespeicher mit Kompartiment in einer Schnittansicht zeigt,
• 5 eine erste Ausführungsform eines in einem entsprechenden Energiespeicher verwendbaren Stecker mit Gegenstecker zeigt,
• 6 einen Stecker in Frontansicht zeigt und
• 7 einen Stecker in Schnittansicht zeigt.

The present invention can be understood even better if reference is made to the accompanying figures, which exemplify particularly advantageous design options, without restricting the present invention to these, wherein

• 1 a first cargo transport vehicle, more precisely a cargo bike,
• 2nd shows a second load transport vehicle, more precisely a hand truck,
• 3rd shows an energy storage and supply system with a corresponding energy storage,
• 4th shows an energy store with compartment in a sectional view,
• 5 1 shows a first embodiment of a plug with mating plug that can be used in a corresponding energy store,
• 6 shows a connector in front view and
• 7 shows a connector in sectional view.

Figure description

The 3rd and the 4th show an energy storage and supply system 1 in two different views. Such an energy storage and supply system 1 can be used to supply energy to a load transport vehicle 2nd like a cargo bike (see 1 ) or a load transport vehicle 4th like a hand truck (see 2nd ), in particular its (auxiliary) drive on such a load transport vehicle 2nd , 4th be attached.

This in 1 shown cargo bike 2nd includes a load area 6 , a saddle 8th a driver can sit on, a handlebar 10th , which has a handle on the left and right, and two (rear) wheels 12, 12 ^I . Where the load area is 6 is a shaft 20 ^I. available. This shaft 20 ^I. can also be used multiple times on the cargo bike 2nd be mounted. The shaft 20 ^I. is intended to be part of an energy store 22 (see e.g. 3rd ) to be. The energy of the energy storage 22 can be via cables or strands of a cable (cf. 4th ) to a drive motor 16 be guided via a drive hub 18th at least one of the wheels 12th , 12 ^I can drive.

In the 2nd shown hand truck 4th also has a load area 6 ^I that is close to the wheel 14 located. Over the handlebar 10 ^I with a suitable handle the hand truck can 4th be dumped. So that the hand truck moves 4th for a user (not shown) there is a drive motor 16 ^I which is a drive hub 18 ^I drives, the drive hub 18 ^I the wheel 14 can support with power. Part of the locomotion energy is through the handlebar 10 ^I on the bike 14 brought in. Another part of the energy that is used for locomotion comes from the shaft 20 ^II , in which a charged accumulator (not visible in the view) is provided.

In the 3rd and 4th is the energy storage and supply system 1 in a plan view from below (see 3rd ) and shown in a sectional view (also cut in the lower half shell).

The energy storage and supply system 1 consists of a shaft 20th and an accumulator 24th together. As long as the lock 62 that in the handle 48 of the accumulator 24th is integrated, not the accumulator 24th with the shaft 20th has locked, can shaft 20th and accumulator 24th relative to each other in the push or pull direction 200 be moved. Part of the shaft 20th is the compartment 60 . The compartment 60 is on the side of the actual shaft 20th appropriate. The shaft 20th has four corner areas 38 , whereby the inserted accumulator 24th left and right of its broad sides is bordered. The accumulator 24th has a first page 26 and a second page 28 . In the area of the first page 26 of the accumulator 24th is the handle 48 with its grip area 50 . Under the handle 48 , on a wall of the battery 24th is the control surface 44 with an operating status display 46 , which is realized by several LEDs. Also belongs to the control surface 44 a power button 42 . The energy storage 22 , which is particularly safe because the accumulator 24th in the inserted position on three sides through the shaft 20th has locked in its locked position when the latch 62 gripped, a completely secured, explosion-proof position due to the metal housing of the shaft 20th . However, one side is partially open, which means that pressure waves can be reduced in a controlled manner, namely in the open direction of the shaft.

Should the accumulator 24th out of the shaft 20th along the direction of the train 200 the trigger must be pulled out 64 through the introduction of lateral force 204 to be triggered.

The accumulator 24th has four drawbacks 36 . The deceits 36 are in their shape on the guide surfaces 51 , 52 , 54 Voted.

The accumulator 24th consists of half shells 34 together to which the housing division 40 can be seen. The battery case 30th of the accumulator 24th thus has two half shells 34 .

The compartment 60 is a charging connector compartment to which a charger is attached 74 via a charging cable 76 can be connected. A charging plug 72 can into the charging socket 70 be put in. Returns the charger 74 a current through the charging cable 76 into the compartment 60 into the other end of the compartment 60 the current flowing out to the accumulator 24th continue to flow.

In the 4th shown sectional view of the accumulator 24th shows numerous components, such as the round cells 86 , 88 , 88 ^I , 88 ^II designed battery cells, partly through a serial connection 102 and partly through parallel connections 104 are interconnected. The accumulator cells like the accumulator cell 86 are lithium-ion cells. In other words, all cells 86 , 88 , 88 ^I , 88 ^II are round cells based on lithium ions with one cell base 90 and a respective outer surface 92 . The round cells 88 , 88 ^I , 88 ^II are to an array 84 inside the battery case 30th of the accumulator 24th electrically connected and represent the actual electrochemical storage of the energy storage and supply system 1. The array 84 from accumulator cells 86 , 88 , 88 ^I , 88 ^II is through fillers 94 , 94 ^I , 94 ^II inside the battery case 30th held in place. The accumulator cells 86 , 88 , 88 ^I , 88 ^II are with their cell bases 90 in the direction of thrust 200 (please refer 3rd ) aligned. The lateral surfaces are thus located 92 the accumulator cells 86 , 88 , 88 ^I , 88 ^II (essentially) at right angles to the guide surfaces, such as the second guide surface 52 and the third guide surface 53 . The fillers 94 , 94 ^I , 94 ^II determine the cell spacing 100 between the battery cells 86 , 88 , 88 ^I , 88 ^II .

The battery door case 30th is made up of two half shells, like the half shell 34 , together. The half shells 34 are shaped to be part of the battery case 30th the handle 48 with its grip area 50 is. It also has the battery case 30th a cavity in which the latch 62 is installed. The lock 62 is located together with the handle 48 on the first page 26 of the accumulator 24th . By introducing a lateral force 204 can be the trigger 64 the lock 62 (see also 3rd ) in the cavity that is under control 48 passes, are pushed in. This will make the battery case 30th from the shaft 20th solved.

The second page 28 of the accumulator 24th has in their off-center area 32 , which is a housing end portion, a first connector 131 . The accumulator is 24th in the locked, inserted position, so the first plug is inserted 131 with the second connector 132 electrically conductive together. The second connector 132 is the first mating connector 141 (see. 5 ).

The areas of the battery electronics are for better illustration and easier identification 110 who have favourited Plugs 131 , 132 , 133 , 134 , 135 , 136 , the mating connector 141 as well as the cable 80 simplified, in particular not fully equipped, shown.

The battery case 30th of the accumulator 24th has drawbacks 36 , the shape of which corresponds to the indented shape of the guide surfaces 52 , 53 , are coordinated. Because of the deception 36 has the battery case 30th of the accumulator 24th a lower height in its edge areas.

The battery electronics 110 has electronic switches 112 on. Part of the battery electronics 110 is the interface 114 . To the interface 114 will also become the driver IC 116 the battery electronics 110 counted. Because of the electronic switch 112 can be the first connector 131 be de-energized and de-energized. In the compartment 60 , which is available as a charging connector compartment, is another electronics unit that uses electrical connections 78 or via a wiring harness 82 with the continuing plugs 132 , 135 connected is. In the charging connector compartment 60 there are voltage conversions, possibly current conversions, current limits and charging current regulations.

The socket 70 to which a charger 74 via a charging cable 76 can be connected has a manhole cover 66 , which is also used as a compartment lid 66 can be referred to, and that in the regular operation of the accumulator 24th the plug socket 70 protects against environmental influences such as moisture and dirt. From the charger 74 via the charging cable 76 leads through the manhole cover 66 an electrical connection to the charging plug 72 . By attacking the lid handle 68 can the charging cable 76 and thus the charger 74 from the compartment 60 and thus from the energy storage 22 uncoupled and the compartment 60 be closed like a dummy cover.

As from the representation of the 4th can be seen particularly well, includes the plug-in system 118 a whole series of similar plugs 131 , 132 , 133 , 134 , 135 , 136 . The plugs all have the same contacts 161 , 162 , 163 , 164 , 165 , 166 (see. 6 ). The current flow 202 should be charged by the charger 74 via the charging cable 76 through the compartment 60 about cables like the cable 80 or the wiring harness 82 into the battery cells 86 , 88 , 88 ' , 88 " of the array 84 of the accumulator 24th flow.

The in 4th shown first connector 131 comes along with its mating connector 141 in an exploded view in 5 shown. Will the accumulator after 3rd respectively. 4th in the Shaft 20th pushed in, the connectors approach 131 and mating connector 141 (please refer 5 ) keep touching each other until the two plugs, plugs 131 and mating connector 141 their male areas 182 and female areas 184 have interlaced. Only then is there an electrical contact to the array 84 , more precisely its accumulator cells 86 , 88 , 88 ^I , 88 ^II of the accumulator 24th produced. Before this is a touch of the conductive parts of the individual contacts 186 not possible.

Out 5 can be seen very well that first connector 131 and its mating connector 141 Flat connector 120 are that, like on the circumferential seam 143 , 143 ^I it can be seen that there are welded plastic plugs. Each of the two plugs 131 , 141 has six individual contacts like the single contact 186 which are all identical to one another in terms of their dimensions, proportions and mechanical configurations. This means that the contact spacing 151 , 152 , 153 , 154 , 155 all are the same. Every contact pitch 151 , 152 , 153 , 154 , 155 is between 7 mm and 9 mm, for the connector 5 at exactly 7.62 mm.

So that the mating connector 141 to the shaft 20th (please refer 4th ) can be fixed, are part of the mating connector 141 the mounting sleeves 142 , 142 ^I , 142 ^II , 142 ^III .

Each of the two plugs 131 , 141 has a fit 122 , 122 ^I , which expresses a voltage coding. This ensures that not an inappropriate battery 24th in a shaft 20th can be inserted with formation of electrical line connections.

Due to the identity of the individual contacts 186 both in the connector 131 as well as in the mating connector 141 all individual contacts are designed as touch-proof, polarity-independent and current flow direction-independent contacts. About the mounting sleeves 142 , 142 ^I , 142 ^II , 142 ^III can the mating connector 141 on the inside of the shaft 20th (see. 4th ) screwed or glued. Such a connector can be in an end region of the shaft 20th , as in 4th represented, placed.

By looking at the 4th and 5 that results from the connector 131 both power flows and data communications to the interface 114 are to be transferred.

In 6 are the contacts 161 , 162 , 163 , 164 , 165 , 166 (six contacts 161 , 162 , 163 , 164 , 165 , 166 ) shown in an essentially frontal view. Any contact 161 , 162 , 163 , 164 , 165 , 166 has a touch guard on the front 194 , 196 , ie on the face 198 .

On the edge of the contacts lined up next to each other on one level 161 , 162 , 163 , 164 , 165 , 166 are energy contacts 171 , 172 located. Between the energy contacts 171 , 172 are the control signal contacts 174 , 176 placed. Such control signal contacts 174 , 176 can as contacts 178 , 180 be designed for serial communication.

In addition, the connector has after 6 a fit 122 incorporated as coding.

Out 7 is the in 6 shown touch protection 194 , 196 can be seen particularly well because of the total contact 188 in the cuboid recording area 190 not to the common level 170 enough. Only over the prismatic recording area 192 can the contact tongues like the contact tongue 188 be touched.

The design options shown in the individual figures can also be connected to one another in any form.

It is thus possible to attach an energy store to a frame of the transport vehicle and to attach an energy store to a trough in a transport area.

It is also possible to distribute the electronic controls distributed on two electronic boards to more than two electronic boards.

The housing of the battery can be matched to the number of battery cells, i. that is, the housing can be made shorter overall with fewer battery cells to be enclosed. If more accumulator cells are to be arranged in the shell of the accumulator housing, the housing can be made a little longer.

The accumulator cells can be interconnected in a variety of ways. If a particularly high current is required, more battery cells can be connected in parallel. If a particularly high voltage is required, more battery cells can be connected in series.

Reference list

1

Energy storage and supply system

2nd

Load transport vehicle, especially cargo bike

4th

Load transport vehicle, especially stair climber or hand truck

6, 6 ^I

Load range

8th

saddle

10, 10 ^I.

Handlebars, especially with handles

12, 12 ^I.

wheel

14

wheel

16, 16 ^I.

Drive motor

18, 18 ^I.

Drive hub

20, 20 ^I , 20 ^II

Shaft

22

Energy storage

24th

accumulator

26

first side of the accumulator

28

second side of the accumulator

30th

Accumulator housing, in particular bowl-shaped housing

32

off-center area, in particular housing end area

34

Half shell

36

Deceit

38

Corner area

40

Housing division

42

Power button

44

Control surface

46

Operating status display, especially LED

48

Handle, especially handle

50

Grip surface

51

first management area

52

second guide surface

53

third management area

54

fourth management area

60

Compartment, in particular charging plug compartment

62

Interlock

64

Triggers, especially for the introduction of lateral forces

66

Manhole covers, especially compartment covers

68

Lid handle

70

Plug socket, in particular charging plug socket

72

Plugs, especially charging plugs

74

charger

76

Charging cable

78

electrical connection

80

Cable, especially to the first connector

82

Wiring harness

84

Array of accumulator cells

86

Accumulator cell, in particular lithium ion cell

88, 88 ^I , 8 ^II

Accumulator cell, in particular electrochemical round cell

90

Cell base

92

Lateral surface

94, 94 ^I , 9 ^II

Filling piece

100

Cell spacing

102

serial connection

104

parallel connection

110

Battery electronics

112

electronic switch

114

interface

116

Driver IC

118

Connector system

120

Plastic flat plug

122, 122 ^I

Fit

131

first connector

132

second connector

133

third connector

134

fourth connector

135

fifth connector

136

sixth connector

141

first mating connector

142, 142 ^I ,

Mounting sleeve

142 ^II , 142 ^III

143, 143 ^I.

Weld

151

first contact pitch

152

second contact pitch

153

third contact pitch

154

fourth contact pitch

155

fifth contact pitch

161

first contact, especially contact area

162

second contact, especially contact surface

163

third contact, especially contact surface

164

fourth contact, in particular contact area

165

fifth contact, in particular contact area

166

sixth contact, in particular contact area

170

common level

171

first energy contact

172

second energy contact

174

first control signal contact

176

second control signal contact

178

first contact for serial communication

180

second contact for serial communication

182

male area

184

female area

186

Individual contact

188

Tongue

190

cuboid recording area

192

prismatic recording area

194

first contact protection

196

second contact protection

198

Front side, especially the protection against contact

200

Direction of push or pull

202

Current flow

204

Shear force introduction

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• EP 3205564 A2 [0005]
• US 3907138 A [0006]
• EP 2261167 B1 [0006]
• DE 202007019691 U1 [0006]
• EP 1092826 B1 [0009]
• EP 2738080 B1 [0010]
• EP 0822135 B1 [0011]
• JP 2001088769 A [0011]
• EP 0728662 A2 [0012]
• US 6423443 B1 [0013]
• EP 2280436 B1 [0014]
• JP 2002170537 A [0015]
• DE 202017107506 U1 [0017]
• DE 202010008304 U1 [0018]
• CN 205801406 U [0019]
• JP 2001247069 A [0019]

Claims (16)

Energy store (1, 22) for electrical energy, in particular as an energy source for an electromotive drive (16, 16 ^I ), preferably a load transport vehicle (2, 4), such as a cargo bike (2), a stair climber (4), a load cart, one Pallet truck or a hand truck (4), with a shaft (20, 20 ^I , 20 ^II ) and with a sliding (20, 20 ^I , 20 ^II ) tuned, sliding battery (24), which is electrically connected to each other Array (84) of accumulator cells (88, 88 ^I , 88 ^II ), in particular lithium-ion cells (86), and optionally of accumulator electronics (110) with which at least one of the accumulator parameters temperature, voltage and current, in particular an accumulator cell surface (90 , 92), an exemplary battery cell ambient temperature, a set of temperatures of battery cell surfaces (90, 92) and / or of battery cell ambient temperatures, a battery cell voltage, a total voltage of the array (84) and / or a total current of the array (84), is measurable, assembled in a shell-shaped housing (30, 34), and with a plug system (118) comprising a plurality of plugs (131, 132, 133, 134 , 135, 136, 141) and optionally with a grip surface (50) which closes the accumulator (24) on one side and which connects one of the plugs (131, 132, 141), in particular a first plug (131), on an opposite side (26) opposite the housing (30) and to which guide surfaces (51, 52, 53, 54) on the housing (30) are aligned, characterized in that at least one first plug (131) has a contacts (161, 162, 163, 164) , 165, 166) for electrical energy and control signals unifying connector (131) with at least five or six contact spacings (151, 152, 153, 154, 155), wherein contact surfaces (161, 162, 163, 164, 165, 166) of the first connector (131) span a common plane (170). Energy storage (1, 22) after Claim 1 , characterized in that a mating connector (141) of the plug-in system (118) is fastened on an inside of the shaft (20, 20 ^I , 20 ^II ), preferably on the edge of an end region of the shaft (20, 20 ^I , 20 ^II ). Energy store (1, 22) according to one of the preceding claims, characterized in that at least the first plug (131), preferably the first plug (131) and its mating plug (141), with touch-proof, preferably polarity-independent and / or current flow direction-independent contacts ( 161), preferably all contacts (161, 162, 163, 164, 165, 166) of at least the first connector (131), in particular all contacts (161, 162, 163, 164, 165, 166) of all connectors, (131 , 141) have polarity-independent and in particular current flow direction-independent contacts (161, 162, 163, 164, 165, 166). Energy store (1, 22) according to one of the preceding claims, characterized in that a compartment (60) is arranged next to the shaft (20, 20 ^I , 20 ^II ), which as a charging plug compartment (60) extends along the inside of the shaft (20 , 20 ^I , 20 ^II ) of the accumulator (24), the compartment (60) preferably forming an electrical connection (78) via a cable (80) to the first plug (131), in particular with the mating plug (141 ) of the first plug (131), and in particular a charging operating state (46) of the battery (24) via electrical contacts (161, 162, 163, 164, 165, 166) for conducting electrical charging flows with the aid of the compartment (60 ) can be produced. Energy store (1, 22) according to one of the preceding claims, characterized in that a force-introducing, laterally arranged lock (62) for locking the accumulator (24) in the shaft (20, 20 ^I , 20 ^II ) is provided, which is preferably by a Lateral force introduction (204) can be released with a force in the single-digit Newton range. Energy store (1, 22) according to one of the preceding claims, characterized in that in a front area, preferably in the vicinity of the gripping surface (50), a removable manhole cover (66), preferably with a cover handle (68), on the energy store (1, 22) is present, behind which a plug socket (70) or a plug (72) is accessible, via which the accumulator (24) can be connected when plugged in, preferably by means of a plug socket (70) or plug (72) Power source, such as a charger (74), can be charged. Energy store (1, 22) according to one of the preceding claims, characterized in that the plug (131) has electrical contacts (171, 172) for energy in the region of at least one outer side of the plug (131), the contacts (171, 172 preferably being) ) for energy and contacts (174, 176) for control signals in a contact grid (151, 152, 153, 154, 155) with a repetitive dimension with a distance between 7 mm and 8 mm, a contact (174, 176) for control signals being arranged between the contacts (171, 172) for energy, the latter contacts being at least five contact pitch (151, 152, 153 , 154, 155) are apart. Energy store (1, 22) according to one of the preceding claims, characterized in that the plug (131) is an ultrasonically welded flat plastic plug (120) and in particular has a fit (122, 122 ^I ), the fit (122, 122 ^I ) being one Coding of a type voltage value of the energy store (1, 22), such as a maximum charging voltage. Energy store (1, 22) according to one of the preceding claims, characterized in that each contact (161, 162, 163, 164, 165, 166) of a plug (131, 141) has a male area (182) and a female area (184 ), wherein preferably a contact (161, 162, 163, 164, 165, 166) is divided substantially in half into its male area (182) and its female area (184). Energy store (1, 22) according to one of the preceding claims, characterized in that at least the first plug (131), preferably all plugs (141) of the plug-in system (118), have separable or spatially lockable individual contacts (186), each of which the individual contacts (186) have a resilient, electrically conductive contact tongue (188) forming the contact surface (161, 162, 163, 164, 165, 166), such as a copper tongue, a tin-plated tongue or a gold-plated tongue, immediately adjacent a cuboid-shaped receiving area (190) is present on a first side of the contact tongue (188) and a prismatic, U-shaped receiving area (192) is provided on an opposite second side of the contact tongue (188), each for receiving a contact protection (194, 196), so that in particular an electrical conductivity of the individual contact (186) can only be formed on an inner end face (198) of a touch guard (194, 196). Energy store (1, 22) according to one of the preceding claims, characterized in that the accumulator (24) cooperates with a fuse and the accumulator electronics (110) cooperate with, in particular electronic, switches (112), in particular as part of the accumulator electronics (110) , through which a current flow (202) to and / or from the first plug (131) can be interrupted. Energy store (1, 22) according to one of the preceding claims, characterized in that the first plug (131) is equipped with contacts (178, 180) for serial communication, in particular for communication according to a CAN bus protocol, and preferably the accumulator electronics (110) comprises an interface (114) with a driver IC (116) for serial communication such as CAN bus communication, which is connected to the contacts (178, 180) for serial communication via a cable harness. Accumulator (24), in particular for an energy store (1, 22) according to one of the preceding claims, which has a gripping surface (5), a plug (131) and a plurality of guide surfaces (51, 52), characterized in that the accumulator (24 ) connected in parallel (104) and / or in series (102), electrochemical power storage (88, 88 ^I , 88 ^II ), such as Li-ion battery cells (86), which are aligned in parallel from one side (32 ) of a housing (30) of the rechargeable battery (24), connected to a single connector (131), which can be referred to in particular as a central plug, preferably arranged off-center on the side (32) of the rechargeable battery (24), with more than four contacts (161, 162, 163, 164, 165, 166) are limited. Accumulator (24) according to the preceding claim, characterized in that the housing (30) of the accumulator (24) is formed from, in particular in plastic injection molding, half-shells (34) with drawbacks (36) in the corner regions (38), whereby a Housing division (40) in the handle surface (50), in particular in a handle (48) of the handle surface (50), extends transversely to the intended direction of thrust (200). Accumulator (24) after Claim 13 or 14 , characterized in that a power storage capacity is created by combining lithium-ion round cells (86, 88, 88 ^I , 88 ^II ) with a round base (90) between 18 mm and 21 mm, preferably with their lateral surfaces (92) which are kept at a distance (100) by means of sleeve-like fillers (94, 94 ^I , 94 ^II ) which are advantageously only present in the edge regions of the lateral surfaces (92) and are aligned parallel to one another. Accumulator (24) according to one of the three preceding claims, characterized in that the gripping surface (50) in the form of a handle (48) is an upstream, in particular downstream area (42, 44, 46) of the housing (30) protecting part, which is upstream of a power button (42) and / or an operating surface (44) , in particular the handle (48) and the switch button (42) and / or the control surface (44) are arranged in a same plane with respect to the direction of thrust (200).

Images